fs/nfs/nfs4xdr.c

   1 /*
   2  *  fs/nfs/nfs4xdr.c
   3  *
   4  *  Client-side XDR for NFSv4.
   5  *
   6  *  Copyright (c) 2002 The Regents of the University of Michigan.
   7  *  All rights reserved.
   8  *
   9  *  Kendrick Smith <kmsmith@umich.edu>
  10  *  Andy Adamson   <andros@umich.edu>
  11  *
  12  *  Redistribution and use in source and binary forms, with or without
  13  *  modification, are permitted provided that the following conditions
  14  *  are met:
  15  *
  16  *  1. Redistributions of source code must retain the above copyright
  17  *     notice, this list of conditions and the following disclaimer.
  18  *  2. Redistributions in binary form must reproduce the above copyright
  19  *     notice, this list of conditions and the following disclaimer in the
  20  *     documentation and/or other materials provided with the distribution.
  21  *  3. Neither the name of the University nor the names of its
  22  *     contributors may be used to endorse or promote products derived
  23  *     from this software without specific prior written permission.
  24  *
  25  *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  26  *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  27  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  28  *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  29  *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30  *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31  *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  32  *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  33  *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  34  *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  35  *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 #include <linux/param.h>
  39 #include <linux/time.h>
  40 #include <linux/mm.h>
  41 #include <linux/errno.h>
  42 #include <linux/string.h>
  43 #include <linux/in.h>
  44 #include <linux/pagemap.h>
  45 #include <linux/proc_fs.h>
  46 #include <linux/kdev_t.h>
  47 #include <linux/sunrpc/clnt.h>
  48 #include <linux/sunrpc/msg_prot.h>
  49 #include <linux/sunrpc/gss_api.h>
  50 #include <linux/nfs.h>
  51 #include <linux/nfs4.h>
  52 #include <linux/nfs_fs.h>
  53 #include <linux/nfs_idmap.h>
  54 #include "nfs4_fs.h"
  55 #include "internal.h"
  56 #include "pnfs.h"
  57
  58 #define NFSDBG_FACILITY         NFSDBG_XDR
  59
  60 /* Mapping from NFS error code to "errno" error code. */
  61 #define errno_NFSERR_IO         EIO
  62
  63 static int nfs4_stat_to_errno(int);
  64
  65 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
  66 #ifdef DEBUG
  67 #define NFS4_MAXTAGLEN          20
  68 #else
  69 #define NFS4_MAXTAGLEN          0
  70 #endif
  71
  72 /* lock,open owner id:
  73  * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT  >> 2)
  74  */
  75 #define open_owner_id_maxsz     (1 + 1 + 4)
  76 #define lock_owner_id_maxsz     (1 + 1 + 4)
  77 #define decode_lockowner_maxsz  (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  78 #define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  79 #define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  80 #define op_encode_hdr_maxsz     (1)
  81 #define op_decode_hdr_maxsz     (2)
  82 #define encode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  83 #define decode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  84 #define encode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  85 #define decode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  86 #define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
  87                                 (NFS4_FHSIZE >> 2))
  88 #define decode_putfh_maxsz      (op_decode_hdr_maxsz)
  89 #define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
  90 #define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
  91 #define encode_getfh_maxsz      (op_encode_hdr_maxsz)
  92 #define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
  93                                 ((3+NFS4_FHSIZE) >> 2))
  94 #define nfs4_fattr_bitmap_maxsz 4
  95 #define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
  96 #define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
  97 #define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
  98 #define nfs4_owner_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  99 #define nfs4_group_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 100 /* This is based on getfattr, which uses the most attributes: */
 101 #define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
 102                                 3 + 3 + 3 + nfs4_owner_maxsz + nfs4_group_maxsz))
 103 #define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
 104                                 nfs4_fattr_value_maxsz)
 105 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
 106 #define encode_attrs_maxsz      (nfs4_fattr_bitmap_maxsz + \
 107                                  1 + 2 + 1 + \
 108                                 nfs4_owner_maxsz + \
 109                                 nfs4_group_maxsz + \
 110                                 4 + 4)
 111 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
 112 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
 113 #define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
 114 #define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 115 #define encode_fsinfo_maxsz     (encode_getattr_maxsz)
 116 /* The 5 accounts for the PNFS attributes, and assumes that at most three
 117  * layout types will be returned.
 118  */
 119 #define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + \
 120                                  nfs4_fattr_bitmap_maxsz + 4 + 8 + 5)
 121 #define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 122 #define decode_renew_maxsz      (op_decode_hdr_maxsz)
 123 #define encode_setclientid_maxsz \
 124                                 (op_encode_hdr_maxsz + \
 125                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 126                                 XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
 127                                 1 /* sc_prog */ + \
 128                                 XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 129                                 XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
 130                                 1) /* sc_cb_ident */
 131 #define decode_setclientid_maxsz \
 132                                 (op_decode_hdr_maxsz + \
 133                                 2 + \
 134                                 1024) /* large value for CLID_INUSE */
 135 #define encode_setclientid_confirm_maxsz \
 136                                 (op_encode_hdr_maxsz + \
 137                                 3 + (NFS4_VERIFIER_SIZE >> 2))
 138 #define decode_setclientid_confirm_maxsz \
 139                                 (op_decode_hdr_maxsz)
 140 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
 141 #define decode_lookup_maxsz     (op_decode_hdr_maxsz)
 142 #define encode_share_access_maxsz \
 143                                 (2)
 144 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
 145 #define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
 146 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
 147 #define encode_open_maxsz       (op_encode_hdr_maxsz + \
 148                                 2 + encode_share_access_maxsz + 2 + \
 149                                 open_owner_id_maxsz + \
 150                                 encode_opentype_maxsz + \
 151                                 encode_claim_null_maxsz)
 152 #define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
 153 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
 154                                 decode_ace_maxsz)
 155 #define decode_change_info_maxsz        (5)
 156 #define decode_open_maxsz       (op_decode_hdr_maxsz + \
 157                                 decode_stateid_maxsz + \
 158                                 decode_change_info_maxsz + 1 + \
 159                                 nfs4_fattr_bitmap_maxsz + \
 160                                 decode_delegation_maxsz)
 161 #define encode_open_confirm_maxsz \
 162                                 (op_encode_hdr_maxsz + \
 163                                  encode_stateid_maxsz + 1)
 164 #define decode_open_confirm_maxsz \
 165                                 (op_decode_hdr_maxsz + \
 166                                  decode_stateid_maxsz)
 167 #define encode_open_downgrade_maxsz \
 168                                 (op_encode_hdr_maxsz + \
 169                                  encode_stateid_maxsz + 1 + \
 170                                  encode_share_access_maxsz)
 171 #define decode_open_downgrade_maxsz \
 172                                 (op_decode_hdr_maxsz + \
 173                                  decode_stateid_maxsz)
 174 #define encode_close_maxsz      (op_encode_hdr_maxsz + \
 175                                  1 + encode_stateid_maxsz)
 176 #define decode_close_maxsz      (op_decode_hdr_maxsz + \
 177                                  decode_stateid_maxsz)
 178 #define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
 179                                  encode_stateid_maxsz + \
 180                                  encode_attrs_maxsz)
 181 #define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
 182                                  nfs4_fattr_bitmap_maxsz)
 183 #define encode_read_maxsz       (op_encode_hdr_maxsz + \
 184                                  encode_stateid_maxsz + 3)
 185 #define decode_read_maxsz       (op_decode_hdr_maxsz + 2)
 186 #define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
 187                                  2 + encode_verifier_maxsz + 5)
 188 #define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
 189                                  decode_verifier_maxsz)
 190 #define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 191 #define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1)
 192 #define encode_write_maxsz      (op_encode_hdr_maxsz + \
 193                                  encode_stateid_maxsz + 4)
 194 #define decode_write_maxsz      (op_decode_hdr_maxsz + \
 195                                  2 + decode_verifier_maxsz)
 196 #define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
 197 #define decode_commit_maxsz     (op_decode_hdr_maxsz + \
 198                                  decode_verifier_maxsz)
 199 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 200                                 nfs4_name_maxsz)
 201 #define decode_remove_maxsz     (op_decode_hdr_maxsz + \
 202                                  decode_change_info_maxsz)
 203 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 204                                 2 * nfs4_name_maxsz)
 205 #define decode_rename_maxsz     (op_decode_hdr_maxsz + \
 206                                  decode_change_info_maxsz + \
 207                                  decode_change_info_maxsz)
 208 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 209                                 nfs4_name_maxsz)
 210 #define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
 211 #define encode_lockowner_maxsz  (7)
 212 #define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 213                                  7 + \
 214                                  1 + encode_stateid_maxsz + 1 + \
 215                                  encode_lockowner_maxsz)
 216 #define decode_lock_denied_maxsz \
 217                                 (8 + decode_lockowner_maxsz)
 218 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 219                                  decode_lock_denied_maxsz)
 220 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 5 + \
 221                                 encode_lockowner_maxsz)
 222 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 223                                  decode_lock_denied_maxsz)
 224 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 225                                  encode_stateid_maxsz + \
 226                                  4)
 227 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 228                                  decode_stateid_maxsz)
 229 #define encode_release_lockowner_maxsz \
 230                                 (op_encode_hdr_maxsz + \
 231                                  encode_lockowner_maxsz)
 232 #define decode_release_lockowner_maxsz \
 233                                 (op_decode_hdr_maxsz)
 234 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 235 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 236 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 237                                 1 + nfs4_name_maxsz + \
 238                                 1 + \
 239                                 nfs4_fattr_maxsz)
 240 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 241 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 242                                 1 + 2 + nfs4_name_maxsz + \
 243                                 encode_attrs_maxsz)
 244 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
 245                                 decode_change_info_maxsz + \
 246                                 nfs4_fattr_bitmap_maxsz)
 247 #define encode_statfs_maxsz     (encode_getattr_maxsz)
 248 #define decode_statfs_maxsz     (decode_getattr_maxsz)
 249 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 250 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 251 #define encode_getacl_maxsz     (encode_getattr_maxsz)
 252 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 253                                  nfs4_fattr_bitmap_maxsz + 1)
 254 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 255                                  encode_stateid_maxsz + 3)
 256 #define decode_setacl_maxsz     (decode_setattr_maxsz)
 257 #define encode_fs_locations_maxsz \
 258                                 (encode_getattr_maxsz)
 259 #define decode_fs_locations_maxsz \
 260                                 (0)
 261 #define encode_secinfo_maxsz    (op_encode_hdr_maxsz + nfs4_name_maxsz)
 262 #define decode_secinfo_maxsz    (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
 263
 264 #if defined(CONFIG_NFS_V4_1)
 265 #define NFS4_MAX_MACHINE_NAME_LEN (64)
 266
 267 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
 268                                 encode_verifier_maxsz + \
 269                                 1 /* co_ownerid.len */ + \
 270                                 XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
 271                                 1 /* flags */ + \
 272                                 1 /* spa_how */ + \
 273                                 0 /* SP4_NONE (for now) */ + \
 274                                 1 /* zero implemetation id array */)
 275 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
 276                                 2 /* eir_clientid */ + \
 277                                 1 /* eir_sequenceid */ + \
 278                                 1 /* eir_flags */ + \
 279                                 1 /* spr_how */ + \
 280                                 0 /* SP4_NONE (for now) */ + \
 281                                 2 /* eir_server_owner.so_minor_id */ + \
 282                                 /* eir_server_owner.so_major_id<> */ \
 283                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 284                                 /* eir_server_scope<> */ \
 285                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 286                                 1 /* eir_server_impl_id array length */ + \
 287                                 0 /* ignored eir_server_impl_id contents */)
 288 #define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
 289 #define decode_channel_attrs_maxsz  (6 + \
 290                                      1 /* ca_rdma_ird.len */ + \
 291                                      1 /* ca_rdma_ird */)
 292 #define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
 293                                      2 /* csa_clientid */ + \
 294                                      1 /* csa_sequence */ + \
 295                                      1 /* csa_flags */ + \
 296                                      encode_channel_attrs_maxsz + \
 297                                      encode_channel_attrs_maxsz + \
 298                                      1 /* csa_cb_program */ + \
 299                                      1 /* csa_sec_parms.len (1) */ + \
 300                                      1 /* cb_secflavor (AUTH_SYS) */ + \
 301                                      1 /* stamp */ + \
 302                                      1 /* machinename.len */ + \
 303                                      XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
 304                                      1 /* uid */ + \
 305                                      1 /* gid */ + \
 306                                      1 /* gids.len (0) */)
 307 #define decode_create_session_maxsz  (op_decode_hdr_maxsz +     \
 308                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 309                                      1 /* csr_sequence */ + \
 310                                      1 /* csr_flags */ + \
 311                                      decode_channel_attrs_maxsz + \
 312                                      decode_channel_attrs_maxsz)
 313 #define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
 314 #define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
 315 #define encode_sequence_maxsz   (op_encode_hdr_maxsz + \
 316                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
 317 #define decode_sequence_maxsz   (op_decode_hdr_maxsz + \
 318                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
 319 #define encode_reclaim_complete_maxsz   (op_encode_hdr_maxsz + 4)
 320 #define decode_reclaim_complete_maxsz   (op_decode_hdr_maxsz + 4)
 321 #define encode_getdevicelist_maxsz (op_encode_hdr_maxsz + 4 + \
 322                                 encode_verifier_maxsz)
 323 #define decode_getdevicelist_maxsz (op_decode_hdr_maxsz + \
 324                                 2 /* nfs_cookie4 gdlr_cookie */ + \
 325                                 decode_verifier_maxsz \
 326                                   /* verifier4 gdlr_verifier */ + \
 327                                 1 /* gdlr_deviceid_list count */ + \
 328                                 XDR_QUADLEN(NFS4_PNFS_GETDEVLIST_MAXNUM * \
 329                                             NFS4_DEVICEID4_SIZE) \
 330                                   /* gdlr_deviceid_list */ + \
 331                                 1 /* bool gdlr_eof */)
 332 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + 4 + \
 333                                 XDR_QUADLEN(NFS4_DEVICEID4_SIZE))
 334 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
 335                                 1 /* layout type */ + \
 336                                 1 /* opaque devaddr4 length */ + \
 337                                   /* devaddr4 payload is read into page */ \
 338                                 1 /* notification bitmap length */ + \
 339                                 1 /* notification bitmap */)
 340 #define encode_layoutget_maxsz  (op_encode_hdr_maxsz + 10 + \
 341                                 encode_stateid_maxsz)
 342 #define decode_layoutget_maxsz  (op_decode_hdr_maxsz + 8 + \
 343                                 decode_stateid_maxsz + \
 344                                 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
 345 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz +          \
 346                                 2 /* offset */ + \
 347                                 2 /* length */ + \
 348                                 1 /* reclaim */ + \
 349                                 encode_stateid_maxsz + \
 350                                 1 /* new offset (true) */ + \
 351                                 2 /* last byte written */ + \
 352                                 1 /* nt_timechanged (false) */ + \
 353                                 1 /* layoutupdate4 layout type */ + \
 354                                 1 /* NULL filelayout layoutupdate4 payload */)
 355 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
 356 #define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
 357                                 encode_stateid_maxsz + \
 358                                 1 /* FIXME: opaque lrf_body always empty at the moment */)
 359 #define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
 360                                 1 + decode_stateid_maxsz)
 361 #define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
 362 #define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
 363 #define encode_test_stateid_maxsz       (op_encode_hdr_maxsz + 2 + \
 364                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 365 #define decode_test_stateid_maxsz       (op_decode_hdr_maxsz + 2 + 1)
 366 #define encode_free_stateid_maxsz       (op_encode_hdr_maxsz + 1 + \
 367                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 368 #define decode_free_stateid_maxsz       (op_decode_hdr_maxsz + 1)
 369 #else /* CONFIG_NFS_V4_1 */
 370 #define encode_sequence_maxsz   0
 371 #define decode_sequence_maxsz   0
 372 #endif /* CONFIG_NFS_V4_1 */
 373
 374 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 375 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 376 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 377                                 encode_sequence_maxsz + \
 378                                 encode_putfh_maxsz + \
 379                                 encode_read_maxsz)
 380 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 381                                 decode_sequence_maxsz + \
 382                                 decode_putfh_maxsz + \
 383                                 decode_read_maxsz)
 384 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 385                                 encode_sequence_maxsz + \
 386                                 encode_putfh_maxsz + \
 387                                 encode_readlink_maxsz)
 388 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 389                                 decode_sequence_maxsz + \
 390                                 decode_putfh_maxsz + \
 391                                 decode_readlink_maxsz)
 392 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 393                                 encode_sequence_maxsz + \
 394                                 encode_putfh_maxsz + \
 395                                 encode_readdir_maxsz)
 396 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 397                                 decode_sequence_maxsz + \
 398                                 decode_putfh_maxsz + \
 399                                 decode_readdir_maxsz)
 400 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 401                                 encode_sequence_maxsz + \
 402                                 encode_putfh_maxsz + \
 403                                 encode_write_maxsz + \
 404                                 encode_getattr_maxsz)
 405 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 406                                 decode_sequence_maxsz + \
 407                                 decode_putfh_maxsz + \
 408                                 decode_write_maxsz + \
 409                                 decode_getattr_maxsz)
 410 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 411                                 encode_sequence_maxsz + \
 412                                 encode_putfh_maxsz + \
 413                                 encode_commit_maxsz + \
 414                                 encode_getattr_maxsz)
 415 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 416                                 decode_sequence_maxsz + \
 417                                 decode_putfh_maxsz + \
 418                                 decode_commit_maxsz + \
 419                                 decode_getattr_maxsz)
 420 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 421                                 encode_sequence_maxsz + \
 422                                 encode_putfh_maxsz + \
 423                                 encode_savefh_maxsz + \
 424                                 encode_open_maxsz + \
 425                                 encode_getfh_maxsz + \
 426                                 encode_getattr_maxsz + \
 427                                 encode_restorefh_maxsz + \
 428                                 encode_getattr_maxsz)
 429 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 430                                 decode_sequence_maxsz + \
 431                                 decode_putfh_maxsz + \
 432                                 decode_savefh_maxsz + \
 433                                 decode_open_maxsz + \
 434                                 decode_getfh_maxsz + \
 435                                 decode_getattr_maxsz + \
 436                                 decode_restorefh_maxsz + \
 437                                 decode_getattr_maxsz)
 438 #define NFS4_enc_open_confirm_sz \
 439                                 (compound_encode_hdr_maxsz + \
 440                                  encode_putfh_maxsz + \
 441                                  encode_open_confirm_maxsz)
 442 #define NFS4_dec_open_confirm_sz \
 443                                 (compound_decode_hdr_maxsz + \
 444                                  decode_putfh_maxsz + \
 445                                  decode_open_confirm_maxsz)
 446 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 447                                         encode_sequence_maxsz + \
 448                                         encode_putfh_maxsz + \
 449                                         encode_open_maxsz + \
 450                                         encode_getattr_maxsz)
 451 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 452                                         decode_sequence_maxsz + \
 453                                         decode_putfh_maxsz + \
 454                                         decode_open_maxsz + \
 455                                         decode_getattr_maxsz)
 456 #define NFS4_enc_open_downgrade_sz \
 457                                 (compound_encode_hdr_maxsz + \
 458                                  encode_sequence_maxsz + \
 459                                  encode_putfh_maxsz + \
 460                                  encode_open_downgrade_maxsz + \
 461                                  encode_getattr_maxsz)
 462 #define NFS4_dec_open_downgrade_sz \
 463                                 (compound_decode_hdr_maxsz + \
 464                                  decode_sequence_maxsz + \
 465                                  decode_putfh_maxsz + \
 466                                  decode_open_downgrade_maxsz + \
 467                                  decode_getattr_maxsz)
 468 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 469                                  encode_sequence_maxsz + \
 470                                  encode_putfh_maxsz + \
 471                                  encode_close_maxsz + \
 472                                  encode_getattr_maxsz)
 473 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 474                                  decode_sequence_maxsz + \
 475                                  decode_putfh_maxsz + \
 476                                  decode_close_maxsz + \
 477                                  decode_getattr_maxsz)
 478 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 479                                  encode_sequence_maxsz + \
 480                                  encode_putfh_maxsz + \
 481                                  encode_setattr_maxsz + \
 482                                  encode_getattr_maxsz)
 483 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 484                                  decode_sequence_maxsz + \
 485                                  decode_putfh_maxsz + \
 486                                  decode_setattr_maxsz + \
 487                                  decode_getattr_maxsz)
 488 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 489                                 encode_sequence_maxsz + \
 490                                 encode_putfh_maxsz + \
 491                                 encode_fsinfo_maxsz)
 492 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 493                                 decode_sequence_maxsz + \
 494                                 decode_putfh_maxsz + \
 495                                 decode_fsinfo_maxsz)
 496 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 497                                 encode_renew_maxsz)
 498 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 499                                 decode_renew_maxsz)
 500 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 501                                 encode_setclientid_maxsz)
 502 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 503                                 decode_setclientid_maxsz)
 504 #define NFS4_enc_setclientid_confirm_sz \
 505                                 (compound_encode_hdr_maxsz + \
 506                                 encode_setclientid_confirm_maxsz + \
 507                                 encode_putrootfh_maxsz + \
 508                                 encode_fsinfo_maxsz)
 509 #define NFS4_dec_setclientid_confirm_sz \
 510                                 (compound_decode_hdr_maxsz + \
 511                                 decode_setclientid_confirm_maxsz + \
 512                                 decode_putrootfh_maxsz + \
 513                                 decode_fsinfo_maxsz)
 514 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 515                                 encode_sequence_maxsz + \
 516                                 encode_putfh_maxsz + \
 517                                 encode_lock_maxsz)
 518 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 519                                 decode_sequence_maxsz + \
 520                                 decode_putfh_maxsz + \
 521                                 decode_lock_maxsz)
 522 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 523                                 encode_sequence_maxsz + \
 524                                 encode_putfh_maxsz + \
 525                                 encode_lockt_maxsz)
 526 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 527                                  decode_sequence_maxsz + \
 528                                  decode_putfh_maxsz + \
 529                                  decode_lockt_maxsz)
 530 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 531                                 encode_sequence_maxsz + \
 532                                 encode_putfh_maxsz + \
 533                                 encode_locku_maxsz)
 534 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 535                                 decode_sequence_maxsz + \
 536                                 decode_putfh_maxsz + \
 537                                 decode_locku_maxsz)
 538 #define NFS4_enc_release_lockowner_sz \
 539                                 (compound_encode_hdr_maxsz + \
 540                                  encode_lockowner_maxsz)
 541 #define NFS4_dec_release_lockowner_sz \
 542                                 (compound_decode_hdr_maxsz + \
 543                                  decode_lockowner_maxsz)
 544 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 545                                 encode_sequence_maxsz + \
 546                                 encode_putfh_maxsz + \
 547                                 encode_access_maxsz + \
 548                                 encode_getattr_maxsz)
 549 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 550                                 decode_sequence_maxsz + \
 551                                 decode_putfh_maxsz + \
 552                                 decode_access_maxsz + \
 553                                 decode_getattr_maxsz)
 554 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 555                                 encode_sequence_maxsz + \
 556                                 encode_putfh_maxsz + \
 557                                 encode_getattr_maxsz)
 558 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 559                                 decode_sequence_maxsz + \
 560                                 decode_putfh_maxsz + \
 561                                 decode_getattr_maxsz)
 562 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 563                                 encode_sequence_maxsz + \
 564                                 encode_putfh_maxsz + \
 565                                 encode_lookup_maxsz + \
 566                                 encode_getattr_maxsz + \
 567                                 encode_getfh_maxsz)
 568 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 569                                 decode_sequence_maxsz + \
 570                                 decode_putfh_maxsz + \
 571                                 decode_lookup_maxsz + \
 572                                 decode_getattr_maxsz + \
 573                                 decode_getfh_maxsz)
 574 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 575                                 encode_sequence_maxsz + \
 576                                 encode_putrootfh_maxsz + \
 577                                 encode_getattr_maxsz + \
 578                                 encode_getfh_maxsz)
 579 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 580                                 decode_sequence_maxsz + \
 581                                 decode_putrootfh_maxsz + \
 582                                 decode_getattr_maxsz + \
 583                                 decode_getfh_maxsz)
 584 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 585                                 encode_sequence_maxsz + \
 586                                 encode_putfh_maxsz + \
 587                                 encode_remove_maxsz + \
 588                                 encode_getattr_maxsz)
 589 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 590                                 decode_sequence_maxsz + \
 591                                 decode_putfh_maxsz + \
 592                                 decode_remove_maxsz + \
 593                                 decode_getattr_maxsz)
 594 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 595                                 encode_sequence_maxsz + \
 596                                 encode_putfh_maxsz + \
 597                                 encode_savefh_maxsz + \
 598                                 encode_putfh_maxsz + \
 599                                 encode_rename_maxsz + \
 600                                 encode_getattr_maxsz + \
 601                                 encode_restorefh_maxsz + \
 602                                 encode_getattr_maxsz)
 603 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 604                                 decode_sequence_maxsz + \
 605                                 decode_putfh_maxsz + \
 606                                 decode_savefh_maxsz + \
 607                                 decode_putfh_maxsz + \
 608                                 decode_rename_maxsz + \
 609                                 decode_getattr_maxsz + \
 610                                 decode_restorefh_maxsz + \
 611                                 decode_getattr_maxsz)
 612 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 613                                 encode_sequence_maxsz + \
 614                                 encode_putfh_maxsz + \
 615                                 encode_savefh_maxsz + \
 616                                 encode_putfh_maxsz + \
 617                                 encode_link_maxsz + \
 618                                 decode_getattr_maxsz + \
 619                                 encode_restorefh_maxsz + \
 620                                 decode_getattr_maxsz)
 621 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 622                                 decode_sequence_maxsz + \
 623                                 decode_putfh_maxsz + \
 624                                 decode_savefh_maxsz + \
 625                                 decode_putfh_maxsz + \
 626                                 decode_link_maxsz + \
 627                                 decode_getattr_maxsz + \
 628                                 decode_restorefh_maxsz + \
 629                                 decode_getattr_maxsz)
 630 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 631                                 encode_sequence_maxsz + \
 632                                 encode_putfh_maxsz + \
 633                                 encode_symlink_maxsz + \
 634                                 encode_getattr_maxsz + \
 635                                 encode_getfh_maxsz)
 636 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 637                                 decode_sequence_maxsz + \
 638                                 decode_putfh_maxsz + \
 639                                 decode_symlink_maxsz + \
 640                                 decode_getattr_maxsz + \
 641                                 decode_getfh_maxsz)
 642 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 643                                 encode_sequence_maxsz + \
 644                                 encode_putfh_maxsz + \
 645                                 encode_savefh_maxsz + \
 646                                 encode_create_maxsz + \
 647                                 encode_getfh_maxsz + \
 648                                 encode_getattr_maxsz + \
 649                                 encode_restorefh_maxsz + \
 650                                 encode_getattr_maxsz)
 651 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 652                                 decode_sequence_maxsz + \
 653                                 decode_putfh_maxsz + \
 654                                 decode_savefh_maxsz + \
 655                                 decode_create_maxsz + \
 656                                 decode_getfh_maxsz + \
 657                                 decode_getattr_maxsz + \
 658                                 decode_restorefh_maxsz + \
 659                                 decode_getattr_maxsz)
 660 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 661                                 encode_sequence_maxsz + \
 662                                 encode_putfh_maxsz + \
 663                                 encode_getattr_maxsz)
 664 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 665                                 decode_sequence_maxsz + \
 666                                 decode_putfh_maxsz + \
 667                                 decode_getattr_maxsz)
 668 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 669                                 encode_sequence_maxsz + \
 670                                 encode_putfh_maxsz + \
 671                                 encode_statfs_maxsz)
 672 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 673                                 decode_sequence_maxsz + \
 674                                 decode_putfh_maxsz + \
 675                                 decode_statfs_maxsz)
 676 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 677                                 encode_sequence_maxsz + \
 678                                 encode_putfh_maxsz + \
 679                                 encode_getattr_maxsz)
 680 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 681                                 decode_sequence_maxsz + \
 682                                 decode_putfh_maxsz + \
 683                                 decode_getattr_maxsz)
 684 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 685                                 encode_sequence_maxsz + \
 686                                 encode_putfh_maxsz + \
 687                                 encode_delegreturn_maxsz + \
 688                                 encode_getattr_maxsz)
 689 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 690                                 decode_sequence_maxsz + \
 691                                 decode_delegreturn_maxsz + \
 692                                 decode_getattr_maxsz)
 693 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 694                                 encode_sequence_maxsz + \
 695                                 encode_putfh_maxsz + \
 696                                 encode_getacl_maxsz)
 697 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 698                                 decode_sequence_maxsz + \
 699                                 decode_putfh_maxsz + \
 700                                 decode_getacl_maxsz)
 701 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 702                                 encode_sequence_maxsz + \
 703                                 encode_putfh_maxsz + \
 704                                 encode_setacl_maxsz)
 705 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 706                                 decode_sequence_maxsz + \
 707                                 decode_putfh_maxsz + \
 708                                 decode_setacl_maxsz)
 709 #define NFS4_enc_fs_locations_sz \
 710                                 (compound_encode_hdr_maxsz + \
 711                                  encode_sequence_maxsz + \
 712                                  encode_putfh_maxsz + \
 713                                  encode_lookup_maxsz + \
 714                                  encode_fs_locations_maxsz)
 715 #define NFS4_dec_fs_locations_sz \
 716                                 (compound_decode_hdr_maxsz + \
 717                                  decode_sequence_maxsz + \
 718                                  decode_putfh_maxsz + \
 719                                  decode_lookup_maxsz + \
 720                                  decode_fs_locations_maxsz)
 721 #define NFS4_enc_secinfo_sz     (compound_encode_hdr_maxsz + \
 722                                 encode_sequence_maxsz + \
 723                                 encode_putfh_maxsz + \
 724                                 encode_secinfo_maxsz)
 725 #define NFS4_dec_secinfo_sz     (compound_decode_hdr_maxsz + \
 726                                 decode_sequence_maxsz + \
 727                                 decode_putfh_maxsz + \
 728                                 decode_secinfo_maxsz)
 729 #if defined(CONFIG_NFS_V4_1)
 730 #define NFS4_enc_exchange_id_sz \
 731                                 (compound_encode_hdr_maxsz + \
 732                                  encode_exchange_id_maxsz)
 733 #define NFS4_dec_exchange_id_sz \
 734                                 (compound_decode_hdr_maxsz + \
 735                                  decode_exchange_id_maxsz)
 736 #define NFS4_enc_create_session_sz \
 737                                 (compound_encode_hdr_maxsz + \
 738                                  encode_create_session_maxsz)
 739 #define NFS4_dec_create_session_sz \
 740                                 (compound_decode_hdr_maxsz + \
 741                                  decode_create_session_maxsz)
 742 #define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
 743                                          encode_destroy_session_maxsz)
 744 #define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
 745                                          decode_destroy_session_maxsz)
 746 #define NFS4_enc_sequence_sz \
 747                                 (compound_decode_hdr_maxsz + \
 748                                  encode_sequence_maxsz)
 749 #define NFS4_dec_sequence_sz \
 750                                 (compound_decode_hdr_maxsz + \
 751                                  decode_sequence_maxsz)
 752 #define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
 753                                          encode_sequence_maxsz + \
 754                                          encode_putrootfh_maxsz + \
 755                                          encode_fsinfo_maxsz)
 756 #define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
 757                                          decode_sequence_maxsz + \
 758                                          decode_putrootfh_maxsz + \
 759                                          decode_fsinfo_maxsz)
 760 #define NFS4_enc_reclaim_complete_sz    (compound_encode_hdr_maxsz + \
 761                                          encode_sequence_maxsz + \
 762                                          encode_reclaim_complete_maxsz)
 763 #define NFS4_dec_reclaim_complete_sz    (compound_decode_hdr_maxsz + \
 764                                          decode_sequence_maxsz + \
 765                                          decode_reclaim_complete_maxsz)
 766 #define NFS4_enc_getdevicelist_sz (compound_encode_hdr_maxsz + \
 767                                 encode_sequence_maxsz + \
 768                                 encode_putfh_maxsz + \
 769                                 encode_getdevicelist_maxsz)
 770 #define NFS4_dec_getdevicelist_sz (compound_decode_hdr_maxsz + \
 771                                 decode_sequence_maxsz + \
 772                                 decode_putfh_maxsz + \
 773                                 decode_getdevicelist_maxsz)
 774 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
 775                                 encode_sequence_maxsz +\
 776                                 encode_getdeviceinfo_maxsz)
 777 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
 778                                 decode_sequence_maxsz + \
 779                                 decode_getdeviceinfo_maxsz)
 780 #define NFS4_enc_layoutget_sz   (compound_encode_hdr_maxsz + \
 781                                 encode_sequence_maxsz + \
 782                                 encode_putfh_maxsz +        \
 783                                 encode_layoutget_maxsz)
 784 #define NFS4_dec_layoutget_sz   (compound_decode_hdr_maxsz + \
 785                                 decode_sequence_maxsz + \
 786                                 decode_putfh_maxsz +        \
 787                                 decode_layoutget_maxsz)
 788 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
 789                                 encode_sequence_maxsz +\
 790                                 encode_putfh_maxsz + \
 791                                 encode_layoutcommit_maxsz + \
 792                                 encode_getattr_maxsz)
 793 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
 794                                 decode_sequence_maxsz + \
 795                                 decode_putfh_maxsz + \
 796                                 decode_layoutcommit_maxsz + \
 797                                 decode_getattr_maxsz)
 798 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
 799                                 encode_sequence_maxsz + \
 800                                 encode_putfh_maxsz + \
 801                                 encode_layoutreturn_maxsz)
 802 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
 803                                 decode_sequence_maxsz + \
 804                                 decode_putfh_maxsz + \
 805                                 decode_layoutreturn_maxsz)
 806 #define NFS4_enc_secinfo_no_name_sz     (compound_encode_hdr_maxsz + \
 807                                         encode_sequence_maxsz + \
 808                                         encode_putrootfh_maxsz +\
 809                                         encode_secinfo_no_name_maxsz)
 810 #define NFS4_dec_secinfo_no_name_sz     (compound_decode_hdr_maxsz + \
 811                                         decode_sequence_maxsz + \
 812                                         decode_putrootfh_maxsz + \
 813                                         decode_secinfo_no_name_maxsz)
 814 #define NFS4_enc_test_stateid_sz        (compound_encode_hdr_maxsz + \
 815                                          encode_sequence_maxsz + \
 816                                          encode_test_stateid_maxsz)
 817 #define NFS4_dec_test_stateid_sz        (compound_decode_hdr_maxsz + \
 818                                          decode_sequence_maxsz + \
 819                                          decode_test_stateid_maxsz)
 820 #define NFS4_enc_free_stateid_sz        (compound_encode_hdr_maxsz + \
 821                                          encode_sequence_maxsz + \
 822                                          encode_free_stateid_maxsz)
 823 #define NFS4_dec_free_stateid_sz        (compound_decode_hdr_maxsz + \
 824                                          decode_sequence_maxsz + \
 825                                          decode_free_stateid_maxsz)
 826
 827 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 828                                       compound_encode_hdr_maxsz +
 829                                       encode_sequence_maxsz +
 830                                       encode_putfh_maxsz +
 831                                       encode_getattr_maxsz) *
 832                                      XDR_UNIT);
 833
 834 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 835                                      compound_decode_hdr_maxsz +
 836                                      decode_sequence_maxsz +
 837                                      decode_putfh_maxsz) *
 838                                     XDR_UNIT);
 839 #endif /* CONFIG_NFS_V4_1 */
 840
 841 static const umode_t nfs_type2fmt[] = {
 842         [NF4BAD] = 0,
 843         [NF4REG] = S_IFREG,
 844         [NF4DIR] = S_IFDIR,
 845         [NF4BLK] = S_IFBLK,
 846         [NF4CHR] = S_IFCHR,
 847         [NF4LNK] = S_IFLNK,
 848         [NF4SOCK] = S_IFSOCK,
 849         [NF4FIFO] = S_IFIFO,
 850         [NF4ATTRDIR] = 0,
 851         [NF4NAMEDATTR] = 0,
 852 };
 853
 854 struct compound_hdr {
 855         int32_t         status;
 856         uint32_t        nops;
 857         __be32 *        nops_p;
 858         uint32_t        taglen;
 859         char *          tag;
 860         uint32_t        replen;         /* expected reply words */
 861         u32             minorversion;
 862 };
 863
 864 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
 865 {
 866         __be32 *p = xdr_reserve_space(xdr, nbytes);
 867         BUG_ON(!p);
 868         return p;
 869 }
 870
 871 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 872 {
 873         __be32 *p;
 874
 875         p = xdr_reserve_space(xdr, 4 + len);
 876         BUG_ON(p == NULL);
 877         xdr_encode_opaque(p, str, len);
 878 }
 879
 880 static void encode_compound_hdr(struct xdr_stream *xdr,
 881                                 struct rpc_rqst *req,
 882                                 struct compound_hdr *hdr)
 883 {
 884         __be32 *p;
 885         struct rpc_auth *auth = req->rq_cred->cr_auth;
 886
 887         /* initialize running count of expected bytes in reply.
 888          * NOTE: the replied tag SHOULD be the same is the one sent,
 889          * but this is not required as a MUST for the server to do so. */
 890         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
 891
 892         dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
 893         BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
 894         p = reserve_space(xdr, 4 + hdr->taglen + 8);
 895         p = xdr_encode_opaque(p, hdr->tag, hdr->taglen);
 896         *p++ = cpu_to_be32(hdr->minorversion);
 897         hdr->nops_p = p;
 898         *p = cpu_to_be32(hdr->nops);
 899 }
 900
 901 static void encode_nops(struct compound_hdr *hdr)
 902 {
 903         BUG_ON(hdr->nops > NFS4_MAX_OPS);
 904         *hdr->nops_p = htonl(hdr->nops);
 905 }
 906
 907 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 908 {
 909         __be32 *p;
 910
 911         p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
 912         BUG_ON(p == NULL);
 913         xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
 914 }
 915
 916 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
 917 {
 918         char owner_name[IDMAP_NAMESZ];
 919         char owner_group[IDMAP_NAMESZ];
 920         int owner_namelen = 0;
 921         int owner_grouplen = 0;
 922         __be32 *p;
 923         __be32 *q;
 924         int len;
 925         uint32_t bmval0 = 0;
 926         uint32_t bmval1 = 0;
 927
 928         /*
 929          * We reserve enough space to write the entire attribute buffer at once.
 930          * In the worst-case, this would be
 931          *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
 932          *          = 36 bytes, plus any contribution from variable-length fields
 933          *            such as owner/group.
 934          */
 935         len = 16;
 936
 937         /* Sigh */
 938         if (iap->ia_valid & ATTR_SIZE)
 939                 len += 8;
 940         if (iap->ia_valid & ATTR_MODE)
 941                 len += 4;
 942         if (iap->ia_valid & ATTR_UID) {
 943                 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
 944                 if (owner_namelen < 0) {
 945                         dprintk("nfs: couldn't resolve uid %d to string\n",
 946                                         iap->ia_uid);
 947                         /* XXX */
 948                         strcpy(owner_name, "nobody");
 949                         owner_namelen = sizeof("nobody") - 1;
 950                         /* goto out; */
 951                 }
 952                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
 953         }
 954         if (iap->ia_valid & ATTR_GID) {
 955                 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
 956                 if (owner_grouplen < 0) {
 957                         dprintk("nfs: couldn't resolve gid %d to string\n",
 958                                         iap->ia_gid);
 959                         strcpy(owner_group, "nobody");
 960                         owner_grouplen = sizeof("nobody") - 1;
 961                         /* goto out; */
 962                 }
 963                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
 964         }
 965         if (iap->ia_valid & ATTR_ATIME_SET)
 966                 len += 16;
 967         else if (iap->ia_valid & ATTR_ATIME)
 968                 len += 4;
 969         if (iap->ia_valid & ATTR_MTIME_SET)
 970                 len += 16;
 971         else if (iap->ia_valid & ATTR_MTIME)
 972                 len += 4;
 973         p = reserve_space(xdr, len);
 974
 975         /*
 976          * We write the bitmap length now, but leave the bitmap and the attribute
 977          * buffer length to be backfilled at the end of this routine.
 978          */
 979         *p++ = cpu_to_be32(2);
 980         q = p;
 981         p += 3;
 982
 983         if (iap->ia_valid & ATTR_SIZE) {
 984                 bmval0 |= FATTR4_WORD0_SIZE;
 985                 p = xdr_encode_hyper(p, iap->ia_size);
 986         }
 987         if (iap->ia_valid & ATTR_MODE) {
 988                 bmval1 |= FATTR4_WORD1_MODE;
 989                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
 990         }
 991         if (iap->ia_valid & ATTR_UID) {
 992                 bmval1 |= FATTR4_WORD1_OWNER;
 993                 p = xdr_encode_opaque(p, owner_name, owner_namelen);
 994         }
 995         if (iap->ia_valid & ATTR_GID) {
 996                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
 997                 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
 998         }
 999         if (iap->ia_valid & ATTR_ATIME_SET) {
1000                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
1001                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1002                 *p++ = cpu_to_be32(0);
1003                 *p++ = cpu_to_be32(iap->ia_atime.tv_sec);
1004                 *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
1005         }
1006         else if (iap->ia_valid & ATTR_ATIME) {
1007                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
1008                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1009         }
1010         if (iap->ia_valid & ATTR_MTIME_SET) {
1011                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
1012                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1013                 *p++ = cpu_to_be32(0);
1014                 *p++ = cpu_to_be32(iap->ia_mtime.tv_sec);
1015                 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1016         }
1017         else if (iap->ia_valid & ATTR_MTIME) {
1018                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
1019                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1020         }
1021
1022         /*
1023          * Now we backfill the bitmap and the attribute buffer length.
1024          */
1025         if (len != ((char *)p - (char *)q) + 4) {
1026                 printk(KERN_ERR "nfs: Attr length error, %u != %Zu\n",
1027                                 len, ((char *)p - (char *)q) + 4);
1028                 BUG();
1029         }
1030         len = (char *)p - (char *)q - 12;
1031         *q++ = htonl(bmval0);
1032         *q++ = htonl(bmval1);
1033         *q = htonl(len);
1034
1035 /* out: */
1036 }
1037
1038 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1039 {
1040         __be32 *p;
1041
1042         p = reserve_space(xdr, 8);
1043         *p++ = cpu_to_be32(OP_ACCESS);
1044         *p = cpu_to_be32(access);
1045         hdr->nops++;
1046         hdr->replen += decode_access_maxsz;
1047 }
1048
1049 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1050 {
1051         __be32 *p;
1052
1053         p = reserve_space(xdr, 8+NFS4_STATEID_SIZE);
1054         *p++ = cpu_to_be32(OP_CLOSE);
1055         *p++ = cpu_to_be32(arg->seqid->sequence->counter);
1056         xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1057         hdr->nops++;
1058         hdr->replen += decode_close_maxsz;
1059 }
1060
1061 static void encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1062 {
1063         __be32 *p;
1064
1065         p = reserve_space(xdr, 16);
1066         *p++ = cpu_to_be32(OP_COMMIT);
1067         p = xdr_encode_hyper(p, args->offset);
1068         *p = cpu_to_be32(args->count);
1069         hdr->nops++;
1070         hdr->replen += decode_commit_maxsz;
1071 }
1072
1073 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1074 {
1075         __be32 *p;
1076
1077         p = reserve_space(xdr, 8);
1078         *p++ = cpu_to_be32(OP_CREATE);
1079         *p = cpu_to_be32(create->ftype);
1080
1081         switch (create->ftype) {
1082         case NF4LNK:
1083                 p = reserve_space(xdr, 4);
1084                 *p = cpu_to_be32(create->u.symlink.len);
1085                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
1086                 break;
1087
1088         case NF4BLK: case NF4CHR:
1089                 p = reserve_space(xdr, 8);
1090                 *p++ = cpu_to_be32(create->u.device.specdata1);
1091                 *p = cpu_to_be32(create->u.device.specdata2);
1092                 break;
1093
1094         default:
1095                 break;
1096         }
1097
1098         encode_string(xdr, create->name->len, create->name->name);
1099         hdr->nops++;
1100         hdr->replen += decode_create_maxsz;
1101
1102         encode_attrs(xdr, create->attrs, create->server);
1103 }
1104
1105 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1106 {
1107         __be32 *p;
1108
1109         p = reserve_space(xdr, 12);
1110         *p++ = cpu_to_be32(OP_GETATTR);
1111         *p++ = cpu_to_be32(1);
1112         *p = cpu_to_be32(bitmap);
1113         hdr->nops++;
1114         hdr->replen += decode_getattr_maxsz;
1115 }
1116
1117 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1118 {
1119         __be32 *p;
1120
1121         p = reserve_space(xdr, 16);
1122         *p++ = cpu_to_be32(OP_GETATTR);
1123         *p++ = cpu_to_be32(2);
1124         *p++ = cpu_to_be32(bm0);
1125         *p = cpu_to_be32(bm1);
1126         hdr->nops++;
1127         hdr->replen += decode_getattr_maxsz;
1128 }
1129
1130 static void
1131 encode_getattr_three(struct xdr_stream *xdr,
1132                      uint32_t bm0, uint32_t bm1, uint32_t bm2,
1133                      struct compound_hdr *hdr)
1134 {
1135         __be32 *p;
1136
1137         p = reserve_space(xdr, 4);
1138         *p = cpu_to_be32(OP_GETATTR);
1139         if (bm2) {
1140                 p = reserve_space(xdr, 16);
1141                 *p++ = cpu_to_be32(3);
1142                 *p++ = cpu_to_be32(bm0);
1143                 *p++ = cpu_to_be32(bm1);
1144                 *p = cpu_to_be32(bm2);
1145         } else if (bm1) {
1146                 p = reserve_space(xdr, 12);
1147                 *p++ = cpu_to_be32(2);
1148                 *p++ = cpu_to_be32(bm0);
1149                 *p = cpu_to_be32(bm1);
1150         } else {
1151                 p = reserve_space(xdr, 8);
1152                 *p++ = cpu_to_be32(1);
1153                 *p = cpu_to_be32(bm0);
1154         }
1155         hdr->nops++;
1156         hdr->replen += decode_getattr_maxsz;
1157 }
1158
1159 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1160 {
1161         encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1162                            bitmask[1] & nfs4_fattr_bitmap[1], hdr);
1163 }
1164
1165 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1166 {
1167         encode_getattr_three(xdr,
1168                              bitmask[0] & nfs4_fsinfo_bitmap[0],
1169                              bitmask[1] & nfs4_fsinfo_bitmap[1],
1170                              bitmask[2] & nfs4_fsinfo_bitmap[2],
1171                              hdr);
1172 }
1173
1174 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1175 {
1176         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1177                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1178 }
1179
1180 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1181 {
1182         __be32 *p;
1183
1184         p = reserve_space(xdr, 4);
1185         *p = cpu_to_be32(OP_GETFH);
1186         hdr->nops++;
1187         hdr->replen += decode_getfh_maxsz;
1188 }
1189
1190 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1191 {
1192         __be32 *p;
1193
1194         p = reserve_space(xdr, 8 + name->len);
1195         *p++ = cpu_to_be32(OP_LINK);
1196         xdr_encode_opaque(p, name->name, name->len);
1197         hdr->nops++;
1198         hdr->replen += decode_link_maxsz;
1199 }
1200
1201 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1202 {
1203         if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
1204                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1205         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1206 }
1207
1208 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1209 {
1210         if (fl->fl_end == OFFSET_MAX)
1211                 return ~(uint64_t)0;
1212         return fl->fl_end - fl->fl_start + 1;
1213 }
1214
1215 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1216 {
1217         __be32 *p;
1218
1219         p = reserve_space(xdr, 32);
1220         p = xdr_encode_hyper(p, lowner->clientid);
1221         *p++ = cpu_to_be32(20);
1222         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1223         *p++ = cpu_to_be32(lowner->s_dev);
1224         xdr_encode_hyper(p, lowner->id);
1225 }
1226
1227 /*
1228  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1229  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1230  */
1231 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1232 {
1233         __be32 *p;
1234
1235         p = reserve_space(xdr, 32);
1236         *p++ = cpu_to_be32(OP_LOCK);
1237         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1238         *p++ = cpu_to_be32(args->reclaim);
1239         p = xdr_encode_hyper(p, args->fl->fl_start);
1240         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1241         *p = cpu_to_be32(args->new_lock_owner);
1242         if (args->new_lock_owner){
1243                 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1244                 *p++ = cpu_to_be32(args->open_seqid->sequence->counter);
1245                 p = xdr_encode_opaque_fixed(p, args->open_stateid->data, NFS4_STATEID_SIZE);
1246                 *p++ = cpu_to_be32(args->lock_seqid->sequence->counter);
1247                 encode_lockowner(xdr, &args->lock_owner);
1248         }
1249         else {
1250                 p = reserve_space(xdr, NFS4_STATEID_SIZE+4);
1251                 p = xdr_encode_opaque_fixed(p, args->lock_stateid->data, NFS4_STATEID_SIZE);
1252                 *p = cpu_to_be32(args->lock_seqid->sequence->counter);
1253         }
1254         hdr->nops++;
1255         hdr->replen += decode_lock_maxsz;
1256 }
1257
1258 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1259 {
1260         __be32 *p;
1261
1262         p = reserve_space(xdr, 24);
1263         *p++ = cpu_to_be32(OP_LOCKT);
1264         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1265         p = xdr_encode_hyper(p, args->fl->fl_start);
1266         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1267         encode_lockowner(xdr, &args->lock_owner);
1268         hdr->nops++;
1269         hdr->replen += decode_lockt_maxsz;
1270 }
1271
1272 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1273 {
1274         __be32 *p;
1275
1276         p = reserve_space(xdr, 12+NFS4_STATEID_SIZE+16);
1277         *p++ = cpu_to_be32(OP_LOCKU);
1278         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1279         *p++ = cpu_to_be32(args->seqid->sequence->counter);
1280         p = xdr_encode_opaque_fixed(p, args->stateid->data, NFS4_STATEID_SIZE);
1281         p = xdr_encode_hyper(p, args->fl->fl_start);
1282         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1283         hdr->nops++;
1284         hdr->replen += decode_locku_maxsz;
1285 }
1286
1287 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1288 {
1289         __be32 *p;
1290
1291         p = reserve_space(xdr, 4);
1292         *p = cpu_to_be32(OP_RELEASE_LOCKOWNER);
1293         encode_lockowner(xdr, lowner);
1294         hdr->nops++;
1295         hdr->replen += decode_release_lockowner_maxsz;
1296 }
1297
1298 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1299 {
1300         int len = name->len;
1301         __be32 *p;
1302
1303         p = reserve_space(xdr, 8 + len);
1304         *p++ = cpu_to_be32(OP_LOOKUP);
1305         xdr_encode_opaque(p, name->name, len);
1306         hdr->nops++;
1307         hdr->replen += decode_lookup_maxsz;
1308 }
1309
1310 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1311 {
1312         __be32 *p;
1313
1314         p = reserve_space(xdr, 8);
1315         switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1316         case FMODE_READ:
1317                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1318                 break;
1319         case FMODE_WRITE:
1320                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1321                 break;
1322         case FMODE_READ|FMODE_WRITE:
1323                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1324                 break;
1325         default:
1326                 *p++ = cpu_to_be32(0);
1327         }
1328         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1329 }
1330
1331 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1332 {
1333         __be32 *p;
1334  /*
1335  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1336  * owner 4 = 32
1337  */
1338         p = reserve_space(xdr, 8);
1339         *p++ = cpu_to_be32(OP_OPEN);
1340         *p = cpu_to_be32(arg->seqid->sequence->counter);
1341         encode_share_access(xdr, arg->fmode);
1342         p = reserve_space(xdr, 32);
1343         p = xdr_encode_hyper(p, arg->clientid);
1344         *p++ = cpu_to_be32(20);
1345         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1346         *p++ = cpu_to_be32(arg->server->s_dev);
1347         xdr_encode_hyper(p, arg->id);
1348 }
1349
1350 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1351 {
1352         __be32 *p;
1353         struct nfs_client *clp;
1354
1355         p = reserve_space(xdr, 4);
1356         switch(arg->open_flags & O_EXCL) {
1357         case 0:
1358                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1359                 encode_attrs(xdr, arg->u.attrs, arg->server);
1360                 break;
1361         default:
1362                 clp = arg->server->nfs_client;
1363                 if (clp->cl_mvops->minor_version > 0) {
1364                         if (nfs4_has_persistent_session(clp)) {
1365                                 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1366                                 encode_attrs(xdr, arg->u.attrs, arg->server);
1367                         } else {
1368                                 struct iattr dummy;
1369
1370                                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1371                                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1372                                 dummy.ia_valid = 0;
1373                                 encode_attrs(xdr, &dummy, arg->server);
1374                         }
1375                 } else {
1376                         *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1377                         encode_nfs4_verifier(xdr, &arg->u.verifier);
1378                 }
1379         }
1380 }
1381
1382 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1383 {
1384         __be32 *p;
1385
1386         p = reserve_space(xdr, 4);
1387         switch (arg->open_flags & O_CREAT) {
1388         case 0:
1389                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1390                 break;
1391         default:
1392                 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1393                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1394                 encode_createmode(xdr, arg);
1395         }
1396 }
1397
1398 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1399 {
1400         __be32 *p;
1401
1402         p = reserve_space(xdr, 4);
1403         switch (delegation_type) {
1404         case 0:
1405                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1406                 break;
1407         case FMODE_READ:
1408                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1409                 break;
1410         case FMODE_WRITE|FMODE_READ:
1411                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1412                 break;
1413         default:
1414                 BUG();
1415         }
1416 }
1417
1418 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1419 {
1420         __be32 *p;
1421
1422         p = reserve_space(xdr, 4);
1423         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1424         encode_string(xdr, name->len, name->name);
1425 }
1426
1427 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1428 {
1429         __be32 *p;
1430
1431         p = reserve_space(xdr, 4);
1432         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1433         encode_delegation_type(xdr, type);
1434 }
1435
1436 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1437 {
1438         __be32 *p;
1439
1440         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1441         *p++ = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1442         xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1443         encode_string(xdr, name->len, name->name);
1444 }
1445
1446 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1447 {
1448         encode_openhdr(xdr, arg);
1449         encode_opentype(xdr, arg);
1450         switch (arg->claim) {
1451         case NFS4_OPEN_CLAIM_NULL:
1452                 encode_claim_null(xdr, arg->name);
1453                 break;
1454         case NFS4_OPEN_CLAIM_PREVIOUS:
1455                 encode_claim_previous(xdr, arg->u.delegation_type);
1456                 break;
1457         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1458                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1459                 break;
1460         default:
1461                 BUG();
1462         }
1463         hdr->nops++;
1464         hdr->replen += decode_open_maxsz;
1465 }
1466
1467 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1468 {
1469         __be32 *p;
1470
1471         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1472         *p++ = cpu_to_be32(OP_OPEN_CONFIRM);
1473         p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1474         *p = cpu_to_be32(arg->seqid->sequence->counter);
1475         hdr->nops++;
1476         hdr->replen += decode_open_confirm_maxsz;
1477 }
1478
1479 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1480 {
1481         __be32 *p;
1482
1483         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1484         *p++ = cpu_to_be32(OP_OPEN_DOWNGRADE);
1485         p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1486         *p = cpu_to_be32(arg->seqid->sequence->counter);
1487         encode_share_access(xdr, arg->fmode);
1488         hdr->nops++;
1489         hdr->replen += decode_open_downgrade_maxsz;
1490 }
1491
1492 static void
1493 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1494 {
1495         int len = fh->size;
1496         __be32 *p;
1497
1498         p = reserve_space(xdr, 8 + len);
1499         *p++ = cpu_to_be32(OP_PUTFH);
1500         xdr_encode_opaque(p, fh->data, len);
1501         hdr->nops++;
1502         hdr->replen += decode_putfh_maxsz;
1503 }
1504
1505 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1506 {
1507         __be32 *p;
1508
1509         p = reserve_space(xdr, 4);
1510         *p = cpu_to_be32(OP_PUTROOTFH);
1511         hdr->nops++;
1512         hdr->replen += decode_putrootfh_maxsz;
1513 }
1514
1515 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx, const struct nfs_lock_context *l_ctx, int zero_seqid)
1516 {
1517         nfs4_stateid stateid;
1518         __be32 *p;
1519
1520         p = reserve_space(xdr, NFS4_STATEID_SIZE);
1521         if (ctx->state != NULL) {
1522                 nfs4_copy_stateid(&stateid, ctx->state, l_ctx->lockowner, l_ctx->pid);
1523                 if (zero_seqid)
1524                         stateid.stateid.seqid = 0;
1525                 xdr_encode_opaque_fixed(p, stateid.data, NFS4_STATEID_SIZE);
1526         } else
1527                 xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1528 }
1529
1530 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1531 {
1532         __be32 *p;
1533
1534         p = reserve_space(xdr, 4);
1535         *p = cpu_to_be32(OP_READ);
1536
1537         encode_stateid(xdr, args->context, args->lock_context,
1538                        hdr->minorversion);
1539
1540         p = reserve_space(xdr, 12);
1541         p = xdr_encode_hyper(p, args->offset);
1542         *p = cpu_to_be32(args->count);
1543         hdr->nops++;
1544         hdr->replen += decode_read_maxsz;
1545 }
1546
1547 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1548 {
1549         uint32_t attrs[2] = {
1550                 FATTR4_WORD0_RDATTR_ERROR,
1551                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1552         };
1553         uint32_t dircount = readdir->count >> 1;
1554         __be32 *p;
1555
1556         if (readdir->plus) {
1557                 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1558                         FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1559                 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1560                         FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1561                         FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1562                         FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1563                 dircount >>= 1;
1564         }
1565         /* Use mounted_on_fileid only if the server supports it */
1566         if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1567                 attrs[0] |= FATTR4_WORD0_FILEID;
1568
1569         p = reserve_space(xdr, 12+NFS4_VERIFIER_SIZE+20);
1570         *p++ = cpu_to_be32(OP_READDIR);
1571         p = xdr_encode_hyper(p, readdir->cookie);
1572         p = xdr_encode_opaque_fixed(p, readdir->verifier.data, NFS4_VERIFIER_SIZE);
1573         *p++ = cpu_to_be32(dircount);
1574         *p++ = cpu_to_be32(readdir->count);
1575         *p++ = cpu_to_be32(2);
1576
1577         *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1578         *p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1579         hdr->nops++;
1580         hdr->replen += decode_readdir_maxsz;
1581         dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1582                         __func__,
1583                         (unsigned long long)readdir->cookie,
1584                         ((u32 *)readdir->verifier.data)[0],
1585                         ((u32 *)readdir->verifier.data)[1],
1586                         attrs[0] & readdir->bitmask[0],
1587                         attrs[1] & readdir->bitmask[1]);
1588 }
1589
1590 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1591 {
1592         __be32 *p;
1593
1594         p = reserve_space(xdr, 4);
1595         *p = cpu_to_be32(OP_READLINK);
1596         hdr->nops++;
1597         hdr->replen += decode_readlink_maxsz;
1598 }
1599
1600 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1601 {
1602         __be32 *p;
1603
1604         p = reserve_space(xdr, 8 + name->len);
1605         *p++ = cpu_to_be32(OP_REMOVE);
1606         xdr_encode_opaque(p, name->name, name->len);
1607         hdr->nops++;
1608         hdr->replen += decode_remove_maxsz;
1609 }
1610
1611 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1612 {
1613         __be32 *p;
1614
1615         p = reserve_space(xdr, 4);
1616         *p = cpu_to_be32(OP_RENAME);
1617         encode_string(xdr, oldname->len, oldname->name);
1618         encode_string(xdr, newname->len, newname->name);
1619         hdr->nops++;
1620         hdr->replen += decode_rename_maxsz;
1621 }
1622
1623 static void encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid, struct compound_hdr *hdr)
1624 {
1625         __be32 *p;
1626
1627         p = reserve_space(xdr, 12);
1628         *p++ = cpu_to_be32(OP_RENEW);
1629         xdr_encode_hyper(p, client_stateid->cl_clientid);
1630         hdr->nops++;
1631         hdr->replen += decode_renew_maxsz;
1632 }
1633
1634 static void
1635 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1636 {
1637         __be32 *p;
1638
1639         p = reserve_space(xdr, 4);
1640         *p = cpu_to_be32(OP_RESTOREFH);
1641         hdr->nops++;
1642         hdr->replen += decode_restorefh_maxsz;
1643 }
1644
1645 static void
1646 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1647 {
1648         __be32 *p;
1649
1650         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1651         *p++ = cpu_to_be32(OP_SETATTR);
1652         xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1653         p = reserve_space(xdr, 2*4);
1654         *p++ = cpu_to_be32(1);
1655         *p = cpu_to_be32(FATTR4_WORD0_ACL);
1656         BUG_ON(arg->acl_len % 4);
1657         p = reserve_space(xdr, 4);
1658         *p = cpu_to_be32(arg->acl_len);
1659         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1660         hdr->nops++;
1661         hdr->replen += decode_setacl_maxsz;
1662 }
1663
1664 static void
1665 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1666 {
1667         __be32 *p;
1668
1669         p = reserve_space(xdr, 4);
1670         *p = cpu_to_be32(OP_SAVEFH);
1671         hdr->nops++;
1672         hdr->replen += decode_savefh_maxsz;
1673 }
1674
1675 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1676 {
1677         __be32 *p;
1678
1679         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1680         *p++ = cpu_to_be32(OP_SETATTR);
1681         xdr_encode_opaque_fixed(p, arg->stateid.data, NFS4_STATEID_SIZE);
1682         hdr->nops++;
1683         hdr->replen += decode_setattr_maxsz;
1684         encode_attrs(xdr, arg->iap, server);
1685 }
1686
1687 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1688 {
1689         __be32 *p;
1690
1691         p = reserve_space(xdr, 4 + NFS4_VERIFIER_SIZE);
1692         *p++ = cpu_to_be32(OP_SETCLIENTID);
1693         xdr_encode_opaque_fixed(p, setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
1694
1695         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1696         p = reserve_space(xdr, 4);
1697         *p = cpu_to_be32(setclientid->sc_prog);
1698         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1699         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1700         p = reserve_space(xdr, 4);
1701         *p = cpu_to_be32(setclientid->sc_cb_ident);
1702         hdr->nops++;
1703         hdr->replen += decode_setclientid_maxsz;
1704 }
1705
1706 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1707 {
1708         __be32 *p;
1709
1710         p = reserve_space(xdr, 12 + NFS4_VERIFIER_SIZE);
1711         *p++ = cpu_to_be32(OP_SETCLIENTID_CONFIRM);
1712         p = xdr_encode_hyper(p, arg->clientid);
1713         xdr_encode_opaque_fixed(p, arg->confirm.data, NFS4_VERIFIER_SIZE);
1714         hdr->nops++;
1715         hdr->replen += decode_setclientid_confirm_maxsz;
1716 }
1717
1718 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1719 {
1720         __be32 *p;
1721
1722         p = reserve_space(xdr, 4);
1723         *p = cpu_to_be32(OP_WRITE);
1724
1725         encode_stateid(xdr, args->context, args->lock_context,
1726                        hdr->minorversion);
1727
1728         p = reserve_space(xdr, 16);
1729         p = xdr_encode_hyper(p, args->offset);
1730         *p++ = cpu_to_be32(args->stable);
1731         *p = cpu_to_be32(args->count);
1732
1733         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1734         hdr->nops++;
1735         hdr->replen += decode_write_maxsz;
1736 }
1737
1738 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1739 {
1740         __be32 *p;
1741
1742         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1743
1744         *p++ = cpu_to_be32(OP_DELEGRETURN);
1745         xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1746         hdr->nops++;
1747         hdr->replen += decode_delegreturn_maxsz;
1748 }
1749
1750 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1751 {
1752         int len = name->len;
1753         __be32 *p;
1754
1755         p = reserve_space(xdr, 8 + len);
1756         *p++ = cpu_to_be32(OP_SECINFO);
1757         xdr_encode_opaque(p, name->name, len);
1758         hdr->nops++;
1759         hdr->replen += decode_secinfo_maxsz;
1760 }
1761
1762 #if defined(CONFIG_NFS_V4_1)
1763 /* NFSv4.1 operations */
1764 static void encode_exchange_id(struct xdr_stream *xdr,
1765                                struct nfs41_exchange_id_args *args,
1766                                struct compound_hdr *hdr)
1767 {
1768         __be32 *p;
1769
1770         p = reserve_space(xdr, 4 + sizeof(args->verifier->data));
1771         *p++ = cpu_to_be32(OP_EXCHANGE_ID);
1772         xdr_encode_opaque_fixed(p, args->verifier->data, sizeof(args->verifier->data));
1773
1774         encode_string(xdr, args->id_len, args->id);
1775
1776         p = reserve_space(xdr, 12);
1777         *p++ = cpu_to_be32(args->flags);
1778         *p++ = cpu_to_be32(0);  /* zero length state_protect4_a */
1779         *p = cpu_to_be32(0);    /* zero length implementation id array */
1780         hdr->nops++;
1781         hdr->replen += decode_exchange_id_maxsz;
1782 }
1783
1784 static void encode_create_session(struct xdr_stream *xdr,
1785                                   struct nfs41_create_session_args *args,
1786                                   struct compound_hdr *hdr)
1787 {
1788         __be32 *p;
1789         char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1790         uint32_t len;
1791         struct nfs_client *clp = args->client;
1792         u32 max_resp_sz_cached;
1793
1794         /*
1795          * Assumes OPEN is the biggest non-idempotent compound.
1796          * 2 is the verifier.
1797          */
1798         max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1799                               RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1800
1801         len = scnprintf(machine_name, sizeof(machine_name), "%s",
1802                         clp->cl_ipaddr);
1803
1804         p = reserve_space(xdr, 20 + 2*28 + 20 + len + 12);
1805         *p++ = cpu_to_be32(OP_CREATE_SESSION);
1806         p = xdr_encode_hyper(p, clp->cl_clientid);
1807         *p++ = cpu_to_be32(clp->cl_seqid);                      /*Sequence id */
1808         *p++ = cpu_to_be32(args->flags);                        /*flags */
1809
1810         /* Fore Channel */
1811         *p++ = cpu_to_be32(0);                          /* header padding size */
1812         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1813         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1814         *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1815         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1816         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1817         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1818
1819         /* Back Channel */
1820         *p++ = cpu_to_be32(0);                          /* header padding size */
1821         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1822         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1823         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1824         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1825         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1826         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1827
1828         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1829         *p++ = cpu_to_be32(1);
1830         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1831
1832         /* authsys_parms rfc1831 */
1833         *p++ = cpu_to_be32((u32)clp->cl_boot_time.tv_nsec);     /* stamp */
1834         p = xdr_encode_opaque(p, machine_name, len);
1835         *p++ = cpu_to_be32(0);                          /* UID */
1836         *p++ = cpu_to_be32(0);                          /* GID */
1837         *p = cpu_to_be32(0);                            /* No more gids */
1838         hdr->nops++;
1839         hdr->replen += decode_create_session_maxsz;
1840 }
1841
1842 static void encode_destroy_session(struct xdr_stream *xdr,
1843                                    struct nfs4_session *session,
1844                                    struct compound_hdr *hdr)
1845 {
1846         __be32 *p;
1847         p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN);
1848         *p++ = cpu_to_be32(OP_DESTROY_SESSION);
1849         xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1850         hdr->nops++;
1851         hdr->replen += decode_destroy_session_maxsz;
1852 }
1853
1854 static void encode_reclaim_complete(struct xdr_stream *xdr,
1855                                     struct nfs41_reclaim_complete_args *args,
1856                                     struct compound_hdr *hdr)
1857 {
1858         __be32 *p;
1859
1860         p = reserve_space(xdr, 8);
1861         *p++ = cpu_to_be32(OP_RECLAIM_COMPLETE);
1862         *p++ = cpu_to_be32(args->one_fs);
1863         hdr->nops++;
1864         hdr->replen += decode_reclaim_complete_maxsz;
1865 }
1866 #endif /* CONFIG_NFS_V4_1 */
1867
1868 static void encode_sequence(struct xdr_stream *xdr,
1869                             const struct nfs4_sequence_args *args,
1870                             struct compound_hdr *hdr)
1871 {
1872 #if defined(CONFIG_NFS_V4_1)
1873         struct nfs4_session *session = args->sa_session;
1874         struct nfs4_slot_table *tp;
1875         struct nfs4_slot *slot;
1876         __be32 *p;
1877
1878         if (!session)
1879                 return;
1880
1881         tp = &session->fc_slot_table;
1882
1883         WARN_ON(args->sa_slotid == NFS4_MAX_SLOT_TABLE);
1884         slot = tp->slots + args->sa_slotid;
1885
1886         p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN + 16);
1887         *p++ = cpu_to_be32(OP_SEQUENCE);
1888
1889         /*
1890          * Sessionid + seqid + slotid + max slotid + cache_this
1891          */
1892         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1893                 "max_slotid=%d cache_this=%d\n",
1894                 __func__,
1895                 ((u32 *)session->sess_id.data)[0],
1896                 ((u32 *)session->sess_id.data)[1],
1897                 ((u32 *)session->sess_id.data)[2],
1898                 ((u32 *)session->sess_id.data)[3],
1899                 slot->seq_nr, args->sa_slotid,
1900                 tp->highest_used_slotid, args->sa_cache_this);
1901         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1902         *p++ = cpu_to_be32(slot->seq_nr);
1903         *p++ = cpu_to_be32(args->sa_slotid);
1904         *p++ = cpu_to_be32(tp->highest_used_slotid);
1905         *p = cpu_to_be32(args->sa_cache_this);
1906         hdr->nops++;
1907         hdr->replen += decode_sequence_maxsz;
1908 #endif /* CONFIG_NFS_V4_1 */
1909 }
1910
1911 #ifdef CONFIG_NFS_V4_1
1912 static void
1913 encode_getdevicelist(struct xdr_stream *xdr,
1914                      const struct nfs4_getdevicelist_args *args,
1915                      struct compound_hdr *hdr)
1916 {
1917         __be32 *p;
1918         nfs4_verifier dummy = {
1919                 .data = "dummmmmy",
1920         };
1921
1922         p = reserve_space(xdr, 20);
1923         *p++ = cpu_to_be32(OP_GETDEVICELIST);
1924         *p++ = cpu_to_be32(args->layoutclass);
1925         *p++ = cpu_to_be32(NFS4_PNFS_GETDEVLIST_MAXNUM);
1926         xdr_encode_hyper(p, 0ULL);                          /* cookie */
1927         encode_nfs4_verifier(xdr, &dummy);
1928         hdr->nops++;
1929         hdr->replen += decode_getdevicelist_maxsz;
1930 }
1931
1932 static void
1933 encode_getdeviceinfo(struct xdr_stream *xdr,
1934                      const struct nfs4_getdeviceinfo_args *args,
1935                      struct compound_hdr *hdr)
1936 {
1937         __be32 *p;
1938
1939         p = reserve_space(xdr, 16 + NFS4_DEVICEID4_SIZE);
1940         *p++ = cpu_to_be32(OP_GETDEVICEINFO);
1941         p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1942                                     NFS4_DEVICEID4_SIZE);
1943         *p++ = cpu_to_be32(args->pdev->layout_type);
1944         *p++ = cpu_to_be32(args->pdev->pglen);          /* gdia_maxcount */
1945         *p++ = cpu_to_be32(0);                          /* bitmap length 0 */
1946         hdr->nops++;
1947         hdr->replen += decode_getdeviceinfo_maxsz;
1948 }
1949
1950 static void
1951 encode_layoutget(struct xdr_stream *xdr,
1952                       const struct nfs4_layoutget_args *args,
1953                       struct compound_hdr *hdr)
1954 {
1955         __be32 *p;
1956
1957         p = reserve_space(xdr, 44 + NFS4_STATEID_SIZE);
1958         *p++ = cpu_to_be32(OP_LAYOUTGET);
1959         *p++ = cpu_to_be32(0);     /* Signal layout available */
1960         *p++ = cpu_to_be32(args->type);
1961         *p++ = cpu_to_be32(args->range.iomode);
1962         p = xdr_encode_hyper(p, args->range.offset);
1963         p = xdr_encode_hyper(p, args->range.length);
1964         p = xdr_encode_hyper(p, args->minlength);
1965         p = xdr_encode_opaque_fixed(p, &args->stateid.data, NFS4_STATEID_SIZE);
1966         *p = cpu_to_be32(args->maxcount);
1967
1968         dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1969                 __func__,
1970                 args->type,
1971                 args->range.iomode,
1972                 (unsigned long)args->range.offset,
1973                 (unsigned long)args->range.length,
1974                 args->maxcount);
1975         hdr->nops++;
1976         hdr->replen += decode_layoutget_maxsz;
1977 }
1978
1979 static int
1980 encode_layoutcommit(struct xdr_stream *xdr,
1981                     struct inode *inode,
1982                     const struct nfs4_layoutcommit_args *args,
1983                     struct compound_hdr *hdr)
1984 {
1985         __be32 *p;
1986
1987         dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1988                 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1989
1990         p = reserve_space(xdr, 44 + NFS4_STATEID_SIZE);
1991         *p++ = cpu_to_be32(OP_LAYOUTCOMMIT);
1992         /* Only whole file layouts */
1993         p = xdr_encode_hyper(p, 0); /* offset */
1994         p = xdr_encode_hyper(p, args->lastbytewritten + 1);     /* length */
1995         *p++ = cpu_to_be32(0); /* reclaim */
1996         p = xdr_encode_opaque_fixed(p, args->stateid.data, NFS4_STATEID_SIZE);
1997         *p++ = cpu_to_be32(1); /* newoffset = TRUE */
1998         p = xdr_encode_hyper(p, args->lastbytewritten);
1999         *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
2000         *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
2001
2002         if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit)
2003                 NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
2004                         NFS_I(inode)->layout, xdr, args);
2005         else {
2006                 p = reserve_space(xdr, 4);
2007                 *p = cpu_to_be32(0); /* no layout-type payload */
2008         }
2009
2010         hdr->nops++;
2011         hdr->replen += decode_layoutcommit_maxsz;
2012         return 0;
2013 }
2014
2015 static void
2016 encode_layoutreturn(struct xdr_stream *xdr,
2017                     const struct nfs4_layoutreturn_args *args,
2018                     struct compound_hdr *hdr)
2019 {
2020         __be32 *p;
2021
2022         p = reserve_space(xdr, 20);
2023         *p++ = cpu_to_be32(OP_LAYOUTRETURN);
2024         *p++ = cpu_to_be32(0);          /* reclaim. always 0 for now */
2025         *p++ = cpu_to_be32(args->layout_type);
2026         *p++ = cpu_to_be32(IOMODE_ANY);
2027         *p = cpu_to_be32(RETURN_FILE);
2028         p = reserve_space(xdr, 16 + NFS4_STATEID_SIZE);
2029         p = xdr_encode_hyper(p, 0);
2030         p = xdr_encode_hyper(p, NFS4_MAX_UINT64);
2031         spin_lock(&args->inode->i_lock);
2032         xdr_encode_opaque_fixed(p, &args->stateid.data, NFS4_STATEID_SIZE);
2033         spin_unlock(&args->inode->i_lock);
2034         if (NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn) {
2035                 NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn(
2036                         NFS_I(args->inode)->layout, xdr, args);
2037         } else {
2038                 p = reserve_space(xdr, 4);
2039                 *p = cpu_to_be32(0);
2040         }
2041         hdr->nops++;
2042         hdr->replen += decode_layoutreturn_maxsz;
2043 }
2044
2045 static int
2046 encode_secinfo_no_name(struct xdr_stream *xdr,
2047                        const struct nfs41_secinfo_no_name_args *args,
2048                        struct compound_hdr *hdr)
2049 {
2050         __be32 *p;
2051         p = reserve_space(xdr, 8);
2052         *p++ = cpu_to_be32(OP_SECINFO_NO_NAME);
2053         *p++ = cpu_to_be32(args->style);
2054         hdr->nops++;
2055         hdr->replen += decode_secinfo_no_name_maxsz;
2056         return 0;
2057 }
2058
2059 static void encode_test_stateid(struct xdr_stream *xdr,
2060                                 struct nfs41_test_stateid_args *args,
2061                                 struct compound_hdr *hdr)
2062 {
2063         __be32 *p;
2064
2065         p = reserve_space(xdr, 8 + NFS4_STATEID_SIZE);
2066         *p++ = cpu_to_be32(OP_TEST_STATEID);
2067         *p++ = cpu_to_be32(1);
2068         xdr_encode_opaque_fixed(p, args->stateid->data, NFS4_STATEID_SIZE);
2069         hdr->nops++;
2070         hdr->replen += decode_test_stateid_maxsz;
2071 }
2072
2073 static void encode_free_stateid(struct xdr_stream *xdr,
2074                                 struct nfs41_free_stateid_args *args,
2075                                 struct compound_hdr *hdr)
2076 {
2077         __be32 *p;
2078         p = reserve_space(xdr, 4 + NFS4_STATEID_SIZE);
2079         *p++ = cpu_to_be32(OP_FREE_STATEID);
2080         xdr_encode_opaque_fixed(p, args->stateid->data, NFS4_STATEID_SIZE);
2081         hdr->nops++;
2082         hdr->replen += decode_free_stateid_maxsz;
2083 }
2084 #endif /* CONFIG_NFS_V4_1 */
2085
2086 /*
2087  * END OF "GENERIC" ENCODE ROUTINES.
2088  */
2089
2090 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2091 {
2092 #if defined(CONFIG_NFS_V4_1)
2093         if (args->sa_session)
2094                 return args->sa_session->clp->cl_mvops->minor_version;
2095 #endif /* CONFIG_NFS_V4_1 */
2096         return 0;
2097 }
2098
2099 /*
2100  * Encode an ACCESS request
2101  */
2102 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2103                                 const struct nfs4_accessargs *args)
2104 {
2105         struct compound_hdr hdr = {
2106                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2107         };
2108
2109         encode_compound_hdr(xdr, req, &hdr);
2110         encode_sequence(xdr, &args->seq_args, &hdr);
2111         encode_putfh(xdr, args->fh, &hdr);
2112         encode_access(xdr, args->access, &hdr);
2113         encode_getfattr(xdr, args->bitmask, &hdr);
2114         encode_nops(&hdr);
2115 }
2116
2117 /*
2118  * Encode LOOKUP request
2119  */
2120 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2121                                 const struct nfs4_lookup_arg *args)
2122 {
2123         struct compound_hdr hdr = {
2124                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2125         };
2126
2127         encode_compound_hdr(xdr, req, &hdr);
2128         encode_sequence(xdr, &args->seq_args, &hdr);
2129         encode_putfh(xdr, args->dir_fh, &hdr);
2130         encode_lookup(xdr, args->name, &hdr);
2131         encode_getfh(xdr, &hdr);
2132         encode_getfattr(xdr, args->bitmask, &hdr);
2133         encode_nops(&hdr);
2134 }
2135
2136 /*
2137  * Encode LOOKUP_ROOT request
2138  */
2139 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2140                                      struct xdr_stream *xdr,
2141                                      const struct nfs4_lookup_root_arg *args)
2142 {
2143         struct compound_hdr hdr = {
2144                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2145         };
2146
2147         encode_compound_hdr(xdr, req, &hdr);
2148         encode_sequence(xdr, &args->seq_args, &hdr);
2149         encode_putrootfh(xdr, &hdr);
2150         encode_getfh(xdr, &hdr);
2151         encode_getfattr(xdr, args->bitmask, &hdr);
2152         encode_nops(&hdr);
2153 }
2154
2155 /*
2156  * Encode REMOVE request
2157  */
2158 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2159                                 const struct nfs_removeargs *args)
2160 {
2161         struct compound_hdr hdr = {
2162                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2163         };
2164
2165         encode_compound_hdr(xdr, req, &hdr);
2166         encode_sequence(xdr, &args->seq_args, &hdr);
2167         encode_putfh(xdr, args->fh, &hdr);
2168         encode_remove(xdr, &args->name, &hdr);
2169         encode_getfattr(xdr, args->bitmask, &hdr);
2170         encode_nops(&hdr);
2171 }
2172
2173 /*
2174  * Encode RENAME request
2175  */
2176 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2177                                 const struct nfs_renameargs *args)
2178 {
2179         struct compound_hdr hdr = {
2180                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2181         };
2182
2183         encode_compound_hdr(xdr, req, &hdr);
2184         encode_sequence(xdr, &args->seq_args, &hdr);
2185         encode_putfh(xdr, args->old_dir, &hdr);
2186         encode_savefh(xdr, &hdr);
2187         encode_putfh(xdr, args->new_dir, &hdr);
2188         encode_rename(xdr, args->old_name, args->new_name, &hdr);
2189         encode_getfattr(xdr, args->bitmask, &hdr);
2190         encode_restorefh(xdr, &hdr);
2191         encode_getfattr(xdr, args->bitmask, &hdr);
2192         encode_nops(&hdr);
2193 }
2194
2195 /*
2196  * Encode LINK request
2197  */
2198 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2199                              const struct nfs4_link_arg *args)
2200 {
2201         struct compound_hdr hdr = {
2202                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2203         };
2204
2205         encode_compound_hdr(xdr, req, &hdr);
2206         encode_sequence(xdr, &args->seq_args, &hdr);
2207         encode_putfh(xdr, args->fh, &hdr);
2208         encode_savefh(xdr, &hdr);
2209         encode_putfh(xdr, args->dir_fh, &hdr);
2210         encode_link(xdr, args->name, &hdr);
2211         encode_getfattr(xdr, args->bitmask, &hdr);
2212         encode_restorefh(xdr, &hdr);
2213         encode_getfattr(xdr, args->bitmask, &hdr);
2214         encode_nops(&hdr);
2215 }
2216
2217 /*
2218  * Encode CREATE request
2219  */
2220 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2221                                 const struct nfs4_create_arg *args)
2222 {
2223         struct compound_hdr hdr = {
2224                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2225         };
2226
2227         encode_compound_hdr(xdr, req, &hdr);
2228         encode_sequence(xdr, &args->seq_args, &hdr);
2229         encode_putfh(xdr, args->dir_fh, &hdr);
2230         encode_savefh(xdr, &hdr);
2231         encode_create(xdr, args, &hdr);
2232         encode_getfh(xdr, &hdr);
2233         encode_getfattr(xdr, args->bitmask, &hdr);
2234         encode_restorefh(xdr, &hdr);
2235         encode_getfattr(xdr, args->bitmask, &hdr);
2236         encode_nops(&hdr);
2237 }
2238
2239 /*
2240  * Encode SYMLINK request
2241  */
2242 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2243                                  const struct nfs4_create_arg *args)
2244 {
2245         nfs4_xdr_enc_create(req, xdr, args);
2246 }
2247
2248 /*
2249  * Encode GETATTR request
2250  */
2251 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2252                                  const struct nfs4_getattr_arg *args)
2253 {
2254         struct compound_hdr hdr = {
2255                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2256         };
2257
2258         encode_compound_hdr(xdr, req, &hdr);
2259         encode_sequence(xdr, &args->seq_args, &hdr);
2260         encode_putfh(xdr, args->fh, &hdr);
2261         encode_getfattr(xdr, args->bitmask, &hdr);
2262         encode_nops(&hdr);
2263 }
2264
2265 /*
2266  * Encode a CLOSE request
2267  */
2268 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2269                                struct nfs_closeargs *args)
2270 {
2271         struct compound_hdr hdr = {
2272                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2273         };
2274
2275         encode_compound_hdr(xdr, req, &hdr);
2276         encode_sequence(xdr, &args->seq_args, &hdr);
2277         encode_putfh(xdr, args->fh, &hdr);
2278         encode_close(xdr, args, &hdr);
2279         encode_getfattr(xdr, args->bitmask, &hdr);
2280         encode_nops(&hdr);
2281 }
2282
2283 /*
2284  * Encode an OPEN request
2285  */
2286 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2287                               struct nfs_openargs *args)
2288 {
2289         struct compound_hdr hdr = {
2290                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2291         };
2292
2293         encode_compound_hdr(xdr, req, &hdr);
2294         encode_sequence(xdr, &args->seq_args, &hdr);
2295         encode_putfh(xdr, args->fh, &hdr);
2296         encode_savefh(xdr, &hdr);
2297         encode_open(xdr, args, &hdr);
2298         encode_getfh(xdr, &hdr);
2299         encode_getfattr(xdr, args->bitmask, &hdr);
2300         encode_restorefh(xdr, &hdr);
2301         encode_getfattr(xdr, args->bitmask, &hdr);
2302         encode_nops(&hdr);
2303 }
2304
2305 /*
2306  * Encode an OPEN_CONFIRM request
2307  */
2308 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2309                                       struct xdr_stream *xdr,
2310                                       struct nfs_open_confirmargs *args)
2311 {
2312         struct compound_hdr hdr = {
2313                 .nops   = 0,
2314         };
2315
2316         encode_compound_hdr(xdr, req, &hdr);
2317         encode_putfh(xdr, args->fh, &hdr);
2318         encode_open_confirm(xdr, args, &hdr);
2319         encode_nops(&hdr);
2320 }
2321
2322 /*
2323  * Encode an OPEN request with no attributes.
2324  */
2325 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2326                                      struct xdr_stream *xdr,
2327                                      struct nfs_openargs *args)
2328 {
2329         struct compound_hdr hdr = {
2330                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2331         };
2332
2333         encode_compound_hdr(xdr, req, &hdr);
2334         encode_sequence(xdr, &args->seq_args, &hdr);
2335         encode_putfh(xdr, args->fh, &hdr);
2336         encode_open(xdr, args, &hdr);
2337         encode_getfattr(xdr, args->bitmask, &hdr);
2338         encode_nops(&hdr);
2339 }
2340
2341 /*
2342  * Encode an OPEN_DOWNGRADE request
2343  */
2344 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2345                                         struct xdr_stream *xdr,
2346                                         struct nfs_closeargs *args)
2347 {
2348         struct compound_hdr hdr = {
2349                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2350         };
2351
2352         encode_compound_hdr(xdr, req, &hdr);
2353         encode_sequence(xdr, &args->seq_args, &hdr);
2354         encode_putfh(xdr, args->fh, &hdr);
2355         encode_open_downgrade(xdr, args, &hdr);
2356         encode_getfattr(xdr, args->bitmask, &hdr);
2357         encode_nops(&hdr);
2358 }
2359
2360 /*
2361  * Encode a LOCK request
2362  */
2363 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2364                               struct nfs_lock_args *args)
2365 {
2366         struct compound_hdr hdr = {
2367                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2368         };
2369
2370         encode_compound_hdr(xdr, req, &hdr);
2371         encode_sequence(xdr, &args->seq_args, &hdr);
2372         encode_putfh(xdr, args->fh, &hdr);
2373         encode_lock(xdr, args, &hdr);
2374         encode_nops(&hdr);
2375 }
2376
2377 /*
2378  * Encode a LOCKT request
2379  */
2380 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2381                                struct nfs_lockt_args *args)
2382 {
2383         struct compound_hdr hdr = {
2384                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2385         };
2386
2387         encode_compound_hdr(xdr, req, &hdr);
2388         encode_sequence(xdr, &args->seq_args, &hdr);
2389         encode_putfh(xdr, args->fh, &hdr);
2390         encode_lockt(xdr, args, &hdr);
2391         encode_nops(&hdr);
2392 }
2393
2394 /*
2395  * Encode a LOCKU request
2396  */
2397 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2398                                struct nfs_locku_args *args)
2399 {
2400         struct compound_hdr hdr = {
2401                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2402         };
2403
2404         encode_compound_hdr(xdr, req, &hdr);
2405         encode_sequence(xdr, &args->seq_args, &hdr);
2406         encode_putfh(xdr, args->fh, &hdr);
2407         encode_locku(xdr, args, &hdr);
2408         encode_nops(&hdr);
2409 }
2410
2411 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2412                                            struct xdr_stream *xdr,
2413                                         struct nfs_release_lockowner_args *args)
2414 {
2415         struct compound_hdr hdr = {
2416                 .minorversion = 0,
2417         };
2418
2419         encode_compound_hdr(xdr, req, &hdr);
2420         encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2421         encode_nops(&hdr);
2422 }
2423
2424 /*
2425  * Encode a READLINK request
2426  */
2427 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2428                                   const struct nfs4_readlink *args)
2429 {
2430         struct compound_hdr hdr = {
2431                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2432         };
2433
2434         encode_compound_hdr(xdr, req, &hdr);
2435         encode_sequence(xdr, &args->seq_args, &hdr);
2436         encode_putfh(xdr, args->fh, &hdr);
2437         encode_readlink(xdr, args, req, &hdr);
2438
2439         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2440                         args->pgbase, args->pglen);
2441         encode_nops(&hdr);
2442 }
2443
2444 /*
2445  * Encode a READDIR request
2446  */
2447 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2448                                  const struct nfs4_readdir_arg *args)
2449 {
2450         struct compound_hdr hdr = {
2451                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2452         };
2453
2454         encode_compound_hdr(xdr, req, &hdr);
2455         encode_sequence(xdr, &args->seq_args, &hdr);
2456         encode_putfh(xdr, args->fh, &hdr);
2457         encode_readdir(xdr, args, req, &hdr);
2458
2459         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2460                          args->pgbase, args->count);
2461         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2462                         __func__, hdr.replen << 2, args->pages,
2463                         args->pgbase, args->count);
2464         encode_nops(&hdr);
2465 }
2466
2467 /*
2468  * Encode a READ request
2469  */
2470 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2471                               struct nfs_readargs *args)
2472 {
2473         struct compound_hdr hdr = {
2474                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2475         };
2476
2477         encode_compound_hdr(xdr, req, &hdr);
2478         encode_sequence(xdr, &args->seq_args, &hdr);
2479         encode_putfh(xdr, args->fh, &hdr);
2480         encode_read(xdr, args, &hdr);
2481
2482         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2483                          args->pages, args->pgbase, args->count);
2484         req->rq_rcv_buf.flags |= XDRBUF_READ;
2485         encode_nops(&hdr);
2486 }
2487
2488 /*
2489  * Encode an SETATTR request
2490  */
2491 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2492                                  struct nfs_setattrargs *args)
2493 {
2494         struct compound_hdr hdr = {
2495                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2496         };
2497
2498         encode_compound_hdr(xdr, req, &hdr);
2499         encode_sequence(xdr, &args->seq_args, &hdr);
2500         encode_putfh(xdr, args->fh, &hdr);
2501         encode_setattr(xdr, args, args->server, &hdr);
2502         encode_getfattr(xdr, args->bitmask, &hdr);
2503         encode_nops(&hdr);
2504 }
2505
2506 /*
2507  * Encode a GETACL request
2508  */
2509 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2510                                 struct nfs_getaclargs *args)
2511 {
2512         struct compound_hdr hdr = {
2513                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2514         };
2515         uint32_t replen;
2516
2517         encode_compound_hdr(xdr, req, &hdr);
2518         encode_sequence(xdr, &args->seq_args, &hdr);
2519         encode_putfh(xdr, args->fh, &hdr);
2520         replen = hdr.replen + op_decode_hdr_maxsz + 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         xdr_set_scratch_buffer(xdr, page_address(args->acl_scratch), PAGE_SIZE);
2526
2527         encode_nops(&hdr);
2528 }
2529
2530 /*
2531  * Encode a WRITE request
2532  */
2533 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2534                                struct nfs_writeargs *args)
2535 {
2536         struct compound_hdr hdr = {
2537                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2538         };
2539
2540         encode_compound_hdr(xdr, req, &hdr);
2541         encode_sequence(xdr, &args->seq_args, &hdr);
2542         encode_putfh(xdr, args->fh, &hdr);
2543         encode_write(xdr, args, &hdr);
2544         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2545         if (args->bitmask)
2546                 encode_getfattr(xdr, args->bitmask, &hdr);
2547         encode_nops(&hdr);
2548 }
2549
2550 /*
2551  *  a COMMIT request
2552  */
2553 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2554                                 struct nfs_writeargs *args)
2555 {
2556         struct compound_hdr hdr = {
2557                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2558         };
2559
2560         encode_compound_hdr(xdr, req, &hdr);
2561         encode_sequence(xdr, &args->seq_args, &hdr);
2562         encode_putfh(xdr, args->fh, &hdr);
2563         encode_commit(xdr, args, &hdr);
2564         if (args->bitmask)
2565                 encode_getfattr(xdr, args->bitmask, &hdr);
2566         encode_nops(&hdr);
2567 }
2568
2569 /*
2570  * FSINFO request
2571  */
2572 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2573                                 struct nfs4_fsinfo_arg *args)
2574 {
2575         struct compound_hdr hdr = {
2576                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2577         };
2578
2579         encode_compound_hdr(xdr, req, &hdr);
2580         encode_sequence(xdr, &args->seq_args, &hdr);
2581         encode_putfh(xdr, args->fh, &hdr);
2582         encode_fsinfo(xdr, args->bitmask, &hdr);
2583         encode_nops(&hdr);
2584 }
2585
2586 /*
2587  * a PATHCONF request
2588  */
2589 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2590                                   const struct nfs4_pathconf_arg *args)
2591 {
2592         struct compound_hdr hdr = {
2593                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2594         };
2595
2596         encode_compound_hdr(xdr, req, &hdr);
2597         encode_sequence(xdr, &args->seq_args, &hdr);
2598         encode_putfh(xdr, args->fh, &hdr);
2599         encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2600                            &hdr);
2601         encode_nops(&hdr);
2602 }
2603
2604 /*
2605  * a STATFS request
2606  */
2607 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2608                                 const struct nfs4_statfs_arg *args)
2609 {
2610         struct compound_hdr hdr = {
2611                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2612         };
2613
2614         encode_compound_hdr(xdr, req, &hdr);
2615         encode_sequence(xdr, &args->seq_args, &hdr);
2616         encode_putfh(xdr, args->fh, &hdr);
2617         encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2618                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2619         encode_nops(&hdr);
2620 }
2621
2622 /*
2623  * GETATTR_BITMAP request
2624  */
2625 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2626                                      struct xdr_stream *xdr,
2627                                      struct nfs4_server_caps_arg *args)
2628 {
2629         struct compound_hdr hdr = {
2630                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2631         };
2632
2633         encode_compound_hdr(xdr, req, &hdr);
2634         encode_sequence(xdr, &args->seq_args, &hdr);
2635         encode_putfh(xdr, args->fhandle, &hdr);
2636         encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2637                            FATTR4_WORD0_LINK_SUPPORT|
2638                            FATTR4_WORD0_SYMLINK_SUPPORT|
2639                            FATTR4_WORD0_ACLSUPPORT, &hdr);
2640         encode_nops(&hdr);
2641 }
2642
2643 /*
2644  * a RENEW request
2645  */
2646 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2647                                struct nfs_client *clp)
2648 {
2649         struct compound_hdr hdr = {
2650                 .nops   = 0,
2651         };
2652
2653         encode_compound_hdr(xdr, req, &hdr);
2654         encode_renew(xdr, clp, &hdr);
2655         encode_nops(&hdr);
2656 }
2657
2658 /*
2659  * a SETCLIENTID request
2660  */
2661 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2662                                      struct xdr_stream *xdr,
2663                                      struct nfs4_setclientid *sc)
2664 {
2665         struct compound_hdr hdr = {
2666                 .nops   = 0,
2667         };
2668
2669         encode_compound_hdr(xdr, req, &hdr);
2670         encode_setclientid(xdr, sc, &hdr);
2671         encode_nops(&hdr);
2672 }
2673
2674 /*
2675  * a SETCLIENTID_CONFIRM request
2676  */
2677 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2678                                              struct xdr_stream *xdr,
2679                                              struct nfs4_setclientid_res *arg)
2680 {
2681         struct compound_hdr hdr = {
2682                 .nops   = 0,
2683         };
2684         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2685
2686         encode_compound_hdr(xdr, req, &hdr);
2687         encode_setclientid_confirm(xdr, arg, &hdr);
2688         encode_putrootfh(xdr, &hdr);
2689         encode_fsinfo(xdr, lease_bitmap, &hdr);
2690         encode_nops(&hdr);
2691 }
2692
2693 /*
2694  * DELEGRETURN request
2695  */
2696 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2697                                      struct xdr_stream *xdr,
2698                                      const struct nfs4_delegreturnargs *args)
2699 {
2700         struct compound_hdr hdr = {
2701                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2702         };
2703
2704         encode_compound_hdr(xdr, req, &hdr);
2705         encode_sequence(xdr, &args->seq_args, &hdr);
2706         encode_putfh(xdr, args->fhandle, &hdr);
2707         encode_delegreturn(xdr, args->stateid, &hdr);
2708         encode_getfattr(xdr, args->bitmask, &hdr);
2709         encode_nops(&hdr);
2710 }
2711
2712 /*
2713  * Encode FS_LOCATIONS request
2714  */
2715 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2716                                       struct xdr_stream *xdr,
2717                                       struct nfs4_fs_locations_arg *args)
2718 {
2719         struct compound_hdr hdr = {
2720                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2721         };
2722         uint32_t replen;
2723
2724         encode_compound_hdr(xdr, req, &hdr);
2725         encode_sequence(xdr, &args->seq_args, &hdr);
2726         encode_putfh(xdr, args->dir_fh, &hdr);
2727         encode_lookup(xdr, args->name, &hdr);
2728         replen = hdr.replen;    /* get the attribute into args->page */
2729         encode_fs_locations(xdr, args->bitmask, &hdr);
2730
2731         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2732                         0, PAGE_SIZE);
2733         encode_nops(&hdr);
2734 }
2735
2736 /*
2737  * Encode SECINFO request
2738  */
2739 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2740                                 struct xdr_stream *xdr,
2741                                 struct nfs4_secinfo_arg *args)
2742 {
2743         struct compound_hdr hdr = {
2744                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2745         };
2746
2747         encode_compound_hdr(xdr, req, &hdr);
2748         encode_sequence(xdr, &args->seq_args, &hdr);
2749         encode_putfh(xdr, args->dir_fh, &hdr);
2750         encode_secinfo(xdr, args->name, &hdr);
2751         encode_nops(&hdr);
2752 }
2753
2754 #if defined(CONFIG_NFS_V4_1)
2755 /*
2756  * EXCHANGE_ID request
2757  */
2758 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2759                                      struct xdr_stream *xdr,
2760                                      struct nfs41_exchange_id_args *args)
2761 {
2762         struct compound_hdr hdr = {
2763                 .minorversion = args->client->cl_mvops->minor_version,
2764         };
2765
2766         encode_compound_hdr(xdr, req, &hdr);
2767         encode_exchange_id(xdr, args, &hdr);
2768         encode_nops(&hdr);
2769 }
2770
2771 /*
2772  * a CREATE_SESSION request
2773  */
2774 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2775                                         struct xdr_stream *xdr,
2776                                         struct nfs41_create_session_args *args)
2777 {
2778         struct compound_hdr hdr = {
2779                 .minorversion = args->client->cl_mvops->minor_version,
2780         };
2781
2782         encode_compound_hdr(xdr, req, &hdr);
2783         encode_create_session(xdr, args, &hdr);
2784         encode_nops(&hdr);
2785 }
2786
2787 /*
2788  * a DESTROY_SESSION request
2789  */
2790 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2791                                          struct xdr_stream *xdr,
2792                                          struct nfs4_session *session)
2793 {
2794         struct compound_hdr hdr = {
2795                 .minorversion = session->clp->cl_mvops->minor_version,
2796         };
2797
2798         encode_compound_hdr(xdr, req, &hdr);
2799         encode_destroy_session(xdr, session, &hdr);
2800         encode_nops(&hdr);
2801 }
2802
2803 /*
2804  * a SEQUENCE request
2805  */
2806 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2807                                   struct nfs4_sequence_args *args)
2808 {
2809         struct compound_hdr hdr = {
2810                 .minorversion = nfs4_xdr_minorversion(args),
2811         };
2812
2813         encode_compound_hdr(xdr, req, &hdr);
2814         encode_sequence(xdr, args, &hdr);
2815         encode_nops(&hdr);
2816 }
2817
2818 /*
2819  * a GET_LEASE_TIME request
2820  */
2821 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2822                                         struct xdr_stream *xdr,
2823                                         struct nfs4_get_lease_time_args *args)
2824 {
2825         struct compound_hdr hdr = {
2826                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2827         };
2828         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2829
2830         encode_compound_hdr(xdr, req, &hdr);
2831         encode_sequence(xdr, &args->la_seq_args, &hdr);
2832         encode_putrootfh(xdr, &hdr);
2833         encode_fsinfo(xdr, lease_bitmap, &hdr);
2834         encode_nops(&hdr);
2835 }
2836
2837 /*
2838  * a RECLAIM_COMPLETE request
2839  */
2840 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2841                                           struct xdr_stream *xdr,
2842                                 struct nfs41_reclaim_complete_args *args)
2843 {
2844         struct compound_hdr hdr = {
2845                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2846         };
2847
2848         encode_compound_hdr(xdr, req, &hdr);
2849         encode_sequence(xdr, &args->seq_args, &hdr);
2850         encode_reclaim_complete(xdr, args, &hdr);
2851         encode_nops(&hdr);
2852 }
2853
2854 /*
2855  * Encode GETDEVICELIST request
2856  */
2857 static void nfs4_xdr_enc_getdevicelist(struct rpc_rqst *req,
2858                                        struct xdr_stream *xdr,
2859                                        struct nfs4_getdevicelist_args *args)
2860 {
2861         struct compound_hdr hdr = {
2862                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2863         };
2864
2865         encode_compound_hdr(xdr, req, &hdr);
2866         encode_sequence(xdr, &args->seq_args, &hdr);
2867         encode_putfh(xdr, args->fh, &hdr);
2868         encode_getdevicelist(xdr, args, &hdr);
2869         encode_nops(&hdr);
2870 }
2871
2872 /*
2873  * Encode GETDEVICEINFO request
2874  */
2875 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2876                                        struct xdr_stream *xdr,
2877                                        struct nfs4_getdeviceinfo_args *args)
2878 {
2879         struct compound_hdr hdr = {
2880                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2881         };
2882
2883         encode_compound_hdr(xdr, req, &hdr);
2884         encode_sequence(xdr, &args->seq_args, &hdr);
2885         encode_getdeviceinfo(xdr, args, &hdr);
2886
2887         /* set up reply kvec. Subtract notification bitmap max size (2)
2888          * so that notification bitmap is put in xdr_buf tail */
2889         xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2890                          args->pdev->pages, args->pdev->pgbase,
2891                          args->pdev->pglen);
2892
2893         encode_nops(&hdr);
2894 }
2895
2896 /*
2897  *  Encode LAYOUTGET request
2898  */
2899 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2900                                    struct xdr_stream *xdr,
2901                                    struct nfs4_layoutget_args *args)
2902 {
2903         struct compound_hdr hdr = {
2904                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2905         };
2906
2907         encode_compound_hdr(xdr, req, &hdr);
2908         encode_sequence(xdr, &args->seq_args, &hdr);
2909         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2910         encode_layoutget(xdr, args, &hdr);
2911
2912         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2913             args->layout.pages, 0, args->layout.pglen);
2914
2915         encode_nops(&hdr);
2916 }
2917
2918 /*
2919  *  Encode LAYOUTCOMMIT request
2920  */
2921 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2922                                       struct xdr_stream *xdr,
2923                                       struct nfs4_layoutcommit_args *args)
2924 {
2925         struct nfs4_layoutcommit_data *data =
2926                 container_of(args, struct nfs4_layoutcommit_data, args);
2927         struct compound_hdr hdr = {
2928                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2929         };
2930
2931         encode_compound_hdr(xdr, req, &hdr);
2932         encode_sequence(xdr, &args->seq_args, &hdr);
2933         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2934         encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2935         encode_getfattr(xdr, args->bitmask, &hdr);
2936         encode_nops(&hdr);
2937 }
2938
2939 /*
2940  * Encode LAYOUTRETURN request
2941  */
2942 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2943                                       struct xdr_stream *xdr,
2944                                       struct nfs4_layoutreturn_args *args)
2945 {
2946         struct compound_hdr hdr = {
2947                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2948         };
2949
2950         encode_compound_hdr(xdr, req, &hdr);
2951         encode_sequence(xdr, &args->seq_args, &hdr);
2952         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2953         encode_layoutreturn(xdr, args, &hdr);
2954         encode_nops(&hdr);
2955 }
2956
2957 /*
2958  * Encode SECINFO_NO_NAME request
2959  */
2960 static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
2961                                         struct xdr_stream *xdr,
2962                                         struct nfs41_secinfo_no_name_args *args)
2963 {
2964         struct compound_hdr hdr = {
2965                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2966         };
2967
2968         encode_compound_hdr(xdr, req, &hdr);
2969         encode_sequence(xdr, &args->seq_args, &hdr);
2970         encode_putrootfh(xdr, &hdr);
2971         encode_secinfo_no_name(xdr, args, &hdr);
2972         encode_nops(&hdr);
2973         return 0;
2974 }
2975
2976 /*
2977  *  Encode TEST_STATEID request
2978  */
2979 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
2980                                       struct xdr_stream *xdr,
2981                                       struct nfs41_test_stateid_args *args)
2982 {
2983         struct compound_hdr hdr = {
2984                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2985         };
2986
2987         encode_compound_hdr(xdr, req, &hdr);
2988         encode_sequence(xdr, &args->seq_args, &hdr);
2989         encode_test_stateid(xdr, args, &hdr);
2990         encode_nops(&hdr);
2991 }
2992
2993 /*
2994  *  Encode FREE_STATEID request
2995  */
2996 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
2997                                      struct xdr_stream *xdr,
2998                                      struct nfs41_free_stateid_args *args)
2999 {
3000         struct compound_hdr hdr = {
3001                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3002         };
3003
3004         encode_compound_hdr(xdr, req, &hdr);
3005         encode_sequence(xdr, &args->seq_args, &hdr);
3006         encode_free_stateid(xdr, args, &hdr);
3007         encode_nops(&hdr);
3008 }
3009 #endif /* CONFIG_NFS_V4_1 */
3010
3011 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
3012 {
3013         dprintk("nfs: %s: prematurely hit end of receive buffer. "
3014                 "Remaining buffer length is %tu words.\n",
3015                 func, xdr->end - xdr->p);
3016 }
3017
3018 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3019 {
3020         __be32 *p;
3021
3022         p = xdr_inline_decode(xdr, 4);
3023         if (unlikely(!p))
3024                 goto out_overflow;
3025         *len = be32_to_cpup(p);
3026         p = xdr_inline_decode(xdr, *len);
3027         if (unlikely(!p))
3028                 goto out_overflow;
3029         *string = (char *)p;
3030         return 0;
3031 out_overflow:
3032         print_overflow_msg(__func__, xdr);
3033         return -EIO;
3034 }
3035
3036 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3037 {
3038         __be32 *p;
3039
3040         p = xdr_inline_decode(xdr, 8);
3041         if (unlikely(!p))
3042                 goto out_overflow;
3043         hdr->status = be32_to_cpup(p++);
3044         hdr->taglen = be32_to_cpup(p);
3045
3046         p = xdr_inline_decode(xdr, hdr->taglen + 4);
3047         if (unlikely(!p))
3048                 goto out_overflow;
3049         hdr->tag = (char *)p;
3050         p += XDR_QUADLEN(hdr->taglen);
3051         hdr->nops = be32_to_cpup(p);
3052         if (unlikely(hdr->nops < 1))
3053                 return nfs4_stat_to_errno(hdr->status);
3054         return 0;
3055 out_overflow:
3056         print_overflow_msg(__func__, xdr);
3057         return -EIO;
3058 }
3059
3060 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3061 {
3062         __be32 *p;
3063         uint32_t opnum;
3064         int32_t nfserr;
3065
3066         p = xdr_inline_decode(xdr, 8);
3067         if (unlikely(!p))
3068                 goto out_overflow;
3069         opnum = be32_to_cpup(p++);
3070         if (opnum != expected) {
3071                 dprintk("nfs: Server returned operation"
3072                         " %d but we issued a request for %d\n",
3073                                 opnum, expected);
3074                 return -EIO;
3075         }
3076         nfserr = be32_to_cpup(p);
3077         if (nfserr != NFS_OK)
3078                 return nfs4_stat_to_errno(nfserr);
3079         return 0;
3080 out_overflow:
3081         print_overflow_msg(__func__, xdr);
3082         return -EIO;
3083 }
3084
3085 /* Dummy routine */
3086 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
3087 {
3088         __be32 *p;
3089         unsigned int strlen;
3090         char *str;
3091
3092         p = xdr_inline_decode(xdr, 12);
3093         if (likely(p))
3094                 return decode_opaque_inline(xdr, &strlen, &str);
3095         print_overflow_msg(__func__, xdr);
3096         return -EIO;
3097 }
3098
3099 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3100 {
3101         uint32_t bmlen;
3102         __be32 *p;
3103
3104         p = xdr_inline_decode(xdr, 4);
3105         if (unlikely(!p))
3106                 goto out_overflow;
3107         bmlen = be32_to_cpup(p);
3108
3109         bitmap[0] = bitmap[1] = bitmap[2] = 0;
3110         p = xdr_inline_decode(xdr, (bmlen << 2));
3111         if (unlikely(!p))
3112                 goto out_overflow;
3113         if (bmlen > 0) {
3114                 bitmap[0] = be32_to_cpup(p++);
3115                 if (bmlen > 1) {
3116                         bitmap[1] = be32_to_cpup(p++);
3117                         if (bmlen > 2)
3118                                 bitmap[2] = be32_to_cpup(p);
3119                 }
3120         }
3121         return 0;
3122 out_overflow:
3123         print_overflow_msg(__func__, xdr);
3124         return -EIO;
3125 }
3126
3127 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
3128 {
3129         __be32 *p;
3130
3131         p = xdr_inline_decode(xdr, 4);
3132         if (unlikely(!p))
3133                 goto out_overflow;
3134         *attrlen = be32_to_cpup(p);
3135         *savep = xdr->p;
3136         return 0;
3137 out_overflow:
3138         print_overflow_msg(__func__, xdr);
3139         return -EIO;
3140 }
3141
3142 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3143 {
3144         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3145                 int ret;
3146                 ret = decode_attr_bitmap(xdr, bitmask);
3147                 if (unlikely(ret < 0))
3148                         return ret;
3149                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3150         } else
3151                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3152         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3153                 bitmask[0], bitmask[1], bitmask[2]);
3154         return 0;
3155 }
3156
3157 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3158 {
3159         __be32 *p;
3160         int ret = 0;
3161
3162         *type = 0;
3163         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3164                 return -EIO;
3165         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3166                 p = xdr_inline_decode(xdr, 4);
3167                 if (unlikely(!p))
3168                         goto out_overflow;
3169                 *type = be32_to_cpup(p);
3170                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3171                         dprintk("%s: bad type %d\n", __func__, *type);
3172                         return -EIO;
3173                 }
3174                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3175                 ret = NFS_ATTR_FATTR_TYPE;
3176         }
3177         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3178         return ret;
3179 out_overflow:
3180         print_overflow_msg(__func__, xdr);
3181         return -EIO;
3182 }
3183
3184 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3185 {
3186         __be32 *p;
3187         int ret = 0;
3188
3189         *change = 0;
3190         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3191                 return -EIO;
3192         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3193                 p = xdr_inline_decode(xdr, 8);
3194                 if (unlikely(!p))
3195                         goto out_overflow;
3196                 xdr_decode_hyper(p, change);
3197                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3198                 ret = NFS_ATTR_FATTR_CHANGE;
3199         }
3200         dprintk("%s: change attribute=%Lu\n", __func__,
3201                         (unsigned long long)*change);
3202         return ret;
3203 out_overflow:
3204         print_overflow_msg(__func__, xdr);
3205         return -EIO;
3206 }
3207
3208 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3209 {
3210         __be32 *p;
3211         int ret = 0;
3212
3213         *size = 0;
3214         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3215                 return -EIO;
3216         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3217                 p = xdr_inline_decode(xdr, 8);
3218                 if (unlikely(!p))
3219                         goto out_overflow;
3220                 xdr_decode_hyper(p, size);
3221                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3222                 ret = NFS_ATTR_FATTR_SIZE;
3223         }
3224         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3225         return ret;
3226 out_overflow:
3227         print_overflow_msg(__func__, xdr);
3228         return -EIO;
3229 }
3230
3231 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3232 {
3233         __be32 *p;
3234
3235         *res = 0;
3236         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3237                 return -EIO;
3238         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3239                 p = xdr_inline_decode(xdr, 4);
3240                 if (unlikely(!p))
3241                         goto out_overflow;
3242                 *res = be32_to_cpup(p);
3243                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3244         }
3245         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3246         return 0;
3247 out_overflow:
3248         print_overflow_msg(__func__, xdr);
3249         return -EIO;
3250 }
3251
3252 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3253 {
3254         __be32 *p;
3255
3256         *res = 0;
3257         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3258                 return -EIO;
3259         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3260                 p = xdr_inline_decode(xdr, 4);
3261                 if (unlikely(!p))
3262                         goto out_overflow;
3263                 *res = be32_to_cpup(p);
3264                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3265         }
3266         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3267         return 0;
3268 out_overflow:
3269         print_overflow_msg(__func__, xdr);
3270         return -EIO;
3271 }
3272
3273 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3274 {
3275         __be32 *p;
3276         int ret = 0;
3277
3278         fsid->major = 0;
3279         fsid->minor = 0;
3280         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3281                 return -EIO;
3282         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3283                 p = xdr_inline_decode(xdr, 16);
3284                 if (unlikely(!p))
3285                         goto out_overflow;
3286                 p = xdr_decode_hyper(p, &fsid->major);
3287                 xdr_decode_hyper(p, &fsid->minor);
3288                 bitmap[0] &= ~FATTR4_WORD0_FSID;
3289                 ret = NFS_ATTR_FATTR_FSID;
3290         }
3291         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3292                         (unsigned long long)fsid->major,
3293                         (unsigned long long)fsid->minor);
3294         return ret;
3295 out_overflow:
3296         print_overflow_msg(__func__, xdr);
3297         return -EIO;
3298 }
3299
3300 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3301 {
3302         __be32 *p;
3303
3304         *res = 60;
3305         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3306                 return -EIO;
3307         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3308                 p = xdr_inline_decode(xdr, 4);
3309                 if (unlikely(!p))
3310                         goto out_overflow;
3311                 *res = be32_to_cpup(p);
3312                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3313         }
3314         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3315         return 0;
3316 out_overflow:
3317         print_overflow_msg(__func__, xdr);
3318         return -EIO;
3319 }
3320
3321 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3322 {
3323         __be32 *p;
3324
3325         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3326                 return -EIO;
3327         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3328                 p = xdr_inline_decode(xdr, 4);
3329                 if (unlikely(!p))
3330                         goto out_overflow;
3331                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3332                 *res = -be32_to_cpup(p);
3333         }
3334         return 0;
3335 out_overflow:
3336         print_overflow_msg(__func__, xdr);
3337         return -EIO;
3338 }
3339
3340 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3341 {
3342         __be32 *p;
3343         int len;
3344
3345         if (fh != NULL)
3346                 memset(fh, 0, sizeof(*fh));
3347
3348         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3349                 return -EIO;
3350         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3351                 p = xdr_inline_decode(xdr, 4);
3352                 if (unlikely(!p))
3353                         goto out_overflow;
3354                 len = be32_to_cpup(p);
3355                 if (len > NFS4_FHSIZE)
3356                         return -EIO;
3357                 p = xdr_inline_decode(xdr, len);
3358                 if (unlikely(!p))
3359                         goto out_overflow;
3360                 if (fh != NULL) {
3361                         memcpy(fh->data, p, len);
3362                         fh->size = len;
3363                 }
3364                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3365         }
3366         return 0;
3367 out_overflow:
3368         print_overflow_msg(__func__, xdr);
3369         return -EIO;
3370 }
3371
3372 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3373 {
3374         __be32 *p;
3375
3376         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
3377         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3378                 return -EIO;
3379         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3380                 p = xdr_inline_decode(xdr, 4);
3381                 if (unlikely(!p))
3382                         goto out_overflow;
3383                 *res = be32_to_cpup(p);
3384                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3385         }
3386         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3387         return 0;
3388 out_overflow:
3389         print_overflow_msg(__func__, xdr);
3390         return -EIO;
3391 }
3392
3393 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3394 {
3395         __be32 *p;
3396         int ret = 0;
3397
3398         *fileid = 0;
3399         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3400                 return -EIO;
3401         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3402                 p = xdr_inline_decode(xdr, 8);
3403                 if (unlikely(!p))
3404                         goto out_overflow;
3405                 xdr_decode_hyper(p, fileid);
3406                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3407                 ret = NFS_ATTR_FATTR_FILEID;
3408         }
3409         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3410         return ret;
3411 out_overflow:
3412         print_overflow_msg(__func__, xdr);
3413         return -EIO;
3414 }
3415
3416 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3417 {
3418         __be32 *p;
3419         int ret = 0;
3420
3421         *fileid = 0;
3422         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3423                 return -EIO;
3424         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3425                 p = xdr_inline_decode(xdr, 8);
3426                 if (unlikely(!p))
3427                         goto out_overflow;
3428                 xdr_decode_hyper(p, fileid);
3429                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3430                 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3431         }
3432         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3433         return ret;
3434 out_overflow:
3435         print_overflow_msg(__func__, xdr);
3436         return -EIO;
3437 }
3438
3439 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3440 {
3441         __be32 *p;
3442         int status = 0;
3443
3444         *res = 0;
3445         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3446                 return -EIO;
3447         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3448                 p = xdr_inline_decode(xdr, 8);
3449                 if (unlikely(!p))
3450                         goto out_overflow;
3451                 xdr_decode_hyper(p, res);
3452                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3453         }
3454         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3455         return status;
3456 out_overflow:
3457         print_overflow_msg(__func__, xdr);
3458         return -EIO;
3459 }
3460
3461 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3462 {
3463         __be32 *p;
3464         int status = 0;
3465
3466         *res = 0;
3467         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3468                 return -EIO;
3469         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3470                 p = xdr_inline_decode(xdr, 8);
3471                 if (unlikely(!p))
3472                         goto out_overflow;
3473                 xdr_decode_hyper(p, res);
3474                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3475         }
3476         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3477         return status;
3478 out_overflow:
3479         print_overflow_msg(__func__, xdr);
3480         return -EIO;
3481 }
3482
3483 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3484 {
3485         __be32 *p;
3486         int status = 0;
3487
3488         *res = 0;
3489         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3490                 return -EIO;
3491         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3492                 p = xdr_inline_decode(xdr, 8);
3493                 if (unlikely(!p))
3494                         goto out_overflow;
3495                 xdr_decode_hyper(p, res);
3496                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3497         }
3498         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3499         return status;
3500 out_overflow:
3501         print_overflow_msg(__func__, xdr);
3502         return -EIO;
3503 }
3504
3505 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3506 {
3507         u32 n;
3508         __be32 *p;
3509         int status = 0;
3510
3511         p = xdr_inline_decode(xdr, 4);
3512         if (unlikely(!p))
3513                 goto out_overflow;
3514         n = be32_to_cpup(p);
3515         if (n == 0)
3516                 goto root_path;
3517         dprintk("path ");
3518         path->ncomponents = 0;
3519         while (path->ncomponents < n) {
3520                 struct nfs4_string *component = &path->components[path->ncomponents];
3521                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3522                 if (unlikely(status != 0))
3523                         goto out_eio;
3524                 if (path->ncomponents != n)
3525                         dprintk("/");
3526                 dprintk("%s", component->data);
3527                 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
3528                         path->ncomponents++;
3529                 else {
3530                         dprintk("cannot parse %d components in path\n", n);
3531                         goto out_eio;
3532                 }
3533         }
3534 out:
3535         dprintk("\n");
3536         return status;
3537 root_path:
3538 /* a root pathname is sent as a zero component4 */
3539         path->ncomponents = 1;
3540         path->components[0].len=0;
3541         path->components[0].data=NULL;
3542         dprintk("path /\n");
3543         goto out;
3544 out_eio:
3545         dprintk(" status %d", status);
3546         status = -EIO;
3547         goto out;
3548 out_overflow:
3549         print_overflow_msg(__func__, xdr);
3550         return -EIO;
3551 }
3552
3553 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3554 {
3555         int n;
3556         __be32 *p;
3557         int status = -EIO;
3558
3559         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3560                 goto out;
3561         status = 0;
3562         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3563                 goto out;
3564         dprintk("%s: fsroot ", __func__);
3565         status = decode_pathname(xdr, &res->fs_path);
3566         if (unlikely(status != 0))
3567                 goto out;
3568         p = xdr_inline_decode(xdr, 4);
3569         if (unlikely(!p))
3570                 goto out_overflow;
3571         n = be32_to_cpup(p);
3572         if (n <= 0)
3573                 goto out_eio;
3574         res->nlocations = 0;
3575         while (res->nlocations < n) {
3576                 u32 m;
3577                 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
3578
3579                 p = xdr_inline_decode(xdr, 4);
3580                 if (unlikely(!p))
3581                         goto out_overflow;
3582                 m = be32_to_cpup(p);
3583
3584                 loc->nservers = 0;
3585                 dprintk("%s: servers ", __func__);
3586                 while (loc->nservers < m) {
3587                         struct nfs4_string *server = &loc->servers[loc->nservers];
3588                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3589                         if (unlikely(status != 0))
3590                                 goto out_eio;
3591                         dprintk("%s ", server->data);
3592                         if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
3593                                 loc->nservers++;
3594                         else {
3595                                 unsigned int i;
3596                                 dprintk("%s: using first %u of %u servers "
3597                                         "returned for location %u\n",
3598                                                 __func__,
3599                                                 NFS4_FS_LOCATION_MAXSERVERS,
3600                                                 m, res->nlocations);
3601                                 for (i = loc->nservers; i < m; i++) {
3602                                         unsigned int len;
3603                                         char *data;
3604                                         status = decode_opaque_inline(xdr, &len, &data);
3605                                         if (unlikely(status != 0))
3606                                                 goto out_eio;
3607                                 }
3608                         }
3609                 }
3610                 status = decode_pathname(xdr, &loc->rootpath);
3611                 if (unlikely(status != 0))
3612                         goto out_eio;
3613                 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
3614                         res->nlocations++;
3615         }
3616         if (res->nlocations != 0)
3617                 status = NFS_ATTR_FATTR_V4_REFERRAL;
3618 out:
3619         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3620         return status;
3621 out_overflow:
3622         print_overflow_msg(__func__, xdr);
3623 out_eio:
3624         status = -EIO;
3625         goto out;
3626 }
3627
3628 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3629 {
3630         __be32 *p;
3631         int status = 0;
3632
3633         *res = 0;
3634         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3635                 return -EIO;
3636         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3637                 p = xdr_inline_decode(xdr, 8);
3638                 if (unlikely(!p))
3639                         goto out_overflow;
3640                 xdr_decode_hyper(p, res);
3641                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3642         }
3643         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3644         return status;
3645 out_overflow:
3646         print_overflow_msg(__func__, xdr);
3647         return -EIO;
3648 }
3649
3650 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3651 {
3652         __be32 *p;
3653         int status = 0;
3654
3655         *maxlink = 1;
3656         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3657                 return -EIO;
3658         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3659                 p = xdr_inline_decode(xdr, 4);
3660                 if (unlikely(!p))
3661                         goto out_overflow;
3662                 *maxlink = be32_to_cpup(p);
3663                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3664         }
3665         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3666         return status;
3667 out_overflow:
3668         print_overflow_msg(__func__, xdr);
3669         return -EIO;
3670 }
3671
3672 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3673 {
3674         __be32 *p;
3675         int status = 0;
3676
3677         *maxname = 1024;
3678         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3679                 return -EIO;
3680         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3681                 p = xdr_inline_decode(xdr, 4);
3682                 if (unlikely(!p))
3683                         goto out_overflow;
3684                 *maxname = be32_to_cpup(p);
3685                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3686         }
3687         dprintk("%s: maxname=%u\n", __func__, *maxname);
3688         return status;
3689 out_overflow:
3690         print_overflow_msg(__func__, xdr);
3691         return -EIO;
3692 }
3693
3694 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3695 {
3696         __be32 *p;
3697         int status = 0;
3698
3699         *res = 1024;
3700         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3701                 return -EIO;
3702         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3703                 uint64_t maxread;
3704                 p = xdr_inline_decode(xdr, 8);
3705                 if (unlikely(!p))
3706                         goto out_overflow;
3707                 xdr_decode_hyper(p, &maxread);
3708                 if (maxread > 0x7FFFFFFF)
3709                         maxread = 0x7FFFFFFF;
3710                 *res = (uint32_t)maxread;
3711                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3712         }
3713         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3714         return status;
3715 out_overflow:
3716         print_overflow_msg(__func__, xdr);
3717         return -EIO;
3718 }
3719
3720 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3721 {
3722         __be32 *p;
3723         int status = 0;
3724
3725         *res = 1024;
3726         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3727                 return -EIO;
3728         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3729                 uint64_t maxwrite;
3730                 p = xdr_inline_decode(xdr, 8);
3731                 if (unlikely(!p))
3732                         goto out_overflow;
3733                 xdr_decode_hyper(p, &maxwrite);
3734                 if (maxwrite > 0x7FFFFFFF)
3735                         maxwrite = 0x7FFFFFFF;
3736                 *res = (uint32_t)maxwrite;
3737                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3738         }
3739         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3740         return status;
3741 out_overflow:
3742         print_overflow_msg(__func__, xdr);
3743         return -EIO;
3744 }
3745
3746 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3747 {
3748         uint32_t tmp;
3749         __be32 *p;
3750         int ret = 0;
3751
3752         *mode = 0;
3753         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3754                 return -EIO;
3755         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3756                 p = xdr_inline_decode(xdr, 4);
3757                 if (unlikely(!p))
3758                         goto out_overflow;
3759                 tmp = be32_to_cpup(p);
3760                 *mode = tmp & ~S_IFMT;
3761                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3762                 ret = NFS_ATTR_FATTR_MODE;
3763         }
3764         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3765         return ret;
3766 out_overflow:
3767         print_overflow_msg(__func__, xdr);
3768         return -EIO;
3769 }
3770
3771 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3772 {
3773         __be32 *p;
3774         int ret = 0;
3775
3776         *nlink = 1;
3777         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3778                 return -EIO;
3779         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3780                 p = xdr_inline_decode(xdr, 4);
3781                 if (unlikely(!p))
3782                         goto out_overflow;
3783                 *nlink = be32_to_cpup(p);
3784                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3785                 ret = NFS_ATTR_FATTR_NLINK;
3786         }
3787         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3788         return ret;
3789 out_overflow:
3790         print_overflow_msg(__func__, xdr);
3791         return -EIO;
3792 }
3793
3794 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3795                 const struct nfs_server *server, uint32_t *uid, int may_sleep)
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 (!may_sleep) {
3813                         /* do nothing */
3814                 } else if (len < XDR_MAX_NETOBJ) {
3815                         if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3816                                 ret = NFS_ATTR_FATTR_OWNER;
3817                         else
3818                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3819                                                 __func__);
3820                 } else
3821                         dprintk("%s: name too long (%u)!\n",
3822                                         __func__, len);
3823                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3824         }
3825         dprintk("%s: uid=%d\n", __func__, (int)*uid);
3826         return ret;
3827 out_overflow:
3828         print_overflow_msg(__func__, xdr);
3829         return -EIO;
3830 }
3831
3832 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3833                 const struct nfs_server *server, uint32_t *gid, int may_sleep)
3834 {
3835         uint32_t len;
3836         __be32 *p;
3837         int ret = 0;
3838
3839         *gid = -2;
3840         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3841                 return -EIO;
3842         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3843                 p = xdr_inline_decode(xdr, 4);
3844                 if (unlikely(!p))
3845                         goto out_overflow;
3846                 len = be32_to_cpup(p);
3847                 p = xdr_inline_decode(xdr, len);
3848                 if (unlikely(!p))
3849                         goto out_overflow;
3850                 if (!may_sleep) {
3851                         /* do nothing */
3852                 } else if (len < XDR_MAX_NETOBJ) {
3853                         if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3854                                 ret = NFS_ATTR_FATTR_GROUP;
3855                         else
3856                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3857                                                 __func__);
3858                 } else
3859                         dprintk("%s: name too long (%u)!\n",
3860                                         __func__, len);
3861                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3862         }
3863         dprintk("%s: gid=%d\n", __func__, (int)*gid);
3864         return ret;
3865 out_overflow:
3866         print_overflow_msg(__func__, xdr);
3867         return -EIO;
3868 }
3869
3870 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3871 {
3872         uint32_t major = 0, minor = 0;
3873         __be32 *p;
3874         int ret = 0;
3875
3876         *rdev = MKDEV(0,0);
3877         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3878                 return -EIO;
3879         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3880                 dev_t tmp;
3881
3882                 p = xdr_inline_decode(xdr, 8);
3883                 if (unlikely(!p))
3884                         goto out_overflow;
3885                 major = be32_to_cpup(p++);
3886                 minor = be32_to_cpup(p);
3887                 tmp = MKDEV(major, minor);
3888                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3889                         *rdev = tmp;
3890                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3891                 ret = NFS_ATTR_FATTR_RDEV;
3892         }
3893         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3894         return ret;
3895 out_overflow:
3896         print_overflow_msg(__func__, xdr);
3897         return -EIO;
3898 }
3899
3900 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3901 {
3902         __be32 *p;
3903         int status = 0;
3904
3905         *res = 0;
3906         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3907                 return -EIO;
3908         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3909                 p = xdr_inline_decode(xdr, 8);
3910                 if (unlikely(!p))
3911                         goto out_overflow;
3912                 xdr_decode_hyper(p, res);
3913                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3914         }
3915         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3916         return status;
3917 out_overflow:
3918         print_overflow_msg(__func__, xdr);
3919         return -EIO;
3920 }
3921
3922 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3923 {
3924         __be32 *p;
3925         int status = 0;
3926
3927         *res = 0;
3928         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3929                 return -EIO;
3930         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3931                 p = xdr_inline_decode(xdr, 8);
3932                 if (unlikely(!p))
3933                         goto out_overflow;
3934                 xdr_decode_hyper(p, res);
3935                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3936         }
3937         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3938         return status;
3939 out_overflow:
3940         print_overflow_msg(__func__, xdr);
3941         return -EIO;
3942 }
3943
3944 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3945 {
3946         __be32 *p;
3947         int status = 0;
3948
3949         *res = 0;
3950         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3951                 return -EIO;
3952         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3953                 p = xdr_inline_decode(xdr, 8);
3954                 if (unlikely(!p))
3955                         goto out_overflow;
3956                 xdr_decode_hyper(p, res);
3957                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3958         }
3959         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3960         return status;
3961 out_overflow:
3962         print_overflow_msg(__func__, xdr);
3963         return -EIO;
3964 }
3965
3966 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3967 {
3968         __be32 *p;
3969         int ret = 0;
3970
3971         *used = 0;
3972         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3973                 return -EIO;
3974         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3975                 p = xdr_inline_decode(xdr, 8);
3976                 if (unlikely(!p))
3977                         goto out_overflow;
3978                 xdr_decode_hyper(p, used);
3979                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3980                 ret = NFS_ATTR_FATTR_SPACE_USED;
3981         }
3982         dprintk("%s: space used=%Lu\n", __func__,
3983                         (unsigned long long)*used);
3984         return ret;
3985 out_overflow:
3986         print_overflow_msg(__func__, xdr);
3987         return -EIO;
3988 }
3989
3990 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
3991 {
3992         __be32 *p;
3993         uint64_t sec;
3994         uint32_t nsec;
3995
3996         p = xdr_inline_decode(xdr, 12);
3997         if (unlikely(!p))
3998                 goto out_overflow;
3999         p = xdr_decode_hyper(p, &sec);
4000         nsec = be32_to_cpup(p);
4001         time->tv_sec = (time_t)sec;
4002         time->tv_nsec = (long)nsec;
4003         return 0;
4004 out_overflow:
4005         print_overflow_msg(__func__, xdr);
4006         return -EIO;
4007 }
4008
4009 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4010 {
4011         int status = 0;
4012
4013         time->tv_sec = 0;
4014         time->tv_nsec = 0;
4015         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4016                 return -EIO;
4017         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4018                 status = decode_attr_time(xdr, time);
4019                 if (status == 0)
4020                         status = NFS_ATTR_FATTR_ATIME;
4021                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4022         }
4023         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4024         return status;
4025 }
4026
4027 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4028 {
4029         int status = 0;
4030
4031         time->tv_sec = 0;
4032         time->tv_nsec = 0;
4033         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4034                 return -EIO;
4035         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4036                 status = decode_attr_time(xdr, time);
4037                 if (status == 0)
4038                         status = NFS_ATTR_FATTR_CTIME;
4039                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4040         }
4041         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4042         return status;
4043 }
4044
4045 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4046                                   struct timespec *time)
4047 {
4048         int status = 0;
4049
4050         time->tv_sec = 0;
4051         time->tv_nsec = 0;
4052         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4053                 return -EIO;
4054         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4055                 status = decode_attr_time(xdr, time);
4056                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4057         }
4058         dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4059                 (long)time->tv_nsec);
4060         return status;
4061 }
4062
4063 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4064 {
4065         int status = 0;
4066
4067         time->tv_sec = 0;
4068         time->tv_nsec = 0;
4069         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4070                 return -EIO;
4071         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4072                 status = decode_attr_time(xdr, time);
4073                 if (status == 0)
4074                         status = NFS_ATTR_FATTR_MTIME;
4075                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4076         }
4077         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4078         return status;
4079 }
4080
4081 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
4082 {
4083         unsigned int attrwords = XDR_QUADLEN(attrlen);
4084         unsigned int nwords = xdr->p - savep;
4085
4086         if (unlikely(attrwords != nwords)) {
4087                 dprintk("%s: server returned incorrect attribute length: "
4088                         "%u %c %u\n",
4089                                 __func__,
4090                                 attrwords << 2,
4091                                 (attrwords < nwords) ? '<' : '>',
4092                                 nwords << 2);
4093                 return -EIO;
4094         }
4095         return 0;
4096 }
4097
4098 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4099 {
4100         __be32 *p;
4101
4102         p = xdr_inline_decode(xdr, 20);
4103         if (unlikely(!p))
4104                 goto out_overflow;
4105         cinfo->atomic = be32_to_cpup(p++);
4106         p = xdr_decode_hyper(p, &cinfo->before);
4107         xdr_decode_hyper(p, &cinfo->after);
4108         return 0;
4109 out_overflow:
4110         print_overflow_msg(__func__, xdr);
4111         return -EIO;
4112 }
4113
4114 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
4115 {
4116         __be32 *p;
4117         uint32_t supp, acc;
4118         int status;
4119
4120         status = decode_op_hdr(xdr, OP_ACCESS);
4121         if (status)
4122                 return status;
4123         p = xdr_inline_decode(xdr, 8);
4124         if (unlikely(!p))
4125                 goto out_overflow;
4126         supp = be32_to_cpup(p++);
4127         acc = be32_to_cpup(p);
4128         access->supported = supp;
4129         access->access = acc;
4130         return 0;
4131 out_overflow:
4132         print_overflow_msg(__func__, xdr);
4133         return -EIO;
4134 }
4135
4136 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4137 {
4138         __be32 *p;
4139
4140         p = xdr_inline_decode(xdr, len);
4141         if (likely(p)) {
4142                 memcpy(buf, p, len);
4143                 return 0;
4144         }
4145         print_overflow_msg(__func__, xdr);
4146         return -EIO;
4147 }
4148
4149 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4150 {
4151         return decode_opaque_fixed(xdr, stateid->data, NFS4_STATEID_SIZE);
4152 }
4153
4154 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4155 {
4156         int status;
4157
4158         status = decode_op_hdr(xdr, OP_CLOSE);
4159         if (status != -EIO)
4160                 nfs_increment_open_seqid(status, res->seqid);
4161         if (!status)
4162                 status = decode_stateid(xdr, &res->stateid);
4163         return status;
4164 }
4165
4166 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4167 {
4168         return decode_opaque_fixed(xdr, verifier, 8);
4169 }
4170
4171 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
4172 {
4173         int status;
4174
4175         status = decode_op_hdr(xdr, OP_COMMIT);
4176         if (!status)
4177                 status = decode_verifier(xdr, res->verf->verifier);
4178         return status;
4179 }
4180
4181 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4182 {
4183         __be32 *p;
4184         uint32_t bmlen;
4185         int status;
4186
4187         status = decode_op_hdr(xdr, OP_CREATE);
4188         if (status)
4189                 return status;
4190         if ((status = decode_change_info(xdr, cinfo)))
4191                 return status;
4192         p = xdr_inline_decode(xdr, 4);
4193         if (unlikely(!p))
4194                 goto out_overflow;
4195         bmlen = be32_to_cpup(p);
4196         p = xdr_inline_decode(xdr, bmlen << 2);
4197         if (likely(p))
4198                 return 0;
4199 out_overflow:
4200         print_overflow_msg(__func__, xdr);
4201         return -EIO;
4202 }
4203
4204 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4205 {
4206         __be32 *savep;
4207         uint32_t attrlen, bitmap[3] = {0};
4208         int status;
4209
4210         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4211                 goto xdr_error;
4212         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4213                 goto xdr_error;
4214         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4215                 goto xdr_error;
4216         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4217                 goto xdr_error;
4218         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4219                 goto xdr_error;
4220         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4221                 goto xdr_error;
4222         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4223                 goto xdr_error;
4224         status = verify_attr_len(xdr, savep, attrlen);
4225 xdr_error:
4226         dprintk("%s: xdr returned %d!\n", __func__, -status);
4227         return status;
4228 }
4229
4230 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4231 {
4232         __be32 *savep;
4233         uint32_t attrlen, bitmap[3] = {0};
4234         int status;
4235
4236         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4237                 goto xdr_error;
4238         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4239                 goto xdr_error;
4240         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4241                 goto xdr_error;
4242
4243         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4244                 goto xdr_error;
4245         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4246                 goto xdr_error;
4247         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4248                 goto xdr_error;
4249         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4250                 goto xdr_error;
4251         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4252                 goto xdr_error;
4253         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4254                 goto xdr_error;
4255
4256         status = verify_attr_len(xdr, savep, attrlen);
4257 xdr_error:
4258         dprintk("%s: xdr returned %d!\n", __func__, -status);
4259         return status;
4260 }
4261
4262 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4263 {
4264         __be32 *savep;
4265         uint32_t attrlen, bitmap[3] = {0};
4266         int status;
4267
4268         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4269                 goto xdr_error;
4270         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4271                 goto xdr_error;
4272         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4273                 goto xdr_error;
4274
4275         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4276                 goto xdr_error;
4277         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4278                 goto xdr_error;
4279
4280         status = verify_attr_len(xdr, savep, attrlen);
4281 xdr_error:
4282         dprintk("%s: xdr returned %d!\n", __func__, -status);
4283         return status;
4284 }
4285
4286 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4287                 struct nfs_fattr *fattr, struct nfs_fh *fh,
4288                 const struct nfs_server *server, int may_sleep)
4289 {
4290         int status;
4291         umode_t fmode = 0;
4292         uint32_t type;
4293         int32_t err;
4294
4295         status = decode_attr_type(xdr, bitmap, &type);
4296         if (status < 0)
4297                 goto xdr_error;
4298         fattr->mode = 0;
4299         if (status != 0) {
4300                 fattr->mode |= nfs_type2fmt[type];
4301                 fattr->valid |= status;
4302         }
4303
4304         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4305         if (status < 0)
4306                 goto xdr_error;
4307         fattr->valid |= status;
4308
4309         status = decode_attr_size(xdr, bitmap, &fattr->size);
4310         if (status < 0)
4311                 goto xdr_error;
4312         fattr->valid |= status;
4313
4314         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4315         if (status < 0)
4316                 goto xdr_error;
4317         fattr->valid |= status;
4318
4319         err = 0;
4320         status = decode_attr_error(xdr, bitmap, &err);
4321         if (status < 0)
4322                 goto xdr_error;
4323         if (err == -NFS4ERR_WRONGSEC)
4324                 nfs_fixup_secinfo_attributes(fattr, fh);
4325
4326         status = decode_attr_filehandle(xdr, bitmap, fh);
4327         if (status < 0)
4328                 goto xdr_error;
4329
4330         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4331         if (status < 0)
4332                 goto xdr_error;
4333         fattr->valid |= status;
4334
4335         status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
4336                                                 struct nfs4_fs_locations,
4337                                                 fattr));
4338         if (status < 0)
4339                 goto xdr_error;
4340         fattr->valid |= status;
4341
4342         status = decode_attr_mode(xdr, bitmap, &fmode);
4343         if (status < 0)
4344                 goto xdr_error;
4345         if (status != 0) {
4346                 fattr->mode |= fmode;
4347                 fattr->valid |= status;
4348         }
4349
4350         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4351         if (status < 0)
4352                 goto xdr_error;
4353         fattr->valid |= status;
4354
4355         status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, may_sleep);
4356         if (status < 0)
4357                 goto xdr_error;
4358         fattr->valid |= status;
4359
4360         status = decode_attr_group(xdr, bitmap, server, &fattr->gid, may_sleep);
4361         if (status < 0)
4362                 goto xdr_error;
4363         fattr->valid |= status;
4364
4365         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4366         if (status < 0)
4367                 goto xdr_error;
4368         fattr->valid |= status;
4369
4370         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4371         if (status < 0)
4372                 goto xdr_error;
4373         fattr->valid |= status;
4374
4375         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4376         if (status < 0)
4377                 goto xdr_error;
4378         fattr->valid |= status;
4379
4380         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4381         if (status < 0)
4382                 goto xdr_error;
4383         fattr->valid |= status;
4384
4385         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4386         if (status < 0)
4387                 goto xdr_error;
4388         fattr->valid |= status;
4389
4390         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4391         if (status < 0)
4392                 goto xdr_error;
4393         fattr->valid |= status;
4394
4395 xdr_error:
4396         dprintk("%s: xdr returned %d\n", __func__, -status);
4397         return status;
4398 }
4399
4400 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4401                 struct nfs_fh *fh, const struct nfs_server *server, int may_sleep)
4402 {
4403         __be32 *savep;
4404         uint32_t attrlen,
4405                  bitmap[3] = {0};
4406         int status;
4407
4408         status = decode_op_hdr(xdr, OP_GETATTR);
4409         if (status < 0)
4410                 goto xdr_error;
4411
4412         status = decode_attr_bitmap(xdr, bitmap);
4413         if (status < 0)
4414                 goto xdr_error;
4415
4416         status = decode_attr_length(xdr, &attrlen, &savep);
4417         if (status < 0)
4418                 goto xdr_error;
4419
4420         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, server, may_sleep);
4421         if (status < 0)
4422                 goto xdr_error;
4423
4424         status = verify_attr_len(xdr, savep, attrlen);
4425 xdr_error:
4426         dprintk("%s: xdr returned %d\n", __func__, -status);
4427         return status;
4428 }
4429
4430 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4431                 const struct nfs_server *server, int may_sleep)
4432 {
4433         return decode_getfattr_generic(xdr, fattr, NULL, server, may_sleep);
4434 }
4435
4436 /*
4437  * Decode potentially multiple layout types. Currently we only support
4438  * one layout driver per file system.
4439  */
4440 static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4441                                          uint32_t *layouttype)
4442 {
4443         uint32_t *p;
4444         int num;
4445
4446         p = xdr_inline_decode(xdr, 4);
4447         if (unlikely(!p))
4448                 goto out_overflow;
4449         num = be32_to_cpup(p);
4450
4451         /* pNFS is not supported by the underlying file system */
4452         if (num == 0) {
4453                 *layouttype = 0;
4454                 return 0;
4455         }
4456         if (num > 1)
4457                 printk(KERN_INFO "%s: Warning: Multiple pNFS layout drivers "
4458                         "per filesystem not supported\n", __func__);
4459
4460         /* Decode and set first layout type, move xdr->p past unused types */
4461         p = xdr_inline_decode(xdr, num * 4);
4462         if (unlikely(!p))
4463                 goto out_overflow;
4464         *layouttype = be32_to_cpup(p);
4465         return 0;
4466 out_overflow:
4467         print_overflow_msg(__func__, xdr);
4468         return -EIO;
4469 }
4470
4471 /*
4472  * The type of file system exported.
4473  * Note we must ensure that layouttype is set in any non-error case.
4474  */
4475 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4476                                 uint32_t *layouttype)
4477 {
4478         int status = 0;
4479
4480         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4481         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4482                 return -EIO;
4483         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4484                 status = decode_first_pnfs_layout_type(xdr, layouttype);
4485                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4486         } else
4487                 *layouttype = 0;
4488         return status;
4489 }
4490
4491 /*
4492  * The prefered block size for layout directed io
4493  */
4494 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4495                                       uint32_t *res)
4496 {
4497         __be32 *p;
4498
4499         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4500         *res = 0;
4501         if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4502                 p = xdr_inline_decode(xdr, 4);
4503                 if (unlikely(!p)) {
4504                         print_overflow_msg(__func__, xdr);
4505                         return -EIO;
4506                 }
4507                 *res = be32_to_cpup(p);
4508                 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4509         }
4510         return 0;
4511 }
4512
4513 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4514 {
4515         __be32 *savep;
4516         uint32_t attrlen, bitmap[3];
4517         int status;
4518
4519         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4520                 goto xdr_error;
4521         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4522                 goto xdr_error;
4523         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4524                 goto xdr_error;
4525
4526         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4527
4528         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4529                 goto xdr_error;
4530         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4531                 goto xdr_error;
4532         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4533                 goto xdr_error;
4534         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4535         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4536                 goto xdr_error;
4537         fsinfo->wtpref = fsinfo->wtmax;
4538         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4539         if (status != 0)
4540                 goto xdr_error;
4541         status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4542         if (status != 0)
4543                 goto xdr_error;
4544         status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4545         if (status)
4546                 goto xdr_error;
4547
4548         status = verify_attr_len(xdr, savep, attrlen);
4549 xdr_error:
4550         dprintk("%s: xdr returned %d!\n", __func__, -status);
4551         return status;
4552 }
4553
4554 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4555 {
4556         __be32 *p;
4557         uint32_t len;
4558         int status;
4559
4560         /* Zero handle first to allow comparisons */
4561         memset(fh, 0, sizeof(*fh));
4562
4563         status = decode_op_hdr(xdr, OP_GETFH);
4564         if (status)
4565                 return status;
4566
4567         p = xdr_inline_decode(xdr, 4);
4568         if (unlikely(!p))
4569                 goto out_overflow;
4570         len = be32_to_cpup(p);
4571         if (len > NFS4_FHSIZE)
4572                 return -EIO;
4573         fh->size = len;
4574         p = xdr_inline_decode(xdr, len);
4575         if (unlikely(!p))
4576                 goto out_overflow;
4577         memcpy(fh->data, p, len);
4578         return 0;
4579 out_overflow:
4580         print_overflow_msg(__func__, xdr);
4581         return -EIO;
4582 }
4583
4584 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4585 {
4586         int status;
4587
4588         status = decode_op_hdr(xdr, OP_LINK);
4589         if (status)
4590                 return status;
4591         return decode_change_info(xdr, cinfo);
4592 }
4593
4594 /*
4595  * We create the owner, so we know a proper owner.id length is 4.
4596  */
4597 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4598 {
4599         uint64_t offset, length, clientid;
4600         __be32 *p;
4601         uint32_t namelen, type;
4602
4603         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4604         if (unlikely(!p))
4605                 goto out_overflow;
4606         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4607         p = xdr_decode_hyper(p, &length);
4608         type = be32_to_cpup(p++); /* 4 byte read */
4609         if (fl != NULL) { /* manipulate file lock */
4610                 fl->fl_start = (loff_t)offset;
4611                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4612                 if (length == ~(uint64_t)0)
4613                         fl->fl_end = OFFSET_MAX;
4614                 fl->fl_type = F_WRLCK;
4615                 if (type & 1)
4616                         fl->fl_type = F_RDLCK;
4617                 fl->fl_pid = 0;
4618         }
4619         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4620         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4621         p = xdr_inline_decode(xdr, namelen); /* variable size field */
4622         if (likely(p))
4623                 return -NFS4ERR_DENIED;
4624 out_overflow:
4625         print_overflow_msg(__func__, xdr);
4626         return -EIO;
4627 }
4628
4629 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4630 {
4631         int status;
4632
4633         status = decode_op_hdr(xdr, OP_LOCK);
4634         if (status == -EIO)
4635                 goto out;
4636         if (status == 0) {
4637                 status = decode_stateid(xdr, &res->stateid);
4638                 if (unlikely(status))
4639                         goto out;
4640         } else if (status == -NFS4ERR_DENIED)
4641                 status = decode_lock_denied(xdr, NULL);
4642         if (res->open_seqid != NULL)
4643                 nfs_increment_open_seqid(status, res->open_seqid);
4644         nfs_increment_lock_seqid(status, res->lock_seqid);
4645 out:
4646         return status;
4647 }
4648
4649 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4650 {
4651         int status;
4652         status = decode_op_hdr(xdr, OP_LOCKT);
4653         if (status == -NFS4ERR_DENIED)
4654                 return decode_lock_denied(xdr, res->denied);
4655         return status;
4656 }
4657
4658 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4659 {
4660         int status;
4661
4662         status = decode_op_hdr(xdr, OP_LOCKU);
4663         if (status != -EIO)
4664                 nfs_increment_lock_seqid(status, res->seqid);
4665         if (status == 0)
4666                 status = decode_stateid(xdr, &res->stateid);
4667         return status;
4668 }
4669
4670 static int decode_release_lockowner(struct xdr_stream *xdr)
4671 {
4672         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4673 }
4674
4675 static int decode_lookup(struct xdr_stream *xdr)
4676 {
4677         return decode_op_hdr(xdr, OP_LOOKUP);
4678 }
4679
4680 /* This is too sick! */
4681 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4682 {
4683         __be32 *p;
4684         uint32_t limit_type, nblocks, blocksize;
4685
4686         p = xdr_inline_decode(xdr, 12);
4687         if (unlikely(!p))
4688                 goto out_overflow;
4689         limit_type = be32_to_cpup(p++);
4690         switch (limit_type) {
4691         case 1:
4692                 xdr_decode_hyper(p, maxsize);
4693                 break;
4694         case 2:
4695                 nblocks = be32_to_cpup(p++);
4696                 blocksize = be32_to_cpup(p);
4697                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4698         }
4699         return 0;
4700 out_overflow:
4701         print_overflow_msg(__func__, xdr);
4702         return -EIO;
4703 }
4704
4705 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4706 {
4707         __be32 *p;
4708         uint32_t delegation_type;
4709         int status;
4710
4711         p = xdr_inline_decode(xdr, 4);
4712         if (unlikely(!p))
4713                 goto out_overflow;
4714         delegation_type = be32_to_cpup(p);
4715         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4716                 res->delegation_type = 0;
4717                 return 0;
4718         }
4719         status = decode_stateid(xdr, &res->delegation);
4720         if (unlikely(status))
4721                 return status;
4722         p = xdr_inline_decode(xdr, 4);
4723         if (unlikely(!p))
4724                 goto out_overflow;
4725         res->do_recall = be32_to_cpup(p);
4726
4727         switch (delegation_type) {
4728         case NFS4_OPEN_DELEGATE_READ:
4729                 res->delegation_type = FMODE_READ;
4730                 break;
4731         case NFS4_OPEN_DELEGATE_WRITE:
4732                 res->delegation_type = FMODE_WRITE|FMODE_READ;
4733                 if (decode_space_limit(xdr, &res->maxsize) < 0)
4734                                 return -EIO;
4735         }
4736         return decode_ace(xdr, NULL, res->server->nfs_client);
4737 out_overflow:
4738         print_overflow_msg(__func__, xdr);
4739         return -EIO;
4740 }
4741
4742 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
4743 {
4744         __be32 *p;
4745         uint32_t savewords, bmlen, i;
4746         int status;
4747
4748         status = decode_op_hdr(xdr, OP_OPEN);
4749         if (status != -EIO)
4750                 nfs_increment_open_seqid(status, res->seqid);
4751         if (!status)
4752                 status = decode_stateid(xdr, &res->stateid);
4753         if (unlikely(status))
4754                 return status;
4755
4756         decode_change_info(xdr, &res->cinfo);
4757
4758         p = xdr_inline_decode(xdr, 8);
4759         if (unlikely(!p))
4760                 goto out_overflow;
4761         res->rflags = be32_to_cpup(p++);
4762         bmlen = be32_to_cpup(p);
4763         if (bmlen > 10)
4764                 goto xdr_error;
4765
4766         p = xdr_inline_decode(xdr, bmlen << 2);
4767         if (unlikely(!p))
4768                 goto out_overflow;
4769         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
4770         for (i = 0; i < savewords; ++i)
4771                 res->attrset[i] = be32_to_cpup(p++);
4772         for (; i < NFS4_BITMAP_SIZE; i++)
4773                 res->attrset[i] = 0;
4774
4775         return decode_delegation(xdr, res);
4776 xdr_error:
4777         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
4778         return -EIO;
4779 out_overflow:
4780         print_overflow_msg(__func__, xdr);
4781         return -EIO;
4782 }
4783
4784 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
4785 {
4786         int status;
4787
4788         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
4789         if (status != -EIO)
4790                 nfs_increment_open_seqid(status, res->seqid);
4791         if (!status)
4792                 status = decode_stateid(xdr, &res->stateid);
4793         return status;
4794 }
4795
4796 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
4797 {
4798         int status;
4799
4800         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
4801         if (status != -EIO)
4802                 nfs_increment_open_seqid(status, res->seqid);
4803         if (!status)
4804                 status = decode_stateid(xdr, &res->stateid);
4805         return status;
4806 }
4807
4808 static int decode_putfh(struct xdr_stream *xdr)
4809 {
4810         return decode_op_hdr(xdr, OP_PUTFH);
4811 }
4812
4813 static int decode_putrootfh(struct xdr_stream *xdr)
4814 {
4815         return decode_op_hdr(xdr, OP_PUTROOTFH);
4816 }
4817
4818 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
4819 {
4820         struct kvec *iov = req->rq_rcv_buf.head;
4821         __be32 *p;
4822         uint32_t count, eof, recvd, hdrlen;
4823         int status;
4824
4825         status = decode_op_hdr(xdr, OP_READ);
4826         if (status)
4827                 return status;
4828         p = xdr_inline_decode(xdr, 8);
4829         if (unlikely(!p))
4830                 goto out_overflow;
4831         eof = be32_to_cpup(p++);
4832         count = be32_to_cpup(p);
4833         hdrlen = (u8 *) xdr->p - (u8 *) iov->iov_base;
4834         recvd = req->rq_rcv_buf.len - hdrlen;
4835         if (count > recvd) {
4836                 dprintk("NFS: server cheating in read reply: "
4837                                 "count %u > recvd %u\n", count, recvd);
4838                 count = recvd;
4839                 eof = 0;
4840         }
4841         xdr_read_pages(xdr, count);
4842         res->eof = eof;
4843         res->count = count;
4844         return 0;
4845 out_overflow:
4846         print_overflow_msg(__func__, xdr);
4847         return -EIO;
4848 }
4849
4850 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
4851 {
4852         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
4853         struct kvec     *iov = rcvbuf->head;
4854         size_t          hdrlen;
4855         u32             recvd, pglen = rcvbuf->page_len;
4856         int             status;
4857
4858         status = decode_op_hdr(xdr, OP_READDIR);
4859         if (!status)
4860                 status = decode_verifier(xdr, readdir->verifier.data);
4861         if (unlikely(status))
4862                 return status;
4863         dprintk("%s: verifier = %08x:%08x\n",
4864                         __func__,
4865                         ((u32 *)readdir->verifier.data)[0],
4866                         ((u32 *)readdir->verifier.data)[1]);
4867
4868
4869         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4870         recvd = rcvbuf->len - hdrlen;
4871         if (pglen > recvd)
4872                 pglen = recvd;
4873         xdr_read_pages(xdr, pglen);
4874
4875
4876         return pglen;
4877 }
4878
4879 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
4880 {
4881         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4882         struct kvec *iov = rcvbuf->head;
4883         size_t hdrlen;
4884         u32 len, recvd;
4885         __be32 *p;
4886         int status;
4887
4888         status = decode_op_hdr(xdr, OP_READLINK);
4889         if (status)
4890                 return status;
4891
4892         /* Convert length of symlink */
4893         p = xdr_inline_decode(xdr, 4);
4894         if (unlikely(!p))
4895                 goto out_overflow;
4896         len = be32_to_cpup(p);
4897         if (len >= rcvbuf->page_len || len <= 0) {
4898                 dprintk("nfs: server returned giant symlink!\n");
4899                 return -ENAMETOOLONG;
4900         }
4901         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4902         recvd = req->rq_rcv_buf.len - hdrlen;
4903         if (recvd < len) {
4904                 dprintk("NFS: server cheating in readlink reply: "
4905                                 "count %u > recvd %u\n", len, recvd);
4906                 return -EIO;
4907         }
4908         xdr_read_pages(xdr, len);
4909         /*
4910          * The XDR encode routine has set things up so that
4911          * the link text will be copied directly into the
4912          * buffer.  We just have to do overflow-checking,
4913          * and and null-terminate the text (the VFS expects
4914          * null-termination).
4915          */
4916         xdr_terminate_string(rcvbuf, len);
4917         return 0;
4918 out_overflow:
4919         print_overflow_msg(__func__, xdr);
4920         return -EIO;
4921 }
4922
4923 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4924 {
4925         int status;
4926
4927         status = decode_op_hdr(xdr, OP_REMOVE);
4928         if (status)
4929                 goto out;
4930         status = decode_change_info(xdr, cinfo);
4931 out:
4932         return status;
4933 }
4934
4935 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
4936               struct nfs4_change_info *new_cinfo)
4937 {
4938         int status;
4939
4940         status = decode_op_hdr(xdr, OP_RENAME);
4941         if (status)
4942                 goto out;
4943         if ((status = decode_change_info(xdr, old_cinfo)))
4944                 goto out;
4945         status = decode_change_info(xdr, new_cinfo);
4946 out:
4947         return status;
4948 }
4949
4950 static int decode_renew(struct xdr_stream *xdr)
4951 {
4952         return decode_op_hdr(xdr, OP_RENEW);
4953 }
4954
4955 static int
4956 decode_restorefh(struct xdr_stream *xdr)
4957 {
4958         return decode_op_hdr(xdr, OP_RESTOREFH);
4959 }
4960
4961 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
4962                          struct nfs_getaclres *res)
4963 {
4964         __be32 *savep, *bm_p;
4965         uint32_t attrlen,
4966                  bitmap[3] = {0};
4967         struct kvec *iov = req->rq_rcv_buf.head;
4968         int status;
4969
4970         res->acl_len = 0;
4971         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4972                 goto out;
4973         bm_p = xdr->p;
4974         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4975                 goto out;
4976         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4977                 goto out;
4978
4979         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
4980                 return -EIO;
4981         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
4982                 size_t hdrlen;
4983                 u32 recvd;
4984
4985                 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
4986                  * are stored with the acl data to handle the problem of
4987                  * variable length bitmaps.*/
4988                 xdr->p = bm_p;
4989                 res->acl_data_offset = be32_to_cpup(bm_p) + 2;
4990                 res->acl_data_offset <<= 2;
4991
4992                 /* We ignore &savep and don't do consistency checks on
4993                  * the attr length.  Let userspace figure it out.... */
4994                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
4995                 attrlen += res->acl_data_offset;
4996                 recvd = req->rq_rcv_buf.len - hdrlen;
4997                 if (attrlen > recvd) {
4998                         if (res->acl_flags & NFS4_ACL_LEN_REQUEST) {
4999                                 /* getxattr interface called with a NULL buf */
5000                                 res->acl_len = attrlen;
5001                                 goto out;
5002                         }
5003                         dprintk("NFS: acl reply: attrlen %u > recvd %u\n",
5004                                         attrlen, recvd);
5005                         return -EINVAL;
5006                 }
5007                 xdr_read_pages(xdr, attrlen);
5008                 res->acl_len = attrlen;
5009         } else
5010                 status = -EOPNOTSUPP;
5011
5012 out:
5013         return status;
5014 }
5015
5016 static int
5017 decode_savefh(struct xdr_stream *xdr)
5018 {
5019         return decode_op_hdr(xdr, OP_SAVEFH);
5020 }
5021
5022 static int decode_setattr(struct xdr_stream *xdr)
5023 {
5024         __be32 *p;
5025         uint32_t bmlen;
5026         int status;
5027
5028         status = decode_op_hdr(xdr, OP_SETATTR);
5029         if (status)
5030                 return status;
5031         p = xdr_inline_decode(xdr, 4);
5032         if (unlikely(!p))
5033                 goto out_overflow;
5034         bmlen = be32_to_cpup(p);
5035         p = xdr_inline_decode(xdr, bmlen << 2);
5036         if (likely(p))
5037                 return 0;
5038 out_overflow:
5039         print_overflow_msg(__func__, xdr);
5040         return -EIO;
5041 }
5042
5043 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5044 {
5045         __be32 *p;
5046         uint32_t opnum;
5047         int32_t nfserr;
5048
5049         p = xdr_inline_decode(xdr, 8);
5050         if (unlikely(!p))
5051                 goto out_overflow;
5052         opnum = be32_to_cpup(p++);
5053         if (opnum != OP_SETCLIENTID) {
5054                 dprintk("nfs: decode_setclientid: Server returned operation"
5055                         " %d\n", opnum);
5056                 return -EIO;
5057         }
5058         nfserr = be32_to_cpup(p);
5059         if (nfserr == NFS_OK) {
5060                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5061                 if (unlikely(!p))
5062                         goto out_overflow;
5063                 p = xdr_decode_hyper(p, &res->clientid);
5064                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5065         } else if (nfserr == NFSERR_CLID_INUSE) {
5066                 uint32_t len;
5067
5068                 /* skip netid string */
5069                 p = xdr_inline_decode(xdr, 4);
5070                 if (unlikely(!p))
5071                         goto out_overflow;
5072                 len = be32_to_cpup(p);
5073                 p = xdr_inline_decode(xdr, len);
5074                 if (unlikely(!p))
5075                         goto out_overflow;
5076
5077                 /* skip uaddr 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                 return -NFSERR_CLID_INUSE;
5086         } else
5087                 return nfs4_stat_to_errno(nfserr);
5088
5089         return 0;
5090 out_overflow:
5091         print_overflow_msg(__func__, xdr);
5092         return -EIO;
5093 }
5094
5095 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5096 {
5097         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5098 }
5099
5100 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
5101 {
5102         __be32 *p;
5103         int status;
5104
5105         status = decode_op_hdr(xdr, OP_WRITE);
5106         if (status)
5107                 return status;
5108
5109         p = xdr_inline_decode(xdr, 16);
5110         if (unlikely(!p))
5111                 goto out_overflow;
5112         res->count = be32_to_cpup(p++);
5113         res->verf->committed = be32_to_cpup(p++);
5114         memcpy(res->verf->verifier, p, 8);
5115         return 0;
5116 out_overflow:
5117         print_overflow_msg(__func__, xdr);
5118         return -EIO;
5119 }
5120
5121 static int decode_delegreturn(struct xdr_stream *xdr)
5122 {
5123         return decode_op_hdr(xdr, OP_DELEGRETURN);
5124 }
5125
5126 static int decode_secinfo_gss(struct xdr_stream *xdr, struct nfs4_secinfo_flavor *flavor)
5127 {
5128         __be32 *p;
5129
5130         p = xdr_inline_decode(xdr, 4);
5131         if (unlikely(!p))
5132                 goto out_overflow;
5133         flavor->gss.sec_oid4.len = be32_to_cpup(p);
5134         if (flavor->gss.sec_oid4.len > GSS_OID_MAX_LEN)
5135                 goto out_err;
5136
5137         p = xdr_inline_decode(xdr, flavor->gss.sec_oid4.len);
5138         if (unlikely(!p))
5139                 goto out_overflow;
5140         memcpy(flavor->gss.sec_oid4.data, p, flavor->gss.sec_oid4.len);
5141
5142         p = xdr_inline_decode(xdr, 8);
5143         if (unlikely(!p))
5144                 goto out_overflow;
5145         flavor->gss.qop4 = be32_to_cpup(p++);
5146         flavor->gss.service = be32_to_cpup(p);
5147
5148         return 0;
5149
5150 out_overflow:
5151         print_overflow_msg(__func__, xdr);
5152         return -EIO;
5153 out_err:
5154         return -EINVAL;
5155 }
5156
5157 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5158 {
5159         struct nfs4_secinfo_flavor *sec_flavor;
5160         int status;
5161         __be32 *p;
5162         int i, num_flavors;
5163
5164         status = decode_op_hdr(xdr, OP_SECINFO);
5165         if (status)
5166                 goto out;
5167         p = xdr_inline_decode(xdr, 4);
5168         if (unlikely(!p))
5169                 goto out_overflow;
5170
5171         res->flavors->num_flavors = 0;
5172         num_flavors = be32_to_cpup(p);
5173
5174         for (i = 0; i < num_flavors; i++) {
5175                 sec_flavor = &res->flavors->flavors[i];
5176                 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5177                         break;
5178
5179                 p = xdr_inline_decode(xdr, 4);
5180                 if (unlikely(!p))
5181                         goto out_overflow;
5182                 sec_flavor->flavor = be32_to_cpup(p);
5183
5184                 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5185                         status = decode_secinfo_gss(xdr, sec_flavor);
5186                         if (status)
5187                                 goto out;
5188                 }
5189                 res->flavors->num_flavors++;
5190         }
5191
5192 out:
5193         return status;
5194 out_overflow:
5195         print_overflow_msg(__func__, xdr);
5196         return -EIO;
5197 }
5198
5199 #if defined(CONFIG_NFS_V4_1)
5200 static int decode_exchange_id(struct xdr_stream *xdr,
5201                               struct nfs41_exchange_id_res *res)
5202 {
5203         __be32 *p;
5204         uint32_t dummy;
5205         char *dummy_str;
5206         int status;
5207         struct nfs_client *clp = res->client;
5208
5209         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5210         if (status)
5211                 return status;
5212
5213         p = xdr_inline_decode(xdr, 8);
5214         if (unlikely(!p))
5215                 goto out_overflow;
5216         xdr_decode_hyper(p, &clp->cl_clientid);
5217         p = xdr_inline_decode(xdr, 12);
5218         if (unlikely(!p))
5219                 goto out_overflow;
5220         clp->cl_seqid = be32_to_cpup(p++);
5221         clp->cl_exchange_flags = be32_to_cpup(p++);
5222
5223         /* We ask for SP4_NONE */
5224         dummy = be32_to_cpup(p);
5225         if (dummy != SP4_NONE)
5226                 return -EIO;
5227
5228         /* Throw away minor_id */
5229         p = xdr_inline_decode(xdr, 8);
5230         if (unlikely(!p))
5231                 goto out_overflow;
5232
5233         /* Throw away Major id */
5234         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5235         if (unlikely(status))
5236                 return status;
5237
5238         /* Save server_scope */
5239         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5240         if (unlikely(status))
5241                 return status;
5242
5243         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5244                 return -EIO;
5245
5246         memcpy(res->server_scope->server_scope, dummy_str, dummy);
5247         res->server_scope->server_scope_sz = dummy;
5248
5249         /* Throw away Implementation id array */
5250         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5251         if (unlikely(status))
5252                 return status;
5253
5254         return 0;
5255 out_overflow:
5256         print_overflow_msg(__func__, xdr);
5257         return -EIO;
5258 }
5259
5260 static int decode_chan_attrs(struct xdr_stream *xdr,
5261                              struct nfs4_channel_attrs *attrs)
5262 {
5263         __be32 *p;
5264         u32 nr_attrs, val;
5265
5266         p = xdr_inline_decode(xdr, 28);
5267         if (unlikely(!p))
5268                 goto out_overflow;
5269         val = be32_to_cpup(p++);        /* headerpadsz */
5270         if (val)
5271                 return -EINVAL;         /* no support for header padding yet */
5272         attrs->max_rqst_sz = be32_to_cpup(p++);
5273         attrs->max_resp_sz = be32_to_cpup(p++);
5274         attrs->max_resp_sz_cached = be32_to_cpup(p++);
5275         attrs->max_ops = be32_to_cpup(p++);
5276         attrs->max_reqs = be32_to_cpup(p++);
5277         nr_attrs = be32_to_cpup(p);
5278         if (unlikely(nr_attrs > 1)) {
5279                 printk(KERN_WARNING "%s: Invalid rdma channel attrs count %u\n",
5280                         __func__, nr_attrs);
5281                 return -EINVAL;
5282         }
5283         if (nr_attrs == 1) {
5284                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5285                 if (unlikely(!p))
5286                         goto out_overflow;
5287         }
5288         return 0;
5289 out_overflow:
5290         print_overflow_msg(__func__, xdr);
5291         return -EIO;
5292 }
5293
5294 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5295 {
5296         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5297 }
5298
5299 static int decode_create_session(struct xdr_stream *xdr,
5300                                  struct nfs41_create_session_res *res)
5301 {
5302         __be32 *p;
5303         int status;
5304         struct nfs_client *clp = res->client;
5305         struct nfs4_session *session = clp->cl_session;
5306
5307         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5308         if (!status)
5309                 status = decode_sessionid(xdr, &session->sess_id);
5310         if (unlikely(status))
5311                 return status;
5312
5313         /* seqid, flags */
5314         p = xdr_inline_decode(xdr, 8);
5315         if (unlikely(!p))
5316                 goto out_overflow;
5317         clp->cl_seqid = be32_to_cpup(p++);
5318         session->flags = be32_to_cpup(p);
5319
5320         /* Channel attributes */
5321         status = decode_chan_attrs(xdr, &session->fc_attrs);
5322         if (!status)
5323                 status = decode_chan_attrs(xdr, &session->bc_attrs);
5324         return status;
5325 out_overflow:
5326         print_overflow_msg(__func__, xdr);
5327         return -EIO;
5328 }
5329
5330 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5331 {
5332         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5333 }
5334
5335 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5336 {
5337         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5338 }
5339 #endif /* CONFIG_NFS_V4_1 */
5340
5341 static int decode_sequence(struct xdr_stream *xdr,
5342                            struct nfs4_sequence_res *res,
5343                            struct rpc_rqst *rqstp)
5344 {
5345 #if defined(CONFIG_NFS_V4_1)
5346         struct nfs4_sessionid id;
5347         u32 dummy;
5348         int status;
5349         __be32 *p;
5350
5351         if (!res->sr_session)
5352                 return 0;
5353
5354         status = decode_op_hdr(xdr, OP_SEQUENCE);
5355         if (!status)
5356                 status = decode_sessionid(xdr, &id);
5357         if (unlikely(status))
5358                 goto out_err;
5359
5360         /*
5361          * If the server returns different values for sessionID, slotID or
5362          * sequence number, the server is looney tunes.
5363          */
5364         status = -EREMOTEIO;
5365
5366         if (memcmp(id.data, res->sr_session->sess_id.data,
5367                    NFS4_MAX_SESSIONID_LEN)) {
5368                 dprintk("%s Invalid session id\n", __func__);
5369                 goto out_err;
5370         }
5371
5372         p = xdr_inline_decode(xdr, 20);
5373         if (unlikely(!p))
5374                 goto out_overflow;
5375
5376         /* seqid */
5377         dummy = be32_to_cpup(p++);
5378         if (dummy != res->sr_slot->seq_nr) {
5379                 dprintk("%s Invalid sequence number\n", __func__);
5380                 goto out_err;
5381         }
5382         /* slot id */
5383         dummy = be32_to_cpup(p++);
5384         if (dummy != res->sr_slot - res->sr_session->fc_slot_table.slots) {
5385                 dprintk("%s Invalid slot id\n", __func__);
5386                 goto out_err;
5387         }
5388         /* highest slot id - currently not processed */
5389         dummy = be32_to_cpup(p++);
5390         /* target highest slot id - currently not processed */
5391         dummy = be32_to_cpup(p++);
5392         /* result flags */
5393         res->sr_status_flags = be32_to_cpup(p);
5394         status = 0;
5395 out_err:
5396         res->sr_status = status;
5397         return status;
5398 out_overflow:
5399         print_overflow_msg(__func__, xdr);
5400         status = -EIO;
5401         goto out_err;
5402 #else  /* CONFIG_NFS_V4_1 */
5403         return 0;
5404 #endif /* CONFIG_NFS_V4_1 */
5405 }
5406
5407 #if defined(CONFIG_NFS_V4_1)
5408 /*
5409  * TODO: Need to handle case when EOF != true;
5410  */
5411 static int decode_getdevicelist(struct xdr_stream *xdr,
5412                                 struct pnfs_devicelist *res)
5413 {
5414         __be32 *p;
5415         int status, i;
5416         struct nfs_writeverf verftemp;
5417
5418         status = decode_op_hdr(xdr, OP_GETDEVICELIST);
5419         if (status)
5420                 return status;
5421
5422         p = xdr_inline_decode(xdr, 8 + 8 + 4);
5423         if (unlikely(!p))
5424                 goto out_overflow;
5425
5426         /* TODO: Skip cookie for now */
5427         p += 2;
5428
5429         /* Read verifier */
5430         p = xdr_decode_opaque_fixed(p, verftemp.verifier, 8);
5431
5432         res->num_devs = be32_to_cpup(p);
5433
5434         dprintk("%s: num_dev %d\n", __func__, res->num_devs);
5435
5436         if (res->num_devs > NFS4_PNFS_GETDEVLIST_MAXNUM) {
5437                 printk(KERN_ERR "%s too many result dev_num %u\n",
5438                                 __func__, res->num_devs);
5439                 return -EIO;
5440         }
5441
5442         p = xdr_inline_decode(xdr,
5443                               res->num_devs * NFS4_DEVICEID4_SIZE + 4);
5444         if (unlikely(!p))
5445                 goto out_overflow;
5446         for (i = 0; i < res->num_devs; i++)
5447                 p = xdr_decode_opaque_fixed(p, res->dev_id[i].data,
5448                                             NFS4_DEVICEID4_SIZE);
5449         res->eof = be32_to_cpup(p);
5450         return 0;
5451 out_overflow:
5452         print_overflow_msg(__func__, xdr);
5453         return -EIO;
5454 }
5455
5456 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5457                                 struct pnfs_device *pdev)
5458 {
5459         __be32 *p;
5460         uint32_t len, type;
5461         int status;
5462
5463         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5464         if (status) {
5465                 if (status == -ETOOSMALL) {
5466                         p = xdr_inline_decode(xdr, 4);
5467                         if (unlikely(!p))
5468                                 goto out_overflow;
5469                         pdev->mincount = be32_to_cpup(p);
5470                         dprintk("%s: Min count too small. mincnt = %u\n",
5471                                 __func__, pdev->mincount);
5472                 }
5473                 return status;
5474         }
5475
5476         p = xdr_inline_decode(xdr, 8);
5477         if (unlikely(!p))
5478                 goto out_overflow;
5479         type = be32_to_cpup(p++);
5480         if (type != pdev->layout_type) {
5481                 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5482                         __func__, pdev->layout_type, type);
5483                 return -EINVAL;
5484         }
5485         /*
5486          * Get the length of the opaque device_addr4. xdr_read_pages places
5487          * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5488          * and places the remaining xdr data in xdr_buf->tail
5489          */
5490         pdev->mincount = be32_to_cpup(p);
5491         xdr_read_pages(xdr, pdev->mincount); /* include space for the length */
5492
5493         /* Parse notification bitmap, verifying that it is zero. */
5494         p = xdr_inline_decode(xdr, 4);
5495         if (unlikely(!p))
5496                 goto out_overflow;
5497         len = be32_to_cpup(p);
5498         if (len) {
5499                 uint32_t i;
5500
5501                 p = xdr_inline_decode(xdr, 4 * len);
5502                 if (unlikely(!p))
5503                         goto out_overflow;
5504                 for (i = 0; i < len; i++, p++) {
5505                         if (be32_to_cpup(p)) {
5506                                 dprintk("%s: notifications not supported\n",
5507                                         __func__);
5508                                 return -EIO;
5509                         }
5510                 }
5511         }
5512         return 0;
5513 out_overflow:
5514         print_overflow_msg(__func__, xdr);
5515         return -EIO;
5516 }
5517
5518 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5519                             struct nfs4_layoutget_res *res)
5520 {
5521         __be32 *p;
5522         int status;
5523         u32 layout_count;
5524         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5525         struct kvec *iov = rcvbuf->head;
5526         u32 hdrlen, recvd;
5527
5528         status = decode_op_hdr(xdr, OP_LAYOUTGET);
5529         if (status)
5530                 return status;
5531         p = xdr_inline_decode(xdr, 8 + NFS4_STATEID_SIZE);
5532         if (unlikely(!p))
5533                 goto out_overflow;
5534         res->return_on_close = be32_to_cpup(p++);
5535         p = xdr_decode_opaque_fixed(p, res->stateid.data, NFS4_STATEID_SIZE);
5536         layout_count = be32_to_cpup(p);
5537         if (!layout_count) {
5538                 dprintk("%s: server responded with empty layout array\n",
5539                         __func__);
5540                 return -EINVAL;
5541         }
5542
5543         p = xdr_inline_decode(xdr, 28);
5544         if (unlikely(!p))
5545                 goto out_overflow;
5546         p = xdr_decode_hyper(p, &res->range.offset);
5547         p = xdr_decode_hyper(p, &res->range.length);
5548         res->range.iomode = be32_to_cpup(p++);
5549         res->type = be32_to_cpup(p++);
5550         res->layoutp->len = be32_to_cpup(p);
5551
5552         dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5553                 __func__,
5554                 (unsigned long)res->range.offset,
5555                 (unsigned long)res->range.length,
5556                 res->range.iomode,
5557                 res->type,
5558                 res->layoutp->len);
5559
5560         hdrlen = (u8 *) xdr->p - (u8 *) iov->iov_base;
5561         recvd = req->rq_rcv_buf.len - hdrlen;
5562         if (res->layoutp->len > recvd) {
5563                 dprintk("NFS: server cheating in layoutget reply: "
5564                                 "layout len %u > recvd %u\n",
5565                                 res->layoutp->len, recvd);
5566                 return -EINVAL;
5567         }
5568
5569         xdr_read_pages(xdr, res->layoutp->len);
5570
5571         if (layout_count > 1) {
5572                 /* We only handle a length one array at the moment.  Any
5573                  * further entries are just ignored.  Note that this means
5574                  * the client may see a response that is less than the
5575                  * minimum it requested.
5576                  */
5577                 dprintk("%s: server responded with %d layouts, dropping tail\n",
5578                         __func__, layout_count);
5579         }
5580
5581         return 0;
5582 out_overflow:
5583         print_overflow_msg(__func__, xdr);
5584         return -EIO;
5585 }
5586
5587 static int decode_layoutreturn(struct xdr_stream *xdr,
5588                                struct nfs4_layoutreturn_res *res)
5589 {
5590         __be32 *p;
5591         int status;
5592
5593         status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5594         if (status)
5595                 return status;
5596         p = xdr_inline_decode(xdr, 4);
5597         if (unlikely(!p))
5598                 goto out_overflow;
5599         res->lrs_present = be32_to_cpup(p);
5600         if (res->lrs_present)
5601                 status = decode_stateid(xdr, &res->stateid);
5602         return status;
5603 out_overflow:
5604         print_overflow_msg(__func__, xdr);
5605         return -EIO;
5606 }
5607
5608 static int decode_layoutcommit(struct xdr_stream *xdr,
5609                                struct rpc_rqst *req,
5610                                struct nfs4_layoutcommit_res *res)
5611 {
5612         __be32 *p;
5613         __u32 sizechanged;
5614         int status;
5615
5616         status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5617         res->status = status;
5618         if (status)
5619                 return status;
5620
5621         p = xdr_inline_decode(xdr, 4);
5622         if (unlikely(!p))
5623                 goto out_overflow;
5624         sizechanged = be32_to_cpup(p);
5625
5626         if (sizechanged) {
5627                 /* throw away new size */
5628                 p = xdr_inline_decode(xdr, 8);
5629                 if (unlikely(!p))
5630                         goto out_overflow;
5631         }
5632         return 0;
5633 out_overflow:
5634         print_overflow_msg(__func__, xdr);
5635         return -EIO;
5636 }
5637
5638 static int decode_test_stateid(struct xdr_stream *xdr,
5639                                struct nfs41_test_stateid_res *res)
5640 {
5641         __be32 *p;
5642         int status;
5643         int num_res;
5644
5645         status = decode_op_hdr(xdr, OP_TEST_STATEID);
5646         if (status)
5647                 return status;
5648
5649         p = xdr_inline_decode(xdr, 4);
5650         if (unlikely(!p))
5651                 goto out_overflow;
5652         num_res = be32_to_cpup(p++);
5653         if (num_res != 1)
5654                 goto out;
5655
5656         p = xdr_inline_decode(xdr, 4);
5657         if (unlikely(!p))
5658                 goto out_overflow;
5659         res->status = be32_to_cpup(p++);
5660         return res->status;
5661 out_overflow:
5662         print_overflow_msg(__func__, xdr);
5663 out:
5664         return -EIO;
5665 }
5666
5667 static int decode_free_stateid(struct xdr_stream *xdr,
5668                                struct nfs41_free_stateid_res *res)
5669 {
5670         __be32 *p;
5671         int status;
5672
5673         status = decode_op_hdr(xdr, OP_FREE_STATEID);
5674         if (status)
5675                 return status;
5676
5677         p = xdr_inline_decode(xdr, 4);
5678         if (unlikely(!p))
5679                 goto out_overflow;
5680         res->status = be32_to_cpup(p++);
5681         return res->status;
5682 out_overflow:
5683         print_overflow_msg(__func__, xdr);
5684         return -EIO;
5685 }
5686 #endif /* CONFIG_NFS_V4_1 */
5687
5688 /*
5689  * END OF "GENERIC" DECODE ROUTINES.
5690  */
5691
5692 /*
5693  * Decode OPEN_DOWNGRADE response
5694  */
5695 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
5696                                        struct xdr_stream *xdr,
5697                                        struct nfs_closeres *res)
5698 {
5699         struct compound_hdr hdr;
5700         int status;
5701
5702         status = decode_compound_hdr(xdr, &hdr);
5703         if (status)
5704                 goto out;
5705         status = decode_sequence(xdr, &res->seq_res, rqstp);
5706         if (status)
5707                 goto out;
5708         status = decode_putfh(xdr);
5709         if (status)
5710                 goto out;
5711         status = decode_open_downgrade(xdr, res);
5712         if (status != 0)
5713                 goto out;
5714         decode_getfattr(xdr, res->fattr, res->server,
5715                         !RPC_IS_ASYNC(rqstp->rq_task));
5716 out:
5717         return status;
5718 }
5719
5720 /*
5721  * Decode ACCESS response
5722  */
5723 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5724                                struct nfs4_accessres *res)
5725 {
5726         struct compound_hdr hdr;
5727         int status;
5728
5729         status = decode_compound_hdr(xdr, &hdr);
5730         if (status)
5731                 goto out;
5732         status = decode_sequence(xdr, &res->seq_res, rqstp);
5733         if (status)
5734                 goto out;
5735         status = decode_putfh(xdr);
5736         if (status != 0)
5737                 goto out;
5738         status = decode_access(xdr, res);
5739         if (status != 0)
5740                 goto out;
5741         decode_getfattr(xdr, res->fattr, res->server,
5742                         !RPC_IS_ASYNC(rqstp->rq_task));
5743 out:
5744         return status;
5745 }
5746
5747 /*
5748  * Decode LOOKUP response
5749  */
5750 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5751                                struct nfs4_lookup_res *res)
5752 {
5753         struct compound_hdr hdr;
5754         int status;
5755
5756         status = decode_compound_hdr(xdr, &hdr);
5757         if (status)
5758                 goto out;
5759         status = decode_sequence(xdr, &res->seq_res, rqstp);
5760         if (status)
5761                 goto out;
5762         status = decode_putfh(xdr);
5763         if (status)
5764                 goto out;
5765         status = decode_lookup(xdr);
5766         if (status)
5767                 goto out;
5768         status = decode_getfh(xdr, res->fh);
5769         if (status)
5770                 goto out;
5771         status = decode_getfattr(xdr, res->fattr, res->server
5772                         ,!RPC_IS_ASYNC(rqstp->rq_task));
5773 out:
5774         return status;
5775 }
5776
5777 /*
5778  * Decode LOOKUP_ROOT response
5779  */
5780 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
5781                                     struct xdr_stream *xdr,
5782                                     struct nfs4_lookup_res *res)
5783 {
5784         struct compound_hdr hdr;
5785         int status;
5786
5787         status = decode_compound_hdr(xdr, &hdr);
5788         if (status)
5789                 goto out;
5790         status = decode_sequence(xdr, &res->seq_res, rqstp);
5791         if (status)
5792                 goto out;
5793         status = decode_putrootfh(xdr);
5794         if (status)
5795                 goto out;
5796         status = decode_getfh(xdr, res->fh);
5797         if (status == 0)
5798                 status = decode_getfattr(xdr, res->fattr, res->server,
5799                                 !RPC_IS_ASYNC(rqstp->rq_task));
5800 out:
5801         return status;
5802 }
5803
5804 /*
5805  * Decode REMOVE response
5806  */
5807 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5808                                struct nfs_removeres *res)
5809 {
5810         struct compound_hdr hdr;
5811         int status;
5812
5813         status = decode_compound_hdr(xdr, &hdr);
5814         if (status)
5815                 goto out;
5816         status = decode_sequence(xdr, &res->seq_res, rqstp);
5817         if (status)
5818                 goto out;
5819         status = decode_putfh(xdr);
5820         if (status)
5821                 goto out;
5822         status = decode_remove(xdr, &res->cinfo);
5823         if (status)
5824                 goto out;
5825         decode_getfattr(xdr, res->dir_attr, res->server,
5826                         !RPC_IS_ASYNC(rqstp->rq_task));
5827 out:
5828         return status;
5829 }
5830
5831 /*
5832  * Decode RENAME response
5833  */
5834 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5835                                struct nfs_renameres *res)
5836 {
5837         struct compound_hdr hdr;
5838         int status;
5839
5840         status = decode_compound_hdr(xdr, &hdr);
5841         if (status)
5842                 goto out;
5843         status = decode_sequence(xdr, &res->seq_res, rqstp);
5844         if (status)
5845                 goto out;
5846         status = decode_putfh(xdr);
5847         if (status)
5848                 goto out;
5849         status = decode_savefh(xdr);
5850         if (status)
5851                 goto out;
5852         status = decode_putfh(xdr);
5853         if (status)
5854                 goto out;
5855         status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
5856         if (status)
5857                 goto out;
5858         /* Current FH is target directory */
5859         if (decode_getfattr(xdr, res->new_fattr, res->server,
5860                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5861                 goto out;
5862         status = decode_restorefh(xdr);
5863         if (status)
5864                 goto out;
5865         decode_getfattr(xdr, res->old_fattr, res->server,
5866                         !RPC_IS_ASYNC(rqstp->rq_task));
5867 out:
5868         return status;
5869 }
5870
5871 /*
5872  * Decode LINK response
5873  */
5874 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5875                              struct nfs4_link_res *res)
5876 {
5877         struct compound_hdr hdr;
5878         int status;
5879
5880         status = decode_compound_hdr(xdr, &hdr);
5881         if (status)
5882                 goto out;
5883         status = decode_sequence(xdr, &res->seq_res, rqstp);
5884         if (status)
5885                 goto out;
5886         status = decode_putfh(xdr);
5887         if (status)
5888                 goto out;
5889         status = decode_savefh(xdr);
5890         if (status)
5891                 goto out;
5892         status = decode_putfh(xdr);
5893         if (status)
5894                 goto out;
5895         status = decode_link(xdr, &res->cinfo);
5896         if (status)
5897                 goto out;
5898         /*
5899          * Note order: OP_LINK leaves the directory as the current
5900          *             filehandle.
5901          */
5902         if (decode_getfattr(xdr, res->dir_attr, res->server,
5903                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5904                 goto out;
5905         status = decode_restorefh(xdr);
5906         if (status)
5907                 goto out;
5908         decode_getfattr(xdr, res->fattr, res->server,
5909                         !RPC_IS_ASYNC(rqstp->rq_task));
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                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5943                 goto out;
5944         status = decode_restorefh(xdr);
5945         if (status)
5946                 goto out;
5947         decode_getfattr(xdr, res->dir_fattr, res->server,
5948                         !RPC_IS_ASYNC(rqstp->rq_task));
5949 out:
5950         return status;
5951 }
5952
5953 /*
5954  * Decode SYMLINK response
5955  */
5956 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5957                                 struct nfs4_create_res *res)
5958 {
5959         return nfs4_xdr_dec_create(rqstp, xdr, res);
5960 }
5961
5962 /*
5963  * Decode GETATTR response
5964  */
5965 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5966                                 struct nfs4_getattr_res *res)
5967 {
5968         struct compound_hdr hdr;
5969         int status;
5970
5971         status = decode_compound_hdr(xdr, &hdr);
5972         if (status)
5973                 goto out;
5974         status = decode_sequence(xdr, &res->seq_res, rqstp);
5975         if (status)
5976                 goto out;
5977         status = decode_putfh(xdr);
5978         if (status)
5979                 goto out;
5980         status = decode_getfattr(xdr, res->fattr, res->server,
5981                         !RPC_IS_ASYNC(rqstp->rq_task));
5982 out:
5983         return status;
5984 }
5985
5986 /*
5987  * Encode an SETACL request
5988  */
5989 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
5990                                 struct nfs_setaclargs *args)
5991 {
5992         struct compound_hdr hdr = {
5993                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
5994         };
5995
5996         encode_compound_hdr(xdr, req, &hdr);
5997         encode_sequence(xdr, &args->seq_args, &hdr);
5998         encode_putfh(xdr, args->fh, &hdr);
5999         encode_setacl(xdr, args, &hdr);
6000         encode_nops(&hdr);
6001 }
6002
6003 /*
6004  * Decode SETACL response
6005  */
6006 static int
6007 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6008                     struct nfs_setaclres *res)
6009 {
6010         struct compound_hdr hdr;
6011         int status;
6012
6013         status = decode_compound_hdr(xdr, &hdr);
6014         if (status)
6015                 goto out;
6016         status = decode_sequence(xdr, &res->seq_res, rqstp);
6017         if (status)
6018                 goto out;
6019         status = decode_putfh(xdr);
6020         if (status)
6021                 goto out;
6022         status = decode_setattr(xdr);
6023 out:
6024         return status;
6025 }
6026
6027 /*
6028  * Decode GETACL response
6029  */
6030 static int
6031 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6032                     struct nfs_getaclres *res)
6033 {
6034         struct compound_hdr hdr;
6035         int status;
6036
6037         status = decode_compound_hdr(xdr, &hdr);
6038         if (status)
6039                 goto out;
6040         status = decode_sequence(xdr, &res->seq_res, rqstp);
6041         if (status)
6042                 goto out;
6043         status = decode_putfh(xdr);
6044         if (status)
6045                 goto out;
6046         status = decode_getacl(xdr, rqstp, res);
6047
6048 out:
6049         return status;
6050 }
6051
6052 /*
6053  * Decode CLOSE response
6054  */
6055 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6056                               struct nfs_closeres *res)
6057 {
6058         struct compound_hdr hdr;
6059         int status;
6060
6061         status = decode_compound_hdr(xdr, &hdr);
6062         if (status)
6063                 goto out;
6064         status = decode_sequence(xdr, &res->seq_res, rqstp);
6065         if (status)
6066                 goto out;
6067         status = decode_putfh(xdr);
6068         if (status)
6069                 goto out;
6070         status = decode_close(xdr, res);
6071         if (status != 0)
6072                 goto out;
6073         /*
6074          * Note: Server may do delete on close for this file
6075          *      in which case the getattr call will fail with
6076          *      an ESTALE error. Shouldn't be a problem,
6077          *      though, since fattr->valid will remain unset.
6078          */
6079         decode_getfattr(xdr, res->fattr, res->server,
6080                         !RPC_IS_ASYNC(rqstp->rq_task));
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,
6112                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
6113                 goto out;
6114         if (decode_restorefh(xdr) != 0)
6115                 goto out;
6116         decode_getfattr(xdr, res->dir_attr, res->server,
6117                         !RPC_IS_ASYNC(rqstp->rq_task));
6118 out:
6119         return status;
6120 }
6121
6122 /*
6123  * Decode OPEN_CONFIRM response
6124  */
6125 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6126                                      struct xdr_stream *xdr,
6127                                      struct nfs_open_confirmres *res)
6128 {
6129         struct compound_hdr hdr;
6130         int status;
6131
6132         status = decode_compound_hdr(xdr, &hdr);
6133         if (status)
6134                 goto out;
6135         status = decode_putfh(xdr);
6136         if (status)
6137                 goto out;
6138         status = decode_open_confirm(xdr, res);
6139 out:
6140         return status;
6141 }
6142
6143 /*
6144  * Decode OPEN response
6145  */
6146 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6147                                     struct xdr_stream *xdr,
6148                                     struct nfs_openres *res)
6149 {
6150         struct compound_hdr hdr;
6151         int status;
6152
6153         status = decode_compound_hdr(xdr, &hdr);
6154         if (status)
6155                 goto out;
6156         status = decode_sequence(xdr, &res->seq_res, rqstp);
6157         if (status)
6158                 goto out;
6159         status = decode_putfh(xdr);
6160         if (status)
6161                 goto out;
6162         status = decode_open(xdr, res);
6163         if (status)
6164                 goto out;
6165         decode_getfattr(xdr, res->f_attr, res->server,
6166                         !RPC_IS_ASYNC(rqstp->rq_task));
6167 out:
6168         return status;
6169 }
6170
6171 /*
6172  * Decode SETATTR response
6173  */
6174 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6175                                 struct xdr_stream *xdr,
6176                                 struct nfs_setattrres *res)
6177 {
6178         struct compound_hdr hdr;
6179         int status;
6180
6181         status = decode_compound_hdr(xdr, &hdr);
6182         if (status)
6183                 goto out;
6184         status = decode_sequence(xdr, &res->seq_res, rqstp);
6185         if (status)
6186                 goto out;
6187         status = decode_putfh(xdr);
6188         if (status)
6189                 goto out;
6190         status = decode_setattr(xdr);
6191         if (status)
6192                 goto out;
6193         decode_getfattr(xdr, res->fattr, res->server,
6194                         !RPC_IS_ASYNC(rqstp->rq_task));
6195 out:
6196         return status;
6197 }
6198
6199 /*
6200  * Decode LOCK response
6201  */
6202 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6203                              struct nfs_lock_res *res)
6204 {
6205         struct compound_hdr hdr;
6206         int status;
6207
6208         status = decode_compound_hdr(xdr, &hdr);
6209         if (status)
6210                 goto out;
6211         status = decode_sequence(xdr, &res->seq_res, rqstp);
6212         if (status)
6213                 goto out;
6214         status = decode_putfh(xdr);
6215         if (status)
6216                 goto out;
6217         status = decode_lock(xdr, res);
6218 out:
6219         return status;
6220 }
6221
6222 /*
6223  * Decode LOCKT response
6224  */
6225 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6226                               struct nfs_lockt_res *res)
6227 {
6228         struct compound_hdr hdr;
6229         int status;
6230
6231         status = decode_compound_hdr(xdr, &hdr);
6232         if (status)
6233                 goto out;
6234         status = decode_sequence(xdr, &res->seq_res, rqstp);
6235         if (status)
6236                 goto out;
6237         status = decode_putfh(xdr);
6238         if (status)
6239                 goto out;
6240         status = decode_lockt(xdr, res);
6241 out:
6242         return status;
6243 }
6244
6245 /*
6246  * Decode LOCKU response
6247  */
6248 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6249                               struct nfs_locku_res *res)
6250 {
6251         struct compound_hdr hdr;
6252         int status;
6253
6254         status = decode_compound_hdr(xdr, &hdr);
6255         if (status)
6256                 goto out;
6257         status = decode_sequence(xdr, &res->seq_res, rqstp);
6258         if (status)
6259                 goto out;
6260         status = decode_putfh(xdr);
6261         if (status)
6262                 goto out;
6263         status = decode_locku(xdr, res);
6264 out:
6265         return status;
6266 }
6267
6268 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6269                                           struct xdr_stream *xdr, void *dummy)
6270 {
6271         struct compound_hdr hdr;
6272         int status;
6273
6274         status = decode_compound_hdr(xdr, &hdr);
6275         if (!status)
6276                 status = decode_release_lockowner(xdr);
6277         return status;
6278 }
6279
6280 /*
6281  * Decode READLINK response
6282  */
6283 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6284                                  struct xdr_stream *xdr,
6285                                  struct nfs4_readlink_res *res)
6286 {
6287         struct compound_hdr hdr;
6288         int status;
6289
6290         status = decode_compound_hdr(xdr, &hdr);
6291         if (status)
6292                 goto out;
6293         status = decode_sequence(xdr, &res->seq_res, rqstp);
6294         if (status)
6295                 goto out;
6296         status = decode_putfh(xdr);
6297         if (status)
6298                 goto out;
6299         status = decode_readlink(xdr, rqstp);
6300 out:
6301         return status;
6302 }
6303
6304 /*
6305  * Decode READDIR response
6306  */
6307 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6308                                 struct nfs4_readdir_res *res)
6309 {
6310         struct compound_hdr hdr;
6311         int status;
6312
6313         status = decode_compound_hdr(xdr, &hdr);
6314         if (status)
6315                 goto out;
6316         status = decode_sequence(xdr, &res->seq_res, rqstp);
6317         if (status)
6318                 goto out;
6319         status = decode_putfh(xdr);
6320         if (status)
6321                 goto out;
6322         status = decode_readdir(xdr, rqstp, res);
6323 out:
6324         return status;
6325 }
6326
6327 /*
6328  * Decode Read response
6329  */
6330 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6331                              struct nfs_readres *res)
6332 {
6333         struct compound_hdr hdr;
6334         int status;
6335
6336         status = decode_compound_hdr(xdr, &hdr);
6337         if (status)
6338                 goto out;
6339         status = decode_sequence(xdr, &res->seq_res, rqstp);
6340         if (status)
6341                 goto out;
6342         status = decode_putfh(xdr);
6343         if (status)
6344                 goto out;
6345         status = decode_read(xdr, rqstp, res);
6346         if (!status)
6347                 status = res->count;
6348 out:
6349         return status;
6350 }
6351
6352 /*
6353  * Decode WRITE response
6354  */
6355 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6356                               struct nfs_writeres *res)
6357 {
6358         struct compound_hdr hdr;
6359         int status;
6360
6361         status = decode_compound_hdr(xdr, &hdr);
6362         if (status)
6363                 goto out;
6364         status = decode_sequence(xdr, &res->seq_res, rqstp);
6365         if (status)
6366                 goto out;
6367         status = decode_putfh(xdr);
6368         if (status)
6369                 goto out;
6370         status = decode_write(xdr, res);
6371         if (status)
6372                 goto out;
6373         if (res->fattr)
6374                 decode_getfattr(xdr, res->fattr, res->server,
6375                                 !RPC_IS_ASYNC(rqstp->rq_task));
6376         if (!status)
6377                 status = res->count;
6378 out:
6379         return status;
6380 }
6381
6382 /*
6383  * Decode COMMIT response
6384  */
6385 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6386                                struct nfs_writeres *res)
6387 {
6388         struct compound_hdr hdr;
6389         int status;
6390
6391         status = decode_compound_hdr(xdr, &hdr);
6392         if (status)
6393                 goto out;
6394         status = decode_sequence(xdr, &res->seq_res, rqstp);
6395         if (status)
6396                 goto out;
6397         status = decode_putfh(xdr);
6398         if (status)
6399                 goto out;
6400         status = decode_commit(xdr, res);
6401         if (status)
6402                 goto out;
6403         if (res->fattr)
6404                 decode_getfattr(xdr, res->fattr, res->server,
6405                                 !RPC_IS_ASYNC(rqstp->rq_task));
6406 out:
6407         return status;
6408 }
6409
6410 /*
6411  * Decode FSINFO response
6412  */
6413 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6414                                struct nfs4_fsinfo_res *res)
6415 {
6416         struct compound_hdr hdr;
6417         int status;
6418
6419         status = decode_compound_hdr(xdr, &hdr);
6420         if (!status)
6421                 status = decode_sequence(xdr, &res->seq_res, req);
6422         if (!status)
6423                 status = decode_putfh(xdr);
6424         if (!status)
6425                 status = decode_fsinfo(xdr, res->fsinfo);
6426         return status;
6427 }
6428
6429 /*
6430  * Decode PATHCONF response
6431  */
6432 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6433                                  struct nfs4_pathconf_res *res)
6434 {
6435         struct compound_hdr hdr;
6436         int status;
6437
6438         status = decode_compound_hdr(xdr, &hdr);
6439         if (!status)
6440                 status = decode_sequence(xdr, &res->seq_res, req);
6441         if (!status)
6442                 status = decode_putfh(xdr);
6443         if (!status)
6444                 status = decode_pathconf(xdr, res->pathconf);
6445         return status;
6446 }
6447
6448 /*
6449  * Decode STATFS response
6450  */
6451 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6452                                struct nfs4_statfs_res *res)
6453 {
6454         struct compound_hdr hdr;
6455         int status;
6456
6457         status = decode_compound_hdr(xdr, &hdr);
6458         if (!status)
6459                 status = decode_sequence(xdr, &res->seq_res, req);
6460         if (!status)
6461                 status = decode_putfh(xdr);
6462         if (!status)
6463                 status = decode_statfs(xdr, res->fsstat);
6464         return status;
6465 }
6466
6467 /*
6468  * Decode GETATTR_BITMAP response
6469  */
6470 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6471                                     struct xdr_stream *xdr,
6472                                     struct nfs4_server_caps_res *res)
6473 {
6474         struct compound_hdr hdr;
6475         int status;
6476
6477         status = decode_compound_hdr(xdr, &hdr);
6478         if (status)
6479                 goto out;
6480         status = decode_sequence(xdr, &res->seq_res, req);
6481         if (status)
6482                 goto out;
6483         status = decode_putfh(xdr);
6484         if (status)
6485                 goto out;
6486         status = decode_server_caps(xdr, res);
6487 out:
6488         return status;
6489 }
6490
6491 /*
6492  * Decode RENEW response
6493  */
6494 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6495                               void *__unused)
6496 {
6497         struct compound_hdr hdr;
6498         int status;
6499
6500         status = decode_compound_hdr(xdr, &hdr);
6501         if (!status)
6502                 status = decode_renew(xdr);
6503         return status;
6504 }
6505
6506 /*
6507  * Decode SETCLIENTID response
6508  */
6509 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6510                                     struct xdr_stream *xdr,
6511                                     struct nfs4_setclientid_res *res)
6512 {
6513         struct compound_hdr hdr;
6514         int status;
6515
6516         status = decode_compound_hdr(xdr, &hdr);
6517         if (!status)
6518                 status = decode_setclientid(xdr, res);
6519         return status;
6520 }
6521
6522 /*
6523  * Decode SETCLIENTID_CONFIRM response
6524  */
6525 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6526                                             struct xdr_stream *xdr,
6527                                             struct nfs_fsinfo *fsinfo)
6528 {
6529         struct compound_hdr hdr;
6530         int status;
6531
6532         status = decode_compound_hdr(xdr, &hdr);
6533         if (!status)
6534                 status = decode_setclientid_confirm(xdr);
6535         if (!status)
6536                 status = decode_putrootfh(xdr);
6537         if (!status)
6538                 status = decode_fsinfo(xdr, fsinfo);
6539         return status;
6540 }
6541
6542 /*
6543  * Decode DELEGRETURN response
6544  */
6545 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6546                                     struct xdr_stream *xdr,
6547                                     struct nfs4_delegreturnres *res)
6548 {
6549         struct compound_hdr hdr;
6550         int status;
6551
6552         status = decode_compound_hdr(xdr, &hdr);
6553         if (status)
6554                 goto out;
6555         status = decode_sequence(xdr, &res->seq_res, rqstp);
6556         if (status)
6557                 goto out;
6558         status = decode_putfh(xdr);
6559         if (status != 0)
6560                 goto out;
6561         status = decode_delegreturn(xdr);
6562         if (status != 0)
6563                 goto out;
6564         decode_getfattr(xdr, res->fattr, res->server,
6565                         !RPC_IS_ASYNC(rqstp->rq_task));
6566 out:
6567         return status;
6568 }
6569
6570 /*
6571  * Decode FS_LOCATIONS response
6572  */
6573 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6574                                      struct xdr_stream *xdr,
6575                                      struct nfs4_fs_locations_res *res)
6576 {
6577         struct compound_hdr hdr;
6578         int status;
6579
6580         status = decode_compound_hdr(xdr, &hdr);
6581         if (status)
6582                 goto out;
6583         status = decode_sequence(xdr, &res->seq_res, req);
6584         if (status)
6585                 goto out;
6586         status = decode_putfh(xdr);
6587         if (status)
6588                 goto out;
6589         status = decode_lookup(xdr);
6590         if (status)
6591                 goto out;
6592         xdr_enter_page(xdr, PAGE_SIZE);
6593         status = decode_getfattr(xdr, &res->fs_locations->fattr,
6594                                  res->fs_locations->server,
6595                                  !RPC_IS_ASYNC(req->rq_task));
6596 out:
6597         return status;
6598 }
6599
6600 /*
6601  * Decode SECINFO response
6602  */
6603 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6604                                 struct xdr_stream *xdr,
6605                                 struct nfs4_secinfo_res *res)
6606 {
6607         struct compound_hdr hdr;
6608         int status;
6609
6610         status = decode_compound_hdr(xdr, &hdr);
6611         if (status)
6612                 goto out;
6613         status = decode_sequence(xdr, &res->seq_res, rqstp);
6614         if (status)
6615                 goto out;
6616         status = decode_putfh(xdr);
6617         if (status)
6618                 goto out;
6619         status = decode_secinfo(xdr, res);
6620 out:
6621         return status;
6622 }
6623
6624 #if defined(CONFIG_NFS_V4_1)
6625 /*
6626  * Decode EXCHANGE_ID response
6627  */
6628 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
6629                                     struct xdr_stream *xdr,
6630                                     void *res)
6631 {
6632         struct compound_hdr hdr;
6633         int status;
6634
6635         status = decode_compound_hdr(xdr, &hdr);
6636         if (!status)
6637                 status = decode_exchange_id(xdr, res);
6638         return status;
6639 }
6640
6641 /*
6642  * Decode CREATE_SESSION response
6643  */
6644 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
6645                                        struct xdr_stream *xdr,
6646                                        struct nfs41_create_session_res *res)
6647 {
6648         struct compound_hdr hdr;
6649         int status;
6650
6651         status = decode_compound_hdr(xdr, &hdr);
6652         if (!status)
6653                 status = decode_create_session(xdr, res);
6654         return status;
6655 }
6656
6657 /*
6658  * Decode DESTROY_SESSION response
6659  */
6660 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
6661                                         struct xdr_stream *xdr,
6662                                         void *res)
6663 {
6664         struct compound_hdr hdr;
6665         int status;
6666
6667         status = decode_compound_hdr(xdr, &hdr);
6668         if (!status)
6669                 status = decode_destroy_session(xdr, res);
6670         return status;
6671 }
6672
6673 /*
6674  * Decode SEQUENCE response
6675  */
6676 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
6677                                  struct xdr_stream *xdr,
6678                                  struct nfs4_sequence_res *res)
6679 {
6680         struct compound_hdr hdr;
6681         int status;
6682
6683         status = decode_compound_hdr(xdr, &hdr);
6684         if (!status)
6685                 status = decode_sequence(xdr, res, rqstp);
6686         return status;
6687 }
6688
6689 /*
6690  * Decode GET_LEASE_TIME response
6691  */
6692 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
6693                                        struct xdr_stream *xdr,
6694                                        struct nfs4_get_lease_time_res *res)
6695 {
6696         struct compound_hdr hdr;
6697         int status;
6698
6699         status = decode_compound_hdr(xdr, &hdr);
6700         if (!status)
6701                 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
6702         if (!status)
6703                 status = decode_putrootfh(xdr);
6704         if (!status)
6705                 status = decode_fsinfo(xdr, res->lr_fsinfo);
6706         return status;
6707 }
6708
6709 /*
6710  * Decode RECLAIM_COMPLETE response
6711  */
6712 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
6713                                          struct xdr_stream *xdr,
6714                                          struct nfs41_reclaim_complete_res *res)
6715 {
6716         struct compound_hdr hdr;
6717         int status;
6718
6719         status = decode_compound_hdr(xdr, &hdr);
6720         if (!status)
6721                 status = decode_sequence(xdr, &res->seq_res, rqstp);
6722         if (!status)
6723                 status = decode_reclaim_complete(xdr, (void *)NULL);
6724         return status;
6725 }
6726
6727 /*
6728  * Decode GETDEVICELIST response
6729  */
6730 static int nfs4_xdr_dec_getdevicelist(struct rpc_rqst *rqstp,
6731                                       struct xdr_stream *xdr,
6732                                       struct nfs4_getdevicelist_res *res)
6733 {
6734         struct compound_hdr hdr;
6735         int status;
6736
6737         dprintk("encoding getdevicelist!\n");
6738
6739         status = decode_compound_hdr(xdr, &hdr);
6740         if (status != 0)
6741                 goto out;
6742         status = decode_sequence(xdr, &res->seq_res, rqstp);
6743         if (status != 0)
6744                 goto out;
6745         status = decode_putfh(xdr);
6746         if (status != 0)
6747                 goto out;
6748         status = decode_getdevicelist(xdr, res->devlist);
6749 out:
6750         return status;
6751 }
6752
6753 /*
6754  * Decode GETDEVINFO response
6755  */
6756 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
6757                                       struct xdr_stream *xdr,
6758                                       struct nfs4_getdeviceinfo_res *res)
6759 {
6760         struct compound_hdr hdr;
6761         int status;
6762
6763         status = decode_compound_hdr(xdr, &hdr);
6764         if (status != 0)
6765                 goto out;
6766         status = decode_sequence(xdr, &res->seq_res, rqstp);
6767         if (status != 0)
6768                 goto out;
6769         status = decode_getdeviceinfo(xdr, res->pdev);
6770 out:
6771         return status;
6772 }
6773
6774 /*
6775  * Decode LAYOUTGET response
6776  */
6777 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
6778                                   struct xdr_stream *xdr,
6779                                   struct nfs4_layoutget_res *res)
6780 {
6781         struct compound_hdr hdr;
6782         int status;
6783
6784         status = decode_compound_hdr(xdr, &hdr);
6785         if (status)
6786                 goto out;
6787         status = decode_sequence(xdr, &res->seq_res, rqstp);
6788         if (status)
6789                 goto out;
6790         status = decode_putfh(xdr);
6791         if (status)
6792                 goto out;
6793         status = decode_layoutget(xdr, rqstp, res);
6794 out:
6795         return status;
6796 }
6797
6798 /*
6799  * Decode LAYOUTRETURN response
6800  */
6801 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
6802                                      struct xdr_stream *xdr,
6803                                      struct nfs4_layoutreturn_res *res)
6804 {
6805         struct compound_hdr hdr;
6806         int status;
6807
6808         status = decode_compound_hdr(xdr, &hdr);
6809         if (status)
6810                 goto out;
6811         status = decode_sequence(xdr, &res->seq_res, rqstp);
6812         if (status)
6813                 goto out;
6814         status = decode_putfh(xdr);
6815         if (status)
6816                 goto out;
6817         status = decode_layoutreturn(xdr, res);
6818 out:
6819         return status;
6820 }
6821
6822 /*
6823  * Decode LAYOUTCOMMIT response
6824  */
6825 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
6826                                      struct xdr_stream *xdr,
6827                                      struct nfs4_layoutcommit_res *res)
6828 {
6829         struct compound_hdr hdr;
6830         int status;
6831
6832         status = decode_compound_hdr(xdr, &hdr);
6833         if (status)
6834                 goto out;
6835         status = decode_sequence(xdr, &res->seq_res, rqstp);
6836         if (status)
6837                 goto out;
6838         status = decode_putfh(xdr);
6839         if (status)
6840                 goto out;
6841         status = decode_layoutcommit(xdr, rqstp, res);
6842         if (status)
6843                 goto out;
6844         decode_getfattr(xdr, res->fattr, res->server,
6845                         !RPC_IS_ASYNC(rqstp->rq_task));
6846 out:
6847         return status;
6848 }
6849
6850 /*
6851  * Decode SECINFO_NO_NAME response
6852  */
6853 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
6854                                         struct xdr_stream *xdr,
6855                                         struct nfs4_secinfo_res *res)
6856 {
6857         struct compound_hdr hdr;
6858         int status;
6859
6860         status = decode_compound_hdr(xdr, &hdr);
6861         if (status)
6862                 goto out;
6863         status = decode_sequence(xdr, &res->seq_res, rqstp);
6864         if (status)
6865                 goto out;
6866         status = decode_putrootfh(xdr);
6867         if (status)
6868                 goto out;
6869         status = decode_secinfo(xdr, res);
6870 out:
6871         return status;
6872 }
6873
6874 /*
6875  * Decode TEST_STATEID response
6876  */
6877 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
6878                                      struct xdr_stream *xdr,
6879                                      struct nfs41_test_stateid_res *res)
6880 {
6881         struct compound_hdr hdr;
6882         int status;
6883
6884         status = decode_compound_hdr(xdr, &hdr);
6885         if (status)
6886                 goto out;
6887         status = decode_sequence(xdr, &res->seq_res, rqstp);
6888         if (status)
6889                 goto out;
6890         status = decode_test_stateid(xdr, res);
6891 out:
6892         return status;
6893 }
6894
6895 /*
6896  * Decode FREE_STATEID response
6897  */
6898 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
6899                                      struct xdr_stream *xdr,
6900                                      struct nfs41_free_stateid_res *res)
6901 {
6902         struct compound_hdr hdr;
6903         int status;
6904
6905         status = decode_compound_hdr(xdr, &hdr);
6906         if (status)
6907                 goto out;
6908         status = decode_sequence(xdr, &res->seq_res, rqstp);
6909         if (status)
6910                 goto out;
6911         status = decode_free_stateid(xdr, res);
6912 out:
6913         return status;
6914 }
6915 #endif /* CONFIG_NFS_V4_1 */
6916
6917 /**
6918  * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
6919  *                      the local page cache.
6920  * @xdr: XDR stream where entry resides
6921  * @entry: buffer to fill in with entry data
6922  * @plus: boolean indicating whether this should be a readdirplus entry
6923  *
6924  * Returns zero if successful, otherwise a negative errno value is
6925  * returned.
6926  *
6927  * This function is not invoked during READDIR reply decoding, but
6928  * rather whenever an application invokes the getdents(2) system call
6929  * on a directory already in our cache.
6930  */
6931 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
6932                        int plus)
6933 {
6934         uint32_t bitmap[3] = {0};
6935         uint32_t len;
6936         __be32 *p = xdr_inline_decode(xdr, 4);
6937         if (unlikely(!p))
6938                 goto out_overflow;
6939         if (*p == xdr_zero) {
6940                 p = xdr_inline_decode(xdr, 4);
6941                 if (unlikely(!p))
6942                         goto out_overflow;
6943                 if (*p == xdr_zero)
6944                         return -EAGAIN;
6945                 entry->eof = 1;
6946                 return -EBADCOOKIE;
6947         }
6948
6949         p = xdr_inline_decode(xdr, 12);
6950         if (unlikely(!p))
6951                 goto out_overflow;
6952         entry->prev_cookie = entry->cookie;
6953         p = xdr_decode_hyper(p, &entry->cookie);
6954         entry->len = be32_to_cpup(p);
6955
6956         p = xdr_inline_decode(xdr, entry->len);
6957         if (unlikely(!p))
6958                 goto out_overflow;
6959         entry->name = (const char *) p;
6960
6961         /*
6962          * In case the server doesn't return an inode number,
6963          * we fake one here.  (We don't use inode number 0,
6964          * since glibc seems to choke on it...)
6965          */
6966         entry->ino = 1;
6967         entry->fattr->valid = 0;
6968
6969         if (decode_attr_bitmap(xdr, bitmap) < 0)
6970                 goto out_overflow;
6971
6972         if (decode_attr_length(xdr, &len, &p) < 0)
6973                 goto out_overflow;
6974
6975         if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
6976                                         entry->server, 1) < 0)
6977                 goto out_overflow;
6978         if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
6979                 entry->ino = entry->fattr->mounted_on_fileid;
6980         else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
6981                 entry->ino = entry->fattr->fileid;
6982
6983         entry->d_type = DT_UNKNOWN;
6984         if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
6985                 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
6986
6987         return 0;
6988
6989 out_overflow:
6990         print_overflow_msg(__func__, xdr);
6991         return -EAGAIN;
6992 }
6993
6994 /*
6995  * We need to translate between nfs status return values and
6996  * the local errno values which may not be the same.
6997  */
6998 static struct {
6999         int stat;
7000         int errno;
7001 } nfs_errtbl[] = {
7002         { NFS4_OK,              0               },
7003         { NFS4ERR_PERM,         -EPERM          },
7004         { NFS4ERR_NOENT,        -ENOENT         },
7005         { NFS4ERR_IO,           -errno_NFSERR_IO},
7006         { NFS4ERR_NXIO,         -ENXIO          },
7007         { NFS4ERR_ACCESS,       -EACCES         },
7008         { NFS4ERR_EXIST,        -EEXIST         },
7009         { NFS4ERR_XDEV,         -EXDEV          },
7010         { NFS4ERR_NOTDIR,       -ENOTDIR        },
7011         { NFS4ERR_ISDIR,        -EISDIR         },
7012         { NFS4ERR_INVAL,        -EINVAL         },
7013         { NFS4ERR_FBIG,         -EFBIG          },
7014         { NFS4ERR_NOSPC,        -ENOSPC         },
7015         { NFS4ERR_ROFS,         -EROFS          },
7016         { NFS4ERR_MLINK,        -EMLINK         },
7017         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
7018         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
7019         { NFS4ERR_DQUOT,        -EDQUOT         },
7020         { NFS4ERR_STALE,        -ESTALE         },
7021         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
7022         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
7023         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
7024         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
7025         { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
7026         { NFS4ERR_BADTYPE,      -EBADTYPE       },
7027         { NFS4ERR_LOCKED,       -EAGAIN         },
7028         { NFS4ERR_SYMLINK,      -ELOOP          },
7029         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
7030         { NFS4ERR_DEADLOCK,     -EDEADLK        },
7031         { -1,                   -EIO            }
7032 };
7033
7034 /*
7035  * Convert an NFS error code to a local one.
7036  * This one is used jointly by NFSv2 and NFSv3.
7037  */
7038 static int
7039 nfs4_stat_to_errno(int stat)
7040 {
7041         int i;
7042         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7043                 if (nfs_errtbl[i].stat == stat)
7044                         return nfs_errtbl[i].errno;
7045         }
7046         if (stat <= 10000 || stat > 10100) {
7047                 /* The server is looney tunes. */
7048                 return -EREMOTEIO;
7049         }
7050         /* If we cannot translate the error, the recovery routines should
7051          * handle it.
7052          * Note: remaining NFSv4 error codes have values > 10000, so should
7053          * not conflict with native Linux error codes.
7054          */
7055         return -stat;
7056 }
7057
7058 #define PROC(proc, argtype, restype)                            \
7059 [NFSPROC4_CLNT_##proc] = {                                      \
7060         .p_proc   = NFSPROC4_COMPOUND,                          \
7061         .p_encode = (kxdreproc_t)nfs4_xdr_##argtype,            \
7062         .p_decode = (kxdrdproc_t)nfs4_xdr_##restype,            \
7063         .p_arglen = NFS4_##argtype##_sz,                        \
7064         .p_replen = NFS4_##restype##_sz,                        \
7065         .p_statidx = NFSPROC4_CLNT_##proc,                      \
7066         .p_name   = #proc,                                      \
7067 }
7068
7069 struct rpc_procinfo     nfs4_procedures[] = {
7070         PROC(READ,              enc_read,               dec_read),
7071         PROC(WRITE,             enc_write,              dec_write),
7072         PROC(COMMIT,            enc_commit,             dec_commit),
7073         PROC(OPEN,              enc_open,               dec_open),
7074         PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
7075         PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
7076         PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
7077         PROC(CLOSE,             enc_close,              dec_close),
7078         PROC(SETATTR,           enc_setattr,            dec_setattr),
7079         PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
7080         PROC(RENEW,             enc_renew,              dec_renew),
7081         PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
7082         PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7083         PROC(LOCK,              enc_lock,               dec_lock),
7084         PROC(LOCKT,             enc_lockt,              dec_lockt),
7085         PROC(LOCKU,             enc_locku,              dec_locku),
7086         PROC(ACCESS,            enc_access,             dec_access),
7087         PROC(GETATTR,           enc_getattr,            dec_getattr),
7088         PROC(LOOKUP,            enc_lookup,             dec_lookup),
7089         PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
7090         PROC(REMOVE,            enc_remove,             dec_remove),
7091         PROC(RENAME,            enc_rename,             dec_rename),
7092         PROC(LINK,              enc_link,               dec_link),
7093         PROC(SYMLINK,           enc_symlink,            dec_symlink),
7094         PROC(CREATE,            enc_create,             dec_create),
7095         PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
7096         PROC(STATFS,            enc_statfs,             dec_statfs),
7097         PROC(READLINK,          enc_readlink,           dec_readlink),
7098         PROC(READDIR,           enc_readdir,            dec_readdir),
7099         PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
7100         PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
7101         PROC(GETACL,            enc_getacl,             dec_getacl),
7102         PROC(SETACL,            enc_setacl,             dec_setacl),
7103         PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
7104         PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
7105         PROC(SECINFO,           enc_secinfo,            dec_secinfo),
7106 #if defined(CONFIG_NFS_V4_1)
7107         PROC(EXCHANGE_ID,       enc_exchange_id,        dec_exchange_id),
7108         PROC(CREATE_SESSION,    enc_create_session,     dec_create_session),
7109         PROC(DESTROY_SESSION,   enc_destroy_session,    dec_destroy_session),
7110         PROC(SEQUENCE,          enc_sequence,           dec_sequence),
7111         PROC(GET_LEASE_TIME,    enc_get_lease_time,     dec_get_lease_time),
7112         PROC(RECLAIM_COMPLETE,  enc_reclaim_complete,   dec_reclaim_complete),
7113         PROC(GETDEVICEINFO,     enc_getdeviceinfo,      dec_getdeviceinfo),
7114         PROC(LAYOUTGET,         enc_layoutget,          dec_layoutget),
7115         PROC(LAYOUTCOMMIT,      enc_layoutcommit,       dec_layoutcommit),
7116         PROC(LAYOUTRETURN,      enc_layoutreturn,       dec_layoutreturn),
7117         PROC(SECINFO_NO_NAME,   enc_secinfo_no_name,    dec_secinfo_no_name),
7118         PROC(TEST_STATEID,      enc_test_stateid,       dec_test_stateid),
7119         PROC(FREE_STATEID,      enc_free_stateid,       dec_free_stateid),
7120         PROC(GETDEVICELIST,     enc_getdevicelist,      dec_getdevicelist),
7121 #endif /* CONFIG_NFS_V4_1 */
7122 };
7123
7124 struct rpc_version              nfs_version4 = {
7125         .number                 = 4,
7126         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
7127         .procs                  = nfs4_procedures
7128 };
7129
7130 /*
7131  * Local variables:
7132  *  c-basic-offset: 8
7133  * End:
7134  */