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
2526         encode_nops(&hdr);
2527 }
2528
2529 /*
2530  * Encode a WRITE request
2531  */
2532 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2533                                struct nfs_writeargs *args)
2534 {
2535         struct compound_hdr hdr = {
2536                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2537         };
2538
2539         encode_compound_hdr(xdr, req, &hdr);
2540         encode_sequence(xdr, &args->seq_args, &hdr);
2541         encode_putfh(xdr, args->fh, &hdr);
2542         encode_write(xdr, args, &hdr);
2543         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2544         if (args->bitmask)
2545                 encode_getfattr(xdr, args->bitmask, &hdr);
2546         encode_nops(&hdr);
2547 }
2548
2549 /*
2550  *  a COMMIT request
2551  */
2552 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2553                                 struct nfs_writeargs *args)
2554 {
2555         struct compound_hdr hdr = {
2556                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2557         };
2558
2559         encode_compound_hdr(xdr, req, &hdr);
2560         encode_sequence(xdr, &args->seq_args, &hdr);
2561         encode_putfh(xdr, args->fh, &hdr);
2562         encode_commit(xdr, args, &hdr);
2563         if (args->bitmask)
2564                 encode_getfattr(xdr, args->bitmask, &hdr);
2565         encode_nops(&hdr);
2566 }
2567
2568 /*
2569  * FSINFO request
2570  */
2571 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2572                                 struct nfs4_fsinfo_arg *args)
2573 {
2574         struct compound_hdr hdr = {
2575                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2576         };
2577
2578         encode_compound_hdr(xdr, req, &hdr);
2579         encode_sequence(xdr, &args->seq_args, &hdr);
2580         encode_putfh(xdr, args->fh, &hdr);
2581         encode_fsinfo(xdr, args->bitmask, &hdr);
2582         encode_nops(&hdr);
2583 }
2584
2585 /*
2586  * a PATHCONF request
2587  */
2588 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2589                                   const struct nfs4_pathconf_arg *args)
2590 {
2591         struct compound_hdr hdr = {
2592                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2593         };
2594
2595         encode_compound_hdr(xdr, req, &hdr);
2596         encode_sequence(xdr, &args->seq_args, &hdr);
2597         encode_putfh(xdr, args->fh, &hdr);
2598         encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2599                            &hdr);
2600         encode_nops(&hdr);
2601 }
2602
2603 /*
2604  * a STATFS request
2605  */
2606 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2607                                 const struct nfs4_statfs_arg *args)
2608 {
2609         struct compound_hdr hdr = {
2610                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2611         };
2612
2613         encode_compound_hdr(xdr, req, &hdr);
2614         encode_sequence(xdr, &args->seq_args, &hdr);
2615         encode_putfh(xdr, args->fh, &hdr);
2616         encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2617                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2618         encode_nops(&hdr);
2619 }
2620
2621 /*
2622  * GETATTR_BITMAP request
2623  */
2624 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2625                                      struct xdr_stream *xdr,
2626                                      struct nfs4_server_caps_arg *args)
2627 {
2628         struct compound_hdr hdr = {
2629                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2630         };
2631
2632         encode_compound_hdr(xdr, req, &hdr);
2633         encode_sequence(xdr, &args->seq_args, &hdr);
2634         encode_putfh(xdr, args->fhandle, &hdr);
2635         encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2636                            FATTR4_WORD0_LINK_SUPPORT|
2637                            FATTR4_WORD0_SYMLINK_SUPPORT|
2638                            FATTR4_WORD0_ACLSUPPORT, &hdr);
2639         encode_nops(&hdr);
2640 }
2641
2642 /*
2643  * a RENEW request
2644  */
2645 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2646                                struct nfs_client *clp)
2647 {
2648         struct compound_hdr hdr = {
2649                 .nops   = 0,
2650         };
2651
2652         encode_compound_hdr(xdr, req, &hdr);
2653         encode_renew(xdr, clp, &hdr);
2654         encode_nops(&hdr);
2655 }
2656
2657 /*
2658  * a SETCLIENTID request
2659  */
2660 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2661                                      struct xdr_stream *xdr,
2662                                      struct nfs4_setclientid *sc)
2663 {
2664         struct compound_hdr hdr = {
2665                 .nops   = 0,
2666         };
2667
2668         encode_compound_hdr(xdr, req, &hdr);
2669         encode_setclientid(xdr, sc, &hdr);
2670         encode_nops(&hdr);
2671 }
2672
2673 /*
2674  * a SETCLIENTID_CONFIRM request
2675  */
2676 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2677                                              struct xdr_stream *xdr,
2678                                              struct nfs4_setclientid_res *arg)
2679 {
2680         struct compound_hdr hdr = {
2681                 .nops   = 0,
2682         };
2683         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2684
2685         encode_compound_hdr(xdr, req, &hdr);
2686         encode_setclientid_confirm(xdr, arg, &hdr);
2687         encode_putrootfh(xdr, &hdr);
2688         encode_fsinfo(xdr, lease_bitmap, &hdr);
2689         encode_nops(&hdr);
2690 }
2691
2692 /*
2693  * DELEGRETURN request
2694  */
2695 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2696                                      struct xdr_stream *xdr,
2697                                      const struct nfs4_delegreturnargs *args)
2698 {
2699         struct compound_hdr hdr = {
2700                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2701         };
2702
2703         encode_compound_hdr(xdr, req, &hdr);
2704         encode_sequence(xdr, &args->seq_args, &hdr);
2705         encode_putfh(xdr, args->fhandle, &hdr);
2706         encode_delegreturn(xdr, args->stateid, &hdr);
2707         encode_getfattr(xdr, args->bitmask, &hdr);
2708         encode_nops(&hdr);
2709 }
2710
2711 /*
2712  * Encode FS_LOCATIONS request
2713  */
2714 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2715                                       struct xdr_stream *xdr,
2716                                       struct nfs4_fs_locations_arg *args)
2717 {
2718         struct compound_hdr hdr = {
2719                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2720         };
2721         uint32_t replen;
2722
2723         encode_compound_hdr(xdr, req, &hdr);
2724         encode_sequence(xdr, &args->seq_args, &hdr);
2725         encode_putfh(xdr, args->dir_fh, &hdr);
2726         encode_lookup(xdr, args->name, &hdr);
2727         replen = hdr.replen;    /* get the attribute into args->page */
2728         encode_fs_locations(xdr, args->bitmask, &hdr);
2729
2730         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2731                         0, PAGE_SIZE);
2732         encode_nops(&hdr);
2733 }
2734
2735 /*
2736  * Encode SECINFO request
2737  */
2738 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2739                                 struct xdr_stream *xdr,
2740                                 struct nfs4_secinfo_arg *args)
2741 {
2742         struct compound_hdr hdr = {
2743                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2744         };
2745
2746         encode_compound_hdr(xdr, req, &hdr);
2747         encode_sequence(xdr, &args->seq_args, &hdr);
2748         encode_putfh(xdr, args->dir_fh, &hdr);
2749         encode_secinfo(xdr, args->name, &hdr);
2750         encode_nops(&hdr);
2751 }
2752
2753 #if defined(CONFIG_NFS_V4_1)
2754 /*
2755  * EXCHANGE_ID request
2756  */
2757 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2758                                      struct xdr_stream *xdr,
2759                                      struct nfs41_exchange_id_args *args)
2760 {
2761         struct compound_hdr hdr = {
2762                 .minorversion = args->client->cl_mvops->minor_version,
2763         };
2764
2765         encode_compound_hdr(xdr, req, &hdr);
2766         encode_exchange_id(xdr, args, &hdr);
2767         encode_nops(&hdr);
2768 }
2769
2770 /*
2771  * a CREATE_SESSION request
2772  */
2773 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2774                                         struct xdr_stream *xdr,
2775                                         struct nfs41_create_session_args *args)
2776 {
2777         struct compound_hdr hdr = {
2778                 .minorversion = args->client->cl_mvops->minor_version,
2779         };
2780
2781         encode_compound_hdr(xdr, req, &hdr);
2782         encode_create_session(xdr, args, &hdr);
2783         encode_nops(&hdr);
2784 }
2785
2786 /*
2787  * a DESTROY_SESSION request
2788  */
2789 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2790                                          struct xdr_stream *xdr,
2791                                          struct nfs4_session *session)
2792 {
2793         struct compound_hdr hdr = {
2794                 .minorversion = session->clp->cl_mvops->minor_version,
2795         };
2796
2797         encode_compound_hdr(xdr, req, &hdr);
2798         encode_destroy_session(xdr, session, &hdr);
2799         encode_nops(&hdr);
2800 }
2801
2802 /*
2803  * a SEQUENCE request
2804  */
2805 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2806                                   struct nfs4_sequence_args *args)
2807 {
2808         struct compound_hdr hdr = {
2809                 .minorversion = nfs4_xdr_minorversion(args),
2810         };
2811
2812         encode_compound_hdr(xdr, req, &hdr);
2813         encode_sequence(xdr, args, &hdr);
2814         encode_nops(&hdr);
2815 }
2816
2817 /*
2818  * a GET_LEASE_TIME request
2819  */
2820 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2821                                         struct xdr_stream *xdr,
2822                                         struct nfs4_get_lease_time_args *args)
2823 {
2824         struct compound_hdr hdr = {
2825                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2826         };
2827         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2828
2829         encode_compound_hdr(xdr, req, &hdr);
2830         encode_sequence(xdr, &args->la_seq_args, &hdr);
2831         encode_putrootfh(xdr, &hdr);
2832         encode_fsinfo(xdr, lease_bitmap, &hdr);
2833         encode_nops(&hdr);
2834 }
2835
2836 /*
2837  * a RECLAIM_COMPLETE request
2838  */
2839 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2840                                           struct xdr_stream *xdr,
2841                                 struct nfs41_reclaim_complete_args *args)
2842 {
2843         struct compound_hdr hdr = {
2844                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2845         };
2846
2847         encode_compound_hdr(xdr, req, &hdr);
2848         encode_sequence(xdr, &args->seq_args, &hdr);
2849         encode_reclaim_complete(xdr, args, &hdr);
2850         encode_nops(&hdr);
2851 }
2852
2853 /*
2854  * Encode GETDEVICELIST request
2855  */
2856 static void nfs4_xdr_enc_getdevicelist(struct rpc_rqst *req,
2857                                        struct xdr_stream *xdr,
2858                                        struct nfs4_getdevicelist_args *args)
2859 {
2860         struct compound_hdr hdr = {
2861                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2862         };
2863
2864         encode_compound_hdr(xdr, req, &hdr);
2865         encode_sequence(xdr, &args->seq_args, &hdr);
2866         encode_putfh(xdr, args->fh, &hdr);
2867         encode_getdevicelist(xdr, args, &hdr);
2868         encode_nops(&hdr);
2869 }
2870
2871 /*
2872  * Encode GETDEVICEINFO request
2873  */
2874 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2875                                        struct xdr_stream *xdr,
2876                                        struct nfs4_getdeviceinfo_args *args)
2877 {
2878         struct compound_hdr hdr = {
2879                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2880         };
2881
2882         encode_compound_hdr(xdr, req, &hdr);
2883         encode_sequence(xdr, &args->seq_args, &hdr);
2884         encode_getdeviceinfo(xdr, args, &hdr);
2885
2886         /* set up reply kvec. Subtract notification bitmap max size (2)
2887          * so that notification bitmap is put in xdr_buf tail */
2888         xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2889                          args->pdev->pages, args->pdev->pgbase,
2890                          args->pdev->pglen);
2891
2892         encode_nops(&hdr);
2893 }
2894
2895 /*
2896  *  Encode LAYOUTGET request
2897  */
2898 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2899                                    struct xdr_stream *xdr,
2900                                    struct nfs4_layoutget_args *args)
2901 {
2902         struct compound_hdr hdr = {
2903                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2904         };
2905
2906         encode_compound_hdr(xdr, req, &hdr);
2907         encode_sequence(xdr, &args->seq_args, &hdr);
2908         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2909         encode_layoutget(xdr, args, &hdr);
2910
2911         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2912             args->layout.pages, 0, args->layout.pglen);
2913
2914         encode_nops(&hdr);
2915 }
2916
2917 /*
2918  *  Encode LAYOUTCOMMIT request
2919  */
2920 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2921                                       struct xdr_stream *xdr,
2922                                       struct nfs4_layoutcommit_args *args)
2923 {
2924         struct nfs4_layoutcommit_data *data =
2925                 container_of(args, struct nfs4_layoutcommit_data, args);
2926         struct compound_hdr hdr = {
2927                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2928         };
2929
2930         encode_compound_hdr(xdr, req, &hdr);
2931         encode_sequence(xdr, &args->seq_args, &hdr);
2932         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2933         encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2934         encode_getfattr(xdr, args->bitmask, &hdr);
2935         encode_nops(&hdr);
2936 }
2937
2938 /*
2939  * Encode LAYOUTRETURN request
2940  */
2941 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2942                                       struct xdr_stream *xdr,
2943                                       struct nfs4_layoutreturn_args *args)
2944 {
2945         struct compound_hdr hdr = {
2946                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2947         };
2948
2949         encode_compound_hdr(xdr, req, &hdr);
2950         encode_sequence(xdr, &args->seq_args, &hdr);
2951         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2952         encode_layoutreturn(xdr, args, &hdr);
2953         encode_nops(&hdr);
2954 }
2955
2956 /*
2957  * Encode SECINFO_NO_NAME request
2958  */
2959 static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
2960                                         struct xdr_stream *xdr,
2961                                         struct nfs41_secinfo_no_name_args *args)
2962 {
2963         struct compound_hdr hdr = {
2964                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2965         };
2966
2967         encode_compound_hdr(xdr, req, &hdr);
2968         encode_sequence(xdr, &args->seq_args, &hdr);
2969         encode_putrootfh(xdr, &hdr);
2970         encode_secinfo_no_name(xdr, args, &hdr);
2971         encode_nops(&hdr);
2972         return 0;
2973 }
2974
2975 /*
2976  *  Encode TEST_STATEID request
2977  */
2978 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
2979                                       struct xdr_stream *xdr,
2980                                       struct nfs41_test_stateid_args *args)
2981 {
2982         struct compound_hdr hdr = {
2983                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2984         };
2985
2986         encode_compound_hdr(xdr, req, &hdr);
2987         encode_sequence(xdr, &args->seq_args, &hdr);
2988         encode_test_stateid(xdr, args, &hdr);
2989         encode_nops(&hdr);
2990 }
2991
2992 /*
2993  *  Encode FREE_STATEID request
2994  */
2995 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
2996                                      struct xdr_stream *xdr,
2997                                      struct nfs41_free_stateid_args *args)
2998 {
2999         struct compound_hdr hdr = {
3000                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3001         };
3002
3003         encode_compound_hdr(xdr, req, &hdr);
3004         encode_sequence(xdr, &args->seq_args, &hdr);
3005         encode_free_stateid(xdr, args, &hdr);
3006         encode_nops(&hdr);
3007 }
3008 #endif /* CONFIG_NFS_V4_1 */
3009
3010 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
3011 {
3012         dprintk("nfs: %s: prematurely hit end of receive buffer. "
3013                 "Remaining buffer length is %tu words.\n",
3014                 func, xdr->end - xdr->p);
3015 }
3016
3017 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3018 {
3019         __be32 *p;
3020
3021         p = xdr_inline_decode(xdr, 4);
3022         if (unlikely(!p))
3023                 goto out_overflow;
3024         *len = be32_to_cpup(p);
3025         p = xdr_inline_decode(xdr, *len);
3026         if (unlikely(!p))
3027                 goto out_overflow;
3028         *string = (char *)p;
3029         return 0;
3030 out_overflow:
3031         print_overflow_msg(__func__, xdr);
3032         return -EIO;
3033 }
3034
3035 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3036 {
3037         __be32 *p;
3038
3039         p = xdr_inline_decode(xdr, 8);
3040         if (unlikely(!p))
3041                 goto out_overflow;
3042         hdr->status = be32_to_cpup(p++);
3043         hdr->taglen = be32_to_cpup(p);
3044
3045         p = xdr_inline_decode(xdr, hdr->taglen + 4);
3046         if (unlikely(!p))
3047                 goto out_overflow;
3048         hdr->tag = (char *)p;
3049         p += XDR_QUADLEN(hdr->taglen);
3050         hdr->nops = be32_to_cpup(p);
3051         if (unlikely(hdr->nops < 1))
3052                 return nfs4_stat_to_errno(hdr->status);
3053         return 0;
3054 out_overflow:
3055         print_overflow_msg(__func__, xdr);
3056         return -EIO;
3057 }
3058
3059 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3060 {
3061         __be32 *p;
3062         uint32_t opnum;
3063         int32_t nfserr;
3064
3065         p = xdr_inline_decode(xdr, 8);
3066         if (unlikely(!p))
3067                 goto out_overflow;
3068         opnum = be32_to_cpup(p++);
3069         if (opnum != expected) {
3070                 dprintk("nfs: Server returned operation"
3071                         " %d but we issued a request for %d\n",
3072                                 opnum, expected);
3073                 return -EIO;
3074         }
3075         nfserr = be32_to_cpup(p);
3076         if (nfserr != NFS_OK)
3077                 return nfs4_stat_to_errno(nfserr);
3078         return 0;
3079 out_overflow:
3080         print_overflow_msg(__func__, xdr);
3081         return -EIO;
3082 }
3083
3084 /* Dummy routine */
3085 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
3086 {
3087         __be32 *p;
3088         unsigned int strlen;
3089         char *str;
3090
3091         p = xdr_inline_decode(xdr, 12);
3092         if (likely(p))
3093                 return decode_opaque_inline(xdr, &strlen, &str);
3094         print_overflow_msg(__func__, xdr);
3095         return -EIO;
3096 }
3097
3098 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3099 {
3100         uint32_t bmlen;
3101         __be32 *p;
3102
3103         p = xdr_inline_decode(xdr, 4);
3104         if (unlikely(!p))
3105                 goto out_overflow;
3106         bmlen = be32_to_cpup(p);
3107
3108         bitmap[0] = bitmap[1] = bitmap[2] = 0;
3109         p = xdr_inline_decode(xdr, (bmlen << 2));
3110         if (unlikely(!p))
3111                 goto out_overflow;
3112         if (bmlen > 0) {
3113                 bitmap[0] = be32_to_cpup(p++);
3114                 if (bmlen > 1) {
3115                         bitmap[1] = be32_to_cpup(p++);
3116                         if (bmlen > 2)
3117                                 bitmap[2] = be32_to_cpup(p);
3118                 }
3119         }
3120         return 0;
3121 out_overflow:
3122         print_overflow_msg(__func__, xdr);
3123         return -EIO;
3124 }
3125
3126 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
3127 {
3128         __be32 *p;
3129
3130         p = xdr_inline_decode(xdr, 4);
3131         if (unlikely(!p))
3132                 goto out_overflow;
3133         *attrlen = be32_to_cpup(p);
3134         *savep = xdr->p;
3135         return 0;
3136 out_overflow:
3137         print_overflow_msg(__func__, xdr);
3138         return -EIO;
3139 }
3140
3141 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3142 {
3143         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3144                 int ret;
3145                 ret = decode_attr_bitmap(xdr, bitmask);
3146                 if (unlikely(ret < 0))
3147                         return ret;
3148                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3149         } else
3150                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3151         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3152                 bitmask[0], bitmask[1], bitmask[2]);
3153         return 0;
3154 }
3155
3156 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3157 {
3158         __be32 *p;
3159         int ret = 0;
3160
3161         *type = 0;
3162         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3163                 return -EIO;
3164         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3165                 p = xdr_inline_decode(xdr, 4);
3166                 if (unlikely(!p))
3167                         goto out_overflow;
3168                 *type = be32_to_cpup(p);
3169                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3170                         dprintk("%s: bad type %d\n", __func__, *type);
3171                         return -EIO;
3172                 }
3173                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3174                 ret = NFS_ATTR_FATTR_TYPE;
3175         }
3176         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3177         return ret;
3178 out_overflow:
3179         print_overflow_msg(__func__, xdr);
3180         return -EIO;
3181 }
3182
3183 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3184 {
3185         __be32 *p;
3186         int ret = 0;
3187
3188         *change = 0;
3189         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3190                 return -EIO;
3191         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3192                 p = xdr_inline_decode(xdr, 8);
3193                 if (unlikely(!p))
3194                         goto out_overflow;
3195                 xdr_decode_hyper(p, change);
3196                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3197                 ret = NFS_ATTR_FATTR_CHANGE;
3198         }
3199         dprintk("%s: change attribute=%Lu\n", __func__,
3200                         (unsigned long long)*change);
3201         return ret;
3202 out_overflow:
3203         print_overflow_msg(__func__, xdr);
3204         return -EIO;
3205 }
3206
3207 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3208 {
3209         __be32 *p;
3210         int ret = 0;
3211
3212         *size = 0;
3213         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3214                 return -EIO;
3215         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3216                 p = xdr_inline_decode(xdr, 8);
3217                 if (unlikely(!p))
3218                         goto out_overflow;
3219                 xdr_decode_hyper(p, size);
3220                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3221                 ret = NFS_ATTR_FATTR_SIZE;
3222         }
3223         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3224         return ret;
3225 out_overflow:
3226         print_overflow_msg(__func__, xdr);
3227         return -EIO;
3228 }
3229
3230 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3231 {
3232         __be32 *p;
3233
3234         *res = 0;
3235         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3236                 return -EIO;
3237         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3238                 p = xdr_inline_decode(xdr, 4);
3239                 if (unlikely(!p))
3240                         goto out_overflow;
3241                 *res = be32_to_cpup(p);
3242                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3243         }
3244         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3245         return 0;
3246 out_overflow:
3247         print_overflow_msg(__func__, xdr);
3248         return -EIO;
3249 }
3250
3251 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3252 {
3253         __be32 *p;
3254
3255         *res = 0;
3256         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3257                 return -EIO;
3258         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3259                 p = xdr_inline_decode(xdr, 4);
3260                 if (unlikely(!p))
3261                         goto out_overflow;
3262                 *res = be32_to_cpup(p);
3263                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3264         }
3265         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3266         return 0;
3267 out_overflow:
3268         print_overflow_msg(__func__, xdr);
3269         return -EIO;
3270 }
3271
3272 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3273 {
3274         __be32 *p;
3275         int ret = 0;
3276
3277         fsid->major = 0;
3278         fsid->minor = 0;
3279         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3280                 return -EIO;
3281         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3282                 p = xdr_inline_decode(xdr, 16);
3283                 if (unlikely(!p))
3284                         goto out_overflow;
3285                 p = xdr_decode_hyper(p, &fsid->major);
3286                 xdr_decode_hyper(p, &fsid->minor);
3287                 bitmap[0] &= ~FATTR4_WORD0_FSID;
3288                 ret = NFS_ATTR_FATTR_FSID;
3289         }
3290         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3291                         (unsigned long long)fsid->major,
3292                         (unsigned long long)fsid->minor);
3293         return ret;
3294 out_overflow:
3295         print_overflow_msg(__func__, xdr);
3296         return -EIO;
3297 }
3298
3299 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3300 {
3301         __be32 *p;
3302
3303         *res = 60;
3304         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3305                 return -EIO;
3306         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3307                 p = xdr_inline_decode(xdr, 4);
3308                 if (unlikely(!p))
3309                         goto out_overflow;
3310                 *res = be32_to_cpup(p);
3311                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3312         }
3313         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3314         return 0;
3315 out_overflow:
3316         print_overflow_msg(__func__, xdr);
3317         return -EIO;
3318 }
3319
3320 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3321 {
3322         __be32 *p;
3323
3324         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3325                 return -EIO;
3326         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3327                 p = xdr_inline_decode(xdr, 4);
3328                 if (unlikely(!p))
3329                         goto out_overflow;
3330                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3331                 *res = -be32_to_cpup(p);
3332         }
3333         return 0;
3334 out_overflow:
3335         print_overflow_msg(__func__, xdr);
3336         return -EIO;
3337 }
3338
3339 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3340 {
3341         __be32 *p;
3342         int len;
3343
3344         if (fh != NULL)
3345                 memset(fh, 0, sizeof(*fh));
3346
3347         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3348                 return -EIO;
3349         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3350                 p = xdr_inline_decode(xdr, 4);
3351                 if (unlikely(!p))
3352                         goto out_overflow;
3353                 len = be32_to_cpup(p);
3354                 if (len > NFS4_FHSIZE)
3355                         return -EIO;
3356                 p = xdr_inline_decode(xdr, len);
3357                 if (unlikely(!p))
3358                         goto out_overflow;
3359                 if (fh != NULL) {
3360                         memcpy(fh->data, p, len);
3361                         fh->size = len;
3362                 }
3363                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3364         }
3365         return 0;
3366 out_overflow:
3367         print_overflow_msg(__func__, xdr);
3368         return -EIO;
3369 }
3370
3371 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3372 {
3373         __be32 *p;
3374
3375         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
3376         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3377                 return -EIO;
3378         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3379                 p = xdr_inline_decode(xdr, 4);
3380                 if (unlikely(!p))
3381                         goto out_overflow;
3382                 *res = be32_to_cpup(p);
3383                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3384         }
3385         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3386         return 0;
3387 out_overflow:
3388         print_overflow_msg(__func__, xdr);
3389         return -EIO;
3390 }
3391
3392 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3393 {
3394         __be32 *p;
3395         int ret = 0;
3396
3397         *fileid = 0;
3398         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3399                 return -EIO;
3400         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3401                 p = xdr_inline_decode(xdr, 8);
3402                 if (unlikely(!p))
3403                         goto out_overflow;
3404                 xdr_decode_hyper(p, fileid);
3405                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3406                 ret = NFS_ATTR_FATTR_FILEID;
3407         }
3408         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3409         return ret;
3410 out_overflow:
3411         print_overflow_msg(__func__, xdr);
3412         return -EIO;
3413 }
3414
3415 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3416 {
3417         __be32 *p;
3418         int ret = 0;
3419
3420         *fileid = 0;
3421         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3422                 return -EIO;
3423         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3424                 p = xdr_inline_decode(xdr, 8);
3425                 if (unlikely(!p))
3426                         goto out_overflow;
3427                 xdr_decode_hyper(p, fileid);
3428                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3429                 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3430         }
3431         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3432         return ret;
3433 out_overflow:
3434         print_overflow_msg(__func__, xdr);
3435         return -EIO;
3436 }
3437
3438 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3439 {
3440         __be32 *p;
3441         int status = 0;
3442
3443         *res = 0;
3444         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3445                 return -EIO;
3446         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3447                 p = xdr_inline_decode(xdr, 8);
3448                 if (unlikely(!p))
3449                         goto out_overflow;
3450                 xdr_decode_hyper(p, res);
3451                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3452         }
3453         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3454         return status;
3455 out_overflow:
3456         print_overflow_msg(__func__, xdr);
3457         return -EIO;
3458 }
3459
3460 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3461 {
3462         __be32 *p;
3463         int status = 0;
3464
3465         *res = 0;
3466         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3467                 return -EIO;
3468         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3469                 p = xdr_inline_decode(xdr, 8);
3470                 if (unlikely(!p))
3471                         goto out_overflow;
3472                 xdr_decode_hyper(p, res);
3473                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3474         }
3475         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3476         return status;
3477 out_overflow:
3478         print_overflow_msg(__func__, xdr);
3479         return -EIO;
3480 }
3481
3482 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3483 {
3484         __be32 *p;
3485         int status = 0;
3486
3487         *res = 0;
3488         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3489                 return -EIO;
3490         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3491                 p = xdr_inline_decode(xdr, 8);
3492                 if (unlikely(!p))
3493                         goto out_overflow;
3494                 xdr_decode_hyper(p, res);
3495                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3496         }
3497         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3498         return status;
3499 out_overflow:
3500         print_overflow_msg(__func__, xdr);
3501         return -EIO;
3502 }
3503
3504 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3505 {
3506         u32 n;
3507         __be32 *p;
3508         int status = 0;
3509
3510         p = xdr_inline_decode(xdr, 4);
3511         if (unlikely(!p))
3512                 goto out_overflow;
3513         n = be32_to_cpup(p);
3514         if (n == 0)
3515                 goto root_path;
3516         dprintk("path ");
3517         path->ncomponents = 0;
3518         while (path->ncomponents < n) {
3519                 struct nfs4_string *component = &path->components[path->ncomponents];
3520                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3521                 if (unlikely(status != 0))
3522                         goto out_eio;
3523                 if (path->ncomponents != n)
3524                         dprintk("/");
3525                 dprintk("%s", component->data);
3526                 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
3527                         path->ncomponents++;
3528                 else {
3529                         dprintk("cannot parse %d components in path\n", n);
3530                         goto out_eio;
3531                 }
3532         }
3533 out:
3534         dprintk("\n");
3535         return status;
3536 root_path:
3537 /* a root pathname is sent as a zero component4 */
3538         path->ncomponents = 1;
3539         path->components[0].len=0;
3540         path->components[0].data=NULL;
3541         dprintk("path /\n");
3542         goto out;
3543 out_eio:
3544         dprintk(" status %d", status);
3545         status = -EIO;
3546         goto out;
3547 out_overflow:
3548         print_overflow_msg(__func__, xdr);
3549         return -EIO;
3550 }
3551
3552 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3553 {
3554         int n;
3555         __be32 *p;
3556         int status = -EIO;
3557
3558         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3559                 goto out;
3560         status = 0;
3561         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3562                 goto out;
3563         dprintk("%s: fsroot ", __func__);
3564         status = decode_pathname(xdr, &res->fs_path);
3565         if (unlikely(status != 0))
3566                 goto out;
3567         p = xdr_inline_decode(xdr, 4);
3568         if (unlikely(!p))
3569                 goto out_overflow;
3570         n = be32_to_cpup(p);
3571         if (n <= 0)
3572                 goto out_eio;
3573         res->nlocations = 0;
3574         while (res->nlocations < n) {
3575                 u32 m;
3576                 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
3577
3578                 p = xdr_inline_decode(xdr, 4);
3579                 if (unlikely(!p))
3580                         goto out_overflow;
3581                 m = be32_to_cpup(p);
3582
3583                 loc->nservers = 0;
3584                 dprintk("%s: servers ", __func__);
3585                 while (loc->nservers < m) {
3586                         struct nfs4_string *server = &loc->servers[loc->nservers];
3587                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3588                         if (unlikely(status != 0))
3589                                 goto out_eio;
3590                         dprintk("%s ", server->data);
3591                         if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
3592                                 loc->nservers++;
3593                         else {
3594                                 unsigned int i;
3595                                 dprintk("%s: using first %u of %u servers "
3596                                         "returned for location %u\n",
3597                                                 __func__,
3598                                                 NFS4_FS_LOCATION_MAXSERVERS,
3599                                                 m, res->nlocations);
3600                                 for (i = loc->nservers; i < m; i++) {
3601                                         unsigned int len;
3602                                         char *data;
3603                                         status = decode_opaque_inline(xdr, &len, &data);
3604                                         if (unlikely(status != 0))
3605                                                 goto out_eio;
3606                                 }
3607                         }
3608                 }
3609                 status = decode_pathname(xdr, &loc->rootpath);
3610                 if (unlikely(status != 0))
3611                         goto out_eio;
3612                 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
3613                         res->nlocations++;
3614         }
3615         if (res->nlocations != 0)
3616                 status = NFS_ATTR_FATTR_V4_REFERRAL;
3617 out:
3618         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3619         return status;
3620 out_overflow:
3621         print_overflow_msg(__func__, xdr);
3622 out_eio:
3623         status = -EIO;
3624         goto out;
3625 }
3626
3627 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3628 {
3629         __be32 *p;
3630         int status = 0;
3631
3632         *res = 0;
3633         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3634                 return -EIO;
3635         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3636                 p = xdr_inline_decode(xdr, 8);
3637                 if (unlikely(!p))
3638                         goto out_overflow;
3639                 xdr_decode_hyper(p, res);
3640                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3641         }
3642         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3643         return status;
3644 out_overflow:
3645         print_overflow_msg(__func__, xdr);
3646         return -EIO;
3647 }
3648
3649 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3650 {
3651         __be32 *p;
3652         int status = 0;
3653
3654         *maxlink = 1;
3655         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3656                 return -EIO;
3657         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3658                 p = xdr_inline_decode(xdr, 4);
3659                 if (unlikely(!p))
3660                         goto out_overflow;
3661                 *maxlink = be32_to_cpup(p);
3662                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3663         }
3664         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3665         return status;
3666 out_overflow:
3667         print_overflow_msg(__func__, xdr);
3668         return -EIO;
3669 }
3670
3671 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3672 {
3673         __be32 *p;
3674         int status = 0;
3675
3676         *maxname = 1024;
3677         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3678                 return -EIO;
3679         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3680                 p = xdr_inline_decode(xdr, 4);
3681                 if (unlikely(!p))
3682                         goto out_overflow;
3683                 *maxname = be32_to_cpup(p);
3684                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3685         }
3686         dprintk("%s: maxname=%u\n", __func__, *maxname);
3687         return status;
3688 out_overflow:
3689         print_overflow_msg(__func__, xdr);
3690         return -EIO;
3691 }
3692
3693 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3694 {
3695         __be32 *p;
3696         int status = 0;
3697
3698         *res = 1024;
3699         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3700                 return -EIO;
3701         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3702                 uint64_t maxread;
3703                 p = xdr_inline_decode(xdr, 8);
3704                 if (unlikely(!p))
3705                         goto out_overflow;
3706                 xdr_decode_hyper(p, &maxread);
3707                 if (maxread > 0x7FFFFFFF)
3708                         maxread = 0x7FFFFFFF;
3709                 *res = (uint32_t)maxread;
3710                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3711         }
3712         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3713         return status;
3714 out_overflow:
3715         print_overflow_msg(__func__, xdr);
3716         return -EIO;
3717 }
3718
3719 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3720 {
3721         __be32 *p;
3722         int status = 0;
3723
3724         *res = 1024;
3725         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3726                 return -EIO;
3727         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3728                 uint64_t maxwrite;
3729                 p = xdr_inline_decode(xdr, 8);
3730                 if (unlikely(!p))
3731                         goto out_overflow;
3732                 xdr_decode_hyper(p, &maxwrite);
3733                 if (maxwrite > 0x7FFFFFFF)
3734                         maxwrite = 0x7FFFFFFF;
3735                 *res = (uint32_t)maxwrite;
3736                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3737         }
3738         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3739         return status;
3740 out_overflow:
3741         print_overflow_msg(__func__, xdr);
3742         return -EIO;
3743 }
3744
3745 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3746 {
3747         uint32_t tmp;
3748         __be32 *p;
3749         int ret = 0;
3750
3751         *mode = 0;
3752         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3753                 return -EIO;
3754         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3755                 p = xdr_inline_decode(xdr, 4);
3756                 if (unlikely(!p))
3757                         goto out_overflow;
3758                 tmp = be32_to_cpup(p);
3759                 *mode = tmp & ~S_IFMT;
3760                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3761                 ret = NFS_ATTR_FATTR_MODE;
3762         }
3763         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3764         return ret;
3765 out_overflow:
3766         print_overflow_msg(__func__, xdr);
3767         return -EIO;
3768 }
3769
3770 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3771 {
3772         __be32 *p;
3773         int ret = 0;
3774
3775         *nlink = 1;
3776         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3777                 return -EIO;
3778         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3779                 p = xdr_inline_decode(xdr, 4);
3780                 if (unlikely(!p))
3781                         goto out_overflow;
3782                 *nlink = be32_to_cpup(p);
3783                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3784                 ret = NFS_ATTR_FATTR_NLINK;
3785         }
3786         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3787         return ret;
3788 out_overflow:
3789         print_overflow_msg(__func__, xdr);
3790         return -EIO;
3791 }
3792
3793 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3794                 const struct nfs_server *server, uint32_t *uid, int may_sleep)
3795 {
3796         uint32_t len;
3797         __be32 *p;
3798         int ret = 0;
3799
3800         *uid = -2;
3801         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3802                 return -EIO;
3803         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3804                 p = xdr_inline_decode(xdr, 4);
3805                 if (unlikely(!p))
3806                         goto out_overflow;
3807                 len = be32_to_cpup(p);
3808                 p = xdr_inline_decode(xdr, len);
3809                 if (unlikely(!p))
3810                         goto out_overflow;
3811                 if (!may_sleep) {
3812                         /* do nothing */
3813                 } else if (len < XDR_MAX_NETOBJ) {
3814                         if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3815                                 ret = NFS_ATTR_FATTR_OWNER;
3816                         else
3817                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3818                                                 __func__);
3819                 } else
3820                         dprintk("%s: name too long (%u)!\n",
3821                                         __func__, len);
3822                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3823         }
3824         dprintk("%s: uid=%d\n", __func__, (int)*uid);
3825         return ret;
3826 out_overflow:
3827         print_overflow_msg(__func__, xdr);
3828         return -EIO;
3829 }
3830
3831 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3832                 const struct nfs_server *server, uint32_t *gid, int may_sleep)
3833 {
3834         uint32_t len;
3835         __be32 *p;
3836         int ret = 0;
3837
3838         *gid = -2;
3839         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3840                 return -EIO;
3841         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3842                 p = xdr_inline_decode(xdr, 4);
3843                 if (unlikely(!p))
3844                         goto out_overflow;
3845                 len = be32_to_cpup(p);
3846                 p = xdr_inline_decode(xdr, len);
3847                 if (unlikely(!p))
3848                         goto out_overflow;
3849                 if (!may_sleep) {
3850                         /* do nothing */
3851                 } else if (len < XDR_MAX_NETOBJ) {
3852                         if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3853                                 ret = NFS_ATTR_FATTR_GROUP;
3854                         else
3855                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3856                                                 __func__);
3857                 } else
3858                         dprintk("%s: name too long (%u)!\n",
3859                                         __func__, len);
3860                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3861         }
3862         dprintk("%s: gid=%d\n", __func__, (int)*gid);
3863         return ret;
3864 out_overflow:
3865         print_overflow_msg(__func__, xdr);
3866         return -EIO;
3867 }
3868
3869 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3870 {
3871         uint32_t major = 0, minor = 0;
3872         __be32 *p;
3873         int ret = 0;
3874
3875         *rdev = MKDEV(0,0);
3876         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3877                 return -EIO;
3878         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3879                 dev_t tmp;
3880
3881                 p = xdr_inline_decode(xdr, 8);
3882                 if (unlikely(!p))
3883                         goto out_overflow;
3884                 major = be32_to_cpup(p++);
3885                 minor = be32_to_cpup(p);
3886                 tmp = MKDEV(major, minor);
3887                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3888                         *rdev = tmp;
3889                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3890                 ret = NFS_ATTR_FATTR_RDEV;
3891         }
3892         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3893         return ret;
3894 out_overflow:
3895         print_overflow_msg(__func__, xdr);
3896         return -EIO;
3897 }
3898
3899 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3900 {
3901         __be32 *p;
3902         int status = 0;
3903
3904         *res = 0;
3905         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3906                 return -EIO;
3907         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3908                 p = xdr_inline_decode(xdr, 8);
3909                 if (unlikely(!p))
3910                         goto out_overflow;
3911                 xdr_decode_hyper(p, res);
3912                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3913         }
3914         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3915         return status;
3916 out_overflow:
3917         print_overflow_msg(__func__, xdr);
3918         return -EIO;
3919 }
3920
3921 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3922 {
3923         __be32 *p;
3924         int status = 0;
3925
3926         *res = 0;
3927         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3928                 return -EIO;
3929         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3930                 p = xdr_inline_decode(xdr, 8);
3931                 if (unlikely(!p))
3932                         goto out_overflow;
3933                 xdr_decode_hyper(p, res);
3934                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3935         }
3936         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3937         return status;
3938 out_overflow:
3939         print_overflow_msg(__func__, xdr);
3940         return -EIO;
3941 }
3942
3943 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3944 {
3945         __be32 *p;
3946         int status = 0;
3947
3948         *res = 0;
3949         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3950                 return -EIO;
3951         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3952                 p = xdr_inline_decode(xdr, 8);
3953                 if (unlikely(!p))
3954                         goto out_overflow;
3955                 xdr_decode_hyper(p, res);
3956                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3957         }
3958         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3959         return status;
3960 out_overflow:
3961         print_overflow_msg(__func__, xdr);
3962         return -EIO;
3963 }
3964
3965 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3966 {
3967         __be32 *p;
3968         int ret = 0;
3969
3970         *used = 0;
3971         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3972                 return -EIO;
3973         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3974                 p = xdr_inline_decode(xdr, 8);
3975                 if (unlikely(!p))
3976                         goto out_overflow;
3977                 xdr_decode_hyper(p, used);
3978                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3979                 ret = NFS_ATTR_FATTR_SPACE_USED;
3980         }
3981         dprintk("%s: space used=%Lu\n", __func__,
3982                         (unsigned long long)*used);
3983         return ret;
3984 out_overflow:
3985         print_overflow_msg(__func__, xdr);
3986         return -EIO;
3987 }
3988
3989 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
3990 {
3991         __be32 *p;
3992         uint64_t sec;
3993         uint32_t nsec;
3994
3995         p = xdr_inline_decode(xdr, 12);
3996         if (unlikely(!p))
3997                 goto out_overflow;
3998         p = xdr_decode_hyper(p, &sec);
3999         nsec = be32_to_cpup(p);
4000         time->tv_sec = (time_t)sec;
4001         time->tv_nsec = (long)nsec;
4002         return 0;
4003 out_overflow:
4004         print_overflow_msg(__func__, xdr);
4005         return -EIO;
4006 }
4007
4008 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4009 {
4010         int status = 0;
4011
4012         time->tv_sec = 0;
4013         time->tv_nsec = 0;
4014         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4015                 return -EIO;
4016         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4017                 status = decode_attr_time(xdr, time);
4018                 if (status == 0)
4019                         status = NFS_ATTR_FATTR_ATIME;
4020                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4021         }
4022         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4023         return status;
4024 }
4025
4026 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4027 {
4028         int status = 0;
4029
4030         time->tv_sec = 0;
4031         time->tv_nsec = 0;
4032         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4033                 return -EIO;
4034         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4035                 status = decode_attr_time(xdr, time);
4036                 if (status == 0)
4037                         status = NFS_ATTR_FATTR_CTIME;
4038                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4039         }
4040         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4041         return status;
4042 }
4043
4044 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4045                                   struct timespec *time)
4046 {
4047         int status = 0;
4048
4049         time->tv_sec = 0;
4050         time->tv_nsec = 0;
4051         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4052                 return -EIO;
4053         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4054                 status = decode_attr_time(xdr, time);
4055                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4056         }
4057         dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4058                 (long)time->tv_nsec);
4059         return status;
4060 }
4061
4062 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4063 {
4064         int status = 0;
4065
4066         time->tv_sec = 0;
4067         time->tv_nsec = 0;
4068         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4069                 return -EIO;
4070         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4071                 status = decode_attr_time(xdr, time);
4072                 if (status == 0)
4073                         status = NFS_ATTR_FATTR_MTIME;
4074                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4075         }
4076         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4077         return status;
4078 }
4079
4080 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
4081 {
4082         unsigned int attrwords = XDR_QUADLEN(attrlen);
4083         unsigned int nwords = xdr->p - savep;
4084
4085         if (unlikely(attrwords != nwords)) {
4086                 dprintk("%s: server returned incorrect attribute length: "
4087                         "%u %c %u\n",
4088                                 __func__,
4089                                 attrwords << 2,
4090                                 (attrwords < nwords) ? '<' : '>',
4091                                 nwords << 2);
4092                 return -EIO;
4093         }
4094         return 0;
4095 }
4096
4097 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4098 {
4099         __be32 *p;
4100
4101         p = xdr_inline_decode(xdr, 20);
4102         if (unlikely(!p))
4103                 goto out_overflow;
4104         cinfo->atomic = be32_to_cpup(p++);
4105         p = xdr_decode_hyper(p, &cinfo->before);
4106         xdr_decode_hyper(p, &cinfo->after);
4107         return 0;
4108 out_overflow:
4109         print_overflow_msg(__func__, xdr);
4110         return -EIO;
4111 }
4112
4113 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
4114 {
4115         __be32 *p;
4116         uint32_t supp, acc;
4117         int status;
4118
4119         status = decode_op_hdr(xdr, OP_ACCESS);
4120         if (status)
4121                 return status;
4122         p = xdr_inline_decode(xdr, 8);
4123         if (unlikely(!p))
4124                 goto out_overflow;
4125         supp = be32_to_cpup(p++);
4126         acc = be32_to_cpup(p);
4127         access->supported = supp;
4128         access->access = acc;
4129         return 0;
4130 out_overflow:
4131         print_overflow_msg(__func__, xdr);
4132         return -EIO;
4133 }
4134
4135 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4136 {
4137         __be32 *p;
4138
4139         p = xdr_inline_decode(xdr, len);
4140         if (likely(p)) {
4141                 memcpy(buf, p, len);
4142                 return 0;
4143         }
4144         print_overflow_msg(__func__, xdr);
4145         return -EIO;
4146 }
4147
4148 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4149 {
4150         return decode_opaque_fixed(xdr, stateid->data, NFS4_STATEID_SIZE);
4151 }
4152
4153 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4154 {
4155         int status;
4156
4157         status = decode_op_hdr(xdr, OP_CLOSE);
4158         if (status != -EIO)
4159                 nfs_increment_open_seqid(status, res->seqid);
4160         if (!status)
4161                 status = decode_stateid(xdr, &res->stateid);
4162         return status;
4163 }
4164
4165 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4166 {
4167         return decode_opaque_fixed(xdr, verifier, 8);
4168 }
4169
4170 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
4171 {
4172         int status;
4173
4174         status = decode_op_hdr(xdr, OP_COMMIT);
4175         if (!status)
4176                 status = decode_verifier(xdr, res->verf->verifier);
4177         return status;
4178 }
4179
4180 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4181 {
4182         __be32 *p;
4183         uint32_t bmlen;
4184         int status;
4185
4186         status = decode_op_hdr(xdr, OP_CREATE);
4187         if (status)
4188                 return status;
4189         if ((status = decode_change_info(xdr, cinfo)))
4190                 return status;
4191         p = xdr_inline_decode(xdr, 4);
4192         if (unlikely(!p))
4193                 goto out_overflow;
4194         bmlen = be32_to_cpup(p);
4195         p = xdr_inline_decode(xdr, bmlen << 2);
4196         if (likely(p))
4197                 return 0;
4198 out_overflow:
4199         print_overflow_msg(__func__, xdr);
4200         return -EIO;
4201 }
4202
4203 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4204 {
4205         __be32 *savep;
4206         uint32_t attrlen, bitmap[3] = {0};
4207         int status;
4208
4209         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4210                 goto xdr_error;
4211         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4212                 goto xdr_error;
4213         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4214                 goto xdr_error;
4215         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4216                 goto xdr_error;
4217         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4218                 goto xdr_error;
4219         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4220                 goto xdr_error;
4221         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4222                 goto xdr_error;
4223         status = verify_attr_len(xdr, savep, attrlen);
4224 xdr_error:
4225         dprintk("%s: xdr returned %d!\n", __func__, -status);
4226         return status;
4227 }
4228
4229 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4230 {
4231         __be32 *savep;
4232         uint32_t attrlen, bitmap[3] = {0};
4233         int status;
4234
4235         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4236                 goto xdr_error;
4237         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4238                 goto xdr_error;
4239         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4240                 goto xdr_error;
4241
4242         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4243                 goto xdr_error;
4244         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4245                 goto xdr_error;
4246         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4247                 goto xdr_error;
4248         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4249                 goto xdr_error;
4250         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4251                 goto xdr_error;
4252         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4253                 goto xdr_error;
4254
4255         status = verify_attr_len(xdr, savep, attrlen);
4256 xdr_error:
4257         dprintk("%s: xdr returned %d!\n", __func__, -status);
4258         return status;
4259 }
4260
4261 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4262 {
4263         __be32 *savep;
4264         uint32_t attrlen, bitmap[3] = {0};
4265         int status;
4266
4267         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4268                 goto xdr_error;
4269         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4270                 goto xdr_error;
4271         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4272                 goto xdr_error;
4273
4274         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4275                 goto xdr_error;
4276         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4277                 goto xdr_error;
4278
4279         status = verify_attr_len(xdr, savep, attrlen);
4280 xdr_error:
4281         dprintk("%s: xdr returned %d!\n", __func__, -status);
4282         return status;
4283 }
4284
4285 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4286                 struct nfs_fattr *fattr, struct nfs_fh *fh,
4287                 const struct nfs_server *server, int may_sleep)
4288 {
4289         int status;
4290         umode_t fmode = 0;
4291         uint32_t type;
4292         int32_t err;
4293
4294         status = decode_attr_type(xdr, bitmap, &type);
4295         if (status < 0)
4296                 goto xdr_error;
4297         fattr->mode = 0;
4298         if (status != 0) {
4299                 fattr->mode |= nfs_type2fmt[type];
4300                 fattr->valid |= status;
4301         }
4302
4303         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4304         if (status < 0)
4305                 goto xdr_error;
4306         fattr->valid |= status;
4307
4308         status = decode_attr_size(xdr, bitmap, &fattr->size);
4309         if (status < 0)
4310                 goto xdr_error;
4311         fattr->valid |= status;
4312
4313         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4314         if (status < 0)
4315                 goto xdr_error;
4316         fattr->valid |= status;
4317
4318         err = 0;
4319         status = decode_attr_error(xdr, bitmap, &err);
4320         if (status < 0)
4321                 goto xdr_error;
4322         if (err == -NFS4ERR_WRONGSEC)
4323                 nfs_fixup_secinfo_attributes(fattr, fh);
4324
4325         status = decode_attr_filehandle(xdr, bitmap, fh);
4326         if (status < 0)
4327                 goto xdr_error;
4328
4329         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4330         if (status < 0)
4331                 goto xdr_error;
4332         fattr->valid |= status;
4333
4334         status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
4335                                                 struct nfs4_fs_locations,
4336                                                 fattr));
4337         if (status < 0)
4338                 goto xdr_error;
4339         fattr->valid |= status;
4340
4341         status = decode_attr_mode(xdr, bitmap, &fmode);
4342         if (status < 0)
4343                 goto xdr_error;
4344         if (status != 0) {
4345                 fattr->mode |= fmode;
4346                 fattr->valid |= status;
4347         }
4348
4349         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4350         if (status < 0)
4351                 goto xdr_error;
4352         fattr->valid |= status;
4353
4354         status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, may_sleep);
4355         if (status < 0)
4356                 goto xdr_error;
4357         fattr->valid |= status;
4358
4359         status = decode_attr_group(xdr, bitmap, server, &fattr->gid, may_sleep);
4360         if (status < 0)
4361                 goto xdr_error;
4362         fattr->valid |= status;
4363
4364         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4365         if (status < 0)
4366                 goto xdr_error;
4367         fattr->valid |= status;
4368
4369         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4370         if (status < 0)
4371                 goto xdr_error;
4372         fattr->valid |= status;
4373
4374         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4375         if (status < 0)
4376                 goto xdr_error;
4377         fattr->valid |= status;
4378
4379         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4380         if (status < 0)
4381                 goto xdr_error;
4382         fattr->valid |= status;
4383
4384         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4385         if (status < 0)
4386                 goto xdr_error;
4387         fattr->valid |= status;
4388
4389         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4390         if (status < 0)
4391                 goto xdr_error;
4392         fattr->valid |= status;
4393
4394 xdr_error:
4395         dprintk("%s: xdr returned %d\n", __func__, -status);
4396         return status;
4397 }
4398
4399 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4400                 struct nfs_fh *fh, const struct nfs_server *server, int may_sleep)
4401 {
4402         __be32 *savep;
4403         uint32_t attrlen,
4404                  bitmap[3] = {0};
4405         int status;
4406
4407         status = decode_op_hdr(xdr, OP_GETATTR);
4408         if (status < 0)
4409                 goto xdr_error;
4410
4411         status = decode_attr_bitmap(xdr, bitmap);
4412         if (status < 0)
4413                 goto xdr_error;
4414
4415         status = decode_attr_length(xdr, &attrlen, &savep);
4416         if (status < 0)
4417                 goto xdr_error;
4418
4419         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, server, may_sleep);
4420         if (status < 0)
4421                 goto xdr_error;
4422
4423         status = verify_attr_len(xdr, savep, attrlen);
4424 xdr_error:
4425         dprintk("%s: xdr returned %d\n", __func__, -status);
4426         return status;
4427 }
4428
4429 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4430                 const struct nfs_server *server, int may_sleep)
4431 {
4432         return decode_getfattr_generic(xdr, fattr, NULL, server, may_sleep);
4433 }
4434
4435 /*
4436  * Decode potentially multiple layout types. Currently we only support
4437  * one layout driver per file system.
4438  */
4439 static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4440                                          uint32_t *layouttype)
4441 {
4442         uint32_t *p;
4443         int num;
4444
4445         p = xdr_inline_decode(xdr, 4);
4446         if (unlikely(!p))
4447                 goto out_overflow;
4448         num = be32_to_cpup(p);
4449
4450         /* pNFS is not supported by the underlying file system */
4451         if (num == 0) {
4452                 *layouttype = 0;
4453                 return 0;
4454         }
4455         if (num > 1)
4456                 printk(KERN_INFO "%s: Warning: Multiple pNFS layout drivers "
4457                         "per filesystem not supported\n", __func__);
4458
4459         /* Decode and set first layout type, move xdr->p past unused types */
4460         p = xdr_inline_decode(xdr, num * 4);
4461         if (unlikely(!p))
4462                 goto out_overflow;
4463         *layouttype = be32_to_cpup(p);
4464         return 0;
4465 out_overflow:
4466         print_overflow_msg(__func__, xdr);
4467         return -EIO;
4468 }
4469
4470 /*
4471  * The type of file system exported.
4472  * Note we must ensure that layouttype is set in any non-error case.
4473  */
4474 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4475                                 uint32_t *layouttype)
4476 {
4477         int status = 0;
4478
4479         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4480         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4481                 return -EIO;
4482         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4483                 status = decode_first_pnfs_layout_type(xdr, layouttype);
4484                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4485         } else
4486                 *layouttype = 0;
4487         return status;
4488 }
4489
4490 /*
4491  * The prefered block size for layout directed io
4492  */
4493 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4494                                       uint32_t *res)
4495 {
4496         __be32 *p;
4497
4498         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4499         *res = 0;
4500         if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4501                 p = xdr_inline_decode(xdr, 4);
4502                 if (unlikely(!p)) {
4503                         print_overflow_msg(__func__, xdr);
4504                         return -EIO;
4505                 }
4506                 *res = be32_to_cpup(p);
4507                 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4508         }
4509         return 0;
4510 }
4511
4512 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4513 {
4514         __be32 *savep;
4515         uint32_t attrlen, bitmap[3];
4516         int status;
4517
4518         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4519                 goto xdr_error;
4520         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4521                 goto xdr_error;
4522         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4523                 goto xdr_error;
4524
4525         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4526
4527         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4528                 goto xdr_error;
4529         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4530                 goto xdr_error;
4531         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4532                 goto xdr_error;
4533         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4534         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4535                 goto xdr_error;
4536         fsinfo->wtpref = fsinfo->wtmax;
4537         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4538         if (status != 0)
4539                 goto xdr_error;
4540         status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4541         if (status != 0)
4542                 goto xdr_error;
4543         status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4544         if (status)
4545                 goto xdr_error;
4546
4547         status = verify_attr_len(xdr, savep, attrlen);
4548 xdr_error:
4549         dprintk("%s: xdr returned %d!\n", __func__, -status);
4550         return status;
4551 }
4552
4553 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4554 {
4555         __be32 *p;
4556         uint32_t len;
4557         int status;
4558
4559         /* Zero handle first to allow comparisons */
4560         memset(fh, 0, sizeof(*fh));
4561
4562         status = decode_op_hdr(xdr, OP_GETFH);
4563         if (status)
4564                 return status;
4565
4566         p = xdr_inline_decode(xdr, 4);
4567         if (unlikely(!p))
4568                 goto out_overflow;
4569         len = be32_to_cpup(p);
4570         if (len > NFS4_FHSIZE)
4571                 return -EIO;
4572         fh->size = len;
4573         p = xdr_inline_decode(xdr, len);
4574         if (unlikely(!p))
4575                 goto out_overflow;
4576         memcpy(fh->data, p, len);
4577         return 0;
4578 out_overflow:
4579         print_overflow_msg(__func__, xdr);
4580         return -EIO;
4581 }
4582
4583 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4584 {
4585         int status;
4586
4587         status = decode_op_hdr(xdr, OP_LINK);
4588         if (status)
4589                 return status;
4590         return decode_change_info(xdr, cinfo);
4591 }
4592
4593 /*
4594  * We create the owner, so we know a proper owner.id length is 4.
4595  */
4596 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4597 {
4598         uint64_t offset, length, clientid;
4599         __be32 *p;
4600         uint32_t namelen, type;
4601
4602         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4603         if (unlikely(!p))
4604                 goto out_overflow;
4605         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4606         p = xdr_decode_hyper(p, &length);
4607         type = be32_to_cpup(p++); /* 4 byte read */
4608         if (fl != NULL) { /* manipulate file lock */
4609                 fl->fl_start = (loff_t)offset;
4610                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4611                 if (length == ~(uint64_t)0)
4612                         fl->fl_end = OFFSET_MAX;
4613                 fl->fl_type = F_WRLCK;
4614                 if (type & 1)
4615                         fl->fl_type = F_RDLCK;
4616                 fl->fl_pid = 0;
4617         }
4618         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4619         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4620         p = xdr_inline_decode(xdr, namelen); /* variable size field */
4621         if (likely(p))
4622                 return -NFS4ERR_DENIED;
4623 out_overflow:
4624         print_overflow_msg(__func__, xdr);
4625         return -EIO;
4626 }
4627
4628 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4629 {
4630         int status;
4631
4632         status = decode_op_hdr(xdr, OP_LOCK);
4633         if (status == -EIO)
4634                 goto out;
4635         if (status == 0) {
4636                 status = decode_stateid(xdr, &res->stateid);
4637                 if (unlikely(status))
4638                         goto out;
4639         } else if (status == -NFS4ERR_DENIED)
4640                 status = decode_lock_denied(xdr, NULL);
4641         if (res->open_seqid != NULL)
4642                 nfs_increment_open_seqid(status, res->open_seqid);
4643         nfs_increment_lock_seqid(status, res->lock_seqid);
4644 out:
4645         return status;
4646 }
4647
4648 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4649 {
4650         int status;
4651         status = decode_op_hdr(xdr, OP_LOCKT);
4652         if (status == -NFS4ERR_DENIED)
4653                 return decode_lock_denied(xdr, res->denied);
4654         return status;
4655 }
4656
4657 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4658 {
4659         int status;
4660
4661         status = decode_op_hdr(xdr, OP_LOCKU);
4662         if (status != -EIO)
4663                 nfs_increment_lock_seqid(status, res->seqid);
4664         if (status == 0)
4665                 status = decode_stateid(xdr, &res->stateid);
4666         return status;
4667 }
4668
4669 static int decode_release_lockowner(struct xdr_stream *xdr)
4670 {
4671         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4672 }
4673
4674 static int decode_lookup(struct xdr_stream *xdr)
4675 {
4676         return decode_op_hdr(xdr, OP_LOOKUP);
4677 }
4678
4679 /* This is too sick! */
4680 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4681 {
4682         __be32 *p;
4683         uint32_t limit_type, nblocks, blocksize;
4684
4685         p = xdr_inline_decode(xdr, 12);
4686         if (unlikely(!p))
4687                 goto out_overflow;
4688         limit_type = be32_to_cpup(p++);
4689         switch (limit_type) {
4690         case 1:
4691                 xdr_decode_hyper(p, maxsize);
4692                 break;
4693         case 2:
4694                 nblocks = be32_to_cpup(p++);
4695                 blocksize = be32_to_cpup(p);
4696                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4697         }
4698         return 0;
4699 out_overflow:
4700         print_overflow_msg(__func__, xdr);
4701         return -EIO;
4702 }
4703
4704 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4705 {
4706         __be32 *p;
4707         uint32_t delegation_type;
4708         int status;
4709
4710         p = xdr_inline_decode(xdr, 4);
4711         if (unlikely(!p))
4712                 goto out_overflow;
4713         delegation_type = be32_to_cpup(p);
4714         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4715                 res->delegation_type = 0;
4716                 return 0;
4717         }
4718         status = decode_stateid(xdr, &res->delegation);
4719         if (unlikely(status))
4720                 return status;
4721         p = xdr_inline_decode(xdr, 4);
4722         if (unlikely(!p))
4723                 goto out_overflow;
4724         res->do_recall = be32_to_cpup(p);
4725
4726         switch (delegation_type) {
4727         case NFS4_OPEN_DELEGATE_READ:
4728                 res->delegation_type = FMODE_READ;
4729                 break;
4730         case NFS4_OPEN_DELEGATE_WRITE:
4731                 res->delegation_type = FMODE_WRITE|FMODE_READ;
4732                 if (decode_space_limit(xdr, &res->maxsize) < 0)
4733                                 return -EIO;
4734         }
4735         return decode_ace(xdr, NULL, res->server->nfs_client);
4736 out_overflow:
4737         print_overflow_msg(__func__, xdr);
4738         return -EIO;
4739 }
4740
4741 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
4742 {
4743         __be32 *p;
4744         uint32_t savewords, bmlen, i;
4745         int status;
4746
4747         status = decode_op_hdr(xdr, OP_OPEN);
4748         if (status != -EIO)
4749                 nfs_increment_open_seqid(status, res->seqid);
4750         if (!status)
4751                 status = decode_stateid(xdr, &res->stateid);
4752         if (unlikely(status))
4753                 return status;
4754
4755         decode_change_info(xdr, &res->cinfo);
4756
4757         p = xdr_inline_decode(xdr, 8);
4758         if (unlikely(!p))
4759                 goto out_overflow;
4760         res->rflags = be32_to_cpup(p++);
4761         bmlen = be32_to_cpup(p);
4762         if (bmlen > 10)
4763                 goto xdr_error;
4764
4765         p = xdr_inline_decode(xdr, bmlen << 2);
4766         if (unlikely(!p))
4767                 goto out_overflow;
4768         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
4769         for (i = 0; i < savewords; ++i)
4770                 res->attrset[i] = be32_to_cpup(p++);
4771         for (; i < NFS4_BITMAP_SIZE; i++)
4772                 res->attrset[i] = 0;
4773
4774         return decode_delegation(xdr, res);
4775 xdr_error:
4776         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
4777         return -EIO;
4778 out_overflow:
4779         print_overflow_msg(__func__, xdr);
4780         return -EIO;
4781 }
4782
4783 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
4784 {
4785         int status;
4786
4787         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
4788         if (status != -EIO)
4789                 nfs_increment_open_seqid(status, res->seqid);
4790         if (!status)
4791                 status = decode_stateid(xdr, &res->stateid);
4792         return status;
4793 }
4794
4795 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
4796 {
4797         int status;
4798
4799         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
4800         if (status != -EIO)
4801                 nfs_increment_open_seqid(status, res->seqid);
4802         if (!status)
4803                 status = decode_stateid(xdr, &res->stateid);
4804         return status;
4805 }
4806
4807 static int decode_putfh(struct xdr_stream *xdr)
4808 {
4809         return decode_op_hdr(xdr, OP_PUTFH);
4810 }
4811
4812 static int decode_putrootfh(struct xdr_stream *xdr)
4813 {
4814         return decode_op_hdr(xdr, OP_PUTROOTFH);
4815 }
4816
4817 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
4818 {
4819         struct kvec *iov = req->rq_rcv_buf.head;
4820         __be32 *p;
4821         uint32_t count, eof, recvd, hdrlen;
4822         int status;
4823
4824         status = decode_op_hdr(xdr, OP_READ);
4825         if (status)
4826                 return status;
4827         p = xdr_inline_decode(xdr, 8);
4828         if (unlikely(!p))
4829                 goto out_overflow;
4830         eof = be32_to_cpup(p++);
4831         count = be32_to_cpup(p);
4832         hdrlen = (u8 *) xdr->p - (u8 *) iov->iov_base;
4833         recvd = req->rq_rcv_buf.len - hdrlen;
4834         if (count > recvd) {
4835                 dprintk("NFS: server cheating in read reply: "
4836                                 "count %u > recvd %u\n", count, recvd);
4837                 count = recvd;
4838                 eof = 0;
4839         }
4840         xdr_read_pages(xdr, count);
4841         res->eof = eof;
4842         res->count = count;
4843         return 0;
4844 out_overflow:
4845         print_overflow_msg(__func__, xdr);
4846         return -EIO;
4847 }
4848
4849 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
4850 {
4851         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
4852         struct kvec     *iov = rcvbuf->head;
4853         size_t          hdrlen;
4854         u32             recvd, pglen = rcvbuf->page_len;
4855         int             status;
4856
4857         status = decode_op_hdr(xdr, OP_READDIR);
4858         if (!status)
4859                 status = decode_verifier(xdr, readdir->verifier.data);
4860         if (unlikely(status))
4861                 return status;
4862         dprintk("%s: verifier = %08x:%08x\n",
4863                         __func__,
4864                         ((u32 *)readdir->verifier.data)[0],
4865                         ((u32 *)readdir->verifier.data)[1]);
4866
4867
4868         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4869         recvd = rcvbuf->len - hdrlen;
4870         if (pglen > recvd)
4871                 pglen = recvd;
4872         xdr_read_pages(xdr, pglen);
4873
4874
4875         return pglen;
4876 }
4877
4878 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
4879 {
4880         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4881         struct kvec *iov = rcvbuf->head;
4882         size_t hdrlen;
4883         u32 len, recvd;
4884         __be32 *p;
4885         int status;
4886
4887         status = decode_op_hdr(xdr, OP_READLINK);
4888         if (status)
4889                 return status;
4890
4891         /* Convert length of symlink */
4892         p = xdr_inline_decode(xdr, 4);
4893         if (unlikely(!p))
4894                 goto out_overflow;
4895         len = be32_to_cpup(p);
4896         if (len >= rcvbuf->page_len || len <= 0) {
4897                 dprintk("nfs: server returned giant symlink!\n");
4898                 return -ENAMETOOLONG;
4899         }
4900         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4901         recvd = req->rq_rcv_buf.len - hdrlen;
4902         if (recvd < len) {
4903                 dprintk("NFS: server cheating in readlink reply: "
4904                                 "count %u > recvd %u\n", len, recvd);
4905                 return -EIO;
4906         }
4907         xdr_read_pages(xdr, len);
4908         /*
4909          * The XDR encode routine has set things up so that
4910          * the link text will be copied directly into the
4911          * buffer.  We just have to do overflow-checking,
4912          * and and null-terminate the text (the VFS expects
4913          * null-termination).
4914          */
4915         xdr_terminate_string(rcvbuf, len);
4916         return 0;
4917 out_overflow:
4918         print_overflow_msg(__func__, xdr);
4919         return -EIO;
4920 }
4921
4922 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4923 {
4924         int status;
4925
4926         status = decode_op_hdr(xdr, OP_REMOVE);
4927         if (status)
4928                 goto out;
4929         status = decode_change_info(xdr, cinfo);
4930 out:
4931         return status;
4932 }
4933
4934 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
4935               struct nfs4_change_info *new_cinfo)
4936 {
4937         int status;
4938
4939         status = decode_op_hdr(xdr, OP_RENAME);
4940         if (status)
4941                 goto out;
4942         if ((status = decode_change_info(xdr, old_cinfo)))
4943                 goto out;
4944         status = decode_change_info(xdr, new_cinfo);
4945 out:
4946         return status;
4947 }
4948
4949 static int decode_renew(struct xdr_stream *xdr)
4950 {
4951         return decode_op_hdr(xdr, OP_RENEW);
4952 }
4953
4954 static int
4955 decode_restorefh(struct xdr_stream *xdr)
4956 {
4957         return decode_op_hdr(xdr, OP_RESTOREFH);
4958 }
4959
4960 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
4961                          struct nfs_getaclres *res)
4962 {
4963         __be32 *savep, *bm_p;
4964         uint32_t attrlen,
4965                  bitmap[3] = {0};
4966         struct kvec *iov = req->rq_rcv_buf.head;
4967         int status;
4968
4969         res->acl_len = 0;
4970         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4971                 goto out;
4972         bm_p = xdr->p;
4973         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4974                 goto out;
4975         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4976                 goto out;
4977
4978         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
4979                 return -EIO;
4980         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
4981                 size_t hdrlen;
4982                 u32 recvd;
4983
4984                 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
4985                  * are stored with the acl data to handle the problem of
4986                  * variable length bitmaps.*/
4987                 xdr->p = bm_p;
4988                 res->acl_data_offset = be32_to_cpup(bm_p) + 2;
4989                 res->acl_data_offset <<= 2;
4990
4991                 /* We ignore &savep and don't do consistency checks on
4992                  * the attr length.  Let userspace figure it out.... */
4993                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
4994                 attrlen += res->acl_data_offset;
4995                 recvd = req->rq_rcv_buf.len - hdrlen;
4996                 if (attrlen > recvd) {
4997                         if (res->acl_flags & NFS4_ACL_LEN_REQUEST) {
4998                                 /* getxattr interface called with a NULL buf */
4999                                 res->acl_len = attrlen;
5000                                 goto out;
5001                         }
5002                         dprintk("NFS: acl reply: attrlen %u > recvd %u\n",
5003                                         attrlen, recvd);
5004                         return -EINVAL;
5005                 }
5006                 xdr_read_pages(xdr, attrlen);
5007                 res->acl_len = attrlen;
5008         } else
5009                 status = -EOPNOTSUPP;
5010
5011 out:
5012         return status;
5013 }
5014
5015 static int
5016 decode_savefh(struct xdr_stream *xdr)
5017 {
5018         return decode_op_hdr(xdr, OP_SAVEFH);
5019 }
5020
5021 static int decode_setattr(struct xdr_stream *xdr)
5022 {
5023         __be32 *p;
5024         uint32_t bmlen;
5025         int status;
5026
5027         status = decode_op_hdr(xdr, OP_SETATTR);
5028         if (status)
5029                 return status;
5030         p = xdr_inline_decode(xdr, 4);
5031         if (unlikely(!p))
5032                 goto out_overflow;
5033         bmlen = be32_to_cpup(p);
5034         p = xdr_inline_decode(xdr, bmlen << 2);
5035         if (likely(p))
5036                 return 0;
5037 out_overflow:
5038         print_overflow_msg(__func__, xdr);
5039         return -EIO;
5040 }
5041
5042 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5043 {
5044         __be32 *p;
5045         uint32_t opnum;
5046         int32_t nfserr;
5047
5048         p = xdr_inline_decode(xdr, 8);
5049         if (unlikely(!p))
5050                 goto out_overflow;
5051         opnum = be32_to_cpup(p++);
5052         if (opnum != OP_SETCLIENTID) {
5053                 dprintk("nfs: decode_setclientid: Server returned operation"
5054                         " %d\n", opnum);
5055                 return -EIO;
5056         }
5057         nfserr = be32_to_cpup(p);
5058         if (nfserr == NFS_OK) {
5059                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5060                 if (unlikely(!p))
5061                         goto out_overflow;
5062                 p = xdr_decode_hyper(p, &res->clientid);
5063                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5064         } else if (nfserr == NFSERR_CLID_INUSE) {
5065                 uint32_t len;
5066
5067                 /* skip netid string */
5068                 p = xdr_inline_decode(xdr, 4);
5069                 if (unlikely(!p))
5070                         goto out_overflow;
5071                 len = be32_to_cpup(p);
5072                 p = xdr_inline_decode(xdr, len);
5073                 if (unlikely(!p))
5074                         goto out_overflow;
5075
5076                 /* skip uaddr string */
5077                 p = xdr_inline_decode(xdr, 4);
5078                 if (unlikely(!p))
5079                         goto out_overflow;
5080                 len = be32_to_cpup(p);
5081                 p = xdr_inline_decode(xdr, len);
5082                 if (unlikely(!p))
5083                         goto out_overflow;
5084                 return -NFSERR_CLID_INUSE;
5085         } else
5086                 return nfs4_stat_to_errno(nfserr);
5087
5088         return 0;
5089 out_overflow:
5090         print_overflow_msg(__func__, xdr);
5091         return -EIO;
5092 }
5093
5094 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5095 {
5096         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5097 }
5098
5099 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
5100 {
5101         __be32 *p;
5102         int status;
5103
5104         status = decode_op_hdr(xdr, OP_WRITE);
5105         if (status)
5106                 return status;
5107
5108         p = xdr_inline_decode(xdr, 16);
5109         if (unlikely(!p))
5110                 goto out_overflow;
5111         res->count = be32_to_cpup(p++);
5112         res->verf->committed = be32_to_cpup(p++);
5113         memcpy(res->verf->verifier, p, 8);
5114         return 0;
5115 out_overflow:
5116         print_overflow_msg(__func__, xdr);
5117         return -EIO;
5118 }
5119
5120 static int decode_delegreturn(struct xdr_stream *xdr)
5121 {
5122         return decode_op_hdr(xdr, OP_DELEGRETURN);
5123 }
5124
5125 static int decode_secinfo_gss(struct xdr_stream *xdr, struct nfs4_secinfo_flavor *flavor)
5126 {
5127         __be32 *p;
5128
5129         p = xdr_inline_decode(xdr, 4);
5130         if (unlikely(!p))
5131                 goto out_overflow;
5132         flavor->gss.sec_oid4.len = be32_to_cpup(p);
5133         if (flavor->gss.sec_oid4.len > GSS_OID_MAX_LEN)
5134                 goto out_err;
5135
5136         p = xdr_inline_decode(xdr, flavor->gss.sec_oid4.len);
5137         if (unlikely(!p))
5138                 goto out_overflow;
5139         memcpy(flavor->gss.sec_oid4.data, p, flavor->gss.sec_oid4.len);
5140
5141         p = xdr_inline_decode(xdr, 8);
5142         if (unlikely(!p))
5143                 goto out_overflow;
5144         flavor->gss.qop4 = be32_to_cpup(p++);
5145         flavor->gss.service = be32_to_cpup(p);
5146
5147         return 0;
5148
5149 out_overflow:
5150         print_overflow_msg(__func__, xdr);
5151         return -EIO;
5152 out_err:
5153         return -EINVAL;
5154 }
5155
5156 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5157 {
5158         struct nfs4_secinfo_flavor *sec_flavor;
5159         int status;
5160         __be32 *p;
5161         int i, num_flavors;
5162
5163         status = decode_op_hdr(xdr, OP_SECINFO);
5164         if (status)
5165                 goto out;
5166         p = xdr_inline_decode(xdr, 4);
5167         if (unlikely(!p))
5168                 goto out_overflow;
5169
5170         res->flavors->num_flavors = 0;
5171         num_flavors = be32_to_cpup(p);
5172
5173         for (i = 0; i < num_flavors; i++) {
5174                 sec_flavor = &res->flavors->flavors[i];
5175                 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5176                         break;
5177
5178                 p = xdr_inline_decode(xdr, 4);
5179                 if (unlikely(!p))
5180                         goto out_overflow;
5181                 sec_flavor->flavor = be32_to_cpup(p);
5182
5183                 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5184                         status = decode_secinfo_gss(xdr, sec_flavor);
5185                         if (status)
5186                                 goto out;
5187                 }
5188                 res->flavors->num_flavors++;
5189         }
5190
5191 out:
5192         return status;
5193 out_overflow:
5194         print_overflow_msg(__func__, xdr);
5195         return -EIO;
5196 }
5197
5198 #if defined(CONFIG_NFS_V4_1)
5199 static int decode_exchange_id(struct xdr_stream *xdr,
5200                               struct nfs41_exchange_id_res *res)
5201 {
5202         __be32 *p;
5203         uint32_t dummy;
5204         char *dummy_str;
5205         int status;
5206         struct nfs_client *clp = res->client;
5207
5208         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5209         if (status)
5210                 return status;
5211
5212         p = xdr_inline_decode(xdr, 8);
5213         if (unlikely(!p))
5214                 goto out_overflow;
5215         xdr_decode_hyper(p, &clp->cl_clientid);
5216         p = xdr_inline_decode(xdr, 12);
5217         if (unlikely(!p))
5218                 goto out_overflow;
5219         clp->cl_seqid = be32_to_cpup(p++);
5220         clp->cl_exchange_flags = be32_to_cpup(p++);
5221
5222         /* We ask for SP4_NONE */
5223         dummy = be32_to_cpup(p);
5224         if (dummy != SP4_NONE)
5225                 return -EIO;
5226
5227         /* Throw away minor_id */
5228         p = xdr_inline_decode(xdr, 8);
5229         if (unlikely(!p))
5230                 goto out_overflow;
5231
5232         /* Throw away Major id */
5233         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5234         if (unlikely(status))
5235                 return status;
5236
5237         /* Save server_scope */
5238         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5239         if (unlikely(status))
5240                 return status;
5241
5242         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5243                 return -EIO;
5244
5245         memcpy(res->server_scope->server_scope, dummy_str, dummy);
5246         res->server_scope->server_scope_sz = dummy;
5247
5248         /* Throw away Implementation id array */
5249         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5250         if (unlikely(status))
5251                 return status;
5252
5253         return 0;
5254 out_overflow:
5255         print_overflow_msg(__func__, xdr);
5256         return -EIO;
5257 }
5258
5259 static int decode_chan_attrs(struct xdr_stream *xdr,
5260                              struct nfs4_channel_attrs *attrs)
5261 {
5262         __be32 *p;
5263         u32 nr_attrs, val;
5264
5265         p = xdr_inline_decode(xdr, 28);
5266         if (unlikely(!p))
5267                 goto out_overflow;
5268         val = be32_to_cpup(p++);        /* headerpadsz */
5269         if (val)
5270                 return -EINVAL;         /* no support for header padding yet */
5271         attrs->max_rqst_sz = be32_to_cpup(p++);
5272         attrs->max_resp_sz = be32_to_cpup(p++);
5273         attrs->max_resp_sz_cached = be32_to_cpup(p++);
5274         attrs->max_ops = be32_to_cpup(p++);
5275         attrs->max_reqs = be32_to_cpup(p++);
5276         nr_attrs = be32_to_cpup(p);
5277         if (unlikely(nr_attrs > 1)) {
5278                 printk(KERN_WARNING "%s: Invalid rdma channel attrs count %u\n",
5279                         __func__, nr_attrs);
5280                 return -EINVAL;
5281         }
5282         if (nr_attrs == 1) {
5283                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5284                 if (unlikely(!p))
5285                         goto out_overflow;
5286         }
5287         return 0;
5288 out_overflow:
5289         print_overflow_msg(__func__, xdr);
5290         return -EIO;
5291 }
5292
5293 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5294 {
5295         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5296 }
5297
5298 static int decode_create_session(struct xdr_stream *xdr,
5299                                  struct nfs41_create_session_res *res)
5300 {
5301         __be32 *p;
5302         int status;
5303         struct nfs_client *clp = res->client;
5304         struct nfs4_session *session = clp->cl_session;
5305
5306         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5307         if (!status)
5308                 status = decode_sessionid(xdr, &session->sess_id);
5309         if (unlikely(status))
5310                 return status;
5311
5312         /* seqid, flags */
5313         p = xdr_inline_decode(xdr, 8);
5314         if (unlikely(!p))
5315                 goto out_overflow;
5316         clp->cl_seqid = be32_to_cpup(p++);
5317         session->flags = be32_to_cpup(p);
5318
5319         /* Channel attributes */
5320         status = decode_chan_attrs(xdr, &session->fc_attrs);
5321         if (!status)
5322                 status = decode_chan_attrs(xdr, &session->bc_attrs);
5323         return status;
5324 out_overflow:
5325         print_overflow_msg(__func__, xdr);
5326         return -EIO;
5327 }
5328
5329 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5330 {
5331         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5332 }
5333
5334 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5335 {
5336         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5337 }
5338 #endif /* CONFIG_NFS_V4_1 */
5339
5340 static int decode_sequence(struct xdr_stream *xdr,
5341                            struct nfs4_sequence_res *res,
5342                            struct rpc_rqst *rqstp)
5343 {
5344 #if defined(CONFIG_NFS_V4_1)
5345         struct nfs4_sessionid id;
5346         u32 dummy;
5347         int status;
5348         __be32 *p;
5349
5350         if (!res->sr_session)
5351                 return 0;
5352
5353         status = decode_op_hdr(xdr, OP_SEQUENCE);
5354         if (!status)
5355                 status = decode_sessionid(xdr, &id);
5356         if (unlikely(status))
5357                 goto out_err;
5358
5359         /*
5360          * If the server returns different values for sessionID, slotID or
5361          * sequence number, the server is looney tunes.
5362          */
5363         status = -EREMOTEIO;
5364
5365         if (memcmp(id.data, res->sr_session->sess_id.data,
5366                    NFS4_MAX_SESSIONID_LEN)) {
5367                 dprintk("%s Invalid session id\n", __func__);
5368                 goto out_err;
5369         }
5370
5371         p = xdr_inline_decode(xdr, 20);
5372         if (unlikely(!p))
5373                 goto out_overflow;
5374
5375         /* seqid */
5376         dummy = be32_to_cpup(p++);
5377         if (dummy != res->sr_slot->seq_nr) {
5378                 dprintk("%s Invalid sequence number\n", __func__);
5379                 goto out_err;
5380         }
5381         /* slot id */
5382         dummy = be32_to_cpup(p++);
5383         if (dummy != res->sr_slot - res->sr_session->fc_slot_table.slots) {
5384                 dprintk("%s Invalid slot id\n", __func__);
5385                 goto out_err;
5386         }
5387         /* highest slot id - currently not processed */
5388         dummy = be32_to_cpup(p++);
5389         /* target highest slot id - currently not processed */
5390         dummy = be32_to_cpup(p++);
5391         /* result flags */
5392         res->sr_status_flags = be32_to_cpup(p);
5393         status = 0;
5394 out_err:
5395         res->sr_status = status;
5396         return status;
5397 out_overflow:
5398         print_overflow_msg(__func__, xdr);
5399         status = -EIO;
5400         goto out_err;
5401 #else  /* CONFIG_NFS_V4_1 */
5402         return 0;
5403 #endif /* CONFIG_NFS_V4_1 */
5404 }
5405
5406 #if defined(CONFIG_NFS_V4_1)
5407 /*
5408  * TODO: Need to handle case when EOF != true;
5409  */
5410 static int decode_getdevicelist(struct xdr_stream *xdr,
5411                                 struct pnfs_devicelist *res)
5412 {
5413         __be32 *p;
5414         int status, i;
5415         struct nfs_writeverf verftemp;
5416
5417         status = decode_op_hdr(xdr, OP_GETDEVICELIST);
5418         if (status)
5419                 return status;
5420
5421         p = xdr_inline_decode(xdr, 8 + 8 + 4);
5422         if (unlikely(!p))
5423                 goto out_overflow;
5424
5425         /* TODO: Skip cookie for now */
5426         p += 2;
5427
5428         /* Read verifier */
5429         p = xdr_decode_opaque_fixed(p, verftemp.verifier, 8);
5430
5431         res->num_devs = be32_to_cpup(p);
5432
5433         dprintk("%s: num_dev %d\n", __func__, res->num_devs);
5434
5435         if (res->num_devs > NFS4_PNFS_GETDEVLIST_MAXNUM) {
5436                 printk(KERN_ERR "%s too many result dev_num %u\n",
5437                                 __func__, res->num_devs);
5438                 return -EIO;
5439         }
5440
5441         p = xdr_inline_decode(xdr,
5442                               res->num_devs * NFS4_DEVICEID4_SIZE + 4);
5443         if (unlikely(!p))
5444                 goto out_overflow;
5445         for (i = 0; i < res->num_devs; i++)
5446                 p = xdr_decode_opaque_fixed(p, res->dev_id[i].data,
5447                                             NFS4_DEVICEID4_SIZE);
5448         res->eof = be32_to_cpup(p);
5449         return 0;
5450 out_overflow:
5451         print_overflow_msg(__func__, xdr);
5452         return -EIO;
5453 }
5454
5455 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5456                                 struct pnfs_device *pdev)
5457 {
5458         __be32 *p;
5459         uint32_t len, type;
5460         int status;
5461
5462         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5463         if (status) {
5464                 if (status == -ETOOSMALL) {
5465                         p = xdr_inline_decode(xdr, 4);
5466                         if (unlikely(!p))
5467                                 goto out_overflow;
5468                         pdev->mincount = be32_to_cpup(p);
5469                         dprintk("%s: Min count too small. mincnt = %u\n",
5470                                 __func__, pdev->mincount);
5471                 }
5472                 return status;
5473         }
5474
5475         p = xdr_inline_decode(xdr, 8);
5476         if (unlikely(!p))
5477                 goto out_overflow;
5478         type = be32_to_cpup(p++);
5479         if (type != pdev->layout_type) {
5480                 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5481                         __func__, pdev->layout_type, type);
5482                 return -EINVAL;
5483         }
5484         /*
5485          * Get the length of the opaque device_addr4. xdr_read_pages places
5486          * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5487          * and places the remaining xdr data in xdr_buf->tail
5488          */
5489         pdev->mincount = be32_to_cpup(p);
5490         xdr_read_pages(xdr, pdev->mincount); /* include space for the length */
5491
5492         /* Parse notification bitmap, verifying that it is zero. */
5493         p = xdr_inline_decode(xdr, 4);
5494         if (unlikely(!p))
5495                 goto out_overflow;
5496         len = be32_to_cpup(p);
5497         if (len) {
5498                 uint32_t i;
5499
5500                 p = xdr_inline_decode(xdr, 4 * len);
5501                 if (unlikely(!p))
5502                         goto out_overflow;
5503                 for (i = 0; i < len; i++, p++) {
5504                         if (be32_to_cpup(p)) {
5505                                 dprintk("%s: notifications not supported\n",
5506                                         __func__);
5507                                 return -EIO;
5508                         }
5509                 }
5510         }
5511         return 0;
5512 out_overflow:
5513         print_overflow_msg(__func__, xdr);
5514         return -EIO;
5515 }
5516
5517 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5518                             struct nfs4_layoutget_res *res)
5519 {
5520         __be32 *p;
5521         int status;
5522         u32 layout_count;
5523         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5524         struct kvec *iov = rcvbuf->head;
5525         u32 hdrlen, recvd;
5526
5527         status = decode_op_hdr(xdr, OP_LAYOUTGET);
5528         if (status)
5529                 return status;
5530         p = xdr_inline_decode(xdr, 8 + NFS4_STATEID_SIZE);
5531         if (unlikely(!p))
5532                 goto out_overflow;
5533         res->return_on_close = be32_to_cpup(p++);
5534         p = xdr_decode_opaque_fixed(p, res->stateid.data, NFS4_STATEID_SIZE);
5535         layout_count = be32_to_cpup(p);
5536         if (!layout_count) {
5537                 dprintk("%s: server responded with empty layout array\n",
5538                         __func__);
5539                 return -EINVAL;
5540         }
5541
5542         p = xdr_inline_decode(xdr, 28);
5543         if (unlikely(!p))
5544                 goto out_overflow;
5545         p = xdr_decode_hyper(p, &res->range.offset);
5546         p = xdr_decode_hyper(p, &res->range.length);
5547         res->range.iomode = be32_to_cpup(p++);
5548         res->type = be32_to_cpup(p++);
5549         res->layoutp->len = be32_to_cpup(p);
5550
5551         dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5552                 __func__,
5553                 (unsigned long)res->range.offset,
5554                 (unsigned long)res->range.length,
5555                 res->range.iomode,
5556                 res->type,
5557                 res->layoutp->len);
5558
5559         hdrlen = (u8 *) xdr->p - (u8 *) iov->iov_base;
5560         recvd = req->rq_rcv_buf.len - hdrlen;
5561         if (res->layoutp->len > recvd) {
5562                 dprintk("NFS: server cheating in layoutget reply: "
5563                                 "layout len %u > recvd %u\n",
5564                                 res->layoutp->len, recvd);
5565                 return -EINVAL;
5566         }
5567
5568         xdr_read_pages(xdr, res->layoutp->len);
5569
5570         if (layout_count > 1) {
5571                 /* We only handle a length one array at the moment.  Any
5572                  * further entries are just ignored.  Note that this means
5573                  * the client may see a response that is less than the
5574                  * minimum it requested.
5575                  */
5576                 dprintk("%s: server responded with %d layouts, dropping tail\n",
5577                         __func__, layout_count);
5578         }
5579
5580         return 0;
5581 out_overflow:
5582         print_overflow_msg(__func__, xdr);
5583         return -EIO;
5584 }
5585
5586 static int decode_layoutreturn(struct xdr_stream *xdr,
5587                                struct nfs4_layoutreturn_res *res)
5588 {
5589         __be32 *p;
5590         int status;
5591
5592         status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5593         if (status)
5594                 return status;
5595         p = xdr_inline_decode(xdr, 4);
5596         if (unlikely(!p))
5597                 goto out_overflow;
5598         res->lrs_present = be32_to_cpup(p);
5599         if (res->lrs_present)
5600                 status = decode_stateid(xdr, &res->stateid);
5601         return status;
5602 out_overflow:
5603         print_overflow_msg(__func__, xdr);
5604         return -EIO;
5605 }
5606
5607 static int decode_layoutcommit(struct xdr_stream *xdr,
5608                                struct rpc_rqst *req,
5609                                struct nfs4_layoutcommit_res *res)
5610 {
5611         __be32 *p;
5612         __u32 sizechanged;
5613         int status;
5614
5615         status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5616         res->status = status;
5617         if (status)
5618                 return status;
5619
5620         p = xdr_inline_decode(xdr, 4);
5621         if (unlikely(!p))
5622                 goto out_overflow;
5623         sizechanged = be32_to_cpup(p);
5624
5625         if (sizechanged) {
5626                 /* throw away new size */
5627                 p = xdr_inline_decode(xdr, 8);
5628                 if (unlikely(!p))
5629                         goto out_overflow;
5630         }
5631         return 0;
5632 out_overflow:
5633         print_overflow_msg(__func__, xdr);
5634         return -EIO;
5635 }
5636
5637 static int decode_test_stateid(struct xdr_stream *xdr,
5638                                struct nfs41_test_stateid_res *res)
5639 {
5640         __be32 *p;
5641         int status;
5642         int num_res;
5643
5644         status = decode_op_hdr(xdr, OP_TEST_STATEID);
5645         if (status)
5646                 return status;
5647
5648         p = xdr_inline_decode(xdr, 4);
5649         if (unlikely(!p))
5650                 goto out_overflow;
5651         num_res = be32_to_cpup(p++);
5652         if (num_res != 1)
5653                 goto out;
5654
5655         p = xdr_inline_decode(xdr, 4);
5656         if (unlikely(!p))
5657                 goto out_overflow;
5658         res->status = be32_to_cpup(p++);
5659         return res->status;
5660 out_overflow:
5661         print_overflow_msg(__func__, xdr);
5662 out:
5663         return -EIO;
5664 }
5665
5666 static int decode_free_stateid(struct xdr_stream *xdr,
5667                                struct nfs41_free_stateid_res *res)
5668 {
5669         __be32 *p;
5670         int status;
5671
5672         status = decode_op_hdr(xdr, OP_FREE_STATEID);
5673         if (status)
5674                 return status;
5675
5676         p = xdr_inline_decode(xdr, 4);
5677         if (unlikely(!p))
5678                 goto out_overflow;
5679         res->status = be32_to_cpup(p++);
5680         return res->status;
5681 out_overflow:
5682         print_overflow_msg(__func__, xdr);
5683         return -EIO;
5684 }
5685 #endif /* CONFIG_NFS_V4_1 */
5686
5687 /*
5688  * END OF "GENERIC" DECODE ROUTINES.
5689  */
5690
5691 /*
5692  * Decode OPEN_DOWNGRADE response
5693  */
5694 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
5695                                        struct xdr_stream *xdr,
5696                                        struct nfs_closeres *res)
5697 {
5698         struct compound_hdr hdr;
5699         int status;
5700
5701         status = decode_compound_hdr(xdr, &hdr);
5702         if (status)
5703                 goto out;
5704         status = decode_sequence(xdr, &res->seq_res, rqstp);
5705         if (status)
5706                 goto out;
5707         status = decode_putfh(xdr);
5708         if (status)
5709                 goto out;
5710         status = decode_open_downgrade(xdr, res);
5711         if (status != 0)
5712                 goto out;
5713         decode_getfattr(xdr, res->fattr, res->server,
5714                         !RPC_IS_ASYNC(rqstp->rq_task));
5715 out:
5716         return status;
5717 }
5718
5719 /*
5720  * Decode ACCESS response
5721  */
5722 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5723                                struct nfs4_accessres *res)
5724 {
5725         struct compound_hdr hdr;
5726         int status;
5727
5728         status = decode_compound_hdr(xdr, &hdr);
5729         if (status)
5730                 goto out;
5731         status = decode_sequence(xdr, &res->seq_res, rqstp);
5732         if (status)
5733                 goto out;
5734         status = decode_putfh(xdr);
5735         if (status != 0)
5736                 goto out;
5737         status = decode_access(xdr, res);
5738         if (status != 0)
5739                 goto out;
5740         decode_getfattr(xdr, res->fattr, res->server,
5741                         !RPC_IS_ASYNC(rqstp->rq_task));
5742 out:
5743         return status;
5744 }
5745
5746 /*
5747  * Decode LOOKUP response
5748  */
5749 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5750                                struct nfs4_lookup_res *res)
5751 {
5752         struct compound_hdr hdr;
5753         int status;
5754
5755         status = decode_compound_hdr(xdr, &hdr);
5756         if (status)
5757                 goto out;
5758         status = decode_sequence(xdr, &res->seq_res, rqstp);
5759         if (status)
5760                 goto out;
5761         status = decode_putfh(xdr);
5762         if (status)
5763                 goto out;
5764         status = decode_lookup(xdr);
5765         if (status)
5766                 goto out;
5767         status = decode_getfh(xdr, res->fh);
5768         if (status)
5769                 goto out;
5770         status = decode_getfattr(xdr, res->fattr, res->server
5771                         ,!RPC_IS_ASYNC(rqstp->rq_task));
5772 out:
5773         return status;
5774 }
5775
5776 /*
5777  * Decode LOOKUP_ROOT response
5778  */
5779 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
5780                                     struct xdr_stream *xdr,
5781                                     struct nfs4_lookup_res *res)
5782 {
5783         struct compound_hdr hdr;
5784         int status;
5785
5786         status = decode_compound_hdr(xdr, &hdr);
5787         if (status)
5788                 goto out;
5789         status = decode_sequence(xdr, &res->seq_res, rqstp);
5790         if (status)
5791                 goto out;
5792         status = decode_putrootfh(xdr);
5793         if (status)
5794                 goto out;
5795         status = decode_getfh(xdr, res->fh);
5796         if (status == 0)
5797                 status = decode_getfattr(xdr, res->fattr, res->server,
5798                                 !RPC_IS_ASYNC(rqstp->rq_task));
5799 out:
5800         return status;
5801 }
5802
5803 /*
5804  * Decode REMOVE response
5805  */
5806 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5807                                struct nfs_removeres *res)
5808 {
5809         struct compound_hdr hdr;
5810         int status;
5811
5812         status = decode_compound_hdr(xdr, &hdr);
5813         if (status)
5814                 goto out;
5815         status = decode_sequence(xdr, &res->seq_res, rqstp);
5816         if (status)
5817                 goto out;
5818         status = decode_putfh(xdr);
5819         if (status)
5820                 goto out;
5821         status = decode_remove(xdr, &res->cinfo);
5822         if (status)
5823                 goto out;
5824         decode_getfattr(xdr, res->dir_attr, res->server,
5825                         !RPC_IS_ASYNC(rqstp->rq_task));
5826 out:
5827         return status;
5828 }
5829
5830 /*
5831  * Decode RENAME response
5832  */
5833 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5834                                struct nfs_renameres *res)
5835 {
5836         struct compound_hdr hdr;
5837         int status;
5838
5839         status = decode_compound_hdr(xdr, &hdr);
5840         if (status)
5841                 goto out;
5842         status = decode_sequence(xdr, &res->seq_res, rqstp);
5843         if (status)
5844                 goto out;
5845         status = decode_putfh(xdr);
5846         if (status)
5847                 goto out;
5848         status = decode_savefh(xdr);
5849         if (status)
5850                 goto out;
5851         status = decode_putfh(xdr);
5852         if (status)
5853                 goto out;
5854         status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
5855         if (status)
5856                 goto out;
5857         /* Current FH is target directory */
5858         if (decode_getfattr(xdr, res->new_fattr, res->server,
5859                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5860                 goto out;
5861         status = decode_restorefh(xdr);
5862         if (status)
5863                 goto out;
5864         decode_getfattr(xdr, res->old_fattr, res->server,
5865                         !RPC_IS_ASYNC(rqstp->rq_task));
5866 out:
5867         return status;
5868 }
5869
5870 /*
5871  * Decode LINK response
5872  */
5873 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5874                              struct nfs4_link_res *res)
5875 {
5876         struct compound_hdr hdr;
5877         int status;
5878
5879         status = decode_compound_hdr(xdr, &hdr);
5880         if (status)
5881                 goto out;
5882         status = decode_sequence(xdr, &res->seq_res, rqstp);
5883         if (status)
5884                 goto out;
5885         status = decode_putfh(xdr);
5886         if (status)
5887                 goto out;
5888         status = decode_savefh(xdr);
5889         if (status)
5890                 goto out;
5891         status = decode_putfh(xdr);
5892         if (status)
5893                 goto out;
5894         status = decode_link(xdr, &res->cinfo);
5895         if (status)
5896                 goto out;
5897         /*
5898          * Note order: OP_LINK leaves the directory as the current
5899          *             filehandle.
5900          */
5901         if (decode_getfattr(xdr, res->dir_attr, res->server,
5902                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5903                 goto out;
5904         status = decode_restorefh(xdr);
5905         if (status)
5906                 goto out;
5907         decode_getfattr(xdr, res->fattr, res->server,
5908                         !RPC_IS_ASYNC(rqstp->rq_task));
5909 out:
5910         return status;
5911 }
5912
5913 /*
5914  * Decode CREATE response
5915  */
5916 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5917                                struct nfs4_create_res *res)
5918 {
5919         struct compound_hdr hdr;
5920         int status;
5921
5922         status = decode_compound_hdr(xdr, &hdr);
5923         if (status)
5924                 goto out;
5925         status = decode_sequence(xdr, &res->seq_res, rqstp);
5926         if (status)
5927                 goto out;
5928         status = decode_putfh(xdr);
5929         if (status)
5930                 goto out;
5931         status = decode_savefh(xdr);
5932         if (status)
5933                 goto out;
5934         status = decode_create(xdr, &res->dir_cinfo);
5935         if (status)
5936                 goto out;
5937         status = decode_getfh(xdr, res->fh);
5938         if (status)
5939                 goto out;
5940         if (decode_getfattr(xdr, res->fattr, res->server,
5941                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5942                 goto out;
5943         status = decode_restorefh(xdr);
5944         if (status)
5945                 goto out;
5946         decode_getfattr(xdr, res->dir_fattr, res->server,
5947                         !RPC_IS_ASYNC(rqstp->rq_task));
5948 out:
5949         return status;
5950 }
5951
5952 /*
5953  * Decode SYMLINK response
5954  */
5955 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5956                                 struct nfs4_create_res *res)
5957 {
5958         return nfs4_xdr_dec_create(rqstp, xdr, res);
5959 }
5960
5961 /*
5962  * Decode GETATTR response
5963  */
5964 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5965                                 struct nfs4_getattr_res *res)
5966 {
5967         struct compound_hdr hdr;
5968         int status;
5969
5970         status = decode_compound_hdr(xdr, &hdr);
5971         if (status)
5972                 goto out;
5973         status = decode_sequence(xdr, &res->seq_res, rqstp);
5974         if (status)
5975                 goto out;
5976         status = decode_putfh(xdr);
5977         if (status)
5978                 goto out;
5979         status = decode_getfattr(xdr, res->fattr, res->server,
5980                         !RPC_IS_ASYNC(rqstp->rq_task));
5981 out:
5982         return status;
5983 }
5984
5985 /*
5986  * Encode an SETACL request
5987  */
5988 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
5989                                 struct nfs_setaclargs *args)
5990 {
5991         struct compound_hdr hdr = {
5992                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
5993         };
5994
5995         encode_compound_hdr(xdr, req, &hdr);
5996         encode_sequence(xdr, &args->seq_args, &hdr);
5997         encode_putfh(xdr, args->fh, &hdr);
5998         encode_setacl(xdr, args, &hdr);
5999         encode_nops(&hdr);
6000 }
6001
6002 /*
6003  * Decode SETACL response
6004  */
6005 static int
6006 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6007                     struct nfs_setaclres *res)
6008 {
6009         struct compound_hdr hdr;
6010         int status;
6011
6012         status = decode_compound_hdr(xdr, &hdr);
6013         if (status)
6014                 goto out;
6015         status = decode_sequence(xdr, &res->seq_res, rqstp);
6016         if (status)
6017                 goto out;
6018         status = decode_putfh(xdr);
6019         if (status)
6020                 goto out;
6021         status = decode_setattr(xdr);
6022 out:
6023         return status;
6024 }
6025
6026 /*
6027  * Decode GETACL response
6028  */
6029 static int
6030 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6031                     struct nfs_getaclres *res)
6032 {
6033         struct compound_hdr hdr;
6034         int status;
6035
6036         if (res->acl_scratch != NULL) {
6037                 void *p = page_address(res->acl_scratch);
6038                 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6039         }
6040         status = decode_compound_hdr(xdr, &hdr);
6041         if (status)
6042                 goto out;
6043         status = decode_sequence(xdr, &res->seq_res, rqstp);
6044         if (status)
6045                 goto out;
6046         status = decode_putfh(xdr);
6047         if (status)
6048                 goto out;
6049         status = decode_getacl(xdr, rqstp, res);
6050
6051 out:
6052         return status;
6053 }
6054
6055 /*
6056  * Decode CLOSE response
6057  */
6058 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6059                               struct nfs_closeres *res)
6060 {
6061         struct compound_hdr hdr;
6062         int status;
6063
6064         status = decode_compound_hdr(xdr, &hdr);
6065         if (status)
6066                 goto out;
6067         status = decode_sequence(xdr, &res->seq_res, rqstp);
6068         if (status)
6069                 goto out;
6070         status = decode_putfh(xdr);
6071         if (status)
6072                 goto out;
6073         status = decode_close(xdr, res);
6074         if (status != 0)
6075                 goto out;
6076         /*
6077          * Note: Server may do delete on close for this file
6078          *      in which case the getattr call will fail with
6079          *      an ESTALE error. Shouldn't be a problem,
6080          *      though, since fattr->valid will remain unset.
6081          */
6082         decode_getfattr(xdr, res->fattr, res->server,
6083                         !RPC_IS_ASYNC(rqstp->rq_task));
6084 out:
6085         return status;
6086 }
6087
6088 /*
6089  * Decode OPEN response
6090  */
6091 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6092                              struct nfs_openres *res)
6093 {
6094         struct compound_hdr hdr;
6095         int status;
6096
6097         status = decode_compound_hdr(xdr, &hdr);
6098         if (status)
6099                 goto out;
6100         status = decode_sequence(xdr, &res->seq_res, rqstp);
6101         if (status)
6102                 goto out;
6103         status = decode_putfh(xdr);
6104         if (status)
6105                 goto out;
6106         status = decode_savefh(xdr);
6107         if (status)
6108                 goto out;
6109         status = decode_open(xdr, res);
6110         if (status)
6111                 goto out;
6112         if (decode_getfh(xdr, &res->fh) != 0)
6113                 goto out;
6114         if (decode_getfattr(xdr, res->f_attr, res->server,
6115                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
6116                 goto out;
6117         if (decode_restorefh(xdr) != 0)
6118                 goto out;
6119         decode_getfattr(xdr, res->dir_attr, res->server,
6120                         !RPC_IS_ASYNC(rqstp->rq_task));
6121 out:
6122         return status;
6123 }
6124
6125 /*
6126  * Decode OPEN_CONFIRM response
6127  */
6128 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6129                                      struct xdr_stream *xdr,
6130                                      struct nfs_open_confirmres *res)
6131 {
6132         struct compound_hdr hdr;
6133         int status;
6134
6135         status = decode_compound_hdr(xdr, &hdr);
6136         if (status)
6137                 goto out;
6138         status = decode_putfh(xdr);
6139         if (status)
6140                 goto out;
6141         status = decode_open_confirm(xdr, res);
6142 out:
6143         return status;
6144 }
6145
6146 /*
6147  * Decode OPEN response
6148  */
6149 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6150                                     struct xdr_stream *xdr,
6151                                     struct nfs_openres *res)
6152 {
6153         struct compound_hdr hdr;
6154         int status;
6155
6156         status = decode_compound_hdr(xdr, &hdr);
6157         if (status)
6158                 goto out;
6159         status = decode_sequence(xdr, &res->seq_res, rqstp);
6160         if (status)
6161                 goto out;
6162         status = decode_putfh(xdr);
6163         if (status)
6164                 goto out;
6165         status = decode_open(xdr, res);
6166         if (status)
6167                 goto out;
6168         decode_getfattr(xdr, res->f_attr, res->server,
6169                         !RPC_IS_ASYNC(rqstp->rq_task));
6170 out:
6171         return status;
6172 }
6173
6174 /*
6175  * Decode SETATTR response
6176  */
6177 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6178                                 struct xdr_stream *xdr,
6179                                 struct nfs_setattrres *res)
6180 {
6181         struct compound_hdr hdr;
6182         int status;
6183
6184         status = decode_compound_hdr(xdr, &hdr);
6185         if (status)
6186                 goto out;
6187         status = decode_sequence(xdr, &res->seq_res, rqstp);
6188         if (status)
6189                 goto out;
6190         status = decode_putfh(xdr);
6191         if (status)
6192                 goto out;
6193         status = decode_setattr(xdr);
6194         if (status)
6195                 goto out;
6196         decode_getfattr(xdr, res->fattr, res->server,
6197                         !RPC_IS_ASYNC(rqstp->rq_task));
6198 out:
6199         return status;
6200 }
6201
6202 /*
6203  * Decode LOCK response
6204  */
6205 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6206                              struct nfs_lock_res *res)
6207 {
6208         struct compound_hdr hdr;
6209         int status;
6210
6211         status = decode_compound_hdr(xdr, &hdr);
6212         if (status)
6213                 goto out;
6214         status = decode_sequence(xdr, &res->seq_res, rqstp);
6215         if (status)
6216                 goto out;
6217         status = decode_putfh(xdr);
6218         if (status)
6219                 goto out;
6220         status = decode_lock(xdr, res);
6221 out:
6222         return status;
6223 }
6224
6225 /*
6226  * Decode LOCKT response
6227  */
6228 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6229                               struct nfs_lockt_res *res)
6230 {
6231         struct compound_hdr hdr;
6232         int status;
6233
6234         status = decode_compound_hdr(xdr, &hdr);
6235         if (status)
6236                 goto out;
6237         status = decode_sequence(xdr, &res->seq_res, rqstp);
6238         if (status)
6239                 goto out;
6240         status = decode_putfh(xdr);
6241         if (status)
6242                 goto out;
6243         status = decode_lockt(xdr, res);
6244 out:
6245         return status;
6246 }
6247
6248 /*
6249  * Decode LOCKU response
6250  */
6251 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6252                               struct nfs_locku_res *res)
6253 {
6254         struct compound_hdr hdr;
6255         int status;
6256
6257         status = decode_compound_hdr(xdr, &hdr);
6258         if (status)
6259                 goto out;
6260         status = decode_sequence(xdr, &res->seq_res, rqstp);
6261         if (status)
6262                 goto out;
6263         status = decode_putfh(xdr);
6264         if (status)
6265                 goto out;
6266         status = decode_locku(xdr, res);
6267 out:
6268         return status;
6269 }
6270
6271 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6272                                           struct xdr_stream *xdr, void *dummy)
6273 {
6274         struct compound_hdr hdr;
6275         int status;
6276
6277         status = decode_compound_hdr(xdr, &hdr);
6278         if (!status)
6279                 status = decode_release_lockowner(xdr);
6280         return status;
6281 }
6282
6283 /*
6284  * Decode READLINK response
6285  */
6286 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6287                                  struct xdr_stream *xdr,
6288                                  struct nfs4_readlink_res *res)
6289 {
6290         struct compound_hdr hdr;
6291         int status;
6292
6293         status = decode_compound_hdr(xdr, &hdr);
6294         if (status)
6295                 goto out;
6296         status = decode_sequence(xdr, &res->seq_res, rqstp);
6297         if (status)
6298                 goto out;
6299         status = decode_putfh(xdr);
6300         if (status)
6301                 goto out;
6302         status = decode_readlink(xdr, rqstp);
6303 out:
6304         return status;
6305 }
6306
6307 /*
6308  * Decode READDIR response
6309  */
6310 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6311                                 struct nfs4_readdir_res *res)
6312 {
6313         struct compound_hdr hdr;
6314         int status;
6315
6316         status = decode_compound_hdr(xdr, &hdr);
6317         if (status)
6318                 goto out;
6319         status = decode_sequence(xdr, &res->seq_res, rqstp);
6320         if (status)
6321                 goto out;
6322         status = decode_putfh(xdr);
6323         if (status)
6324                 goto out;
6325         status = decode_readdir(xdr, rqstp, res);
6326 out:
6327         return status;
6328 }
6329
6330 /*
6331  * Decode Read response
6332  */
6333 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6334                              struct nfs_readres *res)
6335 {
6336         struct compound_hdr hdr;
6337         int status;
6338
6339         status = decode_compound_hdr(xdr, &hdr);
6340         if (status)
6341                 goto out;
6342         status = decode_sequence(xdr, &res->seq_res, rqstp);
6343         if (status)
6344                 goto out;
6345         status = decode_putfh(xdr);
6346         if (status)
6347                 goto out;
6348         status = decode_read(xdr, rqstp, res);
6349         if (!status)
6350                 status = res->count;
6351 out:
6352         return status;
6353 }
6354
6355 /*
6356  * Decode WRITE response
6357  */
6358 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6359                               struct nfs_writeres *res)
6360 {
6361         struct compound_hdr hdr;
6362         int status;
6363
6364         status = decode_compound_hdr(xdr, &hdr);
6365         if (status)
6366                 goto out;
6367         status = decode_sequence(xdr, &res->seq_res, rqstp);
6368         if (status)
6369                 goto out;
6370         status = decode_putfh(xdr);
6371         if (status)
6372                 goto out;
6373         status = decode_write(xdr, res);
6374         if (status)
6375                 goto out;
6376         if (res->fattr)
6377                 decode_getfattr(xdr, res->fattr, res->server,
6378                                 !RPC_IS_ASYNC(rqstp->rq_task));
6379         if (!status)
6380                 status = res->count;
6381 out:
6382         return status;
6383 }
6384
6385 /*
6386  * Decode COMMIT response
6387  */
6388 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6389                                struct nfs_writeres *res)
6390 {
6391         struct compound_hdr hdr;
6392         int status;
6393
6394         status = decode_compound_hdr(xdr, &hdr);
6395         if (status)
6396                 goto out;
6397         status = decode_sequence(xdr, &res->seq_res, rqstp);
6398         if (status)
6399                 goto out;
6400         status = decode_putfh(xdr);
6401         if (status)
6402                 goto out;
6403         status = decode_commit(xdr, res);
6404         if (status)
6405                 goto out;
6406         if (res->fattr)
6407                 decode_getfattr(xdr, res->fattr, res->server,
6408                                 !RPC_IS_ASYNC(rqstp->rq_task));
6409 out:
6410         return status;
6411 }
6412
6413 /*
6414  * Decode FSINFO response
6415  */
6416 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6417                                struct nfs4_fsinfo_res *res)
6418 {
6419         struct compound_hdr hdr;
6420         int status;
6421
6422         status = decode_compound_hdr(xdr, &hdr);
6423         if (!status)
6424                 status = decode_sequence(xdr, &res->seq_res, req);
6425         if (!status)
6426                 status = decode_putfh(xdr);
6427         if (!status)
6428                 status = decode_fsinfo(xdr, res->fsinfo);
6429         return status;
6430 }
6431
6432 /*
6433  * Decode PATHCONF response
6434  */
6435 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6436                                  struct nfs4_pathconf_res *res)
6437 {
6438         struct compound_hdr hdr;
6439         int status;
6440
6441         status = decode_compound_hdr(xdr, &hdr);
6442         if (!status)
6443                 status = decode_sequence(xdr, &res->seq_res, req);
6444         if (!status)
6445                 status = decode_putfh(xdr);
6446         if (!status)
6447                 status = decode_pathconf(xdr, res->pathconf);
6448         return status;
6449 }
6450
6451 /*
6452  * Decode STATFS response
6453  */
6454 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6455                                struct nfs4_statfs_res *res)
6456 {
6457         struct compound_hdr hdr;
6458         int status;
6459
6460         status = decode_compound_hdr(xdr, &hdr);
6461         if (!status)
6462                 status = decode_sequence(xdr, &res->seq_res, req);
6463         if (!status)
6464                 status = decode_putfh(xdr);
6465         if (!status)
6466                 status = decode_statfs(xdr, res->fsstat);
6467         return status;
6468 }
6469
6470 /*
6471  * Decode GETATTR_BITMAP response
6472  */
6473 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6474                                     struct xdr_stream *xdr,
6475                                     struct nfs4_server_caps_res *res)
6476 {
6477         struct compound_hdr hdr;
6478         int status;
6479
6480         status = decode_compound_hdr(xdr, &hdr);
6481         if (status)
6482                 goto out;
6483         status = decode_sequence(xdr, &res->seq_res, req);
6484         if (status)
6485                 goto out;
6486         status = decode_putfh(xdr);
6487         if (status)
6488                 goto out;
6489         status = decode_server_caps(xdr, res);
6490 out:
6491         return status;
6492 }
6493
6494 /*
6495  * Decode RENEW response
6496  */
6497 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6498                               void *__unused)
6499 {
6500         struct compound_hdr hdr;
6501         int status;
6502
6503         status = decode_compound_hdr(xdr, &hdr);
6504         if (!status)
6505                 status = decode_renew(xdr);
6506         return status;
6507 }
6508
6509 /*
6510  * Decode SETCLIENTID response
6511  */
6512 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6513                                     struct xdr_stream *xdr,
6514                                     struct nfs4_setclientid_res *res)
6515 {
6516         struct compound_hdr hdr;
6517         int status;
6518
6519         status = decode_compound_hdr(xdr, &hdr);
6520         if (!status)
6521                 status = decode_setclientid(xdr, res);
6522         return status;
6523 }
6524
6525 /*
6526  * Decode SETCLIENTID_CONFIRM response
6527  */
6528 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6529                                             struct xdr_stream *xdr,
6530                                             struct nfs_fsinfo *fsinfo)
6531 {
6532         struct compound_hdr hdr;
6533         int status;
6534
6535         status = decode_compound_hdr(xdr, &hdr);
6536         if (!status)
6537                 status = decode_setclientid_confirm(xdr);
6538         if (!status)
6539                 status = decode_putrootfh(xdr);
6540         if (!status)
6541                 status = decode_fsinfo(xdr, fsinfo);
6542         return status;
6543 }
6544
6545 /*
6546  * Decode DELEGRETURN response
6547  */
6548 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6549                                     struct xdr_stream *xdr,
6550                                     struct nfs4_delegreturnres *res)
6551 {
6552         struct compound_hdr hdr;
6553         int status;
6554
6555         status = decode_compound_hdr(xdr, &hdr);
6556         if (status)
6557                 goto out;
6558         status = decode_sequence(xdr, &res->seq_res, rqstp);
6559         if (status)
6560                 goto out;
6561         status = decode_putfh(xdr);
6562         if (status != 0)
6563                 goto out;
6564         status = decode_delegreturn(xdr);
6565         if (status != 0)
6566                 goto out;
6567         decode_getfattr(xdr, res->fattr, res->server,
6568                         !RPC_IS_ASYNC(rqstp->rq_task));
6569 out:
6570         return status;
6571 }
6572
6573 /*
6574  * Decode FS_LOCATIONS response
6575  */
6576 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6577                                      struct xdr_stream *xdr,
6578                                      struct nfs4_fs_locations_res *res)
6579 {
6580         struct compound_hdr hdr;
6581         int status;
6582
6583         status = decode_compound_hdr(xdr, &hdr);
6584         if (status)
6585                 goto out;
6586         status = decode_sequence(xdr, &res->seq_res, req);
6587         if (status)
6588                 goto out;
6589         status = decode_putfh(xdr);
6590         if (status)
6591                 goto out;
6592         status = decode_lookup(xdr);
6593         if (status)
6594                 goto out;
6595         xdr_enter_page(xdr, PAGE_SIZE);
6596         status = decode_getfattr(xdr, &res->fs_locations->fattr,
6597                                  res->fs_locations->server,
6598                                  !RPC_IS_ASYNC(req->rq_task));
6599 out:
6600         return status;
6601 }
6602
6603 /*
6604  * Decode SECINFO response
6605  */
6606 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6607                                 struct xdr_stream *xdr,
6608                                 struct nfs4_secinfo_res *res)
6609 {
6610         struct compound_hdr hdr;
6611         int status;
6612
6613         status = decode_compound_hdr(xdr, &hdr);
6614         if (status)
6615                 goto out;
6616         status = decode_sequence(xdr, &res->seq_res, rqstp);
6617         if (status)
6618                 goto out;
6619         status = decode_putfh(xdr);
6620         if (status)
6621                 goto out;
6622         status = decode_secinfo(xdr, res);
6623 out:
6624         return status;
6625 }
6626
6627 #if defined(CONFIG_NFS_V4_1)
6628 /*
6629  * Decode EXCHANGE_ID response
6630  */
6631 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
6632                                     struct xdr_stream *xdr,
6633                                     void *res)
6634 {
6635         struct compound_hdr hdr;
6636         int status;
6637
6638         status = decode_compound_hdr(xdr, &hdr);
6639         if (!status)
6640                 status = decode_exchange_id(xdr, res);
6641         return status;
6642 }
6643
6644 /*
6645  * Decode CREATE_SESSION response
6646  */
6647 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
6648                                        struct xdr_stream *xdr,
6649                                        struct nfs41_create_session_res *res)
6650 {
6651         struct compound_hdr hdr;
6652         int status;
6653
6654         status = decode_compound_hdr(xdr, &hdr);
6655         if (!status)
6656                 status = decode_create_session(xdr, res);
6657         return status;
6658 }
6659
6660 /*
6661  * Decode DESTROY_SESSION response
6662  */
6663 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
6664                                         struct xdr_stream *xdr,
6665                                         void *res)
6666 {
6667         struct compound_hdr hdr;
6668         int status;
6669
6670         status = decode_compound_hdr(xdr, &hdr);
6671         if (!status)
6672                 status = decode_destroy_session(xdr, res);
6673         return status;
6674 }
6675
6676 /*
6677  * Decode SEQUENCE response
6678  */
6679 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
6680                                  struct xdr_stream *xdr,
6681                                  struct nfs4_sequence_res *res)
6682 {
6683         struct compound_hdr hdr;
6684         int status;
6685
6686         status = decode_compound_hdr(xdr, &hdr);
6687         if (!status)
6688                 status = decode_sequence(xdr, res, rqstp);
6689         return status;
6690 }
6691
6692 /*
6693  * Decode GET_LEASE_TIME response
6694  */
6695 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
6696                                        struct xdr_stream *xdr,
6697                                        struct nfs4_get_lease_time_res *res)
6698 {
6699         struct compound_hdr hdr;
6700         int status;
6701
6702         status = decode_compound_hdr(xdr, &hdr);
6703         if (!status)
6704                 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
6705         if (!status)
6706                 status = decode_putrootfh(xdr);
6707         if (!status)
6708                 status = decode_fsinfo(xdr, res->lr_fsinfo);
6709         return status;
6710 }
6711
6712 /*
6713  * Decode RECLAIM_COMPLETE response
6714  */
6715 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
6716                                          struct xdr_stream *xdr,
6717                                          struct nfs41_reclaim_complete_res *res)
6718 {
6719         struct compound_hdr hdr;
6720         int status;
6721
6722         status = decode_compound_hdr(xdr, &hdr);
6723         if (!status)
6724                 status = decode_sequence(xdr, &res->seq_res, rqstp);
6725         if (!status)
6726                 status = decode_reclaim_complete(xdr, (void *)NULL);
6727         return status;
6728 }
6729
6730 /*
6731  * Decode GETDEVICELIST response
6732  */
6733 static int nfs4_xdr_dec_getdevicelist(struct rpc_rqst *rqstp,
6734                                       struct xdr_stream *xdr,
6735                                       struct nfs4_getdevicelist_res *res)
6736 {
6737         struct compound_hdr hdr;
6738         int status;
6739
6740         dprintk("encoding getdevicelist!\n");
6741
6742         status = decode_compound_hdr(xdr, &hdr);
6743         if (status != 0)
6744                 goto out;
6745         status = decode_sequence(xdr, &res->seq_res, rqstp);
6746         if (status != 0)
6747                 goto out;
6748         status = decode_putfh(xdr);
6749         if (status != 0)
6750                 goto out;
6751         status = decode_getdevicelist(xdr, res->devlist);
6752 out:
6753         return status;
6754 }
6755
6756 /*
6757  * Decode GETDEVINFO response
6758  */
6759 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
6760                                       struct xdr_stream *xdr,
6761                                       struct nfs4_getdeviceinfo_res *res)
6762 {
6763         struct compound_hdr hdr;
6764         int status;
6765
6766         status = decode_compound_hdr(xdr, &hdr);
6767         if (status != 0)
6768                 goto out;
6769         status = decode_sequence(xdr, &res->seq_res, rqstp);
6770         if (status != 0)
6771                 goto out;
6772         status = decode_getdeviceinfo(xdr, res->pdev);
6773 out:
6774         return status;
6775 }
6776
6777 /*
6778  * Decode LAYOUTGET response
6779  */
6780 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
6781                                   struct xdr_stream *xdr,
6782                                   struct nfs4_layoutget_res *res)
6783 {
6784         struct compound_hdr hdr;
6785         int status;
6786
6787         status = decode_compound_hdr(xdr, &hdr);
6788         if (status)
6789                 goto out;
6790         status = decode_sequence(xdr, &res->seq_res, rqstp);
6791         if (status)
6792                 goto out;
6793         status = decode_putfh(xdr);
6794         if (status)
6795                 goto out;
6796         status = decode_layoutget(xdr, rqstp, res);
6797 out:
6798         return status;
6799 }
6800
6801 /*
6802  * Decode LAYOUTRETURN response
6803  */
6804 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
6805                                      struct xdr_stream *xdr,
6806                                      struct nfs4_layoutreturn_res *res)
6807 {
6808         struct compound_hdr hdr;
6809         int status;
6810
6811         status = decode_compound_hdr(xdr, &hdr);
6812         if (status)
6813                 goto out;
6814         status = decode_sequence(xdr, &res->seq_res, rqstp);
6815         if (status)
6816                 goto out;
6817         status = decode_putfh(xdr);
6818         if (status)
6819                 goto out;
6820         status = decode_layoutreturn(xdr, res);
6821 out:
6822         return status;
6823 }
6824
6825 /*
6826  * Decode LAYOUTCOMMIT response
6827  */
6828 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
6829                                      struct xdr_stream *xdr,
6830                                      struct nfs4_layoutcommit_res *res)
6831 {
6832         struct compound_hdr hdr;
6833         int status;
6834
6835         status = decode_compound_hdr(xdr, &hdr);
6836         if (status)
6837                 goto out;
6838         status = decode_sequence(xdr, &res->seq_res, rqstp);
6839         if (status)
6840                 goto out;
6841         status = decode_putfh(xdr);
6842         if (status)
6843                 goto out;
6844         status = decode_layoutcommit(xdr, rqstp, res);
6845         if (status)
6846                 goto out;
6847         decode_getfattr(xdr, res->fattr, res->server,
6848                         !RPC_IS_ASYNC(rqstp->rq_task));
6849 out:
6850         return status;
6851 }
6852
6853 /*
6854  * Decode SECINFO_NO_NAME response
6855  */
6856 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
6857                                         struct xdr_stream *xdr,
6858                                         struct nfs4_secinfo_res *res)
6859 {
6860         struct compound_hdr hdr;
6861         int status;
6862
6863         status = decode_compound_hdr(xdr, &hdr);
6864         if (status)
6865                 goto out;
6866         status = decode_sequence(xdr, &res->seq_res, rqstp);
6867         if (status)
6868                 goto out;
6869         status = decode_putrootfh(xdr);
6870         if (status)
6871                 goto out;
6872         status = decode_secinfo(xdr, res);
6873 out:
6874         return status;
6875 }
6876
6877 /*
6878  * Decode TEST_STATEID response
6879  */
6880 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
6881                                      struct xdr_stream *xdr,
6882                                      struct nfs41_test_stateid_res *res)
6883 {
6884         struct compound_hdr hdr;
6885         int status;
6886
6887         status = decode_compound_hdr(xdr, &hdr);
6888         if (status)
6889                 goto out;
6890         status = decode_sequence(xdr, &res->seq_res, rqstp);
6891         if (status)
6892                 goto out;
6893         status = decode_test_stateid(xdr, res);
6894 out:
6895         return status;
6896 }
6897
6898 /*
6899  * Decode FREE_STATEID response
6900  */
6901 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
6902                                      struct xdr_stream *xdr,
6903                                      struct nfs41_free_stateid_res *res)
6904 {
6905         struct compound_hdr hdr;
6906         int status;
6907
6908         status = decode_compound_hdr(xdr, &hdr);
6909         if (status)
6910                 goto out;
6911         status = decode_sequence(xdr, &res->seq_res, rqstp);
6912         if (status)
6913                 goto out;
6914         status = decode_free_stateid(xdr, res);
6915 out:
6916         return status;
6917 }
6918 #endif /* CONFIG_NFS_V4_1 */
6919
6920 /**
6921  * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
6922  *                      the local page cache.
6923  * @xdr: XDR stream where entry resides
6924  * @entry: buffer to fill in with entry data
6925  * @plus: boolean indicating whether this should be a readdirplus entry
6926  *
6927  * Returns zero if successful, otherwise a negative errno value is
6928  * returned.
6929  *
6930  * This function is not invoked during READDIR reply decoding, but
6931  * rather whenever an application invokes the getdents(2) system call
6932  * on a directory already in our cache.
6933  */
6934 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
6935                        int plus)
6936 {
6937         uint32_t bitmap[3] = {0};
6938         uint32_t len;
6939         __be32 *p = xdr_inline_decode(xdr, 4);
6940         if (unlikely(!p))
6941                 goto out_overflow;
6942         if (*p == xdr_zero) {
6943                 p = xdr_inline_decode(xdr, 4);
6944                 if (unlikely(!p))
6945                         goto out_overflow;
6946                 if (*p == xdr_zero)
6947                         return -EAGAIN;
6948                 entry->eof = 1;
6949                 return -EBADCOOKIE;
6950         }
6951
6952         p = xdr_inline_decode(xdr, 12);
6953         if (unlikely(!p))
6954                 goto out_overflow;
6955         entry->prev_cookie = entry->cookie;
6956         p = xdr_decode_hyper(p, &entry->cookie);
6957         entry->len = be32_to_cpup(p);
6958
6959         p = xdr_inline_decode(xdr, entry->len);
6960         if (unlikely(!p))
6961                 goto out_overflow;
6962         entry->name = (const char *) p;
6963
6964         /*
6965          * In case the server doesn't return an inode number,
6966          * we fake one here.  (We don't use inode number 0,
6967          * since glibc seems to choke on it...)
6968          */
6969         entry->ino = 1;
6970         entry->fattr->valid = 0;
6971
6972         if (decode_attr_bitmap(xdr, bitmap) < 0)
6973                 goto out_overflow;
6974
6975         if (decode_attr_length(xdr, &len, &p) < 0)
6976                 goto out_overflow;
6977
6978         if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
6979                                         entry->server, 1) < 0)
6980                 goto out_overflow;
6981         if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
6982                 entry->ino = entry->fattr->mounted_on_fileid;
6983         else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
6984                 entry->ino = entry->fattr->fileid;
6985
6986         entry->d_type = DT_UNKNOWN;
6987         if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
6988                 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
6989
6990         return 0;
6991
6992 out_overflow:
6993         print_overflow_msg(__func__, xdr);
6994         return -EAGAIN;
6995 }
6996
6997 /*
6998  * We need to translate between nfs status return values and
6999  * the local errno values which may not be the same.
7000  */
7001 static struct {
7002         int stat;
7003         int errno;
7004 } nfs_errtbl[] = {
7005         { NFS4_OK,              0               },
7006         { NFS4ERR_PERM,         -EPERM          },
7007         { NFS4ERR_NOENT,        -ENOENT         },
7008         { NFS4ERR_IO,           -errno_NFSERR_IO},
7009         { NFS4ERR_NXIO,         -ENXIO          },
7010         { NFS4ERR_ACCESS,       -EACCES         },
7011         { NFS4ERR_EXIST,        -EEXIST         },
7012         { NFS4ERR_XDEV,         -EXDEV          },
7013         { NFS4ERR_NOTDIR,       -ENOTDIR        },
7014         { NFS4ERR_ISDIR,        -EISDIR         },
7015         { NFS4ERR_INVAL,        -EINVAL         },
7016         { NFS4ERR_FBIG,         -EFBIG          },
7017         { NFS4ERR_NOSPC,        -ENOSPC         },
7018         { NFS4ERR_ROFS,         -EROFS          },
7019         { NFS4ERR_MLINK,        -EMLINK         },
7020         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
7021         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
7022         { NFS4ERR_DQUOT,        -EDQUOT         },
7023         { NFS4ERR_STALE,        -ESTALE         },
7024         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
7025         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
7026         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
7027         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
7028         { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
7029         { NFS4ERR_BADTYPE,      -EBADTYPE       },
7030         { NFS4ERR_LOCKED,       -EAGAIN         },
7031         { NFS4ERR_SYMLINK,      -ELOOP          },
7032         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
7033         { NFS4ERR_DEADLOCK,     -EDEADLK        },
7034         { -1,                   -EIO            }
7035 };
7036
7037 /*
7038  * Convert an NFS error code to a local one.
7039  * This one is used jointly by NFSv2 and NFSv3.
7040  */
7041 static int
7042 nfs4_stat_to_errno(int stat)
7043 {
7044         int i;
7045         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7046                 if (nfs_errtbl[i].stat == stat)
7047                         return nfs_errtbl[i].errno;
7048         }
7049         if (stat <= 10000 || stat > 10100) {
7050                 /* The server is looney tunes. */
7051                 return -EREMOTEIO;
7052         }
7053         /* If we cannot translate the error, the recovery routines should
7054          * handle it.
7055          * Note: remaining NFSv4 error codes have values > 10000, so should
7056          * not conflict with native Linux error codes.
7057          */
7058         return -stat;
7059 }
7060
7061 #define PROC(proc, argtype, restype)                            \
7062 [NFSPROC4_CLNT_##proc] = {                                      \
7063         .p_proc   = NFSPROC4_COMPOUND,                          \
7064         .p_encode = (kxdreproc_t)nfs4_xdr_##argtype,            \
7065         .p_decode = (kxdrdproc_t)nfs4_xdr_##restype,            \
7066         .p_arglen = NFS4_##argtype##_sz,                        \
7067         .p_replen = NFS4_##restype##_sz,                        \
7068         .p_statidx = NFSPROC4_CLNT_##proc,                      \
7069         .p_name   = #proc,                                      \
7070 }
7071
7072 struct rpc_procinfo     nfs4_procedures[] = {
7073         PROC(READ,              enc_read,               dec_read),
7074         PROC(WRITE,             enc_write,              dec_write),
7075         PROC(COMMIT,            enc_commit,             dec_commit),
7076         PROC(OPEN,              enc_open,               dec_open),
7077         PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
7078         PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
7079         PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
7080         PROC(CLOSE,             enc_close,              dec_close),
7081         PROC(SETATTR,           enc_setattr,            dec_setattr),
7082         PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
7083         PROC(RENEW,             enc_renew,              dec_renew),
7084         PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
7085         PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7086         PROC(LOCK,              enc_lock,               dec_lock),
7087         PROC(LOCKT,             enc_lockt,              dec_lockt),
7088         PROC(LOCKU,             enc_locku,              dec_locku),
7089         PROC(ACCESS,            enc_access,             dec_access),
7090         PROC(GETATTR,           enc_getattr,            dec_getattr),
7091         PROC(LOOKUP,            enc_lookup,             dec_lookup),
7092         PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
7093         PROC(REMOVE,            enc_remove,             dec_remove),
7094         PROC(RENAME,            enc_rename,             dec_rename),
7095         PROC(LINK,              enc_link,               dec_link),
7096         PROC(SYMLINK,           enc_symlink,            dec_symlink),
7097         PROC(CREATE,            enc_create,             dec_create),
7098         PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
7099         PROC(STATFS,            enc_statfs,             dec_statfs),
7100         PROC(READLINK,          enc_readlink,           dec_readlink),
7101         PROC(READDIR,           enc_readdir,            dec_readdir),
7102         PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
7103         PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
7104         PROC(GETACL,            enc_getacl,             dec_getacl),
7105         PROC(SETACL,            enc_setacl,             dec_setacl),
7106         PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
7107         PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
7108         PROC(SECINFO,           enc_secinfo,            dec_secinfo),
7109 #if defined(CONFIG_NFS_V4_1)
7110         PROC(EXCHANGE_ID,       enc_exchange_id,        dec_exchange_id),
7111         PROC(CREATE_SESSION,    enc_create_session,     dec_create_session),
7112         PROC(DESTROY_SESSION,   enc_destroy_session,    dec_destroy_session),
7113         PROC(SEQUENCE,          enc_sequence,           dec_sequence),
7114         PROC(GET_LEASE_TIME,    enc_get_lease_time,     dec_get_lease_time),
7115         PROC(RECLAIM_COMPLETE,  enc_reclaim_complete,   dec_reclaim_complete),
7116         PROC(GETDEVICEINFO,     enc_getdeviceinfo,      dec_getdeviceinfo),
7117         PROC(LAYOUTGET,         enc_layoutget,          dec_layoutget),
7118         PROC(LAYOUTCOMMIT,      enc_layoutcommit,       dec_layoutcommit),
7119         PROC(LAYOUTRETURN,      enc_layoutreturn,       dec_layoutreturn),
7120         PROC(SECINFO_NO_NAME,   enc_secinfo_no_name,    dec_secinfo_no_name),
7121         PROC(TEST_STATEID,      enc_test_stateid,       dec_test_stateid),
7122         PROC(FREE_STATEID,      enc_free_stateid,       dec_free_stateid),
7123         PROC(GETDEVICELIST,     enc_getdevicelist,      dec_getdevicelist),
7124 #endif /* CONFIG_NFS_V4_1 */
7125 };
7126
7127 struct rpc_version              nfs_version4 = {
7128         .number                 = 4,
7129         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
7130         .procs                  = nfs4_procedures
7131 };
7132
7133 /*
7134  * Local variables:
7135  *  c-basic-offset: 8
7136  * End:
7137  */