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 4
  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 /* The 5 accounts for the PNFS attributes, and assumes that at most three
 117  * layout types will be returned.
 118  */
 119 #define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + \
 120                                  nfs4_fattr_bitmap_maxsz + 4 + 8 + 5)
 121 #define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 122 #define decode_renew_maxsz      (op_decode_hdr_maxsz)
 123 #define encode_setclientid_maxsz \
 124                                 (op_encode_hdr_maxsz + \
 125                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 126                                 XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
 127                                 1 /* sc_prog */ + \
 128                                 XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 129                                 XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
 130                                 1) /* sc_cb_ident */
 131 #define decode_setclientid_maxsz \
 132                                 (op_decode_hdr_maxsz + \
 133                                 2 + \
 134                                 1024) /* large value for CLID_INUSE */
 135 #define encode_setclientid_confirm_maxsz \
 136                                 (op_encode_hdr_maxsz + \
 137                                 3 + (NFS4_VERIFIER_SIZE >> 2))
 138 #define decode_setclientid_confirm_maxsz \
 139                                 (op_decode_hdr_maxsz)
 140 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
 141 #define decode_lookup_maxsz     (op_decode_hdr_maxsz)
 142 #define encode_share_access_maxsz \
 143                                 (2)
 144 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
 145 #define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
 146 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
 147 #define encode_open_maxsz       (op_encode_hdr_maxsz + \
 148                                 2 + encode_share_access_maxsz + 2 + \
 149                                 open_owner_id_maxsz + \
 150                                 encode_opentype_maxsz + \
 151                                 encode_claim_null_maxsz)
 152 #define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
 153 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
 154                                 decode_ace_maxsz)
 155 #define decode_change_info_maxsz        (5)
 156 #define decode_open_maxsz       (op_decode_hdr_maxsz + \
 157                                 decode_stateid_maxsz + \
 158                                 decode_change_info_maxsz + 1 + \
 159                                 nfs4_fattr_bitmap_maxsz + \
 160                                 decode_delegation_maxsz)
 161 #define encode_open_confirm_maxsz \
 162                                 (op_encode_hdr_maxsz + \
 163                                  encode_stateid_maxsz + 1)
 164 #define decode_open_confirm_maxsz \
 165                                 (op_decode_hdr_maxsz + \
 166                                  decode_stateid_maxsz)
 167 #define encode_open_downgrade_maxsz \
 168                                 (op_encode_hdr_maxsz + \
 169                                  encode_stateid_maxsz + 1 + \
 170                                  encode_share_access_maxsz)
 171 #define decode_open_downgrade_maxsz \
 172                                 (op_decode_hdr_maxsz + \
 173                                  decode_stateid_maxsz)
 174 #define encode_close_maxsz      (op_encode_hdr_maxsz + \
 175                                  1 + encode_stateid_maxsz)
 176 #define decode_close_maxsz      (op_decode_hdr_maxsz + \
 177                                  decode_stateid_maxsz)
 178 #define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
 179                                  encode_stateid_maxsz + \
 180                                  encode_attrs_maxsz)
 181 #define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
 182                                  nfs4_fattr_bitmap_maxsz)
 183 #define encode_read_maxsz       (op_encode_hdr_maxsz + \
 184                                  encode_stateid_maxsz + 3)
 185 #define decode_read_maxsz       (op_decode_hdr_maxsz + 2)
 186 #define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
 187                                  2 + encode_verifier_maxsz + 5)
 188 #define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
 189                                  decode_verifier_maxsz)
 190 #define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 191 #define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1)
 192 #define encode_write_maxsz      (op_encode_hdr_maxsz + \
 193                                  encode_stateid_maxsz + 4)
 194 #define decode_write_maxsz      (op_decode_hdr_maxsz + \
 195                                  2 + decode_verifier_maxsz)
 196 #define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
 197 #define decode_commit_maxsz     (op_decode_hdr_maxsz + \
 198                                  decode_verifier_maxsz)
 199 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 200                                 nfs4_name_maxsz)
 201 #define decode_remove_maxsz     (op_decode_hdr_maxsz + \
 202                                  decode_change_info_maxsz)
 203 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 204                                 2 * nfs4_name_maxsz)
 205 #define decode_rename_maxsz     (op_decode_hdr_maxsz + \
 206                                  decode_change_info_maxsz + \
 207                                  decode_change_info_maxsz)
 208 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 209                                 nfs4_name_maxsz)
 210 #define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
 211 #define encode_lockowner_maxsz  (7)
 212 #define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 213                                  7 + \
 214                                  1 + encode_stateid_maxsz + 1 + \
 215                                  encode_lockowner_maxsz)
 216 #define decode_lock_denied_maxsz \
 217                                 (8 + decode_lockowner_maxsz)
 218 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 219                                  decode_lock_denied_maxsz)
 220 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 5 + \
 221                                 encode_lockowner_maxsz)
 222 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 223                                  decode_lock_denied_maxsz)
 224 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 225                                  encode_stateid_maxsz + \
 226                                  4)
 227 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 228                                  decode_stateid_maxsz)
 229 #define encode_release_lockowner_maxsz \
 230                                 (op_encode_hdr_maxsz + \
 231                                  encode_lockowner_maxsz)
 232 #define decode_release_lockowner_maxsz \
 233                                 (op_decode_hdr_maxsz)
 234 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 235 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 236 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 237                                 1 + nfs4_name_maxsz + \
 238                                 1 + \
 239                                 nfs4_fattr_maxsz)
 240 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 241 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 242                                 1 + 2 + nfs4_name_maxsz + \
 243                                 encode_attrs_maxsz)
 244 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
 245                                 decode_change_info_maxsz + \
 246                                 nfs4_fattr_bitmap_maxsz)
 247 #define encode_statfs_maxsz     (encode_getattr_maxsz)
 248 #define decode_statfs_maxsz     (decode_getattr_maxsz)
 249 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 250 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 251 #define encode_getacl_maxsz     (encode_getattr_maxsz)
 252 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 253                                  nfs4_fattr_bitmap_maxsz + 1)
 254 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 255                                  encode_stateid_maxsz + 3)
 256 #define decode_setacl_maxsz     (decode_setattr_maxsz)
 257 #define encode_fs_locations_maxsz \
 258                                 (encode_getattr_maxsz)
 259 #define decode_fs_locations_maxsz \
 260                                 (0)
 261 #define encode_secinfo_maxsz    (op_encode_hdr_maxsz + nfs4_name_maxsz)
 262 #define decode_secinfo_maxsz    (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
 263
 264 #if defined(CONFIG_NFS_V4_1)
 265 #define NFS4_MAX_MACHINE_NAME_LEN (64)
 266
 267 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
 268                                 encode_verifier_maxsz + \
 269                                 1 /* co_ownerid.len */ + \
 270                                 XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
 271                                 1 /* flags */ + \
 272                                 1 /* spa_how */ + \
 273                                 0 /* SP4_NONE (for now) */ + \
 274                                 1 /* zero implemetation id array */)
 275 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
 276                                 2 /* eir_clientid */ + \
 277                                 1 /* eir_sequenceid */ + \
 278                                 1 /* eir_flags */ + \
 279                                 1 /* spr_how */ + \
 280                                 0 /* SP4_NONE (for now) */ + \
 281                                 2 /* eir_server_owner.so_minor_id */ + \
 282                                 /* eir_server_owner.so_major_id<> */ \
 283                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 284                                 /* eir_server_scope<> */ \
 285                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 286                                 1 /* eir_server_impl_id array length */ + \
 287                                 0 /* ignored eir_server_impl_id contents */)
 288 #define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
 289 #define decode_channel_attrs_maxsz  (6 + \
 290                                      1 /* ca_rdma_ird.len */ + \
 291                                      1 /* ca_rdma_ird */)
 292 #define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
 293                                      2 /* csa_clientid */ + \
 294                                      1 /* csa_sequence */ + \
 295                                      1 /* csa_flags */ + \
 296                                      encode_channel_attrs_maxsz + \
 297                                      encode_channel_attrs_maxsz + \
 298                                      1 /* csa_cb_program */ + \
 299                                      1 /* csa_sec_parms.len (1) */ + \
 300                                      1 /* cb_secflavor (AUTH_SYS) */ + \
 301                                      1 /* stamp */ + \
 302                                      1 /* machinename.len */ + \
 303                                      XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
 304                                      1 /* uid */ + \
 305                                      1 /* gid */ + \
 306                                      1 /* gids.len (0) */)
 307 #define decode_create_session_maxsz  (op_decode_hdr_maxsz +     \
 308                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 309                                      1 /* csr_sequence */ + \
 310                                      1 /* csr_flags */ + \
 311                                      decode_channel_attrs_maxsz + \
 312                                      decode_channel_attrs_maxsz)
 313 #define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
 314 #define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
 315 #define encode_sequence_maxsz   (op_encode_hdr_maxsz + \
 316                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
 317 #define decode_sequence_maxsz   (op_decode_hdr_maxsz + \
 318                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
 319 #define encode_reclaim_complete_maxsz   (op_encode_hdr_maxsz + 4)
 320 #define decode_reclaim_complete_maxsz   (op_decode_hdr_maxsz + 4)
 321 #define encode_getdevicelist_maxsz (op_encode_hdr_maxsz + 4 + \
 322                                 encode_verifier_maxsz)
 323 #define decode_getdevicelist_maxsz (op_decode_hdr_maxsz + \
 324                                 2 /* nfs_cookie4 gdlr_cookie */ + \
 325                                 decode_verifier_maxsz \
 326                                   /* verifier4 gdlr_verifier */ + \
 327                                 1 /* gdlr_deviceid_list count */ + \
 328                                 XDR_QUADLEN(NFS4_PNFS_GETDEVLIST_MAXNUM * \
 329                                             NFS4_DEVICEID4_SIZE) \
 330                                   /* gdlr_deviceid_list */ + \
 331                                 1 /* bool gdlr_eof */)
 332 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + 4 + \
 333                                 XDR_QUADLEN(NFS4_DEVICEID4_SIZE))
 334 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
 335                                 1 /* layout type */ + \
 336                                 1 /* opaque devaddr4 length */ + \
 337                                   /* devaddr4 payload is read into page */ \
 338                                 1 /* notification bitmap length */ + \
 339                                 1 /* notification bitmap */)
 340 #define encode_layoutget_maxsz  (op_encode_hdr_maxsz + 10 + \
 341                                 encode_stateid_maxsz)
 342 #define decode_layoutget_maxsz  (op_decode_hdr_maxsz + 8 + \
 343                                 decode_stateid_maxsz + \
 344                                 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
 345 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz +          \
 346                                 2 /* offset */ + \
 347                                 2 /* length */ + \
 348                                 1 /* reclaim */ + \
 349                                 encode_stateid_maxsz + \
 350                                 1 /* new offset (true) */ + \
 351                                 2 /* last byte written */ + \
 352                                 1 /* nt_timechanged (false) */ + \
 353                                 1 /* layoutupdate4 layout type */ + \
 354                                 1 /* NULL filelayout layoutupdate4 payload */)
 355 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
 356 #define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
 357                                 encode_stateid_maxsz + \
 358                                 1 /* FIXME: opaque lrf_body always empty at the moment */)
 359 #define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
 360                                 1 + decode_stateid_maxsz)
 361 #define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
 362 #define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
 363 #define encode_test_stateid_maxsz       (op_encode_hdr_maxsz + 2 + \
 364                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 365 #define decode_test_stateid_maxsz       (op_decode_hdr_maxsz + 2 + 1)
 366 #define encode_free_stateid_maxsz       (op_encode_hdr_maxsz + 1 + \
 367                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 368 #define decode_free_stateid_maxsz       (op_decode_hdr_maxsz + 1)
 369 #else /* CONFIG_NFS_V4_1 */
 370 #define encode_sequence_maxsz   0
 371 #define decode_sequence_maxsz   0
 372 #endif /* CONFIG_NFS_V4_1 */
 373
 374 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 375 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 376 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 377                                 encode_sequence_maxsz + \
 378                                 encode_putfh_maxsz + \
 379                                 encode_read_maxsz)
 380 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 381                                 decode_sequence_maxsz + \
 382                                 decode_putfh_maxsz + \
 383                                 decode_read_maxsz)
 384 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 385                                 encode_sequence_maxsz + \
 386                                 encode_putfh_maxsz + \
 387                                 encode_readlink_maxsz)
 388 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 389                                 decode_sequence_maxsz + \
 390                                 decode_putfh_maxsz + \
 391                                 decode_readlink_maxsz)
 392 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 393                                 encode_sequence_maxsz + \
 394                                 encode_putfh_maxsz + \
 395                                 encode_readdir_maxsz)
 396 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 397                                 decode_sequence_maxsz + \
 398                                 decode_putfh_maxsz + \
 399                                 decode_readdir_maxsz)
 400 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 401                                 encode_sequence_maxsz + \
 402                                 encode_putfh_maxsz + \
 403                                 encode_write_maxsz + \
 404                                 encode_getattr_maxsz)
 405 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 406                                 decode_sequence_maxsz + \
 407                                 decode_putfh_maxsz + \
 408                                 decode_write_maxsz + \
 409                                 decode_getattr_maxsz)
 410 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 411                                 encode_sequence_maxsz + \
 412                                 encode_putfh_maxsz + \
 413                                 encode_commit_maxsz + \
 414                                 encode_getattr_maxsz)
 415 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 416                                 decode_sequence_maxsz + \
 417                                 decode_putfh_maxsz + \
 418                                 decode_commit_maxsz + \
 419                                 decode_getattr_maxsz)
 420 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 421                                 encode_sequence_maxsz + \
 422                                 encode_putfh_maxsz + \
 423                                 encode_savefh_maxsz + \
 424                                 encode_open_maxsz + \
 425                                 encode_getfh_maxsz + \
 426                                 encode_getattr_maxsz + \
 427                                 encode_restorefh_maxsz + \
 428                                 encode_getattr_maxsz)
 429 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 430                                 decode_sequence_maxsz + \
 431                                 decode_putfh_maxsz + \
 432                                 decode_savefh_maxsz + \
 433                                 decode_open_maxsz + \
 434                                 decode_getfh_maxsz + \
 435                                 decode_getattr_maxsz + \
 436                                 decode_restorefh_maxsz + \
 437                                 decode_getattr_maxsz)
 438 #define NFS4_enc_open_confirm_sz \
 439                                 (compound_encode_hdr_maxsz + \
 440                                  encode_putfh_maxsz + \
 441                                  encode_open_confirm_maxsz)
 442 #define NFS4_dec_open_confirm_sz \
 443                                 (compound_decode_hdr_maxsz + \
 444                                  decode_putfh_maxsz + \
 445                                  decode_open_confirm_maxsz)
 446 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 447                                         encode_sequence_maxsz + \
 448                                         encode_putfh_maxsz + \
 449                                         encode_open_maxsz + \
 450                                         encode_getattr_maxsz)
 451 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 452                                         decode_sequence_maxsz + \
 453                                         decode_putfh_maxsz + \
 454                                         decode_open_maxsz + \
 455                                         decode_getattr_maxsz)
 456 #define NFS4_enc_open_downgrade_sz \
 457                                 (compound_encode_hdr_maxsz + \
 458                                  encode_sequence_maxsz + \
 459                                  encode_putfh_maxsz + \
 460                                  encode_open_downgrade_maxsz + \
 461                                  encode_getattr_maxsz)
 462 #define NFS4_dec_open_downgrade_sz \
 463                                 (compound_decode_hdr_maxsz + \
 464                                  decode_sequence_maxsz + \
 465                                  decode_putfh_maxsz + \
 466                                  decode_open_downgrade_maxsz + \
 467                                  decode_getattr_maxsz)
 468 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 469                                  encode_sequence_maxsz + \
 470                                  encode_putfh_maxsz + \
 471                                  encode_close_maxsz + \
 472                                  encode_getattr_maxsz)
 473 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 474                                  decode_sequence_maxsz + \
 475                                  decode_putfh_maxsz + \
 476                                  decode_close_maxsz + \
 477                                  decode_getattr_maxsz)
 478 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 479                                  encode_sequence_maxsz + \
 480                                  encode_putfh_maxsz + \
 481                                  encode_setattr_maxsz + \
 482                                  encode_getattr_maxsz)
 483 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 484                                  decode_sequence_maxsz + \
 485                                  decode_putfh_maxsz + \
 486                                  decode_setattr_maxsz + \
 487                                  decode_getattr_maxsz)
 488 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 489                                 encode_sequence_maxsz + \
 490                                 encode_putfh_maxsz + \
 491                                 encode_fsinfo_maxsz)
 492 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 493                                 decode_sequence_maxsz + \
 494                                 decode_putfh_maxsz + \
 495                                 decode_fsinfo_maxsz)
 496 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 497                                 encode_renew_maxsz)
 498 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 499                                 decode_renew_maxsz)
 500 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 501                                 encode_setclientid_maxsz)
 502 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 503                                 decode_setclientid_maxsz)
 504 #define NFS4_enc_setclientid_confirm_sz \
 505                                 (compound_encode_hdr_maxsz + \
 506                                 encode_setclientid_confirm_maxsz + \
 507                                 encode_putrootfh_maxsz + \
 508                                 encode_fsinfo_maxsz)
 509 #define NFS4_dec_setclientid_confirm_sz \
 510                                 (compound_decode_hdr_maxsz + \
 511                                 decode_setclientid_confirm_maxsz + \
 512                                 decode_putrootfh_maxsz + \
 513                                 decode_fsinfo_maxsz)
 514 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 515                                 encode_sequence_maxsz + \
 516                                 encode_putfh_maxsz + \
 517                                 encode_lock_maxsz)
 518 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 519                                 decode_sequence_maxsz + \
 520                                 decode_putfh_maxsz + \
 521                                 decode_lock_maxsz)
 522 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 523                                 encode_sequence_maxsz + \
 524                                 encode_putfh_maxsz + \
 525                                 encode_lockt_maxsz)
 526 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 527                                  decode_sequence_maxsz + \
 528                                  decode_putfh_maxsz + \
 529                                  decode_lockt_maxsz)
 530 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 531                                 encode_sequence_maxsz + \
 532                                 encode_putfh_maxsz + \
 533                                 encode_locku_maxsz)
 534 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 535                                 decode_sequence_maxsz + \
 536                                 decode_putfh_maxsz + \
 537                                 decode_locku_maxsz)
 538 #define NFS4_enc_release_lockowner_sz \
 539                                 (compound_encode_hdr_maxsz + \
 540                                  encode_lockowner_maxsz)
 541 #define NFS4_dec_release_lockowner_sz \
 542                                 (compound_decode_hdr_maxsz + \
 543                                  decode_lockowner_maxsz)
 544 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 545                                 encode_sequence_maxsz + \
 546                                 encode_putfh_maxsz + \
 547                                 encode_access_maxsz + \
 548                                 encode_getattr_maxsz)
 549 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 550                                 decode_sequence_maxsz + \
 551                                 decode_putfh_maxsz + \
 552                                 decode_access_maxsz + \
 553                                 decode_getattr_maxsz)
 554 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 555                                 encode_sequence_maxsz + \
 556                                 encode_putfh_maxsz + \
 557                                 encode_getattr_maxsz)
 558 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 559                                 decode_sequence_maxsz + \
 560                                 decode_putfh_maxsz + \
 561                                 decode_getattr_maxsz)
 562 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 563                                 encode_sequence_maxsz + \
 564                                 encode_putfh_maxsz + \
 565                                 encode_lookup_maxsz + \
 566                                 encode_getattr_maxsz + \
 567                                 encode_getfh_maxsz)
 568 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 569                                 decode_sequence_maxsz + \
 570                                 decode_putfh_maxsz + \
 571                                 decode_lookup_maxsz + \
 572                                 decode_getattr_maxsz + \
 573                                 decode_getfh_maxsz)
 574 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 575                                 encode_sequence_maxsz + \
 576                                 encode_putrootfh_maxsz + \
 577                                 encode_getattr_maxsz + \
 578                                 encode_getfh_maxsz)
 579 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 580                                 decode_sequence_maxsz + \
 581                                 decode_putrootfh_maxsz + \
 582                                 decode_getattr_maxsz + \
 583                                 decode_getfh_maxsz)
 584 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 585                                 encode_sequence_maxsz + \
 586                                 encode_putfh_maxsz + \
 587                                 encode_remove_maxsz + \
 588                                 encode_getattr_maxsz)
 589 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 590                                 decode_sequence_maxsz + \
 591                                 decode_putfh_maxsz + \
 592                                 decode_remove_maxsz + \
 593                                 decode_getattr_maxsz)
 594 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 595                                 encode_sequence_maxsz + \
 596                                 encode_putfh_maxsz + \
 597                                 encode_savefh_maxsz + \
 598                                 encode_putfh_maxsz + \
 599                                 encode_rename_maxsz + \
 600                                 encode_getattr_maxsz + \
 601                                 encode_restorefh_maxsz + \
 602                                 encode_getattr_maxsz)
 603 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 604                                 decode_sequence_maxsz + \
 605                                 decode_putfh_maxsz + \
 606                                 decode_savefh_maxsz + \
 607                                 decode_putfh_maxsz + \
 608                                 decode_rename_maxsz + \
 609                                 decode_getattr_maxsz + \
 610                                 decode_restorefh_maxsz + \
 611                                 decode_getattr_maxsz)
 612 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 613                                 encode_sequence_maxsz + \
 614                                 encode_putfh_maxsz + \
 615                                 encode_savefh_maxsz + \
 616                                 encode_putfh_maxsz + \
 617                                 encode_link_maxsz + \
 618                                 decode_getattr_maxsz + \
 619                                 encode_restorefh_maxsz + \
 620                                 decode_getattr_maxsz)
 621 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 622                                 decode_sequence_maxsz + \
 623                                 decode_putfh_maxsz + \
 624                                 decode_savefh_maxsz + \
 625                                 decode_putfh_maxsz + \
 626                                 decode_link_maxsz + \
 627                                 decode_getattr_maxsz + \
 628                                 decode_restorefh_maxsz + \
 629                                 decode_getattr_maxsz)
 630 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 631                                 encode_sequence_maxsz + \
 632                                 encode_putfh_maxsz + \
 633                                 encode_symlink_maxsz + \
 634                                 encode_getattr_maxsz + \
 635                                 encode_getfh_maxsz)
 636 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 637                                 decode_sequence_maxsz + \
 638                                 decode_putfh_maxsz + \
 639                                 decode_symlink_maxsz + \
 640                                 decode_getattr_maxsz + \
 641                                 decode_getfh_maxsz)
 642 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 643                                 encode_sequence_maxsz + \
 644                                 encode_putfh_maxsz + \
 645                                 encode_savefh_maxsz + \
 646                                 encode_create_maxsz + \
 647                                 encode_getfh_maxsz + \
 648                                 encode_getattr_maxsz + \
 649                                 encode_restorefh_maxsz + \
 650                                 encode_getattr_maxsz)
 651 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 652                                 decode_sequence_maxsz + \
 653                                 decode_putfh_maxsz + \
 654                                 decode_savefh_maxsz + \
 655                                 decode_create_maxsz + \
 656                                 decode_getfh_maxsz + \
 657                                 decode_getattr_maxsz + \
 658                                 decode_restorefh_maxsz + \
 659                                 decode_getattr_maxsz)
 660 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 661                                 encode_sequence_maxsz + \
 662                                 encode_putfh_maxsz + \
 663                                 encode_getattr_maxsz)
 664 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 665                                 decode_sequence_maxsz + \
 666                                 decode_putfh_maxsz + \
 667                                 decode_getattr_maxsz)
 668 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 669                                 encode_sequence_maxsz + \
 670                                 encode_putfh_maxsz + \
 671                                 encode_statfs_maxsz)
 672 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 673                                 decode_sequence_maxsz + \
 674                                 decode_putfh_maxsz + \
 675                                 decode_statfs_maxsz)
 676 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 677                                 encode_sequence_maxsz + \
 678                                 encode_putfh_maxsz + \
 679                                 encode_getattr_maxsz)
 680 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 681                                 decode_sequence_maxsz + \
 682                                 decode_putfh_maxsz + \
 683                                 decode_getattr_maxsz)
 684 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 685                                 encode_sequence_maxsz + \
 686                                 encode_putfh_maxsz + \
 687                                 encode_delegreturn_maxsz + \
 688                                 encode_getattr_maxsz)
 689 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 690                                 decode_sequence_maxsz + \
 691                                 decode_delegreturn_maxsz + \
 692                                 decode_getattr_maxsz)
 693 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 694                                 encode_sequence_maxsz + \
 695                                 encode_putfh_maxsz + \
 696                                 encode_getacl_maxsz)
 697 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 698                                 decode_sequence_maxsz + \
 699                                 decode_putfh_maxsz + \
 700                                 decode_getacl_maxsz)
 701 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 702                                 encode_sequence_maxsz + \
 703                                 encode_putfh_maxsz + \
 704                                 encode_setacl_maxsz)
 705 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 706                                 decode_sequence_maxsz + \
 707                                 decode_putfh_maxsz + \
 708                                 decode_setacl_maxsz)
 709 #define NFS4_enc_fs_locations_sz \
 710                                 (compound_encode_hdr_maxsz + \
 711                                  encode_sequence_maxsz + \
 712                                  encode_putfh_maxsz + \
 713                                  encode_lookup_maxsz + \
 714                                  encode_fs_locations_maxsz)
 715 #define NFS4_dec_fs_locations_sz \
 716                                 (compound_decode_hdr_maxsz + \
 717                                  decode_sequence_maxsz + \
 718                                  decode_putfh_maxsz + \
 719                                  decode_lookup_maxsz + \
 720                                  decode_fs_locations_maxsz)
 721 #define NFS4_enc_secinfo_sz     (compound_encode_hdr_maxsz + \
 722                                 encode_sequence_maxsz + \
 723                                 encode_putfh_maxsz + \
 724                                 encode_secinfo_maxsz)
 725 #define NFS4_dec_secinfo_sz     (compound_decode_hdr_maxsz + \
 726                                 decode_sequence_maxsz + \
 727                                 decode_putfh_maxsz + \
 728                                 decode_secinfo_maxsz)
 729 #if defined(CONFIG_NFS_V4_1)
 730 #define NFS4_enc_exchange_id_sz \
 731                                 (compound_encode_hdr_maxsz + \
 732                                  encode_exchange_id_maxsz)
 733 #define NFS4_dec_exchange_id_sz \
 734                                 (compound_decode_hdr_maxsz + \
 735                                  decode_exchange_id_maxsz)
 736 #define NFS4_enc_create_session_sz \
 737                                 (compound_encode_hdr_maxsz + \
 738                                  encode_create_session_maxsz)
 739 #define NFS4_dec_create_session_sz \
 740                                 (compound_decode_hdr_maxsz + \
 741                                  decode_create_session_maxsz)
 742 #define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
 743                                          encode_destroy_session_maxsz)
 744 #define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
 745                                          decode_destroy_session_maxsz)
 746 #define NFS4_enc_sequence_sz \
 747                                 (compound_decode_hdr_maxsz + \
 748                                  encode_sequence_maxsz)
 749 #define NFS4_dec_sequence_sz \
 750                                 (compound_decode_hdr_maxsz + \
 751                                  decode_sequence_maxsz)
 752 #define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
 753                                          encode_sequence_maxsz + \
 754                                          encode_putrootfh_maxsz + \
 755                                          encode_fsinfo_maxsz)
 756 #define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
 757                                          decode_sequence_maxsz + \
 758                                          decode_putrootfh_maxsz + \
 759                                          decode_fsinfo_maxsz)
 760 #define NFS4_enc_reclaim_complete_sz    (compound_encode_hdr_maxsz + \
 761                                          encode_sequence_maxsz + \
 762                                          encode_reclaim_complete_maxsz)
 763 #define NFS4_dec_reclaim_complete_sz    (compound_decode_hdr_maxsz + \
 764                                          decode_sequence_maxsz + \
 765                                          decode_reclaim_complete_maxsz)
 766 #define NFS4_enc_getdevicelist_sz (compound_encode_hdr_maxsz + \
 767                                 encode_sequence_maxsz + \
 768                                 encode_putfh_maxsz + \
 769                                 encode_getdevicelist_maxsz)
 770 #define NFS4_dec_getdevicelist_sz (compound_decode_hdr_maxsz + \
 771                                 decode_sequence_maxsz + \
 772                                 decode_putfh_maxsz + \
 773                                 decode_getdevicelist_maxsz)
 774 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
 775                                 encode_sequence_maxsz +\
 776                                 encode_getdeviceinfo_maxsz)
 777 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
 778                                 decode_sequence_maxsz + \
 779                                 decode_getdeviceinfo_maxsz)
 780 #define NFS4_enc_layoutget_sz   (compound_encode_hdr_maxsz + \
 781                                 encode_sequence_maxsz + \
 782                                 encode_putfh_maxsz +        \
 783                                 encode_layoutget_maxsz)
 784 #define NFS4_dec_layoutget_sz   (compound_decode_hdr_maxsz + \
 785                                 decode_sequence_maxsz + \
 786                                 decode_putfh_maxsz +        \
 787                                 decode_layoutget_maxsz)
 788 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
 789                                 encode_sequence_maxsz +\
 790                                 encode_putfh_maxsz + \
 791                                 encode_layoutcommit_maxsz + \
 792                                 encode_getattr_maxsz)
 793 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
 794                                 decode_sequence_maxsz + \
 795                                 decode_putfh_maxsz + \
 796                                 decode_layoutcommit_maxsz + \
 797                                 decode_getattr_maxsz)
 798 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
 799                                 encode_sequence_maxsz + \
 800                                 encode_putfh_maxsz + \
 801                                 encode_layoutreturn_maxsz)
 802 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
 803                                 decode_sequence_maxsz + \
 804                                 decode_putfh_maxsz + \
 805                                 decode_layoutreturn_maxsz)
 806 #define NFS4_enc_secinfo_no_name_sz     (compound_encode_hdr_maxsz + \
 807                                         encode_sequence_maxsz + \
 808                                         encode_putrootfh_maxsz +\
 809                                         encode_secinfo_no_name_maxsz)
 810 #define NFS4_dec_secinfo_no_name_sz     (compound_decode_hdr_maxsz + \
 811                                         decode_sequence_maxsz + \
 812                                         decode_putrootfh_maxsz + \
 813                                         decode_secinfo_no_name_maxsz)
 814 #define NFS4_enc_test_stateid_sz        (compound_encode_hdr_maxsz + \
 815                                          encode_sequence_maxsz + \
 816                                          encode_test_stateid_maxsz)
 817 #define NFS4_dec_test_stateid_sz        (compound_decode_hdr_maxsz + \
 818                                          decode_sequence_maxsz + \
 819                                          decode_test_stateid_maxsz)
 820 #define NFS4_enc_free_stateid_sz        (compound_encode_hdr_maxsz + \
 821                                          encode_sequence_maxsz + \
 822                                          encode_free_stateid_maxsz)
 823 #define NFS4_dec_free_stateid_sz        (compound_decode_hdr_maxsz + \
 824                                          decode_sequence_maxsz + \
 825                                          decode_free_stateid_maxsz)
 826
 827 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 828                                       compound_encode_hdr_maxsz +
 829                                       encode_sequence_maxsz +
 830                                       encode_putfh_maxsz +
 831                                       encode_getattr_maxsz) *
 832                                      XDR_UNIT);
 833
 834 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 835                                      compound_decode_hdr_maxsz +
 836                                      decode_sequence_maxsz +
 837                                      decode_putfh_maxsz) *
 838                                     XDR_UNIT);
 839 #endif /* CONFIG_NFS_V4_1 */
 840
 841 static const umode_t nfs_type2fmt[] = {
 842         [NF4BAD] = 0,
 843         [NF4REG] = S_IFREG,
 844         [NF4DIR] = S_IFDIR,
 845         [NF4BLK] = S_IFBLK,
 846         [NF4CHR] = S_IFCHR,
 847         [NF4LNK] = S_IFLNK,
 848         [NF4SOCK] = S_IFSOCK,
 849         [NF4FIFO] = S_IFIFO,
 850         [NF4ATTRDIR] = 0,
 851         [NF4NAMEDATTR] = 0,
 852 };
 853
 854 struct compound_hdr {
 855         int32_t         status;
 856         uint32_t        nops;
 857         __be32 *        nops_p;
 858         uint32_t        taglen;
 859         char *          tag;
 860         uint32_t        replen;         /* expected reply words */
 861         u32             minorversion;
 862 };
 863
 864 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
 865 {
 866         __be32 *p = xdr_reserve_space(xdr, nbytes);
 867         BUG_ON(!p);
 868         return p;
 869 }
 870
 871 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 872 {
 873         __be32 *p;
 874
 875         p = xdr_reserve_space(xdr, 4 + len);
 876         BUG_ON(p == NULL);
 877         xdr_encode_opaque(p, str, len);
 878 }
 879
 880 static void encode_compound_hdr(struct xdr_stream *xdr,
 881                                 struct rpc_rqst *req,
 882                                 struct compound_hdr *hdr)
 883 {
 884         __be32 *p;
 885         struct rpc_auth *auth = req->rq_cred->cr_auth;
 886
 887         /* initialize running count of expected bytes in reply.
 888          * NOTE: the replied tag SHOULD be the same is the one sent,
 889          * but this is not required as a MUST for the server to do so. */
 890         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
 891
 892         dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
 893         BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
 894         p = reserve_space(xdr, 4 + hdr->taglen + 8);
 895         p = xdr_encode_opaque(p, hdr->tag, hdr->taglen);
 896         *p++ = cpu_to_be32(hdr->minorversion);
 897         hdr->nops_p = p;
 898         *p = cpu_to_be32(hdr->nops);
 899 }
 900
 901 static void encode_nops(struct compound_hdr *hdr)
 902 {
 903         BUG_ON(hdr->nops > NFS4_MAX_OPS);
 904         *hdr->nops_p = htonl(hdr->nops);
 905 }
 906
 907 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 908 {
 909         __be32 *p;
 910
 911         p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
 912         BUG_ON(p == NULL);
 913         xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
 914 }
 915
 916 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
 917 {
 918         char owner_name[IDMAP_NAMESZ];
 919         char owner_group[IDMAP_NAMESZ];
 920         int owner_namelen = 0;
 921         int owner_grouplen = 0;
 922         __be32 *p;
 923         __be32 *q;
 924         int len;
 925         uint32_t bmval0 = 0;
 926         uint32_t bmval1 = 0;
 927
 928         /*
 929          * We reserve enough space to write the entire attribute buffer at once.
 930          * In the worst-case, this would be
 931          *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
 932          *          = 36 bytes, plus any contribution from variable-length fields
 933          *            such as owner/group.
 934          */
 935         len = 16;
 936
 937         /* Sigh */
 938         if (iap->ia_valid & ATTR_SIZE)
 939                 len += 8;
 940         if (iap->ia_valid & ATTR_MODE)
 941                 len += 4;
 942         if (iap->ia_valid & ATTR_UID) {
 943                 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
 944                 if (owner_namelen < 0) {
 945                         dprintk("nfs: couldn't resolve uid %d to string\n",
 946                                         iap->ia_uid);
 947                         /* XXX */
 948                         strcpy(owner_name, "nobody");
 949                         owner_namelen = sizeof("nobody") - 1;
 950                         /* goto out; */
 951                 }
 952                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
 953         }
 954         if (iap->ia_valid & ATTR_GID) {
 955                 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
 956                 if (owner_grouplen < 0) {
 957                         dprintk("nfs: couldn't resolve gid %d to string\n",
 958                                         iap->ia_gid);
 959                         strcpy(owner_group, "nobody");
 960                         owner_grouplen = sizeof("nobody") - 1;
 961                         /* goto out; */
 962                 }
 963                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
 964         }
 965         if (iap->ia_valid & ATTR_ATIME_SET)
 966                 len += 16;
 967         else if (iap->ia_valid & ATTR_ATIME)
 968                 len += 4;
 969         if (iap->ia_valid & ATTR_MTIME_SET)
 970                 len += 16;
 971         else if (iap->ia_valid & ATTR_MTIME)
 972                 len += 4;
 973         p = reserve_space(xdr, len);
 974
 975         /*
 976          * We write the bitmap length now, but leave the bitmap and the attribute
 977          * buffer length to be backfilled at the end of this routine.
 978          */
 979         *p++ = cpu_to_be32(2);
 980         q = p;
 981         p += 3;
 982
 983         if (iap->ia_valid & ATTR_SIZE) {
 984                 bmval0 |= FATTR4_WORD0_SIZE;
 985                 p = xdr_encode_hyper(p, iap->ia_size);
 986         }
 987         if (iap->ia_valid & ATTR_MODE) {
 988                 bmval1 |= FATTR4_WORD1_MODE;
 989                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
 990         }
 991         if (iap->ia_valid & ATTR_UID) {
 992                 bmval1 |= FATTR4_WORD1_OWNER;
 993                 p = xdr_encode_opaque(p, owner_name, owner_namelen);
 994         }
 995         if (iap->ia_valid & ATTR_GID) {
 996                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
 997                 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
 998         }
 999         if (iap->ia_valid & ATTR_ATIME_SET) {
1000                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
1001                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1002                 *p++ = cpu_to_be32(0);
1003                 *p++ = cpu_to_be32(iap->ia_atime.tv_sec);
1004                 *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
1005         }
1006         else if (iap->ia_valid & ATTR_ATIME) {
1007                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
1008                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1009         }
1010         if (iap->ia_valid & ATTR_MTIME_SET) {
1011                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
1012                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1013                 *p++ = cpu_to_be32(0);
1014                 *p++ = cpu_to_be32(iap->ia_mtime.tv_sec);
1015                 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1016         }
1017         else if (iap->ia_valid & ATTR_MTIME) {
1018                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
1019                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1020         }
1021
1022         /*
1023          * Now we backfill the bitmap and the attribute buffer length.
1024          */
1025         if (len != ((char *)p - (char *)q) + 4) {
1026                 printk(KERN_ERR "nfs: Attr length error, %u != %Zu\n",
1027                                 len, ((char *)p - (char *)q) + 4);
1028                 BUG();
1029         }
1030         len = (char *)p - (char *)q - 12;
1031         *q++ = htonl(bmval0);
1032         *q++ = htonl(bmval1);
1033         *q = htonl(len);
1034
1035 /* out: */
1036 }
1037
1038 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1039 {
1040         __be32 *p;
1041
1042         p = reserve_space(xdr, 8);
1043         *p++ = cpu_to_be32(OP_ACCESS);
1044         *p = cpu_to_be32(access);
1045         hdr->nops++;
1046         hdr->replen += decode_access_maxsz;
1047 }
1048
1049 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1050 {
1051         __be32 *p;
1052
1053         p = reserve_space(xdr, 8+NFS4_STATEID_SIZE);
1054         *p++ = cpu_to_be32(OP_CLOSE);
1055         *p++ = cpu_to_be32(arg->seqid->sequence->counter);
1056         xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1057         hdr->nops++;
1058         hdr->replen += decode_close_maxsz;
1059 }
1060
1061 static void encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1062 {
1063         __be32 *p;
1064
1065         p = reserve_space(xdr, 16);
1066         *p++ = cpu_to_be32(OP_COMMIT);
1067         p = xdr_encode_hyper(p, args->offset);
1068         *p = cpu_to_be32(args->count);
1069         hdr->nops++;
1070         hdr->replen += decode_commit_maxsz;
1071 }
1072
1073 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1074 {
1075         __be32 *p;
1076
1077         p = reserve_space(xdr, 8);
1078         *p++ = cpu_to_be32(OP_CREATE);
1079         *p = cpu_to_be32(create->ftype);
1080
1081         switch (create->ftype) {
1082         case NF4LNK:
1083                 p = reserve_space(xdr, 4);
1084                 *p = cpu_to_be32(create->u.symlink.len);
1085                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
1086                 break;
1087
1088         case NF4BLK: case NF4CHR:
1089                 p = reserve_space(xdr, 8);
1090                 *p++ = cpu_to_be32(create->u.device.specdata1);
1091                 *p = cpu_to_be32(create->u.device.specdata2);
1092                 break;
1093
1094         default:
1095                 break;
1096         }
1097
1098         encode_string(xdr, create->name->len, create->name->name);
1099         hdr->nops++;
1100         hdr->replen += decode_create_maxsz;
1101
1102         encode_attrs(xdr, create->attrs, create->server);
1103 }
1104
1105 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1106 {
1107         __be32 *p;
1108
1109         p = reserve_space(xdr, 12);
1110         *p++ = cpu_to_be32(OP_GETATTR);
1111         *p++ = cpu_to_be32(1);
1112         *p = cpu_to_be32(bitmap);
1113         hdr->nops++;
1114         hdr->replen += decode_getattr_maxsz;
1115 }
1116
1117 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1118 {
1119         __be32 *p;
1120
1121         p = reserve_space(xdr, 16);
1122         *p++ = cpu_to_be32(OP_GETATTR);
1123         *p++ = cpu_to_be32(2);
1124         *p++ = cpu_to_be32(bm0);
1125         *p = cpu_to_be32(bm1);
1126         hdr->nops++;
1127         hdr->replen += decode_getattr_maxsz;
1128 }
1129
1130 static void
1131 encode_getattr_three(struct xdr_stream *xdr,
1132                      uint32_t bm0, uint32_t bm1, uint32_t bm2,
1133                      struct compound_hdr *hdr)
1134 {
1135         __be32 *p;
1136
1137         p = reserve_space(xdr, 4);
1138         *p = cpu_to_be32(OP_GETATTR);
1139         if (bm2) {
1140                 p = reserve_space(xdr, 16);
1141                 *p++ = cpu_to_be32(3);
1142                 *p++ = cpu_to_be32(bm0);
1143                 *p++ = cpu_to_be32(bm1);
1144                 *p = cpu_to_be32(bm2);
1145         } else if (bm1) {
1146                 p = reserve_space(xdr, 12);
1147                 *p++ = cpu_to_be32(2);
1148                 *p++ = cpu_to_be32(bm0);
1149                 *p = cpu_to_be32(bm1);
1150         } else {
1151                 p = reserve_space(xdr, 8);
1152                 *p++ = cpu_to_be32(1);
1153                 *p = cpu_to_be32(bm0);
1154         }
1155         hdr->nops++;
1156         hdr->replen += decode_getattr_maxsz;
1157 }
1158
1159 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1160 {
1161         encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1162                            bitmask[1] & nfs4_fattr_bitmap[1], hdr);
1163 }
1164
1165 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1166 {
1167         encode_getattr_three(xdr,
1168                              bitmask[0] & nfs4_fsinfo_bitmap[0],
1169                              bitmask[1] & nfs4_fsinfo_bitmap[1],
1170                              bitmask[2] & nfs4_fsinfo_bitmap[2],
1171                              hdr);
1172 }
1173
1174 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1175 {
1176         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1177                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1178 }
1179
1180 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1181 {
1182         __be32 *p;
1183
1184         p = reserve_space(xdr, 4);
1185         *p = cpu_to_be32(OP_GETFH);
1186         hdr->nops++;
1187         hdr->replen += decode_getfh_maxsz;
1188 }
1189
1190 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1191 {
1192         __be32 *p;
1193
1194         p = reserve_space(xdr, 8 + name->len);
1195         *p++ = cpu_to_be32(OP_LINK);
1196         xdr_encode_opaque(p, name->name, name->len);
1197         hdr->nops++;
1198         hdr->replen += decode_link_maxsz;
1199 }
1200
1201 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1202 {
1203         if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
1204                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1205         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1206 }
1207
1208 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1209 {
1210         if (fl->fl_end == OFFSET_MAX)
1211                 return ~(uint64_t)0;
1212         return fl->fl_end - fl->fl_start + 1;
1213 }
1214
1215 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1216 {
1217         __be32 *p;
1218
1219         p = reserve_space(xdr, 32);
1220         p = xdr_encode_hyper(p, lowner->clientid);
1221         *p++ = cpu_to_be32(20);
1222         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1223         *p++ = cpu_to_be32(lowner->s_dev);
1224         xdr_encode_hyper(p, lowner->id);
1225 }
1226
1227 /*
1228  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1229  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1230  */
1231 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1232 {
1233         __be32 *p;
1234
1235         p = reserve_space(xdr, 32);
1236         *p++ = cpu_to_be32(OP_LOCK);
1237         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1238         *p++ = cpu_to_be32(args->reclaim);
1239         p = xdr_encode_hyper(p, args->fl->fl_start);
1240         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1241         *p = cpu_to_be32(args->new_lock_owner);
1242         if (args->new_lock_owner){
1243                 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1244                 *p++ = cpu_to_be32(args->open_seqid->sequence->counter);
1245                 p = xdr_encode_opaque_fixed(p, args->open_stateid->data, NFS4_STATEID_SIZE);
1246                 *p++ = cpu_to_be32(args->lock_seqid->sequence->counter);
1247                 encode_lockowner(xdr, &args->lock_owner);
1248         }
1249         else {
1250                 p = reserve_space(xdr, NFS4_STATEID_SIZE+4);
1251                 p = xdr_encode_opaque_fixed(p, args->lock_stateid->data, NFS4_STATEID_SIZE);
1252                 *p = cpu_to_be32(args->lock_seqid->sequence->counter);
1253         }
1254         hdr->nops++;
1255         hdr->replen += decode_lock_maxsz;
1256 }
1257
1258 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1259 {
1260         __be32 *p;
1261
1262         p = reserve_space(xdr, 24);
1263         *p++ = cpu_to_be32(OP_LOCKT);
1264         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1265         p = xdr_encode_hyper(p, args->fl->fl_start);
1266         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1267         encode_lockowner(xdr, &args->lock_owner);
1268         hdr->nops++;
1269         hdr->replen += decode_lockt_maxsz;
1270 }
1271
1272 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1273 {
1274         __be32 *p;
1275
1276         p = reserve_space(xdr, 12+NFS4_STATEID_SIZE+16);
1277         *p++ = cpu_to_be32(OP_LOCKU);
1278         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1279         *p++ = cpu_to_be32(args->seqid->sequence->counter);
1280         p = xdr_encode_opaque_fixed(p, args->stateid->data, NFS4_STATEID_SIZE);
1281         p = xdr_encode_hyper(p, args->fl->fl_start);
1282         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1283         hdr->nops++;
1284         hdr->replen += decode_locku_maxsz;
1285 }
1286
1287 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1288 {
1289         __be32 *p;
1290
1291         p = reserve_space(xdr, 4);
1292         *p = cpu_to_be32(OP_RELEASE_LOCKOWNER);
1293         encode_lockowner(xdr, lowner);
1294         hdr->nops++;
1295         hdr->replen += decode_release_lockowner_maxsz;
1296 }
1297
1298 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1299 {
1300         int len = name->len;
1301         __be32 *p;
1302
1303         p = reserve_space(xdr, 8 + len);
1304         *p++ = cpu_to_be32(OP_LOOKUP);
1305         xdr_encode_opaque(p, name->name, len);
1306         hdr->nops++;
1307         hdr->replen += decode_lookup_maxsz;
1308 }
1309
1310 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1311 {
1312         __be32 *p;
1313
1314         p = reserve_space(xdr, 8);
1315         switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1316         case FMODE_READ:
1317                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1318                 break;
1319         case FMODE_WRITE:
1320                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1321                 break;
1322         case FMODE_READ|FMODE_WRITE:
1323                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1324                 break;
1325         default:
1326                 *p++ = cpu_to_be32(0);
1327         }
1328         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1329 }
1330
1331 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1332 {
1333         __be32 *p;
1334  /*
1335  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1336  * owner 4 = 32
1337  */
1338         p = reserve_space(xdr, 8);
1339         *p++ = cpu_to_be32(OP_OPEN);
1340         *p = cpu_to_be32(arg->seqid->sequence->counter);
1341         encode_share_access(xdr, arg->fmode);
1342         p = reserve_space(xdr, 32);
1343         p = xdr_encode_hyper(p, arg->clientid);
1344         *p++ = cpu_to_be32(20);
1345         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1346         *p++ = cpu_to_be32(arg->server->s_dev);
1347         xdr_encode_hyper(p, arg->id);
1348 }
1349
1350 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1351 {
1352         __be32 *p;
1353         struct nfs_client *clp;
1354
1355         p = reserve_space(xdr, 4);
1356         switch(arg->open_flags & O_EXCL) {
1357         case 0:
1358                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1359                 encode_attrs(xdr, arg->u.attrs, arg->server);
1360                 break;
1361         default:
1362                 clp = arg->server->nfs_client;
1363                 if (clp->cl_mvops->minor_version > 0) {
1364                         if (nfs4_has_persistent_session(clp)) {
1365                                 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1366                                 encode_attrs(xdr, arg->u.attrs, arg->server);
1367                         } else {
1368                                 struct iattr dummy;
1369
1370                                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1371                                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1372                                 dummy.ia_valid = 0;
1373                                 encode_attrs(xdr, &dummy, arg->server);
1374                         }
1375                 } else {
1376                         *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1377                         encode_nfs4_verifier(xdr, &arg->u.verifier);
1378                 }
1379         }
1380 }
1381
1382 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1383 {
1384         __be32 *p;
1385
1386         p = reserve_space(xdr, 4);
1387         switch (arg->open_flags & O_CREAT) {
1388         case 0:
1389                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1390                 break;
1391         default:
1392                 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1393                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1394                 encode_createmode(xdr, arg);
1395         }
1396 }
1397
1398 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1399 {
1400         __be32 *p;
1401
1402         p = reserve_space(xdr, 4);
1403         switch (delegation_type) {
1404         case 0:
1405                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1406                 break;
1407         case FMODE_READ:
1408                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1409                 break;
1410         case FMODE_WRITE|FMODE_READ:
1411                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1412                 break;
1413         default:
1414                 BUG();
1415         }
1416 }
1417
1418 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1419 {
1420         __be32 *p;
1421
1422         p = reserve_space(xdr, 4);
1423         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1424         encode_string(xdr, name->len, name->name);
1425 }
1426
1427 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1428 {
1429         __be32 *p;
1430
1431         p = reserve_space(xdr, 4);
1432         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1433         encode_delegation_type(xdr, type);
1434 }
1435
1436 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1437 {
1438         __be32 *p;
1439
1440         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1441         *p++ = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1442         xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1443         encode_string(xdr, name->len, name->name);
1444 }
1445
1446 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1447 {
1448         encode_openhdr(xdr, arg);
1449         encode_opentype(xdr, arg);
1450         switch (arg->claim) {
1451         case NFS4_OPEN_CLAIM_NULL:
1452                 encode_claim_null(xdr, arg->name);
1453                 break;
1454         case NFS4_OPEN_CLAIM_PREVIOUS:
1455                 encode_claim_previous(xdr, arg->u.delegation_type);
1456                 break;
1457         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1458                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1459                 break;
1460         default:
1461                 BUG();
1462         }
1463         hdr->nops++;
1464         hdr->replen += decode_open_maxsz;
1465 }
1466
1467 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1468 {
1469         __be32 *p;
1470
1471         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1472         *p++ = cpu_to_be32(OP_OPEN_CONFIRM);
1473         p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1474         *p = cpu_to_be32(arg->seqid->sequence->counter);
1475         hdr->nops++;
1476         hdr->replen += decode_open_confirm_maxsz;
1477 }
1478
1479 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1480 {
1481         __be32 *p;
1482
1483         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1484         *p++ = cpu_to_be32(OP_OPEN_DOWNGRADE);
1485         p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1486         *p = cpu_to_be32(arg->seqid->sequence->counter);
1487         encode_share_access(xdr, arg->fmode);
1488         hdr->nops++;
1489         hdr->replen += decode_open_downgrade_maxsz;
1490 }
1491
1492 static void
1493 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1494 {
1495         int len = fh->size;
1496         __be32 *p;
1497
1498         p = reserve_space(xdr, 8 + len);
1499         *p++ = cpu_to_be32(OP_PUTFH);
1500         xdr_encode_opaque(p, fh->data, len);
1501         hdr->nops++;
1502         hdr->replen += decode_putfh_maxsz;
1503 }
1504
1505 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1506 {
1507         __be32 *p;
1508
1509         p = reserve_space(xdr, 4);
1510         *p = cpu_to_be32(OP_PUTROOTFH);
1511         hdr->nops++;
1512         hdr->replen += decode_putrootfh_maxsz;
1513 }
1514
1515 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx, const struct nfs_lock_context *l_ctx, int zero_seqid)
1516 {
1517         nfs4_stateid stateid;
1518         __be32 *p;
1519
1520         p = reserve_space(xdr, NFS4_STATEID_SIZE);
1521         if (ctx->state != NULL) {
1522                 nfs4_copy_stateid(&stateid, ctx->state, l_ctx->lockowner, l_ctx->pid);
1523                 if (zero_seqid)
1524                         stateid.stateid.seqid = 0;
1525                 xdr_encode_opaque_fixed(p, stateid.data, NFS4_STATEID_SIZE);
1526         } else
1527                 xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1528 }
1529
1530 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1531 {
1532         __be32 *p;
1533
1534         p = reserve_space(xdr, 4);
1535         *p = cpu_to_be32(OP_READ);
1536
1537         encode_stateid(xdr, args->context, args->lock_context,
1538                        hdr->minorversion);
1539
1540         p = reserve_space(xdr, 12);
1541         p = xdr_encode_hyper(p, args->offset);
1542         *p = cpu_to_be32(args->count);
1543         hdr->nops++;
1544         hdr->replen += decode_read_maxsz;
1545 }
1546
1547 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1548 {
1549         uint32_t attrs[2] = {
1550                 FATTR4_WORD0_RDATTR_ERROR,
1551                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1552         };
1553         uint32_t dircount = readdir->count >> 1;
1554         __be32 *p;
1555
1556         if (readdir->plus) {
1557                 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1558                         FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1559                 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1560                         FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1561                         FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1562                         FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1563                 dircount >>= 1;
1564         }
1565         /* Use mounted_on_fileid only if the server supports it */
1566         if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1567                 attrs[0] |= FATTR4_WORD0_FILEID;
1568
1569         p = reserve_space(xdr, 12+NFS4_VERIFIER_SIZE+20);
1570         *p++ = cpu_to_be32(OP_READDIR);
1571         p = xdr_encode_hyper(p, readdir->cookie);
1572         p = xdr_encode_opaque_fixed(p, readdir->verifier.data, NFS4_VERIFIER_SIZE);
1573         *p++ = cpu_to_be32(dircount);
1574         *p++ = cpu_to_be32(readdir->count);
1575         *p++ = cpu_to_be32(2);
1576
1577         *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1578         *p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1579         hdr->nops++;
1580         hdr->replen += decode_readdir_maxsz;
1581         dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1582                         __func__,
1583                         (unsigned long long)readdir->cookie,
1584                         ((u32 *)readdir->verifier.data)[0],
1585                         ((u32 *)readdir->verifier.data)[1],
1586                         attrs[0] & readdir->bitmask[0],
1587                         attrs[1] & readdir->bitmask[1]);
1588 }
1589
1590 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1591 {
1592         __be32 *p;
1593
1594         p = reserve_space(xdr, 4);
1595         *p = cpu_to_be32(OP_READLINK);
1596         hdr->nops++;
1597         hdr->replen += decode_readlink_maxsz;
1598 }
1599
1600 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1601 {
1602         __be32 *p;
1603
1604         p = reserve_space(xdr, 8 + name->len);
1605         *p++ = cpu_to_be32(OP_REMOVE);
1606         xdr_encode_opaque(p, name->name, name->len);
1607         hdr->nops++;
1608         hdr->replen += decode_remove_maxsz;
1609 }
1610
1611 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1612 {
1613         __be32 *p;
1614
1615         p = reserve_space(xdr, 4);
1616         *p = cpu_to_be32(OP_RENAME);
1617         encode_string(xdr, oldname->len, oldname->name);
1618         encode_string(xdr, newname->len, newname->name);
1619         hdr->nops++;
1620         hdr->replen += decode_rename_maxsz;
1621 }
1622
1623 static void encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid, struct compound_hdr *hdr)
1624 {
1625         __be32 *p;
1626
1627         p = reserve_space(xdr, 12);
1628         *p++ = cpu_to_be32(OP_RENEW);
1629         xdr_encode_hyper(p, client_stateid->cl_clientid);
1630         hdr->nops++;
1631         hdr->replen += decode_renew_maxsz;
1632 }
1633
1634 static void
1635 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1636 {
1637         __be32 *p;
1638
1639         p = reserve_space(xdr, 4);
1640         *p = cpu_to_be32(OP_RESTOREFH);
1641         hdr->nops++;
1642         hdr->replen += decode_restorefh_maxsz;
1643 }
1644
1645 static void
1646 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1647 {
1648         __be32 *p;
1649
1650         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1651         *p++ = cpu_to_be32(OP_SETATTR);
1652         xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1653         p = reserve_space(xdr, 2*4);
1654         *p++ = cpu_to_be32(1);
1655         *p = cpu_to_be32(FATTR4_WORD0_ACL);
1656         BUG_ON(arg->acl_len % 4);
1657         p = reserve_space(xdr, 4);
1658         *p = cpu_to_be32(arg->acl_len);
1659         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1660         hdr->nops++;
1661         hdr->replen += decode_setacl_maxsz;
1662 }
1663
1664 static void
1665 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1666 {
1667         __be32 *p;
1668
1669         p = reserve_space(xdr, 4);
1670         *p = cpu_to_be32(OP_SAVEFH);
1671         hdr->nops++;
1672         hdr->replen += decode_savefh_maxsz;
1673 }
1674
1675 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1676 {
1677         __be32 *p;
1678
1679         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1680         *p++ = cpu_to_be32(OP_SETATTR);
1681         xdr_encode_opaque_fixed(p, arg->stateid.data, NFS4_STATEID_SIZE);
1682         hdr->nops++;
1683         hdr->replen += decode_setattr_maxsz;
1684         encode_attrs(xdr, arg->iap, server);
1685 }
1686
1687 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1688 {
1689         __be32 *p;
1690
1691         p = reserve_space(xdr, 4 + NFS4_VERIFIER_SIZE);
1692         *p++ = cpu_to_be32(OP_SETCLIENTID);
1693         xdr_encode_opaque_fixed(p, setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
1694
1695         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1696         p = reserve_space(xdr, 4);
1697         *p = cpu_to_be32(setclientid->sc_prog);
1698         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1699         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1700         p = reserve_space(xdr, 4);
1701         *p = cpu_to_be32(setclientid->sc_cb_ident);
1702         hdr->nops++;
1703         hdr->replen += decode_setclientid_maxsz;
1704 }
1705
1706 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1707 {
1708         __be32 *p;
1709
1710         p = reserve_space(xdr, 12 + NFS4_VERIFIER_SIZE);
1711         *p++ = cpu_to_be32(OP_SETCLIENTID_CONFIRM);
1712         p = xdr_encode_hyper(p, arg->clientid);
1713         xdr_encode_opaque_fixed(p, arg->confirm.data, NFS4_VERIFIER_SIZE);
1714         hdr->nops++;
1715         hdr->replen += decode_setclientid_confirm_maxsz;
1716 }
1717
1718 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1719 {
1720         __be32 *p;
1721
1722         p = reserve_space(xdr, 4);
1723         *p = cpu_to_be32(OP_WRITE);
1724
1725         encode_stateid(xdr, args->context, args->lock_context,
1726                        hdr->minorversion);
1727
1728         p = reserve_space(xdr, 16);
1729         p = xdr_encode_hyper(p, args->offset);
1730         *p++ = cpu_to_be32(args->stable);
1731         *p = cpu_to_be32(args->count);
1732
1733         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1734         hdr->nops++;
1735         hdr->replen += decode_write_maxsz;
1736 }
1737
1738 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1739 {
1740         __be32 *p;
1741
1742         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1743
1744         *p++ = cpu_to_be32(OP_DELEGRETURN);
1745         xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1746         hdr->nops++;
1747         hdr->replen += decode_delegreturn_maxsz;
1748 }
1749
1750 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1751 {
1752         int len = name->len;
1753         __be32 *p;
1754
1755         p = reserve_space(xdr, 8 + len);
1756         *p++ = cpu_to_be32(OP_SECINFO);
1757         xdr_encode_opaque(p, name->name, len);
1758         hdr->nops++;
1759         hdr->replen += decode_secinfo_maxsz;
1760 }
1761
1762 #if defined(CONFIG_NFS_V4_1)
1763 /* NFSv4.1 operations */
1764 static void encode_exchange_id(struct xdr_stream *xdr,
1765                                struct nfs41_exchange_id_args *args,
1766                                struct compound_hdr *hdr)
1767 {
1768         __be32 *p;
1769
1770         p = reserve_space(xdr, 4 + sizeof(args->verifier->data));
1771         *p++ = cpu_to_be32(OP_EXCHANGE_ID);
1772         xdr_encode_opaque_fixed(p, args->verifier->data, sizeof(args->verifier->data));
1773
1774         encode_string(xdr, args->id_len, args->id);
1775
1776         p = reserve_space(xdr, 12);
1777         *p++ = cpu_to_be32(args->flags);
1778         *p++ = cpu_to_be32(0);  /* zero length state_protect4_a */
1779         *p = cpu_to_be32(0);    /* zero length implementation id array */
1780         hdr->nops++;
1781         hdr->replen += decode_exchange_id_maxsz;
1782 }
1783
1784 static void encode_create_session(struct xdr_stream *xdr,
1785                                   struct nfs41_create_session_args *args,
1786                                   struct compound_hdr *hdr)
1787 {
1788         __be32 *p;
1789         char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1790         uint32_t len;
1791         struct nfs_client *clp = args->client;
1792         u32 max_resp_sz_cached;
1793
1794         /*
1795          * Assumes OPEN is the biggest non-idempotent compound.
1796          * 2 is the verifier.
1797          */
1798         max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1799                               RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1800
1801         len = scnprintf(machine_name, sizeof(machine_name), "%s",
1802                         clp->cl_ipaddr);
1803
1804         p = reserve_space(xdr, 20 + 2*28 + 20 + len + 12);
1805         *p++ = cpu_to_be32(OP_CREATE_SESSION);
1806         p = xdr_encode_hyper(p, clp->cl_clientid);
1807         *p++ = cpu_to_be32(clp->cl_seqid);                      /*Sequence id */
1808         *p++ = cpu_to_be32(args->flags);                        /*flags */
1809
1810         /* Fore Channel */
1811         *p++ = cpu_to_be32(0);                          /* header padding size */
1812         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1813         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1814         *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1815         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1816         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1817         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1818
1819         /* Back Channel */
1820         *p++ = cpu_to_be32(0);                          /* header padding size */
1821         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1822         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1823         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1824         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1825         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1826         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1827
1828         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1829         *p++ = cpu_to_be32(1);
1830         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1831
1832         /* authsys_parms rfc1831 */
1833         *p++ = cpu_to_be32((u32)clp->cl_boot_time.tv_nsec);     /* stamp */
1834         p = xdr_encode_opaque(p, machine_name, len);
1835         *p++ = cpu_to_be32(0);                          /* UID */
1836         *p++ = cpu_to_be32(0);                          /* GID */
1837         *p = cpu_to_be32(0);                            /* No more gids */
1838         hdr->nops++;
1839         hdr->replen += decode_create_session_maxsz;
1840 }
1841
1842 static void encode_destroy_session(struct xdr_stream *xdr,
1843                                    struct nfs4_session *session,
1844                                    struct compound_hdr *hdr)
1845 {
1846         __be32 *p;
1847         p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN);
1848         *p++ = cpu_to_be32(OP_DESTROY_SESSION);
1849         xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1850         hdr->nops++;
1851         hdr->replen += decode_destroy_session_maxsz;
1852 }
1853
1854 static void encode_reclaim_complete(struct xdr_stream *xdr,
1855                                     struct nfs41_reclaim_complete_args *args,
1856                                     struct compound_hdr *hdr)
1857 {
1858         __be32 *p;
1859
1860         p = reserve_space(xdr, 8);
1861         *p++ = cpu_to_be32(OP_RECLAIM_COMPLETE);
1862         *p++ = cpu_to_be32(args->one_fs);
1863         hdr->nops++;
1864         hdr->replen += decode_reclaim_complete_maxsz;
1865 }
1866 #endif /* CONFIG_NFS_V4_1 */
1867
1868 static void encode_sequence(struct xdr_stream *xdr,
1869                             const struct nfs4_sequence_args *args,
1870                             struct compound_hdr *hdr)
1871 {
1872 #if defined(CONFIG_NFS_V4_1)
1873         struct nfs4_session *session = args->sa_session;
1874         struct nfs4_slot_table *tp;
1875         struct nfs4_slot *slot;
1876         __be32 *p;
1877
1878         if (!session)
1879                 return;
1880
1881         tp = &session->fc_slot_table;
1882
1883         WARN_ON(args->sa_slotid == NFS4_MAX_SLOT_TABLE);
1884         slot = tp->slots + args->sa_slotid;
1885
1886         p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN + 16);
1887         *p++ = cpu_to_be32(OP_SEQUENCE);
1888
1889         /*
1890          * Sessionid + seqid + slotid + max slotid + cache_this
1891          */
1892         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1893                 "max_slotid=%d cache_this=%d\n",
1894                 __func__,
1895                 ((u32 *)session->sess_id.data)[0],
1896                 ((u32 *)session->sess_id.data)[1],
1897                 ((u32 *)session->sess_id.data)[2],
1898                 ((u32 *)session->sess_id.data)[3],
1899                 slot->seq_nr, args->sa_slotid,
1900                 tp->highest_used_slotid, args->sa_cache_this);
1901         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1902         *p++ = cpu_to_be32(slot->seq_nr);
1903         *p++ = cpu_to_be32(args->sa_slotid);
1904         *p++ = cpu_to_be32(tp->highest_used_slotid);
1905         *p = cpu_to_be32(args->sa_cache_this);
1906         hdr->nops++;
1907         hdr->replen += decode_sequence_maxsz;
1908 #endif /* CONFIG_NFS_V4_1 */
1909 }
1910
1911 #ifdef CONFIG_NFS_V4_1
1912 static void
1913 encode_getdevicelist(struct xdr_stream *xdr,
1914                      const struct nfs4_getdevicelist_args *args,
1915                      struct compound_hdr *hdr)
1916 {
1917         __be32 *p;
1918         nfs4_verifier dummy = {
1919                 .data = "dummmmmy",
1920         };
1921
1922         p = reserve_space(xdr, 20);
1923         *p++ = cpu_to_be32(OP_GETDEVICELIST);
1924         *p++ = cpu_to_be32(args->layoutclass);
1925         *p++ = cpu_to_be32(NFS4_PNFS_GETDEVLIST_MAXNUM);
1926         xdr_encode_hyper(p, 0ULL);                          /* cookie */
1927         encode_nfs4_verifier(xdr, &dummy);
1928         hdr->nops++;
1929         hdr->replen += decode_getdevicelist_maxsz;
1930 }
1931
1932 static void
1933 encode_getdeviceinfo(struct xdr_stream *xdr,
1934                      const struct nfs4_getdeviceinfo_args *args,
1935                      struct compound_hdr *hdr)
1936 {
1937         __be32 *p;
1938
1939         p = reserve_space(xdr, 16 + NFS4_DEVICEID4_SIZE);
1940         *p++ = cpu_to_be32(OP_GETDEVICEINFO);
1941         p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1942                                     NFS4_DEVICEID4_SIZE);
1943         *p++ = cpu_to_be32(args->pdev->layout_type);
1944         *p++ = cpu_to_be32(args->pdev->pglen);          /* gdia_maxcount */
1945         *p++ = cpu_to_be32(0);                          /* bitmap length 0 */
1946         hdr->nops++;
1947         hdr->replen += decode_getdeviceinfo_maxsz;
1948 }
1949
1950 static void
1951 encode_layoutget(struct xdr_stream *xdr,
1952                       const struct nfs4_layoutget_args *args,
1953                       struct compound_hdr *hdr)
1954 {
1955         __be32 *p;
1956
1957         p = reserve_space(xdr, 44 + NFS4_STATEID_SIZE);
1958         *p++ = cpu_to_be32(OP_LAYOUTGET);
1959         *p++ = cpu_to_be32(0);     /* Signal layout available */
1960         *p++ = cpu_to_be32(args->type);
1961         *p++ = cpu_to_be32(args->range.iomode);
1962         p = xdr_encode_hyper(p, args->range.offset);
1963         p = xdr_encode_hyper(p, args->range.length);
1964         p = xdr_encode_hyper(p, args->minlength);
1965         p = xdr_encode_opaque_fixed(p, &args->stateid.data, NFS4_STATEID_SIZE);
1966         *p = cpu_to_be32(args->maxcount);
1967
1968         dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1969                 __func__,
1970                 args->type,
1971                 args->range.iomode,
1972                 (unsigned long)args->range.offset,
1973                 (unsigned long)args->range.length,
1974                 args->maxcount);
1975         hdr->nops++;
1976         hdr->replen += decode_layoutget_maxsz;
1977 }
1978
1979 static int
1980 encode_layoutcommit(struct xdr_stream *xdr,
1981                     struct inode *inode,
1982                     const struct nfs4_layoutcommit_args *args,
1983                     struct compound_hdr *hdr)
1984 {
1985         __be32 *p;
1986
1987         dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1988                 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1989
1990         p = reserve_space(xdr, 44 + NFS4_STATEID_SIZE);
1991         *p++ = cpu_to_be32(OP_LAYOUTCOMMIT);
1992         /* Only whole file layouts */
1993         p = xdr_encode_hyper(p, 0); /* offset */
1994         p = xdr_encode_hyper(p, args->lastbytewritten + 1);     /* length */
1995         *p++ = cpu_to_be32(0); /* reclaim */
1996         p = xdr_encode_opaque_fixed(p, args->stateid.data, NFS4_STATEID_SIZE);
1997         *p++ = cpu_to_be32(1); /* newoffset = TRUE */
1998         p = xdr_encode_hyper(p, args->lastbytewritten);
1999         *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
2000         *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
2001
2002         if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit)
2003                 NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
2004                         NFS_I(inode)->layout, xdr, args);
2005         else {
2006                 p = reserve_space(xdr, 4);
2007                 *p = cpu_to_be32(0); /* no layout-type payload */
2008         }
2009
2010         hdr->nops++;
2011         hdr->replen += decode_layoutcommit_maxsz;
2012         return 0;
2013 }
2014
2015 static void
2016 encode_layoutreturn(struct xdr_stream *xdr,
2017                     const struct nfs4_layoutreturn_args *args,
2018                     struct compound_hdr *hdr)
2019 {
2020         __be32 *p;
2021
2022         p = reserve_space(xdr, 20);
2023         *p++ = cpu_to_be32(OP_LAYOUTRETURN);
2024         *p++ = cpu_to_be32(0);          /* reclaim. always 0 for now */
2025         *p++ = cpu_to_be32(args->layout_type);
2026         *p++ = cpu_to_be32(IOMODE_ANY);
2027         *p = cpu_to_be32(RETURN_FILE);
2028         p = reserve_space(xdr, 16 + NFS4_STATEID_SIZE);
2029         p = xdr_encode_hyper(p, 0);
2030         p = xdr_encode_hyper(p, NFS4_MAX_UINT64);
2031         spin_lock(&args->inode->i_lock);
2032         xdr_encode_opaque_fixed(p, &args->stateid.data, NFS4_STATEID_SIZE);
2033         spin_unlock(&args->inode->i_lock);
2034         if (NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn) {
2035                 NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn(
2036                         NFS_I(args->inode)->layout, xdr, args);
2037         } else {
2038                 p = reserve_space(xdr, 4);
2039                 *p = cpu_to_be32(0);
2040         }
2041         hdr->nops++;
2042         hdr->replen += decode_layoutreturn_maxsz;
2043 }
2044
2045 static int
2046 encode_secinfo_no_name(struct xdr_stream *xdr,
2047                        const struct nfs41_secinfo_no_name_args *args,
2048                        struct compound_hdr *hdr)
2049 {
2050         __be32 *p;
2051         p = reserve_space(xdr, 8);
2052         *p++ = cpu_to_be32(OP_SECINFO_NO_NAME);
2053         *p++ = cpu_to_be32(args->style);
2054         hdr->nops++;
2055         hdr->replen += decode_secinfo_no_name_maxsz;
2056         return 0;
2057 }
2058
2059 static void encode_test_stateid(struct xdr_stream *xdr,
2060                                 struct nfs41_test_stateid_args *args,
2061                                 struct compound_hdr *hdr)
2062 {
2063         __be32 *p;
2064
2065         p = reserve_space(xdr, 8 + NFS4_STATEID_SIZE);
2066         *p++ = cpu_to_be32(OP_TEST_STATEID);
2067         *p++ = cpu_to_be32(1);
2068         xdr_encode_opaque_fixed(p, args->stateid->data, NFS4_STATEID_SIZE);
2069         hdr->nops++;
2070         hdr->replen += decode_test_stateid_maxsz;
2071 }
2072
2073 static void encode_free_stateid(struct xdr_stream *xdr,
2074                                 struct nfs41_free_stateid_args *args,
2075                                 struct compound_hdr *hdr)
2076 {
2077         __be32 *p;
2078         p = reserve_space(xdr, 4 + NFS4_STATEID_SIZE);
2079         *p++ = cpu_to_be32(OP_FREE_STATEID);
2080         xdr_encode_opaque_fixed(p, args->stateid->data, NFS4_STATEID_SIZE);
2081         hdr->nops++;
2082         hdr->replen += decode_free_stateid_maxsz;
2083 }
2084 #endif /* CONFIG_NFS_V4_1 */
2085
2086 /*
2087  * END OF "GENERIC" ENCODE ROUTINES.
2088  */
2089
2090 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2091 {
2092 #if defined(CONFIG_NFS_V4_1)
2093         if (args->sa_session)
2094                 return args->sa_session->clp->cl_mvops->minor_version;
2095 #endif /* CONFIG_NFS_V4_1 */
2096         return 0;
2097 }
2098
2099 /*
2100  * Encode an ACCESS request
2101  */
2102 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2103                                 const struct nfs4_accessargs *args)
2104 {
2105         struct compound_hdr hdr = {
2106                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2107         };
2108
2109         encode_compound_hdr(xdr, req, &hdr);
2110         encode_sequence(xdr, &args->seq_args, &hdr);
2111         encode_putfh(xdr, args->fh, &hdr);
2112         encode_access(xdr, args->access, &hdr);
2113         encode_getfattr(xdr, args->bitmask, &hdr);
2114         encode_nops(&hdr);
2115 }
2116
2117 /*
2118  * Encode LOOKUP request
2119  */
2120 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2121                                 const struct nfs4_lookup_arg *args)
2122 {
2123         struct compound_hdr hdr = {
2124                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2125         };
2126
2127         encode_compound_hdr(xdr, req, &hdr);
2128         encode_sequence(xdr, &args->seq_args, &hdr);
2129         encode_putfh(xdr, args->dir_fh, &hdr);
2130         encode_lookup(xdr, args->name, &hdr);
2131         encode_getfh(xdr, &hdr);
2132         encode_getfattr(xdr, args->bitmask, &hdr);
2133         encode_nops(&hdr);
2134 }
2135
2136 /*
2137  * Encode LOOKUP_ROOT request
2138  */
2139 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2140                                      struct xdr_stream *xdr,
2141                                      const struct nfs4_lookup_root_arg *args)
2142 {
2143         struct compound_hdr hdr = {
2144                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2145         };
2146
2147         encode_compound_hdr(xdr, req, &hdr);
2148         encode_sequence(xdr, &args->seq_args, &hdr);
2149         encode_putrootfh(xdr, &hdr);
2150         encode_getfh(xdr, &hdr);
2151         encode_getfattr(xdr, args->bitmask, &hdr);
2152         encode_nops(&hdr);
2153 }
2154
2155 /*
2156  * Encode REMOVE request
2157  */
2158 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2159                                 const struct nfs_removeargs *args)
2160 {
2161         struct compound_hdr hdr = {
2162                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2163         };
2164
2165         encode_compound_hdr(xdr, req, &hdr);
2166         encode_sequence(xdr, &args->seq_args, &hdr);
2167         encode_putfh(xdr, args->fh, &hdr);
2168         encode_remove(xdr, &args->name, &hdr);
2169         encode_getfattr(xdr, args->bitmask, &hdr);
2170         encode_nops(&hdr);
2171 }
2172
2173 /*
2174  * Encode RENAME request
2175  */
2176 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2177                                 const struct nfs_renameargs *args)
2178 {
2179         struct compound_hdr hdr = {
2180                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2181         };
2182
2183         encode_compound_hdr(xdr, req, &hdr);
2184         encode_sequence(xdr, &args->seq_args, &hdr);
2185         encode_putfh(xdr, args->old_dir, &hdr);
2186         encode_savefh(xdr, &hdr);
2187         encode_putfh(xdr, args->new_dir, &hdr);
2188         encode_rename(xdr, args->old_name, args->new_name, &hdr);
2189         encode_getfattr(xdr, args->bitmask, &hdr);
2190         encode_restorefh(xdr, &hdr);
2191         encode_getfattr(xdr, args->bitmask, &hdr);
2192         encode_nops(&hdr);
2193 }
2194
2195 /*
2196  * Encode LINK request
2197  */
2198 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2199                              const struct nfs4_link_arg *args)
2200 {
2201         struct compound_hdr hdr = {
2202                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2203         };
2204
2205         encode_compound_hdr(xdr, req, &hdr);
2206         encode_sequence(xdr, &args->seq_args, &hdr);
2207         encode_putfh(xdr, args->fh, &hdr);
2208         encode_savefh(xdr, &hdr);
2209         encode_putfh(xdr, args->dir_fh, &hdr);
2210         encode_link(xdr, args->name, &hdr);
2211         encode_getfattr(xdr, args->bitmask, &hdr);
2212         encode_restorefh(xdr, &hdr);
2213         encode_getfattr(xdr, args->bitmask, &hdr);
2214         encode_nops(&hdr);
2215 }
2216
2217 /*
2218  * Encode CREATE request
2219  */
2220 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2221                                 const struct nfs4_create_arg *args)
2222 {
2223         struct compound_hdr hdr = {
2224                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2225         };
2226
2227         encode_compound_hdr(xdr, req, &hdr);
2228         encode_sequence(xdr, &args->seq_args, &hdr);
2229         encode_putfh(xdr, args->dir_fh, &hdr);
2230         encode_savefh(xdr, &hdr);
2231         encode_create(xdr, args, &hdr);
2232         encode_getfh(xdr, &hdr);
2233         encode_getfattr(xdr, args->bitmask, &hdr);
2234         encode_restorefh(xdr, &hdr);
2235         encode_getfattr(xdr, args->bitmask, &hdr);
2236         encode_nops(&hdr);
2237 }
2238
2239 /*
2240  * Encode SYMLINK request
2241  */
2242 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2243                                  const struct nfs4_create_arg *args)
2244 {
2245         nfs4_xdr_enc_create(req, xdr, args);
2246 }
2247
2248 /*
2249  * Encode GETATTR request
2250  */
2251 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2252                                  const struct nfs4_getattr_arg *args)
2253 {
2254         struct compound_hdr hdr = {
2255                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2256         };
2257
2258         encode_compound_hdr(xdr, req, &hdr);
2259         encode_sequence(xdr, &args->seq_args, &hdr);
2260         encode_putfh(xdr, args->fh, &hdr);
2261         encode_getfattr(xdr, args->bitmask, &hdr);
2262         encode_nops(&hdr);
2263 }
2264
2265 /*
2266  * Encode a CLOSE request
2267  */
2268 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2269                                struct nfs_closeargs *args)
2270 {
2271         struct compound_hdr hdr = {
2272                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2273         };
2274
2275         encode_compound_hdr(xdr, req, &hdr);
2276         encode_sequence(xdr, &args->seq_args, &hdr);
2277         encode_putfh(xdr, args->fh, &hdr);
2278         encode_close(xdr, args, &hdr);
2279         encode_getfattr(xdr, args->bitmask, &hdr);
2280         encode_nops(&hdr);
2281 }
2282
2283 /*
2284  * Encode an OPEN request
2285  */
2286 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2287                               struct nfs_openargs *args)
2288 {
2289         struct compound_hdr hdr = {
2290                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2291         };
2292
2293         encode_compound_hdr(xdr, req, &hdr);
2294         encode_sequence(xdr, &args->seq_args, &hdr);
2295         encode_putfh(xdr, args->fh, &hdr);
2296         encode_savefh(xdr, &hdr);
2297         encode_open(xdr, args, &hdr);
2298         encode_getfh(xdr, &hdr);
2299         encode_getfattr(xdr, args->bitmask, &hdr);
2300         encode_restorefh(xdr, &hdr);
2301         encode_getfattr(xdr, args->bitmask, &hdr);
2302         encode_nops(&hdr);
2303 }
2304
2305 /*
2306  * Encode an OPEN_CONFIRM request
2307  */
2308 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2309                                       struct xdr_stream *xdr,
2310                                       struct nfs_open_confirmargs *args)
2311 {
2312         struct compound_hdr hdr = {
2313                 .nops   = 0,
2314         };
2315
2316         encode_compound_hdr(xdr, req, &hdr);
2317         encode_putfh(xdr, args->fh, &hdr);
2318         encode_open_confirm(xdr, args, &hdr);
2319         encode_nops(&hdr);
2320 }
2321
2322 /*
2323  * Encode an OPEN request with no attributes.
2324  */
2325 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2326                                      struct xdr_stream *xdr,
2327                                      struct nfs_openargs *args)
2328 {
2329         struct compound_hdr hdr = {
2330                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2331         };
2332
2333         encode_compound_hdr(xdr, req, &hdr);
2334         encode_sequence(xdr, &args->seq_args, &hdr);
2335         encode_putfh(xdr, args->fh, &hdr);
2336         encode_open(xdr, args, &hdr);
2337         encode_getfattr(xdr, args->bitmask, &hdr);
2338         encode_nops(&hdr);
2339 }
2340
2341 /*
2342  * Encode an OPEN_DOWNGRADE request
2343  */
2344 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2345                                         struct xdr_stream *xdr,
2346                                         struct nfs_closeargs *args)
2347 {
2348         struct compound_hdr hdr = {
2349                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2350         };
2351
2352         encode_compound_hdr(xdr, req, &hdr);
2353         encode_sequence(xdr, &args->seq_args, &hdr);
2354         encode_putfh(xdr, args->fh, &hdr);
2355         encode_open_downgrade(xdr, args, &hdr);
2356         encode_getfattr(xdr, args->bitmask, &hdr);
2357         encode_nops(&hdr);
2358 }
2359
2360 /*
2361  * Encode a LOCK request
2362  */
2363 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2364                               struct nfs_lock_args *args)
2365 {
2366         struct compound_hdr hdr = {
2367                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2368         };
2369
2370         encode_compound_hdr(xdr, req, &hdr);
2371         encode_sequence(xdr, &args->seq_args, &hdr);
2372         encode_putfh(xdr, args->fh, &hdr);
2373         encode_lock(xdr, args, &hdr);
2374         encode_nops(&hdr);
2375 }
2376
2377 /*
2378  * Encode a LOCKT request
2379  */
2380 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2381                                struct nfs_lockt_args *args)
2382 {
2383         struct compound_hdr hdr = {
2384                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2385         };
2386
2387         encode_compound_hdr(xdr, req, &hdr);
2388         encode_sequence(xdr, &args->seq_args, &hdr);
2389         encode_putfh(xdr, args->fh, &hdr);
2390         encode_lockt(xdr, args, &hdr);
2391         encode_nops(&hdr);
2392 }
2393
2394 /*
2395  * Encode a LOCKU request
2396  */
2397 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2398                                struct nfs_locku_args *args)
2399 {
2400         struct compound_hdr hdr = {
2401                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2402         };
2403
2404         encode_compound_hdr(xdr, req, &hdr);
2405         encode_sequence(xdr, &args->seq_args, &hdr);
2406         encode_putfh(xdr, args->fh, &hdr);
2407         encode_locku(xdr, args, &hdr);
2408         encode_nops(&hdr);
2409 }
2410
2411 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2412                                            struct xdr_stream *xdr,
2413                                         struct nfs_release_lockowner_args *args)
2414 {
2415         struct compound_hdr hdr = {
2416                 .minorversion = 0,
2417         };
2418
2419         encode_compound_hdr(xdr, req, &hdr);
2420         encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2421         encode_nops(&hdr);
2422 }
2423
2424 /*
2425  * Encode a READLINK request
2426  */
2427 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2428                                   const struct nfs4_readlink *args)
2429 {
2430         struct compound_hdr hdr = {
2431                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2432         };
2433
2434         encode_compound_hdr(xdr, req, &hdr);
2435         encode_sequence(xdr, &args->seq_args, &hdr);
2436         encode_putfh(xdr, args->fh, &hdr);
2437         encode_readlink(xdr, args, req, &hdr);
2438
2439         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2440                         args->pgbase, args->pglen);
2441         encode_nops(&hdr);
2442 }
2443
2444 /*
2445  * Encode a READDIR request
2446  */
2447 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2448                                  const struct nfs4_readdir_arg *args)
2449 {
2450         struct compound_hdr hdr = {
2451                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2452         };
2453
2454         encode_compound_hdr(xdr, req, &hdr);
2455         encode_sequence(xdr, &args->seq_args, &hdr);
2456         encode_putfh(xdr, args->fh, &hdr);
2457         encode_readdir(xdr, args, req, &hdr);
2458
2459         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2460                          args->pgbase, args->count);
2461         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2462                         __func__, hdr.replen << 2, args->pages,
2463                         args->pgbase, args->count);
2464         encode_nops(&hdr);
2465 }
2466
2467 /*
2468  * Encode a READ request
2469  */
2470 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2471                               struct nfs_readargs *args)
2472 {
2473         struct compound_hdr hdr = {
2474                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2475         };
2476
2477         encode_compound_hdr(xdr, req, &hdr);
2478         encode_sequence(xdr, &args->seq_args, &hdr);
2479         encode_putfh(xdr, args->fh, &hdr);
2480         encode_read(xdr, args, &hdr);
2481
2482         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2483                          args->pages, args->pgbase, args->count);
2484         req->rq_rcv_buf.flags |= XDRBUF_READ;
2485         encode_nops(&hdr);
2486 }
2487
2488 /*
2489  * Encode an SETATTR request
2490  */
2491 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2492                                  struct nfs_setattrargs *args)
2493 {
2494         struct compound_hdr hdr = {
2495                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2496         };
2497
2498         encode_compound_hdr(xdr, req, &hdr);
2499         encode_sequence(xdr, &args->seq_args, &hdr);
2500         encode_putfh(xdr, args->fh, &hdr);
2501         encode_setattr(xdr, args, args->server, &hdr);
2502         encode_getfattr(xdr, args->bitmask, &hdr);
2503         encode_nops(&hdr);
2504 }
2505
2506 /*
2507  * Encode a GETACL request
2508  */
2509 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2510                                 struct nfs_getaclargs *args)
2511 {
2512         struct compound_hdr hdr = {
2513                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2514         };
2515         uint32_t replen;
2516
2517         encode_compound_hdr(xdr, req, &hdr);
2518         encode_sequence(xdr, &args->seq_args, &hdr);
2519         encode_putfh(xdr, args->fh, &hdr);
2520         replen = hdr.replen + op_decode_hdr_maxsz + nfs4_fattr_bitmap_maxsz + 1;
2521         encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2522
2523         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2524                 args->acl_pages, args->acl_pgbase, args->acl_len);
2525         encode_nops(&hdr);
2526 }
2527
2528 /*
2529  * Encode a WRITE request
2530  */
2531 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2532                                struct nfs_writeargs *args)
2533 {
2534         struct compound_hdr hdr = {
2535                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2536         };
2537
2538         encode_compound_hdr(xdr, req, &hdr);
2539         encode_sequence(xdr, &args->seq_args, &hdr);
2540         encode_putfh(xdr, args->fh, &hdr);
2541         encode_write(xdr, args, &hdr);
2542         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2543         if (args->bitmask)
2544                 encode_getfattr(xdr, args->bitmask, &hdr);
2545         encode_nops(&hdr);
2546 }
2547
2548 /*
2549  *  a COMMIT request
2550  */
2551 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2552                                 struct nfs_writeargs *args)
2553 {
2554         struct compound_hdr hdr = {
2555                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2556         };
2557
2558         encode_compound_hdr(xdr, req, &hdr);
2559         encode_sequence(xdr, &args->seq_args, &hdr);
2560         encode_putfh(xdr, args->fh, &hdr);
2561         encode_commit(xdr, args, &hdr);
2562         if (args->bitmask)
2563                 encode_getfattr(xdr, args->bitmask, &hdr);
2564         encode_nops(&hdr);
2565 }
2566
2567 /*
2568  * FSINFO request
2569  */
2570 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2571                                 struct nfs4_fsinfo_arg *args)
2572 {
2573         struct compound_hdr hdr = {
2574                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2575         };
2576
2577         encode_compound_hdr(xdr, req, &hdr);
2578         encode_sequence(xdr, &args->seq_args, &hdr);
2579         encode_putfh(xdr, args->fh, &hdr);
2580         encode_fsinfo(xdr, args->bitmask, &hdr);
2581         encode_nops(&hdr);
2582 }
2583
2584 /*
2585  * a PATHCONF request
2586  */
2587 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2588                                   const struct nfs4_pathconf_arg *args)
2589 {
2590         struct compound_hdr hdr = {
2591                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2592         };
2593
2594         encode_compound_hdr(xdr, req, &hdr);
2595         encode_sequence(xdr, &args->seq_args, &hdr);
2596         encode_putfh(xdr, args->fh, &hdr);
2597         encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2598                            &hdr);
2599         encode_nops(&hdr);
2600 }
2601
2602 /*
2603  * a STATFS request
2604  */
2605 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2606                                 const struct nfs4_statfs_arg *args)
2607 {
2608         struct compound_hdr hdr = {
2609                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2610         };
2611
2612         encode_compound_hdr(xdr, req, &hdr);
2613         encode_sequence(xdr, &args->seq_args, &hdr);
2614         encode_putfh(xdr, args->fh, &hdr);
2615         encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2616                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2617         encode_nops(&hdr);
2618 }
2619
2620 /*
2621  * GETATTR_BITMAP request
2622  */
2623 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2624                                      struct xdr_stream *xdr,
2625                                      struct nfs4_server_caps_arg *args)
2626 {
2627         struct compound_hdr hdr = {
2628                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2629         };
2630
2631         encode_compound_hdr(xdr, req, &hdr);
2632         encode_sequence(xdr, &args->seq_args, &hdr);
2633         encode_putfh(xdr, args->fhandle, &hdr);
2634         encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2635                            FATTR4_WORD0_LINK_SUPPORT|
2636                            FATTR4_WORD0_SYMLINK_SUPPORT|
2637                            FATTR4_WORD0_ACLSUPPORT, &hdr);
2638         encode_nops(&hdr);
2639 }
2640
2641 /*
2642  * a RENEW request
2643  */
2644 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2645                                struct nfs_client *clp)
2646 {
2647         struct compound_hdr hdr = {
2648                 .nops   = 0,
2649         };
2650
2651         encode_compound_hdr(xdr, req, &hdr);
2652         encode_renew(xdr, clp, &hdr);
2653         encode_nops(&hdr);
2654 }
2655
2656 /*
2657  * a SETCLIENTID request
2658  */
2659 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2660                                      struct xdr_stream *xdr,
2661                                      struct nfs4_setclientid *sc)
2662 {
2663         struct compound_hdr hdr = {
2664                 .nops   = 0,
2665         };
2666
2667         encode_compound_hdr(xdr, req, &hdr);
2668         encode_setclientid(xdr, sc, &hdr);
2669         encode_nops(&hdr);
2670 }
2671
2672 /*
2673  * a SETCLIENTID_CONFIRM request
2674  */
2675 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2676                                              struct xdr_stream *xdr,
2677                                              struct nfs4_setclientid_res *arg)
2678 {
2679         struct compound_hdr hdr = {
2680                 .nops   = 0,
2681         };
2682         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2683
2684         encode_compound_hdr(xdr, req, &hdr);
2685         encode_setclientid_confirm(xdr, arg, &hdr);
2686         encode_putrootfh(xdr, &hdr);
2687         encode_fsinfo(xdr, lease_bitmap, &hdr);
2688         encode_nops(&hdr);
2689 }
2690
2691 /*
2692  * DELEGRETURN request
2693  */
2694 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2695                                      struct xdr_stream *xdr,
2696                                      const struct nfs4_delegreturnargs *args)
2697 {
2698         struct compound_hdr hdr = {
2699                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2700         };
2701
2702         encode_compound_hdr(xdr, req, &hdr);
2703         encode_sequence(xdr, &args->seq_args, &hdr);
2704         encode_putfh(xdr, args->fhandle, &hdr);
2705         encode_delegreturn(xdr, args->stateid, &hdr);
2706         encode_getfattr(xdr, args->bitmask, &hdr);
2707         encode_nops(&hdr);
2708 }
2709
2710 /*
2711  * Encode FS_LOCATIONS request
2712  */
2713 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2714                                       struct xdr_stream *xdr,
2715                                       struct nfs4_fs_locations_arg *args)
2716 {
2717         struct compound_hdr hdr = {
2718                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2719         };
2720         uint32_t replen;
2721
2722         encode_compound_hdr(xdr, req, &hdr);
2723         encode_sequence(xdr, &args->seq_args, &hdr);
2724         encode_putfh(xdr, args->dir_fh, &hdr);
2725         encode_lookup(xdr, args->name, &hdr);
2726         replen = hdr.replen;    /* get the attribute into args->page */
2727         encode_fs_locations(xdr, args->bitmask, &hdr);
2728
2729         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2730                         0, PAGE_SIZE);
2731         encode_nops(&hdr);
2732 }
2733
2734 /*
2735  * Encode SECINFO request
2736  */
2737 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2738                                 struct xdr_stream *xdr,
2739                                 struct nfs4_secinfo_arg *args)
2740 {
2741         struct compound_hdr hdr = {
2742                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2743         };
2744
2745         encode_compound_hdr(xdr, req, &hdr);
2746         encode_sequence(xdr, &args->seq_args, &hdr);
2747         encode_putfh(xdr, args->dir_fh, &hdr);
2748         encode_secinfo(xdr, args->name, &hdr);
2749         encode_nops(&hdr);
2750 }
2751
2752 #if defined(CONFIG_NFS_V4_1)
2753 /*
2754  * EXCHANGE_ID request
2755  */
2756 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2757                                      struct xdr_stream *xdr,
2758                                      struct nfs41_exchange_id_args *args)
2759 {
2760         struct compound_hdr hdr = {
2761                 .minorversion = args->client->cl_mvops->minor_version,
2762         };
2763
2764         encode_compound_hdr(xdr, req, &hdr);
2765         encode_exchange_id(xdr, args, &hdr);
2766         encode_nops(&hdr);
2767 }
2768
2769 /*
2770  * a CREATE_SESSION request
2771  */
2772 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2773                                         struct xdr_stream *xdr,
2774                                         struct nfs41_create_session_args *args)
2775 {
2776         struct compound_hdr hdr = {
2777                 .minorversion = args->client->cl_mvops->minor_version,
2778         };
2779
2780         encode_compound_hdr(xdr, req, &hdr);
2781         encode_create_session(xdr, args, &hdr);
2782         encode_nops(&hdr);
2783 }
2784
2785 /*
2786  * a DESTROY_SESSION request
2787  */
2788 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2789                                          struct xdr_stream *xdr,
2790                                          struct nfs4_session *session)
2791 {
2792         struct compound_hdr hdr = {
2793                 .minorversion = session->clp->cl_mvops->minor_version,
2794         };
2795
2796         encode_compound_hdr(xdr, req, &hdr);
2797         encode_destroy_session(xdr, session, &hdr);
2798         encode_nops(&hdr);
2799 }
2800
2801 /*
2802  * a SEQUENCE request
2803  */
2804 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2805                                   struct nfs4_sequence_args *args)
2806 {
2807         struct compound_hdr hdr = {
2808                 .minorversion = nfs4_xdr_minorversion(args),
2809         };
2810
2811         encode_compound_hdr(xdr, req, &hdr);
2812         encode_sequence(xdr, args, &hdr);
2813         encode_nops(&hdr);
2814 }
2815
2816 /*
2817  * a GET_LEASE_TIME request
2818  */
2819 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2820                                         struct xdr_stream *xdr,
2821                                         struct nfs4_get_lease_time_args *args)
2822 {
2823         struct compound_hdr hdr = {
2824                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2825         };
2826         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2827
2828         encode_compound_hdr(xdr, req, &hdr);
2829         encode_sequence(xdr, &args->la_seq_args, &hdr);
2830         encode_putrootfh(xdr, &hdr);
2831         encode_fsinfo(xdr, lease_bitmap, &hdr);
2832         encode_nops(&hdr);
2833 }
2834
2835 /*
2836  * a RECLAIM_COMPLETE request
2837  */
2838 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2839                                           struct xdr_stream *xdr,
2840                                 struct nfs41_reclaim_complete_args *args)
2841 {
2842         struct compound_hdr hdr = {
2843                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2844         };
2845
2846         encode_compound_hdr(xdr, req, &hdr);
2847         encode_sequence(xdr, &args->seq_args, &hdr);
2848         encode_reclaim_complete(xdr, args, &hdr);
2849         encode_nops(&hdr);
2850 }
2851
2852 /*
2853  * Encode GETDEVICELIST request
2854  */
2855 static void nfs4_xdr_enc_getdevicelist(struct rpc_rqst *req,
2856                                        struct xdr_stream *xdr,
2857                                        struct nfs4_getdevicelist_args *args)
2858 {
2859         struct compound_hdr hdr = {
2860                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2861         };
2862
2863         encode_compound_hdr(xdr, req, &hdr);
2864         encode_sequence(xdr, &args->seq_args, &hdr);
2865         encode_putfh(xdr, args->fh, &hdr);
2866         encode_getdevicelist(xdr, args, &hdr);
2867         encode_nops(&hdr);
2868 }
2869
2870 /*
2871  * Encode GETDEVICEINFO request
2872  */
2873 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2874                                        struct xdr_stream *xdr,
2875                                        struct nfs4_getdeviceinfo_args *args)
2876 {
2877         struct compound_hdr hdr = {
2878                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2879         };
2880
2881         encode_compound_hdr(xdr, req, &hdr);
2882         encode_sequence(xdr, &args->seq_args, &hdr);
2883         encode_getdeviceinfo(xdr, args, &hdr);
2884
2885         /* set up reply kvec. Subtract notification bitmap max size (2)
2886          * so that notification bitmap is put in xdr_buf tail */
2887         xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2888                          args->pdev->pages, args->pdev->pgbase,
2889                          args->pdev->pglen);
2890
2891         encode_nops(&hdr);
2892 }
2893
2894 /*
2895  *  Encode LAYOUTGET request
2896  */
2897 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2898                                    struct xdr_stream *xdr,
2899                                    struct nfs4_layoutget_args *args)
2900 {
2901         struct compound_hdr hdr = {
2902                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2903         };
2904
2905         encode_compound_hdr(xdr, req, &hdr);
2906         encode_sequence(xdr, &args->seq_args, &hdr);
2907         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2908         encode_layoutget(xdr, args, &hdr);
2909
2910         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2911             args->layout.pages, 0, args->layout.pglen);
2912
2913         encode_nops(&hdr);
2914 }
2915
2916 /*
2917  *  Encode LAYOUTCOMMIT request
2918  */
2919 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2920                                       struct xdr_stream *xdr,
2921                                       struct nfs4_layoutcommit_args *args)
2922 {
2923         struct nfs4_layoutcommit_data *data =
2924                 container_of(args, struct nfs4_layoutcommit_data, args);
2925         struct compound_hdr hdr = {
2926                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2927         };
2928
2929         encode_compound_hdr(xdr, req, &hdr);
2930         encode_sequence(xdr, &args->seq_args, &hdr);
2931         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2932         encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2933         encode_getfattr(xdr, args->bitmask, &hdr);
2934         encode_nops(&hdr);
2935 }
2936
2937 /*
2938  * Encode LAYOUTRETURN request
2939  */
2940 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2941                                       struct xdr_stream *xdr,
2942                                       struct nfs4_layoutreturn_args *args)
2943 {
2944         struct compound_hdr hdr = {
2945                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2946         };
2947
2948         encode_compound_hdr(xdr, req, &hdr);
2949         encode_sequence(xdr, &args->seq_args, &hdr);
2950         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2951         encode_layoutreturn(xdr, args, &hdr);
2952         encode_nops(&hdr);
2953 }
2954
2955 /*
2956  * Encode SECINFO_NO_NAME request
2957  */
2958 static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
2959                                         struct xdr_stream *xdr,
2960                                         struct nfs41_secinfo_no_name_args *args)
2961 {
2962         struct compound_hdr hdr = {
2963                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2964         };
2965
2966         encode_compound_hdr(xdr, req, &hdr);
2967         encode_sequence(xdr, &args->seq_args, &hdr);
2968         encode_putrootfh(xdr, &hdr);
2969         encode_secinfo_no_name(xdr, args, &hdr);
2970         encode_nops(&hdr);
2971         return 0;
2972 }
2973
2974 /*
2975  *  Encode TEST_STATEID request
2976  */
2977 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
2978                                       struct xdr_stream *xdr,
2979                                       struct nfs41_test_stateid_args *args)
2980 {
2981         struct compound_hdr hdr = {
2982                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2983         };
2984
2985         encode_compound_hdr(xdr, req, &hdr);
2986         encode_sequence(xdr, &args->seq_args, &hdr);
2987         encode_test_stateid(xdr, args, &hdr);
2988         encode_nops(&hdr);
2989 }
2990
2991 /*
2992  *  Encode FREE_STATEID request
2993  */
2994 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
2995                                      struct xdr_stream *xdr,
2996                                      struct nfs41_free_stateid_args *args)
2997 {
2998         struct compound_hdr hdr = {
2999                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3000         };
3001
3002         encode_compound_hdr(xdr, req, &hdr);
3003         encode_sequence(xdr, &args->seq_args, &hdr);
3004         encode_free_stateid(xdr, args, &hdr);
3005         encode_nops(&hdr);
3006 }
3007 #endif /* CONFIG_NFS_V4_1 */
3008
3009 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
3010 {
3011         dprintk("nfs: %s: prematurely hit end of receive buffer. "
3012                 "Remaining buffer length is %tu words.\n",
3013                 func, xdr->end - xdr->p);
3014 }
3015
3016 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3017 {
3018         __be32 *p;
3019
3020         p = xdr_inline_decode(xdr, 4);
3021         if (unlikely(!p))
3022                 goto out_overflow;
3023         *len = be32_to_cpup(p);
3024         p = xdr_inline_decode(xdr, *len);
3025         if (unlikely(!p))
3026                 goto out_overflow;
3027         *string = (char *)p;
3028         return 0;
3029 out_overflow:
3030         print_overflow_msg(__func__, xdr);
3031         return -EIO;
3032 }
3033
3034 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3035 {
3036         __be32 *p;
3037
3038         p = xdr_inline_decode(xdr, 8);
3039         if (unlikely(!p))
3040                 goto out_overflow;
3041         hdr->status = be32_to_cpup(p++);
3042         hdr->taglen = be32_to_cpup(p);
3043
3044         p = xdr_inline_decode(xdr, hdr->taglen + 4);
3045         if (unlikely(!p))
3046                 goto out_overflow;
3047         hdr->tag = (char *)p;
3048         p += XDR_QUADLEN(hdr->taglen);
3049         hdr->nops = be32_to_cpup(p);
3050         if (unlikely(hdr->nops < 1))
3051                 return nfs4_stat_to_errno(hdr->status);
3052         return 0;
3053 out_overflow:
3054         print_overflow_msg(__func__, xdr);
3055         return -EIO;
3056 }
3057
3058 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3059 {
3060         __be32 *p;
3061         uint32_t opnum;
3062         int32_t nfserr;
3063
3064         p = xdr_inline_decode(xdr, 8);
3065         if (unlikely(!p))
3066                 goto out_overflow;
3067         opnum = be32_to_cpup(p++);
3068         if (opnum != expected) {
3069                 dprintk("nfs: Server returned operation"
3070                         " %d but we issued a request for %d\n",
3071                                 opnum, expected);
3072                 return -EIO;
3073         }
3074         nfserr = be32_to_cpup(p);
3075         if (nfserr != NFS_OK)
3076                 return nfs4_stat_to_errno(nfserr);
3077         return 0;
3078 out_overflow:
3079         print_overflow_msg(__func__, xdr);
3080         return -EIO;
3081 }
3082
3083 /* Dummy routine */
3084 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
3085 {
3086         __be32 *p;
3087         unsigned int strlen;
3088         char *str;
3089
3090         p = xdr_inline_decode(xdr, 12);
3091         if (likely(p))
3092                 return decode_opaque_inline(xdr, &strlen, &str);
3093         print_overflow_msg(__func__, xdr);
3094         return -EIO;
3095 }
3096
3097 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3098 {
3099         uint32_t bmlen;
3100         __be32 *p;
3101
3102         p = xdr_inline_decode(xdr, 4);
3103         if (unlikely(!p))
3104                 goto out_overflow;
3105         bmlen = be32_to_cpup(p);
3106
3107         bitmap[0] = bitmap[1] = bitmap[2] = 0;
3108         p = xdr_inline_decode(xdr, (bmlen << 2));
3109         if (unlikely(!p))
3110                 goto out_overflow;
3111         if (bmlen > 0) {
3112                 bitmap[0] = be32_to_cpup(p++);
3113                 if (bmlen > 1) {
3114                         bitmap[1] = be32_to_cpup(p++);
3115                         if (bmlen > 2)
3116                                 bitmap[2] = be32_to_cpup(p);
3117                 }
3118         }
3119         return 0;
3120 out_overflow:
3121         print_overflow_msg(__func__, xdr);
3122         return -EIO;
3123 }
3124
3125 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
3126 {
3127         __be32 *p;
3128
3129         p = xdr_inline_decode(xdr, 4);
3130         if (unlikely(!p))
3131                 goto out_overflow;
3132         *attrlen = be32_to_cpup(p);
3133         *savep = xdr->p;
3134         return 0;
3135 out_overflow:
3136         print_overflow_msg(__func__, xdr);
3137         return -EIO;
3138 }
3139
3140 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3141 {
3142         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3143                 int ret;
3144                 ret = decode_attr_bitmap(xdr, bitmask);
3145                 if (unlikely(ret < 0))
3146                         return ret;
3147                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3148         } else
3149                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3150         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3151                 bitmask[0], bitmask[1], bitmask[2]);
3152         return 0;
3153 }
3154
3155 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3156 {
3157         __be32 *p;
3158         int ret = 0;
3159
3160         *type = 0;
3161         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3162                 return -EIO;
3163         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3164                 p = xdr_inline_decode(xdr, 4);
3165                 if (unlikely(!p))
3166                         goto out_overflow;
3167                 *type = be32_to_cpup(p);
3168                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3169                         dprintk("%s: bad type %d\n", __func__, *type);
3170                         return -EIO;
3171                 }
3172                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3173                 ret = NFS_ATTR_FATTR_TYPE;
3174         }
3175         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3176         return ret;
3177 out_overflow:
3178         print_overflow_msg(__func__, xdr);
3179         return -EIO;
3180 }
3181
3182 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3183 {
3184         __be32 *p;
3185         int ret = 0;
3186
3187         *change = 0;
3188         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3189                 return -EIO;
3190         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3191                 p = xdr_inline_decode(xdr, 8);
3192                 if (unlikely(!p))
3193                         goto out_overflow;
3194                 xdr_decode_hyper(p, change);
3195                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3196                 ret = NFS_ATTR_FATTR_CHANGE;
3197         }
3198         dprintk("%s: change attribute=%Lu\n", __func__,
3199                         (unsigned long long)*change);
3200         return ret;
3201 out_overflow:
3202         print_overflow_msg(__func__, xdr);
3203         return -EIO;
3204 }
3205
3206 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3207 {
3208         __be32 *p;
3209         int ret = 0;
3210
3211         *size = 0;
3212         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3213                 return -EIO;
3214         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3215                 p = xdr_inline_decode(xdr, 8);
3216                 if (unlikely(!p))
3217                         goto out_overflow;
3218                 xdr_decode_hyper(p, size);
3219                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3220                 ret = NFS_ATTR_FATTR_SIZE;
3221         }
3222         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3223         return ret;
3224 out_overflow:
3225         print_overflow_msg(__func__, xdr);
3226         return -EIO;
3227 }
3228
3229 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3230 {
3231         __be32 *p;
3232
3233         *res = 0;
3234         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3235                 return -EIO;
3236         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3237                 p = xdr_inline_decode(xdr, 4);
3238                 if (unlikely(!p))
3239                         goto out_overflow;
3240                 *res = be32_to_cpup(p);
3241                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3242         }
3243         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3244         return 0;
3245 out_overflow:
3246         print_overflow_msg(__func__, xdr);
3247         return -EIO;
3248 }
3249
3250 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3251 {
3252         __be32 *p;
3253
3254         *res = 0;
3255         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3256                 return -EIO;
3257         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3258                 p = xdr_inline_decode(xdr, 4);
3259                 if (unlikely(!p))
3260                         goto out_overflow;
3261                 *res = be32_to_cpup(p);
3262                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3263         }
3264         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3265         return 0;
3266 out_overflow:
3267         print_overflow_msg(__func__, xdr);
3268         return -EIO;
3269 }
3270
3271 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3272 {
3273         __be32 *p;
3274         int ret = 0;
3275
3276         fsid->major = 0;
3277         fsid->minor = 0;
3278         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3279                 return -EIO;
3280         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3281                 p = xdr_inline_decode(xdr, 16);
3282                 if (unlikely(!p))
3283                         goto out_overflow;
3284                 p = xdr_decode_hyper(p, &fsid->major);
3285                 xdr_decode_hyper(p, &fsid->minor);
3286                 bitmap[0] &= ~FATTR4_WORD0_FSID;
3287                 ret = NFS_ATTR_FATTR_FSID;
3288         }
3289         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3290                         (unsigned long long)fsid->major,
3291                         (unsigned long long)fsid->minor);
3292         return ret;
3293 out_overflow:
3294         print_overflow_msg(__func__, xdr);
3295         return -EIO;
3296 }
3297
3298 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3299 {
3300         __be32 *p;
3301
3302         *res = 60;
3303         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3304                 return -EIO;
3305         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3306                 p = xdr_inline_decode(xdr, 4);
3307                 if (unlikely(!p))
3308                         goto out_overflow;
3309                 *res = be32_to_cpup(p);
3310                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3311         }
3312         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3313         return 0;
3314 out_overflow:
3315         print_overflow_msg(__func__, xdr);
3316         return -EIO;
3317 }
3318
3319 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3320 {
3321         __be32 *p;
3322
3323         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3324                 return -EIO;
3325         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3326                 p = xdr_inline_decode(xdr, 4);
3327                 if (unlikely(!p))
3328                         goto out_overflow;
3329                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3330                 *res = -be32_to_cpup(p);
3331         }
3332         return 0;
3333 out_overflow:
3334         print_overflow_msg(__func__, xdr);
3335         return -EIO;
3336 }
3337
3338 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3339 {
3340         __be32 *p;
3341         int len;
3342
3343         if (fh != NULL)
3344                 memset(fh, 0, sizeof(*fh));
3345
3346         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3347                 return -EIO;
3348         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3349                 p = xdr_inline_decode(xdr, 4);
3350                 if (unlikely(!p))
3351                         goto out_overflow;
3352                 len = be32_to_cpup(p);
3353                 if (len > NFS4_FHSIZE)
3354                         return -EIO;
3355                 p = xdr_inline_decode(xdr, len);
3356                 if (unlikely(!p))
3357                         goto out_overflow;
3358                 if (fh != NULL) {
3359                         memcpy(fh->data, p, len);
3360                         fh->size = len;
3361                 }
3362                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3363         }
3364         return 0;
3365 out_overflow:
3366         print_overflow_msg(__func__, xdr);
3367         return -EIO;
3368 }
3369
3370 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3371 {
3372         __be32 *p;
3373
3374         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
3375         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3376                 return -EIO;
3377         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3378                 p = xdr_inline_decode(xdr, 4);
3379                 if (unlikely(!p))
3380                         goto out_overflow;
3381                 *res = be32_to_cpup(p);
3382                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3383         }
3384         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3385         return 0;
3386 out_overflow:
3387         print_overflow_msg(__func__, xdr);
3388         return -EIO;
3389 }
3390
3391 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3392 {
3393         __be32 *p;
3394         int ret = 0;
3395
3396         *fileid = 0;
3397         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3398                 return -EIO;
3399         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3400                 p = xdr_inline_decode(xdr, 8);
3401                 if (unlikely(!p))
3402                         goto out_overflow;
3403                 xdr_decode_hyper(p, fileid);
3404                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3405                 ret = NFS_ATTR_FATTR_FILEID;
3406         }
3407         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3408         return ret;
3409 out_overflow:
3410         print_overflow_msg(__func__, xdr);
3411         return -EIO;
3412 }
3413
3414 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3415 {
3416         __be32 *p;
3417         int ret = 0;
3418
3419         *fileid = 0;
3420         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3421                 return -EIO;
3422         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3423                 p = xdr_inline_decode(xdr, 8);
3424                 if (unlikely(!p))
3425                         goto out_overflow;
3426                 xdr_decode_hyper(p, fileid);
3427                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3428                 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3429         }
3430         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3431         return ret;
3432 out_overflow:
3433         print_overflow_msg(__func__, xdr);
3434         return -EIO;
3435 }
3436
3437 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3438 {
3439         __be32 *p;
3440         int status = 0;
3441
3442         *res = 0;
3443         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3444                 return -EIO;
3445         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3446                 p = xdr_inline_decode(xdr, 8);
3447                 if (unlikely(!p))
3448                         goto out_overflow;
3449                 xdr_decode_hyper(p, res);
3450                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3451         }
3452         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3453         return status;
3454 out_overflow:
3455         print_overflow_msg(__func__, xdr);
3456         return -EIO;
3457 }
3458
3459 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3460 {
3461         __be32 *p;
3462         int status = 0;
3463
3464         *res = 0;
3465         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3466                 return -EIO;
3467         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3468                 p = xdr_inline_decode(xdr, 8);
3469                 if (unlikely(!p))
3470                         goto out_overflow;
3471                 xdr_decode_hyper(p, res);
3472                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3473         }
3474         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3475         return status;
3476 out_overflow:
3477         print_overflow_msg(__func__, xdr);
3478         return -EIO;
3479 }
3480
3481 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3482 {
3483         __be32 *p;
3484         int status = 0;
3485
3486         *res = 0;
3487         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3488                 return -EIO;
3489         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3490                 p = xdr_inline_decode(xdr, 8);
3491                 if (unlikely(!p))
3492                         goto out_overflow;
3493                 xdr_decode_hyper(p, res);
3494                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3495         }
3496         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3497         return status;
3498 out_overflow:
3499         print_overflow_msg(__func__, xdr);
3500         return -EIO;
3501 }
3502
3503 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3504 {
3505         u32 n;
3506         __be32 *p;
3507         int status = 0;
3508
3509         p = xdr_inline_decode(xdr, 4);
3510         if (unlikely(!p))
3511                 goto out_overflow;
3512         n = be32_to_cpup(p);
3513         if (n == 0)
3514                 goto root_path;
3515         dprintk("path ");
3516         path->ncomponents = 0;
3517         while (path->ncomponents < n) {
3518                 struct nfs4_string *component = &path->components[path->ncomponents];
3519                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3520                 if (unlikely(status != 0))
3521                         goto out_eio;
3522                 if (path->ncomponents != n)
3523                         dprintk("/");
3524                 dprintk("%s", component->data);
3525                 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
3526                         path->ncomponents++;
3527                 else {
3528                         dprintk("cannot parse %d components in path\n", n);
3529                         goto out_eio;
3530                 }
3531         }
3532 out:
3533         dprintk("\n");
3534         return status;
3535 root_path:
3536 /* a root pathname is sent as a zero component4 */
3537         path->ncomponents = 1;
3538         path->components[0].len=0;
3539         path->components[0].data=NULL;
3540         dprintk("path /\n");
3541         goto out;
3542 out_eio:
3543         dprintk(" status %d", status);
3544         status = -EIO;
3545         goto out;
3546 out_overflow:
3547         print_overflow_msg(__func__, xdr);
3548         return -EIO;
3549 }
3550
3551 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3552 {
3553         int n;
3554         __be32 *p;
3555         int status = -EIO;
3556
3557         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3558                 goto out;
3559         status = 0;
3560         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3561                 goto out;
3562         dprintk("%s: fsroot ", __func__);
3563         status = decode_pathname(xdr, &res->fs_path);
3564         if (unlikely(status != 0))
3565                 goto out;
3566         p = xdr_inline_decode(xdr, 4);
3567         if (unlikely(!p))
3568                 goto out_overflow;
3569         n = be32_to_cpup(p);
3570         if (n <= 0)
3571                 goto out_eio;
3572         res->nlocations = 0;
3573         while (res->nlocations < n) {
3574                 u32 m;
3575                 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
3576
3577                 p = xdr_inline_decode(xdr, 4);
3578                 if (unlikely(!p))
3579                         goto out_overflow;
3580                 m = be32_to_cpup(p);
3581
3582                 loc->nservers = 0;
3583                 dprintk("%s: servers ", __func__);
3584                 while (loc->nservers < m) {
3585                         struct nfs4_string *server = &loc->servers[loc->nservers];
3586                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3587                         if (unlikely(status != 0))
3588                                 goto out_eio;
3589                         dprintk("%s ", server->data);
3590                         if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
3591                                 loc->nservers++;
3592                         else {
3593                                 unsigned int i;
3594                                 dprintk("%s: using first %u of %u servers "
3595                                         "returned for location %u\n",
3596                                                 __func__,
3597                                                 NFS4_FS_LOCATION_MAXSERVERS,
3598                                                 m, res->nlocations);
3599                                 for (i = loc->nservers; i < m; i++) {
3600                                         unsigned int len;
3601                                         char *data;
3602                                         status = decode_opaque_inline(xdr, &len, &data);
3603                                         if (unlikely(status != 0))
3604                                                 goto out_eio;
3605                                 }
3606                         }
3607                 }
3608                 status = decode_pathname(xdr, &loc->rootpath);
3609                 if (unlikely(status != 0))
3610                         goto out_eio;
3611                 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
3612                         res->nlocations++;
3613         }
3614         if (res->nlocations != 0)
3615                 status = NFS_ATTR_FATTR_V4_REFERRAL;
3616 out:
3617         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3618         return status;
3619 out_overflow:
3620         print_overflow_msg(__func__, xdr);
3621 out_eio:
3622         status = -EIO;
3623         goto out;
3624 }
3625
3626 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3627 {
3628         __be32 *p;
3629         int status = 0;
3630
3631         *res = 0;
3632         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3633                 return -EIO;
3634         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3635                 p = xdr_inline_decode(xdr, 8);
3636                 if (unlikely(!p))
3637                         goto out_overflow;
3638                 xdr_decode_hyper(p, res);
3639                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3640         }
3641         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3642         return status;
3643 out_overflow:
3644         print_overflow_msg(__func__, xdr);
3645         return -EIO;
3646 }
3647
3648 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3649 {
3650         __be32 *p;
3651         int status = 0;
3652
3653         *maxlink = 1;
3654         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3655                 return -EIO;
3656         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3657                 p = xdr_inline_decode(xdr, 4);
3658                 if (unlikely(!p))
3659                         goto out_overflow;
3660                 *maxlink = be32_to_cpup(p);
3661                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3662         }
3663         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3664         return status;
3665 out_overflow:
3666         print_overflow_msg(__func__, xdr);
3667         return -EIO;
3668 }
3669
3670 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3671 {
3672         __be32 *p;
3673         int status = 0;
3674
3675         *maxname = 1024;
3676         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3677                 return -EIO;
3678         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3679                 p = xdr_inline_decode(xdr, 4);
3680                 if (unlikely(!p))
3681                         goto out_overflow;
3682                 *maxname = be32_to_cpup(p);
3683                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3684         }
3685         dprintk("%s: maxname=%u\n", __func__, *maxname);
3686         return status;
3687 out_overflow:
3688         print_overflow_msg(__func__, xdr);
3689         return -EIO;
3690 }
3691
3692 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3693 {
3694         __be32 *p;
3695         int status = 0;
3696
3697         *res = 1024;
3698         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3699                 return -EIO;
3700         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3701                 uint64_t maxread;
3702                 p = xdr_inline_decode(xdr, 8);
3703                 if (unlikely(!p))
3704                         goto out_overflow;
3705                 xdr_decode_hyper(p, &maxread);
3706                 if (maxread > 0x7FFFFFFF)
3707                         maxread = 0x7FFFFFFF;
3708                 *res = (uint32_t)maxread;
3709                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3710         }
3711         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3712         return status;
3713 out_overflow:
3714         print_overflow_msg(__func__, xdr);
3715         return -EIO;
3716 }
3717
3718 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3719 {
3720         __be32 *p;
3721         int status = 0;
3722
3723         *res = 1024;
3724         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3725                 return -EIO;
3726         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3727                 uint64_t maxwrite;
3728                 p = xdr_inline_decode(xdr, 8);
3729                 if (unlikely(!p))
3730                         goto out_overflow;
3731                 xdr_decode_hyper(p, &maxwrite);
3732                 if (maxwrite > 0x7FFFFFFF)
3733                         maxwrite = 0x7FFFFFFF;
3734                 *res = (uint32_t)maxwrite;
3735                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3736         }
3737         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3738         return status;
3739 out_overflow:
3740         print_overflow_msg(__func__, xdr);
3741         return -EIO;
3742 }
3743
3744 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3745 {
3746         uint32_t tmp;
3747         __be32 *p;
3748         int ret = 0;
3749
3750         *mode = 0;
3751         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3752                 return -EIO;
3753         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3754                 p = xdr_inline_decode(xdr, 4);
3755                 if (unlikely(!p))
3756                         goto out_overflow;
3757                 tmp = be32_to_cpup(p);
3758                 *mode = tmp & ~S_IFMT;
3759                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3760                 ret = NFS_ATTR_FATTR_MODE;
3761         }
3762         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3763         return ret;
3764 out_overflow:
3765         print_overflow_msg(__func__, xdr);
3766         return -EIO;
3767 }
3768
3769 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3770 {
3771         __be32 *p;
3772         int ret = 0;
3773
3774         *nlink = 1;
3775         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3776                 return -EIO;
3777         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3778                 p = xdr_inline_decode(xdr, 4);
3779                 if (unlikely(!p))
3780                         goto out_overflow;
3781                 *nlink = be32_to_cpup(p);
3782                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3783                 ret = NFS_ATTR_FATTR_NLINK;
3784         }
3785         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3786         return ret;
3787 out_overflow:
3788         print_overflow_msg(__func__, xdr);
3789         return -EIO;
3790 }
3791
3792 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3793                 const struct nfs_server *server, uint32_t *uid, int may_sleep)
3794 {
3795         uint32_t len;
3796         __be32 *p;
3797         int ret = 0;
3798
3799         *uid = -2;
3800         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3801                 return -EIO;
3802         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3803                 p = xdr_inline_decode(xdr, 4);
3804                 if (unlikely(!p))
3805                         goto out_overflow;
3806                 len = be32_to_cpup(p);
3807                 p = xdr_inline_decode(xdr, len);
3808                 if (unlikely(!p))
3809                         goto out_overflow;
3810                 if (!may_sleep) {
3811                         /* do nothing */
3812                 } else if (len < XDR_MAX_NETOBJ) {
3813                         if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3814                                 ret = NFS_ATTR_FATTR_OWNER;
3815                         else
3816                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3817                                                 __func__);
3818                 } else
3819                         dprintk("%s: name too long (%u)!\n",
3820                                         __func__, len);
3821                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3822         }
3823         dprintk("%s: uid=%d\n", __func__, (int)*uid);
3824         return ret;
3825 out_overflow:
3826         print_overflow_msg(__func__, xdr);
3827         return -EIO;
3828 }
3829
3830 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3831                 const struct nfs_server *server, uint32_t *gid, int may_sleep)
3832 {
3833         uint32_t len;
3834         __be32 *p;
3835         int ret = 0;
3836
3837         *gid = -2;
3838         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3839                 return -EIO;
3840         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3841                 p = xdr_inline_decode(xdr, 4);
3842                 if (unlikely(!p))
3843                         goto out_overflow;
3844                 len = be32_to_cpup(p);
3845                 p = xdr_inline_decode(xdr, len);
3846                 if (unlikely(!p))
3847                         goto out_overflow;
3848                 if (!may_sleep) {
3849                         /* do nothing */
3850                 } else if (len < XDR_MAX_NETOBJ) {
3851                         if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3852                                 ret = NFS_ATTR_FATTR_GROUP;
3853                         else
3854                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3855                                                 __func__);
3856                 } else
3857                         dprintk("%s: name too long (%u)!\n",
3858                                         __func__, len);
3859                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3860         }
3861         dprintk("%s: gid=%d\n", __func__, (int)*gid);
3862         return ret;
3863 out_overflow:
3864         print_overflow_msg(__func__, xdr);
3865         return -EIO;
3866 }
3867
3868 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3869 {
3870         uint32_t major = 0, minor = 0;
3871         __be32 *p;
3872         int ret = 0;
3873
3874         *rdev = MKDEV(0,0);
3875         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3876                 return -EIO;
3877         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3878                 dev_t tmp;
3879
3880                 p = xdr_inline_decode(xdr, 8);
3881                 if (unlikely(!p))
3882                         goto out_overflow;
3883                 major = be32_to_cpup(p++);
3884                 minor = be32_to_cpup(p);
3885                 tmp = MKDEV(major, minor);
3886                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3887                         *rdev = tmp;
3888                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3889                 ret = NFS_ATTR_FATTR_RDEV;
3890         }
3891         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3892         return ret;
3893 out_overflow:
3894         print_overflow_msg(__func__, xdr);
3895         return -EIO;
3896 }
3897
3898 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3899 {
3900         __be32 *p;
3901         int status = 0;
3902
3903         *res = 0;
3904         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3905                 return -EIO;
3906         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3907                 p = xdr_inline_decode(xdr, 8);
3908                 if (unlikely(!p))
3909                         goto out_overflow;
3910                 xdr_decode_hyper(p, res);
3911                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3912         }
3913         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3914         return status;
3915 out_overflow:
3916         print_overflow_msg(__func__, xdr);
3917         return -EIO;
3918 }
3919
3920 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3921 {
3922         __be32 *p;
3923         int status = 0;
3924
3925         *res = 0;
3926         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3927                 return -EIO;
3928         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3929                 p = xdr_inline_decode(xdr, 8);
3930                 if (unlikely(!p))
3931                         goto out_overflow;
3932                 xdr_decode_hyper(p, res);
3933                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3934         }
3935         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3936         return status;
3937 out_overflow:
3938         print_overflow_msg(__func__, xdr);
3939         return -EIO;
3940 }
3941
3942 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3943 {
3944         __be32 *p;
3945         int status = 0;
3946
3947         *res = 0;
3948         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3949                 return -EIO;
3950         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3951                 p = xdr_inline_decode(xdr, 8);
3952                 if (unlikely(!p))
3953                         goto out_overflow;
3954                 xdr_decode_hyper(p, res);
3955                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3956         }
3957         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3958         return status;
3959 out_overflow:
3960         print_overflow_msg(__func__, xdr);
3961         return -EIO;
3962 }
3963
3964 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3965 {
3966         __be32 *p;
3967         int ret = 0;
3968
3969         *used = 0;
3970         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3971                 return -EIO;
3972         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3973                 p = xdr_inline_decode(xdr, 8);
3974                 if (unlikely(!p))
3975                         goto out_overflow;
3976                 xdr_decode_hyper(p, used);
3977                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3978                 ret = NFS_ATTR_FATTR_SPACE_USED;
3979         }
3980         dprintk("%s: space used=%Lu\n", __func__,
3981                         (unsigned long long)*used);
3982         return ret;
3983 out_overflow:
3984         print_overflow_msg(__func__, xdr);
3985         return -EIO;
3986 }
3987
3988 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
3989 {
3990         __be32 *p;
3991         uint64_t sec;
3992         uint32_t nsec;
3993
3994         p = xdr_inline_decode(xdr, 12);
3995         if (unlikely(!p))
3996                 goto out_overflow;
3997         p = xdr_decode_hyper(p, &sec);
3998         nsec = be32_to_cpup(p);
3999         time->tv_sec = (time_t)sec;
4000         time->tv_nsec = (long)nsec;
4001         return 0;
4002 out_overflow:
4003         print_overflow_msg(__func__, xdr);
4004         return -EIO;
4005 }
4006
4007 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4008 {
4009         int status = 0;
4010
4011         time->tv_sec = 0;
4012         time->tv_nsec = 0;
4013         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4014                 return -EIO;
4015         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4016                 status = decode_attr_time(xdr, time);
4017                 if (status == 0)
4018                         status = NFS_ATTR_FATTR_ATIME;
4019                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4020         }
4021         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4022         return status;
4023 }
4024
4025 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4026 {
4027         int status = 0;
4028
4029         time->tv_sec = 0;
4030         time->tv_nsec = 0;
4031         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4032                 return -EIO;
4033         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4034                 status = decode_attr_time(xdr, time);
4035                 if (status == 0)
4036                         status = NFS_ATTR_FATTR_CTIME;
4037                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4038         }
4039         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4040         return status;
4041 }
4042
4043 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4044                                   struct timespec *time)
4045 {
4046         int status = 0;
4047
4048         time->tv_sec = 0;
4049         time->tv_nsec = 0;
4050         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4051                 return -EIO;
4052         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4053                 status = decode_attr_time(xdr, time);
4054                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4055         }
4056         dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4057                 (long)time->tv_nsec);
4058         return status;
4059 }
4060
4061 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4062 {
4063         int status = 0;
4064
4065         time->tv_sec = 0;
4066         time->tv_nsec = 0;
4067         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4068                 return -EIO;
4069         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4070                 status = decode_attr_time(xdr, time);
4071                 if (status == 0)
4072                         status = NFS_ATTR_FATTR_MTIME;
4073                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4074         }
4075         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4076         return status;
4077 }
4078
4079 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
4080 {
4081         unsigned int attrwords = XDR_QUADLEN(attrlen);
4082         unsigned int nwords = xdr->p - savep;
4083
4084         if (unlikely(attrwords != nwords)) {
4085                 dprintk("%s: server returned incorrect attribute length: "
4086                         "%u %c %u\n",
4087                                 __func__,
4088                                 attrwords << 2,
4089                                 (attrwords < nwords) ? '<' : '>',
4090                                 nwords << 2);
4091                 return -EIO;
4092         }
4093         return 0;
4094 }
4095
4096 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4097 {
4098         __be32 *p;
4099
4100         p = xdr_inline_decode(xdr, 20);
4101         if (unlikely(!p))
4102                 goto out_overflow;
4103         cinfo->atomic = be32_to_cpup(p++);
4104         p = xdr_decode_hyper(p, &cinfo->before);
4105         xdr_decode_hyper(p, &cinfo->after);
4106         return 0;
4107 out_overflow:
4108         print_overflow_msg(__func__, xdr);
4109         return -EIO;
4110 }
4111
4112 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
4113 {
4114         __be32 *p;
4115         uint32_t supp, acc;
4116         int status;
4117
4118         status = decode_op_hdr(xdr, OP_ACCESS);
4119         if (status)
4120                 return status;
4121         p = xdr_inline_decode(xdr, 8);
4122         if (unlikely(!p))
4123                 goto out_overflow;
4124         supp = be32_to_cpup(p++);
4125         acc = be32_to_cpup(p);
4126         access->supported = supp;
4127         access->access = acc;
4128         return 0;
4129 out_overflow:
4130         print_overflow_msg(__func__, xdr);
4131         return -EIO;
4132 }
4133
4134 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4135 {
4136         __be32 *p;
4137
4138         p = xdr_inline_decode(xdr, len);
4139         if (likely(p)) {
4140                 memcpy(buf, p, len);
4141                 return 0;
4142         }
4143         print_overflow_msg(__func__, xdr);
4144         return -EIO;
4145 }
4146
4147 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4148 {
4149         return decode_opaque_fixed(xdr, stateid->data, NFS4_STATEID_SIZE);
4150 }
4151
4152 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4153 {
4154         int status;
4155
4156         status = decode_op_hdr(xdr, OP_CLOSE);
4157         if (status != -EIO)
4158                 nfs_increment_open_seqid(status, res->seqid);
4159         if (!status)
4160                 status = decode_stateid(xdr, &res->stateid);
4161         return status;
4162 }
4163
4164 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4165 {
4166         return decode_opaque_fixed(xdr, verifier, 8);
4167 }
4168
4169 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
4170 {
4171         int status;
4172
4173         status = decode_op_hdr(xdr, OP_COMMIT);
4174         if (!status)
4175                 status = decode_verifier(xdr, res->verf->verifier);
4176         return status;
4177 }
4178
4179 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4180 {
4181         __be32 *p;
4182         uint32_t bmlen;
4183         int status;
4184
4185         status = decode_op_hdr(xdr, OP_CREATE);
4186         if (status)
4187                 return status;
4188         if ((status = decode_change_info(xdr, cinfo)))
4189                 return status;
4190         p = xdr_inline_decode(xdr, 4);
4191         if (unlikely(!p))
4192                 goto out_overflow;
4193         bmlen = be32_to_cpup(p);
4194         p = xdr_inline_decode(xdr, bmlen << 2);
4195         if (likely(p))
4196                 return 0;
4197 out_overflow:
4198         print_overflow_msg(__func__, xdr);
4199         return -EIO;
4200 }
4201
4202 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4203 {
4204         __be32 *savep;
4205         uint32_t attrlen, bitmap[3] = {0};
4206         int status;
4207
4208         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4209                 goto xdr_error;
4210         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4211                 goto xdr_error;
4212         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4213                 goto xdr_error;
4214         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4215                 goto xdr_error;
4216         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4217                 goto xdr_error;
4218         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4219                 goto xdr_error;
4220         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4221                 goto xdr_error;
4222         status = verify_attr_len(xdr, savep, attrlen);
4223 xdr_error:
4224         dprintk("%s: xdr returned %d!\n", __func__, -status);
4225         return status;
4226 }
4227
4228 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4229 {
4230         __be32 *savep;
4231         uint32_t attrlen, bitmap[3] = {0};
4232         int status;
4233
4234         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4235                 goto xdr_error;
4236         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4237                 goto xdr_error;
4238         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4239                 goto xdr_error;
4240
4241         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4242                 goto xdr_error;
4243         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4244                 goto xdr_error;
4245         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4246                 goto xdr_error;
4247         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4248                 goto xdr_error;
4249         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4250                 goto xdr_error;
4251         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4252                 goto xdr_error;
4253
4254         status = verify_attr_len(xdr, savep, attrlen);
4255 xdr_error:
4256         dprintk("%s: xdr returned %d!\n", __func__, -status);
4257         return status;
4258 }
4259
4260 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4261 {
4262         __be32 *savep;
4263         uint32_t attrlen, bitmap[3] = {0};
4264         int status;
4265
4266         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4267                 goto xdr_error;
4268         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4269                 goto xdr_error;
4270         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4271                 goto xdr_error;
4272
4273         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4274                 goto xdr_error;
4275         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4276                 goto xdr_error;
4277
4278         status = verify_attr_len(xdr, savep, attrlen);
4279 xdr_error:
4280         dprintk("%s: xdr returned %d!\n", __func__, -status);
4281         return status;
4282 }
4283
4284 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4285                 struct nfs_fattr *fattr, struct nfs_fh *fh,
4286                 const struct nfs_server *server, int may_sleep)
4287 {
4288         int status;
4289         umode_t fmode = 0;
4290         uint32_t type;
4291         int32_t err;
4292
4293         status = decode_attr_type(xdr, bitmap, &type);
4294         if (status < 0)
4295                 goto xdr_error;
4296         fattr->mode = 0;
4297         if (status != 0) {
4298                 fattr->mode |= nfs_type2fmt[type];
4299                 fattr->valid |= status;
4300         }
4301
4302         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4303         if (status < 0)
4304                 goto xdr_error;
4305         fattr->valid |= status;
4306
4307         status = decode_attr_size(xdr, bitmap, &fattr->size);
4308         if (status < 0)
4309                 goto xdr_error;
4310         fattr->valid |= status;
4311
4312         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4313         if (status < 0)
4314                 goto xdr_error;
4315         fattr->valid |= status;
4316
4317         err = 0;
4318         status = decode_attr_error(xdr, bitmap, &err);
4319         if (status < 0)
4320                 goto xdr_error;
4321         if (err == -NFS4ERR_WRONGSEC)
4322                 nfs_fixup_secinfo_attributes(fattr, fh);
4323
4324         status = decode_attr_filehandle(xdr, bitmap, fh);
4325         if (status < 0)
4326                 goto xdr_error;
4327
4328         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4329         if (status < 0)
4330                 goto xdr_error;
4331         fattr->valid |= status;
4332
4333         status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
4334                                                 struct nfs4_fs_locations,
4335                                                 fattr));
4336         if (status < 0)
4337                 goto xdr_error;
4338         fattr->valid |= status;
4339
4340         status = decode_attr_mode(xdr, bitmap, &fmode);
4341         if (status < 0)
4342                 goto xdr_error;
4343         if (status != 0) {
4344                 fattr->mode |= fmode;
4345                 fattr->valid |= status;
4346         }
4347
4348         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4349         if (status < 0)
4350                 goto xdr_error;
4351         fattr->valid |= status;
4352
4353         status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, may_sleep);
4354         if (status < 0)
4355                 goto xdr_error;
4356         fattr->valid |= status;
4357
4358         status = decode_attr_group(xdr, bitmap, server, &fattr->gid, may_sleep);
4359         if (status < 0)
4360                 goto xdr_error;
4361         fattr->valid |= status;
4362
4363         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4364         if (status < 0)
4365                 goto xdr_error;
4366         fattr->valid |= status;
4367
4368         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4369         if (status < 0)
4370                 goto xdr_error;
4371         fattr->valid |= status;
4372
4373         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4374         if (status < 0)
4375                 goto xdr_error;
4376         fattr->valid |= status;
4377
4378         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4379         if (status < 0)
4380                 goto xdr_error;
4381         fattr->valid |= status;
4382
4383         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4384         if (status < 0)
4385                 goto xdr_error;
4386         fattr->valid |= status;
4387
4388         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4389         if (status < 0)
4390                 goto xdr_error;
4391         fattr->valid |= status;
4392
4393 xdr_error:
4394         dprintk("%s: xdr returned %d\n", __func__, -status);
4395         return status;
4396 }
4397
4398 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4399                 struct nfs_fh *fh, const struct nfs_server *server, int may_sleep)
4400 {
4401         __be32 *savep;
4402         uint32_t attrlen,
4403                  bitmap[3] = {0};
4404         int status;
4405
4406         status = decode_op_hdr(xdr, OP_GETATTR);
4407         if (status < 0)
4408                 goto xdr_error;
4409
4410         status = decode_attr_bitmap(xdr, bitmap);
4411         if (status < 0)
4412                 goto xdr_error;
4413
4414         status = decode_attr_length(xdr, &attrlen, &savep);
4415         if (status < 0)
4416                 goto xdr_error;
4417
4418         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, server, may_sleep);
4419         if (status < 0)
4420                 goto xdr_error;
4421
4422         status = verify_attr_len(xdr, savep, attrlen);
4423 xdr_error:
4424         dprintk("%s: xdr returned %d\n", __func__, -status);
4425         return status;
4426 }
4427
4428 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4429                 const struct nfs_server *server, int may_sleep)
4430 {
4431         return decode_getfattr_generic(xdr, fattr, NULL, server, may_sleep);
4432 }
4433
4434 /*
4435  * Decode potentially multiple layout types. Currently we only support
4436  * one layout driver per file system.
4437  */
4438 static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4439                                          uint32_t *layouttype)
4440 {
4441         uint32_t *p;
4442         int num;
4443
4444         p = xdr_inline_decode(xdr, 4);
4445         if (unlikely(!p))
4446                 goto out_overflow;
4447         num = be32_to_cpup(p);
4448
4449         /* pNFS is not supported by the underlying file system */
4450         if (num == 0) {
4451                 *layouttype = 0;
4452                 return 0;
4453         }
4454         if (num > 1)
4455                 printk(KERN_INFO "%s: Warning: Multiple pNFS layout drivers "
4456                         "per filesystem not supported\n", __func__);
4457
4458         /* Decode and set first layout type, move xdr->p past unused types */
4459         p = xdr_inline_decode(xdr, num * 4);
4460         if (unlikely(!p))
4461                 goto out_overflow;
4462         *layouttype = be32_to_cpup(p);
4463         return 0;
4464 out_overflow:
4465         print_overflow_msg(__func__, xdr);
4466         return -EIO;
4467 }
4468
4469 /*
4470  * The type of file system exported.
4471  * Note we must ensure that layouttype is set in any non-error case.
4472  */
4473 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4474                                 uint32_t *layouttype)
4475 {
4476         int status = 0;
4477
4478         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4479         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4480                 return -EIO;
4481         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4482                 status = decode_first_pnfs_layout_type(xdr, layouttype);
4483                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4484         } else
4485                 *layouttype = 0;
4486         return status;
4487 }
4488
4489 /*
4490  * The prefered block size for layout directed io
4491  */
4492 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4493                                       uint32_t *res)
4494 {
4495         __be32 *p;
4496
4497         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4498         *res = 0;
4499         if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4500                 p = xdr_inline_decode(xdr, 4);
4501                 if (unlikely(!p)) {
4502                         print_overflow_msg(__func__, xdr);
4503                         return -EIO;
4504                 }
4505                 *res = be32_to_cpup(p);
4506                 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4507         }
4508         return 0;
4509 }
4510
4511 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4512 {
4513         __be32 *savep;
4514         uint32_t attrlen, bitmap[3];
4515         int status;
4516
4517         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4518                 goto xdr_error;
4519         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4520                 goto xdr_error;
4521         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4522                 goto xdr_error;
4523
4524         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4525
4526         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4527                 goto xdr_error;
4528         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4529                 goto xdr_error;
4530         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4531                 goto xdr_error;
4532         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4533         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4534                 goto xdr_error;
4535         fsinfo->wtpref = fsinfo->wtmax;
4536         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4537         if (status != 0)
4538                 goto xdr_error;
4539         status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4540         if (status != 0)
4541                 goto xdr_error;
4542         status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4543         if (status)
4544                 goto xdr_error;
4545
4546         status = verify_attr_len(xdr, savep, attrlen);
4547 xdr_error:
4548         dprintk("%s: xdr returned %d!\n", __func__, -status);
4549         return status;
4550 }
4551
4552 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4553 {
4554         __be32 *p;
4555         uint32_t len;
4556         int status;
4557
4558         /* Zero handle first to allow comparisons */
4559         memset(fh, 0, sizeof(*fh));
4560
4561         status = decode_op_hdr(xdr, OP_GETFH);
4562         if (status)
4563                 return status;
4564
4565         p = xdr_inline_decode(xdr, 4);
4566         if (unlikely(!p))
4567                 goto out_overflow;
4568         len = be32_to_cpup(p);
4569         if (len > NFS4_FHSIZE)
4570                 return -EIO;
4571         fh->size = len;
4572         p = xdr_inline_decode(xdr, len);
4573         if (unlikely(!p))
4574                 goto out_overflow;
4575         memcpy(fh->data, p, len);
4576         return 0;
4577 out_overflow:
4578         print_overflow_msg(__func__, xdr);
4579         return -EIO;
4580 }
4581
4582 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4583 {
4584         int status;
4585
4586         status = decode_op_hdr(xdr, OP_LINK);
4587         if (status)
4588                 return status;
4589         return decode_change_info(xdr, cinfo);
4590 }
4591
4592 /*
4593  * We create the owner, so we know a proper owner.id length is 4.
4594  */
4595 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4596 {
4597         uint64_t offset, length, clientid;
4598         __be32 *p;
4599         uint32_t namelen, type;
4600
4601         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4602         if (unlikely(!p))
4603                 goto out_overflow;
4604         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4605         p = xdr_decode_hyper(p, &length);
4606         type = be32_to_cpup(p++); /* 4 byte read */
4607         if (fl != NULL) { /* manipulate file lock */
4608                 fl->fl_start = (loff_t)offset;
4609                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4610                 if (length == ~(uint64_t)0)
4611                         fl->fl_end = OFFSET_MAX;
4612                 fl->fl_type = F_WRLCK;
4613                 if (type & 1)
4614                         fl->fl_type = F_RDLCK;
4615                 fl->fl_pid = 0;
4616         }
4617         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4618         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4619         p = xdr_inline_decode(xdr, namelen); /* variable size field */
4620         if (likely(p))
4621                 return -NFS4ERR_DENIED;
4622 out_overflow:
4623         print_overflow_msg(__func__, xdr);
4624         return -EIO;
4625 }
4626
4627 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4628 {
4629         int status;
4630
4631         status = decode_op_hdr(xdr, OP_LOCK);
4632         if (status == -EIO)
4633                 goto out;
4634         if (status == 0) {
4635                 status = decode_stateid(xdr, &res->stateid);
4636                 if (unlikely(status))
4637                         goto out;
4638         } else if (status == -NFS4ERR_DENIED)
4639                 status = decode_lock_denied(xdr, NULL);
4640         if (res->open_seqid != NULL)
4641                 nfs_increment_open_seqid(status, res->open_seqid);
4642         nfs_increment_lock_seqid(status, res->lock_seqid);
4643 out:
4644         return status;
4645 }
4646
4647 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4648 {
4649         int status;
4650         status = decode_op_hdr(xdr, OP_LOCKT);
4651         if (status == -NFS4ERR_DENIED)
4652                 return decode_lock_denied(xdr, res->denied);
4653         return status;
4654 }
4655
4656 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4657 {
4658         int status;
4659
4660         status = decode_op_hdr(xdr, OP_LOCKU);
4661         if (status != -EIO)
4662                 nfs_increment_lock_seqid(status, res->seqid);
4663         if (status == 0)
4664                 status = decode_stateid(xdr, &res->stateid);
4665         return status;
4666 }
4667
4668 static int decode_release_lockowner(struct xdr_stream *xdr)
4669 {
4670         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4671 }
4672
4673 static int decode_lookup(struct xdr_stream *xdr)
4674 {
4675         return decode_op_hdr(xdr, OP_LOOKUP);
4676 }
4677
4678 /* This is too sick! */
4679 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4680 {
4681         __be32 *p;
4682         uint32_t limit_type, nblocks, blocksize;
4683
4684         p = xdr_inline_decode(xdr, 12);
4685         if (unlikely(!p))
4686                 goto out_overflow;
4687         limit_type = be32_to_cpup(p++);
4688         switch (limit_type) {
4689         case 1:
4690                 xdr_decode_hyper(p, maxsize);
4691                 break;
4692         case 2:
4693                 nblocks = be32_to_cpup(p++);
4694                 blocksize = be32_to_cpup(p);
4695                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4696         }
4697         return 0;
4698 out_overflow:
4699         print_overflow_msg(__func__, xdr);
4700         return -EIO;
4701 }
4702
4703 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4704 {
4705         __be32 *p;
4706         uint32_t delegation_type;
4707         int status;
4708
4709         p = xdr_inline_decode(xdr, 4);
4710         if (unlikely(!p))
4711                 goto out_overflow;
4712         delegation_type = be32_to_cpup(p);
4713         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4714                 res->delegation_type = 0;
4715                 return 0;
4716         }
4717         status = decode_stateid(xdr, &res->delegation);
4718         if (unlikely(status))
4719                 return status;
4720         p = xdr_inline_decode(xdr, 4);
4721         if (unlikely(!p))
4722                 goto out_overflow;
4723         res->do_recall = be32_to_cpup(p);
4724
4725         switch (delegation_type) {
4726         case NFS4_OPEN_DELEGATE_READ:
4727                 res->delegation_type = FMODE_READ;
4728                 break;
4729         case NFS4_OPEN_DELEGATE_WRITE:
4730                 res->delegation_type = FMODE_WRITE|FMODE_READ;
4731                 if (decode_space_limit(xdr, &res->maxsize) < 0)
4732                                 return -EIO;
4733         }
4734         return decode_ace(xdr, NULL, res->server->nfs_client);
4735 out_overflow:
4736         print_overflow_msg(__func__, xdr);
4737         return -EIO;
4738 }
4739
4740 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
4741 {
4742         __be32 *p;
4743         uint32_t savewords, bmlen, i;
4744         int status;
4745
4746         status = decode_op_hdr(xdr, OP_OPEN);
4747         if (status != -EIO)
4748                 nfs_increment_open_seqid(status, res->seqid);
4749         if (!status)
4750                 status = decode_stateid(xdr, &res->stateid);
4751         if (unlikely(status))
4752                 return status;
4753
4754         decode_change_info(xdr, &res->cinfo);
4755
4756         p = xdr_inline_decode(xdr, 8);
4757         if (unlikely(!p))
4758                 goto out_overflow;
4759         res->rflags = be32_to_cpup(p++);
4760         bmlen = be32_to_cpup(p);
4761         if (bmlen > 10)
4762                 goto xdr_error;
4763
4764         p = xdr_inline_decode(xdr, bmlen << 2);
4765         if (unlikely(!p))
4766                 goto out_overflow;
4767         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
4768         for (i = 0; i < savewords; ++i)
4769                 res->attrset[i] = be32_to_cpup(p++);
4770         for (; i < NFS4_BITMAP_SIZE; i++)
4771                 res->attrset[i] = 0;
4772
4773         return decode_delegation(xdr, res);
4774 xdr_error:
4775         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
4776         return -EIO;
4777 out_overflow:
4778         print_overflow_msg(__func__, xdr);
4779         return -EIO;
4780 }
4781
4782 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
4783 {
4784         int status;
4785
4786         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
4787         if (status != -EIO)
4788                 nfs_increment_open_seqid(status, res->seqid);
4789         if (!status)
4790                 status = decode_stateid(xdr, &res->stateid);
4791         return status;
4792 }
4793
4794 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
4795 {
4796         int status;
4797
4798         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
4799         if (status != -EIO)
4800                 nfs_increment_open_seqid(status, res->seqid);
4801         if (!status)
4802                 status = decode_stateid(xdr, &res->stateid);
4803         return status;
4804 }
4805
4806 static int decode_putfh(struct xdr_stream *xdr)
4807 {
4808         return decode_op_hdr(xdr, OP_PUTFH);
4809 }
4810
4811 static int decode_putrootfh(struct xdr_stream *xdr)
4812 {
4813         return decode_op_hdr(xdr, OP_PUTROOTFH);
4814 }
4815
4816 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
4817 {
4818         struct kvec *iov = req->rq_rcv_buf.head;
4819         __be32 *p;
4820         uint32_t count, eof, recvd, hdrlen;
4821         int status;
4822
4823         status = decode_op_hdr(xdr, OP_READ);
4824         if (status)
4825                 return status;
4826         p = xdr_inline_decode(xdr, 8);
4827         if (unlikely(!p))
4828                 goto out_overflow;
4829         eof = be32_to_cpup(p++);
4830         count = be32_to_cpup(p);
4831         hdrlen = (u8 *) xdr->p - (u8 *) iov->iov_base;
4832         recvd = req->rq_rcv_buf.len - hdrlen;
4833         if (count > recvd) {
4834                 dprintk("NFS: server cheating in read reply: "
4835                                 "count %u > recvd %u\n", count, recvd);
4836                 count = recvd;
4837                 eof = 0;
4838         }
4839         xdr_read_pages(xdr, count);
4840         res->eof = eof;
4841         res->count = count;
4842         return 0;
4843 out_overflow:
4844         print_overflow_msg(__func__, xdr);
4845         return -EIO;
4846 }
4847
4848 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
4849 {
4850         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
4851         struct kvec     *iov = rcvbuf->head;
4852         size_t          hdrlen;
4853         u32             recvd, pglen = rcvbuf->page_len;
4854         int             status;
4855
4856         status = decode_op_hdr(xdr, OP_READDIR);
4857         if (!status)
4858                 status = decode_verifier(xdr, readdir->verifier.data);
4859         if (unlikely(status))
4860                 return status;
4861         dprintk("%s: verifier = %08x:%08x\n",
4862                         __func__,
4863                         ((u32 *)readdir->verifier.data)[0],
4864                         ((u32 *)readdir->verifier.data)[1]);
4865
4866
4867         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4868         recvd = rcvbuf->len - hdrlen;
4869         if (pglen > recvd)
4870                 pglen = recvd;
4871         xdr_read_pages(xdr, pglen);
4872
4873
4874         return pglen;
4875 }
4876
4877 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
4878 {
4879         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4880         struct kvec *iov = rcvbuf->head;
4881         size_t hdrlen;
4882         u32 len, recvd;
4883         __be32 *p;
4884         int status;
4885
4886         status = decode_op_hdr(xdr, OP_READLINK);
4887         if (status)
4888                 return status;
4889
4890         /* Convert length of symlink */
4891         p = xdr_inline_decode(xdr, 4);
4892         if (unlikely(!p))
4893                 goto out_overflow;
4894         len = be32_to_cpup(p);
4895         if (len >= rcvbuf->page_len || len <= 0) {
4896                 dprintk("nfs: server returned giant symlink!\n");
4897                 return -ENAMETOOLONG;
4898         }
4899         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4900         recvd = req->rq_rcv_buf.len - hdrlen;
4901         if (recvd < len) {
4902                 dprintk("NFS: server cheating in readlink reply: "
4903                                 "count %u > recvd %u\n", len, recvd);
4904                 return -EIO;
4905         }
4906         xdr_read_pages(xdr, len);
4907         /*
4908          * The XDR encode routine has set things up so that
4909          * the link text will be copied directly into the
4910          * buffer.  We just have to do overflow-checking,
4911          * and and null-terminate the text (the VFS expects
4912          * null-termination).
4913          */
4914         xdr_terminate_string(rcvbuf, len);
4915         return 0;
4916 out_overflow:
4917         print_overflow_msg(__func__, xdr);
4918         return -EIO;
4919 }
4920
4921 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4922 {
4923         int status;
4924
4925         status = decode_op_hdr(xdr, OP_REMOVE);
4926         if (status)
4927                 goto out;
4928         status = decode_change_info(xdr, cinfo);
4929 out:
4930         return status;
4931 }
4932
4933 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
4934               struct nfs4_change_info *new_cinfo)
4935 {
4936         int status;
4937
4938         status = decode_op_hdr(xdr, OP_RENAME);
4939         if (status)
4940                 goto out;
4941         if ((status = decode_change_info(xdr, old_cinfo)))
4942                 goto out;
4943         status = decode_change_info(xdr, new_cinfo);
4944 out:
4945         return status;
4946 }
4947
4948 static int decode_renew(struct xdr_stream *xdr)
4949 {
4950         return decode_op_hdr(xdr, OP_RENEW);
4951 }
4952
4953 static int
4954 decode_restorefh(struct xdr_stream *xdr)
4955 {
4956         return decode_op_hdr(xdr, OP_RESTOREFH);
4957 }
4958
4959 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
4960                 size_t *acl_len)
4961 {
4962         __be32 *savep;
4963         uint32_t attrlen,
4964                  bitmap[3] = {0};
4965         struct kvec *iov = req->rq_rcv_buf.head;
4966         int status;
4967
4968         *acl_len = 0;
4969         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4970                 goto out;
4971         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4972                 goto out;
4973         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4974                 goto out;
4975
4976         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
4977                 return -EIO;
4978         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
4979                 size_t hdrlen;
4980                 u32 recvd;
4981
4982                 /* We ignore &savep and don't do consistency checks on
4983                  * the attr length.  Let userspace figure it out.... */
4984                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
4985                 recvd = req->rq_rcv_buf.len - hdrlen;
4986                 if (attrlen > recvd) {
4987                         dprintk("NFS: server cheating in getattr"
4988                                         " acl reply: attrlen %u > recvd %u\n",
4989                                         attrlen, recvd);
4990                         return -EINVAL;
4991                 }
4992                 xdr_read_pages(xdr, attrlen);
4993                 *acl_len = attrlen;
4994         } else
4995                 status = -EOPNOTSUPP;
4996
4997 out:
4998         return status;
4999 }
5000
5001 static int
5002 decode_savefh(struct xdr_stream *xdr)
5003 {
5004         return decode_op_hdr(xdr, OP_SAVEFH);
5005 }
5006
5007 static int decode_setattr(struct xdr_stream *xdr)
5008 {
5009         __be32 *p;
5010         uint32_t bmlen;
5011         int status;
5012
5013         status = decode_op_hdr(xdr, OP_SETATTR);
5014         if (status)
5015                 return status;
5016         p = xdr_inline_decode(xdr, 4);
5017         if (unlikely(!p))
5018                 goto out_overflow;
5019         bmlen = be32_to_cpup(p);
5020         p = xdr_inline_decode(xdr, bmlen << 2);
5021         if (likely(p))
5022                 return 0;
5023 out_overflow:
5024         print_overflow_msg(__func__, xdr);
5025         return -EIO;
5026 }
5027
5028 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5029 {
5030         __be32 *p;
5031         uint32_t opnum;
5032         int32_t nfserr;
5033
5034         p = xdr_inline_decode(xdr, 8);
5035         if (unlikely(!p))
5036                 goto out_overflow;
5037         opnum = be32_to_cpup(p++);
5038         if (opnum != OP_SETCLIENTID) {
5039                 dprintk("nfs: decode_setclientid: Server returned operation"
5040                         " %d\n", opnum);
5041                 return -EIO;
5042         }
5043         nfserr = be32_to_cpup(p);
5044         if (nfserr == NFS_OK) {
5045                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5046                 if (unlikely(!p))
5047                         goto out_overflow;
5048                 p = xdr_decode_hyper(p, &res->clientid);
5049                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5050         } else if (nfserr == NFSERR_CLID_INUSE) {
5051                 uint32_t len;
5052
5053                 /* skip netid string */
5054                 p = xdr_inline_decode(xdr, 4);
5055                 if (unlikely(!p))
5056                         goto out_overflow;
5057                 len = be32_to_cpup(p);
5058                 p = xdr_inline_decode(xdr, len);
5059                 if (unlikely(!p))
5060                         goto out_overflow;
5061
5062                 /* skip uaddr string */
5063                 p = xdr_inline_decode(xdr, 4);
5064                 if (unlikely(!p))
5065                         goto out_overflow;
5066                 len = be32_to_cpup(p);
5067                 p = xdr_inline_decode(xdr, len);
5068                 if (unlikely(!p))
5069                         goto out_overflow;
5070                 return -NFSERR_CLID_INUSE;
5071         } else
5072                 return nfs4_stat_to_errno(nfserr);
5073
5074         return 0;
5075 out_overflow:
5076         print_overflow_msg(__func__, xdr);
5077         return -EIO;
5078 }
5079
5080 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5081 {
5082         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5083 }
5084
5085 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
5086 {
5087         __be32 *p;
5088         int status;
5089
5090         status = decode_op_hdr(xdr, OP_WRITE);
5091         if (status)
5092                 return status;
5093
5094         p = xdr_inline_decode(xdr, 16);
5095         if (unlikely(!p))
5096                 goto out_overflow;
5097         res->count = be32_to_cpup(p++);
5098         res->verf->committed = be32_to_cpup(p++);
5099         memcpy(res->verf->verifier, p, 8);
5100         return 0;
5101 out_overflow:
5102         print_overflow_msg(__func__, xdr);
5103         return -EIO;
5104 }
5105
5106 static int decode_delegreturn(struct xdr_stream *xdr)
5107 {
5108         return decode_op_hdr(xdr, OP_DELEGRETURN);
5109 }
5110
5111 static int decode_secinfo_gss(struct xdr_stream *xdr, struct nfs4_secinfo_flavor *flavor)
5112 {
5113         __be32 *p;
5114
5115         p = xdr_inline_decode(xdr, 4);
5116         if (unlikely(!p))
5117                 goto out_overflow;
5118         flavor->gss.sec_oid4.len = be32_to_cpup(p);
5119         if (flavor->gss.sec_oid4.len > GSS_OID_MAX_LEN)
5120                 goto out_err;
5121
5122         p = xdr_inline_decode(xdr, flavor->gss.sec_oid4.len);
5123         if (unlikely(!p))
5124                 goto out_overflow;
5125         memcpy(flavor->gss.sec_oid4.data, p, flavor->gss.sec_oid4.len);
5126
5127         p = xdr_inline_decode(xdr, 8);
5128         if (unlikely(!p))
5129                 goto out_overflow;
5130         flavor->gss.qop4 = be32_to_cpup(p++);
5131         flavor->gss.service = be32_to_cpup(p);
5132
5133         return 0;
5134
5135 out_overflow:
5136         print_overflow_msg(__func__, xdr);
5137         return -EIO;
5138 out_err:
5139         return -EINVAL;
5140 }
5141
5142 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5143 {
5144         struct nfs4_secinfo_flavor *sec_flavor;
5145         int status;
5146         __be32 *p;
5147         int i, num_flavors;
5148
5149         status = decode_op_hdr(xdr, OP_SECINFO);
5150         if (status)
5151                 goto out;
5152         p = xdr_inline_decode(xdr, 4);
5153         if (unlikely(!p))
5154                 goto out_overflow;
5155
5156         res->flavors->num_flavors = 0;
5157         num_flavors = be32_to_cpup(p);
5158
5159         for (i = 0; i < num_flavors; i++) {
5160                 sec_flavor = &res->flavors->flavors[i];
5161                 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5162                         break;
5163
5164                 p = xdr_inline_decode(xdr, 4);
5165                 if (unlikely(!p))
5166                         goto out_overflow;
5167                 sec_flavor->flavor = be32_to_cpup(p);
5168
5169                 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5170                         status = decode_secinfo_gss(xdr, sec_flavor);
5171                         if (status)
5172                                 goto out;
5173                 }
5174                 res->flavors->num_flavors++;
5175         }
5176
5177 out:
5178         return status;
5179 out_overflow:
5180         print_overflow_msg(__func__, xdr);
5181         return -EIO;
5182 }
5183
5184 #if defined(CONFIG_NFS_V4_1)
5185 static int decode_exchange_id(struct xdr_stream *xdr,
5186                               struct nfs41_exchange_id_res *res)
5187 {
5188         __be32 *p;
5189         uint32_t dummy;
5190         char *dummy_str;
5191         int status;
5192         struct nfs_client *clp = res->client;
5193
5194         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5195         if (status)
5196                 return status;
5197
5198         p = xdr_inline_decode(xdr, 8);
5199         if (unlikely(!p))
5200                 goto out_overflow;
5201         xdr_decode_hyper(p, &clp->cl_clientid);
5202         p = xdr_inline_decode(xdr, 12);
5203         if (unlikely(!p))
5204                 goto out_overflow;
5205         clp->cl_seqid = be32_to_cpup(p++);
5206         clp->cl_exchange_flags = be32_to_cpup(p++);
5207
5208         /* We ask for SP4_NONE */
5209         dummy = be32_to_cpup(p);
5210         if (dummy != SP4_NONE)
5211                 return -EIO;
5212
5213         /* Throw away minor_id */
5214         p = xdr_inline_decode(xdr, 8);
5215         if (unlikely(!p))
5216                 goto out_overflow;
5217
5218         /* Throw away Major id */
5219         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5220         if (unlikely(status))
5221                 return status;
5222
5223         /* Save server_scope */
5224         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5225         if (unlikely(status))
5226                 return status;
5227
5228         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5229                 return -EIO;
5230
5231         memcpy(res->server_scope->server_scope, dummy_str, dummy);
5232         res->server_scope->server_scope_sz = dummy;
5233
5234         /* Throw away Implementation id array */
5235         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5236         if (unlikely(status))
5237                 return status;
5238
5239         return 0;
5240 out_overflow:
5241         print_overflow_msg(__func__, xdr);
5242         return -EIO;
5243 }
5244
5245 static int decode_chan_attrs(struct xdr_stream *xdr,
5246                              struct nfs4_channel_attrs *attrs)
5247 {
5248         __be32 *p;
5249         u32 nr_attrs, val;
5250
5251         p = xdr_inline_decode(xdr, 28);
5252         if (unlikely(!p))
5253                 goto out_overflow;
5254         val = be32_to_cpup(p++);        /* headerpadsz */
5255         if (val)
5256                 return -EINVAL;         /* no support for header padding yet */
5257         attrs->max_rqst_sz = be32_to_cpup(p++);
5258         attrs->max_resp_sz = be32_to_cpup(p++);
5259         attrs->max_resp_sz_cached = be32_to_cpup(p++);
5260         attrs->max_ops = be32_to_cpup(p++);
5261         attrs->max_reqs = be32_to_cpup(p++);
5262         nr_attrs = be32_to_cpup(p);
5263         if (unlikely(nr_attrs > 1)) {
5264                 printk(KERN_WARNING "%s: Invalid rdma channel attrs count %u\n",
5265                         __func__, nr_attrs);
5266                 return -EINVAL;
5267         }
5268         if (nr_attrs == 1) {
5269                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5270                 if (unlikely(!p))
5271                         goto out_overflow;
5272         }
5273         return 0;
5274 out_overflow:
5275         print_overflow_msg(__func__, xdr);
5276         return -EIO;
5277 }
5278
5279 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5280 {
5281         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5282 }
5283
5284 static int decode_create_session(struct xdr_stream *xdr,
5285                                  struct nfs41_create_session_res *res)
5286 {
5287         __be32 *p;
5288         int status;
5289         struct nfs_client *clp = res->client;
5290         struct nfs4_session *session = clp->cl_session;
5291
5292         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5293         if (!status)
5294                 status = decode_sessionid(xdr, &session->sess_id);
5295         if (unlikely(status))
5296                 return status;
5297
5298         /* seqid, flags */
5299         p = xdr_inline_decode(xdr, 8);
5300         if (unlikely(!p))
5301                 goto out_overflow;
5302         clp->cl_seqid = be32_to_cpup(p++);
5303         session->flags = be32_to_cpup(p);
5304
5305         /* Channel attributes */
5306         status = decode_chan_attrs(xdr, &session->fc_attrs);
5307         if (!status)
5308                 status = decode_chan_attrs(xdr, &session->bc_attrs);
5309         return status;
5310 out_overflow:
5311         print_overflow_msg(__func__, xdr);
5312         return -EIO;
5313 }
5314
5315 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5316 {
5317         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5318 }
5319
5320 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5321 {
5322         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5323 }
5324 #endif /* CONFIG_NFS_V4_1 */
5325
5326 static int decode_sequence(struct xdr_stream *xdr,
5327                            struct nfs4_sequence_res *res,
5328                            struct rpc_rqst *rqstp)
5329 {
5330 #if defined(CONFIG_NFS_V4_1)
5331         struct nfs4_sessionid id;
5332         u32 dummy;
5333         int status;
5334         __be32 *p;
5335
5336         if (!res->sr_session)
5337                 return 0;
5338
5339         status = decode_op_hdr(xdr, OP_SEQUENCE);
5340         if (!status)
5341                 status = decode_sessionid(xdr, &id);
5342         if (unlikely(status))
5343                 goto out_err;
5344
5345         /*
5346          * If the server returns different values for sessionID, slotID or
5347          * sequence number, the server is looney tunes.
5348          */
5349         status = -EREMOTEIO;
5350
5351         if (memcmp(id.data, res->sr_session->sess_id.data,
5352                    NFS4_MAX_SESSIONID_LEN)) {
5353                 dprintk("%s Invalid session id\n", __func__);
5354                 goto out_err;
5355         }
5356
5357         p = xdr_inline_decode(xdr, 20);
5358         if (unlikely(!p))
5359                 goto out_overflow;
5360
5361         /* seqid */
5362         dummy = be32_to_cpup(p++);
5363         if (dummy != res->sr_slot->seq_nr) {
5364                 dprintk("%s Invalid sequence number\n", __func__);
5365                 goto out_err;
5366         }
5367         /* slot id */
5368         dummy = be32_to_cpup(p++);
5369         if (dummy != res->sr_slot - res->sr_session->fc_slot_table.slots) {
5370                 dprintk("%s Invalid slot id\n", __func__);
5371                 goto out_err;
5372         }
5373         /* highest slot id - currently not processed */
5374         dummy = be32_to_cpup(p++);
5375         /* target highest slot id - currently not processed */
5376         dummy = be32_to_cpup(p++);
5377         /* result flags */
5378         res->sr_status_flags = be32_to_cpup(p);
5379         status = 0;
5380 out_err:
5381         res->sr_status = status;
5382         return status;
5383 out_overflow:
5384         print_overflow_msg(__func__, xdr);
5385         status = -EIO;
5386         goto out_err;
5387 #else  /* CONFIG_NFS_V4_1 */
5388         return 0;
5389 #endif /* CONFIG_NFS_V4_1 */
5390 }
5391
5392 #if defined(CONFIG_NFS_V4_1)
5393 /*
5394  * TODO: Need to handle case when EOF != true;
5395  */
5396 static int decode_getdevicelist(struct xdr_stream *xdr,
5397                                 struct pnfs_devicelist *res)
5398 {
5399         __be32 *p;
5400         int status, i;
5401         struct nfs_writeverf verftemp;
5402
5403         status = decode_op_hdr(xdr, OP_GETDEVICELIST);
5404         if (status)
5405                 return status;
5406
5407         p = xdr_inline_decode(xdr, 8 + 8 + 4);
5408         if (unlikely(!p))
5409                 goto out_overflow;
5410
5411         /* TODO: Skip cookie for now */
5412         p += 2;
5413
5414         /* Read verifier */
5415         p = xdr_decode_opaque_fixed(p, verftemp.verifier, 8);
5416
5417         res->num_devs = be32_to_cpup(p);
5418
5419         dprintk("%s: num_dev %d\n", __func__, res->num_devs);
5420
5421         if (res->num_devs > NFS4_PNFS_GETDEVLIST_MAXNUM) {
5422                 printk(KERN_ERR "%s too many result dev_num %u\n",
5423                                 __func__, res->num_devs);
5424                 return -EIO;
5425         }
5426
5427         p = xdr_inline_decode(xdr,
5428                               res->num_devs * NFS4_DEVICEID4_SIZE + 4);
5429         if (unlikely(!p))
5430                 goto out_overflow;
5431         for (i = 0; i < res->num_devs; i++)
5432                 p = xdr_decode_opaque_fixed(p, res->dev_id[i].data,
5433                                             NFS4_DEVICEID4_SIZE);
5434         res->eof = be32_to_cpup(p);
5435         return 0;
5436 out_overflow:
5437         print_overflow_msg(__func__, xdr);
5438         return -EIO;
5439 }
5440
5441 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5442                                 struct pnfs_device *pdev)
5443 {
5444         __be32 *p;
5445         uint32_t len, type;
5446         int status;
5447
5448         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5449         if (status) {
5450                 if (status == -ETOOSMALL) {
5451                         p = xdr_inline_decode(xdr, 4);
5452                         if (unlikely(!p))
5453                                 goto out_overflow;
5454                         pdev->mincount = be32_to_cpup(p);
5455                         dprintk("%s: Min count too small. mincnt = %u\n",
5456                                 __func__, pdev->mincount);
5457                 }
5458                 return status;
5459         }
5460
5461         p = xdr_inline_decode(xdr, 8);
5462         if (unlikely(!p))
5463                 goto out_overflow;
5464         type = be32_to_cpup(p++);
5465         if (type != pdev->layout_type) {
5466                 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5467                         __func__, pdev->layout_type, type);
5468                 return -EINVAL;
5469         }
5470         /*
5471          * Get the length of the opaque device_addr4. xdr_read_pages places
5472          * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5473          * and places the remaining xdr data in xdr_buf->tail
5474          */
5475         pdev->mincount = be32_to_cpup(p);
5476         xdr_read_pages(xdr, pdev->mincount); /* include space for the length */
5477
5478         /* Parse notification bitmap, verifying that it is zero. */
5479         p = xdr_inline_decode(xdr, 4);
5480         if (unlikely(!p))
5481                 goto out_overflow;
5482         len = be32_to_cpup(p);
5483         if (len) {
5484                 uint32_t i;
5485
5486                 p = xdr_inline_decode(xdr, 4 * len);
5487                 if (unlikely(!p))
5488                         goto out_overflow;
5489                 for (i = 0; i < len; i++, p++) {
5490                         if (be32_to_cpup(p)) {
5491                                 dprintk("%s: notifications not supported\n",
5492                                         __func__);
5493                                 return -EIO;
5494                         }
5495                 }
5496         }
5497         return 0;
5498 out_overflow:
5499         print_overflow_msg(__func__, xdr);
5500         return -EIO;
5501 }
5502
5503 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5504                             struct nfs4_layoutget_res *res)
5505 {
5506         __be32 *p;
5507         int status;
5508         u32 layout_count;
5509         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5510         struct kvec *iov = rcvbuf->head;
5511         u32 hdrlen, recvd;
5512
5513         status = decode_op_hdr(xdr, OP_LAYOUTGET);
5514         if (status)
5515                 return status;
5516         p = xdr_inline_decode(xdr, 8 + NFS4_STATEID_SIZE);
5517         if (unlikely(!p))
5518                 goto out_overflow;
5519         res->return_on_close = be32_to_cpup(p++);
5520         p = xdr_decode_opaque_fixed(p, res->stateid.data, NFS4_STATEID_SIZE);
5521         layout_count = be32_to_cpup(p);
5522         if (!layout_count) {
5523                 dprintk("%s: server responded with empty layout array\n",
5524                         __func__);
5525                 return -EINVAL;
5526         }
5527
5528         p = xdr_inline_decode(xdr, 28);
5529         if (unlikely(!p))
5530                 goto out_overflow;
5531         p = xdr_decode_hyper(p, &res->range.offset);
5532         p = xdr_decode_hyper(p, &res->range.length);
5533         res->range.iomode = be32_to_cpup(p++);
5534         res->type = be32_to_cpup(p++);
5535         res->layoutp->len = be32_to_cpup(p);
5536
5537         dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5538                 __func__,
5539                 (unsigned long)res->range.offset,
5540                 (unsigned long)res->range.length,
5541                 res->range.iomode,
5542                 res->type,
5543                 res->layoutp->len);
5544
5545         hdrlen = (u8 *) xdr->p - (u8 *) iov->iov_base;
5546         recvd = req->rq_rcv_buf.len - hdrlen;
5547         if (res->layoutp->len > recvd) {
5548                 dprintk("NFS: server cheating in layoutget reply: "
5549                                 "layout len %u > recvd %u\n",
5550                                 res->layoutp->len, recvd);
5551                 return -EINVAL;
5552         }
5553
5554         xdr_read_pages(xdr, res->layoutp->len);
5555
5556         if (layout_count > 1) {
5557                 /* We only handle a length one array at the moment.  Any
5558                  * further entries are just ignored.  Note that this means
5559                  * the client may see a response that is less than the
5560                  * minimum it requested.
5561                  */
5562                 dprintk("%s: server responded with %d layouts, dropping tail\n",
5563                         __func__, layout_count);
5564         }
5565
5566         return 0;
5567 out_overflow:
5568         print_overflow_msg(__func__, xdr);
5569         return -EIO;
5570 }
5571
5572 static int decode_layoutreturn(struct xdr_stream *xdr,
5573                                struct nfs4_layoutreturn_res *res)
5574 {
5575         __be32 *p;
5576         int status;
5577
5578         status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5579         if (status)
5580                 return status;
5581         p = xdr_inline_decode(xdr, 4);
5582         if (unlikely(!p))
5583                 goto out_overflow;
5584         res->lrs_present = be32_to_cpup(p);
5585         if (res->lrs_present)
5586                 status = decode_stateid(xdr, &res->stateid);
5587         return status;
5588 out_overflow:
5589         print_overflow_msg(__func__, xdr);
5590         return -EIO;
5591 }
5592
5593 static int decode_layoutcommit(struct xdr_stream *xdr,
5594                                struct rpc_rqst *req,
5595                                struct nfs4_layoutcommit_res *res)
5596 {
5597         __be32 *p;
5598         __u32 sizechanged;
5599         int status;
5600
5601         status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5602         res->status = status;
5603         if (status)
5604                 return status;
5605
5606         p = xdr_inline_decode(xdr, 4);
5607         if (unlikely(!p))
5608                 goto out_overflow;
5609         sizechanged = be32_to_cpup(p);
5610
5611         if (sizechanged) {
5612                 /* throw away new size */
5613                 p = xdr_inline_decode(xdr, 8);
5614                 if (unlikely(!p))
5615                         goto out_overflow;
5616         }
5617         return 0;
5618 out_overflow:
5619         print_overflow_msg(__func__, xdr);
5620         return -EIO;
5621 }
5622
5623 static int decode_test_stateid(struct xdr_stream *xdr,
5624                                struct nfs41_test_stateid_res *res)
5625 {
5626         __be32 *p;
5627         int status;
5628         int num_res;
5629
5630         status = decode_op_hdr(xdr, OP_TEST_STATEID);
5631         if (status)
5632                 return status;
5633
5634         p = xdr_inline_decode(xdr, 4);
5635         if (unlikely(!p))
5636                 goto out_overflow;
5637         num_res = be32_to_cpup(p++);
5638         if (num_res != 1)
5639                 goto out;
5640
5641         p = xdr_inline_decode(xdr, 4);
5642         if (unlikely(!p))
5643                 goto out_overflow;
5644         res->status = be32_to_cpup(p++);
5645         return res->status;
5646 out_overflow:
5647         print_overflow_msg(__func__, xdr);
5648 out:
5649         return -EIO;
5650 }
5651
5652 static int decode_free_stateid(struct xdr_stream *xdr,
5653                                struct nfs41_free_stateid_res *res)
5654 {
5655         __be32 *p;
5656         int status;
5657
5658         status = decode_op_hdr(xdr, OP_FREE_STATEID);
5659         if (status)
5660                 return status;
5661
5662         p = xdr_inline_decode(xdr, 4);
5663         if (unlikely(!p))
5664                 goto out_overflow;
5665         res->status = be32_to_cpup(p++);
5666         return res->status;
5667 out_overflow:
5668         print_overflow_msg(__func__, xdr);
5669         return -EIO;
5670 }
5671 #endif /* CONFIG_NFS_V4_1 */
5672
5673 /*
5674  * END OF "GENERIC" DECODE ROUTINES.
5675  */
5676
5677 /*
5678  * Decode OPEN_DOWNGRADE response
5679  */
5680 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
5681                                        struct xdr_stream *xdr,
5682                                        struct nfs_closeres *res)
5683 {
5684         struct compound_hdr hdr;
5685         int status;
5686
5687         status = decode_compound_hdr(xdr, &hdr);
5688         if (status)
5689                 goto out;
5690         status = decode_sequence(xdr, &res->seq_res, rqstp);
5691         if (status)
5692                 goto out;
5693         status = decode_putfh(xdr);
5694         if (status)
5695                 goto out;
5696         status = decode_open_downgrade(xdr, res);
5697         if (status != 0)
5698                 goto out;
5699         decode_getfattr(xdr, res->fattr, res->server,
5700                         !RPC_IS_ASYNC(rqstp->rq_task));
5701 out:
5702         return status;
5703 }
5704
5705 /*
5706  * Decode ACCESS response
5707  */
5708 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5709                                struct nfs4_accessres *res)
5710 {
5711         struct compound_hdr hdr;
5712         int status;
5713
5714         status = decode_compound_hdr(xdr, &hdr);
5715         if (status)
5716                 goto out;
5717         status = decode_sequence(xdr, &res->seq_res, rqstp);
5718         if (status)
5719                 goto out;
5720         status = decode_putfh(xdr);
5721         if (status != 0)
5722                 goto out;
5723         status = decode_access(xdr, res);
5724         if (status != 0)
5725                 goto out;
5726         decode_getfattr(xdr, res->fattr, res->server,
5727                         !RPC_IS_ASYNC(rqstp->rq_task));
5728 out:
5729         return status;
5730 }
5731
5732 /*
5733  * Decode LOOKUP response
5734  */
5735 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5736                                struct nfs4_lookup_res *res)
5737 {
5738         struct compound_hdr hdr;
5739         int status;
5740
5741         status = decode_compound_hdr(xdr, &hdr);
5742         if (status)
5743                 goto out;
5744         status = decode_sequence(xdr, &res->seq_res, rqstp);
5745         if (status)
5746                 goto out;
5747         status = decode_putfh(xdr);
5748         if (status)
5749                 goto out;
5750         status = decode_lookup(xdr);
5751         if (status)
5752                 goto out;
5753         status = decode_getfh(xdr, res->fh);
5754         if (status)
5755                 goto out;
5756         status = decode_getfattr(xdr, res->fattr, res->server
5757                         ,!RPC_IS_ASYNC(rqstp->rq_task));
5758 out:
5759         return status;
5760 }
5761
5762 /*
5763  * Decode LOOKUP_ROOT response
5764  */
5765 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
5766                                     struct xdr_stream *xdr,
5767                                     struct nfs4_lookup_res *res)
5768 {
5769         struct compound_hdr hdr;
5770         int status;
5771
5772         status = decode_compound_hdr(xdr, &hdr);
5773         if (status)
5774                 goto out;
5775         status = decode_sequence(xdr, &res->seq_res, rqstp);
5776         if (status)
5777                 goto out;
5778         status = decode_putrootfh(xdr);
5779         if (status)
5780                 goto out;
5781         status = decode_getfh(xdr, res->fh);
5782         if (status == 0)
5783                 status = decode_getfattr(xdr, res->fattr, res->server,
5784                                 !RPC_IS_ASYNC(rqstp->rq_task));
5785 out:
5786         return status;
5787 }
5788
5789 /*
5790  * Decode REMOVE response
5791  */
5792 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5793                                struct nfs_removeres *res)
5794 {
5795         struct compound_hdr hdr;
5796         int status;
5797
5798         status = decode_compound_hdr(xdr, &hdr);
5799         if (status)
5800                 goto out;
5801         status = decode_sequence(xdr, &res->seq_res, rqstp);
5802         if (status)
5803                 goto out;
5804         status = decode_putfh(xdr);
5805         if (status)
5806                 goto out;
5807         status = decode_remove(xdr, &res->cinfo);
5808         if (status)
5809                 goto out;
5810         decode_getfattr(xdr, res->dir_attr, res->server,
5811                         !RPC_IS_ASYNC(rqstp->rq_task));
5812 out:
5813         return status;
5814 }
5815
5816 /*
5817  * Decode RENAME response
5818  */
5819 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5820                                struct nfs_renameres *res)
5821 {
5822         struct compound_hdr hdr;
5823         int status;
5824
5825         status = decode_compound_hdr(xdr, &hdr);
5826         if (status)
5827                 goto out;
5828         status = decode_sequence(xdr, &res->seq_res, rqstp);
5829         if (status)
5830                 goto out;
5831         status = decode_putfh(xdr);
5832         if (status)
5833                 goto out;
5834         status = decode_savefh(xdr);
5835         if (status)
5836                 goto out;
5837         status = decode_putfh(xdr);
5838         if (status)
5839                 goto out;
5840         status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
5841         if (status)
5842                 goto out;
5843         /* Current FH is target directory */
5844         if (decode_getfattr(xdr, res->new_fattr, res->server,
5845                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5846                 goto out;
5847         status = decode_restorefh(xdr);
5848         if (status)
5849                 goto out;
5850         decode_getfattr(xdr, res->old_fattr, res->server,
5851                         !RPC_IS_ASYNC(rqstp->rq_task));
5852 out:
5853         return status;
5854 }
5855
5856 /*
5857  * Decode LINK response
5858  */
5859 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5860                              struct nfs4_link_res *res)
5861 {
5862         struct compound_hdr hdr;
5863         int status;
5864
5865         status = decode_compound_hdr(xdr, &hdr);
5866         if (status)
5867                 goto out;
5868         status = decode_sequence(xdr, &res->seq_res, rqstp);
5869         if (status)
5870                 goto out;
5871         status = decode_putfh(xdr);
5872         if (status)
5873                 goto out;
5874         status = decode_savefh(xdr);
5875         if (status)
5876                 goto out;
5877         status = decode_putfh(xdr);
5878         if (status)
5879                 goto out;
5880         status = decode_link(xdr, &res->cinfo);
5881         if (status)
5882                 goto out;
5883         /*
5884          * Note order: OP_LINK leaves the directory as the current
5885          *             filehandle.
5886          */
5887         if (decode_getfattr(xdr, res->dir_attr, res->server,
5888                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5889                 goto out;
5890         status = decode_restorefh(xdr);
5891         if (status)
5892                 goto out;
5893         decode_getfattr(xdr, res->fattr, res->server,
5894                         !RPC_IS_ASYNC(rqstp->rq_task));
5895 out:
5896         return status;
5897 }
5898
5899 /*
5900  * Decode CREATE response
5901  */
5902 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5903                                struct nfs4_create_res *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_savefh(xdr);
5918         if (status)
5919                 goto out;
5920         status = decode_create(xdr, &res->dir_cinfo);
5921         if (status)
5922                 goto out;
5923         status = decode_getfh(xdr, res->fh);
5924         if (status)
5925                 goto out;
5926         if (decode_getfattr(xdr, res->fattr, res->server,
5927                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5928                 goto out;
5929         status = decode_restorefh(xdr);
5930         if (status)
5931                 goto out;
5932         decode_getfattr(xdr, res->dir_fattr, res->server,
5933                         !RPC_IS_ASYNC(rqstp->rq_task));
5934 out:
5935         return status;
5936 }
5937
5938 /*
5939  * Decode SYMLINK response
5940  */
5941 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5942                                 struct nfs4_create_res *res)
5943 {
5944         return nfs4_xdr_dec_create(rqstp, xdr, res);
5945 }
5946
5947 /*
5948  * Decode GETATTR response
5949  */
5950 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5951                                 struct nfs4_getattr_res *res)
5952 {
5953         struct compound_hdr hdr;
5954         int status;
5955
5956         status = decode_compound_hdr(xdr, &hdr);
5957         if (status)
5958                 goto out;
5959         status = decode_sequence(xdr, &res->seq_res, rqstp);
5960         if (status)
5961                 goto out;
5962         status = decode_putfh(xdr);
5963         if (status)
5964                 goto out;
5965         status = decode_getfattr(xdr, res->fattr, res->server,
5966                         !RPC_IS_ASYNC(rqstp->rq_task));
5967 out:
5968         return status;
5969 }
5970
5971 /*
5972  * Encode an SETACL request
5973  */
5974 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
5975                                 struct nfs_setaclargs *args)
5976 {
5977         struct compound_hdr hdr = {
5978                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
5979         };
5980
5981         encode_compound_hdr(xdr, req, &hdr);
5982         encode_sequence(xdr, &args->seq_args, &hdr);
5983         encode_putfh(xdr, args->fh, &hdr);
5984         encode_setacl(xdr, args, &hdr);
5985         encode_nops(&hdr);
5986 }
5987
5988 /*
5989  * Decode SETACL response
5990  */
5991 static int
5992 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5993                     struct nfs_setaclres *res)
5994 {
5995         struct compound_hdr hdr;
5996         int status;
5997
5998         status = decode_compound_hdr(xdr, &hdr);
5999         if (status)
6000                 goto out;
6001         status = decode_sequence(xdr, &res->seq_res, rqstp);
6002         if (status)
6003                 goto out;
6004         status = decode_putfh(xdr);
6005         if (status)
6006                 goto out;
6007         status = decode_setattr(xdr);
6008 out:
6009         return status;
6010 }
6011
6012 /*
6013  * Decode GETACL response
6014  */
6015 static int
6016 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6017                     struct nfs_getaclres *res)
6018 {
6019         struct compound_hdr hdr;
6020         int status;
6021
6022         status = decode_compound_hdr(xdr, &hdr);
6023         if (status)
6024                 goto out;
6025         status = decode_sequence(xdr, &res->seq_res, rqstp);
6026         if (status)
6027                 goto out;
6028         status = decode_putfh(xdr);
6029         if (status)
6030                 goto out;
6031         status = decode_getacl(xdr, rqstp, &res->acl_len);
6032
6033 out:
6034         return status;
6035 }
6036
6037 /*
6038  * Decode CLOSE response
6039  */
6040 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6041                               struct nfs_closeres *res)
6042 {
6043         struct compound_hdr hdr;
6044         int status;
6045
6046         status = decode_compound_hdr(xdr, &hdr);
6047         if (status)
6048                 goto out;
6049         status = decode_sequence(xdr, &res->seq_res, rqstp);
6050         if (status)
6051                 goto out;
6052         status = decode_putfh(xdr);
6053         if (status)
6054                 goto out;
6055         status = decode_close(xdr, res);
6056         if (status != 0)
6057                 goto out;
6058         /*
6059          * Note: Server may do delete on close for this file
6060          *      in which case the getattr call will fail with
6061          *      an ESTALE error. Shouldn't be a problem,
6062          *      though, since fattr->valid will remain unset.
6063          */
6064         decode_getfattr(xdr, res->fattr, res->server,
6065                         !RPC_IS_ASYNC(rqstp->rq_task));
6066 out:
6067         return status;
6068 }
6069
6070 /*
6071  * Decode OPEN response
6072  */
6073 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6074                              struct nfs_openres *res)
6075 {
6076         struct compound_hdr hdr;
6077         int status;
6078
6079         status = decode_compound_hdr(xdr, &hdr);
6080         if (status)
6081                 goto out;
6082         status = decode_sequence(xdr, &res->seq_res, rqstp);
6083         if (status)
6084                 goto out;
6085         status = decode_putfh(xdr);
6086         if (status)
6087                 goto out;
6088         status = decode_savefh(xdr);
6089         if (status)
6090                 goto out;
6091         status = decode_open(xdr, res);
6092         if (status)
6093                 goto out;
6094         if (decode_getfh(xdr, &res->fh) != 0)
6095                 goto out;
6096         if (decode_getfattr(xdr, res->f_attr, res->server,
6097                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
6098                 goto out;
6099         if (decode_restorefh(xdr) != 0)
6100                 goto out;
6101         decode_getfattr(xdr, res->dir_attr, res->server,
6102                         !RPC_IS_ASYNC(rqstp->rq_task));
6103 out:
6104         return status;
6105 }
6106
6107 /*
6108  * Decode OPEN_CONFIRM response
6109  */
6110 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6111                                      struct xdr_stream *xdr,
6112                                      struct nfs_open_confirmres *res)
6113 {
6114         struct compound_hdr hdr;
6115         int status;
6116
6117         status = decode_compound_hdr(xdr, &hdr);
6118         if (status)
6119                 goto out;
6120         status = decode_putfh(xdr);
6121         if (status)
6122                 goto out;
6123         status = decode_open_confirm(xdr, res);
6124 out:
6125         return status;
6126 }
6127
6128 /*
6129  * Decode OPEN response
6130  */
6131 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6132                                     struct xdr_stream *xdr,
6133                                     struct nfs_openres *res)
6134 {
6135         struct compound_hdr hdr;
6136         int status;
6137
6138         status = decode_compound_hdr(xdr, &hdr);
6139         if (status)
6140                 goto out;
6141         status = decode_sequence(xdr, &res->seq_res, rqstp);
6142         if (status)
6143                 goto out;
6144         status = decode_putfh(xdr);
6145         if (status)
6146                 goto out;
6147         status = decode_open(xdr, res);
6148         if (status)
6149                 goto out;
6150         decode_getfattr(xdr, res->f_attr, res->server,
6151                         !RPC_IS_ASYNC(rqstp->rq_task));
6152 out:
6153         return status;
6154 }
6155
6156 /*
6157  * Decode SETATTR response
6158  */
6159 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6160                                 struct xdr_stream *xdr,
6161                                 struct nfs_setattrres *res)
6162 {
6163         struct compound_hdr hdr;
6164         int status;
6165
6166         status = decode_compound_hdr(xdr, &hdr);
6167         if (status)
6168                 goto out;
6169         status = decode_sequence(xdr, &res->seq_res, rqstp);
6170         if (status)
6171                 goto out;
6172         status = decode_putfh(xdr);
6173         if (status)
6174                 goto out;
6175         status = decode_setattr(xdr);
6176         if (status)
6177                 goto out;
6178         decode_getfattr(xdr, res->fattr, res->server,
6179                         !RPC_IS_ASYNC(rqstp->rq_task));
6180 out:
6181         return status;
6182 }
6183
6184 /*
6185  * Decode LOCK response
6186  */
6187 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6188                              struct nfs_lock_res *res)
6189 {
6190         struct compound_hdr hdr;
6191         int status;
6192
6193         status = decode_compound_hdr(xdr, &hdr);
6194         if (status)
6195                 goto out;
6196         status = decode_sequence(xdr, &res->seq_res, rqstp);
6197         if (status)
6198                 goto out;
6199         status = decode_putfh(xdr);
6200         if (status)
6201                 goto out;
6202         status = decode_lock(xdr, res);
6203 out:
6204         return status;
6205 }
6206
6207 /*
6208  * Decode LOCKT response
6209  */
6210 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6211                               struct nfs_lockt_res *res)
6212 {
6213         struct compound_hdr hdr;
6214         int status;
6215
6216         status = decode_compound_hdr(xdr, &hdr);
6217         if (status)
6218                 goto out;
6219         status = decode_sequence(xdr, &res->seq_res, rqstp);
6220         if (status)
6221                 goto out;
6222         status = decode_putfh(xdr);
6223         if (status)
6224                 goto out;
6225         status = decode_lockt(xdr, res);
6226 out:
6227         return status;
6228 }
6229
6230 /*
6231  * Decode LOCKU response
6232  */
6233 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6234                               struct nfs_locku_res *res)
6235 {
6236         struct compound_hdr hdr;
6237         int status;
6238
6239         status = decode_compound_hdr(xdr, &hdr);
6240         if (status)
6241                 goto out;
6242         status = decode_sequence(xdr, &res->seq_res, rqstp);
6243         if (status)
6244                 goto out;
6245         status = decode_putfh(xdr);
6246         if (status)
6247                 goto out;
6248         status = decode_locku(xdr, res);
6249 out:
6250         return status;
6251 }
6252
6253 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6254                                           struct xdr_stream *xdr, void *dummy)
6255 {
6256         struct compound_hdr hdr;
6257         int status;
6258
6259         status = decode_compound_hdr(xdr, &hdr);
6260         if (!status)
6261                 status = decode_release_lockowner(xdr);
6262         return status;
6263 }
6264
6265 /*
6266  * Decode READLINK response
6267  */
6268 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6269                                  struct xdr_stream *xdr,
6270                                  struct nfs4_readlink_res *res)
6271 {
6272         struct compound_hdr hdr;
6273         int status;
6274
6275         status = decode_compound_hdr(xdr, &hdr);
6276         if (status)
6277                 goto out;
6278         status = decode_sequence(xdr, &res->seq_res, rqstp);
6279         if (status)
6280                 goto out;
6281         status = decode_putfh(xdr);
6282         if (status)
6283                 goto out;
6284         status = decode_readlink(xdr, rqstp);
6285 out:
6286         return status;
6287 }
6288
6289 /*
6290  * Decode READDIR response
6291  */
6292 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6293                                 struct nfs4_readdir_res *res)
6294 {
6295         struct compound_hdr hdr;
6296         int status;
6297
6298         status = decode_compound_hdr(xdr, &hdr);
6299         if (status)
6300                 goto out;
6301         status = decode_sequence(xdr, &res->seq_res, rqstp);
6302         if (status)
6303                 goto out;
6304         status = decode_putfh(xdr);
6305         if (status)
6306                 goto out;
6307         status = decode_readdir(xdr, rqstp, res);
6308 out:
6309         return status;
6310 }
6311
6312 /*
6313  * Decode Read response
6314  */
6315 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6316                              struct nfs_readres *res)
6317 {
6318         struct compound_hdr hdr;
6319         int status;
6320
6321         status = decode_compound_hdr(xdr, &hdr);
6322         if (status)
6323                 goto out;
6324         status = decode_sequence(xdr, &res->seq_res, rqstp);
6325         if (status)
6326                 goto out;
6327         status = decode_putfh(xdr);
6328         if (status)
6329                 goto out;
6330         status = decode_read(xdr, rqstp, res);
6331         if (!status)
6332                 status = res->count;
6333 out:
6334         return status;
6335 }
6336
6337 /*
6338  * Decode WRITE response
6339  */
6340 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6341                               struct nfs_writeres *res)
6342 {
6343         struct compound_hdr hdr;
6344         int status;
6345
6346         status = decode_compound_hdr(xdr, &hdr);
6347         if (status)
6348                 goto out;
6349         status = decode_sequence(xdr, &res->seq_res, rqstp);
6350         if (status)
6351                 goto out;
6352         status = decode_putfh(xdr);
6353         if (status)
6354                 goto out;
6355         status = decode_write(xdr, res);
6356         if (status)
6357                 goto out;
6358         if (res->fattr)
6359                 decode_getfattr(xdr, res->fattr, res->server,
6360                                 !RPC_IS_ASYNC(rqstp->rq_task));
6361         if (!status)
6362                 status = res->count;
6363 out:
6364         return status;
6365 }
6366
6367 /*
6368  * Decode COMMIT response
6369  */
6370 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6371                                struct nfs_writeres *res)
6372 {
6373         struct compound_hdr hdr;
6374         int status;
6375
6376         status = decode_compound_hdr(xdr, &hdr);
6377         if (status)
6378                 goto out;
6379         status = decode_sequence(xdr, &res->seq_res, rqstp);
6380         if (status)
6381                 goto out;
6382         status = decode_putfh(xdr);
6383         if (status)
6384                 goto out;
6385         status = decode_commit(xdr, res);
6386         if (status)
6387                 goto out;
6388         if (res->fattr)
6389                 decode_getfattr(xdr, res->fattr, res->server,
6390                                 !RPC_IS_ASYNC(rqstp->rq_task));
6391 out:
6392         return status;
6393 }
6394
6395 /*
6396  * Decode FSINFO response
6397  */
6398 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6399                                struct nfs4_fsinfo_res *res)
6400 {
6401         struct compound_hdr hdr;
6402         int status;
6403
6404         status = decode_compound_hdr(xdr, &hdr);
6405         if (!status)
6406                 status = decode_sequence(xdr, &res->seq_res, req);
6407         if (!status)
6408                 status = decode_putfh(xdr);
6409         if (!status)
6410                 status = decode_fsinfo(xdr, res->fsinfo);
6411         return status;
6412 }
6413
6414 /*
6415  * Decode PATHCONF response
6416  */
6417 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6418                                  struct nfs4_pathconf_res *res)
6419 {
6420         struct compound_hdr hdr;
6421         int status;
6422
6423         status = decode_compound_hdr(xdr, &hdr);
6424         if (!status)
6425                 status = decode_sequence(xdr, &res->seq_res, req);
6426         if (!status)
6427                 status = decode_putfh(xdr);
6428         if (!status)
6429                 status = decode_pathconf(xdr, res->pathconf);
6430         return status;
6431 }
6432
6433 /*
6434  * Decode STATFS response
6435  */
6436 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6437                                struct nfs4_statfs_res *res)
6438 {
6439         struct compound_hdr hdr;
6440         int status;
6441
6442         status = decode_compound_hdr(xdr, &hdr);
6443         if (!status)
6444                 status = decode_sequence(xdr, &res->seq_res, req);
6445         if (!status)
6446                 status = decode_putfh(xdr);
6447         if (!status)
6448                 status = decode_statfs(xdr, res->fsstat);
6449         return status;
6450 }
6451
6452 /*
6453  * Decode GETATTR_BITMAP response
6454  */
6455 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6456                                     struct xdr_stream *xdr,
6457                                     struct nfs4_server_caps_res *res)
6458 {
6459         struct compound_hdr hdr;
6460         int status;
6461
6462         status = decode_compound_hdr(xdr, &hdr);
6463         if (status)
6464                 goto out;
6465         status = decode_sequence(xdr, &res->seq_res, req);
6466         if (status)
6467                 goto out;
6468         status = decode_putfh(xdr);
6469         if (status)
6470                 goto out;
6471         status = decode_server_caps(xdr, res);
6472 out:
6473         return status;
6474 }
6475
6476 /*
6477  * Decode RENEW response
6478  */
6479 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6480                               void *__unused)
6481 {
6482         struct compound_hdr hdr;
6483         int status;
6484
6485         status = decode_compound_hdr(xdr, &hdr);
6486         if (!status)
6487                 status = decode_renew(xdr);
6488         return status;
6489 }
6490
6491 /*
6492  * Decode SETCLIENTID response
6493  */
6494 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6495                                     struct xdr_stream *xdr,
6496                                     struct nfs4_setclientid_res *res)
6497 {
6498         struct compound_hdr hdr;
6499         int status;
6500
6501         status = decode_compound_hdr(xdr, &hdr);
6502         if (!status)
6503                 status = decode_setclientid(xdr, res);
6504         return status;
6505 }
6506
6507 /*
6508  * Decode SETCLIENTID_CONFIRM response
6509  */
6510 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6511                                             struct xdr_stream *xdr,
6512                                             struct nfs_fsinfo *fsinfo)
6513 {
6514         struct compound_hdr hdr;
6515         int status;
6516
6517         status = decode_compound_hdr(xdr, &hdr);
6518         if (!status)
6519                 status = decode_setclientid_confirm(xdr);
6520         if (!status)
6521                 status = decode_putrootfh(xdr);
6522         if (!status)
6523                 status = decode_fsinfo(xdr, fsinfo);
6524         return status;
6525 }
6526
6527 /*
6528  * Decode DELEGRETURN response
6529  */
6530 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6531                                     struct xdr_stream *xdr,
6532                                     struct nfs4_delegreturnres *res)
6533 {
6534         struct compound_hdr hdr;
6535         int status;
6536
6537         status = decode_compound_hdr(xdr, &hdr);
6538         if (status)
6539                 goto out;
6540         status = decode_sequence(xdr, &res->seq_res, rqstp);
6541         if (status)
6542                 goto out;
6543         status = decode_putfh(xdr);
6544         if (status != 0)
6545                 goto out;
6546         status = decode_delegreturn(xdr);
6547         if (status != 0)
6548                 goto out;
6549         decode_getfattr(xdr, res->fattr, res->server,
6550                         !RPC_IS_ASYNC(rqstp->rq_task));
6551 out:
6552         return status;
6553 }
6554
6555 /*
6556  * Decode FS_LOCATIONS response
6557  */
6558 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6559                                      struct xdr_stream *xdr,
6560                                      struct nfs4_fs_locations_res *res)
6561 {
6562         struct compound_hdr hdr;
6563         int status;
6564
6565         status = decode_compound_hdr(xdr, &hdr);
6566         if (status)
6567                 goto out;
6568         status = decode_sequence(xdr, &res->seq_res, req);
6569         if (status)
6570                 goto out;
6571         status = decode_putfh(xdr);
6572         if (status)
6573                 goto out;
6574         status = decode_lookup(xdr);
6575         if (status)
6576                 goto out;
6577         xdr_enter_page(xdr, PAGE_SIZE);
6578         status = decode_getfattr(xdr, &res->fs_locations->fattr,
6579                                  res->fs_locations->server,
6580                                  !RPC_IS_ASYNC(req->rq_task));
6581 out:
6582         return status;
6583 }
6584
6585 /*
6586  * Decode SECINFO response
6587  */
6588 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6589                                 struct xdr_stream *xdr,
6590                                 struct nfs4_secinfo_res *res)
6591 {
6592         struct compound_hdr hdr;
6593         int status;
6594
6595         status = decode_compound_hdr(xdr, &hdr);
6596         if (status)
6597                 goto out;
6598         status = decode_sequence(xdr, &res->seq_res, rqstp);
6599         if (status)
6600                 goto out;
6601         status = decode_putfh(xdr);
6602         if (status)
6603                 goto out;
6604         status = decode_secinfo(xdr, res);
6605 out:
6606         return status;
6607 }
6608
6609 #if defined(CONFIG_NFS_V4_1)
6610 /*
6611  * Decode EXCHANGE_ID response
6612  */
6613 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
6614                                     struct xdr_stream *xdr,
6615                                     void *res)
6616 {
6617         struct compound_hdr hdr;
6618         int status;
6619
6620         status = decode_compound_hdr(xdr, &hdr);
6621         if (!status)
6622                 status = decode_exchange_id(xdr, res);
6623         return status;
6624 }
6625
6626 /*
6627  * Decode CREATE_SESSION response
6628  */
6629 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
6630                                        struct xdr_stream *xdr,
6631                                        struct nfs41_create_session_res *res)
6632 {
6633         struct compound_hdr hdr;
6634         int status;
6635
6636         status = decode_compound_hdr(xdr, &hdr);
6637         if (!status)
6638                 status = decode_create_session(xdr, res);
6639         return status;
6640 }
6641
6642 /*
6643  * Decode DESTROY_SESSION response
6644  */
6645 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
6646                                         struct xdr_stream *xdr,
6647                                         void *res)
6648 {
6649         struct compound_hdr hdr;
6650         int status;
6651
6652         status = decode_compound_hdr(xdr, &hdr);
6653         if (!status)
6654                 status = decode_destroy_session(xdr, res);
6655         return status;
6656 }
6657
6658 /*
6659  * Decode SEQUENCE response
6660  */
6661 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
6662                                  struct xdr_stream *xdr,
6663                                  struct nfs4_sequence_res *res)
6664 {
6665         struct compound_hdr hdr;
6666         int status;
6667
6668         status = decode_compound_hdr(xdr, &hdr);
6669         if (!status)
6670                 status = decode_sequence(xdr, res, rqstp);
6671         return status;
6672 }
6673
6674 /*
6675  * Decode GET_LEASE_TIME response
6676  */
6677 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
6678                                        struct xdr_stream *xdr,
6679                                        struct nfs4_get_lease_time_res *res)
6680 {
6681         struct compound_hdr hdr;
6682         int status;
6683
6684         status = decode_compound_hdr(xdr, &hdr);
6685         if (!status)
6686                 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
6687         if (!status)
6688                 status = decode_putrootfh(xdr);
6689         if (!status)
6690                 status = decode_fsinfo(xdr, res->lr_fsinfo);
6691         return status;
6692 }
6693
6694 /*
6695  * Decode RECLAIM_COMPLETE response
6696  */
6697 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
6698                                          struct xdr_stream *xdr,
6699                                          struct nfs41_reclaim_complete_res *res)
6700 {
6701         struct compound_hdr hdr;
6702         int status;
6703
6704         status = decode_compound_hdr(xdr, &hdr);
6705         if (!status)
6706                 status = decode_sequence(xdr, &res->seq_res, rqstp);
6707         if (!status)
6708                 status = decode_reclaim_complete(xdr, (void *)NULL);
6709         return status;
6710 }
6711
6712 /*
6713  * Decode GETDEVICELIST response
6714  */
6715 static int nfs4_xdr_dec_getdevicelist(struct rpc_rqst *rqstp,
6716                                       struct xdr_stream *xdr,
6717                                       struct nfs4_getdevicelist_res *res)
6718 {
6719         struct compound_hdr hdr;
6720         int status;
6721
6722         dprintk("encoding getdevicelist!\n");
6723
6724         status = decode_compound_hdr(xdr, &hdr);
6725         if (status != 0)
6726                 goto out;
6727         status = decode_sequence(xdr, &res->seq_res, rqstp);
6728         if (status != 0)
6729                 goto out;
6730         status = decode_putfh(xdr);
6731         if (status != 0)
6732                 goto out;
6733         status = decode_getdevicelist(xdr, res->devlist);
6734 out:
6735         return status;
6736 }
6737
6738 /*
6739  * Decode GETDEVINFO response
6740  */
6741 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
6742                                       struct xdr_stream *xdr,
6743                                       struct nfs4_getdeviceinfo_res *res)
6744 {
6745         struct compound_hdr hdr;
6746         int status;
6747
6748         status = decode_compound_hdr(xdr, &hdr);
6749         if (status != 0)
6750                 goto out;
6751         status = decode_sequence(xdr, &res->seq_res, rqstp);
6752         if (status != 0)
6753                 goto out;
6754         status = decode_getdeviceinfo(xdr, res->pdev);
6755 out:
6756         return status;
6757 }
6758
6759 /*
6760  * Decode LAYOUTGET response
6761  */
6762 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
6763                                   struct xdr_stream *xdr,
6764                                   struct nfs4_layoutget_res *res)
6765 {
6766         struct compound_hdr hdr;
6767         int status;
6768
6769         status = decode_compound_hdr(xdr, &hdr);
6770         if (status)
6771                 goto out;
6772         status = decode_sequence(xdr, &res->seq_res, rqstp);
6773         if (status)
6774                 goto out;
6775         status = decode_putfh(xdr);
6776         if (status)
6777                 goto out;
6778         status = decode_layoutget(xdr, rqstp, res);
6779 out:
6780         return status;
6781 }
6782
6783 /*
6784  * Decode LAYOUTRETURN response
6785  */
6786 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
6787                                      struct xdr_stream *xdr,
6788                                      struct nfs4_layoutreturn_res *res)
6789 {
6790         struct compound_hdr hdr;
6791         int status;
6792
6793         status = decode_compound_hdr(xdr, &hdr);
6794         if (status)
6795                 goto out;
6796         status = decode_sequence(xdr, &res->seq_res, rqstp);
6797         if (status)
6798                 goto out;
6799         status = decode_putfh(xdr);
6800         if (status)
6801                 goto out;
6802         status = decode_layoutreturn(xdr, res);
6803 out:
6804         return status;
6805 }
6806
6807 /*
6808  * Decode LAYOUTCOMMIT response
6809  */
6810 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
6811                                      struct xdr_stream *xdr,
6812                                      struct nfs4_layoutcommit_res *res)
6813 {
6814         struct compound_hdr hdr;
6815         int status;
6816
6817         status = decode_compound_hdr(xdr, &hdr);
6818         if (status)
6819                 goto out;
6820         status = decode_sequence(xdr, &res->seq_res, rqstp);
6821         if (status)
6822                 goto out;
6823         status = decode_putfh(xdr);
6824         if (status)
6825                 goto out;
6826         status = decode_layoutcommit(xdr, rqstp, res);
6827         if (status)
6828                 goto out;
6829         decode_getfattr(xdr, res->fattr, res->server,
6830                         !RPC_IS_ASYNC(rqstp->rq_task));
6831 out:
6832         return status;
6833 }
6834
6835 /*
6836  * Decode SECINFO_NO_NAME response
6837  */
6838 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
6839                                         struct xdr_stream *xdr,
6840                                         struct nfs4_secinfo_res *res)
6841 {
6842         struct compound_hdr hdr;
6843         int status;
6844
6845         status = decode_compound_hdr(xdr, &hdr);
6846         if (status)
6847                 goto out;
6848         status = decode_sequence(xdr, &res->seq_res, rqstp);
6849         if (status)
6850                 goto out;
6851         status = decode_putrootfh(xdr);
6852         if (status)
6853                 goto out;
6854         status = decode_secinfo(xdr, res);
6855 out:
6856         return status;
6857 }
6858
6859 /*
6860  * Decode TEST_STATEID response
6861  */
6862 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
6863                                      struct xdr_stream *xdr,
6864                                      struct nfs41_test_stateid_res *res)
6865 {
6866         struct compound_hdr hdr;
6867         int status;
6868
6869         status = decode_compound_hdr(xdr, &hdr);
6870         if (status)
6871                 goto out;
6872         status = decode_sequence(xdr, &res->seq_res, rqstp);
6873         if (status)
6874                 goto out;
6875         status = decode_test_stateid(xdr, res);
6876 out:
6877         return status;
6878 }
6879
6880 /*
6881  * Decode FREE_STATEID response
6882  */
6883 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
6884                                      struct xdr_stream *xdr,
6885                                      struct nfs41_free_stateid_res *res)
6886 {
6887         struct compound_hdr hdr;
6888         int status;
6889
6890         status = decode_compound_hdr(xdr, &hdr);
6891         if (status)
6892                 goto out;
6893         status = decode_sequence(xdr, &res->seq_res, rqstp);
6894         if (status)
6895                 goto out;
6896         status = decode_free_stateid(xdr, res);
6897 out:
6898         return status;
6899 }
6900 #endif /* CONFIG_NFS_V4_1 */
6901
6902 /**
6903  * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
6904  *                      the local page cache.
6905  * @xdr: XDR stream where entry resides
6906  * @entry: buffer to fill in with entry data
6907  * @plus: boolean indicating whether this should be a readdirplus entry
6908  *
6909  * Returns zero if successful, otherwise a negative errno value is
6910  * returned.
6911  *
6912  * This function is not invoked during READDIR reply decoding, but
6913  * rather whenever an application invokes the getdents(2) system call
6914  * on a directory already in our cache.
6915  */
6916 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
6917                        int plus)
6918 {
6919         uint32_t bitmap[3] = {0};
6920         uint32_t len;
6921         __be32 *p = xdr_inline_decode(xdr, 4);
6922         if (unlikely(!p))
6923                 goto out_overflow;
6924         if (*p == xdr_zero) {
6925                 p = xdr_inline_decode(xdr, 4);
6926                 if (unlikely(!p))
6927                         goto out_overflow;
6928                 if (*p == xdr_zero)
6929                         return -EAGAIN;
6930                 entry->eof = 1;
6931                 return -EBADCOOKIE;
6932         }
6933
6934         p = xdr_inline_decode(xdr, 12);
6935         if (unlikely(!p))
6936                 goto out_overflow;
6937         entry->prev_cookie = entry->cookie;
6938         p = xdr_decode_hyper(p, &entry->cookie);
6939         entry->len = be32_to_cpup(p);
6940
6941         p = xdr_inline_decode(xdr, entry->len);
6942         if (unlikely(!p))
6943                 goto out_overflow;
6944         entry->name = (const char *) p;
6945
6946         /*
6947          * In case the server doesn't return an inode number,
6948          * we fake one here.  (We don't use inode number 0,
6949          * since glibc seems to choke on it...)
6950          */
6951         entry->ino = 1;
6952         entry->fattr->valid = 0;
6953
6954         if (decode_attr_bitmap(xdr, bitmap) < 0)
6955                 goto out_overflow;
6956
6957         if (decode_attr_length(xdr, &len, &p) < 0)
6958                 goto out_overflow;
6959
6960         if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
6961                                         entry->server, 1) < 0)
6962                 goto out_overflow;
6963         if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
6964                 entry->ino = entry->fattr->mounted_on_fileid;
6965         else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
6966                 entry->ino = entry->fattr->fileid;
6967
6968         entry->d_type = DT_UNKNOWN;
6969         if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
6970                 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
6971
6972         return 0;
6973
6974 out_overflow:
6975         print_overflow_msg(__func__, xdr);
6976         return -EAGAIN;
6977 }
6978
6979 /*
6980  * We need to translate between nfs status return values and
6981  * the local errno values which may not be the same.
6982  */
6983 static struct {
6984         int stat;
6985         int errno;
6986 } nfs_errtbl[] = {
6987         { NFS4_OK,              0               },
6988         { NFS4ERR_PERM,         -EPERM          },
6989         { NFS4ERR_NOENT,        -ENOENT         },
6990         { NFS4ERR_IO,           -errno_NFSERR_IO},
6991         { NFS4ERR_NXIO,         -ENXIO          },
6992         { NFS4ERR_ACCESS,       -EACCES         },
6993         { NFS4ERR_EXIST,        -EEXIST         },
6994         { NFS4ERR_XDEV,         -EXDEV          },
6995         { NFS4ERR_NOTDIR,       -ENOTDIR        },
6996         { NFS4ERR_ISDIR,        -EISDIR         },
6997         { NFS4ERR_INVAL,        -EINVAL         },
6998         { NFS4ERR_FBIG,         -EFBIG          },
6999         { NFS4ERR_NOSPC,        -ENOSPC         },
7000         { NFS4ERR_ROFS,         -EROFS          },
7001         { NFS4ERR_MLINK,        -EMLINK         },
7002         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
7003         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
7004         { NFS4ERR_DQUOT,        -EDQUOT         },
7005         { NFS4ERR_STALE,        -ESTALE         },
7006         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
7007         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
7008         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
7009         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
7010         { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
7011         { NFS4ERR_BADTYPE,      -EBADTYPE       },
7012         { NFS4ERR_LOCKED,       -EAGAIN         },
7013         { NFS4ERR_SYMLINK,      -ELOOP          },
7014         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
7015         { NFS4ERR_DEADLOCK,     -EDEADLK        },
7016         { -1,                   -EIO            }
7017 };
7018
7019 /*
7020  * Convert an NFS error code to a local one.
7021  * This one is used jointly by NFSv2 and NFSv3.
7022  */
7023 static int
7024 nfs4_stat_to_errno(int stat)
7025 {
7026         int i;
7027         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7028                 if (nfs_errtbl[i].stat == stat)
7029                         return nfs_errtbl[i].errno;
7030         }
7031         if (stat <= 10000 || stat > 10100) {
7032                 /* The server is looney tunes. */
7033                 return -EREMOTEIO;
7034         }
7035         /* If we cannot translate the error, the recovery routines should
7036          * handle it.
7037          * Note: remaining NFSv4 error codes have values > 10000, so should
7038          * not conflict with native Linux error codes.
7039          */
7040         return -stat;
7041 }
7042
7043 #define PROC(proc, argtype, restype)                            \
7044 [NFSPROC4_CLNT_##proc] = {                                      \
7045         .p_proc   = NFSPROC4_COMPOUND,                          \
7046         .p_encode = (kxdreproc_t)nfs4_xdr_##argtype,            \
7047         .p_decode = (kxdrdproc_t)nfs4_xdr_##restype,            \
7048         .p_arglen = NFS4_##argtype##_sz,                        \
7049         .p_replen = NFS4_##restype##_sz,                        \
7050         .p_statidx = NFSPROC4_CLNT_##proc,                      \
7051         .p_name   = #proc,                                      \
7052 }
7053
7054 struct rpc_procinfo     nfs4_procedures[] = {
7055         PROC(READ,              enc_read,               dec_read),
7056         PROC(WRITE,             enc_write,              dec_write),
7057         PROC(COMMIT,            enc_commit,             dec_commit),
7058         PROC(OPEN,              enc_open,               dec_open),
7059         PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
7060         PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
7061         PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
7062         PROC(CLOSE,             enc_close,              dec_close),
7063         PROC(SETATTR,           enc_setattr,            dec_setattr),
7064         PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
7065         PROC(RENEW,             enc_renew,              dec_renew),
7066         PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
7067         PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7068         PROC(LOCK,              enc_lock,               dec_lock),
7069         PROC(LOCKT,             enc_lockt,              dec_lockt),
7070         PROC(LOCKU,             enc_locku,              dec_locku),
7071         PROC(ACCESS,            enc_access,             dec_access),
7072         PROC(GETATTR,           enc_getattr,            dec_getattr),
7073         PROC(LOOKUP,            enc_lookup,             dec_lookup),
7074         PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
7075         PROC(REMOVE,            enc_remove,             dec_remove),
7076         PROC(RENAME,            enc_rename,             dec_rename),
7077         PROC(LINK,              enc_link,               dec_link),
7078         PROC(SYMLINK,           enc_symlink,            dec_symlink),
7079         PROC(CREATE,            enc_create,             dec_create),
7080         PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
7081         PROC(STATFS,            enc_statfs,             dec_statfs),
7082         PROC(READLINK,          enc_readlink,           dec_readlink),
7083         PROC(READDIR,           enc_readdir,            dec_readdir),
7084         PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
7085         PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
7086         PROC(GETACL,            enc_getacl,             dec_getacl),
7087         PROC(SETACL,            enc_setacl,             dec_setacl),
7088         PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
7089         PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
7090         PROC(SECINFO,           enc_secinfo,            dec_secinfo),
7091 #if defined(CONFIG_NFS_V4_1)
7092         PROC(EXCHANGE_ID,       enc_exchange_id,        dec_exchange_id),
7093         PROC(CREATE_SESSION,    enc_create_session,     dec_create_session),
7094         PROC(DESTROY_SESSION,   enc_destroy_session,    dec_destroy_session),
7095         PROC(SEQUENCE,          enc_sequence,           dec_sequence),
7096         PROC(GET_LEASE_TIME,    enc_get_lease_time,     dec_get_lease_time),
7097         PROC(RECLAIM_COMPLETE,  enc_reclaim_complete,   dec_reclaim_complete),
7098         PROC(GETDEVICEINFO,     enc_getdeviceinfo,      dec_getdeviceinfo),
7099         PROC(LAYOUTGET,         enc_layoutget,          dec_layoutget),
7100         PROC(LAYOUTCOMMIT,      enc_layoutcommit,       dec_layoutcommit),
7101         PROC(LAYOUTRETURN,      enc_layoutreturn,       dec_layoutreturn),
7102         PROC(SECINFO_NO_NAME,   enc_secinfo_no_name,    dec_secinfo_no_name),
7103         PROC(TEST_STATEID,      enc_test_stateid,       dec_test_stateid),
7104         PROC(FREE_STATEID,      enc_free_stateid,       dec_free_stateid),
7105         PROC(GETDEVICELIST,     enc_getdevicelist,      dec_getdevicelist),
7106 #endif /* CONFIG_NFS_V4_1 */
7107 };
7108
7109 struct rpc_version              nfs_version4 = {
7110         .number                 = 4,
7111         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
7112         .procs                  = nfs4_procedures
7113 };
7114
7115 /*
7116  * Local variables:
7117  *  c-basic-offset: 8
7118  * End:
7119  */