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->dir_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 + 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
2526         encode_nops(&hdr);
2527 }
2528
2529 /*
2530  * Encode a WRITE request
2531  */
2532 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2533                                struct nfs_writeargs *args)
2534 {
2535         struct compound_hdr hdr = {
2536                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2537         };
2538
2539         encode_compound_hdr(xdr, req, &hdr);
2540         encode_sequence(xdr, &args->seq_args, &hdr);
2541         encode_putfh(xdr, args->fh, &hdr);
2542         encode_write(xdr, args, &hdr);
2543         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2544         if (args->bitmask)
2545                 encode_getfattr(xdr, args->bitmask, &hdr);
2546         encode_nops(&hdr);
2547 }
2548
2549 /*
2550  *  a COMMIT request
2551  */
2552 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2553                                 struct nfs_writeargs *args)
2554 {
2555         struct compound_hdr hdr = {
2556                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2557         };
2558
2559         encode_compound_hdr(xdr, req, &hdr);
2560         encode_sequence(xdr, &args->seq_args, &hdr);
2561         encode_putfh(xdr, args->fh, &hdr);
2562         encode_commit(xdr, args, &hdr);
2563         if (args->bitmask)
2564                 encode_getfattr(xdr, args->bitmask, &hdr);
2565         encode_nops(&hdr);
2566 }
2567
2568 /*
2569  * FSINFO request
2570  */
2571 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2572                                 struct nfs4_fsinfo_arg *args)
2573 {
2574         struct compound_hdr hdr = {
2575                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2576         };
2577
2578         encode_compound_hdr(xdr, req, &hdr);
2579         encode_sequence(xdr, &args->seq_args, &hdr);
2580         encode_putfh(xdr, args->fh, &hdr);
2581         encode_fsinfo(xdr, args->bitmask, &hdr);
2582         encode_nops(&hdr);
2583 }
2584
2585 /*
2586  * a PATHCONF request
2587  */
2588 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2589                                   const struct nfs4_pathconf_arg *args)
2590 {
2591         struct compound_hdr hdr = {
2592                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2593         };
2594
2595         encode_compound_hdr(xdr, req, &hdr);
2596         encode_sequence(xdr, &args->seq_args, &hdr);
2597         encode_putfh(xdr, args->fh, &hdr);
2598         encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2599                            &hdr);
2600         encode_nops(&hdr);
2601 }
2602
2603 /*
2604  * a STATFS request
2605  */
2606 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2607                                 const struct nfs4_statfs_arg *args)
2608 {
2609         struct compound_hdr hdr = {
2610                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2611         };
2612
2613         encode_compound_hdr(xdr, req, &hdr);
2614         encode_sequence(xdr, &args->seq_args, &hdr);
2615         encode_putfh(xdr, args->fh, &hdr);
2616         encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2617                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2618         encode_nops(&hdr);
2619 }
2620
2621 /*
2622  * GETATTR_BITMAP request
2623  */
2624 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2625                                      struct xdr_stream *xdr,
2626                                      struct nfs4_server_caps_arg *args)
2627 {
2628         struct compound_hdr hdr = {
2629                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2630         };
2631
2632         encode_compound_hdr(xdr, req, &hdr);
2633         encode_sequence(xdr, &args->seq_args, &hdr);
2634         encode_putfh(xdr, args->fhandle, &hdr);
2635         encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2636                            FATTR4_WORD0_LINK_SUPPORT|
2637                            FATTR4_WORD0_SYMLINK_SUPPORT|
2638                            FATTR4_WORD0_ACLSUPPORT, &hdr);
2639         encode_nops(&hdr);
2640 }
2641
2642 /*
2643  * a RENEW request
2644  */
2645 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2646                                struct nfs_client *clp)
2647 {
2648         struct compound_hdr hdr = {
2649                 .nops   = 0,
2650         };
2651
2652         encode_compound_hdr(xdr, req, &hdr);
2653         encode_renew(xdr, clp, &hdr);
2654         encode_nops(&hdr);
2655 }
2656
2657 /*
2658  * a SETCLIENTID request
2659  */
2660 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2661                                      struct xdr_stream *xdr,
2662                                      struct nfs4_setclientid *sc)
2663 {
2664         struct compound_hdr hdr = {
2665                 .nops   = 0,
2666         };
2667
2668         encode_compound_hdr(xdr, req, &hdr);
2669         encode_setclientid(xdr, sc, &hdr);
2670         encode_nops(&hdr);
2671 }
2672
2673 /*
2674  * a SETCLIENTID_CONFIRM request
2675  */
2676 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2677                                              struct xdr_stream *xdr,
2678                                              struct nfs4_setclientid_res *arg)
2679 {
2680         struct compound_hdr hdr = {
2681                 .nops   = 0,
2682         };
2683         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2684
2685         encode_compound_hdr(xdr, req, &hdr);
2686         encode_setclientid_confirm(xdr, arg, &hdr);
2687         encode_putrootfh(xdr, &hdr);
2688         encode_fsinfo(xdr, lease_bitmap, &hdr);
2689         encode_nops(&hdr);
2690 }
2691
2692 /*
2693  * DELEGRETURN request
2694  */
2695 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2696                                      struct xdr_stream *xdr,
2697                                      const struct nfs4_delegreturnargs *args)
2698 {
2699         struct compound_hdr hdr = {
2700                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2701         };
2702
2703         encode_compound_hdr(xdr, req, &hdr);
2704         encode_sequence(xdr, &args->seq_args, &hdr);
2705         encode_putfh(xdr, args->fhandle, &hdr);
2706         encode_delegreturn(xdr, args->stateid, &hdr);
2707         encode_getfattr(xdr, args->bitmask, &hdr);
2708         encode_nops(&hdr);
2709 }
2710
2711 /*
2712  * Encode FS_LOCATIONS request
2713  */
2714 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2715                                       struct xdr_stream *xdr,
2716                                       struct nfs4_fs_locations_arg *args)
2717 {
2718         struct compound_hdr hdr = {
2719                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2720         };
2721         uint32_t replen;
2722
2723         encode_compound_hdr(xdr, req, &hdr);
2724         encode_sequence(xdr, &args->seq_args, &hdr);
2725         encode_putfh(xdr, args->dir_fh, &hdr);
2726         encode_lookup(xdr, args->name, &hdr);
2727         replen = hdr.replen;    /* get the attribute into args->page */
2728         encode_fs_locations(xdr, args->bitmask, &hdr);
2729
2730         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2731                         0, PAGE_SIZE);
2732         encode_nops(&hdr);
2733 }
2734
2735 /*
2736  * Encode SECINFO request
2737  */
2738 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2739                                 struct xdr_stream *xdr,
2740                                 struct nfs4_secinfo_arg *args)
2741 {
2742         struct compound_hdr hdr = {
2743                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2744         };
2745
2746         encode_compound_hdr(xdr, req, &hdr);
2747         encode_sequence(xdr, &args->seq_args, &hdr);
2748         encode_putfh(xdr, args->dir_fh, &hdr);
2749         encode_secinfo(xdr, args->name, &hdr);
2750         encode_nops(&hdr);
2751 }
2752
2753 #if defined(CONFIG_NFS_V4_1)
2754 /*
2755  * EXCHANGE_ID request
2756  */
2757 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2758                                      struct xdr_stream *xdr,
2759                                      struct nfs41_exchange_id_args *args)
2760 {
2761         struct compound_hdr hdr = {
2762                 .minorversion = args->client->cl_mvops->minor_version,
2763         };
2764
2765         encode_compound_hdr(xdr, req, &hdr);
2766         encode_exchange_id(xdr, args, &hdr);
2767         encode_nops(&hdr);
2768 }
2769
2770 /*
2771  * a CREATE_SESSION request
2772  */
2773 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2774                                         struct xdr_stream *xdr,
2775                                         struct nfs41_create_session_args *args)
2776 {
2777         struct compound_hdr hdr = {
2778                 .minorversion = args->client->cl_mvops->minor_version,
2779         };
2780
2781         encode_compound_hdr(xdr, req, &hdr);
2782         encode_create_session(xdr, args, &hdr);
2783         encode_nops(&hdr);
2784 }
2785
2786 /*
2787  * a DESTROY_SESSION request
2788  */
2789 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2790                                          struct xdr_stream *xdr,
2791                                          struct nfs4_session *session)
2792 {
2793         struct compound_hdr hdr = {
2794                 .minorversion = session->clp->cl_mvops->minor_version,
2795         };
2796
2797         encode_compound_hdr(xdr, req, &hdr);
2798         encode_destroy_session(xdr, session, &hdr);
2799         encode_nops(&hdr);
2800 }
2801
2802 /*
2803  * a SEQUENCE request
2804  */
2805 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2806                                   struct nfs4_sequence_args *args)
2807 {
2808         struct compound_hdr hdr = {
2809                 .minorversion = nfs4_xdr_minorversion(args),
2810         };
2811
2812         encode_compound_hdr(xdr, req, &hdr);
2813         encode_sequence(xdr, args, &hdr);
2814         encode_nops(&hdr);
2815 }
2816
2817 /*
2818  * a GET_LEASE_TIME request
2819  */
2820 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2821                                         struct xdr_stream *xdr,
2822                                         struct nfs4_get_lease_time_args *args)
2823 {
2824         struct compound_hdr hdr = {
2825                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2826         };
2827         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2828
2829         encode_compound_hdr(xdr, req, &hdr);
2830         encode_sequence(xdr, &args->la_seq_args, &hdr);
2831         encode_putrootfh(xdr, &hdr);
2832         encode_fsinfo(xdr, lease_bitmap, &hdr);
2833         encode_nops(&hdr);
2834 }
2835
2836 /*
2837  * a RECLAIM_COMPLETE request
2838  */
2839 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2840                                           struct xdr_stream *xdr,
2841                                 struct nfs41_reclaim_complete_args *args)
2842 {
2843         struct compound_hdr hdr = {
2844                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2845         };
2846
2847         encode_compound_hdr(xdr, req, &hdr);
2848         encode_sequence(xdr, &args->seq_args, &hdr);
2849         encode_reclaim_complete(xdr, args, &hdr);
2850         encode_nops(&hdr);
2851 }
2852
2853 /*
2854  * Encode GETDEVICELIST request
2855  */
2856 static void nfs4_xdr_enc_getdevicelist(struct rpc_rqst *req,
2857                                        struct xdr_stream *xdr,
2858                                        struct nfs4_getdevicelist_args *args)
2859 {
2860         struct compound_hdr hdr = {
2861                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2862         };
2863
2864         encode_compound_hdr(xdr, req, &hdr);
2865         encode_sequence(xdr, &args->seq_args, &hdr);
2866         encode_putfh(xdr, args->fh, &hdr);
2867         encode_getdevicelist(xdr, args, &hdr);
2868         encode_nops(&hdr);
2869 }
2870
2871 /*
2872  * Encode GETDEVICEINFO request
2873  */
2874 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2875                                        struct xdr_stream *xdr,
2876                                        struct nfs4_getdeviceinfo_args *args)
2877 {
2878         struct compound_hdr hdr = {
2879                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2880         };
2881
2882         encode_compound_hdr(xdr, req, &hdr);
2883         encode_sequence(xdr, &args->seq_args, &hdr);
2884         encode_getdeviceinfo(xdr, args, &hdr);
2885
2886         /* set up reply kvec. Subtract notification bitmap max size (2)
2887          * so that notification bitmap is put in xdr_buf tail */
2888         xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2889                          args->pdev->pages, args->pdev->pgbase,
2890                          args->pdev->pglen);
2891
2892         encode_nops(&hdr);
2893 }
2894
2895 /*
2896  *  Encode LAYOUTGET request
2897  */
2898 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2899                                    struct xdr_stream *xdr,
2900                                    struct nfs4_layoutget_args *args)
2901 {
2902         struct compound_hdr hdr = {
2903                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2904         };
2905
2906         encode_compound_hdr(xdr, req, &hdr);
2907         encode_sequence(xdr, &args->seq_args, &hdr);
2908         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2909         encode_layoutget(xdr, args, &hdr);
2910
2911         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2912             args->layout.pages, 0, args->layout.pglen);
2913
2914         encode_nops(&hdr);
2915 }
2916
2917 /*
2918  *  Encode LAYOUTCOMMIT request
2919  */
2920 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2921                                       struct xdr_stream *xdr,
2922                                       struct nfs4_layoutcommit_args *args)
2923 {
2924         struct nfs4_layoutcommit_data *data =
2925                 container_of(args, struct nfs4_layoutcommit_data, args);
2926         struct compound_hdr hdr = {
2927                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2928         };
2929
2930         encode_compound_hdr(xdr, req, &hdr);
2931         encode_sequence(xdr, &args->seq_args, &hdr);
2932         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2933         encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2934         encode_getfattr(xdr, args->bitmask, &hdr);
2935         encode_nops(&hdr);
2936 }
2937
2938 /*
2939  * Encode LAYOUTRETURN request
2940  */
2941 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2942                                       struct xdr_stream *xdr,
2943                                       struct nfs4_layoutreturn_args *args)
2944 {
2945         struct compound_hdr hdr = {
2946                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2947         };
2948
2949         encode_compound_hdr(xdr, req, &hdr);
2950         encode_sequence(xdr, &args->seq_args, &hdr);
2951         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2952         encode_layoutreturn(xdr, args, &hdr);
2953         encode_nops(&hdr);
2954 }
2955
2956 /*
2957  * Encode SECINFO_NO_NAME request
2958  */
2959 static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
2960                                         struct xdr_stream *xdr,
2961                                         struct nfs41_secinfo_no_name_args *args)
2962 {
2963         struct compound_hdr hdr = {
2964                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2965         };
2966
2967         encode_compound_hdr(xdr, req, &hdr);
2968         encode_sequence(xdr, &args->seq_args, &hdr);
2969         encode_putrootfh(xdr, &hdr);
2970         encode_secinfo_no_name(xdr, args, &hdr);
2971         encode_nops(&hdr);
2972         return 0;
2973 }
2974
2975 /*
2976  *  Encode TEST_STATEID request
2977  */
2978 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
2979                                       struct xdr_stream *xdr,
2980                                       struct nfs41_test_stateid_args *args)
2981 {
2982         struct compound_hdr hdr = {
2983                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2984         };
2985
2986         encode_compound_hdr(xdr, req, &hdr);
2987         encode_sequence(xdr, &args->seq_args, &hdr);
2988         encode_test_stateid(xdr, args, &hdr);
2989         encode_nops(&hdr);
2990 }
2991
2992 /*
2993  *  Encode FREE_STATEID request
2994  */
2995 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
2996                                      struct xdr_stream *xdr,
2997                                      struct nfs41_free_stateid_args *args)
2998 {
2999         struct compound_hdr hdr = {
3000                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3001         };
3002
3003         encode_compound_hdr(xdr, req, &hdr);
3004         encode_sequence(xdr, &args->seq_args, &hdr);
3005         encode_free_stateid(xdr, args, &hdr);
3006         encode_nops(&hdr);
3007 }
3008 #endif /* CONFIG_NFS_V4_1 */
3009
3010 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
3011 {
3012         dprintk("nfs: %s: prematurely hit end of receive buffer. "
3013                 "Remaining buffer length is %tu words.\n",
3014                 func, xdr->end - xdr->p);
3015 }
3016
3017 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3018 {
3019         __be32 *p;
3020
3021         p = xdr_inline_decode(xdr, 4);
3022         if (unlikely(!p))
3023                 goto out_overflow;
3024         *len = be32_to_cpup(p);
3025         p = xdr_inline_decode(xdr, *len);
3026         if (unlikely(!p))
3027                 goto out_overflow;
3028         *string = (char *)p;
3029         return 0;
3030 out_overflow:
3031         print_overflow_msg(__func__, xdr);
3032         return -EIO;
3033 }
3034
3035 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3036 {
3037         __be32 *p;
3038
3039         p = xdr_inline_decode(xdr, 8);
3040         if (unlikely(!p))
3041                 goto out_overflow;
3042         hdr->status = be32_to_cpup(p++);
3043         hdr->taglen = be32_to_cpup(p);
3044
3045         p = xdr_inline_decode(xdr, hdr->taglen + 4);
3046         if (unlikely(!p))
3047                 goto out_overflow;
3048         hdr->tag = (char *)p;
3049         p += XDR_QUADLEN(hdr->taglen);
3050         hdr->nops = be32_to_cpup(p);
3051         if (unlikely(hdr->nops < 1))
3052                 return nfs4_stat_to_errno(hdr->status);
3053         return 0;
3054 out_overflow:
3055         print_overflow_msg(__func__, xdr);
3056         return -EIO;
3057 }
3058
3059 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3060 {
3061         __be32 *p;
3062         uint32_t opnum;
3063         int32_t nfserr;
3064
3065         p = xdr_inline_decode(xdr, 8);
3066         if (unlikely(!p))
3067                 goto out_overflow;
3068         opnum = be32_to_cpup(p++);
3069         if (opnum != expected) {
3070                 dprintk("nfs: Server returned operation"
3071                         " %d but we issued a request for %d\n",
3072                                 opnum, expected);
3073                 return -EIO;
3074         }
3075         nfserr = be32_to_cpup(p);
3076         if (nfserr != NFS_OK)
3077                 return nfs4_stat_to_errno(nfserr);
3078         return 0;
3079 out_overflow:
3080         print_overflow_msg(__func__, xdr);
3081         return -EIO;
3082 }
3083
3084 /* Dummy routine */
3085 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
3086 {
3087         __be32 *p;
3088         unsigned int strlen;
3089         char *str;
3090
3091         p = xdr_inline_decode(xdr, 12);
3092         if (likely(p))
3093                 return decode_opaque_inline(xdr, &strlen, &str);
3094         print_overflow_msg(__func__, xdr);
3095         return -EIO;
3096 }
3097
3098 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3099 {
3100         uint32_t bmlen;
3101         __be32 *p;
3102
3103         p = xdr_inline_decode(xdr, 4);
3104         if (unlikely(!p))
3105                 goto out_overflow;
3106         bmlen = be32_to_cpup(p);
3107
3108         bitmap[0] = bitmap[1] = bitmap[2] = 0;
3109         p = xdr_inline_decode(xdr, (bmlen << 2));
3110         if (unlikely(!p))
3111                 goto out_overflow;
3112         if (bmlen > 0) {
3113                 bitmap[0] = be32_to_cpup(p++);
3114                 if (bmlen > 1) {
3115                         bitmap[1] = be32_to_cpup(p++);
3116                         if (bmlen > 2)
3117                                 bitmap[2] = be32_to_cpup(p);
3118                 }
3119         }
3120         return 0;
3121 out_overflow:
3122         print_overflow_msg(__func__, xdr);
3123         return -EIO;
3124 }
3125
3126 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
3127 {
3128         __be32 *p;
3129
3130         p = xdr_inline_decode(xdr, 4);
3131         if (unlikely(!p))
3132                 goto out_overflow;
3133         *attrlen = be32_to_cpup(p);
3134         *savep = xdr->p;
3135         return 0;
3136 out_overflow:
3137         print_overflow_msg(__func__, xdr);
3138         return -EIO;
3139 }
3140
3141 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3142 {
3143         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3144                 int ret;
3145                 ret = decode_attr_bitmap(xdr, bitmask);
3146                 if (unlikely(ret < 0))
3147                         return ret;
3148                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3149         } else
3150                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3151         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3152                 bitmask[0], bitmask[1], bitmask[2]);
3153         return 0;
3154 }
3155
3156 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3157 {
3158         __be32 *p;
3159         int ret = 0;
3160
3161         *type = 0;
3162         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3163                 return -EIO;
3164         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3165                 p = xdr_inline_decode(xdr, 4);
3166                 if (unlikely(!p))
3167                         goto out_overflow;
3168                 *type = be32_to_cpup(p);
3169                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3170                         dprintk("%s: bad type %d\n", __func__, *type);
3171                         return -EIO;
3172                 }
3173                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3174                 ret = NFS_ATTR_FATTR_TYPE;
3175         }
3176         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3177         return ret;
3178 out_overflow:
3179         print_overflow_msg(__func__, xdr);
3180         return -EIO;
3181 }
3182
3183 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3184 {
3185         __be32 *p;
3186         int ret = 0;
3187
3188         *change = 0;
3189         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3190                 return -EIO;
3191         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3192                 p = xdr_inline_decode(xdr, 8);
3193                 if (unlikely(!p))
3194                         goto out_overflow;
3195                 xdr_decode_hyper(p, change);
3196                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3197                 ret = NFS_ATTR_FATTR_CHANGE;
3198         }
3199         dprintk("%s: change attribute=%Lu\n", __func__,
3200                         (unsigned long long)*change);
3201         return ret;
3202 out_overflow:
3203         print_overflow_msg(__func__, xdr);
3204         return -EIO;
3205 }
3206
3207 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3208 {
3209         __be32 *p;
3210         int ret = 0;
3211
3212         *size = 0;
3213         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3214                 return -EIO;
3215         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3216                 p = xdr_inline_decode(xdr, 8);
3217                 if (unlikely(!p))
3218                         goto out_overflow;
3219                 xdr_decode_hyper(p, size);
3220                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3221                 ret = NFS_ATTR_FATTR_SIZE;
3222         }
3223         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3224         return ret;
3225 out_overflow:
3226         print_overflow_msg(__func__, xdr);
3227         return -EIO;
3228 }
3229
3230 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3231 {
3232         __be32 *p;
3233
3234         *res = 0;
3235         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3236                 return -EIO;
3237         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3238                 p = xdr_inline_decode(xdr, 4);
3239                 if (unlikely(!p))
3240                         goto out_overflow;
3241                 *res = be32_to_cpup(p);
3242                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3243         }
3244         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3245         return 0;
3246 out_overflow:
3247         print_overflow_msg(__func__, xdr);
3248         return -EIO;
3249 }
3250
3251 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3252 {
3253         __be32 *p;
3254
3255         *res = 0;
3256         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3257                 return -EIO;
3258         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3259                 p = xdr_inline_decode(xdr, 4);
3260                 if (unlikely(!p))
3261                         goto out_overflow;
3262                 *res = be32_to_cpup(p);
3263                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3264         }
3265         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3266         return 0;
3267 out_overflow:
3268         print_overflow_msg(__func__, xdr);
3269         return -EIO;
3270 }
3271
3272 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3273 {
3274         __be32 *p;
3275         int ret = 0;
3276
3277         fsid->major = 0;
3278         fsid->minor = 0;
3279         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3280                 return -EIO;
3281         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3282                 p = xdr_inline_decode(xdr, 16);
3283                 if (unlikely(!p))
3284                         goto out_overflow;
3285                 p = xdr_decode_hyper(p, &fsid->major);
3286                 xdr_decode_hyper(p, &fsid->minor);
3287                 bitmap[0] &= ~FATTR4_WORD0_FSID;
3288                 ret = NFS_ATTR_FATTR_FSID;
3289         }
3290         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3291                         (unsigned long long)fsid->major,
3292                         (unsigned long long)fsid->minor);
3293         return ret;
3294 out_overflow:
3295         print_overflow_msg(__func__, xdr);
3296         return -EIO;
3297 }
3298
3299 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3300 {
3301         __be32 *p;
3302
3303         *res = 60;
3304         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3305                 return -EIO;
3306         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3307                 p = xdr_inline_decode(xdr, 4);
3308                 if (unlikely(!p))
3309                         goto out_overflow;
3310                 *res = be32_to_cpup(p);
3311                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3312         }
3313         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3314         return 0;
3315 out_overflow:
3316         print_overflow_msg(__func__, xdr);
3317         return -EIO;
3318 }
3319
3320 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3321 {
3322         __be32 *p;
3323
3324         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3325                 return -EIO;
3326         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3327                 p = xdr_inline_decode(xdr, 4);
3328                 if (unlikely(!p))
3329                         goto out_overflow;
3330                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3331                 *res = -be32_to_cpup(p);
3332         }
3333         return 0;
3334 out_overflow:
3335         print_overflow_msg(__func__, xdr);
3336         return -EIO;
3337 }
3338
3339 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3340 {
3341         __be32 *p;
3342         int len;
3343
3344         if (fh != NULL)
3345                 memset(fh, 0, sizeof(*fh));
3346
3347         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3348                 return -EIO;
3349         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3350                 p = xdr_inline_decode(xdr, 4);
3351                 if (unlikely(!p))
3352                         goto out_overflow;
3353                 len = be32_to_cpup(p);
3354                 if (len > NFS4_FHSIZE)
3355                         return -EIO;
3356                 p = xdr_inline_decode(xdr, len);
3357                 if (unlikely(!p))
3358                         goto out_overflow;
3359                 if (fh != NULL) {
3360                         memcpy(fh->data, p, len);
3361                         fh->size = len;
3362                 }
3363                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3364         }
3365         return 0;
3366 out_overflow:
3367         print_overflow_msg(__func__, xdr);
3368         return -EIO;
3369 }
3370
3371 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3372 {
3373         __be32 *p;
3374
3375         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
3376         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3377                 return -EIO;
3378         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3379                 p = xdr_inline_decode(xdr, 4);
3380                 if (unlikely(!p))
3381                         goto out_overflow;
3382                 *res = be32_to_cpup(p);
3383                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3384         }
3385         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3386         return 0;
3387 out_overflow:
3388         print_overflow_msg(__func__, xdr);
3389         return -EIO;
3390 }
3391
3392 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3393 {
3394         __be32 *p;
3395         int ret = 0;
3396
3397         *fileid = 0;
3398         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3399                 return -EIO;
3400         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3401                 p = xdr_inline_decode(xdr, 8);
3402                 if (unlikely(!p))
3403                         goto out_overflow;
3404                 xdr_decode_hyper(p, fileid);
3405                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3406                 ret = NFS_ATTR_FATTR_FILEID;
3407         }
3408         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3409         return ret;
3410 out_overflow:
3411         print_overflow_msg(__func__, xdr);
3412         return -EIO;
3413 }
3414
3415 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3416 {
3417         __be32 *p;
3418         int ret = 0;
3419
3420         *fileid = 0;
3421         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3422                 return -EIO;
3423         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3424                 p = xdr_inline_decode(xdr, 8);
3425                 if (unlikely(!p))
3426                         goto out_overflow;
3427                 xdr_decode_hyper(p, fileid);
3428                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3429                 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3430         }
3431         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3432         return ret;
3433 out_overflow:
3434         print_overflow_msg(__func__, xdr);
3435         return -EIO;
3436 }
3437
3438 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3439 {
3440         __be32 *p;
3441         int status = 0;
3442
3443         *res = 0;
3444         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3445                 return -EIO;
3446         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3447                 p = xdr_inline_decode(xdr, 8);
3448                 if (unlikely(!p))
3449                         goto out_overflow;
3450                 xdr_decode_hyper(p, res);
3451                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3452         }
3453         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3454         return status;
3455 out_overflow:
3456         print_overflow_msg(__func__, xdr);
3457         return -EIO;
3458 }
3459
3460 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3461 {
3462         __be32 *p;
3463         int status = 0;
3464
3465         *res = 0;
3466         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3467                 return -EIO;
3468         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3469                 p = xdr_inline_decode(xdr, 8);
3470                 if (unlikely(!p))
3471                         goto out_overflow;
3472                 xdr_decode_hyper(p, res);
3473                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3474         }
3475         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3476         return status;
3477 out_overflow:
3478         print_overflow_msg(__func__, xdr);
3479         return -EIO;
3480 }
3481
3482 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3483 {
3484         __be32 *p;
3485         int status = 0;
3486
3487         *res = 0;
3488         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3489                 return -EIO;
3490         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3491                 p = xdr_inline_decode(xdr, 8);
3492                 if (unlikely(!p))
3493                         goto out_overflow;
3494                 xdr_decode_hyper(p, res);
3495                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3496         }
3497         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3498         return status;
3499 out_overflow:
3500         print_overflow_msg(__func__, xdr);
3501         return -EIO;
3502 }
3503
3504 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3505 {
3506         u32 n;
3507         __be32 *p;
3508         int status = 0;
3509
3510         p = xdr_inline_decode(xdr, 4);
3511         if (unlikely(!p))
3512                 goto out_overflow;
3513         n = be32_to_cpup(p);
3514         if (n == 0)
3515                 goto root_path;
3516         dprintk("path ");
3517         path->ncomponents = 0;
3518         while (path->ncomponents < n) {
3519                 struct nfs4_string *component = &path->components[path->ncomponents];
3520                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3521                 if (unlikely(status != 0))
3522                         goto out_eio;
3523                 if (path->ncomponents != n)
3524                         dprintk("/");
3525                 dprintk("%s", component->data);
3526                 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
3527                         path->ncomponents++;
3528                 else {
3529                         dprintk("cannot parse %d components in path\n", n);
3530                         goto out_eio;
3531                 }
3532         }
3533 out:
3534         dprintk("\n");
3535         return status;
3536 root_path:
3537 /* a root pathname is sent as a zero component4 */
3538         path->ncomponents = 1;
3539         path->components[0].len=0;
3540         path->components[0].data=NULL;
3541         dprintk("path /\n");
3542         goto out;
3543 out_eio:
3544         dprintk(" status %d", status);
3545         status = -EIO;
3546         goto out;
3547 out_overflow:
3548         print_overflow_msg(__func__, xdr);
3549         return -EIO;
3550 }
3551
3552 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3553 {
3554         int n;
3555         __be32 *p;
3556         int status = -EIO;
3557
3558         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3559                 goto out;
3560         status = 0;
3561         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3562                 goto out;
3563         dprintk("%s: fsroot ", __func__);
3564         status = decode_pathname(xdr, &res->fs_path);
3565         if (unlikely(status != 0))
3566                 goto out;
3567         p = xdr_inline_decode(xdr, 4);
3568         if (unlikely(!p))
3569                 goto out_overflow;
3570         n = be32_to_cpup(p);
3571         if (n <= 0)
3572                 goto out_eio;
3573         res->nlocations = 0;
3574         while (res->nlocations < n) {
3575                 u32 m;
3576                 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
3577
3578                 p = xdr_inline_decode(xdr, 4);
3579                 if (unlikely(!p))
3580                         goto out_overflow;
3581                 m = be32_to_cpup(p);
3582
3583                 loc->nservers = 0;
3584                 dprintk("%s: servers ", __func__);
3585                 while (loc->nservers < m) {
3586                         struct nfs4_string *server = &loc->servers[loc->nservers];
3587                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3588                         if (unlikely(status != 0))
3589                                 goto out_eio;
3590                         dprintk("%s ", server->data);
3591                         if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
3592                                 loc->nservers++;
3593                         else {
3594                                 unsigned int i;
3595                                 dprintk("%s: using first %u of %u servers "
3596                                         "returned for location %u\n",
3597                                                 __func__,
3598                                                 NFS4_FS_LOCATION_MAXSERVERS,
3599                                                 m, res->nlocations);
3600                                 for (i = loc->nservers; i < m; i++) {
3601                                         unsigned int len;
3602                                         char *data;
3603                                         status = decode_opaque_inline(xdr, &len, &data);
3604                                         if (unlikely(status != 0))
3605                                                 goto out_eio;
3606                                 }
3607                         }
3608                 }
3609                 status = decode_pathname(xdr, &loc->rootpath);
3610                 if (unlikely(status != 0))
3611                         goto out_eio;
3612                 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
3613                         res->nlocations++;
3614         }
3615         if (res->nlocations != 0)
3616                 status = NFS_ATTR_FATTR_V4_REFERRAL;
3617 out:
3618         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3619         return status;
3620 out_overflow:
3621         print_overflow_msg(__func__, xdr);
3622 out_eio:
3623         status = -EIO;
3624         goto out;
3625 }
3626
3627 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3628 {
3629         __be32 *p;
3630         int status = 0;
3631
3632         *res = 0;
3633         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3634                 return -EIO;
3635         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3636                 p = xdr_inline_decode(xdr, 8);
3637                 if (unlikely(!p))
3638                         goto out_overflow;
3639                 xdr_decode_hyper(p, res);
3640                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3641         }
3642         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3643         return status;
3644 out_overflow:
3645         print_overflow_msg(__func__, xdr);
3646         return -EIO;
3647 }
3648
3649 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3650 {
3651         __be32 *p;
3652         int status = 0;
3653
3654         *maxlink = 1;
3655         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3656                 return -EIO;
3657         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3658                 p = xdr_inline_decode(xdr, 4);
3659                 if (unlikely(!p))
3660                         goto out_overflow;
3661                 *maxlink = be32_to_cpup(p);
3662                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3663         }
3664         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3665         return status;
3666 out_overflow:
3667         print_overflow_msg(__func__, xdr);
3668         return -EIO;
3669 }
3670
3671 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3672 {
3673         __be32 *p;
3674         int status = 0;
3675
3676         *maxname = 1024;
3677         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3678                 return -EIO;
3679         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3680                 p = xdr_inline_decode(xdr, 4);
3681                 if (unlikely(!p))
3682                         goto out_overflow;
3683                 *maxname = be32_to_cpup(p);
3684                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3685         }
3686         dprintk("%s: maxname=%u\n", __func__, *maxname);
3687         return status;
3688 out_overflow:
3689         print_overflow_msg(__func__, xdr);
3690         return -EIO;
3691 }
3692
3693 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3694 {
3695         __be32 *p;
3696         int status = 0;
3697
3698         *res = 1024;
3699         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3700                 return -EIO;
3701         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3702                 uint64_t maxread;
3703                 p = xdr_inline_decode(xdr, 8);
3704                 if (unlikely(!p))
3705                         goto out_overflow;
3706                 xdr_decode_hyper(p, &maxread);
3707                 if (maxread > 0x7FFFFFFF)
3708                         maxread = 0x7FFFFFFF;
3709                 *res = (uint32_t)maxread;
3710                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3711         }
3712         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3713         return status;
3714 out_overflow:
3715         print_overflow_msg(__func__, xdr);
3716         return -EIO;
3717 }
3718
3719 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3720 {
3721         __be32 *p;
3722         int status = 0;
3723
3724         *res = 1024;
3725         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3726                 return -EIO;
3727         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3728                 uint64_t maxwrite;
3729                 p = xdr_inline_decode(xdr, 8);
3730                 if (unlikely(!p))
3731                         goto out_overflow;
3732                 xdr_decode_hyper(p, &maxwrite);
3733                 if (maxwrite > 0x7FFFFFFF)
3734                         maxwrite = 0x7FFFFFFF;
3735                 *res = (uint32_t)maxwrite;
3736                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3737         }
3738         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3739         return status;
3740 out_overflow:
3741         print_overflow_msg(__func__, xdr);
3742         return -EIO;
3743 }
3744
3745 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3746 {
3747         uint32_t tmp;
3748         __be32 *p;
3749         int ret = 0;
3750
3751         *mode = 0;
3752         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3753                 return -EIO;
3754         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3755                 p = xdr_inline_decode(xdr, 4);
3756                 if (unlikely(!p))
3757                         goto out_overflow;
3758                 tmp = be32_to_cpup(p);
3759                 *mode = tmp & ~S_IFMT;
3760                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3761                 ret = NFS_ATTR_FATTR_MODE;
3762         }
3763         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3764         return ret;
3765 out_overflow:
3766         print_overflow_msg(__func__, xdr);
3767         return -EIO;
3768 }
3769
3770 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3771 {
3772         __be32 *p;
3773         int ret = 0;
3774
3775         *nlink = 1;
3776         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3777                 return -EIO;
3778         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3779                 p = xdr_inline_decode(xdr, 4);
3780                 if (unlikely(!p))
3781                         goto out_overflow;
3782                 *nlink = be32_to_cpup(p);
3783                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3784                 ret = NFS_ATTR_FATTR_NLINK;
3785         }
3786         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3787         return ret;
3788 out_overflow:
3789         print_overflow_msg(__func__, xdr);
3790         return -EIO;
3791 }
3792
3793 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3794                 const struct nfs_server *server, uint32_t *uid,
3795                 struct nfs4_string *owner_name)
3796 {
3797         uint32_t len;
3798         __be32 *p;
3799         int ret = 0;
3800
3801         *uid = -2;
3802         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3803                 return -EIO;
3804         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3805                 p = xdr_inline_decode(xdr, 4);
3806                 if (unlikely(!p))
3807                         goto out_overflow;
3808                 len = be32_to_cpup(p);
3809                 p = xdr_inline_decode(xdr, len);
3810                 if (unlikely(!p))
3811                         goto out_overflow;
3812                 if (owner_name != NULL) {
3813                         owner_name->data = kmemdup(p, len, GFP_NOWAIT);
3814                         if (owner_name->data != NULL) {
3815                                 owner_name->len = len;
3816                                 ret = NFS_ATTR_FATTR_OWNER_NAME;
3817                         }
3818                 } else if (len < XDR_MAX_NETOBJ) {
3819                         if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3820                                 ret = NFS_ATTR_FATTR_OWNER;
3821                         else
3822                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3823                                                 __func__);
3824                 } else
3825                         dprintk("%s: name too long (%u)!\n",
3826                                         __func__, len);
3827                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3828         }
3829         dprintk("%s: uid=%d\n", __func__, (int)*uid);
3830         return ret;
3831 out_overflow:
3832         print_overflow_msg(__func__, xdr);
3833         return -EIO;
3834 }
3835
3836 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3837                 const struct nfs_server *server, uint32_t *gid,
3838                 struct nfs4_string *group_name)
3839 {
3840         uint32_t len;
3841         __be32 *p;
3842         int ret = 0;
3843
3844         *gid = -2;
3845         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3846                 return -EIO;
3847         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3848                 p = xdr_inline_decode(xdr, 4);
3849                 if (unlikely(!p))
3850                         goto out_overflow;
3851                 len = be32_to_cpup(p);
3852                 p = xdr_inline_decode(xdr, len);
3853                 if (unlikely(!p))
3854                         goto out_overflow;
3855                 if (group_name != NULL) {
3856                         group_name->data = kmemdup(p, len, GFP_NOWAIT);
3857                         if (group_name->data != NULL) {
3858                                 group_name->len = len;
3859                                 ret = NFS_ATTR_FATTR_GROUP_NAME;
3860                         }
3861                 } else if (len < XDR_MAX_NETOBJ) {
3862                         if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3863                                 ret = NFS_ATTR_FATTR_GROUP;
3864                         else
3865                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3866                                                 __func__);
3867                 } else
3868                         dprintk("%s: name too long (%u)!\n",
3869                                         __func__, len);
3870                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3871         }
3872         dprintk("%s: gid=%d\n", __func__, (int)*gid);
3873         return ret;
3874 out_overflow:
3875         print_overflow_msg(__func__, xdr);
3876         return -EIO;
3877 }
3878
3879 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3880 {
3881         uint32_t major = 0, minor = 0;
3882         __be32 *p;
3883         int ret = 0;
3884
3885         *rdev = MKDEV(0,0);
3886         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3887                 return -EIO;
3888         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3889                 dev_t tmp;
3890
3891                 p = xdr_inline_decode(xdr, 8);
3892                 if (unlikely(!p))
3893                         goto out_overflow;
3894                 major = be32_to_cpup(p++);
3895                 minor = be32_to_cpup(p);
3896                 tmp = MKDEV(major, minor);
3897                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3898                         *rdev = tmp;
3899                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3900                 ret = NFS_ATTR_FATTR_RDEV;
3901         }
3902         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3903         return ret;
3904 out_overflow:
3905         print_overflow_msg(__func__, xdr);
3906         return -EIO;
3907 }
3908
3909 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3910 {
3911         __be32 *p;
3912         int status = 0;
3913
3914         *res = 0;
3915         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3916                 return -EIO;
3917         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3918                 p = xdr_inline_decode(xdr, 8);
3919                 if (unlikely(!p))
3920                         goto out_overflow;
3921                 xdr_decode_hyper(p, res);
3922                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3923         }
3924         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3925         return status;
3926 out_overflow:
3927         print_overflow_msg(__func__, xdr);
3928         return -EIO;
3929 }
3930
3931 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3932 {
3933         __be32 *p;
3934         int status = 0;
3935
3936         *res = 0;
3937         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3938                 return -EIO;
3939         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3940                 p = xdr_inline_decode(xdr, 8);
3941                 if (unlikely(!p))
3942                         goto out_overflow;
3943                 xdr_decode_hyper(p, res);
3944                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3945         }
3946         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3947         return status;
3948 out_overflow:
3949         print_overflow_msg(__func__, xdr);
3950         return -EIO;
3951 }
3952
3953 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3954 {
3955         __be32 *p;
3956         int status = 0;
3957
3958         *res = 0;
3959         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3960                 return -EIO;
3961         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3962                 p = xdr_inline_decode(xdr, 8);
3963                 if (unlikely(!p))
3964                         goto out_overflow;
3965                 xdr_decode_hyper(p, res);
3966                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3967         }
3968         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3969         return status;
3970 out_overflow:
3971         print_overflow_msg(__func__, xdr);
3972         return -EIO;
3973 }
3974
3975 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3976 {
3977         __be32 *p;
3978         int ret = 0;
3979
3980         *used = 0;
3981         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3982                 return -EIO;
3983         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3984                 p = xdr_inline_decode(xdr, 8);
3985                 if (unlikely(!p))
3986                         goto out_overflow;
3987                 xdr_decode_hyper(p, used);
3988                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3989                 ret = NFS_ATTR_FATTR_SPACE_USED;
3990         }
3991         dprintk("%s: space used=%Lu\n", __func__,
3992                         (unsigned long long)*used);
3993         return ret;
3994 out_overflow:
3995         print_overflow_msg(__func__, xdr);
3996         return -EIO;
3997 }
3998
3999 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
4000 {
4001         __be32 *p;
4002         uint64_t sec;
4003         uint32_t nsec;
4004
4005         p = xdr_inline_decode(xdr, 12);
4006         if (unlikely(!p))
4007                 goto out_overflow;
4008         p = xdr_decode_hyper(p, &sec);
4009         nsec = be32_to_cpup(p);
4010         time->tv_sec = (time_t)sec;
4011         time->tv_nsec = (long)nsec;
4012         return 0;
4013 out_overflow:
4014         print_overflow_msg(__func__, xdr);
4015         return -EIO;
4016 }
4017
4018 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4019 {
4020         int status = 0;
4021
4022         time->tv_sec = 0;
4023         time->tv_nsec = 0;
4024         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4025                 return -EIO;
4026         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4027                 status = decode_attr_time(xdr, time);
4028                 if (status == 0)
4029                         status = NFS_ATTR_FATTR_ATIME;
4030                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4031         }
4032         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4033         return status;
4034 }
4035
4036 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4037 {
4038         int status = 0;
4039
4040         time->tv_sec = 0;
4041         time->tv_nsec = 0;
4042         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4043                 return -EIO;
4044         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4045                 status = decode_attr_time(xdr, time);
4046                 if (status == 0)
4047                         status = NFS_ATTR_FATTR_CTIME;
4048                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4049         }
4050         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4051         return status;
4052 }
4053
4054 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4055                                   struct timespec *time)
4056 {
4057         int status = 0;
4058
4059         time->tv_sec = 0;
4060         time->tv_nsec = 0;
4061         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4062                 return -EIO;
4063         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4064                 status = decode_attr_time(xdr, time);
4065                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4066         }
4067         dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4068                 (long)time->tv_nsec);
4069         return status;
4070 }
4071
4072 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4073 {
4074         int status = 0;
4075
4076         time->tv_sec = 0;
4077         time->tv_nsec = 0;
4078         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4079                 return -EIO;
4080         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4081                 status = decode_attr_time(xdr, time);
4082                 if (status == 0)
4083                         status = NFS_ATTR_FATTR_MTIME;
4084                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4085         }
4086         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4087         return status;
4088 }
4089
4090 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
4091 {
4092         unsigned int attrwords = XDR_QUADLEN(attrlen);
4093         unsigned int nwords = xdr->p - savep;
4094
4095         if (unlikely(attrwords != nwords)) {
4096                 dprintk("%s: server returned incorrect attribute length: "
4097                         "%u %c %u\n",
4098                                 __func__,
4099                                 attrwords << 2,
4100                                 (attrwords < nwords) ? '<' : '>',
4101                                 nwords << 2);
4102                 return -EIO;
4103         }
4104         return 0;
4105 }
4106
4107 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4108 {
4109         __be32 *p;
4110
4111         p = xdr_inline_decode(xdr, 20);
4112         if (unlikely(!p))
4113                 goto out_overflow;
4114         cinfo->atomic = be32_to_cpup(p++);
4115         p = xdr_decode_hyper(p, &cinfo->before);
4116         xdr_decode_hyper(p, &cinfo->after);
4117         return 0;
4118 out_overflow:
4119         print_overflow_msg(__func__, xdr);
4120         return -EIO;
4121 }
4122
4123 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
4124 {
4125         __be32 *p;
4126         uint32_t supp, acc;
4127         int status;
4128
4129         status = decode_op_hdr(xdr, OP_ACCESS);
4130         if (status)
4131                 return status;
4132         p = xdr_inline_decode(xdr, 8);
4133         if (unlikely(!p))
4134                 goto out_overflow;
4135         supp = be32_to_cpup(p++);
4136         acc = be32_to_cpup(p);
4137         access->supported = supp;
4138         access->access = acc;
4139         return 0;
4140 out_overflow:
4141         print_overflow_msg(__func__, xdr);
4142         return -EIO;
4143 }
4144
4145 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4146 {
4147         __be32 *p;
4148
4149         p = xdr_inline_decode(xdr, len);
4150         if (likely(p)) {
4151                 memcpy(buf, p, len);
4152                 return 0;
4153         }
4154         print_overflow_msg(__func__, xdr);
4155         return -EIO;
4156 }
4157
4158 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4159 {
4160         return decode_opaque_fixed(xdr, stateid->data, NFS4_STATEID_SIZE);
4161 }
4162
4163 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4164 {
4165         int status;
4166
4167         status = decode_op_hdr(xdr, OP_CLOSE);
4168         if (status != -EIO)
4169                 nfs_increment_open_seqid(status, res->seqid);
4170         if (!status)
4171                 status = decode_stateid(xdr, &res->stateid);
4172         return status;
4173 }
4174
4175 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4176 {
4177         return decode_opaque_fixed(xdr, verifier, 8);
4178 }
4179
4180 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
4181 {
4182         int status;
4183
4184         status = decode_op_hdr(xdr, OP_COMMIT);
4185         if (!status)
4186                 status = decode_verifier(xdr, res->verf->verifier);
4187         return status;
4188 }
4189
4190 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4191 {
4192         __be32 *p;
4193         uint32_t bmlen;
4194         int status;
4195
4196         status = decode_op_hdr(xdr, OP_CREATE);
4197         if (status)
4198                 return status;
4199         if ((status = decode_change_info(xdr, cinfo)))
4200                 return status;
4201         p = xdr_inline_decode(xdr, 4);
4202         if (unlikely(!p))
4203                 goto out_overflow;
4204         bmlen = be32_to_cpup(p);
4205         p = xdr_inline_decode(xdr, bmlen << 2);
4206         if (likely(p))
4207                 return 0;
4208 out_overflow:
4209         print_overflow_msg(__func__, xdr);
4210         return -EIO;
4211 }
4212
4213 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4214 {
4215         __be32 *savep;
4216         uint32_t attrlen, bitmap[3] = {0};
4217         int status;
4218
4219         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4220                 goto xdr_error;
4221         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4222                 goto xdr_error;
4223         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4224                 goto xdr_error;
4225         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4226                 goto xdr_error;
4227         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4228                 goto xdr_error;
4229         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4230                 goto xdr_error;
4231         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4232                 goto xdr_error;
4233         status = verify_attr_len(xdr, savep, attrlen);
4234 xdr_error:
4235         dprintk("%s: xdr returned %d!\n", __func__, -status);
4236         return status;
4237 }
4238
4239 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4240 {
4241         __be32 *savep;
4242         uint32_t attrlen, bitmap[3] = {0};
4243         int status;
4244
4245         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4246                 goto xdr_error;
4247         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4248                 goto xdr_error;
4249         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4250                 goto xdr_error;
4251
4252         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4253                 goto xdr_error;
4254         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4255                 goto xdr_error;
4256         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4257                 goto xdr_error;
4258         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4259                 goto xdr_error;
4260         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4261                 goto xdr_error;
4262         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4263                 goto xdr_error;
4264
4265         status = verify_attr_len(xdr, savep, attrlen);
4266 xdr_error:
4267         dprintk("%s: xdr returned %d!\n", __func__, -status);
4268         return status;
4269 }
4270
4271 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4272 {
4273         __be32 *savep;
4274         uint32_t attrlen, bitmap[3] = {0};
4275         int status;
4276
4277         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4278                 goto xdr_error;
4279         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4280                 goto xdr_error;
4281         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4282                 goto xdr_error;
4283
4284         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4285                 goto xdr_error;
4286         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4287                 goto xdr_error;
4288
4289         status = verify_attr_len(xdr, savep, attrlen);
4290 xdr_error:
4291         dprintk("%s: xdr returned %d!\n", __func__, -status);
4292         return status;
4293 }
4294
4295 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4296                 struct nfs_fattr *fattr, struct nfs_fh *fh,
4297                 const struct nfs_server *server)
4298 {
4299         int status;
4300         umode_t fmode = 0;
4301         uint32_t type;
4302         int32_t err;
4303
4304         status = decode_attr_type(xdr, bitmap, &type);
4305         if (status < 0)
4306                 goto xdr_error;
4307         fattr->mode = 0;
4308         if (status != 0) {
4309                 fattr->mode |= nfs_type2fmt[type];
4310                 fattr->valid |= status;
4311         }
4312
4313         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4314         if (status < 0)
4315                 goto xdr_error;
4316         fattr->valid |= status;
4317
4318         status = decode_attr_size(xdr, bitmap, &fattr->size);
4319         if (status < 0)
4320                 goto xdr_error;
4321         fattr->valid |= status;
4322
4323         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4324         if (status < 0)
4325                 goto xdr_error;
4326         fattr->valid |= status;
4327
4328         err = 0;
4329         status = decode_attr_error(xdr, bitmap, &err);
4330         if (status < 0)
4331                 goto xdr_error;
4332         if (err == -NFS4ERR_WRONGSEC)
4333                 nfs_fixup_secinfo_attributes(fattr, fh);
4334
4335         status = decode_attr_filehandle(xdr, bitmap, fh);
4336         if (status < 0)
4337                 goto xdr_error;
4338
4339         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4340         if (status < 0)
4341                 goto xdr_error;
4342         fattr->valid |= status;
4343
4344         status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
4345                                                 struct nfs4_fs_locations,
4346                                                 fattr));
4347         if (status < 0)
4348                 goto xdr_error;
4349         fattr->valid |= status;
4350
4351         status = decode_attr_mode(xdr, bitmap, &fmode);
4352         if (status < 0)
4353                 goto xdr_error;
4354         if (status != 0) {
4355                 fattr->mode |= fmode;
4356                 fattr->valid |= status;
4357         }
4358
4359         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4360         if (status < 0)
4361                 goto xdr_error;
4362         fattr->valid |= status;
4363
4364         status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4365         if (status < 0)
4366                 goto xdr_error;
4367         fattr->valid |= status;
4368
4369         status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4370         if (status < 0)
4371                 goto xdr_error;
4372         fattr->valid |= status;
4373
4374         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4375         if (status < 0)
4376                 goto xdr_error;
4377         fattr->valid |= status;
4378
4379         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4380         if (status < 0)
4381                 goto xdr_error;
4382         fattr->valid |= status;
4383
4384         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4385         if (status < 0)
4386                 goto xdr_error;
4387         fattr->valid |= status;
4388
4389         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4390         if (status < 0)
4391                 goto xdr_error;
4392         fattr->valid |= status;
4393
4394         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4395         if (status < 0)
4396                 goto xdr_error;
4397         fattr->valid |= status;
4398
4399         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4400         if (status < 0)
4401                 goto xdr_error;
4402         fattr->valid |= status;
4403
4404 xdr_error:
4405         dprintk("%s: xdr returned %d\n", __func__, -status);
4406         return status;
4407 }
4408
4409 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4410                 struct nfs_fh *fh, const struct nfs_server *server)
4411 {
4412         __be32 *savep;
4413         uint32_t attrlen,
4414                  bitmap[3] = {0};
4415         int status;
4416
4417         status = decode_op_hdr(xdr, OP_GETATTR);
4418         if (status < 0)
4419                 goto xdr_error;
4420
4421         status = decode_attr_bitmap(xdr, bitmap);
4422         if (status < 0)
4423                 goto xdr_error;
4424
4425         status = decode_attr_length(xdr, &attrlen, &savep);
4426         if (status < 0)
4427                 goto xdr_error;
4428
4429         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, server);
4430         if (status < 0)
4431                 goto xdr_error;
4432
4433         status = verify_attr_len(xdr, savep, attrlen);
4434 xdr_error:
4435         dprintk("%s: xdr returned %d\n", __func__, -status);
4436         return status;
4437 }
4438
4439 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4440                 const struct nfs_server *server)
4441 {
4442         return decode_getfattr_generic(xdr, fattr, NULL, server);
4443 }
4444
4445 /*
4446  * Decode potentially multiple layout types. Currently we only support
4447  * one layout driver per file system.
4448  */
4449 static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4450                                          uint32_t *layouttype)
4451 {
4452         uint32_t *p;
4453         int num;
4454
4455         p = xdr_inline_decode(xdr, 4);
4456         if (unlikely(!p))
4457                 goto out_overflow;
4458         num = be32_to_cpup(p);
4459
4460         /* pNFS is not supported by the underlying file system */
4461         if (num == 0) {
4462                 *layouttype = 0;
4463                 return 0;
4464         }
4465         if (num > 1)
4466                 printk(KERN_INFO "%s: Warning: Multiple pNFS layout drivers "
4467                         "per filesystem not supported\n", __func__);
4468
4469         /* Decode and set first layout type, move xdr->p past unused types */
4470         p = xdr_inline_decode(xdr, num * 4);
4471         if (unlikely(!p))
4472                 goto out_overflow;
4473         *layouttype = be32_to_cpup(p);
4474         return 0;
4475 out_overflow:
4476         print_overflow_msg(__func__, xdr);
4477         return -EIO;
4478 }
4479
4480 /*
4481  * The type of file system exported.
4482  * Note we must ensure that layouttype is set in any non-error case.
4483  */
4484 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4485                                 uint32_t *layouttype)
4486 {
4487         int status = 0;
4488
4489         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4490         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4491                 return -EIO;
4492         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4493                 status = decode_first_pnfs_layout_type(xdr, layouttype);
4494                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4495         } else
4496                 *layouttype = 0;
4497         return status;
4498 }
4499
4500 /*
4501  * The prefered block size for layout directed io
4502  */
4503 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4504                                       uint32_t *res)
4505 {
4506         __be32 *p;
4507
4508         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4509         *res = 0;
4510         if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4511                 p = xdr_inline_decode(xdr, 4);
4512                 if (unlikely(!p)) {
4513                         print_overflow_msg(__func__, xdr);
4514                         return -EIO;
4515                 }
4516                 *res = be32_to_cpup(p);
4517                 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4518         }
4519         return 0;
4520 }
4521
4522 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4523 {
4524         __be32 *savep;
4525         uint32_t attrlen, bitmap[3];
4526         int status;
4527
4528         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4529                 goto xdr_error;
4530         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4531                 goto xdr_error;
4532         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4533                 goto xdr_error;
4534
4535         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4536
4537         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4538                 goto xdr_error;
4539         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4540                 goto xdr_error;
4541         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4542                 goto xdr_error;
4543         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4544         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4545                 goto xdr_error;
4546         fsinfo->wtpref = fsinfo->wtmax;
4547         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4548         if (status != 0)
4549                 goto xdr_error;
4550         status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4551         if (status != 0)
4552                 goto xdr_error;
4553         status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4554         if (status)
4555                 goto xdr_error;
4556
4557         status = verify_attr_len(xdr, savep, attrlen);
4558 xdr_error:
4559         dprintk("%s: xdr returned %d!\n", __func__, -status);
4560         return status;
4561 }
4562
4563 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4564 {
4565         __be32 *p;
4566         uint32_t len;
4567         int status;
4568
4569         /* Zero handle first to allow comparisons */
4570         memset(fh, 0, sizeof(*fh));
4571
4572         status = decode_op_hdr(xdr, OP_GETFH);
4573         if (status)
4574                 return status;
4575
4576         p = xdr_inline_decode(xdr, 4);
4577         if (unlikely(!p))
4578                 goto out_overflow;
4579         len = be32_to_cpup(p);
4580         if (len > NFS4_FHSIZE)
4581                 return -EIO;
4582         fh->size = len;
4583         p = xdr_inline_decode(xdr, len);
4584         if (unlikely(!p))
4585                 goto out_overflow;
4586         memcpy(fh->data, p, len);
4587         return 0;
4588 out_overflow:
4589         print_overflow_msg(__func__, xdr);
4590         return -EIO;
4591 }
4592
4593 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4594 {
4595         int status;
4596
4597         status = decode_op_hdr(xdr, OP_LINK);
4598         if (status)
4599                 return status;
4600         return decode_change_info(xdr, cinfo);
4601 }
4602
4603 /*
4604  * We create the owner, so we know a proper owner.id length is 4.
4605  */
4606 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4607 {
4608         uint64_t offset, length, clientid;
4609         __be32 *p;
4610         uint32_t namelen, type;
4611
4612         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4613         if (unlikely(!p))
4614                 goto out_overflow;
4615         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4616         p = xdr_decode_hyper(p, &length);
4617         type = be32_to_cpup(p++); /* 4 byte read */
4618         if (fl != NULL) { /* manipulate file lock */
4619                 fl->fl_start = (loff_t)offset;
4620                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4621                 if (length == ~(uint64_t)0)
4622                         fl->fl_end = OFFSET_MAX;
4623                 fl->fl_type = F_WRLCK;
4624                 if (type & 1)
4625                         fl->fl_type = F_RDLCK;
4626                 fl->fl_pid = 0;
4627         }
4628         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4629         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4630         p = xdr_inline_decode(xdr, namelen); /* variable size field */
4631         if (likely(p))
4632                 return -NFS4ERR_DENIED;
4633 out_overflow:
4634         print_overflow_msg(__func__, xdr);
4635         return -EIO;
4636 }
4637
4638 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4639 {
4640         int status;
4641
4642         status = decode_op_hdr(xdr, OP_LOCK);
4643         if (status == -EIO)
4644                 goto out;
4645         if (status == 0) {
4646                 status = decode_stateid(xdr, &res->stateid);
4647                 if (unlikely(status))
4648                         goto out;
4649         } else if (status == -NFS4ERR_DENIED)
4650                 status = decode_lock_denied(xdr, NULL);
4651         if (res->open_seqid != NULL)
4652                 nfs_increment_open_seqid(status, res->open_seqid);
4653         nfs_increment_lock_seqid(status, res->lock_seqid);
4654 out:
4655         return status;
4656 }
4657
4658 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4659 {
4660         int status;
4661         status = decode_op_hdr(xdr, OP_LOCKT);
4662         if (status == -NFS4ERR_DENIED)
4663                 return decode_lock_denied(xdr, res->denied);
4664         return status;
4665 }
4666
4667 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4668 {
4669         int status;
4670
4671         status = decode_op_hdr(xdr, OP_LOCKU);
4672         if (status != -EIO)
4673                 nfs_increment_lock_seqid(status, res->seqid);
4674         if (status == 0)
4675                 status = decode_stateid(xdr, &res->stateid);
4676         return status;
4677 }
4678
4679 static int decode_release_lockowner(struct xdr_stream *xdr)
4680 {
4681         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4682 }
4683
4684 static int decode_lookup(struct xdr_stream *xdr)
4685 {
4686         return decode_op_hdr(xdr, OP_LOOKUP);
4687 }
4688
4689 /* This is too sick! */
4690 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4691 {
4692         __be32 *p;
4693         uint32_t limit_type, nblocks, blocksize;
4694
4695         p = xdr_inline_decode(xdr, 12);
4696         if (unlikely(!p))
4697                 goto out_overflow;
4698         limit_type = be32_to_cpup(p++);
4699         switch (limit_type) {
4700         case 1:
4701                 xdr_decode_hyper(p, maxsize);
4702                 break;
4703         case 2:
4704                 nblocks = be32_to_cpup(p++);
4705                 blocksize = be32_to_cpup(p);
4706                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4707         }
4708         return 0;
4709 out_overflow:
4710         print_overflow_msg(__func__, xdr);
4711         return -EIO;
4712 }
4713
4714 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4715 {
4716         __be32 *p;
4717         uint32_t delegation_type;
4718         int status;
4719
4720         p = xdr_inline_decode(xdr, 4);
4721         if (unlikely(!p))
4722                 goto out_overflow;
4723         delegation_type = be32_to_cpup(p);
4724         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4725                 res->delegation_type = 0;
4726                 return 0;
4727         }
4728         status = decode_stateid(xdr, &res->delegation);
4729         if (unlikely(status))
4730                 return status;
4731         p = xdr_inline_decode(xdr, 4);
4732         if (unlikely(!p))
4733                 goto out_overflow;
4734         res->do_recall = be32_to_cpup(p);
4735
4736         switch (delegation_type) {
4737         case NFS4_OPEN_DELEGATE_READ:
4738                 res->delegation_type = FMODE_READ;
4739                 break;
4740         case NFS4_OPEN_DELEGATE_WRITE:
4741                 res->delegation_type = FMODE_WRITE|FMODE_READ;
4742                 if (decode_space_limit(xdr, &res->maxsize) < 0)
4743                                 return -EIO;
4744         }
4745         return decode_ace(xdr, NULL, res->server->nfs_client);
4746 out_overflow:
4747         print_overflow_msg(__func__, xdr);
4748         return -EIO;
4749 }
4750
4751 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
4752 {
4753         __be32 *p;
4754         uint32_t savewords, bmlen, i;
4755         int status;
4756
4757         status = decode_op_hdr(xdr, OP_OPEN);
4758         if (status != -EIO)
4759                 nfs_increment_open_seqid(status, res->seqid);
4760         if (!status)
4761                 status = decode_stateid(xdr, &res->stateid);
4762         if (unlikely(status))
4763                 return status;
4764
4765         decode_change_info(xdr, &res->cinfo);
4766
4767         p = xdr_inline_decode(xdr, 8);
4768         if (unlikely(!p))
4769                 goto out_overflow;
4770         res->rflags = be32_to_cpup(p++);
4771         bmlen = be32_to_cpup(p);
4772         if (bmlen > 10)
4773                 goto xdr_error;
4774
4775         p = xdr_inline_decode(xdr, bmlen << 2);
4776         if (unlikely(!p))
4777                 goto out_overflow;
4778         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
4779         for (i = 0; i < savewords; ++i)
4780                 res->attrset[i] = be32_to_cpup(p++);
4781         for (; i < NFS4_BITMAP_SIZE; i++)
4782                 res->attrset[i] = 0;
4783
4784         return decode_delegation(xdr, res);
4785 xdr_error:
4786         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
4787         return -EIO;
4788 out_overflow:
4789         print_overflow_msg(__func__, xdr);
4790         return -EIO;
4791 }
4792
4793 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
4794 {
4795         int status;
4796
4797         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
4798         if (status != -EIO)
4799                 nfs_increment_open_seqid(status, res->seqid);
4800         if (!status)
4801                 status = decode_stateid(xdr, &res->stateid);
4802         return status;
4803 }
4804
4805 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
4806 {
4807         int status;
4808
4809         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
4810         if (status != -EIO)
4811                 nfs_increment_open_seqid(status, res->seqid);
4812         if (!status)
4813                 status = decode_stateid(xdr, &res->stateid);
4814         return status;
4815 }
4816
4817 static int decode_putfh(struct xdr_stream *xdr)
4818 {
4819         return decode_op_hdr(xdr, OP_PUTFH);
4820 }
4821
4822 static int decode_putrootfh(struct xdr_stream *xdr)
4823 {
4824         return decode_op_hdr(xdr, OP_PUTROOTFH);
4825 }
4826
4827 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
4828 {
4829         struct kvec *iov = req->rq_rcv_buf.head;
4830         __be32 *p;
4831         uint32_t count, eof, recvd, hdrlen;
4832         int status;
4833
4834         status = decode_op_hdr(xdr, OP_READ);
4835         if (status)
4836                 return status;
4837         p = xdr_inline_decode(xdr, 8);
4838         if (unlikely(!p))
4839                 goto out_overflow;
4840         eof = be32_to_cpup(p++);
4841         count = be32_to_cpup(p);
4842         hdrlen = (u8 *) xdr->p - (u8 *) iov->iov_base;
4843         recvd = req->rq_rcv_buf.len - hdrlen;
4844         if (count > recvd) {
4845                 dprintk("NFS: server cheating in read reply: "
4846                                 "count %u > recvd %u\n", count, recvd);
4847                 count = recvd;
4848                 eof = 0;
4849         }
4850         xdr_read_pages(xdr, count);
4851         res->eof = eof;
4852         res->count = count;
4853         return 0;
4854 out_overflow:
4855         print_overflow_msg(__func__, xdr);
4856         return -EIO;
4857 }
4858
4859 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
4860 {
4861         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
4862         struct kvec     *iov = rcvbuf->head;
4863         size_t          hdrlen;
4864         u32             recvd, pglen = rcvbuf->page_len;
4865         int             status;
4866
4867         status = decode_op_hdr(xdr, OP_READDIR);
4868         if (!status)
4869                 status = decode_verifier(xdr, readdir->verifier.data);
4870         if (unlikely(status))
4871                 return status;
4872         dprintk("%s: verifier = %08x:%08x\n",
4873                         __func__,
4874                         ((u32 *)readdir->verifier.data)[0],
4875                         ((u32 *)readdir->verifier.data)[1]);
4876
4877
4878         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4879         recvd = rcvbuf->len - hdrlen;
4880         if (pglen > recvd)
4881                 pglen = recvd;
4882         xdr_read_pages(xdr, pglen);
4883
4884
4885         return pglen;
4886 }
4887
4888 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
4889 {
4890         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4891         struct kvec *iov = rcvbuf->head;
4892         size_t hdrlen;
4893         u32 len, recvd;
4894         __be32 *p;
4895         int status;
4896
4897         status = decode_op_hdr(xdr, OP_READLINK);
4898         if (status)
4899                 return status;
4900
4901         /* Convert length of symlink */
4902         p = xdr_inline_decode(xdr, 4);
4903         if (unlikely(!p))
4904                 goto out_overflow;
4905         len = be32_to_cpup(p);
4906         if (len >= rcvbuf->page_len || len <= 0) {
4907                 dprintk("nfs: server returned giant symlink!\n");
4908                 return -ENAMETOOLONG;
4909         }
4910         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4911         recvd = req->rq_rcv_buf.len - hdrlen;
4912         if (recvd < len) {
4913                 dprintk("NFS: server cheating in readlink reply: "
4914                                 "count %u > recvd %u\n", len, recvd);
4915                 return -EIO;
4916         }
4917         xdr_read_pages(xdr, len);
4918         /*
4919          * The XDR encode routine has set things up so that
4920          * the link text will be copied directly into the
4921          * buffer.  We just have to do overflow-checking,
4922          * and and null-terminate the text (the VFS expects
4923          * null-termination).
4924          */
4925         xdr_terminate_string(rcvbuf, len);
4926         return 0;
4927 out_overflow:
4928         print_overflow_msg(__func__, xdr);
4929         return -EIO;
4930 }
4931
4932 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4933 {
4934         int status;
4935
4936         status = decode_op_hdr(xdr, OP_REMOVE);
4937         if (status)
4938                 goto out;
4939         status = decode_change_info(xdr, cinfo);
4940 out:
4941         return status;
4942 }
4943
4944 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
4945               struct nfs4_change_info *new_cinfo)
4946 {
4947         int status;
4948
4949         status = decode_op_hdr(xdr, OP_RENAME);
4950         if (status)
4951                 goto out;
4952         if ((status = decode_change_info(xdr, old_cinfo)))
4953                 goto out;
4954         status = decode_change_info(xdr, new_cinfo);
4955 out:
4956         return status;
4957 }
4958
4959 static int decode_renew(struct xdr_stream *xdr)
4960 {
4961         return decode_op_hdr(xdr, OP_RENEW);
4962 }
4963
4964 static int
4965 decode_restorefh(struct xdr_stream *xdr)
4966 {
4967         return decode_op_hdr(xdr, OP_RESTOREFH);
4968 }
4969
4970 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
4971                          struct nfs_getaclres *res)
4972 {
4973         __be32 *savep, *bm_p;
4974         uint32_t attrlen,
4975                  bitmap[3] = {0};
4976         struct kvec *iov = req->rq_rcv_buf.head;
4977         int status;
4978
4979         res->acl_len = 0;
4980         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4981                 goto out;
4982         bm_p = xdr->p;
4983         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4984                 goto out;
4985         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4986                 goto out;
4987
4988         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
4989                 return -EIO;
4990         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
4991                 size_t hdrlen;
4992                 u32 recvd;
4993
4994                 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
4995                  * are stored with the acl data to handle the problem of
4996                  * variable length bitmaps.*/
4997                 xdr->p = bm_p;
4998                 res->acl_data_offset = be32_to_cpup(bm_p) + 2;
4999                 res->acl_data_offset <<= 2;
5000
5001                 /* We ignore &savep and don't do consistency checks on
5002                  * the attr length.  Let userspace figure it out.... */
5003                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
5004                 attrlen += res->acl_data_offset;
5005                 recvd = req->rq_rcv_buf.len - hdrlen;
5006                 if (attrlen > recvd) {
5007                         if (res->acl_flags & NFS4_ACL_LEN_REQUEST) {
5008                                 /* getxattr interface called with a NULL buf */
5009                                 res->acl_len = attrlen;
5010                                 goto out;
5011                         }
5012                         dprintk("NFS: acl reply: attrlen %u > recvd %u\n",
5013                                         attrlen, recvd);
5014                         return -EINVAL;
5015                 }
5016                 xdr_read_pages(xdr, attrlen);
5017                 res->acl_len = attrlen;
5018         } else
5019                 status = -EOPNOTSUPP;
5020
5021 out:
5022         return status;
5023 }
5024
5025 static int
5026 decode_savefh(struct xdr_stream *xdr)
5027 {
5028         return decode_op_hdr(xdr, OP_SAVEFH);
5029 }
5030
5031 static int decode_setattr(struct xdr_stream *xdr)
5032 {
5033         __be32 *p;
5034         uint32_t bmlen;
5035         int status;
5036
5037         status = decode_op_hdr(xdr, OP_SETATTR);
5038         if (status)
5039                 return status;
5040         p = xdr_inline_decode(xdr, 4);
5041         if (unlikely(!p))
5042                 goto out_overflow;
5043         bmlen = be32_to_cpup(p);
5044         p = xdr_inline_decode(xdr, bmlen << 2);
5045         if (likely(p))
5046                 return 0;
5047 out_overflow:
5048         print_overflow_msg(__func__, xdr);
5049         return -EIO;
5050 }
5051
5052 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5053 {
5054         __be32 *p;
5055         uint32_t opnum;
5056         int32_t nfserr;
5057
5058         p = xdr_inline_decode(xdr, 8);
5059         if (unlikely(!p))
5060                 goto out_overflow;
5061         opnum = be32_to_cpup(p++);
5062         if (opnum != OP_SETCLIENTID) {
5063                 dprintk("nfs: decode_setclientid: Server returned operation"
5064                         " %d\n", opnum);
5065                 return -EIO;
5066         }
5067         nfserr = be32_to_cpup(p);
5068         if (nfserr == NFS_OK) {
5069                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5070                 if (unlikely(!p))
5071                         goto out_overflow;
5072                 p = xdr_decode_hyper(p, &res->clientid);
5073                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5074         } else if (nfserr == NFSERR_CLID_INUSE) {
5075                 uint32_t len;
5076
5077                 /* skip netid string */
5078                 p = xdr_inline_decode(xdr, 4);
5079                 if (unlikely(!p))
5080                         goto out_overflow;
5081                 len = be32_to_cpup(p);
5082                 p = xdr_inline_decode(xdr, len);
5083                 if (unlikely(!p))
5084                         goto out_overflow;
5085
5086                 /* skip uaddr string */
5087                 p = xdr_inline_decode(xdr, 4);
5088                 if (unlikely(!p))
5089                         goto out_overflow;
5090                 len = be32_to_cpup(p);
5091                 p = xdr_inline_decode(xdr, len);
5092                 if (unlikely(!p))
5093                         goto out_overflow;
5094                 return -NFSERR_CLID_INUSE;
5095         } else
5096                 return nfs4_stat_to_errno(nfserr);
5097
5098         return 0;
5099 out_overflow:
5100         print_overflow_msg(__func__, xdr);
5101         return -EIO;
5102 }
5103
5104 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5105 {
5106         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5107 }
5108
5109 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
5110 {
5111         __be32 *p;
5112         int status;
5113
5114         status = decode_op_hdr(xdr, OP_WRITE);
5115         if (status)
5116                 return status;
5117
5118         p = xdr_inline_decode(xdr, 16);
5119         if (unlikely(!p))
5120                 goto out_overflow;
5121         res->count = be32_to_cpup(p++);
5122         res->verf->committed = be32_to_cpup(p++);
5123         memcpy(res->verf->verifier, p, 8);
5124         return 0;
5125 out_overflow:
5126         print_overflow_msg(__func__, xdr);
5127         return -EIO;
5128 }
5129
5130 static int decode_delegreturn(struct xdr_stream *xdr)
5131 {
5132         return decode_op_hdr(xdr, OP_DELEGRETURN);
5133 }
5134
5135 static int decode_secinfo_gss(struct xdr_stream *xdr, struct nfs4_secinfo_flavor *flavor)
5136 {
5137         __be32 *p;
5138
5139         p = xdr_inline_decode(xdr, 4);
5140         if (unlikely(!p))
5141                 goto out_overflow;
5142         flavor->gss.sec_oid4.len = be32_to_cpup(p);
5143         if (flavor->gss.sec_oid4.len > GSS_OID_MAX_LEN)
5144                 goto out_err;
5145
5146         p = xdr_inline_decode(xdr, flavor->gss.sec_oid4.len);
5147         if (unlikely(!p))
5148                 goto out_overflow;
5149         memcpy(flavor->gss.sec_oid4.data, p, flavor->gss.sec_oid4.len);
5150
5151         p = xdr_inline_decode(xdr, 8);
5152         if (unlikely(!p))
5153                 goto out_overflow;
5154         flavor->gss.qop4 = be32_to_cpup(p++);
5155         flavor->gss.service = be32_to_cpup(p);
5156
5157         return 0;
5158
5159 out_overflow:
5160         print_overflow_msg(__func__, xdr);
5161         return -EIO;
5162 out_err:
5163         return -EINVAL;
5164 }
5165
5166 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5167 {
5168         struct nfs4_secinfo_flavor *sec_flavor;
5169         int status;
5170         __be32 *p;
5171         int i, num_flavors;
5172
5173         status = decode_op_hdr(xdr, OP_SECINFO);
5174         if (status)
5175                 goto out;
5176         p = xdr_inline_decode(xdr, 4);
5177         if (unlikely(!p))
5178                 goto out_overflow;
5179
5180         res->flavors->num_flavors = 0;
5181         num_flavors = be32_to_cpup(p);
5182
5183         for (i = 0; i < num_flavors; i++) {
5184                 sec_flavor = &res->flavors->flavors[i];
5185                 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5186                         break;
5187
5188                 p = xdr_inline_decode(xdr, 4);
5189                 if (unlikely(!p))
5190                         goto out_overflow;
5191                 sec_flavor->flavor = be32_to_cpup(p);
5192
5193                 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5194                         status = decode_secinfo_gss(xdr, sec_flavor);
5195                         if (status)
5196                                 goto out;
5197                 }
5198                 res->flavors->num_flavors++;
5199         }
5200
5201 out:
5202         return status;
5203 out_overflow:
5204         print_overflow_msg(__func__, xdr);
5205         return -EIO;
5206 }
5207
5208 #if defined(CONFIG_NFS_V4_1)
5209 static int decode_exchange_id(struct xdr_stream *xdr,
5210                               struct nfs41_exchange_id_res *res)
5211 {
5212         __be32 *p;
5213         uint32_t dummy;
5214         char *dummy_str;
5215         int status;
5216         struct nfs_client *clp = res->client;
5217
5218         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5219         if (status)
5220                 return status;
5221
5222         p = xdr_inline_decode(xdr, 8);
5223         if (unlikely(!p))
5224                 goto out_overflow;
5225         xdr_decode_hyper(p, &clp->cl_clientid);
5226         p = xdr_inline_decode(xdr, 12);
5227         if (unlikely(!p))
5228                 goto out_overflow;
5229         clp->cl_seqid = be32_to_cpup(p++);
5230         clp->cl_exchange_flags = be32_to_cpup(p++);
5231
5232         /* We ask for SP4_NONE */
5233         dummy = be32_to_cpup(p);
5234         if (dummy != SP4_NONE)
5235                 return -EIO;
5236
5237         /* Throw away minor_id */
5238         p = xdr_inline_decode(xdr, 8);
5239         if (unlikely(!p))
5240                 goto out_overflow;
5241
5242         /* Throw away Major id */
5243         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5244         if (unlikely(status))
5245                 return status;
5246
5247         /* Save server_scope */
5248         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5249         if (unlikely(status))
5250                 return status;
5251
5252         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5253                 return -EIO;
5254
5255         memcpy(res->server_scope->server_scope, dummy_str, dummy);
5256         res->server_scope->server_scope_sz = dummy;
5257
5258         /* Throw away Implementation id array */
5259         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5260         if (unlikely(status))
5261                 return status;
5262
5263         return 0;
5264 out_overflow:
5265         print_overflow_msg(__func__, xdr);
5266         return -EIO;
5267 }
5268
5269 static int decode_chan_attrs(struct xdr_stream *xdr,
5270                              struct nfs4_channel_attrs *attrs)
5271 {
5272         __be32 *p;
5273         u32 nr_attrs, val;
5274
5275         p = xdr_inline_decode(xdr, 28);
5276         if (unlikely(!p))
5277                 goto out_overflow;
5278         val = be32_to_cpup(p++);        /* headerpadsz */
5279         if (val)
5280                 return -EINVAL;         /* no support for header padding yet */
5281         attrs->max_rqst_sz = be32_to_cpup(p++);
5282         attrs->max_resp_sz = be32_to_cpup(p++);
5283         attrs->max_resp_sz_cached = be32_to_cpup(p++);
5284         attrs->max_ops = be32_to_cpup(p++);
5285         attrs->max_reqs = be32_to_cpup(p++);
5286         nr_attrs = be32_to_cpup(p);
5287         if (unlikely(nr_attrs > 1)) {
5288                 printk(KERN_WARNING "%s: Invalid rdma channel attrs count %u\n",
5289                         __func__, nr_attrs);
5290                 return -EINVAL;
5291         }
5292         if (nr_attrs == 1) {
5293                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5294                 if (unlikely(!p))
5295                         goto out_overflow;
5296         }
5297         return 0;
5298 out_overflow:
5299         print_overflow_msg(__func__, xdr);
5300         return -EIO;
5301 }
5302
5303 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5304 {
5305         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5306 }
5307
5308 static int decode_create_session(struct xdr_stream *xdr,
5309                                  struct nfs41_create_session_res *res)
5310 {
5311         __be32 *p;
5312         int status;
5313         struct nfs_client *clp = res->client;
5314         struct nfs4_session *session = clp->cl_session;
5315
5316         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5317         if (!status)
5318                 status = decode_sessionid(xdr, &session->sess_id);
5319         if (unlikely(status))
5320                 return status;
5321
5322         /* seqid, flags */
5323         p = xdr_inline_decode(xdr, 8);
5324         if (unlikely(!p))
5325                 goto out_overflow;
5326         clp->cl_seqid = be32_to_cpup(p++);
5327         session->flags = be32_to_cpup(p);
5328
5329         /* Channel attributes */
5330         status = decode_chan_attrs(xdr, &session->fc_attrs);
5331         if (!status)
5332                 status = decode_chan_attrs(xdr, &session->bc_attrs);
5333         return status;
5334 out_overflow:
5335         print_overflow_msg(__func__, xdr);
5336         return -EIO;
5337 }
5338
5339 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5340 {
5341         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5342 }
5343
5344 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5345 {
5346         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5347 }
5348 #endif /* CONFIG_NFS_V4_1 */
5349
5350 static int decode_sequence(struct xdr_stream *xdr,
5351                            struct nfs4_sequence_res *res,
5352                            struct rpc_rqst *rqstp)
5353 {
5354 #if defined(CONFIG_NFS_V4_1)
5355         struct nfs4_sessionid id;
5356         u32 dummy;
5357         int status;
5358         __be32 *p;
5359
5360         if (!res->sr_session)
5361                 return 0;
5362
5363         status = decode_op_hdr(xdr, OP_SEQUENCE);
5364         if (!status)
5365                 status = decode_sessionid(xdr, &id);
5366         if (unlikely(status))
5367                 goto out_err;
5368
5369         /*
5370          * If the server returns different values for sessionID, slotID or
5371          * sequence number, the server is looney tunes.
5372          */
5373         status = -EREMOTEIO;
5374
5375         if (memcmp(id.data, res->sr_session->sess_id.data,
5376                    NFS4_MAX_SESSIONID_LEN)) {
5377                 dprintk("%s Invalid session id\n", __func__);
5378                 goto out_err;
5379         }
5380
5381         p = xdr_inline_decode(xdr, 20);
5382         if (unlikely(!p))
5383                 goto out_overflow;
5384
5385         /* seqid */
5386         dummy = be32_to_cpup(p++);
5387         if (dummy != res->sr_slot->seq_nr) {
5388                 dprintk("%s Invalid sequence number\n", __func__);
5389                 goto out_err;
5390         }
5391         /* slot id */
5392         dummy = be32_to_cpup(p++);
5393         if (dummy != res->sr_slot - res->sr_session->fc_slot_table.slots) {
5394                 dprintk("%s Invalid slot id\n", __func__);
5395                 goto out_err;
5396         }
5397         /* highest slot id - currently not processed */
5398         dummy = be32_to_cpup(p++);
5399         /* target highest slot id - currently not processed */
5400         dummy = be32_to_cpup(p++);
5401         /* result flags */
5402         res->sr_status_flags = be32_to_cpup(p);
5403         status = 0;
5404 out_err:
5405         res->sr_status = status;
5406         return status;
5407 out_overflow:
5408         print_overflow_msg(__func__, xdr);
5409         status = -EIO;
5410         goto out_err;
5411 #else  /* CONFIG_NFS_V4_1 */
5412         return 0;
5413 #endif /* CONFIG_NFS_V4_1 */
5414 }
5415
5416 #if defined(CONFIG_NFS_V4_1)
5417 /*
5418  * TODO: Need to handle case when EOF != true;
5419  */
5420 static int decode_getdevicelist(struct xdr_stream *xdr,
5421                                 struct pnfs_devicelist *res)
5422 {
5423         __be32 *p;
5424         int status, i;
5425         struct nfs_writeverf verftemp;
5426
5427         status = decode_op_hdr(xdr, OP_GETDEVICELIST);
5428         if (status)
5429                 return status;
5430
5431         p = xdr_inline_decode(xdr, 8 + 8 + 4);
5432         if (unlikely(!p))
5433                 goto out_overflow;
5434
5435         /* TODO: Skip cookie for now */
5436         p += 2;
5437
5438         /* Read verifier */
5439         p = xdr_decode_opaque_fixed(p, verftemp.verifier, 8);
5440
5441         res->num_devs = be32_to_cpup(p);
5442
5443         dprintk("%s: num_dev %d\n", __func__, res->num_devs);
5444
5445         if (res->num_devs > NFS4_PNFS_GETDEVLIST_MAXNUM) {
5446                 printk(KERN_ERR "%s too many result dev_num %u\n",
5447                                 __func__, res->num_devs);
5448                 return -EIO;
5449         }
5450
5451         p = xdr_inline_decode(xdr,
5452                               res->num_devs * NFS4_DEVICEID4_SIZE + 4);
5453         if (unlikely(!p))
5454                 goto out_overflow;
5455         for (i = 0; i < res->num_devs; i++)
5456                 p = xdr_decode_opaque_fixed(p, res->dev_id[i].data,
5457                                             NFS4_DEVICEID4_SIZE);
5458         res->eof = be32_to_cpup(p);
5459         return 0;
5460 out_overflow:
5461         print_overflow_msg(__func__, xdr);
5462         return -EIO;
5463 }
5464
5465 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5466                                 struct pnfs_device *pdev)
5467 {
5468         __be32 *p;
5469         uint32_t len, type;
5470         int status;
5471
5472         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5473         if (status) {
5474                 if (status == -ETOOSMALL) {
5475                         p = xdr_inline_decode(xdr, 4);
5476                         if (unlikely(!p))
5477                                 goto out_overflow;
5478                         pdev->mincount = be32_to_cpup(p);
5479                         dprintk("%s: Min count too small. mincnt = %u\n",
5480                                 __func__, pdev->mincount);
5481                 }
5482                 return status;
5483         }
5484
5485         p = xdr_inline_decode(xdr, 8);
5486         if (unlikely(!p))
5487                 goto out_overflow;
5488         type = be32_to_cpup(p++);
5489         if (type != pdev->layout_type) {
5490                 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5491                         __func__, pdev->layout_type, type);
5492                 return -EINVAL;
5493         }
5494         /*
5495          * Get the length of the opaque device_addr4. xdr_read_pages places
5496          * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5497          * and places the remaining xdr data in xdr_buf->tail
5498          */
5499         pdev->mincount = be32_to_cpup(p);
5500         xdr_read_pages(xdr, pdev->mincount); /* include space for the length */
5501
5502         /* Parse notification bitmap, verifying that it is zero. */
5503         p = xdr_inline_decode(xdr, 4);
5504         if (unlikely(!p))
5505                 goto out_overflow;
5506         len = be32_to_cpup(p);
5507         if (len) {
5508                 uint32_t i;
5509
5510                 p = xdr_inline_decode(xdr, 4 * len);
5511                 if (unlikely(!p))
5512                         goto out_overflow;
5513                 for (i = 0; i < len; i++, p++) {
5514                         if (be32_to_cpup(p)) {
5515                                 dprintk("%s: notifications not supported\n",
5516                                         __func__);
5517                                 return -EIO;
5518                         }
5519                 }
5520         }
5521         return 0;
5522 out_overflow:
5523         print_overflow_msg(__func__, xdr);
5524         return -EIO;
5525 }
5526
5527 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5528                             struct nfs4_layoutget_res *res)
5529 {
5530         __be32 *p;
5531         int status;
5532         u32 layout_count;
5533         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5534         struct kvec *iov = rcvbuf->head;
5535         u32 hdrlen, recvd;
5536
5537         status = decode_op_hdr(xdr, OP_LAYOUTGET);
5538         if (status)
5539                 return status;
5540         p = xdr_inline_decode(xdr, 8 + NFS4_STATEID_SIZE);
5541         if (unlikely(!p))
5542                 goto out_overflow;
5543         res->return_on_close = be32_to_cpup(p++);
5544         p = xdr_decode_opaque_fixed(p, res->stateid.data, NFS4_STATEID_SIZE);
5545         layout_count = be32_to_cpup(p);
5546         if (!layout_count) {
5547                 dprintk("%s: server responded with empty layout array\n",
5548                         __func__);
5549                 return -EINVAL;
5550         }
5551
5552         p = xdr_inline_decode(xdr, 28);
5553         if (unlikely(!p))
5554                 goto out_overflow;
5555         p = xdr_decode_hyper(p, &res->range.offset);
5556         p = xdr_decode_hyper(p, &res->range.length);
5557         res->range.iomode = be32_to_cpup(p++);
5558         res->type = be32_to_cpup(p++);
5559         res->layoutp->len = be32_to_cpup(p);
5560
5561         dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5562                 __func__,
5563                 (unsigned long)res->range.offset,
5564                 (unsigned long)res->range.length,
5565                 res->range.iomode,
5566                 res->type,
5567                 res->layoutp->len);
5568
5569         hdrlen = (u8 *) xdr->p - (u8 *) iov->iov_base;
5570         recvd = req->rq_rcv_buf.len - hdrlen;
5571         if (res->layoutp->len > recvd) {
5572                 dprintk("NFS: server cheating in layoutget reply: "
5573                                 "layout len %u > recvd %u\n",
5574                                 res->layoutp->len, recvd);
5575                 return -EINVAL;
5576         }
5577
5578         xdr_read_pages(xdr, res->layoutp->len);
5579
5580         if (layout_count > 1) {
5581                 /* We only handle a length one array at the moment.  Any
5582                  * further entries are just ignored.  Note that this means
5583                  * the client may see a response that is less than the
5584                  * minimum it requested.
5585                  */
5586                 dprintk("%s: server responded with %d layouts, dropping tail\n",
5587                         __func__, layout_count);
5588         }
5589
5590         return 0;
5591 out_overflow:
5592         print_overflow_msg(__func__, xdr);
5593         return -EIO;
5594 }
5595
5596 static int decode_layoutreturn(struct xdr_stream *xdr,
5597                                struct nfs4_layoutreturn_res *res)
5598 {
5599         __be32 *p;
5600         int status;
5601
5602         status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5603         if (status)
5604                 return status;
5605         p = xdr_inline_decode(xdr, 4);
5606         if (unlikely(!p))
5607                 goto out_overflow;
5608         res->lrs_present = be32_to_cpup(p);
5609         if (res->lrs_present)
5610                 status = decode_stateid(xdr, &res->stateid);
5611         return status;
5612 out_overflow:
5613         print_overflow_msg(__func__, xdr);
5614         return -EIO;
5615 }
5616
5617 static int decode_layoutcommit(struct xdr_stream *xdr,
5618                                struct rpc_rqst *req,
5619                                struct nfs4_layoutcommit_res *res)
5620 {
5621         __be32 *p;
5622         __u32 sizechanged;
5623         int status;
5624
5625         status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5626         res->status = status;
5627         if (status)
5628                 return status;
5629
5630         p = xdr_inline_decode(xdr, 4);
5631         if (unlikely(!p))
5632                 goto out_overflow;
5633         sizechanged = be32_to_cpup(p);
5634
5635         if (sizechanged) {
5636                 /* throw away new size */
5637                 p = xdr_inline_decode(xdr, 8);
5638                 if (unlikely(!p))
5639                         goto out_overflow;
5640         }
5641         return 0;
5642 out_overflow:
5643         print_overflow_msg(__func__, xdr);
5644         return -EIO;
5645 }
5646
5647 static int decode_test_stateid(struct xdr_stream *xdr,
5648                                struct nfs41_test_stateid_res *res)
5649 {
5650         __be32 *p;
5651         int status;
5652         int num_res;
5653
5654         status = decode_op_hdr(xdr, OP_TEST_STATEID);
5655         if (status)
5656                 return status;
5657
5658         p = xdr_inline_decode(xdr, 4);
5659         if (unlikely(!p))
5660                 goto out_overflow;
5661         num_res = be32_to_cpup(p++);
5662         if (num_res != 1)
5663                 goto out;
5664
5665         p = xdr_inline_decode(xdr, 4);
5666         if (unlikely(!p))
5667                 goto out_overflow;
5668         res->status = be32_to_cpup(p++);
5669         return res->status;
5670 out_overflow:
5671         print_overflow_msg(__func__, xdr);
5672 out:
5673         return -EIO;
5674 }
5675
5676 static int decode_free_stateid(struct xdr_stream *xdr,
5677                                struct nfs41_free_stateid_res *res)
5678 {
5679         __be32 *p;
5680         int status;
5681
5682         status = decode_op_hdr(xdr, OP_FREE_STATEID);
5683         if (status)
5684                 return status;
5685
5686         p = xdr_inline_decode(xdr, 4);
5687         if (unlikely(!p))
5688                 goto out_overflow;
5689         res->status = be32_to_cpup(p++);
5690         return res->status;
5691 out_overflow:
5692         print_overflow_msg(__func__, xdr);
5693         return -EIO;
5694 }
5695 #endif /* CONFIG_NFS_V4_1 */
5696
5697 /*
5698  * END OF "GENERIC" DECODE ROUTINES.
5699  */
5700
5701 /*
5702  * Decode OPEN_DOWNGRADE response
5703  */
5704 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
5705                                        struct xdr_stream *xdr,
5706                                        struct nfs_closeres *res)
5707 {
5708         struct compound_hdr hdr;
5709         int status;
5710
5711         status = decode_compound_hdr(xdr, &hdr);
5712         if (status)
5713                 goto out;
5714         status = decode_sequence(xdr, &res->seq_res, rqstp);
5715         if (status)
5716                 goto out;
5717         status = decode_putfh(xdr);
5718         if (status)
5719                 goto out;
5720         status = decode_open_downgrade(xdr, res);
5721         if (status != 0)
5722                 goto out;
5723         decode_getfattr(xdr, res->fattr, res->server);
5724 out:
5725         return status;
5726 }
5727
5728 /*
5729  * Decode ACCESS response
5730  */
5731 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5732                                struct nfs4_accessres *res)
5733 {
5734         struct compound_hdr hdr;
5735         int status;
5736
5737         status = decode_compound_hdr(xdr, &hdr);
5738         if (status)
5739                 goto out;
5740         status = decode_sequence(xdr, &res->seq_res, rqstp);
5741         if (status)
5742                 goto out;
5743         status = decode_putfh(xdr);
5744         if (status != 0)
5745                 goto out;
5746         status = decode_access(xdr, res);
5747         if (status != 0)
5748                 goto out;
5749         decode_getfattr(xdr, res->fattr, res->server);
5750 out:
5751         return status;
5752 }
5753
5754 /*
5755  * Decode LOOKUP response
5756  */
5757 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5758                                struct nfs4_lookup_res *res)
5759 {
5760         struct compound_hdr hdr;
5761         int status;
5762
5763         status = decode_compound_hdr(xdr, &hdr);
5764         if (status)
5765                 goto out;
5766         status = decode_sequence(xdr, &res->seq_res, rqstp);
5767         if (status)
5768                 goto out;
5769         status = decode_putfh(xdr);
5770         if (status)
5771                 goto out;
5772         status = decode_lookup(xdr);
5773         if (status)
5774                 goto out;
5775         status = decode_getfh(xdr, res->fh);
5776         if (status)
5777                 goto out;
5778         status = decode_getfattr(xdr, res->fattr, res->server);
5779 out:
5780         return status;
5781 }
5782
5783 /*
5784  * Decode LOOKUP_ROOT response
5785  */
5786 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
5787                                     struct xdr_stream *xdr,
5788                                     struct nfs4_lookup_res *res)
5789 {
5790         struct compound_hdr hdr;
5791         int status;
5792
5793         status = decode_compound_hdr(xdr, &hdr);
5794         if (status)
5795                 goto out;
5796         status = decode_sequence(xdr, &res->seq_res, rqstp);
5797         if (status)
5798                 goto out;
5799         status = decode_putrootfh(xdr);
5800         if (status)
5801                 goto out;
5802         status = decode_getfh(xdr, res->fh);
5803         if (status == 0)
5804                 status = decode_getfattr(xdr, res->fattr, res->server);
5805 out:
5806         return status;
5807 }
5808
5809 /*
5810  * Decode REMOVE response
5811  */
5812 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5813                                struct nfs_removeres *res)
5814 {
5815         struct compound_hdr hdr;
5816         int status;
5817
5818         status = decode_compound_hdr(xdr, &hdr);
5819         if (status)
5820                 goto out;
5821         status = decode_sequence(xdr, &res->seq_res, rqstp);
5822         if (status)
5823                 goto out;
5824         status = decode_putfh(xdr);
5825         if (status)
5826                 goto out;
5827         status = decode_remove(xdr, &res->cinfo);
5828         if (status)
5829                 goto out;
5830         decode_getfattr(xdr, res->dir_attr, res->server);
5831 out:
5832         return status;
5833 }
5834
5835 /*
5836  * Decode RENAME response
5837  */
5838 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5839                                struct nfs_renameres *res)
5840 {
5841         struct compound_hdr hdr;
5842         int status;
5843
5844         status = decode_compound_hdr(xdr, &hdr);
5845         if (status)
5846                 goto out;
5847         status = decode_sequence(xdr, &res->seq_res, rqstp);
5848         if (status)
5849                 goto out;
5850         status = decode_putfh(xdr);
5851         if (status)
5852                 goto out;
5853         status = decode_savefh(xdr);
5854         if (status)
5855                 goto out;
5856         status = decode_putfh(xdr);
5857         if (status)
5858                 goto out;
5859         status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
5860         if (status)
5861                 goto out;
5862         /* Current FH is target directory */
5863         if (decode_getfattr(xdr, res->new_fattr, res->server))
5864                 goto out;
5865         status = decode_restorefh(xdr);
5866         if (status)
5867                 goto out;
5868         decode_getfattr(xdr, res->old_fattr, res->server);
5869 out:
5870         return status;
5871 }
5872
5873 /*
5874  * Decode LINK response
5875  */
5876 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5877                              struct nfs4_link_res *res)
5878 {
5879         struct compound_hdr hdr;
5880         int status;
5881
5882         status = decode_compound_hdr(xdr, &hdr);
5883         if (status)
5884                 goto out;
5885         status = decode_sequence(xdr, &res->seq_res, rqstp);
5886         if (status)
5887                 goto out;
5888         status = decode_putfh(xdr);
5889         if (status)
5890                 goto out;
5891         status = decode_savefh(xdr);
5892         if (status)
5893                 goto out;
5894         status = decode_putfh(xdr);
5895         if (status)
5896                 goto out;
5897         status = decode_link(xdr, &res->cinfo);
5898         if (status)
5899                 goto out;
5900         /*
5901          * Note order: OP_LINK leaves the directory as the current
5902          *             filehandle.
5903          */
5904         if (decode_getfattr(xdr, res->dir_attr, res->server))
5905                 goto out;
5906         status = decode_restorefh(xdr);
5907         if (status)
5908                 goto out;
5909         decode_getfattr(xdr, res->fattr, res->server);
5910 out:
5911         return status;
5912 }
5913
5914 /*
5915  * Decode CREATE response
5916  */
5917 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5918                                struct nfs4_create_res *res)
5919 {
5920         struct compound_hdr hdr;
5921         int status;
5922
5923         status = decode_compound_hdr(xdr, &hdr);
5924         if (status)
5925                 goto out;
5926         status = decode_sequence(xdr, &res->seq_res, rqstp);
5927         if (status)
5928                 goto out;
5929         status = decode_putfh(xdr);
5930         if (status)
5931                 goto out;
5932         status = decode_savefh(xdr);
5933         if (status)
5934                 goto out;
5935         status = decode_create(xdr, &res->dir_cinfo);
5936         if (status)
5937                 goto out;
5938         status = decode_getfh(xdr, res->fh);
5939         if (status)
5940                 goto out;
5941         if (decode_getfattr(xdr, res->fattr, res->server))
5942                 goto out;
5943         status = decode_restorefh(xdr);
5944         if (status)
5945                 goto out;
5946         decode_getfattr(xdr, res->dir_fattr, res->server);
5947 out:
5948         return status;
5949 }
5950
5951 /*
5952  * Decode SYMLINK response
5953  */
5954 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5955                                 struct nfs4_create_res *res)
5956 {
5957         return nfs4_xdr_dec_create(rqstp, xdr, res);
5958 }
5959
5960 /*
5961  * Decode GETATTR response
5962  */
5963 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5964                                 struct nfs4_getattr_res *res)
5965 {
5966         struct compound_hdr hdr;
5967         int status;
5968
5969         status = decode_compound_hdr(xdr, &hdr);
5970         if (status)
5971                 goto out;
5972         status = decode_sequence(xdr, &res->seq_res, rqstp);
5973         if (status)
5974                 goto out;
5975         status = decode_putfh(xdr);
5976         if (status)
5977                 goto out;
5978         status = decode_getfattr(xdr, res->fattr, res->server);
5979 out:
5980         return status;
5981 }
5982
5983 /*
5984  * Encode an SETACL request
5985  */
5986 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
5987                                 struct nfs_setaclargs *args)
5988 {
5989         struct compound_hdr hdr = {
5990                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
5991         };
5992
5993         encode_compound_hdr(xdr, req, &hdr);
5994         encode_sequence(xdr, &args->seq_args, &hdr);
5995         encode_putfh(xdr, args->fh, &hdr);
5996         encode_setacl(xdr, args, &hdr);
5997         encode_nops(&hdr);
5998 }
5999
6000 /*
6001  * Decode SETACL response
6002  */
6003 static int
6004 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6005                     struct nfs_setaclres *res)
6006 {
6007         struct compound_hdr hdr;
6008         int status;
6009
6010         status = decode_compound_hdr(xdr, &hdr);
6011         if (status)
6012                 goto out;
6013         status = decode_sequence(xdr, &res->seq_res, rqstp);
6014         if (status)
6015                 goto out;
6016         status = decode_putfh(xdr);
6017         if (status)
6018                 goto out;
6019         status = decode_setattr(xdr);
6020 out:
6021         return status;
6022 }
6023
6024 /*
6025  * Decode GETACL response
6026  */
6027 static int
6028 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6029                     struct nfs_getaclres *res)
6030 {
6031         struct compound_hdr hdr;
6032         int status;
6033
6034         if (res->acl_scratch != NULL) {
6035                 void *p = page_address(res->acl_scratch);
6036                 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6037         }
6038         status = decode_compound_hdr(xdr, &hdr);
6039         if (status)
6040                 goto out;
6041         status = decode_sequence(xdr, &res->seq_res, rqstp);
6042         if (status)
6043                 goto out;
6044         status = decode_putfh(xdr);
6045         if (status)
6046                 goto out;
6047         status = decode_getacl(xdr, rqstp, res);
6048
6049 out:
6050         return status;
6051 }
6052
6053 /*
6054  * Decode CLOSE response
6055  */
6056 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6057                               struct nfs_closeres *res)
6058 {
6059         struct compound_hdr hdr;
6060         int status;
6061
6062         status = decode_compound_hdr(xdr, &hdr);
6063         if (status)
6064                 goto out;
6065         status = decode_sequence(xdr, &res->seq_res, rqstp);
6066         if (status)
6067                 goto out;
6068         status = decode_putfh(xdr);
6069         if (status)
6070                 goto out;
6071         status = decode_close(xdr, res);
6072         if (status != 0)
6073                 goto out;
6074         /*
6075          * Note: Server may do delete on close for this file
6076          *      in which case the getattr call will fail with
6077          *      an ESTALE error. Shouldn't be a problem,
6078          *      though, since fattr->valid will remain unset.
6079          */
6080         decode_getfattr(xdr, res->fattr, res->server);
6081 out:
6082         return status;
6083 }
6084
6085 /*
6086  * Decode OPEN response
6087  */
6088 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6089                              struct nfs_openres *res)
6090 {
6091         struct compound_hdr hdr;
6092         int status;
6093
6094         status = decode_compound_hdr(xdr, &hdr);
6095         if (status)
6096                 goto out;
6097         status = decode_sequence(xdr, &res->seq_res, rqstp);
6098         if (status)
6099                 goto out;
6100         status = decode_putfh(xdr);
6101         if (status)
6102                 goto out;
6103         status = decode_savefh(xdr);
6104         if (status)
6105                 goto out;
6106         status = decode_open(xdr, res);
6107         if (status)
6108                 goto out;
6109         if (decode_getfh(xdr, &res->fh) != 0)
6110                 goto out;
6111         if (decode_getfattr(xdr, res->f_attr, res->server) != 0)
6112                 goto out;
6113         if (decode_restorefh(xdr) != 0)
6114                 goto out;
6115         decode_getfattr(xdr, res->dir_attr, res->server);
6116 out:
6117         return status;
6118 }
6119
6120 /*
6121  * Decode OPEN_CONFIRM response
6122  */
6123 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6124                                      struct xdr_stream *xdr,
6125                                      struct nfs_open_confirmres *res)
6126 {
6127         struct compound_hdr hdr;
6128         int status;
6129
6130         status = decode_compound_hdr(xdr, &hdr);
6131         if (status)
6132                 goto out;
6133         status = decode_putfh(xdr);
6134         if (status)
6135                 goto out;
6136         status = decode_open_confirm(xdr, res);
6137 out:
6138         return status;
6139 }
6140
6141 /*
6142  * Decode OPEN response
6143  */
6144 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6145                                     struct xdr_stream *xdr,
6146                                     struct nfs_openres *res)
6147 {
6148         struct compound_hdr hdr;
6149         int status;
6150
6151         status = decode_compound_hdr(xdr, &hdr);
6152         if (status)
6153                 goto out;
6154         status = decode_sequence(xdr, &res->seq_res, rqstp);
6155         if (status)
6156                 goto out;
6157         status = decode_putfh(xdr);
6158         if (status)
6159                 goto out;
6160         status = decode_open(xdr, res);
6161         if (status)
6162                 goto out;
6163         decode_getfattr(xdr, res->f_attr, res->server);
6164 out:
6165         return status;
6166 }
6167
6168 /*
6169  * Decode SETATTR response
6170  */
6171 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6172                                 struct xdr_stream *xdr,
6173                                 struct nfs_setattrres *res)
6174 {
6175         struct compound_hdr hdr;
6176         int status;
6177
6178         status = decode_compound_hdr(xdr, &hdr);
6179         if (status)
6180                 goto out;
6181         status = decode_sequence(xdr, &res->seq_res, rqstp);
6182         if (status)
6183                 goto out;
6184         status = decode_putfh(xdr);
6185         if (status)
6186                 goto out;
6187         status = decode_setattr(xdr);
6188         if (status)
6189                 goto out;
6190         decode_getfattr(xdr, res->fattr, res->server);
6191 out:
6192         return status;
6193 }
6194
6195 /*
6196  * Decode LOCK response
6197  */
6198 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6199                              struct nfs_lock_res *res)
6200 {
6201         struct compound_hdr hdr;
6202         int status;
6203
6204         status = decode_compound_hdr(xdr, &hdr);
6205         if (status)
6206                 goto out;
6207         status = decode_sequence(xdr, &res->seq_res, rqstp);
6208         if (status)
6209                 goto out;
6210         status = decode_putfh(xdr);
6211         if (status)
6212                 goto out;
6213         status = decode_lock(xdr, res);
6214 out:
6215         return status;
6216 }
6217
6218 /*
6219  * Decode LOCKT response
6220  */
6221 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6222                               struct nfs_lockt_res *res)
6223 {
6224         struct compound_hdr hdr;
6225         int status;
6226
6227         status = decode_compound_hdr(xdr, &hdr);
6228         if (status)
6229                 goto out;
6230         status = decode_sequence(xdr, &res->seq_res, rqstp);
6231         if (status)
6232                 goto out;
6233         status = decode_putfh(xdr);
6234         if (status)
6235                 goto out;
6236         status = decode_lockt(xdr, res);
6237 out:
6238         return status;
6239 }
6240
6241 /*
6242  * Decode LOCKU response
6243  */
6244 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6245                               struct nfs_locku_res *res)
6246 {
6247         struct compound_hdr hdr;
6248         int status;
6249
6250         status = decode_compound_hdr(xdr, &hdr);
6251         if (status)
6252                 goto out;
6253         status = decode_sequence(xdr, &res->seq_res, rqstp);
6254         if (status)
6255                 goto out;
6256         status = decode_putfh(xdr);
6257         if (status)
6258                 goto out;
6259         status = decode_locku(xdr, res);
6260 out:
6261         return status;
6262 }
6263
6264 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6265                                           struct xdr_stream *xdr, void *dummy)
6266 {
6267         struct compound_hdr hdr;
6268         int status;
6269
6270         status = decode_compound_hdr(xdr, &hdr);
6271         if (!status)
6272                 status = decode_release_lockowner(xdr);
6273         return status;
6274 }
6275
6276 /*
6277  * Decode READLINK response
6278  */
6279 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6280                                  struct xdr_stream *xdr,
6281                                  struct nfs4_readlink_res *res)
6282 {
6283         struct compound_hdr hdr;
6284         int status;
6285
6286         status = decode_compound_hdr(xdr, &hdr);
6287         if (status)
6288                 goto out;
6289         status = decode_sequence(xdr, &res->seq_res, rqstp);
6290         if (status)
6291                 goto out;
6292         status = decode_putfh(xdr);
6293         if (status)
6294                 goto out;
6295         status = decode_readlink(xdr, rqstp);
6296 out:
6297         return status;
6298 }
6299
6300 /*
6301  * Decode READDIR response
6302  */
6303 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6304                                 struct nfs4_readdir_res *res)
6305 {
6306         struct compound_hdr hdr;
6307         int status;
6308
6309         status = decode_compound_hdr(xdr, &hdr);
6310         if (status)
6311                 goto out;
6312         status = decode_sequence(xdr, &res->seq_res, rqstp);
6313         if (status)
6314                 goto out;
6315         status = decode_putfh(xdr);
6316         if (status)
6317                 goto out;
6318         status = decode_readdir(xdr, rqstp, res);
6319 out:
6320         return status;
6321 }
6322
6323 /*
6324  * Decode Read response
6325  */
6326 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6327                              struct nfs_readres *res)
6328 {
6329         struct compound_hdr hdr;
6330         int status;
6331
6332         status = decode_compound_hdr(xdr, &hdr);
6333         if (status)
6334                 goto out;
6335         status = decode_sequence(xdr, &res->seq_res, rqstp);
6336         if (status)
6337                 goto out;
6338         status = decode_putfh(xdr);
6339         if (status)
6340                 goto out;
6341         status = decode_read(xdr, rqstp, res);
6342         if (!status)
6343                 status = res->count;
6344 out:
6345         return status;
6346 }
6347
6348 /*
6349  * Decode WRITE response
6350  */
6351 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6352                               struct nfs_writeres *res)
6353 {
6354         struct compound_hdr hdr;
6355         int status;
6356
6357         status = decode_compound_hdr(xdr, &hdr);
6358         if (status)
6359                 goto out;
6360         status = decode_sequence(xdr, &res->seq_res, rqstp);
6361         if (status)
6362                 goto out;
6363         status = decode_putfh(xdr);
6364         if (status)
6365                 goto out;
6366         status = decode_write(xdr, res);
6367         if (status)
6368                 goto out;
6369         if (res->fattr)
6370                 decode_getfattr(xdr, res->fattr, res->server);
6371         if (!status)
6372                 status = res->count;
6373 out:
6374         return status;
6375 }
6376
6377 /*
6378  * Decode COMMIT response
6379  */
6380 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6381                                struct nfs_writeres *res)
6382 {
6383         struct compound_hdr hdr;
6384         int status;
6385
6386         status = decode_compound_hdr(xdr, &hdr);
6387         if (status)
6388                 goto out;
6389         status = decode_sequence(xdr, &res->seq_res, rqstp);
6390         if (status)
6391                 goto out;
6392         status = decode_putfh(xdr);
6393         if (status)
6394                 goto out;
6395         status = decode_commit(xdr, res);
6396         if (status)
6397                 goto out;
6398         if (res->fattr)
6399                 decode_getfattr(xdr, res->fattr, res->server);
6400 out:
6401         return status;
6402 }
6403
6404 /*
6405  * Decode FSINFO response
6406  */
6407 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6408                                struct nfs4_fsinfo_res *res)
6409 {
6410         struct compound_hdr hdr;
6411         int status;
6412
6413         status = decode_compound_hdr(xdr, &hdr);
6414         if (!status)
6415                 status = decode_sequence(xdr, &res->seq_res, req);
6416         if (!status)
6417                 status = decode_putfh(xdr);
6418         if (!status)
6419                 status = decode_fsinfo(xdr, res->fsinfo);
6420         return status;
6421 }
6422
6423 /*
6424  * Decode PATHCONF response
6425  */
6426 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6427                                  struct nfs4_pathconf_res *res)
6428 {
6429         struct compound_hdr hdr;
6430         int status;
6431
6432         status = decode_compound_hdr(xdr, &hdr);
6433         if (!status)
6434                 status = decode_sequence(xdr, &res->seq_res, req);
6435         if (!status)
6436                 status = decode_putfh(xdr);
6437         if (!status)
6438                 status = decode_pathconf(xdr, res->pathconf);
6439         return status;
6440 }
6441
6442 /*
6443  * Decode STATFS response
6444  */
6445 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6446                                struct nfs4_statfs_res *res)
6447 {
6448         struct compound_hdr hdr;
6449         int status;
6450
6451         status = decode_compound_hdr(xdr, &hdr);
6452         if (!status)
6453                 status = decode_sequence(xdr, &res->seq_res, req);
6454         if (!status)
6455                 status = decode_putfh(xdr);
6456         if (!status)
6457                 status = decode_statfs(xdr, res->fsstat);
6458         return status;
6459 }
6460
6461 /*
6462  * Decode GETATTR_BITMAP response
6463  */
6464 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6465                                     struct xdr_stream *xdr,
6466                                     struct nfs4_server_caps_res *res)
6467 {
6468         struct compound_hdr hdr;
6469         int status;
6470
6471         status = decode_compound_hdr(xdr, &hdr);
6472         if (status)
6473                 goto out;
6474         status = decode_sequence(xdr, &res->seq_res, req);
6475         if (status)
6476                 goto out;
6477         status = decode_putfh(xdr);
6478         if (status)
6479                 goto out;
6480         status = decode_server_caps(xdr, res);
6481 out:
6482         return status;
6483 }
6484
6485 /*
6486  * Decode RENEW response
6487  */
6488 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6489                               void *__unused)
6490 {
6491         struct compound_hdr hdr;
6492         int status;
6493
6494         status = decode_compound_hdr(xdr, &hdr);
6495         if (!status)
6496                 status = decode_renew(xdr);
6497         return status;
6498 }
6499
6500 /*
6501  * Decode SETCLIENTID response
6502  */
6503 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6504                                     struct xdr_stream *xdr,
6505                                     struct nfs4_setclientid_res *res)
6506 {
6507         struct compound_hdr hdr;
6508         int status;
6509
6510         status = decode_compound_hdr(xdr, &hdr);
6511         if (!status)
6512                 status = decode_setclientid(xdr, res);
6513         return status;
6514 }
6515
6516 /*
6517  * Decode SETCLIENTID_CONFIRM response
6518  */
6519 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6520                                             struct xdr_stream *xdr,
6521                                             struct nfs_fsinfo *fsinfo)
6522 {
6523         struct compound_hdr hdr;
6524         int status;
6525
6526         status = decode_compound_hdr(xdr, &hdr);
6527         if (!status)
6528                 status = decode_setclientid_confirm(xdr);
6529         if (!status)
6530                 status = decode_putrootfh(xdr);
6531         if (!status)
6532                 status = decode_fsinfo(xdr, fsinfo);
6533         return status;
6534 }
6535
6536 /*
6537  * Decode DELEGRETURN response
6538  */
6539 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6540                                     struct xdr_stream *xdr,
6541                                     struct nfs4_delegreturnres *res)
6542 {
6543         struct compound_hdr hdr;
6544         int status;
6545
6546         status = decode_compound_hdr(xdr, &hdr);
6547         if (status)
6548                 goto out;
6549         status = decode_sequence(xdr, &res->seq_res, rqstp);
6550         if (status)
6551                 goto out;
6552         status = decode_putfh(xdr);
6553         if (status != 0)
6554                 goto out;
6555         status = decode_delegreturn(xdr);
6556         if (status != 0)
6557                 goto out;
6558         decode_getfattr(xdr, res->fattr, res->server);
6559 out:
6560         return status;
6561 }
6562
6563 /*
6564  * Decode FS_LOCATIONS response
6565  */
6566 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6567                                      struct xdr_stream *xdr,
6568                                      struct nfs4_fs_locations_res *res)
6569 {
6570         struct compound_hdr hdr;
6571         int status;
6572
6573         status = decode_compound_hdr(xdr, &hdr);
6574         if (status)
6575                 goto out;
6576         status = decode_sequence(xdr, &res->seq_res, req);
6577         if (status)
6578                 goto out;
6579         status = decode_putfh(xdr);
6580         if (status)
6581                 goto out;
6582         status = decode_lookup(xdr);
6583         if (status)
6584                 goto out;
6585         xdr_enter_page(xdr, PAGE_SIZE);
6586         status = decode_getfattr(xdr, &res->fs_locations->fattr,
6587                                  res->fs_locations->server);
6588 out:
6589         return status;
6590 }
6591
6592 /*
6593  * Decode SECINFO response
6594  */
6595 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6596                                 struct xdr_stream *xdr,
6597                                 struct nfs4_secinfo_res *res)
6598 {
6599         struct compound_hdr hdr;
6600         int status;
6601
6602         status = decode_compound_hdr(xdr, &hdr);
6603         if (status)
6604                 goto out;
6605         status = decode_sequence(xdr, &res->seq_res, rqstp);
6606         if (status)
6607                 goto out;
6608         status = decode_putfh(xdr);
6609         if (status)
6610                 goto out;
6611         status = decode_secinfo(xdr, res);
6612 out:
6613         return status;
6614 }
6615
6616 #if defined(CONFIG_NFS_V4_1)
6617 /*
6618  * Decode EXCHANGE_ID response
6619  */
6620 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
6621                                     struct xdr_stream *xdr,
6622                                     void *res)
6623 {
6624         struct compound_hdr hdr;
6625         int status;
6626
6627         status = decode_compound_hdr(xdr, &hdr);
6628         if (!status)
6629                 status = decode_exchange_id(xdr, res);
6630         return status;
6631 }
6632
6633 /*
6634  * Decode CREATE_SESSION response
6635  */
6636 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
6637                                        struct xdr_stream *xdr,
6638                                        struct nfs41_create_session_res *res)
6639 {
6640         struct compound_hdr hdr;
6641         int status;
6642
6643         status = decode_compound_hdr(xdr, &hdr);
6644         if (!status)
6645                 status = decode_create_session(xdr, res);
6646         return status;
6647 }
6648
6649 /*
6650  * Decode DESTROY_SESSION response
6651  */
6652 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
6653                                         struct xdr_stream *xdr,
6654                                         void *res)
6655 {
6656         struct compound_hdr hdr;
6657         int status;
6658
6659         status = decode_compound_hdr(xdr, &hdr);
6660         if (!status)
6661                 status = decode_destroy_session(xdr, res);
6662         return status;
6663 }
6664
6665 /*
6666  * Decode SEQUENCE response
6667  */
6668 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
6669                                  struct xdr_stream *xdr,
6670                                  struct nfs4_sequence_res *res)
6671 {
6672         struct compound_hdr hdr;
6673         int status;
6674
6675         status = decode_compound_hdr(xdr, &hdr);
6676         if (!status)
6677                 status = decode_sequence(xdr, res, rqstp);
6678         return status;
6679 }
6680
6681 /*
6682  * Decode GET_LEASE_TIME response
6683  */
6684 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
6685                                        struct xdr_stream *xdr,
6686                                        struct nfs4_get_lease_time_res *res)
6687 {
6688         struct compound_hdr hdr;
6689         int status;
6690
6691         status = decode_compound_hdr(xdr, &hdr);
6692         if (!status)
6693                 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
6694         if (!status)
6695                 status = decode_putrootfh(xdr);
6696         if (!status)
6697                 status = decode_fsinfo(xdr, res->lr_fsinfo);
6698         return status;
6699 }
6700
6701 /*
6702  * Decode RECLAIM_COMPLETE response
6703  */
6704 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
6705                                          struct xdr_stream *xdr,
6706                                          struct nfs41_reclaim_complete_res *res)
6707 {
6708         struct compound_hdr hdr;
6709         int status;
6710
6711         status = decode_compound_hdr(xdr, &hdr);
6712         if (!status)
6713                 status = decode_sequence(xdr, &res->seq_res, rqstp);
6714         if (!status)
6715                 status = decode_reclaim_complete(xdr, (void *)NULL);
6716         return status;
6717 }
6718
6719 /*
6720  * Decode GETDEVICELIST response
6721  */
6722 static int nfs4_xdr_dec_getdevicelist(struct rpc_rqst *rqstp,
6723                                       struct xdr_stream *xdr,
6724                                       struct nfs4_getdevicelist_res *res)
6725 {
6726         struct compound_hdr hdr;
6727         int status;
6728
6729         dprintk("encoding getdevicelist!\n");
6730
6731         status = decode_compound_hdr(xdr, &hdr);
6732         if (status != 0)
6733                 goto out;
6734         status = decode_sequence(xdr, &res->seq_res, rqstp);
6735         if (status != 0)
6736                 goto out;
6737         status = decode_putfh(xdr);
6738         if (status != 0)
6739                 goto out;
6740         status = decode_getdevicelist(xdr, res->devlist);
6741 out:
6742         return status;
6743 }
6744
6745 /*
6746  * Decode GETDEVINFO response
6747  */
6748 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
6749                                       struct xdr_stream *xdr,
6750                                       struct nfs4_getdeviceinfo_res *res)
6751 {
6752         struct compound_hdr hdr;
6753         int status;
6754
6755         status = decode_compound_hdr(xdr, &hdr);
6756         if (status != 0)
6757                 goto out;
6758         status = decode_sequence(xdr, &res->seq_res, rqstp);
6759         if (status != 0)
6760                 goto out;
6761         status = decode_getdeviceinfo(xdr, res->pdev);
6762 out:
6763         return status;
6764 }
6765
6766 /*
6767  * Decode LAYOUTGET response
6768  */
6769 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
6770                                   struct xdr_stream *xdr,
6771                                   struct nfs4_layoutget_res *res)
6772 {
6773         struct compound_hdr hdr;
6774         int status;
6775
6776         status = decode_compound_hdr(xdr, &hdr);
6777         if (status)
6778                 goto out;
6779         status = decode_sequence(xdr, &res->seq_res, rqstp);
6780         if (status)
6781                 goto out;
6782         status = decode_putfh(xdr);
6783         if (status)
6784                 goto out;
6785         status = decode_layoutget(xdr, rqstp, res);
6786 out:
6787         return status;
6788 }
6789
6790 /*
6791  * Decode LAYOUTRETURN response
6792  */
6793 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
6794                                      struct xdr_stream *xdr,
6795                                      struct nfs4_layoutreturn_res *res)
6796 {
6797         struct compound_hdr hdr;
6798         int status;
6799
6800         status = decode_compound_hdr(xdr, &hdr);
6801         if (status)
6802                 goto out;
6803         status = decode_sequence(xdr, &res->seq_res, rqstp);
6804         if (status)
6805                 goto out;
6806         status = decode_putfh(xdr);
6807         if (status)
6808                 goto out;
6809         status = decode_layoutreturn(xdr, res);
6810 out:
6811         return status;
6812 }
6813
6814 /*
6815  * Decode LAYOUTCOMMIT response
6816  */
6817 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
6818                                      struct xdr_stream *xdr,
6819                                      struct nfs4_layoutcommit_res *res)
6820 {
6821         struct compound_hdr hdr;
6822         int status;
6823
6824         status = decode_compound_hdr(xdr, &hdr);
6825         if (status)
6826                 goto out;
6827         status = decode_sequence(xdr, &res->seq_res, rqstp);
6828         if (status)
6829                 goto out;
6830         status = decode_putfh(xdr);
6831         if (status)
6832                 goto out;
6833         status = decode_layoutcommit(xdr, rqstp, res);
6834         if (status)
6835                 goto out;
6836         decode_getfattr(xdr, res->fattr, res->server);
6837 out:
6838         return status;
6839 }
6840
6841 /*
6842  * Decode SECINFO_NO_NAME response
6843  */
6844 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
6845                                         struct xdr_stream *xdr,
6846                                         struct nfs4_secinfo_res *res)
6847 {
6848         struct compound_hdr hdr;
6849         int status;
6850
6851         status = decode_compound_hdr(xdr, &hdr);
6852         if (status)
6853                 goto out;
6854         status = decode_sequence(xdr, &res->seq_res, rqstp);
6855         if (status)
6856                 goto out;
6857         status = decode_putrootfh(xdr);
6858         if (status)
6859                 goto out;
6860         status = decode_secinfo(xdr, res);
6861 out:
6862         return status;
6863 }
6864
6865 /*
6866  * Decode TEST_STATEID response
6867  */
6868 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
6869                                      struct xdr_stream *xdr,
6870                                      struct nfs41_test_stateid_res *res)
6871 {
6872         struct compound_hdr hdr;
6873         int status;
6874
6875         status = decode_compound_hdr(xdr, &hdr);
6876         if (status)
6877                 goto out;
6878         status = decode_sequence(xdr, &res->seq_res, rqstp);
6879         if (status)
6880                 goto out;
6881         status = decode_test_stateid(xdr, res);
6882 out:
6883         return status;
6884 }
6885
6886 /*
6887  * Decode FREE_STATEID response
6888  */
6889 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
6890                                      struct xdr_stream *xdr,
6891                                      struct nfs41_free_stateid_res *res)
6892 {
6893         struct compound_hdr hdr;
6894         int status;
6895
6896         status = decode_compound_hdr(xdr, &hdr);
6897         if (status)
6898                 goto out;
6899         status = decode_sequence(xdr, &res->seq_res, rqstp);
6900         if (status)
6901                 goto out;
6902         status = decode_free_stateid(xdr, res);
6903 out:
6904         return status;
6905 }
6906 #endif /* CONFIG_NFS_V4_1 */
6907
6908 /**
6909  * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
6910  *                      the local page cache.
6911  * @xdr: XDR stream where entry resides
6912  * @entry: buffer to fill in with entry data
6913  * @plus: boolean indicating whether this should be a readdirplus entry
6914  *
6915  * Returns zero if successful, otherwise a negative errno value is
6916  * returned.
6917  *
6918  * This function is not invoked during READDIR reply decoding, but
6919  * rather whenever an application invokes the getdents(2) system call
6920  * on a directory already in our cache.
6921  */
6922 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
6923                        int plus)
6924 {
6925         uint32_t bitmap[3] = {0};
6926         uint32_t len;
6927         __be32 *p = xdr_inline_decode(xdr, 4);
6928         if (unlikely(!p))
6929                 goto out_overflow;
6930         if (*p == xdr_zero) {
6931                 p = xdr_inline_decode(xdr, 4);
6932                 if (unlikely(!p))
6933                         goto out_overflow;
6934                 if (*p == xdr_zero)
6935                         return -EAGAIN;
6936                 entry->eof = 1;
6937                 return -EBADCOOKIE;
6938         }
6939
6940         p = xdr_inline_decode(xdr, 12);
6941         if (unlikely(!p))
6942                 goto out_overflow;
6943         entry->prev_cookie = entry->cookie;
6944         p = xdr_decode_hyper(p, &entry->cookie);
6945         entry->len = be32_to_cpup(p);
6946
6947         p = xdr_inline_decode(xdr, entry->len);
6948         if (unlikely(!p))
6949                 goto out_overflow;
6950         entry->name = (const char *) p;
6951
6952         /*
6953          * In case the server doesn't return an inode number,
6954          * we fake one here.  (We don't use inode number 0,
6955          * since glibc seems to choke on it...)
6956          */
6957         entry->ino = 1;
6958         entry->fattr->valid = 0;
6959
6960         if (decode_attr_bitmap(xdr, bitmap) < 0)
6961                 goto out_overflow;
6962
6963         if (decode_attr_length(xdr, &len, &p) < 0)
6964                 goto out_overflow;
6965
6966         if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
6967                                         entry->server) < 0)
6968                 goto out_overflow;
6969         if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
6970                 entry->ino = entry->fattr->mounted_on_fileid;
6971         else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
6972                 entry->ino = entry->fattr->fileid;
6973
6974         entry->d_type = DT_UNKNOWN;
6975         if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
6976                 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
6977
6978         return 0;
6979
6980 out_overflow:
6981         print_overflow_msg(__func__, xdr);
6982         return -EAGAIN;
6983 }
6984
6985 /*
6986  * We need to translate between nfs status return values and
6987  * the local errno values which may not be the same.
6988  */
6989 static struct {
6990         int stat;
6991         int errno;
6992 } nfs_errtbl[] = {
6993         { NFS4_OK,              0               },
6994         { NFS4ERR_PERM,         -EPERM          },
6995         { NFS4ERR_NOENT,        -ENOENT         },
6996         { NFS4ERR_IO,           -errno_NFSERR_IO},
6997         { NFS4ERR_NXIO,         -ENXIO          },
6998         { NFS4ERR_ACCESS,       -EACCES         },
6999         { NFS4ERR_EXIST,        -EEXIST         },
7000         { NFS4ERR_XDEV,         -EXDEV          },
7001         { NFS4ERR_NOTDIR,       -ENOTDIR        },
7002         { NFS4ERR_ISDIR,        -EISDIR         },
7003         { NFS4ERR_INVAL,        -EINVAL         },
7004         { NFS4ERR_FBIG,         -EFBIG          },
7005         { NFS4ERR_NOSPC,        -ENOSPC         },
7006         { NFS4ERR_ROFS,         -EROFS          },
7007         { NFS4ERR_MLINK,        -EMLINK         },
7008         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
7009         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
7010         { NFS4ERR_DQUOT,        -EDQUOT         },
7011         { NFS4ERR_STALE,        -ESTALE         },
7012         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
7013         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
7014         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
7015         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
7016         { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
7017         { NFS4ERR_BADTYPE,      -EBADTYPE       },
7018         { NFS4ERR_LOCKED,       -EAGAIN         },
7019         { NFS4ERR_SYMLINK,      -ELOOP          },
7020         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
7021         { NFS4ERR_DEADLOCK,     -EDEADLK        },
7022         { -1,                   -EIO            }
7023 };
7024
7025 /*
7026  * Convert an NFS error code to a local one.
7027  * This one is used jointly by NFSv2 and NFSv3.
7028  */
7029 static int
7030 nfs4_stat_to_errno(int stat)
7031 {
7032         int i;
7033         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7034                 if (nfs_errtbl[i].stat == stat)
7035                         return nfs_errtbl[i].errno;
7036         }
7037         if (stat <= 10000 || stat > 10100) {
7038                 /* The server is looney tunes. */
7039                 return -EREMOTEIO;
7040         }
7041         /* If we cannot translate the error, the recovery routines should
7042          * handle it.
7043          * Note: remaining NFSv4 error codes have values > 10000, so should
7044          * not conflict with native Linux error codes.
7045          */
7046         return -stat;
7047 }
7048
7049 #define PROC(proc, argtype, restype)                            \
7050 [NFSPROC4_CLNT_##proc] = {                                      \
7051         .p_proc   = NFSPROC4_COMPOUND,                          \
7052         .p_encode = (kxdreproc_t)nfs4_xdr_##argtype,            \
7053         .p_decode = (kxdrdproc_t)nfs4_xdr_##restype,            \
7054         .p_arglen = NFS4_##argtype##_sz,                        \
7055         .p_replen = NFS4_##restype##_sz,                        \
7056         .p_statidx = NFSPROC4_CLNT_##proc,                      \
7057         .p_name   = #proc,                                      \
7058 }
7059
7060 struct rpc_procinfo     nfs4_procedures[] = {
7061         PROC(READ,              enc_read,               dec_read),
7062         PROC(WRITE,             enc_write,              dec_write),
7063         PROC(COMMIT,            enc_commit,             dec_commit),
7064         PROC(OPEN,              enc_open,               dec_open),
7065         PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
7066         PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
7067         PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
7068         PROC(CLOSE,             enc_close,              dec_close),
7069         PROC(SETATTR,           enc_setattr,            dec_setattr),
7070         PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
7071         PROC(RENEW,             enc_renew,              dec_renew),
7072         PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
7073         PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7074         PROC(LOCK,              enc_lock,               dec_lock),
7075         PROC(LOCKT,             enc_lockt,              dec_lockt),
7076         PROC(LOCKU,             enc_locku,              dec_locku),
7077         PROC(ACCESS,            enc_access,             dec_access),
7078         PROC(GETATTR,           enc_getattr,            dec_getattr),
7079         PROC(LOOKUP,            enc_lookup,             dec_lookup),
7080         PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
7081         PROC(REMOVE,            enc_remove,             dec_remove),
7082         PROC(RENAME,            enc_rename,             dec_rename),
7083         PROC(LINK,              enc_link,               dec_link),
7084         PROC(SYMLINK,           enc_symlink,            dec_symlink),
7085         PROC(CREATE,            enc_create,             dec_create),
7086         PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
7087         PROC(STATFS,            enc_statfs,             dec_statfs),
7088         PROC(READLINK,          enc_readlink,           dec_readlink),
7089         PROC(READDIR,           enc_readdir,            dec_readdir),
7090         PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
7091         PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
7092         PROC(GETACL,            enc_getacl,             dec_getacl),
7093         PROC(SETACL,            enc_setacl,             dec_setacl),
7094         PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
7095         PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
7096         PROC(SECINFO,           enc_secinfo,            dec_secinfo),
7097 #if defined(CONFIG_NFS_V4_1)
7098         PROC(EXCHANGE_ID,       enc_exchange_id,        dec_exchange_id),
7099         PROC(CREATE_SESSION,    enc_create_session,     dec_create_session),
7100         PROC(DESTROY_SESSION,   enc_destroy_session,    dec_destroy_session),
7101         PROC(SEQUENCE,          enc_sequence,           dec_sequence),
7102         PROC(GET_LEASE_TIME,    enc_get_lease_time,     dec_get_lease_time),
7103         PROC(RECLAIM_COMPLETE,  enc_reclaim_complete,   dec_reclaim_complete),
7104         PROC(GETDEVICEINFO,     enc_getdeviceinfo,      dec_getdeviceinfo),
7105         PROC(LAYOUTGET,         enc_layoutget,          dec_layoutget),
7106         PROC(LAYOUTCOMMIT,      enc_layoutcommit,       dec_layoutcommit),
7107         PROC(LAYOUTRETURN,      enc_layoutreturn,       dec_layoutreturn),
7108         PROC(SECINFO_NO_NAME,   enc_secinfo_no_name,    dec_secinfo_no_name),
7109         PROC(TEST_STATEID,      enc_test_stateid,       dec_test_stateid),
7110         PROC(FREE_STATEID,      enc_free_stateid,       dec_free_stateid),
7111         PROC(GETDEVICELIST,     enc_getdevicelist,      dec_getdevicelist),
7112 #endif /* CONFIG_NFS_V4_1 */
7113 };
7114
7115 struct rpc_version              nfs_version4 = {
7116         .number                 = 4,
7117         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
7118         .procs                  = nfs4_procedures
7119 };
7120
7121 /*
7122  * Local variables:
7123  *  c-basic-offset: 8
7124  * End:
7125  */