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/module.h>
  48 #include <linux/utsname.h>
  49 #include <linux/sunrpc/clnt.h>
  50 #include <linux/sunrpc/msg_prot.h>
  51 #include <linux/sunrpc/gss_api.h>
  52 #include <linux/nfs.h>
  53 #include <linux/nfs4.h>
  54 #include <linux/nfs_fs.h>
  55 #include <linux/nfs_idmap.h>
  56 #include "nfs4_fs.h"
  57 #include "internal.h"
  58 #include "pnfs.h"
  59
  60 #define NFSDBG_FACILITY         NFSDBG_XDR
  61
  62 /* Mapping from NFS error code to "errno" error code. */
  63 #define errno_NFSERR_IO         EIO
  64
  65 static int nfs4_stat_to_errno(int);
  66
  67 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
  68 #ifdef DEBUG
  69 #define NFS4_MAXTAGLEN          20
  70 #else
  71 #define NFS4_MAXTAGLEN          0
  72 #endif
  73
  74 /* lock,open owner id:
  75  * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT  >> 2)
  76  */
  77 #define open_owner_id_maxsz     (1 + 1 + 4)
  78 #define lock_owner_id_maxsz     (1 + 1 + 4)
  79 #define decode_lockowner_maxsz  (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  80 #define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  81 #define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  82 #define op_encode_hdr_maxsz     (1)
  83 #define op_decode_hdr_maxsz     (2)
  84 #define encode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  85 #define decode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  86 #define encode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  87 #define decode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  88 #define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
  89                                 (NFS4_FHSIZE >> 2))
  90 #define decode_putfh_maxsz      (op_decode_hdr_maxsz)
  91 #define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
  92 #define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
  93 #define encode_getfh_maxsz      (op_encode_hdr_maxsz)
  94 #define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
  95                                 ((3+NFS4_FHSIZE) >> 2))
  96 #define nfs4_fattr_bitmap_maxsz 4
  97 #define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
  98 #define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
  99 #define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
 100 #define nfs4_owner_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 101 #define nfs4_group_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 102 /* This is based on getfattr, which uses the most attributes: */
 103 #define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
 104                                 3 + 3 + 3 + nfs4_owner_maxsz + nfs4_group_maxsz))
 105 #define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
 106                                 nfs4_fattr_value_maxsz)
 107 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
 108 #define encode_attrs_maxsz      (nfs4_fattr_bitmap_maxsz + \
 109                                  1 + 2 + 1 + \
 110                                 nfs4_owner_maxsz + \
 111                                 nfs4_group_maxsz + \
 112                                 4 + 4)
 113 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
 114 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
 115 #define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
 116 #define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 117 #define encode_fsinfo_maxsz     (encode_getattr_maxsz)
 118 /* The 5 accounts for the PNFS attributes, and assumes that at most three
 119  * layout types will be returned.
 120  */
 121 #define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + \
 122                                  nfs4_fattr_bitmap_maxsz + 4 + 8 + 5)
 123 #define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 124 #define decode_renew_maxsz      (op_decode_hdr_maxsz)
 125 #define encode_setclientid_maxsz \
 126                                 (op_encode_hdr_maxsz + \
 127                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 128                                 XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
 129                                 1 /* sc_prog */ + \
 130                                 XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 131                                 XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
 132                                 1) /* sc_cb_ident */
 133 #define decode_setclientid_maxsz \
 134                                 (op_decode_hdr_maxsz + \
 135                                 2 + \
 136                                 1024) /* large value for CLID_INUSE */
 137 #define encode_setclientid_confirm_maxsz \
 138                                 (op_encode_hdr_maxsz + \
 139                                 3 + (NFS4_VERIFIER_SIZE >> 2))
 140 #define decode_setclientid_confirm_maxsz \
 141                                 (op_decode_hdr_maxsz)
 142 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
 143 #define decode_lookup_maxsz     (op_decode_hdr_maxsz)
 144 #define encode_share_access_maxsz \
 145                                 (2)
 146 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
 147 #define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
 148 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
 149 #define encode_open_maxsz       (op_encode_hdr_maxsz + \
 150                                 2 + encode_share_access_maxsz + 2 + \
 151                                 open_owner_id_maxsz + \
 152                                 encode_opentype_maxsz + \
 153                                 encode_claim_null_maxsz)
 154 #define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
 155 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
 156                                 decode_ace_maxsz)
 157 #define decode_change_info_maxsz        (5)
 158 #define decode_open_maxsz       (op_decode_hdr_maxsz + \
 159                                 decode_stateid_maxsz + \
 160                                 decode_change_info_maxsz + 1 + \
 161                                 nfs4_fattr_bitmap_maxsz + \
 162                                 decode_delegation_maxsz)
 163 #define encode_open_confirm_maxsz \
 164                                 (op_encode_hdr_maxsz + \
 165                                  encode_stateid_maxsz + 1)
 166 #define decode_open_confirm_maxsz \
 167                                 (op_decode_hdr_maxsz + \
 168                                  decode_stateid_maxsz)
 169 #define encode_open_downgrade_maxsz \
 170                                 (op_encode_hdr_maxsz + \
 171                                  encode_stateid_maxsz + 1 + \
 172                                  encode_share_access_maxsz)
 173 #define decode_open_downgrade_maxsz \
 174                                 (op_decode_hdr_maxsz + \
 175                                  decode_stateid_maxsz)
 176 #define encode_close_maxsz      (op_encode_hdr_maxsz + \
 177                                  1 + encode_stateid_maxsz)
 178 #define decode_close_maxsz      (op_decode_hdr_maxsz + \
 179                                  decode_stateid_maxsz)
 180 #define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
 181                                  encode_stateid_maxsz + \
 182                                  encode_attrs_maxsz)
 183 #define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
 184                                  nfs4_fattr_bitmap_maxsz)
 185 #define encode_read_maxsz       (op_encode_hdr_maxsz + \
 186                                  encode_stateid_maxsz + 3)
 187 #define decode_read_maxsz       (op_decode_hdr_maxsz + 2)
 188 #define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
 189                                  2 + encode_verifier_maxsz + 5)
 190 #define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
 191                                  decode_verifier_maxsz)
 192 #define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 193 #define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1)
 194 #define encode_write_maxsz      (op_encode_hdr_maxsz + \
 195                                  encode_stateid_maxsz + 4)
 196 #define decode_write_maxsz      (op_decode_hdr_maxsz + \
 197                                  2 + decode_verifier_maxsz)
 198 #define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
 199 #define decode_commit_maxsz     (op_decode_hdr_maxsz + \
 200                                  decode_verifier_maxsz)
 201 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 202                                 nfs4_name_maxsz)
 203 #define decode_remove_maxsz     (op_decode_hdr_maxsz + \
 204                                  decode_change_info_maxsz)
 205 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 206                                 2 * nfs4_name_maxsz)
 207 #define decode_rename_maxsz     (op_decode_hdr_maxsz + \
 208                                  decode_change_info_maxsz + \
 209                                  decode_change_info_maxsz)
 210 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 211                                 nfs4_name_maxsz)
 212 #define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
 213 #define encode_lockowner_maxsz  (7)
 214 #define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 215                                  7 + \
 216                                  1 + encode_stateid_maxsz + 1 + \
 217                                  encode_lockowner_maxsz)
 218 #define decode_lock_denied_maxsz \
 219                                 (8 + decode_lockowner_maxsz)
 220 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 221                                  decode_lock_denied_maxsz)
 222 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 5 + \
 223                                 encode_lockowner_maxsz)
 224 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 225                                  decode_lock_denied_maxsz)
 226 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 227                                  encode_stateid_maxsz + \
 228                                  4)
 229 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 230                                  decode_stateid_maxsz)
 231 #define encode_release_lockowner_maxsz \
 232                                 (op_encode_hdr_maxsz + \
 233                                  encode_lockowner_maxsz)
 234 #define decode_release_lockowner_maxsz \
 235                                 (op_decode_hdr_maxsz)
 236 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 237 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 238 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 239                                 1 + nfs4_name_maxsz + \
 240                                 1 + \
 241                                 nfs4_fattr_maxsz)
 242 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 243 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 244                                 1 + 2 + nfs4_name_maxsz + \
 245                                 encode_attrs_maxsz)
 246 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
 247                                 decode_change_info_maxsz + \
 248                                 nfs4_fattr_bitmap_maxsz)
 249 #define encode_statfs_maxsz     (encode_getattr_maxsz)
 250 #define decode_statfs_maxsz     (decode_getattr_maxsz)
 251 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 252 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 253 #define encode_getacl_maxsz     (encode_getattr_maxsz)
 254 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 255                                  nfs4_fattr_bitmap_maxsz + 1)
 256 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 257                                  encode_stateid_maxsz + 3)
 258 #define decode_setacl_maxsz     (decode_setattr_maxsz)
 259 #define encode_fs_locations_maxsz \
 260                                 (encode_getattr_maxsz)
 261 #define decode_fs_locations_maxsz \
 262                                 (0)
 263 #define encode_secinfo_maxsz    (op_encode_hdr_maxsz + nfs4_name_maxsz)
 264 #define decode_secinfo_maxsz    (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
 265
 266 #if defined(CONFIG_NFS_V4_1)
 267 #define NFS4_MAX_MACHINE_NAME_LEN (64)
 268
 269 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
 270                                 encode_verifier_maxsz + \
 271                                 1 /* co_ownerid.len */ + \
 272                                 XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
 273                                 1 /* flags */ + \
 274                                 1 /* spa_how */ + \
 275                                 0 /* SP4_NONE (for now) */ + \
 276                                 1 /* implementation id array of size 1 */ + \
 277                                 1 /* nii_domain */ + \
 278                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 279                                 1 /* nii_name */ + \
 280                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 281                                 3 /* nii_date */)
 282 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
 283                                 2 /* eir_clientid */ + \
 284                                 1 /* eir_sequenceid */ + \
 285                                 1 /* eir_flags */ + \
 286                                 1 /* spr_how */ + \
 287                                 0 /* SP4_NONE (for now) */ + \
 288                                 2 /* eir_server_owner.so_minor_id */ + \
 289                                 /* eir_server_owner.so_major_id<> */ \
 290                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 291                                 /* eir_server_scope<> */ \
 292                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 293                                 1 /* eir_server_impl_id array length */ + \
 294                                 1 /* nii_domain */ + \
 295                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 296                                 1 /* nii_name */ + \
 297                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 298                                 3 /* nii_date */)
 299 #define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
 300 #define decode_channel_attrs_maxsz  (6 + \
 301                                      1 /* ca_rdma_ird.len */ + \
 302                                      1 /* ca_rdma_ird */)
 303 #define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
 304                                      2 /* csa_clientid */ + \
 305                                      1 /* csa_sequence */ + \
 306                                      1 /* csa_flags */ + \
 307                                      encode_channel_attrs_maxsz + \
 308                                      encode_channel_attrs_maxsz + \
 309                                      1 /* csa_cb_program */ + \
 310                                      1 /* csa_sec_parms.len (1) */ + \
 311                                      1 /* cb_secflavor (AUTH_SYS) */ + \
 312                                      1 /* stamp */ + \
 313                                      1 /* machinename.len */ + \
 314                                      XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
 315                                      1 /* uid */ + \
 316                                      1 /* gid */ + \
 317                                      1 /* gids.len (0) */)
 318 #define decode_create_session_maxsz  (op_decode_hdr_maxsz +     \
 319                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 320                                      1 /* csr_sequence */ + \
 321                                      1 /* csr_flags */ + \
 322                                      decode_channel_attrs_maxsz + \
 323                                      decode_channel_attrs_maxsz)
 324 #define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
 325 #define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
 326 #define encode_sequence_maxsz   (op_encode_hdr_maxsz + \
 327                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
 328 #define decode_sequence_maxsz   (op_decode_hdr_maxsz + \
 329                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
 330 #define encode_reclaim_complete_maxsz   (op_encode_hdr_maxsz + 4)
 331 #define decode_reclaim_complete_maxsz   (op_decode_hdr_maxsz + 4)
 332 #define encode_getdevicelist_maxsz (op_encode_hdr_maxsz + 4 + \
 333                                 encode_verifier_maxsz)
 334 #define decode_getdevicelist_maxsz (op_decode_hdr_maxsz + \
 335                                 2 /* nfs_cookie4 gdlr_cookie */ + \
 336                                 decode_verifier_maxsz \
 337                                   /* verifier4 gdlr_verifier */ + \
 338                                 1 /* gdlr_deviceid_list count */ + \
 339                                 XDR_QUADLEN(NFS4_PNFS_GETDEVLIST_MAXNUM * \
 340                                             NFS4_DEVICEID4_SIZE) \
 341                                   /* gdlr_deviceid_list */ + \
 342                                 1 /* bool gdlr_eof */)
 343 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + 4 + \
 344                                 XDR_QUADLEN(NFS4_DEVICEID4_SIZE))
 345 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
 346                                 1 /* layout type */ + \
 347                                 1 /* opaque devaddr4 length */ + \
 348                                   /* devaddr4 payload is read into page */ \
 349                                 1 /* notification bitmap length */ + \
 350                                 1 /* notification bitmap */)
 351 #define encode_layoutget_maxsz  (op_encode_hdr_maxsz + 10 + \
 352                                 encode_stateid_maxsz)
 353 #define decode_layoutget_maxsz  (op_decode_hdr_maxsz + 8 + \
 354                                 decode_stateid_maxsz + \
 355                                 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
 356 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz +          \
 357                                 2 /* offset */ + \
 358                                 2 /* length */ + \
 359                                 1 /* reclaim */ + \
 360                                 encode_stateid_maxsz + \
 361                                 1 /* new offset (true) */ + \
 362                                 2 /* last byte written */ + \
 363                                 1 /* nt_timechanged (false) */ + \
 364                                 1 /* layoutupdate4 layout type */ + \
 365                                 1 /* NULL filelayout layoutupdate4 payload */)
 366 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
 367 #define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
 368                                 encode_stateid_maxsz + \
 369                                 1 /* FIXME: opaque lrf_body always empty at the moment */)
 370 #define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
 371                                 1 + decode_stateid_maxsz)
 372 #define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
 373 #define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
 374 #define encode_test_stateid_maxsz       (op_encode_hdr_maxsz + 2 + \
 375                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 376 #define decode_test_stateid_maxsz       (op_decode_hdr_maxsz + 2 + 1)
 377 #define encode_free_stateid_maxsz       (op_encode_hdr_maxsz + 1 + \
 378                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 379 #define decode_free_stateid_maxsz       (op_decode_hdr_maxsz + 1)
 380 #else /* CONFIG_NFS_V4_1 */
 381 #define encode_sequence_maxsz   0
 382 #define decode_sequence_maxsz   0
 383 #endif /* CONFIG_NFS_V4_1 */
 384
 385 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 386 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 387 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 388                                 encode_sequence_maxsz + \
 389                                 encode_putfh_maxsz + \
 390                                 encode_read_maxsz)
 391 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 392                                 decode_sequence_maxsz + \
 393                                 decode_putfh_maxsz + \
 394                                 decode_read_maxsz)
 395 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 396                                 encode_sequence_maxsz + \
 397                                 encode_putfh_maxsz + \
 398                                 encode_readlink_maxsz)
 399 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 400                                 decode_sequence_maxsz + \
 401                                 decode_putfh_maxsz + \
 402                                 decode_readlink_maxsz)
 403 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 404                                 encode_sequence_maxsz + \
 405                                 encode_putfh_maxsz + \
 406                                 encode_readdir_maxsz)
 407 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 408                                 decode_sequence_maxsz + \
 409                                 decode_putfh_maxsz + \
 410                                 decode_readdir_maxsz)
 411 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 412                                 encode_sequence_maxsz + \
 413                                 encode_putfh_maxsz + \
 414                                 encode_write_maxsz + \
 415                                 encode_getattr_maxsz)
 416 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 417                                 decode_sequence_maxsz + \
 418                                 decode_putfh_maxsz + \
 419                                 decode_write_maxsz + \
 420                                 decode_getattr_maxsz)
 421 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 422                                 encode_sequence_maxsz + \
 423                                 encode_putfh_maxsz + \
 424                                 encode_commit_maxsz + \
 425                                 encode_getattr_maxsz)
 426 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 427                                 decode_sequence_maxsz + \
 428                                 decode_putfh_maxsz + \
 429                                 decode_commit_maxsz + \
 430                                 decode_getattr_maxsz)
 431 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 432                                 encode_sequence_maxsz + \
 433                                 encode_putfh_maxsz + \
 434                                 encode_savefh_maxsz + \
 435                                 encode_open_maxsz + \
 436                                 encode_getfh_maxsz + \
 437                                 encode_getattr_maxsz + \
 438                                 encode_restorefh_maxsz + \
 439                                 encode_getattr_maxsz)
 440 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 441                                 decode_sequence_maxsz + \
 442                                 decode_putfh_maxsz + \
 443                                 decode_savefh_maxsz + \
 444                                 decode_open_maxsz + \
 445                                 decode_getfh_maxsz + \
 446                                 decode_getattr_maxsz + \
 447                                 decode_restorefh_maxsz + \
 448                                 decode_getattr_maxsz)
 449 #define NFS4_enc_open_confirm_sz \
 450                                 (compound_encode_hdr_maxsz + \
 451                                  encode_putfh_maxsz + \
 452                                  encode_open_confirm_maxsz)
 453 #define NFS4_dec_open_confirm_sz \
 454                                 (compound_decode_hdr_maxsz + \
 455                                  decode_putfh_maxsz + \
 456                                  decode_open_confirm_maxsz)
 457 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 458                                         encode_sequence_maxsz + \
 459                                         encode_putfh_maxsz + \
 460                                         encode_open_maxsz + \
 461                                         encode_getattr_maxsz)
 462 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 463                                         decode_sequence_maxsz + \
 464                                         decode_putfh_maxsz + \
 465                                         decode_open_maxsz + \
 466                                         decode_getattr_maxsz)
 467 #define NFS4_enc_open_downgrade_sz \
 468                                 (compound_encode_hdr_maxsz + \
 469                                  encode_sequence_maxsz + \
 470                                  encode_putfh_maxsz + \
 471                                  encode_open_downgrade_maxsz + \
 472                                  encode_getattr_maxsz)
 473 #define NFS4_dec_open_downgrade_sz \
 474                                 (compound_decode_hdr_maxsz + \
 475                                  decode_sequence_maxsz + \
 476                                  decode_putfh_maxsz + \
 477                                  decode_open_downgrade_maxsz + \
 478                                  decode_getattr_maxsz)
 479 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 480                                  encode_sequence_maxsz + \
 481                                  encode_putfh_maxsz + \
 482                                  encode_close_maxsz + \
 483                                  encode_getattr_maxsz)
 484 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 485                                  decode_sequence_maxsz + \
 486                                  decode_putfh_maxsz + \
 487                                  decode_close_maxsz + \
 488                                  decode_getattr_maxsz)
 489 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 490                                  encode_sequence_maxsz + \
 491                                  encode_putfh_maxsz + \
 492                                  encode_setattr_maxsz + \
 493                                  encode_getattr_maxsz)
 494 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 495                                  decode_sequence_maxsz + \
 496                                  decode_putfh_maxsz + \
 497                                  decode_setattr_maxsz + \
 498                                  decode_getattr_maxsz)
 499 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 500                                 encode_sequence_maxsz + \
 501                                 encode_putfh_maxsz + \
 502                                 encode_fsinfo_maxsz)
 503 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 504                                 decode_sequence_maxsz + \
 505                                 decode_putfh_maxsz + \
 506                                 decode_fsinfo_maxsz)
 507 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 508                                 encode_renew_maxsz)
 509 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 510                                 decode_renew_maxsz)
 511 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 512                                 encode_setclientid_maxsz)
 513 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 514                                 decode_setclientid_maxsz)
 515 #define NFS4_enc_setclientid_confirm_sz \
 516                                 (compound_encode_hdr_maxsz + \
 517                                 encode_setclientid_confirm_maxsz + \
 518                                 encode_putrootfh_maxsz + \
 519                                 encode_fsinfo_maxsz)
 520 #define NFS4_dec_setclientid_confirm_sz \
 521                                 (compound_decode_hdr_maxsz + \
 522                                 decode_setclientid_confirm_maxsz + \
 523                                 decode_putrootfh_maxsz + \
 524                                 decode_fsinfo_maxsz)
 525 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 526                                 encode_sequence_maxsz + \
 527                                 encode_putfh_maxsz + \
 528                                 encode_lock_maxsz)
 529 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 530                                 decode_sequence_maxsz + \
 531                                 decode_putfh_maxsz + \
 532                                 decode_lock_maxsz)
 533 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 534                                 encode_sequence_maxsz + \
 535                                 encode_putfh_maxsz + \
 536                                 encode_lockt_maxsz)
 537 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 538                                  decode_sequence_maxsz + \
 539                                  decode_putfh_maxsz + \
 540                                  decode_lockt_maxsz)
 541 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 542                                 encode_sequence_maxsz + \
 543                                 encode_putfh_maxsz + \
 544                                 encode_locku_maxsz)
 545 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 546                                 decode_sequence_maxsz + \
 547                                 decode_putfh_maxsz + \
 548                                 decode_locku_maxsz)
 549 #define NFS4_enc_release_lockowner_sz \
 550                                 (compound_encode_hdr_maxsz + \
 551                                  encode_lockowner_maxsz)
 552 #define NFS4_dec_release_lockowner_sz \
 553                                 (compound_decode_hdr_maxsz + \
 554                                  decode_lockowner_maxsz)
 555 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 556                                 encode_sequence_maxsz + \
 557                                 encode_putfh_maxsz + \
 558                                 encode_access_maxsz + \
 559                                 encode_getattr_maxsz)
 560 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 561                                 decode_sequence_maxsz + \
 562                                 decode_putfh_maxsz + \
 563                                 decode_access_maxsz + \
 564                                 decode_getattr_maxsz)
 565 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 566                                 encode_sequence_maxsz + \
 567                                 encode_putfh_maxsz + \
 568                                 encode_getattr_maxsz)
 569 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 570                                 decode_sequence_maxsz + \
 571                                 decode_putfh_maxsz + \
 572                                 decode_getattr_maxsz)
 573 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 574                                 encode_sequence_maxsz + \
 575                                 encode_putfh_maxsz + \
 576                                 encode_lookup_maxsz + \
 577                                 encode_getattr_maxsz + \
 578                                 encode_getfh_maxsz)
 579 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 580                                 decode_sequence_maxsz + \
 581                                 decode_putfh_maxsz + \
 582                                 decode_lookup_maxsz + \
 583                                 decode_getattr_maxsz + \
 584                                 decode_getfh_maxsz)
 585 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 586                                 encode_sequence_maxsz + \
 587                                 encode_putrootfh_maxsz + \
 588                                 encode_getattr_maxsz + \
 589                                 encode_getfh_maxsz)
 590 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 591                                 decode_sequence_maxsz + \
 592                                 decode_putrootfh_maxsz + \
 593                                 decode_getattr_maxsz + \
 594                                 decode_getfh_maxsz)
 595 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 596                                 encode_sequence_maxsz + \
 597                                 encode_putfh_maxsz + \
 598                                 encode_remove_maxsz + \
 599                                 encode_getattr_maxsz)
 600 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 601                                 decode_sequence_maxsz + \
 602                                 decode_putfh_maxsz + \
 603                                 decode_remove_maxsz + \
 604                                 decode_getattr_maxsz)
 605 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 606                                 encode_sequence_maxsz + \
 607                                 encode_putfh_maxsz + \
 608                                 encode_savefh_maxsz + \
 609                                 encode_putfh_maxsz + \
 610                                 encode_rename_maxsz + \
 611                                 encode_getattr_maxsz + \
 612                                 encode_restorefh_maxsz + \
 613                                 encode_getattr_maxsz)
 614 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 615                                 decode_sequence_maxsz + \
 616                                 decode_putfh_maxsz + \
 617                                 decode_savefh_maxsz + \
 618                                 decode_putfh_maxsz + \
 619                                 decode_rename_maxsz + \
 620                                 decode_getattr_maxsz + \
 621                                 decode_restorefh_maxsz + \
 622                                 decode_getattr_maxsz)
 623 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 624                                 encode_sequence_maxsz + \
 625                                 encode_putfh_maxsz + \
 626                                 encode_savefh_maxsz + \
 627                                 encode_putfh_maxsz + \
 628                                 encode_link_maxsz + \
 629                                 decode_getattr_maxsz + \
 630                                 encode_restorefh_maxsz + \
 631                                 decode_getattr_maxsz)
 632 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 633                                 decode_sequence_maxsz + \
 634                                 decode_putfh_maxsz + \
 635                                 decode_savefh_maxsz + \
 636                                 decode_putfh_maxsz + \
 637                                 decode_link_maxsz + \
 638                                 decode_getattr_maxsz + \
 639                                 decode_restorefh_maxsz + \
 640                                 decode_getattr_maxsz)
 641 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 642                                 encode_sequence_maxsz + \
 643                                 encode_putfh_maxsz + \
 644                                 encode_symlink_maxsz + \
 645                                 encode_getattr_maxsz + \
 646                                 encode_getfh_maxsz)
 647 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 648                                 decode_sequence_maxsz + \
 649                                 decode_putfh_maxsz + \
 650                                 decode_symlink_maxsz + \
 651                                 decode_getattr_maxsz + \
 652                                 decode_getfh_maxsz)
 653 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 654                                 encode_sequence_maxsz + \
 655                                 encode_putfh_maxsz + \
 656                                 encode_savefh_maxsz + \
 657                                 encode_create_maxsz + \
 658                                 encode_getfh_maxsz + \
 659                                 encode_getattr_maxsz + \
 660                                 encode_restorefh_maxsz + \
 661                                 encode_getattr_maxsz)
 662 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 663                                 decode_sequence_maxsz + \
 664                                 decode_putfh_maxsz + \
 665                                 decode_savefh_maxsz + \
 666                                 decode_create_maxsz + \
 667                                 decode_getfh_maxsz + \
 668                                 decode_getattr_maxsz + \
 669                                 decode_restorefh_maxsz + \
 670                                 decode_getattr_maxsz)
 671 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 672                                 encode_sequence_maxsz + \
 673                                 encode_putfh_maxsz + \
 674                                 encode_getattr_maxsz)
 675 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 676                                 decode_sequence_maxsz + \
 677                                 decode_putfh_maxsz + \
 678                                 decode_getattr_maxsz)
 679 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 680                                 encode_sequence_maxsz + \
 681                                 encode_putfh_maxsz + \
 682                                 encode_statfs_maxsz)
 683 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 684                                 decode_sequence_maxsz + \
 685                                 decode_putfh_maxsz + \
 686                                 decode_statfs_maxsz)
 687 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 688                                 encode_sequence_maxsz + \
 689                                 encode_putfh_maxsz + \
 690                                 encode_getattr_maxsz)
 691 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 692                                 decode_sequence_maxsz + \
 693                                 decode_putfh_maxsz + \
 694                                 decode_getattr_maxsz)
 695 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 696                                 encode_sequence_maxsz + \
 697                                 encode_putfh_maxsz + \
 698                                 encode_delegreturn_maxsz + \
 699                                 encode_getattr_maxsz)
 700 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 701                                 decode_sequence_maxsz + \
 702                                 decode_delegreturn_maxsz + \
 703                                 decode_getattr_maxsz)
 704 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 705                                 encode_sequence_maxsz + \
 706                                 encode_putfh_maxsz + \
 707                                 encode_getacl_maxsz)
 708 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 709                                 decode_sequence_maxsz + \
 710                                 decode_putfh_maxsz + \
 711                                 decode_getacl_maxsz)
 712 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 713                                 encode_sequence_maxsz + \
 714                                 encode_putfh_maxsz + \
 715                                 encode_setacl_maxsz)
 716 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 717                                 decode_sequence_maxsz + \
 718                                 decode_putfh_maxsz + \
 719                                 decode_setacl_maxsz)
 720 #define NFS4_enc_fs_locations_sz \
 721                                 (compound_encode_hdr_maxsz + \
 722                                  encode_sequence_maxsz + \
 723                                  encode_putfh_maxsz + \
 724                                  encode_lookup_maxsz + \
 725                                  encode_fs_locations_maxsz)
 726 #define NFS4_dec_fs_locations_sz \
 727                                 (compound_decode_hdr_maxsz + \
 728                                  decode_sequence_maxsz + \
 729                                  decode_putfh_maxsz + \
 730                                  decode_lookup_maxsz + \
 731                                  decode_fs_locations_maxsz)
 732 #define NFS4_enc_secinfo_sz     (compound_encode_hdr_maxsz + \
 733                                 encode_sequence_maxsz + \
 734                                 encode_putfh_maxsz + \
 735                                 encode_secinfo_maxsz)
 736 #define NFS4_dec_secinfo_sz     (compound_decode_hdr_maxsz + \
 737                                 decode_sequence_maxsz + \
 738                                 decode_putfh_maxsz + \
 739                                 decode_secinfo_maxsz)
 740 #if defined(CONFIG_NFS_V4_1)
 741 #define NFS4_enc_exchange_id_sz \
 742                                 (compound_encode_hdr_maxsz + \
 743                                  encode_exchange_id_maxsz)
 744 #define NFS4_dec_exchange_id_sz \
 745                                 (compound_decode_hdr_maxsz + \
 746                                  decode_exchange_id_maxsz)
 747 #define NFS4_enc_create_session_sz \
 748                                 (compound_encode_hdr_maxsz + \
 749                                  encode_create_session_maxsz)
 750 #define NFS4_dec_create_session_sz \
 751                                 (compound_decode_hdr_maxsz + \
 752                                  decode_create_session_maxsz)
 753 #define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
 754                                          encode_destroy_session_maxsz)
 755 #define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
 756                                          decode_destroy_session_maxsz)
 757 #define NFS4_enc_sequence_sz \
 758                                 (compound_decode_hdr_maxsz + \
 759                                  encode_sequence_maxsz)
 760 #define NFS4_dec_sequence_sz \
 761                                 (compound_decode_hdr_maxsz + \
 762                                  decode_sequence_maxsz)
 763 #define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
 764                                          encode_sequence_maxsz + \
 765                                          encode_putrootfh_maxsz + \
 766                                          encode_fsinfo_maxsz)
 767 #define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
 768                                          decode_sequence_maxsz + \
 769                                          decode_putrootfh_maxsz + \
 770                                          decode_fsinfo_maxsz)
 771 #define NFS4_enc_reclaim_complete_sz    (compound_encode_hdr_maxsz + \
 772                                          encode_sequence_maxsz + \
 773                                          encode_reclaim_complete_maxsz)
 774 #define NFS4_dec_reclaim_complete_sz    (compound_decode_hdr_maxsz + \
 775                                          decode_sequence_maxsz + \
 776                                          decode_reclaim_complete_maxsz)
 777 #define NFS4_enc_getdevicelist_sz (compound_encode_hdr_maxsz + \
 778                                 encode_sequence_maxsz + \
 779                                 encode_putfh_maxsz + \
 780                                 encode_getdevicelist_maxsz)
 781 #define NFS4_dec_getdevicelist_sz (compound_decode_hdr_maxsz + \
 782                                 decode_sequence_maxsz + \
 783                                 decode_putfh_maxsz + \
 784                                 decode_getdevicelist_maxsz)
 785 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
 786                                 encode_sequence_maxsz +\
 787                                 encode_getdeviceinfo_maxsz)
 788 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
 789                                 decode_sequence_maxsz + \
 790                                 decode_getdeviceinfo_maxsz)
 791 #define NFS4_enc_layoutget_sz   (compound_encode_hdr_maxsz + \
 792                                 encode_sequence_maxsz + \
 793                                 encode_putfh_maxsz +        \
 794                                 encode_layoutget_maxsz)
 795 #define NFS4_dec_layoutget_sz   (compound_decode_hdr_maxsz + \
 796                                 decode_sequence_maxsz + \
 797                                 decode_putfh_maxsz +        \
 798                                 decode_layoutget_maxsz)
 799 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
 800                                 encode_sequence_maxsz +\
 801                                 encode_putfh_maxsz + \
 802                                 encode_layoutcommit_maxsz + \
 803                                 encode_getattr_maxsz)
 804 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
 805                                 decode_sequence_maxsz + \
 806                                 decode_putfh_maxsz + \
 807                                 decode_layoutcommit_maxsz + \
 808                                 decode_getattr_maxsz)
 809 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
 810                                 encode_sequence_maxsz + \
 811                                 encode_putfh_maxsz + \
 812                                 encode_layoutreturn_maxsz)
 813 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
 814                                 decode_sequence_maxsz + \
 815                                 decode_putfh_maxsz + \
 816                                 decode_layoutreturn_maxsz)
 817 #define NFS4_enc_secinfo_no_name_sz     (compound_encode_hdr_maxsz + \
 818                                         encode_sequence_maxsz + \
 819                                         encode_putrootfh_maxsz +\
 820                                         encode_secinfo_no_name_maxsz)
 821 #define NFS4_dec_secinfo_no_name_sz     (compound_decode_hdr_maxsz + \
 822                                         decode_sequence_maxsz + \
 823                                         decode_putrootfh_maxsz + \
 824                                         decode_secinfo_no_name_maxsz)
 825 #define NFS4_enc_test_stateid_sz        (compound_encode_hdr_maxsz + \
 826                                          encode_sequence_maxsz + \
 827                                          encode_test_stateid_maxsz)
 828 #define NFS4_dec_test_stateid_sz        (compound_decode_hdr_maxsz + \
 829                                          decode_sequence_maxsz + \
 830                                          decode_test_stateid_maxsz)
 831 #define NFS4_enc_free_stateid_sz        (compound_encode_hdr_maxsz + \
 832                                          encode_sequence_maxsz + \
 833                                          encode_free_stateid_maxsz)
 834 #define NFS4_dec_free_stateid_sz        (compound_decode_hdr_maxsz + \
 835                                          decode_sequence_maxsz + \
 836                                          decode_free_stateid_maxsz)
 837
 838 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 839                                       compound_encode_hdr_maxsz +
 840                                       encode_sequence_maxsz +
 841                                       encode_putfh_maxsz +
 842                                       encode_getattr_maxsz) *
 843                                      XDR_UNIT);
 844
 845 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 846                                      compound_decode_hdr_maxsz +
 847                                      decode_sequence_maxsz +
 848                                      decode_putfh_maxsz) *
 849                                     XDR_UNIT);
 850 #endif /* CONFIG_NFS_V4_1 */
 851
 852 static unsigned short send_implementation_id = 1;
 853
 854 module_param(send_implementation_id, ushort, 0644);
 855 MODULE_PARM_DESC(send_implementation_id,
 856                 "Send implementation ID with NFSv4.1 exchange_id");
 857
 858 static const umode_t nfs_type2fmt[] = {
 859         [NF4BAD] = 0,
 860         [NF4REG] = S_IFREG,
 861         [NF4DIR] = S_IFDIR,
 862         [NF4BLK] = S_IFBLK,
 863         [NF4CHR] = S_IFCHR,
 864         [NF4LNK] = S_IFLNK,
 865         [NF4SOCK] = S_IFSOCK,
 866         [NF4FIFO] = S_IFIFO,
 867         [NF4ATTRDIR] = 0,
 868         [NF4NAMEDATTR] = 0,
 869 };
 870
 871 struct compound_hdr {
 872         int32_t         status;
 873         uint32_t        nops;
 874         __be32 *        nops_p;
 875         uint32_t        taglen;
 876         char *          tag;
 877         uint32_t        replen;         /* expected reply words */
 878         u32             minorversion;
 879 };
 880
 881 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
 882 {
 883         __be32 *p = xdr_reserve_space(xdr, nbytes);
 884         BUG_ON(!p);
 885         return p;
 886 }
 887
 888 static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
 889 {
 890         __be32 *p;
 891
 892         p = xdr_reserve_space(xdr, len);
 893         xdr_encode_opaque_fixed(p, buf, len);
 894 }
 895
 896 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 897 {
 898         __be32 *p;
 899
 900         p = reserve_space(xdr, 4 + len);
 901         xdr_encode_opaque(p, str, len);
 902 }
 903
 904 static void encode_uint32(struct xdr_stream *xdr, u32 n)
 905 {
 906         __be32 *p;
 907
 908         p = reserve_space(xdr, 4);
 909         *p = cpu_to_be32(n);
 910 }
 911
 912 static void encode_nfs4_seqid(struct xdr_stream *xdr,
 913                 const struct nfs_seqid *seqid)
 914 {
 915         encode_uint32(xdr, seqid->sequence->counter);
 916 }
 917
 918 static void encode_compound_hdr(struct xdr_stream *xdr,
 919                                 struct rpc_rqst *req,
 920                                 struct compound_hdr *hdr)
 921 {
 922         __be32 *p;
 923         struct rpc_auth *auth = req->rq_cred->cr_auth;
 924
 925         /* initialize running count of expected bytes in reply.
 926          * NOTE: the replied tag SHOULD be the same is the one sent,
 927          * but this is not required as a MUST for the server to do so. */
 928         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
 929
 930         BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
 931         encode_string(xdr, hdr->taglen, hdr->tag);
 932         p = reserve_space(xdr, 8);
 933         *p++ = cpu_to_be32(hdr->minorversion);
 934         hdr->nops_p = p;
 935         *p = cpu_to_be32(hdr->nops);
 936 }
 937
 938 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
 939                 uint32_t replen,
 940                 struct compound_hdr *hdr)
 941 {
 942         encode_uint32(xdr, op);
 943         hdr->nops++;
 944         hdr->replen += replen;
 945 }
 946
 947 static void encode_nops(struct compound_hdr *hdr)
 948 {
 949         BUG_ON(hdr->nops > NFS4_MAX_OPS);
 950         *hdr->nops_p = htonl(hdr->nops);
 951 }
 952
 953 static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
 954 {
 955         encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
 956 }
 957
 958 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 959 {
 960         encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
 961 }
 962
 963 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
 964 {
 965         char owner_name[IDMAP_NAMESZ];
 966         char owner_group[IDMAP_NAMESZ];
 967         int owner_namelen = 0;
 968         int owner_grouplen = 0;
 969         __be32 *p;
 970         __be32 *q;
 971         int len;
 972         uint32_t bmval0 = 0;
 973         uint32_t bmval1 = 0;
 974
 975         /*
 976          * We reserve enough space to write the entire attribute buffer at once.
 977          * In the worst-case, this would be
 978          *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
 979          *          = 36 bytes, plus any contribution from variable-length fields
 980          *            such as owner/group.
 981          */
 982         len = 16;
 983
 984         /* Sigh */
 985         if (iap->ia_valid & ATTR_SIZE)
 986                 len += 8;
 987         if (iap->ia_valid & ATTR_MODE)
 988                 len += 4;
 989         if (iap->ia_valid & ATTR_UID) {
 990                 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
 991                 if (owner_namelen < 0) {
 992                         dprintk("nfs: couldn't resolve uid %d to string\n",
 993                                         iap->ia_uid);
 994                         /* XXX */
 995                         strcpy(owner_name, "nobody");
 996                         owner_namelen = sizeof("nobody") - 1;
 997                         /* goto out; */
 998                 }
 999                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1000         }
1001         if (iap->ia_valid & ATTR_GID) {
1002                 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1003                 if (owner_grouplen < 0) {
1004                         dprintk("nfs: couldn't resolve gid %d to string\n",
1005                                         iap->ia_gid);
1006                         strcpy(owner_group, "nobody");
1007                         owner_grouplen = sizeof("nobody") - 1;
1008                         /* goto out; */
1009                 }
1010                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1011         }
1012         if (iap->ia_valid & ATTR_ATIME_SET)
1013                 len += 16;
1014         else if (iap->ia_valid & ATTR_ATIME)
1015                 len += 4;
1016         if (iap->ia_valid & ATTR_MTIME_SET)
1017                 len += 16;
1018         else if (iap->ia_valid & ATTR_MTIME)
1019                 len += 4;
1020         p = reserve_space(xdr, len);
1021
1022         /*
1023          * We write the bitmap length now, but leave the bitmap and the attribute
1024          * buffer length to be backfilled at the end of this routine.
1025          */
1026         *p++ = cpu_to_be32(2);
1027         q = p;
1028         p += 3;
1029
1030         if (iap->ia_valid & ATTR_SIZE) {
1031                 bmval0 |= FATTR4_WORD0_SIZE;
1032                 p = xdr_encode_hyper(p, iap->ia_size);
1033         }
1034         if (iap->ia_valid & ATTR_MODE) {
1035                 bmval1 |= FATTR4_WORD1_MODE;
1036                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1037         }
1038         if (iap->ia_valid & ATTR_UID) {
1039                 bmval1 |= FATTR4_WORD1_OWNER;
1040                 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1041         }
1042         if (iap->ia_valid & ATTR_GID) {
1043                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
1044                 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1045         }
1046         if (iap->ia_valid & ATTR_ATIME_SET) {
1047                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
1048                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1049                 *p++ = cpu_to_be32(0);
1050                 *p++ = cpu_to_be32(iap->ia_atime.tv_sec);
1051                 *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
1052         }
1053         else if (iap->ia_valid & ATTR_ATIME) {
1054                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
1055                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1056         }
1057         if (iap->ia_valid & ATTR_MTIME_SET) {
1058                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
1059                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1060                 *p++ = cpu_to_be32(0);
1061                 *p++ = cpu_to_be32(iap->ia_mtime.tv_sec);
1062                 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1063         }
1064         else if (iap->ia_valid & ATTR_MTIME) {
1065                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
1066                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1067         }
1068
1069         /*
1070          * Now we backfill the bitmap and the attribute buffer length.
1071          */
1072         if (len != ((char *)p - (char *)q) + 4) {
1073                 printk(KERN_ERR "NFS: Attr length error, %u != %Zu\n",
1074                                 len, ((char *)p - (char *)q) + 4);
1075                 BUG();
1076         }
1077         len = (char *)p - (char *)q - 12;
1078         *q++ = htonl(bmval0);
1079         *q++ = htonl(bmval1);
1080         *q = htonl(len);
1081
1082 /* out: */
1083 }
1084
1085 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1086 {
1087         __be32 *p;
1088
1089         p = reserve_space(xdr, 8);
1090         *p++ = cpu_to_be32(OP_ACCESS);
1091         *p = cpu_to_be32(access);
1092         hdr->nops++;
1093         hdr->replen += decode_access_maxsz;
1094 }
1095
1096 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1097 {
1098         encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1099         encode_nfs4_seqid(xdr, arg->seqid);
1100         encode_nfs4_stateid(xdr, arg->stateid);
1101 }
1102
1103 static void encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1104 {
1105         __be32 *p;
1106
1107         p = reserve_space(xdr, 16);
1108         *p++ = cpu_to_be32(OP_COMMIT);
1109         p = xdr_encode_hyper(p, args->offset);
1110         *p = cpu_to_be32(args->count);
1111         hdr->nops++;
1112         hdr->replen += decode_commit_maxsz;
1113 }
1114
1115 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1116 {
1117         __be32 *p;
1118
1119         p = reserve_space(xdr, 8);
1120         *p++ = cpu_to_be32(OP_CREATE);
1121         *p = cpu_to_be32(create->ftype);
1122
1123         switch (create->ftype) {
1124         case NF4LNK:
1125                 p = reserve_space(xdr, 4);
1126                 *p = cpu_to_be32(create->u.symlink.len);
1127                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
1128                 break;
1129
1130         case NF4BLK: case NF4CHR:
1131                 p = reserve_space(xdr, 8);
1132                 *p++ = cpu_to_be32(create->u.device.specdata1);
1133                 *p = cpu_to_be32(create->u.device.specdata2);
1134                 break;
1135
1136         default:
1137                 break;
1138         }
1139
1140         encode_string(xdr, create->name->len, create->name->name);
1141         hdr->nops++;
1142         hdr->replen += decode_create_maxsz;
1143
1144         encode_attrs(xdr, create->attrs, create->server);
1145 }
1146
1147 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1148 {
1149         __be32 *p;
1150
1151         p = reserve_space(xdr, 12);
1152         *p++ = cpu_to_be32(OP_GETATTR);
1153         *p++ = cpu_to_be32(1);
1154         *p = cpu_to_be32(bitmap);
1155         hdr->nops++;
1156         hdr->replen += decode_getattr_maxsz;
1157 }
1158
1159 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1160 {
1161         __be32 *p;
1162
1163         p = reserve_space(xdr, 16);
1164         *p++ = cpu_to_be32(OP_GETATTR);
1165         *p++ = cpu_to_be32(2);
1166         *p++ = cpu_to_be32(bm0);
1167         *p = cpu_to_be32(bm1);
1168         hdr->nops++;
1169         hdr->replen += decode_getattr_maxsz;
1170 }
1171
1172 static void
1173 encode_getattr_three(struct xdr_stream *xdr,
1174                      uint32_t bm0, uint32_t bm1, uint32_t bm2,
1175                      struct compound_hdr *hdr)
1176 {
1177         __be32 *p;
1178
1179         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1180         if (bm2) {
1181                 p = reserve_space(xdr, 16);
1182                 *p++ = cpu_to_be32(3);
1183                 *p++ = cpu_to_be32(bm0);
1184                 *p++ = cpu_to_be32(bm1);
1185                 *p = cpu_to_be32(bm2);
1186         } else if (bm1) {
1187                 p = reserve_space(xdr, 12);
1188                 *p++ = cpu_to_be32(2);
1189                 *p++ = cpu_to_be32(bm0);
1190                 *p = cpu_to_be32(bm1);
1191         } else {
1192                 p = reserve_space(xdr, 8);
1193                 *p++ = cpu_to_be32(1);
1194                 *p = cpu_to_be32(bm0);
1195         }
1196 }
1197
1198 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1199 {
1200         encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1201                            bitmask[1] & nfs4_fattr_bitmap[1], hdr);
1202 }
1203
1204 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1205 {
1206         encode_getattr_three(xdr,
1207                              bitmask[0] & nfs4_fsinfo_bitmap[0],
1208                              bitmask[1] & nfs4_fsinfo_bitmap[1],
1209                              bitmask[2] & nfs4_fsinfo_bitmap[2],
1210                              hdr);
1211 }
1212
1213 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1214 {
1215         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1216                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1217 }
1218
1219 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1220 {
1221         encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1222 }
1223
1224 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1225 {
1226         encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1227         encode_string(xdr, name->len, name->name);
1228 }
1229
1230 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1231 {
1232         if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
1233                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1234         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1235 }
1236
1237 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1238 {
1239         if (fl->fl_end == OFFSET_MAX)
1240                 return ~(uint64_t)0;
1241         return fl->fl_end - fl->fl_start + 1;
1242 }
1243
1244 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1245 {
1246         __be32 *p;
1247
1248         p = reserve_space(xdr, 32);
1249         p = xdr_encode_hyper(p, lowner->clientid);
1250         *p++ = cpu_to_be32(20);
1251         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1252         *p++ = cpu_to_be32(lowner->s_dev);
1253         xdr_encode_hyper(p, lowner->id);
1254 }
1255
1256 /*
1257  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1258  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1259  */
1260 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1261 {
1262         __be32 *p;
1263
1264         p = reserve_space(xdr, 32);
1265         *p++ = cpu_to_be32(OP_LOCK);
1266         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1267         *p++ = cpu_to_be32(args->reclaim);
1268         p = xdr_encode_hyper(p, args->fl->fl_start);
1269         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1270         *p = cpu_to_be32(args->new_lock_owner);
1271         if (args->new_lock_owner){
1272                 encode_nfs4_seqid(xdr, args->open_seqid);
1273                 encode_nfs4_stateid(xdr, args->open_stateid);
1274                 encode_nfs4_seqid(xdr, args->lock_seqid);
1275                 encode_lockowner(xdr, &args->lock_owner);
1276         }
1277         else {
1278                 encode_nfs4_stateid(xdr, args->lock_stateid);
1279                 encode_nfs4_seqid(xdr, args->lock_seqid);
1280         }
1281         hdr->nops++;
1282         hdr->replen += decode_lock_maxsz;
1283 }
1284
1285 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1286 {
1287         __be32 *p;
1288
1289         p = reserve_space(xdr, 24);
1290         *p++ = cpu_to_be32(OP_LOCKT);
1291         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1292         p = xdr_encode_hyper(p, args->fl->fl_start);
1293         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1294         encode_lockowner(xdr, &args->lock_owner);
1295         hdr->nops++;
1296         hdr->replen += decode_lockt_maxsz;
1297 }
1298
1299 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1300 {
1301         __be32 *p;
1302
1303         p = reserve_space(xdr, 8);
1304         *p++ = cpu_to_be32(OP_LOCKU);
1305         *p = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1306         encode_nfs4_seqid(xdr, args->seqid);
1307         encode_nfs4_stateid(xdr, args->stateid);
1308         p = reserve_space(xdr, 16);
1309         p = xdr_encode_hyper(p, args->fl->fl_start);
1310         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1311         hdr->nops++;
1312         hdr->replen += decode_locku_maxsz;
1313 }
1314
1315 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1316 {
1317         encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1318         encode_lockowner(xdr, lowner);
1319 }
1320
1321 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1322 {
1323         encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1324         encode_string(xdr, name->len, name->name);
1325 }
1326
1327 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1328 {
1329         __be32 *p;
1330
1331         p = reserve_space(xdr, 8);
1332         switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1333         case FMODE_READ:
1334                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1335                 break;
1336         case FMODE_WRITE:
1337                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1338                 break;
1339         case FMODE_READ|FMODE_WRITE:
1340                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1341                 break;
1342         default:
1343                 *p++ = cpu_to_be32(0);
1344         }
1345         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1346 }
1347
1348 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1349 {
1350         __be32 *p;
1351  /*
1352  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1353  * owner 4 = 32
1354  */
1355         encode_nfs4_seqid(xdr, arg->seqid);
1356         encode_share_access(xdr, arg->fmode);
1357         p = reserve_space(xdr, 32);
1358         p = xdr_encode_hyper(p, arg->clientid);
1359         *p++ = cpu_to_be32(20);
1360         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1361         *p++ = cpu_to_be32(arg->server->s_dev);
1362         xdr_encode_hyper(p, arg->id);
1363 }
1364
1365 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1366 {
1367         __be32 *p;
1368         struct nfs_client *clp;
1369
1370         p = reserve_space(xdr, 4);
1371         switch(arg->open_flags & O_EXCL) {
1372         case 0:
1373                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1374                 encode_attrs(xdr, arg->u.attrs, arg->server);
1375                 break;
1376         default:
1377                 clp = arg->server->nfs_client;
1378                 if (clp->cl_mvops->minor_version > 0) {
1379                         if (nfs4_has_persistent_session(clp)) {
1380                                 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1381                                 encode_attrs(xdr, arg->u.attrs, arg->server);
1382                         } else {
1383                                 struct iattr dummy;
1384
1385                                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1386                                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1387                                 dummy.ia_valid = 0;
1388                                 encode_attrs(xdr, &dummy, arg->server);
1389                         }
1390                 } else {
1391                         *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1392                         encode_nfs4_verifier(xdr, &arg->u.verifier);
1393                 }
1394         }
1395 }
1396
1397 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1398 {
1399         __be32 *p;
1400
1401         p = reserve_space(xdr, 4);
1402         switch (arg->open_flags & O_CREAT) {
1403         case 0:
1404                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1405                 break;
1406         default:
1407                 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1408                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1409                 encode_createmode(xdr, arg);
1410         }
1411 }
1412
1413 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1414 {
1415         __be32 *p;
1416
1417         p = reserve_space(xdr, 4);
1418         switch (delegation_type) {
1419         case 0:
1420                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1421                 break;
1422         case FMODE_READ:
1423                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1424                 break;
1425         case FMODE_WRITE|FMODE_READ:
1426                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1427                 break;
1428         default:
1429                 BUG();
1430         }
1431 }
1432
1433 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1434 {
1435         __be32 *p;
1436
1437         p = reserve_space(xdr, 4);
1438         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1439         encode_string(xdr, name->len, name->name);
1440 }
1441
1442 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1443 {
1444         __be32 *p;
1445
1446         p = reserve_space(xdr, 4);
1447         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1448         encode_delegation_type(xdr, type);
1449 }
1450
1451 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1452 {
1453         __be32 *p;
1454
1455         p = reserve_space(xdr, 4);
1456         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1457         encode_nfs4_stateid(xdr, stateid);
1458         encode_string(xdr, name->len, name->name);
1459 }
1460
1461 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1462 {
1463         encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1464         encode_openhdr(xdr, arg);
1465         encode_opentype(xdr, arg);
1466         switch (arg->claim) {
1467         case NFS4_OPEN_CLAIM_NULL:
1468                 encode_claim_null(xdr, arg->name);
1469                 break;
1470         case NFS4_OPEN_CLAIM_PREVIOUS:
1471                 encode_claim_previous(xdr, arg->u.delegation_type);
1472                 break;
1473         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1474                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1475                 break;
1476         default:
1477                 BUG();
1478         }
1479 }
1480
1481 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1482 {
1483         encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1484         encode_nfs4_stateid(xdr, arg->stateid);
1485         encode_nfs4_seqid(xdr, arg->seqid);
1486 }
1487
1488 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1489 {
1490         encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1491         encode_nfs4_stateid(xdr, arg->stateid);
1492         encode_nfs4_seqid(xdr, arg->seqid);
1493         encode_share_access(xdr, arg->fmode);
1494 }
1495
1496 static void
1497 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1498 {
1499         encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1500         encode_string(xdr, fh->size, fh->data);
1501 }
1502
1503 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1504 {
1505         encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1506 }
1507
1508 static void encode_open_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx, const struct nfs_lock_context *l_ctx, int zero_seqid)
1509 {
1510         nfs4_stateid stateid;
1511
1512         if (ctx->state != NULL) {
1513                 nfs4_select_rw_stateid(&stateid, ctx->state, l_ctx->lockowner, l_ctx->pid);
1514                 if (zero_seqid)
1515                         stateid.seqid = 0;
1516                 encode_nfs4_stateid(xdr, &stateid);
1517         } else
1518                 encode_nfs4_stateid(xdr, &zero_stateid);
1519 }
1520
1521 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1522 {
1523         __be32 *p;
1524
1525         encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1526         encode_open_stateid(xdr, args->context, args->lock_context,
1527                        hdr->minorversion);
1528
1529         p = reserve_space(xdr, 12);
1530         p = xdr_encode_hyper(p, args->offset);
1531         *p = cpu_to_be32(args->count);
1532 }
1533
1534 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1535 {
1536         uint32_t attrs[2] = {
1537                 FATTR4_WORD0_RDATTR_ERROR,
1538                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1539         };
1540         uint32_t dircount = readdir->count >> 1;
1541         __be32 *p, verf[2];
1542
1543         if (readdir->plus) {
1544                 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1545                         FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1546                 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1547                         FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1548                         FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1549                         FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1550                 dircount >>= 1;
1551         }
1552         /* Use mounted_on_fileid only if the server supports it */
1553         if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1554                 attrs[0] |= FATTR4_WORD0_FILEID;
1555
1556         p = reserve_space(xdr, 12);
1557         *p++ = cpu_to_be32(OP_READDIR);
1558         p = xdr_encode_hyper(p, readdir->cookie);
1559         encode_nfs4_verifier(xdr, &readdir->verifier);
1560         p = reserve_space(xdr, 20);
1561         *p++ = cpu_to_be32(dircount);
1562         *p++ = cpu_to_be32(readdir->count);
1563         *p++ = cpu_to_be32(2);
1564
1565         *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1566         *p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1567         hdr->nops++;
1568         hdr->replen += decode_readdir_maxsz;
1569         memcpy(verf, readdir->verifier.data, sizeof(verf));
1570         dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1571                         __func__,
1572                         (unsigned long long)readdir->cookie,
1573                         verf[0], verf[1],
1574                         attrs[0] & readdir->bitmask[0],
1575                         attrs[1] & readdir->bitmask[1]);
1576 }
1577
1578 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1579 {
1580         encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1581 }
1582
1583 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1584 {
1585         encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1586         encode_string(xdr, name->len, name->name);
1587 }
1588
1589 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1590 {
1591         encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1592         encode_string(xdr, oldname->len, oldname->name);
1593         encode_string(xdr, newname->len, newname->name);
1594 }
1595
1596 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1597                          struct compound_hdr *hdr)
1598 {
1599         __be32 *p;
1600
1601         p = reserve_space(xdr, 12);
1602         *p++ = cpu_to_be32(OP_RENEW);
1603         xdr_encode_hyper(p, clid);
1604         hdr->nops++;
1605         hdr->replen += decode_renew_maxsz;
1606 }
1607
1608 static void
1609 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1610 {
1611         encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1612 }
1613
1614 static void
1615 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1616 {
1617         __be32 *p;
1618
1619         encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1620         encode_nfs4_stateid(xdr, &zero_stateid);
1621         p = reserve_space(xdr, 2*4);
1622         *p++ = cpu_to_be32(1);
1623         *p = cpu_to_be32(FATTR4_WORD0_ACL);
1624         BUG_ON(arg->acl_len % 4);
1625         p = reserve_space(xdr, 4);
1626         *p = cpu_to_be32(arg->acl_len);
1627         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1628 }
1629
1630 static void
1631 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1632 {
1633         encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1634 }
1635
1636 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1637 {
1638         encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1639         encode_nfs4_stateid(xdr, &arg->stateid);
1640         encode_attrs(xdr, arg->iap, server);
1641 }
1642
1643 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1644 {
1645         __be32 *p;
1646
1647         p = reserve_space(xdr, 4);
1648         *p = cpu_to_be32(OP_SETCLIENTID);
1649         encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1650
1651         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1652         p = reserve_space(xdr, 4);
1653         *p = cpu_to_be32(setclientid->sc_prog);
1654         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1655         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1656         p = reserve_space(xdr, 4);
1657         *p = cpu_to_be32(setclientid->sc_cb_ident);
1658         hdr->nops++;
1659         hdr->replen += decode_setclientid_maxsz;
1660 }
1661
1662 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1663 {
1664         __be32 *p;
1665
1666         p = reserve_space(xdr, 12);
1667         *p++ = cpu_to_be32(OP_SETCLIENTID_CONFIRM);
1668         p = xdr_encode_hyper(p, arg->clientid);
1669         encode_nfs4_verifier(xdr, &arg->confirm);
1670         hdr->nops++;
1671         hdr->replen += decode_setclientid_confirm_maxsz;
1672 }
1673
1674 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1675 {
1676         __be32 *p;
1677
1678         encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1679         encode_open_stateid(xdr, args->context, args->lock_context,
1680                        hdr->minorversion);
1681
1682         p = reserve_space(xdr, 16);
1683         p = xdr_encode_hyper(p, args->offset);
1684         *p++ = cpu_to_be32(args->stable);
1685         *p = cpu_to_be32(args->count);
1686
1687         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1688 }
1689
1690 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1691 {
1692         encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1693         encode_nfs4_stateid(xdr, stateid);
1694 }
1695
1696 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1697 {
1698         encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1699         encode_string(xdr, name->len, name->name);
1700 }
1701
1702 #if defined(CONFIG_NFS_V4_1)
1703 /* NFSv4.1 operations */
1704 static void encode_exchange_id(struct xdr_stream *xdr,
1705                                struct nfs41_exchange_id_args *args,
1706                                struct compound_hdr *hdr)
1707 {
1708         __be32 *p;
1709         char impl_name[NFS4_OPAQUE_LIMIT];
1710         int len = 0;
1711
1712         p = reserve_space(xdr, 4);
1713         *p = cpu_to_be32(OP_EXCHANGE_ID);
1714         encode_nfs4_verifier(xdr, args->verifier);
1715
1716         encode_string(xdr, args->id_len, args->id);
1717
1718         p = reserve_space(xdr, 12);
1719         *p++ = cpu_to_be32(args->flags);
1720         *p++ = cpu_to_be32(0);  /* zero length state_protect4_a */
1721
1722         if (send_implementation_id &&
1723             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1724             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1725                 <= NFS4_OPAQUE_LIMIT + 1)
1726                 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1727                                utsname()->sysname, utsname()->release,
1728                                utsname()->version, utsname()->machine);
1729
1730         if (len > 0) {
1731                 *p = cpu_to_be32(1);    /* implementation id array length=1 */
1732
1733                 encode_string(xdr,
1734                         sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1735                         CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1736                 encode_string(xdr, len, impl_name);
1737                 /* just send zeros for nii_date - the date is in nii_name */
1738                 p = reserve_space(xdr, 12);
1739                 p = xdr_encode_hyper(p, 0);
1740                 *p = cpu_to_be32(0);
1741         } else
1742                 *p = cpu_to_be32(0);    /* implementation id array length=0 */
1743
1744         hdr->nops++;
1745         hdr->replen += decode_exchange_id_maxsz;
1746 }
1747
1748 static void encode_create_session(struct xdr_stream *xdr,
1749                                   struct nfs41_create_session_args *args,
1750                                   struct compound_hdr *hdr)
1751 {
1752         __be32 *p;
1753         char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1754         uint32_t len;
1755         struct nfs_client *clp = args->client;
1756         u32 max_resp_sz_cached;
1757
1758         /*
1759          * Assumes OPEN is the biggest non-idempotent compound.
1760          * 2 is the verifier.
1761          */
1762         max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1763                               RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1764
1765         len = scnprintf(machine_name, sizeof(machine_name), "%s",
1766                         clp->cl_ipaddr);
1767
1768         p = reserve_space(xdr, 20 + 2*28 + 20 + len + 12);
1769         *p++ = cpu_to_be32(OP_CREATE_SESSION);
1770         p = xdr_encode_hyper(p, clp->cl_clientid);
1771         *p++ = cpu_to_be32(clp->cl_seqid);                      /*Sequence id */
1772         *p++ = cpu_to_be32(args->flags);                        /*flags */
1773
1774         /* Fore Channel */
1775         *p++ = cpu_to_be32(0);                          /* header padding size */
1776         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1777         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1778         *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1779         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1780         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1781         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1782
1783         /* Back Channel */
1784         *p++ = cpu_to_be32(0);                          /* header padding size */
1785         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1786         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1787         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1788         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1789         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1790         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1791
1792         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1793         *p++ = cpu_to_be32(1);
1794         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1795
1796         /* authsys_parms rfc1831 */
1797         *p++ = cpu_to_be32((u32)clp->cl_boot_time.tv_nsec);     /* stamp */
1798         p = xdr_encode_opaque(p, machine_name, len);
1799         *p++ = cpu_to_be32(0);                          /* UID */
1800         *p++ = cpu_to_be32(0);                          /* GID */
1801         *p = cpu_to_be32(0);                            /* No more gids */
1802         hdr->nops++;
1803         hdr->replen += decode_create_session_maxsz;
1804 }
1805
1806 static void encode_destroy_session(struct xdr_stream *xdr,
1807                                    struct nfs4_session *session,
1808                                    struct compound_hdr *hdr)
1809 {
1810         __be32 *p;
1811         p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN);
1812         *p++ = cpu_to_be32(OP_DESTROY_SESSION);
1813         xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1814         hdr->nops++;
1815         hdr->replen += decode_destroy_session_maxsz;
1816 }
1817
1818 static void encode_reclaim_complete(struct xdr_stream *xdr,
1819                                     struct nfs41_reclaim_complete_args *args,
1820                                     struct compound_hdr *hdr)
1821 {
1822         __be32 *p;
1823
1824         p = reserve_space(xdr, 8);
1825         *p++ = cpu_to_be32(OP_RECLAIM_COMPLETE);
1826         *p++ = cpu_to_be32(args->one_fs);
1827         hdr->nops++;
1828         hdr->replen += decode_reclaim_complete_maxsz;
1829 }
1830 #endif /* CONFIG_NFS_V4_1 */
1831
1832 static void encode_sequence(struct xdr_stream *xdr,
1833                             const struct nfs4_sequence_args *args,
1834                             struct compound_hdr *hdr)
1835 {
1836 #if defined(CONFIG_NFS_V4_1)
1837         struct nfs4_session *session = args->sa_session;
1838         struct nfs4_slot_table *tp;
1839         struct nfs4_slot *slot;
1840         __be32 *p;
1841
1842         if (!session)
1843                 return;
1844
1845         tp = &session->fc_slot_table;
1846
1847         WARN_ON(args->sa_slotid == NFS4_MAX_SLOT_TABLE);
1848         slot = tp->slots + args->sa_slotid;
1849
1850         p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN + 16);
1851         *p++ = cpu_to_be32(OP_SEQUENCE);
1852
1853         /*
1854          * Sessionid + seqid + slotid + max slotid + cache_this
1855          */
1856         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1857                 "max_slotid=%d cache_this=%d\n",
1858                 __func__,
1859                 ((u32 *)session->sess_id.data)[0],
1860                 ((u32 *)session->sess_id.data)[1],
1861                 ((u32 *)session->sess_id.data)[2],
1862                 ((u32 *)session->sess_id.data)[3],
1863                 slot->seq_nr, args->sa_slotid,
1864                 tp->highest_used_slotid, args->sa_cache_this);
1865         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1866         *p++ = cpu_to_be32(slot->seq_nr);
1867         *p++ = cpu_to_be32(args->sa_slotid);
1868         *p++ = cpu_to_be32(tp->highest_used_slotid);
1869         *p = cpu_to_be32(args->sa_cache_this);
1870         hdr->nops++;
1871         hdr->replen += decode_sequence_maxsz;
1872 #endif /* CONFIG_NFS_V4_1 */
1873 }
1874
1875 #ifdef CONFIG_NFS_V4_1
1876 static void
1877 encode_getdevicelist(struct xdr_stream *xdr,
1878                      const struct nfs4_getdevicelist_args *args,
1879                      struct compound_hdr *hdr)
1880 {
1881         __be32 *p;
1882         nfs4_verifier dummy = {
1883                 .data = "dummmmmy",
1884         };
1885
1886         p = reserve_space(xdr, 20);
1887         *p++ = cpu_to_be32(OP_GETDEVICELIST);
1888         *p++ = cpu_to_be32(args->layoutclass);
1889         *p++ = cpu_to_be32(NFS4_PNFS_GETDEVLIST_MAXNUM);
1890         xdr_encode_hyper(p, 0ULL);                          /* cookie */
1891         encode_nfs4_verifier(xdr, &dummy);
1892         hdr->nops++;
1893         hdr->replen += decode_getdevicelist_maxsz;
1894 }
1895
1896 static void
1897 encode_getdeviceinfo(struct xdr_stream *xdr,
1898                      const struct nfs4_getdeviceinfo_args *args,
1899                      struct compound_hdr *hdr)
1900 {
1901         __be32 *p;
1902
1903         p = reserve_space(xdr, 16 + NFS4_DEVICEID4_SIZE);
1904         *p++ = cpu_to_be32(OP_GETDEVICEINFO);
1905         p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1906                                     NFS4_DEVICEID4_SIZE);
1907         *p++ = cpu_to_be32(args->pdev->layout_type);
1908         *p++ = cpu_to_be32(args->pdev->pglen);          /* gdia_maxcount */
1909         *p++ = cpu_to_be32(0);                          /* bitmap length 0 */
1910         hdr->nops++;
1911         hdr->replen += decode_getdeviceinfo_maxsz;
1912 }
1913
1914 static void
1915 encode_layoutget(struct xdr_stream *xdr,
1916                       const struct nfs4_layoutget_args *args,
1917                       struct compound_hdr *hdr)
1918 {
1919         __be32 *p;
1920
1921         p = reserve_space(xdr, 40);
1922         *p++ = cpu_to_be32(OP_LAYOUTGET);
1923         *p++ = cpu_to_be32(0);     /* Signal layout available */
1924         *p++ = cpu_to_be32(args->type);
1925         *p++ = cpu_to_be32(args->range.iomode);
1926         p = xdr_encode_hyper(p, args->range.offset);
1927         p = xdr_encode_hyper(p, args->range.length);
1928         p = xdr_encode_hyper(p, args->minlength);
1929         encode_nfs4_stateid(xdr, &args->stateid);
1930         p = reserve_space(xdr, 4);
1931         *p = cpu_to_be32(args->maxcount);
1932
1933         dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1934                 __func__,
1935                 args->type,
1936                 args->range.iomode,
1937                 (unsigned long)args->range.offset,
1938                 (unsigned long)args->range.length,
1939                 args->maxcount);
1940         hdr->nops++;
1941         hdr->replen += decode_layoutget_maxsz;
1942 }
1943
1944 static int
1945 encode_layoutcommit(struct xdr_stream *xdr,
1946                     struct inode *inode,
1947                     const struct nfs4_layoutcommit_args *args,
1948                     struct compound_hdr *hdr)
1949 {
1950         __be32 *p;
1951
1952         dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1953                 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1954
1955         p = reserve_space(xdr, 24);
1956         *p++ = cpu_to_be32(OP_LAYOUTCOMMIT);
1957         /* Only whole file layouts */
1958         p = xdr_encode_hyper(p, 0); /* offset */
1959         p = xdr_encode_hyper(p, args->lastbytewritten + 1);     /* length */
1960         *p = cpu_to_be32(0); /* reclaim */
1961         encode_nfs4_stateid(xdr, &args->stateid);
1962         p = reserve_space(xdr, 20);
1963         *p++ = cpu_to_be32(1); /* newoffset = TRUE */
1964         p = xdr_encode_hyper(p, args->lastbytewritten);
1965         *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
1966         *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
1967
1968         if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit)
1969                 NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
1970                         NFS_I(inode)->layout, xdr, args);
1971         else {
1972                 p = reserve_space(xdr, 4);
1973                 *p = cpu_to_be32(0); /* no layout-type payload */
1974         }
1975
1976         hdr->nops++;
1977         hdr->replen += decode_layoutcommit_maxsz;
1978         return 0;
1979 }
1980
1981 static void
1982 encode_layoutreturn(struct xdr_stream *xdr,
1983                     const struct nfs4_layoutreturn_args *args,
1984                     struct compound_hdr *hdr)
1985 {
1986         __be32 *p;
1987
1988         p = reserve_space(xdr, 20);
1989         *p++ = cpu_to_be32(OP_LAYOUTRETURN);
1990         *p++ = cpu_to_be32(0);          /* reclaim. always 0 for now */
1991         *p++ = cpu_to_be32(args->layout_type);
1992         *p++ = cpu_to_be32(IOMODE_ANY);
1993         *p = cpu_to_be32(RETURN_FILE);
1994         p = reserve_space(xdr, 16);
1995         p = xdr_encode_hyper(p, 0);
1996         p = xdr_encode_hyper(p, NFS4_MAX_UINT64);
1997         spin_lock(&args->inode->i_lock);
1998         encode_nfs4_stateid(xdr, &args->stateid);
1999         spin_unlock(&args->inode->i_lock);
2000         if (NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn) {
2001                 NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn(
2002                         NFS_I(args->inode)->layout, xdr, args);
2003         } else {
2004                 p = reserve_space(xdr, 4);
2005                 *p = cpu_to_be32(0);
2006         }
2007         hdr->nops++;
2008         hdr->replen += decode_layoutreturn_maxsz;
2009 }
2010
2011 static int
2012 encode_secinfo_no_name(struct xdr_stream *xdr,
2013                        const struct nfs41_secinfo_no_name_args *args,
2014                        struct compound_hdr *hdr)
2015 {
2016         __be32 *p;
2017         p = reserve_space(xdr, 8);
2018         *p++ = cpu_to_be32(OP_SECINFO_NO_NAME);
2019         *p++ = cpu_to_be32(args->style);
2020         hdr->nops++;
2021         hdr->replen += decode_secinfo_no_name_maxsz;
2022         return 0;
2023 }
2024
2025 static void encode_test_stateid(struct xdr_stream *xdr,
2026                                 struct nfs41_test_stateid_args *args,
2027                                 struct compound_hdr *hdr)
2028 {
2029         __be32 *p;
2030
2031         p = reserve_space(xdr, 8);
2032         *p++ = cpu_to_be32(OP_TEST_STATEID);
2033         *p = cpu_to_be32(1);
2034         encode_nfs4_stateid(xdr, args->stateid);
2035         hdr->nops++;
2036         hdr->replen += decode_test_stateid_maxsz;
2037 }
2038
2039 static void encode_free_stateid(struct xdr_stream *xdr,
2040                                 struct nfs41_free_stateid_args *args,
2041                                 struct compound_hdr *hdr)
2042 {
2043         encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2044         encode_nfs4_stateid(xdr, args->stateid);
2045 }
2046 #endif /* CONFIG_NFS_V4_1 */
2047
2048 /*
2049  * END OF "GENERIC" ENCODE ROUTINES.
2050  */
2051
2052 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2053 {
2054 #if defined(CONFIG_NFS_V4_1)
2055         if (args->sa_session)
2056                 return args->sa_session->clp->cl_mvops->minor_version;
2057 #endif /* CONFIG_NFS_V4_1 */
2058         return 0;
2059 }
2060
2061 /*
2062  * Encode an ACCESS request
2063  */
2064 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2065                                 const struct nfs4_accessargs *args)
2066 {
2067         struct compound_hdr hdr = {
2068                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2069         };
2070
2071         encode_compound_hdr(xdr, req, &hdr);
2072         encode_sequence(xdr, &args->seq_args, &hdr);
2073         encode_putfh(xdr, args->fh, &hdr);
2074         encode_access(xdr, args->access, &hdr);
2075         encode_getfattr(xdr, args->bitmask, &hdr);
2076         encode_nops(&hdr);
2077 }
2078
2079 /*
2080  * Encode LOOKUP request
2081  */
2082 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2083                                 const struct nfs4_lookup_arg *args)
2084 {
2085         struct compound_hdr hdr = {
2086                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2087         };
2088
2089         encode_compound_hdr(xdr, req, &hdr);
2090         encode_sequence(xdr, &args->seq_args, &hdr);
2091         encode_putfh(xdr, args->dir_fh, &hdr);
2092         encode_lookup(xdr, args->name, &hdr);
2093         encode_getfh(xdr, &hdr);
2094         encode_getfattr(xdr, args->bitmask, &hdr);
2095         encode_nops(&hdr);
2096 }
2097
2098 /*
2099  * Encode LOOKUP_ROOT request
2100  */
2101 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2102                                      struct xdr_stream *xdr,
2103                                      const struct nfs4_lookup_root_arg *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_putrootfh(xdr, &hdr);
2112         encode_getfh(xdr, &hdr);
2113         encode_getfattr(xdr, args->bitmask, &hdr);
2114         encode_nops(&hdr);
2115 }
2116
2117 /*
2118  * Encode REMOVE request
2119  */
2120 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2121                                 const struct nfs_removeargs *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->fh, &hdr);
2130         encode_remove(xdr, &args->name, &hdr);
2131         encode_getfattr(xdr, args->bitmask, &hdr);
2132         encode_nops(&hdr);
2133 }
2134
2135 /*
2136  * Encode RENAME request
2137  */
2138 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2139                                 const struct nfs_renameargs *args)
2140 {
2141         struct compound_hdr hdr = {
2142                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2143         };
2144
2145         encode_compound_hdr(xdr, req, &hdr);
2146         encode_sequence(xdr, &args->seq_args, &hdr);
2147         encode_putfh(xdr, args->old_dir, &hdr);
2148         encode_savefh(xdr, &hdr);
2149         encode_putfh(xdr, args->new_dir, &hdr);
2150         encode_rename(xdr, args->old_name, args->new_name, &hdr);
2151         encode_getfattr(xdr, args->bitmask, &hdr);
2152         encode_restorefh(xdr, &hdr);
2153         encode_getfattr(xdr, args->bitmask, &hdr);
2154         encode_nops(&hdr);
2155 }
2156
2157 /*
2158  * Encode LINK request
2159  */
2160 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2161                              const struct nfs4_link_arg *args)
2162 {
2163         struct compound_hdr hdr = {
2164                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2165         };
2166
2167         encode_compound_hdr(xdr, req, &hdr);
2168         encode_sequence(xdr, &args->seq_args, &hdr);
2169         encode_putfh(xdr, args->fh, &hdr);
2170         encode_savefh(xdr, &hdr);
2171         encode_putfh(xdr, args->dir_fh, &hdr);
2172         encode_link(xdr, args->name, &hdr);
2173         encode_getfattr(xdr, args->bitmask, &hdr);
2174         encode_restorefh(xdr, &hdr);
2175         encode_getfattr(xdr, args->bitmask, &hdr);
2176         encode_nops(&hdr);
2177 }
2178
2179 /*
2180  * Encode CREATE request
2181  */
2182 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2183                                 const struct nfs4_create_arg *args)
2184 {
2185         struct compound_hdr hdr = {
2186                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2187         };
2188
2189         encode_compound_hdr(xdr, req, &hdr);
2190         encode_sequence(xdr, &args->seq_args, &hdr);
2191         encode_putfh(xdr, args->dir_fh, &hdr);
2192         encode_savefh(xdr, &hdr);
2193         encode_create(xdr, args, &hdr);
2194         encode_getfh(xdr, &hdr);
2195         encode_getfattr(xdr, args->bitmask, &hdr);
2196         encode_restorefh(xdr, &hdr);
2197         encode_getfattr(xdr, args->bitmask, &hdr);
2198         encode_nops(&hdr);
2199 }
2200
2201 /*
2202  * Encode SYMLINK request
2203  */
2204 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2205                                  const struct nfs4_create_arg *args)
2206 {
2207         nfs4_xdr_enc_create(req, xdr, args);
2208 }
2209
2210 /*
2211  * Encode GETATTR request
2212  */
2213 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2214                                  const struct nfs4_getattr_arg *args)
2215 {
2216         struct compound_hdr hdr = {
2217                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2218         };
2219
2220         encode_compound_hdr(xdr, req, &hdr);
2221         encode_sequence(xdr, &args->seq_args, &hdr);
2222         encode_putfh(xdr, args->fh, &hdr);
2223         encode_getfattr(xdr, args->bitmask, &hdr);
2224         encode_nops(&hdr);
2225 }
2226
2227 /*
2228  * Encode a CLOSE request
2229  */
2230 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2231                                struct nfs_closeargs *args)
2232 {
2233         struct compound_hdr hdr = {
2234                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2235         };
2236
2237         encode_compound_hdr(xdr, req, &hdr);
2238         encode_sequence(xdr, &args->seq_args, &hdr);
2239         encode_putfh(xdr, args->fh, &hdr);
2240         encode_close(xdr, args, &hdr);
2241         encode_getfattr(xdr, args->bitmask, &hdr);
2242         encode_nops(&hdr);
2243 }
2244
2245 /*
2246  * Encode an OPEN request
2247  */
2248 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2249                               struct nfs_openargs *args)
2250 {
2251         struct compound_hdr hdr = {
2252                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2253         };
2254
2255         encode_compound_hdr(xdr, req, &hdr);
2256         encode_sequence(xdr, &args->seq_args, &hdr);
2257         encode_putfh(xdr, args->fh, &hdr);
2258         encode_savefh(xdr, &hdr);
2259         encode_open(xdr, args, &hdr);
2260         encode_getfh(xdr, &hdr);
2261         encode_getfattr(xdr, args->bitmask, &hdr);
2262         encode_restorefh(xdr, &hdr);
2263         encode_getfattr(xdr, args->dir_bitmask, &hdr);
2264         encode_nops(&hdr);
2265 }
2266
2267 /*
2268  * Encode an OPEN_CONFIRM request
2269  */
2270 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2271                                       struct xdr_stream *xdr,
2272                                       struct nfs_open_confirmargs *args)
2273 {
2274         struct compound_hdr hdr = {
2275                 .nops   = 0,
2276         };
2277
2278         encode_compound_hdr(xdr, req, &hdr);
2279         encode_putfh(xdr, args->fh, &hdr);
2280         encode_open_confirm(xdr, args, &hdr);
2281         encode_nops(&hdr);
2282 }
2283
2284 /*
2285  * Encode an OPEN request with no attributes.
2286  */
2287 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2288                                      struct xdr_stream *xdr,
2289                                      struct nfs_openargs *args)
2290 {
2291         struct compound_hdr hdr = {
2292                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2293         };
2294
2295         encode_compound_hdr(xdr, req, &hdr);
2296         encode_sequence(xdr, &args->seq_args, &hdr);
2297         encode_putfh(xdr, args->fh, &hdr);
2298         encode_open(xdr, args, &hdr);
2299         encode_getfattr(xdr, args->bitmask, &hdr);
2300         encode_nops(&hdr);
2301 }
2302
2303 /*
2304  * Encode an OPEN_DOWNGRADE request
2305  */
2306 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2307                                         struct xdr_stream *xdr,
2308                                         struct nfs_closeargs *args)
2309 {
2310         struct compound_hdr hdr = {
2311                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2312         };
2313
2314         encode_compound_hdr(xdr, req, &hdr);
2315         encode_sequence(xdr, &args->seq_args, &hdr);
2316         encode_putfh(xdr, args->fh, &hdr);
2317         encode_open_downgrade(xdr, args, &hdr);
2318         encode_getfattr(xdr, args->bitmask, &hdr);
2319         encode_nops(&hdr);
2320 }
2321
2322 /*
2323  * Encode a LOCK request
2324  */
2325 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2326                               struct nfs_lock_args *args)
2327 {
2328         struct compound_hdr hdr = {
2329                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2330         };
2331
2332         encode_compound_hdr(xdr, req, &hdr);
2333         encode_sequence(xdr, &args->seq_args, &hdr);
2334         encode_putfh(xdr, args->fh, &hdr);
2335         encode_lock(xdr, args, &hdr);
2336         encode_nops(&hdr);
2337 }
2338
2339 /*
2340  * Encode a LOCKT request
2341  */
2342 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2343                                struct nfs_lockt_args *args)
2344 {
2345         struct compound_hdr hdr = {
2346                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2347         };
2348
2349         encode_compound_hdr(xdr, req, &hdr);
2350         encode_sequence(xdr, &args->seq_args, &hdr);
2351         encode_putfh(xdr, args->fh, &hdr);
2352         encode_lockt(xdr, args, &hdr);
2353         encode_nops(&hdr);
2354 }
2355
2356 /*
2357  * Encode a LOCKU request
2358  */
2359 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2360                                struct nfs_locku_args *args)
2361 {
2362         struct compound_hdr hdr = {
2363                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2364         };
2365
2366         encode_compound_hdr(xdr, req, &hdr);
2367         encode_sequence(xdr, &args->seq_args, &hdr);
2368         encode_putfh(xdr, args->fh, &hdr);
2369         encode_locku(xdr, args, &hdr);
2370         encode_nops(&hdr);
2371 }
2372
2373 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2374                                            struct xdr_stream *xdr,
2375                                         struct nfs_release_lockowner_args *args)
2376 {
2377         struct compound_hdr hdr = {
2378                 .minorversion = 0,
2379         };
2380
2381         encode_compound_hdr(xdr, req, &hdr);
2382         encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2383         encode_nops(&hdr);
2384 }
2385
2386 /*
2387  * Encode a READLINK request
2388  */
2389 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2390                                   const struct nfs4_readlink *args)
2391 {
2392         struct compound_hdr hdr = {
2393                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2394         };
2395
2396         encode_compound_hdr(xdr, req, &hdr);
2397         encode_sequence(xdr, &args->seq_args, &hdr);
2398         encode_putfh(xdr, args->fh, &hdr);
2399         encode_readlink(xdr, args, req, &hdr);
2400
2401         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2402                         args->pgbase, args->pglen);
2403         encode_nops(&hdr);
2404 }
2405
2406 /*
2407  * Encode a READDIR request
2408  */
2409 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2410                                  const struct nfs4_readdir_arg *args)
2411 {
2412         struct compound_hdr hdr = {
2413                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2414         };
2415
2416         encode_compound_hdr(xdr, req, &hdr);
2417         encode_sequence(xdr, &args->seq_args, &hdr);
2418         encode_putfh(xdr, args->fh, &hdr);
2419         encode_readdir(xdr, args, req, &hdr);
2420
2421         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2422                          args->pgbase, args->count);
2423         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2424                         __func__, hdr.replen << 2, args->pages,
2425                         args->pgbase, args->count);
2426         encode_nops(&hdr);
2427 }
2428
2429 /*
2430  * Encode a READ request
2431  */
2432 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2433                               struct nfs_readargs *args)
2434 {
2435         struct compound_hdr hdr = {
2436                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2437         };
2438
2439         encode_compound_hdr(xdr, req, &hdr);
2440         encode_sequence(xdr, &args->seq_args, &hdr);
2441         encode_putfh(xdr, args->fh, &hdr);
2442         encode_read(xdr, args, &hdr);
2443
2444         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2445                          args->pages, args->pgbase, args->count);
2446         req->rq_rcv_buf.flags |= XDRBUF_READ;
2447         encode_nops(&hdr);
2448 }
2449
2450 /*
2451  * Encode an SETATTR request
2452  */
2453 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2454                                  struct nfs_setattrargs *args)
2455 {
2456         struct compound_hdr hdr = {
2457                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2458         };
2459
2460         encode_compound_hdr(xdr, req, &hdr);
2461         encode_sequence(xdr, &args->seq_args, &hdr);
2462         encode_putfh(xdr, args->fh, &hdr);
2463         encode_setattr(xdr, args, args->server, &hdr);
2464         encode_getfattr(xdr, args->bitmask, &hdr);
2465         encode_nops(&hdr);
2466 }
2467
2468 /*
2469  * Encode a GETACL request
2470  */
2471 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2472                                 struct nfs_getaclargs *args)
2473 {
2474         struct compound_hdr hdr = {
2475                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2476         };
2477         uint32_t replen;
2478
2479         encode_compound_hdr(xdr, req, &hdr);
2480         encode_sequence(xdr, &args->seq_args, &hdr);
2481         encode_putfh(xdr, args->fh, &hdr);
2482         replen = hdr.replen + op_decode_hdr_maxsz + 1;
2483         encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2484
2485         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2486                 args->acl_pages, args->acl_pgbase, args->acl_len);
2487
2488         encode_nops(&hdr);
2489 }
2490
2491 /*
2492  * Encode a WRITE request
2493  */
2494 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2495                                struct nfs_writeargs *args)
2496 {
2497         struct compound_hdr hdr = {
2498                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2499         };
2500
2501         encode_compound_hdr(xdr, req, &hdr);
2502         encode_sequence(xdr, &args->seq_args, &hdr);
2503         encode_putfh(xdr, args->fh, &hdr);
2504         encode_write(xdr, args, &hdr);
2505         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2506         if (args->bitmask)
2507                 encode_getfattr(xdr, args->bitmask, &hdr);
2508         encode_nops(&hdr);
2509 }
2510
2511 /*
2512  *  a COMMIT request
2513  */
2514 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2515                                 struct nfs_writeargs *args)
2516 {
2517         struct compound_hdr hdr = {
2518                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2519         };
2520
2521         encode_compound_hdr(xdr, req, &hdr);
2522         encode_sequence(xdr, &args->seq_args, &hdr);
2523         encode_putfh(xdr, args->fh, &hdr);
2524         encode_commit(xdr, args, &hdr);
2525         if (args->bitmask)
2526                 encode_getfattr(xdr, args->bitmask, &hdr);
2527         encode_nops(&hdr);
2528 }
2529
2530 /*
2531  * FSINFO request
2532  */
2533 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2534                                 struct nfs4_fsinfo_arg *args)
2535 {
2536         struct compound_hdr hdr = {
2537                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2538         };
2539
2540         encode_compound_hdr(xdr, req, &hdr);
2541         encode_sequence(xdr, &args->seq_args, &hdr);
2542         encode_putfh(xdr, args->fh, &hdr);
2543         encode_fsinfo(xdr, args->bitmask, &hdr);
2544         encode_nops(&hdr);
2545 }
2546
2547 /*
2548  * a PATHCONF request
2549  */
2550 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2551                                   const struct nfs4_pathconf_arg *args)
2552 {
2553         struct compound_hdr hdr = {
2554                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2555         };
2556
2557         encode_compound_hdr(xdr, req, &hdr);
2558         encode_sequence(xdr, &args->seq_args, &hdr);
2559         encode_putfh(xdr, args->fh, &hdr);
2560         encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2561                            &hdr);
2562         encode_nops(&hdr);
2563 }
2564
2565 /*
2566  * a STATFS request
2567  */
2568 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2569                                 const struct nfs4_statfs_arg *args)
2570 {
2571         struct compound_hdr hdr = {
2572                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2573         };
2574
2575         encode_compound_hdr(xdr, req, &hdr);
2576         encode_sequence(xdr, &args->seq_args, &hdr);
2577         encode_putfh(xdr, args->fh, &hdr);
2578         encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2579                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2580         encode_nops(&hdr);
2581 }
2582
2583 /*
2584  * GETATTR_BITMAP request
2585  */
2586 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2587                                      struct xdr_stream *xdr,
2588                                      struct nfs4_server_caps_arg *args)
2589 {
2590         struct compound_hdr hdr = {
2591                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2592         };
2593
2594         encode_compound_hdr(xdr, req, &hdr);
2595         encode_sequence(xdr, &args->seq_args, &hdr);
2596         encode_putfh(xdr, args->fhandle, &hdr);
2597         encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2598                            FATTR4_WORD0_FH_EXPIRE_TYPE|
2599                            FATTR4_WORD0_LINK_SUPPORT|
2600                            FATTR4_WORD0_SYMLINK_SUPPORT|
2601                            FATTR4_WORD0_ACLSUPPORT, &hdr);
2602         encode_nops(&hdr);
2603 }
2604
2605 /*
2606  * a RENEW request
2607  */
2608 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2609                                struct nfs_client *clp)
2610 {
2611         struct compound_hdr hdr = {
2612                 .nops   = 0,
2613         };
2614
2615         encode_compound_hdr(xdr, req, &hdr);
2616         encode_renew(xdr, clp->cl_clientid, &hdr);
2617         encode_nops(&hdr);
2618 }
2619
2620 /*
2621  * a SETCLIENTID request
2622  */
2623 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2624                                      struct xdr_stream *xdr,
2625                                      struct nfs4_setclientid *sc)
2626 {
2627         struct compound_hdr hdr = {
2628                 .nops   = 0,
2629         };
2630
2631         encode_compound_hdr(xdr, req, &hdr);
2632         encode_setclientid(xdr, sc, &hdr);
2633         encode_nops(&hdr);
2634 }
2635
2636 /*
2637  * a SETCLIENTID_CONFIRM request
2638  */
2639 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2640                                              struct xdr_stream *xdr,
2641                                              struct nfs4_setclientid_res *arg)
2642 {
2643         struct compound_hdr hdr = {
2644                 .nops   = 0,
2645         };
2646         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2647
2648         encode_compound_hdr(xdr, req, &hdr);
2649         encode_setclientid_confirm(xdr, arg, &hdr);
2650         encode_putrootfh(xdr, &hdr);
2651         encode_fsinfo(xdr, lease_bitmap, &hdr);
2652         encode_nops(&hdr);
2653 }
2654
2655 /*
2656  * DELEGRETURN request
2657  */
2658 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2659                                      struct xdr_stream *xdr,
2660                                      const struct nfs4_delegreturnargs *args)
2661 {
2662         struct compound_hdr hdr = {
2663                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2664         };
2665
2666         encode_compound_hdr(xdr, req, &hdr);
2667         encode_sequence(xdr, &args->seq_args, &hdr);
2668         encode_putfh(xdr, args->fhandle, &hdr);
2669         encode_delegreturn(xdr, args->stateid, &hdr);
2670         encode_getfattr(xdr, args->bitmask, &hdr);
2671         encode_nops(&hdr);
2672 }
2673
2674 /*
2675  * Encode FS_LOCATIONS request
2676  */
2677 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2678                                       struct xdr_stream *xdr,
2679                                       struct nfs4_fs_locations_arg *args)
2680 {
2681         struct compound_hdr hdr = {
2682                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2683         };
2684         uint32_t replen;
2685
2686         encode_compound_hdr(xdr, req, &hdr);
2687         encode_sequence(xdr, &args->seq_args, &hdr);
2688         encode_putfh(xdr, args->dir_fh, &hdr);
2689         encode_lookup(xdr, args->name, &hdr);
2690         replen = hdr.replen;    /* get the attribute into args->page */
2691         encode_fs_locations(xdr, args->bitmask, &hdr);
2692
2693         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2694                         0, PAGE_SIZE);
2695         encode_nops(&hdr);
2696 }
2697
2698 /*
2699  * Encode SECINFO request
2700  */
2701 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2702                                 struct xdr_stream *xdr,
2703                                 struct nfs4_secinfo_arg *args)
2704 {
2705         struct compound_hdr hdr = {
2706                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2707         };
2708
2709         encode_compound_hdr(xdr, req, &hdr);
2710         encode_sequence(xdr, &args->seq_args, &hdr);
2711         encode_putfh(xdr, args->dir_fh, &hdr);
2712         encode_secinfo(xdr, args->name, &hdr);
2713         encode_nops(&hdr);
2714 }
2715
2716 #if defined(CONFIG_NFS_V4_1)
2717 /*
2718  * EXCHANGE_ID request
2719  */
2720 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2721                                      struct xdr_stream *xdr,
2722                                      struct nfs41_exchange_id_args *args)
2723 {
2724         struct compound_hdr hdr = {
2725                 .minorversion = args->client->cl_mvops->minor_version,
2726         };
2727
2728         encode_compound_hdr(xdr, req, &hdr);
2729         encode_exchange_id(xdr, args, &hdr);
2730         encode_nops(&hdr);
2731 }
2732
2733 /*
2734  * a CREATE_SESSION request
2735  */
2736 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2737                                         struct xdr_stream *xdr,
2738                                         struct nfs41_create_session_args *args)
2739 {
2740         struct compound_hdr hdr = {
2741                 .minorversion = args->client->cl_mvops->minor_version,
2742         };
2743
2744         encode_compound_hdr(xdr, req, &hdr);
2745         encode_create_session(xdr, args, &hdr);
2746         encode_nops(&hdr);
2747 }
2748
2749 /*
2750  * a DESTROY_SESSION request
2751  */
2752 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2753                                          struct xdr_stream *xdr,
2754                                          struct nfs4_session *session)
2755 {
2756         struct compound_hdr hdr = {
2757                 .minorversion = session->clp->cl_mvops->minor_version,
2758         };
2759
2760         encode_compound_hdr(xdr, req, &hdr);
2761         encode_destroy_session(xdr, session, &hdr);
2762         encode_nops(&hdr);
2763 }
2764
2765 /*
2766  * a SEQUENCE request
2767  */
2768 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2769                                   struct nfs4_sequence_args *args)
2770 {
2771         struct compound_hdr hdr = {
2772                 .minorversion = nfs4_xdr_minorversion(args),
2773         };
2774
2775         encode_compound_hdr(xdr, req, &hdr);
2776         encode_sequence(xdr, args, &hdr);
2777         encode_nops(&hdr);
2778 }
2779
2780 /*
2781  * a GET_LEASE_TIME request
2782  */
2783 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2784                                         struct xdr_stream *xdr,
2785                                         struct nfs4_get_lease_time_args *args)
2786 {
2787         struct compound_hdr hdr = {
2788                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2789         };
2790         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2791
2792         encode_compound_hdr(xdr, req, &hdr);
2793         encode_sequence(xdr, &args->la_seq_args, &hdr);
2794         encode_putrootfh(xdr, &hdr);
2795         encode_fsinfo(xdr, lease_bitmap, &hdr);
2796         encode_nops(&hdr);
2797 }
2798
2799 /*
2800  * a RECLAIM_COMPLETE request
2801  */
2802 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2803                                           struct xdr_stream *xdr,
2804                                 struct nfs41_reclaim_complete_args *args)
2805 {
2806         struct compound_hdr hdr = {
2807                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2808         };
2809
2810         encode_compound_hdr(xdr, req, &hdr);
2811         encode_sequence(xdr, &args->seq_args, &hdr);
2812         encode_reclaim_complete(xdr, args, &hdr);
2813         encode_nops(&hdr);
2814 }
2815
2816 /*
2817  * Encode GETDEVICELIST request
2818  */
2819 static void nfs4_xdr_enc_getdevicelist(struct rpc_rqst *req,
2820                                        struct xdr_stream *xdr,
2821                                        struct nfs4_getdevicelist_args *args)
2822 {
2823         struct compound_hdr hdr = {
2824                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2825         };
2826
2827         encode_compound_hdr(xdr, req, &hdr);
2828         encode_sequence(xdr, &args->seq_args, &hdr);
2829         encode_putfh(xdr, args->fh, &hdr);
2830         encode_getdevicelist(xdr, args, &hdr);
2831         encode_nops(&hdr);
2832 }
2833
2834 /*
2835  * Encode GETDEVICEINFO request
2836  */
2837 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2838                                        struct xdr_stream *xdr,
2839                                        struct nfs4_getdeviceinfo_args *args)
2840 {
2841         struct compound_hdr hdr = {
2842                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2843         };
2844
2845         encode_compound_hdr(xdr, req, &hdr);
2846         encode_sequence(xdr, &args->seq_args, &hdr);
2847         encode_getdeviceinfo(xdr, args, &hdr);
2848
2849         /* set up reply kvec. Subtract notification bitmap max size (2)
2850          * so that notification bitmap is put in xdr_buf tail */
2851         xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2852                          args->pdev->pages, args->pdev->pgbase,
2853                          args->pdev->pglen);
2854
2855         encode_nops(&hdr);
2856 }
2857
2858 /*
2859  *  Encode LAYOUTGET request
2860  */
2861 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2862                                    struct xdr_stream *xdr,
2863                                    struct nfs4_layoutget_args *args)
2864 {
2865         struct compound_hdr hdr = {
2866                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2867         };
2868
2869         encode_compound_hdr(xdr, req, &hdr);
2870         encode_sequence(xdr, &args->seq_args, &hdr);
2871         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2872         encode_layoutget(xdr, args, &hdr);
2873
2874         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2875             args->layout.pages, 0, args->layout.pglen);
2876
2877         encode_nops(&hdr);
2878 }
2879
2880 /*
2881  *  Encode LAYOUTCOMMIT request
2882  */
2883 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2884                                       struct xdr_stream *xdr,
2885                                       struct nfs4_layoutcommit_args *args)
2886 {
2887         struct nfs4_layoutcommit_data *data =
2888                 container_of(args, struct nfs4_layoutcommit_data, args);
2889         struct compound_hdr hdr = {
2890                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2891         };
2892
2893         encode_compound_hdr(xdr, req, &hdr);
2894         encode_sequence(xdr, &args->seq_args, &hdr);
2895         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2896         encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2897         encode_getfattr(xdr, args->bitmask, &hdr);
2898         encode_nops(&hdr);
2899 }
2900
2901 /*
2902  * Encode LAYOUTRETURN request
2903  */
2904 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2905                                       struct xdr_stream *xdr,
2906                                       struct nfs4_layoutreturn_args *args)
2907 {
2908         struct compound_hdr hdr = {
2909                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2910         };
2911
2912         encode_compound_hdr(xdr, req, &hdr);
2913         encode_sequence(xdr, &args->seq_args, &hdr);
2914         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2915         encode_layoutreturn(xdr, args, &hdr);
2916         encode_nops(&hdr);
2917 }
2918
2919 /*
2920  * Encode SECINFO_NO_NAME request
2921  */
2922 static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
2923                                         struct xdr_stream *xdr,
2924                                         struct nfs41_secinfo_no_name_args *args)
2925 {
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_putrootfh(xdr, &hdr);
2933         encode_secinfo_no_name(xdr, args, &hdr);
2934         encode_nops(&hdr);
2935         return 0;
2936 }
2937
2938 /*
2939  *  Encode TEST_STATEID request
2940  */
2941 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
2942                                       struct xdr_stream *xdr,
2943                                       struct nfs41_test_stateid_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_test_stateid(xdr, args, &hdr);
2952         encode_nops(&hdr);
2953 }
2954
2955 /*
2956  *  Encode FREE_STATEID request
2957  */
2958 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
2959                                      struct xdr_stream *xdr,
2960                                      struct nfs41_free_stateid_args *args)
2961 {
2962         struct compound_hdr hdr = {
2963                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2964         };
2965
2966         encode_compound_hdr(xdr, req, &hdr);
2967         encode_sequence(xdr, &args->seq_args, &hdr);
2968         encode_free_stateid(xdr, args, &hdr);
2969         encode_nops(&hdr);
2970 }
2971 #endif /* CONFIG_NFS_V4_1 */
2972
2973 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
2974 {
2975         dprintk("nfs: %s: prematurely hit end of receive buffer. "
2976                 "Remaining buffer length is %tu words.\n",
2977                 func, xdr->end - xdr->p);
2978 }
2979
2980 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2981 {
2982         __be32 *p;
2983
2984         p = xdr_inline_decode(xdr, 4);
2985         if (unlikely(!p))
2986                 goto out_overflow;
2987         *len = be32_to_cpup(p);
2988         p = xdr_inline_decode(xdr, *len);
2989         if (unlikely(!p))
2990                 goto out_overflow;
2991         *string = (char *)p;
2992         return 0;
2993 out_overflow:
2994         print_overflow_msg(__func__, xdr);
2995         return -EIO;
2996 }
2997
2998 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2999 {
3000         __be32 *p;
3001
3002         p = xdr_inline_decode(xdr, 8);
3003         if (unlikely(!p))
3004                 goto out_overflow;
3005         hdr->status = be32_to_cpup(p++);
3006         hdr->taglen = be32_to_cpup(p);
3007
3008         p = xdr_inline_decode(xdr, hdr->taglen + 4);
3009         if (unlikely(!p))
3010                 goto out_overflow;
3011         hdr->tag = (char *)p;
3012         p += XDR_QUADLEN(hdr->taglen);
3013         hdr->nops = be32_to_cpup(p);
3014         if (unlikely(hdr->nops < 1))
3015                 return nfs4_stat_to_errno(hdr->status);
3016         return 0;
3017 out_overflow:
3018         print_overflow_msg(__func__, xdr);
3019         return -EIO;
3020 }
3021
3022 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3023 {
3024         __be32 *p;
3025         uint32_t opnum;
3026         int32_t nfserr;
3027
3028         p = xdr_inline_decode(xdr, 8);
3029         if (unlikely(!p))
3030                 goto out_overflow;
3031         opnum = be32_to_cpup(p++);
3032         if (opnum != expected) {
3033                 dprintk("nfs: Server returned operation"
3034                         " %d but we issued a request for %d\n",
3035                                 opnum, expected);
3036                 return -EIO;
3037         }
3038         nfserr = be32_to_cpup(p);
3039         if (nfserr != NFS_OK)
3040                 return nfs4_stat_to_errno(nfserr);
3041         return 0;
3042 out_overflow:
3043         print_overflow_msg(__func__, xdr);
3044         return -EIO;
3045 }
3046
3047 /* Dummy routine */
3048 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
3049 {
3050         __be32 *p;
3051         unsigned int strlen;
3052         char *str;
3053
3054         p = xdr_inline_decode(xdr, 12);
3055         if (likely(p))
3056                 return decode_opaque_inline(xdr, &strlen, &str);
3057         print_overflow_msg(__func__, xdr);
3058         return -EIO;
3059 }
3060
3061 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3062 {
3063         uint32_t bmlen;
3064         __be32 *p;
3065
3066         p = xdr_inline_decode(xdr, 4);
3067         if (unlikely(!p))
3068                 goto out_overflow;
3069         bmlen = be32_to_cpup(p);
3070
3071         bitmap[0] = bitmap[1] = bitmap[2] = 0;
3072         p = xdr_inline_decode(xdr, (bmlen << 2));
3073         if (unlikely(!p))
3074                 goto out_overflow;
3075         if (bmlen > 0) {
3076                 bitmap[0] = be32_to_cpup(p++);
3077                 if (bmlen > 1) {
3078                         bitmap[1] = be32_to_cpup(p++);
3079                         if (bmlen > 2)
3080                                 bitmap[2] = be32_to_cpup(p);
3081                 }
3082         }
3083         return 0;
3084 out_overflow:
3085         print_overflow_msg(__func__, xdr);
3086         return -EIO;
3087 }
3088
3089 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
3090 {
3091         __be32 *p;
3092
3093         p = xdr_inline_decode(xdr, 4);
3094         if (unlikely(!p))
3095                 goto out_overflow;
3096         *attrlen = be32_to_cpup(p);
3097         *savep = xdr->p;
3098         return 0;
3099 out_overflow:
3100         print_overflow_msg(__func__, xdr);
3101         return -EIO;
3102 }
3103
3104 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3105 {
3106         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3107                 int ret;
3108                 ret = decode_attr_bitmap(xdr, bitmask);
3109                 if (unlikely(ret < 0))
3110                         return ret;
3111                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3112         } else
3113                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3114         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3115                 bitmask[0], bitmask[1], bitmask[2]);
3116         return 0;
3117 }
3118
3119 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3120 {
3121         __be32 *p;
3122         int ret = 0;
3123
3124         *type = 0;
3125         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3126                 return -EIO;
3127         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3128                 p = xdr_inline_decode(xdr, 4);
3129                 if (unlikely(!p))
3130                         goto out_overflow;
3131                 *type = be32_to_cpup(p);
3132                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3133                         dprintk("%s: bad type %d\n", __func__, *type);
3134                         return -EIO;
3135                 }
3136                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3137                 ret = NFS_ATTR_FATTR_TYPE;
3138         }
3139         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3140         return ret;
3141 out_overflow:
3142         print_overflow_msg(__func__, xdr);
3143         return -EIO;
3144 }
3145
3146 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3147                                       uint32_t *bitmap, uint32_t *type)
3148 {
3149         __be32 *p;
3150
3151         *type = 0;
3152         if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3153                 return -EIO;
3154         if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3155                 p = xdr_inline_decode(xdr, 4);
3156                 if (unlikely(!p))
3157                         goto out_overflow;
3158                 *type = be32_to_cpup(p);
3159                 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3160         }
3161         dprintk("%s: expire type=0x%x\n", __func__, *type);
3162         return 0;
3163 out_overflow:
3164         print_overflow_msg(__func__, xdr);
3165         return -EIO;
3166 }
3167
3168 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3169 {
3170         __be32 *p;
3171         int ret = 0;
3172
3173         *change = 0;
3174         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3175                 return -EIO;
3176         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3177                 p = xdr_inline_decode(xdr, 8);
3178                 if (unlikely(!p))
3179                         goto out_overflow;
3180                 xdr_decode_hyper(p, change);
3181                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3182                 ret = NFS_ATTR_FATTR_CHANGE;
3183         }
3184         dprintk("%s: change attribute=%Lu\n", __func__,
3185                         (unsigned long long)*change);
3186         return ret;
3187 out_overflow:
3188         print_overflow_msg(__func__, xdr);
3189         return -EIO;
3190 }
3191
3192 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3193 {
3194         __be32 *p;
3195         int ret = 0;
3196
3197         *size = 0;
3198         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3199                 return -EIO;
3200         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3201                 p = xdr_inline_decode(xdr, 8);
3202                 if (unlikely(!p))
3203                         goto out_overflow;
3204                 xdr_decode_hyper(p, size);
3205                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3206                 ret = NFS_ATTR_FATTR_SIZE;
3207         }
3208         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3209         return ret;
3210 out_overflow:
3211         print_overflow_msg(__func__, xdr);
3212         return -EIO;
3213 }
3214
3215 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3216 {
3217         __be32 *p;
3218
3219         *res = 0;
3220         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3221                 return -EIO;
3222         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3223                 p = xdr_inline_decode(xdr, 4);
3224                 if (unlikely(!p))
3225                         goto out_overflow;
3226                 *res = be32_to_cpup(p);
3227                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3228         }
3229         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3230         return 0;
3231 out_overflow:
3232         print_overflow_msg(__func__, xdr);
3233         return -EIO;
3234 }
3235
3236 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3237 {
3238         __be32 *p;
3239
3240         *res = 0;
3241         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3242                 return -EIO;
3243         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3244                 p = xdr_inline_decode(xdr, 4);
3245                 if (unlikely(!p))
3246                         goto out_overflow;
3247                 *res = be32_to_cpup(p);
3248                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3249         }
3250         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3251         return 0;
3252 out_overflow:
3253         print_overflow_msg(__func__, xdr);
3254         return -EIO;
3255 }
3256
3257 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3258 {
3259         __be32 *p;
3260         int ret = 0;
3261
3262         fsid->major = 0;
3263         fsid->minor = 0;
3264         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3265                 return -EIO;
3266         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3267                 p = xdr_inline_decode(xdr, 16);
3268                 if (unlikely(!p))
3269                         goto out_overflow;
3270                 p = xdr_decode_hyper(p, &fsid->major);
3271                 xdr_decode_hyper(p, &fsid->minor);
3272                 bitmap[0] &= ~FATTR4_WORD0_FSID;
3273                 ret = NFS_ATTR_FATTR_FSID;
3274         }
3275         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3276                         (unsigned long long)fsid->major,
3277                         (unsigned long long)fsid->minor);
3278         return ret;
3279 out_overflow:
3280         print_overflow_msg(__func__, xdr);
3281         return -EIO;
3282 }
3283
3284 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3285 {
3286         __be32 *p;
3287
3288         *res = 60;
3289         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3290                 return -EIO;
3291         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3292                 p = xdr_inline_decode(xdr, 4);
3293                 if (unlikely(!p))
3294                         goto out_overflow;
3295                 *res = be32_to_cpup(p);
3296                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3297         }
3298         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3299         return 0;
3300 out_overflow:
3301         print_overflow_msg(__func__, xdr);
3302         return -EIO;
3303 }
3304
3305 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3306 {
3307         __be32 *p;
3308
3309         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3310                 return -EIO;
3311         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3312                 p = xdr_inline_decode(xdr, 4);
3313                 if (unlikely(!p))
3314                         goto out_overflow;
3315                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3316                 *res = -be32_to_cpup(p);
3317         }
3318         return 0;
3319 out_overflow:
3320         print_overflow_msg(__func__, xdr);
3321         return -EIO;
3322 }
3323
3324 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3325 {
3326         __be32 *p;
3327         int len;
3328
3329         if (fh != NULL)
3330                 memset(fh, 0, sizeof(*fh));
3331
3332         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3333                 return -EIO;
3334         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3335                 p = xdr_inline_decode(xdr, 4);
3336                 if (unlikely(!p))
3337                         goto out_overflow;
3338                 len = be32_to_cpup(p);
3339                 if (len > NFS4_FHSIZE)
3340                         return -EIO;
3341                 p = xdr_inline_decode(xdr, len);
3342                 if (unlikely(!p))
3343                         goto out_overflow;
3344                 if (fh != NULL) {
3345                         memcpy(fh->data, p, len);
3346                         fh->size = len;
3347                 }
3348                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3349         }
3350         return 0;
3351 out_overflow:
3352         print_overflow_msg(__func__, xdr);
3353         return -EIO;
3354 }
3355
3356 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3357 {
3358         __be32 *p;
3359
3360         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
3361         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3362                 return -EIO;
3363         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3364                 p = xdr_inline_decode(xdr, 4);
3365                 if (unlikely(!p))
3366                         goto out_overflow;
3367                 *res = be32_to_cpup(p);
3368                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3369         }
3370         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3371         return 0;
3372 out_overflow:
3373         print_overflow_msg(__func__, xdr);
3374         return -EIO;
3375 }
3376
3377 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3378 {
3379         __be32 *p;
3380         int ret = 0;
3381
3382         *fileid = 0;
3383         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3384                 return -EIO;
3385         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3386                 p = xdr_inline_decode(xdr, 8);
3387                 if (unlikely(!p))
3388                         goto out_overflow;
3389                 xdr_decode_hyper(p, fileid);
3390                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3391                 ret = NFS_ATTR_FATTR_FILEID;
3392         }
3393         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3394         return ret;
3395 out_overflow:
3396         print_overflow_msg(__func__, xdr);
3397         return -EIO;
3398 }
3399
3400 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3401 {
3402         __be32 *p;
3403         int ret = 0;
3404
3405         *fileid = 0;
3406         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3407                 return -EIO;
3408         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3409                 p = xdr_inline_decode(xdr, 8);
3410                 if (unlikely(!p))
3411                         goto out_overflow;
3412                 xdr_decode_hyper(p, fileid);
3413                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3414                 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3415         }
3416         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3417         return ret;
3418 out_overflow:
3419         print_overflow_msg(__func__, xdr);
3420         return -EIO;
3421 }
3422
3423 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3424 {
3425         __be32 *p;
3426         int status = 0;
3427
3428         *res = 0;
3429         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3430                 return -EIO;
3431         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3432                 p = xdr_inline_decode(xdr, 8);
3433                 if (unlikely(!p))
3434                         goto out_overflow;
3435                 xdr_decode_hyper(p, res);
3436                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3437         }
3438         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3439         return status;
3440 out_overflow:
3441         print_overflow_msg(__func__, xdr);
3442         return -EIO;
3443 }
3444
3445 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3446 {
3447         __be32 *p;
3448         int status = 0;
3449
3450         *res = 0;
3451         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3452                 return -EIO;
3453         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3454                 p = xdr_inline_decode(xdr, 8);
3455                 if (unlikely(!p))
3456                         goto out_overflow;
3457                 xdr_decode_hyper(p, res);
3458                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3459         }
3460         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3461         return status;
3462 out_overflow:
3463         print_overflow_msg(__func__, xdr);
3464         return -EIO;
3465 }
3466
3467 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3468 {
3469         __be32 *p;
3470         int status = 0;
3471
3472         *res = 0;
3473         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3474                 return -EIO;
3475         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3476                 p = xdr_inline_decode(xdr, 8);
3477                 if (unlikely(!p))
3478                         goto out_overflow;
3479                 xdr_decode_hyper(p, res);
3480                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3481         }
3482         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3483         return status;
3484 out_overflow:
3485         print_overflow_msg(__func__, xdr);
3486         return -EIO;
3487 }
3488
3489 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3490 {
3491         u32 n;
3492         __be32 *p;
3493         int status = 0;
3494
3495         p = xdr_inline_decode(xdr, 4);
3496         if (unlikely(!p))
3497                 goto out_overflow;
3498         n = be32_to_cpup(p);
3499         if (n == 0)
3500                 goto root_path;
3501         dprintk("pathname4: ");
3502         path->ncomponents = 0;
3503         while (path->ncomponents < n) {
3504                 struct nfs4_string *component = &path->components[path->ncomponents];
3505                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3506                 if (unlikely(status != 0))
3507                         goto out_eio;
3508                 if (unlikely(nfs_debug & NFSDBG_XDR))
3509                         pr_cont("%s%.*s ",
3510                                 (path->ncomponents != n ? "/ " : ""),
3511                                 component->len, component->data);
3512                 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
3513                         path->ncomponents++;
3514                 else {
3515                         dprintk("cannot parse %d components in path\n", n);
3516                         goto out_eio;
3517                 }
3518         }
3519 out:
3520         return status;
3521 root_path:
3522 /* a root pathname is sent as a zero component4 */
3523         path->ncomponents = 1;
3524         path->components[0].len=0;
3525         path->components[0].data=NULL;
3526         dprintk("pathname4: /\n");
3527         goto out;
3528 out_eio:
3529         dprintk(" status %d", status);
3530         status = -EIO;
3531         goto out;
3532 out_overflow:
3533         print_overflow_msg(__func__, xdr);
3534         return -EIO;
3535 }
3536
3537 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3538 {
3539         int n;
3540         __be32 *p;
3541         int status = -EIO;
3542
3543         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3544                 goto out;
3545         status = 0;
3546         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3547                 goto out;
3548         status = -EIO;
3549         /* Ignore borken servers that return unrequested attrs */
3550         if (unlikely(res == NULL))
3551                 goto out;
3552         dprintk("%s: fsroot:\n", __func__);
3553         status = decode_pathname(xdr, &res->fs_path);
3554         if (unlikely(status != 0))
3555                 goto out;
3556         p = xdr_inline_decode(xdr, 4);
3557         if (unlikely(!p))
3558                 goto out_overflow;
3559         n = be32_to_cpup(p);
3560         if (n <= 0)
3561                 goto out_eio;
3562         res->nlocations = 0;
3563         while (res->nlocations < n) {
3564                 u32 m;
3565                 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
3566
3567                 p = xdr_inline_decode(xdr, 4);
3568                 if (unlikely(!p))
3569                         goto out_overflow;
3570                 m = be32_to_cpup(p);
3571
3572                 loc->nservers = 0;
3573                 dprintk("%s: servers:\n", __func__);
3574                 while (loc->nservers < m) {
3575                         struct nfs4_string *server = &loc->servers[loc->nservers];
3576                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3577                         if (unlikely(status != 0))
3578                                 goto out_eio;
3579                         dprintk("%s ", server->data);
3580                         if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
3581                                 loc->nservers++;
3582                         else {
3583                                 unsigned int i;
3584                                 dprintk("%s: using first %u of %u servers "
3585                                         "returned for location %u\n",
3586                                                 __func__,
3587                                                 NFS4_FS_LOCATION_MAXSERVERS,
3588                                                 m, res->nlocations);
3589                                 for (i = loc->nservers; i < m; i++) {
3590                                         unsigned int len;
3591                                         char *data;
3592                                         status = decode_opaque_inline(xdr, &len, &data);
3593                                         if (unlikely(status != 0))
3594                                                 goto out_eio;
3595                                 }
3596                         }
3597                 }
3598                 status = decode_pathname(xdr, &loc->rootpath);
3599                 if (unlikely(status != 0))
3600                         goto out_eio;
3601                 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
3602                         res->nlocations++;
3603         }
3604         if (res->nlocations != 0)
3605                 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3606 out:
3607         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3608         return status;
3609 out_overflow:
3610         print_overflow_msg(__func__, xdr);
3611 out_eio:
3612         status = -EIO;
3613         goto out;
3614 }
3615
3616 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3617 {
3618         __be32 *p;
3619         int status = 0;
3620
3621         *res = 0;
3622         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3623                 return -EIO;
3624         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3625                 p = xdr_inline_decode(xdr, 8);
3626                 if (unlikely(!p))
3627                         goto out_overflow;
3628                 xdr_decode_hyper(p, res);
3629                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3630         }
3631         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3632         return status;
3633 out_overflow:
3634         print_overflow_msg(__func__, xdr);
3635         return -EIO;
3636 }
3637
3638 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3639 {
3640         __be32 *p;
3641         int status = 0;
3642
3643         *maxlink = 1;
3644         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3645                 return -EIO;
3646         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3647                 p = xdr_inline_decode(xdr, 4);
3648                 if (unlikely(!p))
3649                         goto out_overflow;
3650                 *maxlink = be32_to_cpup(p);
3651                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3652         }
3653         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3654         return status;
3655 out_overflow:
3656         print_overflow_msg(__func__, xdr);
3657         return -EIO;
3658 }
3659
3660 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3661 {
3662         __be32 *p;
3663         int status = 0;
3664
3665         *maxname = 1024;
3666         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3667                 return -EIO;
3668         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3669                 p = xdr_inline_decode(xdr, 4);
3670                 if (unlikely(!p))
3671                         goto out_overflow;
3672                 *maxname = be32_to_cpup(p);
3673                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3674         }
3675         dprintk("%s: maxname=%u\n", __func__, *maxname);
3676         return status;
3677 out_overflow:
3678         print_overflow_msg(__func__, xdr);
3679         return -EIO;
3680 }
3681
3682 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3683 {
3684         __be32 *p;
3685         int status = 0;
3686
3687         *res = 1024;
3688         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3689                 return -EIO;
3690         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3691                 uint64_t maxread;
3692                 p = xdr_inline_decode(xdr, 8);
3693                 if (unlikely(!p))
3694                         goto out_overflow;
3695                 xdr_decode_hyper(p, &maxread);
3696                 if (maxread > 0x7FFFFFFF)
3697                         maxread = 0x7FFFFFFF;
3698                 *res = (uint32_t)maxread;
3699                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3700         }
3701         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3702         return status;
3703 out_overflow:
3704         print_overflow_msg(__func__, xdr);
3705         return -EIO;
3706 }
3707
3708 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3709 {
3710         __be32 *p;
3711         int status = 0;
3712
3713         *res = 1024;
3714         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3715                 return -EIO;
3716         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3717                 uint64_t maxwrite;
3718                 p = xdr_inline_decode(xdr, 8);
3719                 if (unlikely(!p))
3720                         goto out_overflow;
3721                 xdr_decode_hyper(p, &maxwrite);
3722                 if (maxwrite > 0x7FFFFFFF)
3723                         maxwrite = 0x7FFFFFFF;
3724                 *res = (uint32_t)maxwrite;
3725                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3726         }
3727         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3728         return status;
3729 out_overflow:
3730         print_overflow_msg(__func__, xdr);
3731         return -EIO;
3732 }
3733
3734 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3735 {
3736         uint32_t tmp;
3737         __be32 *p;
3738         int ret = 0;
3739
3740         *mode = 0;
3741         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3742                 return -EIO;
3743         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3744                 p = xdr_inline_decode(xdr, 4);
3745                 if (unlikely(!p))
3746                         goto out_overflow;
3747                 tmp = be32_to_cpup(p);
3748                 *mode = tmp & ~S_IFMT;
3749                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3750                 ret = NFS_ATTR_FATTR_MODE;
3751         }
3752         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3753         return ret;
3754 out_overflow:
3755         print_overflow_msg(__func__, xdr);
3756         return -EIO;
3757 }
3758
3759 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3760 {
3761         __be32 *p;
3762         int ret = 0;
3763
3764         *nlink = 1;
3765         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3766                 return -EIO;
3767         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3768                 p = xdr_inline_decode(xdr, 4);
3769                 if (unlikely(!p))
3770                         goto out_overflow;
3771                 *nlink = be32_to_cpup(p);
3772                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3773                 ret = NFS_ATTR_FATTR_NLINK;
3774         }
3775         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3776         return ret;
3777 out_overflow:
3778         print_overflow_msg(__func__, xdr);
3779         return -EIO;
3780 }
3781
3782 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3783                 const struct nfs_server *server, uint32_t *uid,
3784                 struct nfs4_string *owner_name)
3785 {
3786         uint32_t len;
3787         __be32 *p;
3788         int ret = 0;
3789
3790         *uid = -2;
3791         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3792                 return -EIO;
3793         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3794                 p = xdr_inline_decode(xdr, 4);
3795                 if (unlikely(!p))
3796                         goto out_overflow;
3797                 len = be32_to_cpup(p);
3798                 p = xdr_inline_decode(xdr, len);
3799                 if (unlikely(!p))
3800                         goto out_overflow;
3801                 if (owner_name != NULL) {
3802                         owner_name->data = kmemdup(p, len, GFP_NOWAIT);
3803                         if (owner_name->data != NULL) {
3804                                 owner_name->len = len;
3805                                 ret = NFS_ATTR_FATTR_OWNER_NAME;
3806                         }
3807                 } else if (len < XDR_MAX_NETOBJ) {
3808                         if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3809                                 ret = NFS_ATTR_FATTR_OWNER;
3810                         else
3811                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3812                                                 __func__);
3813                 } else
3814                         dprintk("%s: name too long (%u)!\n",
3815                                         __func__, len);
3816                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3817         }
3818         dprintk("%s: uid=%d\n", __func__, (int)*uid);
3819         return ret;
3820 out_overflow:
3821         print_overflow_msg(__func__, xdr);
3822         return -EIO;
3823 }
3824
3825 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3826                 const struct nfs_server *server, uint32_t *gid,
3827                 struct nfs4_string *group_name)
3828 {
3829         uint32_t len;
3830         __be32 *p;
3831         int ret = 0;
3832
3833         *gid = -2;
3834         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3835                 return -EIO;
3836         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3837                 p = xdr_inline_decode(xdr, 4);
3838                 if (unlikely(!p))
3839                         goto out_overflow;
3840                 len = be32_to_cpup(p);
3841                 p = xdr_inline_decode(xdr, len);
3842                 if (unlikely(!p))
3843                         goto out_overflow;
3844                 if (group_name != NULL) {
3845                         group_name->data = kmemdup(p, len, GFP_NOWAIT);
3846                         if (group_name->data != NULL) {
3847                                 group_name->len = len;
3848                                 ret = NFS_ATTR_FATTR_GROUP_NAME;
3849                         }
3850                 } else if (len < XDR_MAX_NETOBJ) {
3851                         if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3852                                 ret = NFS_ATTR_FATTR_GROUP;
3853                         else
3854                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3855                                                 __func__);
3856                 } else
3857                         dprintk("%s: name too long (%u)!\n",
3858                                         __func__, len);
3859                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3860         }
3861         dprintk("%s: gid=%d\n", __func__, (int)*gid);
3862         return ret;
3863 out_overflow:
3864         print_overflow_msg(__func__, xdr);
3865         return -EIO;
3866 }
3867
3868 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3869 {
3870         uint32_t major = 0, minor = 0;
3871         __be32 *p;
3872         int ret = 0;
3873
3874         *rdev = MKDEV(0,0);
3875         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3876                 return -EIO;
3877         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3878                 dev_t tmp;
3879
3880                 p = xdr_inline_decode(xdr, 8);
3881                 if (unlikely(!p))
3882                         goto out_overflow;
3883                 major = be32_to_cpup(p++);
3884                 minor = be32_to_cpup(p);
3885                 tmp = MKDEV(major, minor);
3886                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3887                         *rdev = tmp;
3888                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3889                 ret = NFS_ATTR_FATTR_RDEV;
3890         }
3891         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3892         return ret;
3893 out_overflow:
3894         print_overflow_msg(__func__, xdr);
3895         return -EIO;
3896 }
3897
3898 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3899 {
3900         __be32 *p;
3901         int status = 0;
3902
3903         *res = 0;
3904         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3905                 return -EIO;
3906         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3907                 p = xdr_inline_decode(xdr, 8);
3908                 if (unlikely(!p))
3909                         goto out_overflow;
3910                 xdr_decode_hyper(p, res);
3911                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3912         }
3913         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3914         return status;
3915 out_overflow:
3916         print_overflow_msg(__func__, xdr);
3917         return -EIO;
3918 }
3919
3920 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3921 {
3922         __be32 *p;
3923         int status = 0;
3924
3925         *res = 0;
3926         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3927                 return -EIO;
3928         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3929                 p = xdr_inline_decode(xdr, 8);
3930                 if (unlikely(!p))
3931                         goto out_overflow;
3932                 xdr_decode_hyper(p, res);
3933                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3934         }
3935         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3936         return status;
3937 out_overflow:
3938         print_overflow_msg(__func__, xdr);
3939         return -EIO;
3940 }
3941
3942 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3943 {
3944         __be32 *p;
3945         int status = 0;
3946
3947         *res = 0;
3948         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3949                 return -EIO;
3950         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3951                 p = xdr_inline_decode(xdr, 8);
3952                 if (unlikely(!p))
3953                         goto out_overflow;
3954                 xdr_decode_hyper(p, res);
3955                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3956         }
3957         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3958         return status;
3959 out_overflow:
3960         print_overflow_msg(__func__, xdr);
3961         return -EIO;
3962 }
3963
3964 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3965 {
3966         __be32 *p;
3967         int ret = 0;
3968
3969         *used = 0;
3970         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3971                 return -EIO;
3972         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3973                 p = xdr_inline_decode(xdr, 8);
3974                 if (unlikely(!p))
3975                         goto out_overflow;
3976                 xdr_decode_hyper(p, used);
3977                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3978                 ret = NFS_ATTR_FATTR_SPACE_USED;
3979         }
3980         dprintk("%s: space used=%Lu\n", __func__,
3981                         (unsigned long long)*used);
3982         return ret;
3983 out_overflow:
3984         print_overflow_msg(__func__, xdr);
3985         return -EIO;
3986 }
3987
3988 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
3989 {
3990         __be32 *p;
3991         uint64_t sec;
3992         uint32_t nsec;
3993
3994         p = xdr_inline_decode(xdr, 12);
3995         if (unlikely(!p))
3996                 goto out_overflow;
3997         p = xdr_decode_hyper(p, &sec);
3998         nsec = be32_to_cpup(p);
3999         time->tv_sec = (time_t)sec;
4000         time->tv_nsec = (long)nsec;
4001         return 0;
4002 out_overflow:
4003         print_overflow_msg(__func__, xdr);
4004         return -EIO;
4005 }
4006
4007 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4008 {
4009         int status = 0;
4010
4011         time->tv_sec = 0;
4012         time->tv_nsec = 0;
4013         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4014                 return -EIO;
4015         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4016                 status = decode_attr_time(xdr, time);
4017                 if (status == 0)
4018                         status = NFS_ATTR_FATTR_ATIME;
4019                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4020         }
4021         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4022         return status;
4023 }
4024
4025 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4026 {
4027         int status = 0;
4028
4029         time->tv_sec = 0;
4030         time->tv_nsec = 0;
4031         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4032                 return -EIO;
4033         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4034                 status = decode_attr_time(xdr, time);
4035                 if (status == 0)
4036                         status = NFS_ATTR_FATTR_CTIME;
4037                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4038         }
4039         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4040         return status;
4041 }
4042
4043 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4044                                   struct timespec *time)
4045 {
4046         int status = 0;
4047
4048         time->tv_sec = 0;
4049         time->tv_nsec = 0;
4050         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4051                 return -EIO;
4052         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4053                 status = decode_attr_time(xdr, time);
4054                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4055         }
4056         dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4057                 (long)time->tv_nsec);
4058         return status;
4059 }
4060
4061 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4062 {
4063         int status = 0;
4064
4065         time->tv_sec = 0;
4066         time->tv_nsec = 0;
4067         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4068                 return -EIO;
4069         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4070                 status = decode_attr_time(xdr, time);
4071                 if (status == 0)
4072                         status = NFS_ATTR_FATTR_MTIME;
4073                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4074         }
4075         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4076         return status;
4077 }
4078
4079 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
4080 {
4081         unsigned int attrwords = XDR_QUADLEN(attrlen);
4082         unsigned int nwords = xdr->p - savep;
4083
4084         if (unlikely(attrwords != nwords)) {
4085                 dprintk("%s: server returned incorrect attribute length: "
4086                         "%u %c %u\n",
4087                                 __func__,
4088                                 attrwords << 2,
4089                                 (attrwords < nwords) ? '<' : '>',
4090                                 nwords << 2);
4091                 return -EIO;
4092         }
4093         return 0;
4094 }
4095
4096 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4097 {
4098         __be32 *p;
4099
4100         p = xdr_inline_decode(xdr, 20);
4101         if (unlikely(!p))
4102                 goto out_overflow;
4103         cinfo->atomic = be32_to_cpup(p++);
4104         p = xdr_decode_hyper(p, &cinfo->before);
4105         xdr_decode_hyper(p, &cinfo->after);
4106         return 0;
4107 out_overflow:
4108         print_overflow_msg(__func__, xdr);
4109         return -EIO;
4110 }
4111
4112 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
4113 {
4114         __be32 *p;
4115         uint32_t supp, acc;
4116         int status;
4117
4118         status = decode_op_hdr(xdr, OP_ACCESS);
4119         if (status)
4120                 return status;
4121         p = xdr_inline_decode(xdr, 8);
4122         if (unlikely(!p))
4123                 goto out_overflow;
4124         supp = be32_to_cpup(p++);
4125         acc = be32_to_cpup(p);
4126         access->supported = supp;
4127         access->access = acc;
4128         return 0;
4129 out_overflow:
4130         print_overflow_msg(__func__, xdr);
4131         return -EIO;
4132 }
4133
4134 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4135 {
4136         __be32 *p;
4137
4138         p = xdr_inline_decode(xdr, len);
4139         if (likely(p)) {
4140                 memcpy(buf, p, len);
4141                 return 0;
4142         }
4143         print_overflow_msg(__func__, xdr);
4144         return -EIO;
4145 }
4146
4147 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4148 {
4149         return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4150 }
4151
4152 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4153 {
4154         int status;
4155
4156         status = decode_op_hdr(xdr, OP_CLOSE);
4157         if (status != -EIO)
4158                 nfs_increment_open_seqid(status, res->seqid);
4159         if (!status)
4160                 status = decode_stateid(xdr, &res->stateid);
4161         return status;
4162 }
4163
4164 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4165 {
4166         return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4167 }
4168
4169 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
4170 {
4171         int status;
4172
4173         status = decode_op_hdr(xdr, OP_COMMIT);
4174         if (!status)
4175                 status = decode_verifier(xdr, res->verf->verifier);
4176         return status;
4177 }
4178
4179 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4180 {
4181         __be32 *p;
4182         uint32_t bmlen;
4183         int status;
4184
4185         status = decode_op_hdr(xdr, OP_CREATE);
4186         if (status)
4187                 return status;
4188         if ((status = decode_change_info(xdr, cinfo)))
4189                 return status;
4190         p = xdr_inline_decode(xdr, 4);
4191         if (unlikely(!p))
4192                 goto out_overflow;
4193         bmlen = be32_to_cpup(p);
4194         p = xdr_inline_decode(xdr, bmlen << 2);
4195         if (likely(p))
4196                 return 0;
4197 out_overflow:
4198         print_overflow_msg(__func__, xdr);
4199         return -EIO;
4200 }
4201
4202 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4203 {
4204         __be32 *savep;
4205         uint32_t attrlen, bitmap[3] = {0};
4206         int status;
4207
4208         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4209                 goto xdr_error;
4210         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4211                 goto xdr_error;
4212         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4213                 goto xdr_error;
4214         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4215                 goto xdr_error;
4216         if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4217                                                  &res->fh_expire_type)) != 0)
4218                 goto xdr_error;
4219         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4220                 goto xdr_error;
4221         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4222                 goto xdr_error;
4223         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4224                 goto xdr_error;
4225         status = verify_attr_len(xdr, savep, attrlen);
4226 xdr_error:
4227         dprintk("%s: xdr returned %d!\n", __func__, -status);
4228         return status;
4229 }
4230
4231 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4232 {
4233         __be32 *savep;
4234         uint32_t attrlen, bitmap[3] = {0};
4235         int status;
4236
4237         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4238                 goto xdr_error;
4239         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4240                 goto xdr_error;
4241         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4242                 goto xdr_error;
4243
4244         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4245                 goto xdr_error;
4246         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4247                 goto xdr_error;
4248         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4249                 goto xdr_error;
4250         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4251                 goto xdr_error;
4252         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4253                 goto xdr_error;
4254         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4255                 goto xdr_error;
4256
4257         status = verify_attr_len(xdr, savep, attrlen);
4258 xdr_error:
4259         dprintk("%s: xdr returned %d!\n", __func__, -status);
4260         return status;
4261 }
4262
4263 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4264 {
4265         __be32 *savep;
4266         uint32_t attrlen, bitmap[3] = {0};
4267         int status;
4268
4269         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4270                 goto xdr_error;
4271         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4272                 goto xdr_error;
4273         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4274                 goto xdr_error;
4275
4276         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4277                 goto xdr_error;
4278         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4279                 goto xdr_error;
4280
4281         status = verify_attr_len(xdr, savep, attrlen);
4282 xdr_error:
4283         dprintk("%s: xdr returned %d!\n", __func__, -status);
4284         return status;
4285 }
4286
4287 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4288                 struct nfs_fattr *fattr, struct nfs_fh *fh,
4289                 struct nfs4_fs_locations *fs_loc,
4290                 const struct nfs_server *server)
4291 {
4292         int status;
4293         umode_t fmode = 0;
4294         uint32_t type;
4295         int32_t err;
4296
4297         status = decode_attr_type(xdr, bitmap, &type);
4298         if (status < 0)
4299                 goto xdr_error;
4300         fattr->mode = 0;
4301         if (status != 0) {
4302                 fattr->mode |= nfs_type2fmt[type];
4303                 fattr->valid |= status;
4304         }
4305
4306         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4307         if (status < 0)
4308                 goto xdr_error;
4309         fattr->valid |= status;
4310
4311         status = decode_attr_size(xdr, bitmap, &fattr->size);
4312         if (status < 0)
4313                 goto xdr_error;
4314         fattr->valid |= status;
4315
4316         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4317         if (status < 0)
4318                 goto xdr_error;
4319         fattr->valid |= status;
4320
4321         err = 0;
4322         status = decode_attr_error(xdr, bitmap, &err);
4323         if (status < 0)
4324                 goto xdr_error;
4325         if (err == -NFS4ERR_WRONGSEC)
4326                 nfs_fixup_secinfo_attributes(fattr, fh);
4327
4328         status = decode_attr_filehandle(xdr, bitmap, fh);
4329         if (status < 0)
4330                 goto xdr_error;
4331
4332         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4333         if (status < 0)
4334                 goto xdr_error;
4335         fattr->valid |= status;
4336
4337         status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4338         if (status < 0)
4339                 goto xdr_error;
4340         fattr->valid |= status;
4341
4342         status = decode_attr_mode(xdr, bitmap, &fmode);
4343         if (status < 0)
4344                 goto xdr_error;
4345         if (status != 0) {
4346                 fattr->mode |= fmode;
4347                 fattr->valid |= status;
4348         }
4349
4350         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4351         if (status < 0)
4352                 goto xdr_error;
4353         fattr->valid |= status;
4354
4355         status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4356         if (status < 0)
4357                 goto xdr_error;
4358         fattr->valid |= status;
4359
4360         status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4361         if (status < 0)
4362                 goto xdr_error;
4363         fattr->valid |= status;
4364
4365         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4366         if (status < 0)
4367                 goto xdr_error;
4368         fattr->valid |= status;
4369
4370         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4371         if (status < 0)
4372                 goto xdr_error;
4373         fattr->valid |= status;
4374
4375         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4376         if (status < 0)
4377                 goto xdr_error;
4378         fattr->valid |= status;
4379
4380         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4381         if (status < 0)
4382                 goto xdr_error;
4383         fattr->valid |= status;
4384
4385         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4386         if (status < 0)
4387                 goto xdr_error;
4388         fattr->valid |= status;
4389
4390         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4391         if (status < 0)
4392                 goto xdr_error;
4393         fattr->valid |= status;
4394
4395 xdr_error:
4396         dprintk("%s: xdr returned %d\n", __func__, -status);
4397         return status;
4398 }
4399
4400 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4401                 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4402                 const struct nfs_server *server)
4403 {
4404         __be32 *savep;
4405         uint32_t attrlen,
4406                  bitmap[3] = {0};
4407         int status;
4408
4409         status = decode_op_hdr(xdr, OP_GETATTR);
4410         if (status < 0)
4411                 goto xdr_error;
4412
4413         status = decode_attr_bitmap(xdr, bitmap);
4414         if (status < 0)
4415                 goto xdr_error;
4416
4417         status = decode_attr_length(xdr, &attrlen, &savep);
4418         if (status < 0)
4419                 goto xdr_error;
4420
4421         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc, server);
4422         if (status < 0)
4423                 goto xdr_error;
4424
4425         status = verify_attr_len(xdr, savep, attrlen);
4426 xdr_error:
4427         dprintk("%s: xdr returned %d\n", __func__, -status);
4428         return status;
4429 }
4430
4431 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4432                 const struct nfs_server *server)
4433 {
4434         return decode_getfattr_generic(xdr, fattr, NULL, NULL, server);
4435 }
4436
4437 /*
4438  * Decode potentially multiple layout types. Currently we only support
4439  * one layout driver per file system.
4440  */
4441 static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4442                                          uint32_t *layouttype)
4443 {
4444         uint32_t *p;
4445         int num;
4446
4447         p = xdr_inline_decode(xdr, 4);
4448         if (unlikely(!p))
4449                 goto out_overflow;
4450         num = be32_to_cpup(p);
4451
4452         /* pNFS is not supported by the underlying file system */
4453         if (num == 0) {
4454                 *layouttype = 0;
4455                 return 0;
4456         }
4457         if (num > 1)
4458                 printk(KERN_INFO "NFS: %s: Warning: Multiple pNFS layout "
4459                         "drivers per filesystem not supported\n", __func__);
4460
4461         /* Decode and set first layout type, move xdr->p past unused types */
4462         p = xdr_inline_decode(xdr, num * 4);
4463         if (unlikely(!p))
4464                 goto out_overflow;
4465         *layouttype = be32_to_cpup(p);
4466         return 0;
4467 out_overflow:
4468         print_overflow_msg(__func__, xdr);
4469         return -EIO;
4470 }
4471
4472 /*
4473  * The type of file system exported.
4474  * Note we must ensure that layouttype is set in any non-error case.
4475  */
4476 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4477                                 uint32_t *layouttype)
4478 {
4479         int status = 0;
4480
4481         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4482         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4483                 return -EIO;
4484         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4485                 status = decode_first_pnfs_layout_type(xdr, layouttype);
4486                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4487         } else
4488                 *layouttype = 0;
4489         return status;
4490 }
4491
4492 /*
4493  * The prefered block size for layout directed io
4494  */
4495 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4496                                       uint32_t *res)
4497 {
4498         __be32 *p;
4499
4500         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4501         *res = 0;
4502         if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4503                 p = xdr_inline_decode(xdr, 4);
4504                 if (unlikely(!p)) {
4505                         print_overflow_msg(__func__, xdr);
4506                         return -EIO;
4507                 }
4508                 *res = be32_to_cpup(p);
4509                 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4510         }
4511         return 0;
4512 }
4513
4514 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4515 {
4516         __be32 *savep;
4517         uint32_t attrlen, bitmap[3];
4518         int status;
4519
4520         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4521                 goto xdr_error;
4522         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4523                 goto xdr_error;
4524         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4525                 goto xdr_error;
4526
4527         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4528
4529         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4530                 goto xdr_error;
4531         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4532                 goto xdr_error;
4533         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4534                 goto xdr_error;
4535         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4536         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4537                 goto xdr_error;
4538         fsinfo->wtpref = fsinfo->wtmax;
4539         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4540         if (status != 0)
4541                 goto xdr_error;
4542         status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4543         if (status != 0)
4544                 goto xdr_error;
4545         status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4546         if (status)
4547                 goto xdr_error;
4548
4549         status = verify_attr_len(xdr, savep, attrlen);
4550 xdr_error:
4551         dprintk("%s: xdr returned %d!\n", __func__, -status);
4552         return status;
4553 }
4554
4555 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4556 {
4557         __be32 *p;
4558         uint32_t len;
4559         int status;
4560
4561         /* Zero handle first to allow comparisons */
4562         memset(fh, 0, sizeof(*fh));
4563
4564         status = decode_op_hdr(xdr, OP_GETFH);
4565         if (status)
4566                 return status;
4567
4568         p = xdr_inline_decode(xdr, 4);
4569         if (unlikely(!p))
4570                 goto out_overflow;
4571         len = be32_to_cpup(p);
4572         if (len > NFS4_FHSIZE)
4573                 return -EIO;
4574         fh->size = len;
4575         p = xdr_inline_decode(xdr, len);
4576         if (unlikely(!p))
4577                 goto out_overflow;
4578         memcpy(fh->data, p, len);
4579         return 0;
4580 out_overflow:
4581         print_overflow_msg(__func__, xdr);
4582         return -EIO;
4583 }
4584
4585 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4586 {
4587         int status;
4588
4589         status = decode_op_hdr(xdr, OP_LINK);
4590         if (status)
4591                 return status;
4592         return decode_change_info(xdr, cinfo);
4593 }
4594
4595 /*
4596  * We create the owner, so we know a proper owner.id length is 4.
4597  */
4598 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4599 {
4600         uint64_t offset, length, clientid;
4601         __be32 *p;
4602         uint32_t namelen, type;
4603
4604         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4605         if (unlikely(!p))
4606                 goto out_overflow;
4607         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4608         p = xdr_decode_hyper(p, &length);
4609         type = be32_to_cpup(p++); /* 4 byte read */
4610         if (fl != NULL) { /* manipulate file lock */
4611                 fl->fl_start = (loff_t)offset;
4612                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4613                 if (length == ~(uint64_t)0)
4614                         fl->fl_end = OFFSET_MAX;
4615                 fl->fl_type = F_WRLCK;
4616                 if (type & 1)
4617                         fl->fl_type = F_RDLCK;
4618                 fl->fl_pid = 0;
4619         }
4620         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4621         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4622         p = xdr_inline_decode(xdr, namelen); /* variable size field */
4623         if (likely(p))
4624                 return -NFS4ERR_DENIED;
4625 out_overflow:
4626         print_overflow_msg(__func__, xdr);
4627         return -EIO;
4628 }
4629
4630 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4631 {
4632         int status;
4633
4634         status = decode_op_hdr(xdr, OP_LOCK);
4635         if (status == -EIO)
4636                 goto out;
4637         if (status == 0) {
4638                 status = decode_stateid(xdr, &res->stateid);
4639                 if (unlikely(status))
4640                         goto out;
4641         } else if (status == -NFS4ERR_DENIED)
4642                 status = decode_lock_denied(xdr, NULL);
4643         if (res->open_seqid != NULL)
4644                 nfs_increment_open_seqid(status, res->open_seqid);
4645         nfs_increment_lock_seqid(status, res->lock_seqid);
4646 out:
4647         return status;
4648 }
4649
4650 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4651 {
4652         int status;
4653         status = decode_op_hdr(xdr, OP_LOCKT);
4654         if (status == -NFS4ERR_DENIED)
4655                 return decode_lock_denied(xdr, res->denied);
4656         return status;
4657 }
4658
4659 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4660 {
4661         int status;
4662
4663         status = decode_op_hdr(xdr, OP_LOCKU);
4664         if (status != -EIO)
4665                 nfs_increment_lock_seqid(status, res->seqid);
4666         if (status == 0)
4667                 status = decode_stateid(xdr, &res->stateid);
4668         return status;
4669 }
4670
4671 static int decode_release_lockowner(struct xdr_stream *xdr)
4672 {
4673         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4674 }
4675
4676 static int decode_lookup(struct xdr_stream *xdr)
4677 {
4678         return decode_op_hdr(xdr, OP_LOOKUP);
4679 }
4680
4681 /* This is too sick! */
4682 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4683 {
4684         __be32 *p;
4685         uint32_t limit_type, nblocks, blocksize;
4686
4687         p = xdr_inline_decode(xdr, 12);
4688         if (unlikely(!p))
4689                 goto out_overflow;
4690         limit_type = be32_to_cpup(p++);
4691         switch (limit_type) {
4692         case 1:
4693                 xdr_decode_hyper(p, maxsize);
4694                 break;
4695         case 2:
4696                 nblocks = be32_to_cpup(p++);
4697                 blocksize = be32_to_cpup(p);
4698                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4699         }
4700         return 0;
4701 out_overflow:
4702         print_overflow_msg(__func__, xdr);
4703         return -EIO;
4704 }
4705
4706 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4707 {
4708         __be32 *p;
4709         uint32_t delegation_type;
4710         int status;
4711
4712         p = xdr_inline_decode(xdr, 4);
4713         if (unlikely(!p))
4714                 goto out_overflow;
4715         delegation_type = be32_to_cpup(p);
4716         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4717                 res->delegation_type = 0;
4718                 return 0;
4719         }
4720         status = decode_stateid(xdr, &res->delegation);
4721         if (unlikely(status))
4722                 return status;
4723         p = xdr_inline_decode(xdr, 4);
4724         if (unlikely(!p))
4725                 goto out_overflow;
4726         res->do_recall = be32_to_cpup(p);
4727
4728         switch (delegation_type) {
4729         case NFS4_OPEN_DELEGATE_READ:
4730                 res->delegation_type = FMODE_READ;
4731                 break;
4732         case NFS4_OPEN_DELEGATE_WRITE:
4733                 res->delegation_type = FMODE_WRITE|FMODE_READ;
4734                 if (decode_space_limit(xdr, &res->maxsize) < 0)
4735                                 return -EIO;
4736         }
4737         return decode_ace(xdr, NULL, res->server->nfs_client);
4738 out_overflow:
4739         print_overflow_msg(__func__, xdr);
4740         return -EIO;
4741 }
4742
4743 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
4744 {
4745         __be32 *p;
4746         uint32_t savewords, bmlen, i;
4747         int status;
4748
4749         status = decode_op_hdr(xdr, OP_OPEN);
4750         if (status != -EIO)
4751                 nfs_increment_open_seqid(status, res->seqid);
4752         if (!status)
4753                 status = decode_stateid(xdr, &res->stateid);
4754         if (unlikely(status))
4755                 return status;
4756
4757         decode_change_info(xdr, &res->cinfo);
4758
4759         p = xdr_inline_decode(xdr, 8);
4760         if (unlikely(!p))
4761                 goto out_overflow;
4762         res->rflags = be32_to_cpup(p++);
4763         bmlen = be32_to_cpup(p);
4764         if (bmlen > 10)
4765                 goto xdr_error;
4766
4767         p = xdr_inline_decode(xdr, bmlen << 2);
4768         if (unlikely(!p))
4769                 goto out_overflow;
4770         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
4771         for (i = 0; i < savewords; ++i)
4772                 res->attrset[i] = be32_to_cpup(p++);
4773         for (; i < NFS4_BITMAP_SIZE; i++)
4774                 res->attrset[i] = 0;
4775
4776         return decode_delegation(xdr, res);
4777 xdr_error:
4778         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
4779         return -EIO;
4780 out_overflow:
4781         print_overflow_msg(__func__, xdr);
4782         return -EIO;
4783 }
4784
4785 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
4786 {
4787         int status;
4788
4789         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
4790         if (status != -EIO)
4791                 nfs_increment_open_seqid(status, res->seqid);
4792         if (!status)
4793                 status = decode_stateid(xdr, &res->stateid);
4794         return status;
4795 }
4796
4797 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
4798 {
4799         int status;
4800
4801         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
4802         if (status != -EIO)
4803                 nfs_increment_open_seqid(status, res->seqid);
4804         if (!status)
4805                 status = decode_stateid(xdr, &res->stateid);
4806         return status;
4807 }
4808
4809 static int decode_putfh(struct xdr_stream *xdr)
4810 {
4811         return decode_op_hdr(xdr, OP_PUTFH);
4812 }
4813
4814 static int decode_putrootfh(struct xdr_stream *xdr)
4815 {
4816         return decode_op_hdr(xdr, OP_PUTROOTFH);
4817 }
4818
4819 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
4820 {
4821         struct kvec *iov = req->rq_rcv_buf.head;
4822         __be32 *p;
4823         uint32_t count, eof, recvd, hdrlen;
4824         int status;
4825
4826         status = decode_op_hdr(xdr, OP_READ);
4827         if (status)
4828                 return status;
4829         p = xdr_inline_decode(xdr, 8);
4830         if (unlikely(!p))
4831                 goto out_overflow;
4832         eof = be32_to_cpup(p++);
4833         count = be32_to_cpup(p);
4834         hdrlen = (u8 *) xdr->p - (u8 *) iov->iov_base;
4835         recvd = req->rq_rcv_buf.len - hdrlen;
4836         if (count > recvd) {
4837                 dprintk("NFS: server cheating in read reply: "
4838                                 "count %u > recvd %u\n", count, recvd);
4839                 count = recvd;
4840                 eof = 0;
4841         }
4842         xdr_read_pages(xdr, count);
4843         res->eof = eof;
4844         res->count = count;
4845         return 0;
4846 out_overflow:
4847         print_overflow_msg(__func__, xdr);
4848         return -EIO;
4849 }
4850
4851 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
4852 {
4853         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
4854         struct kvec     *iov = rcvbuf->head;
4855         size_t          hdrlen;
4856         u32             recvd, pglen = rcvbuf->page_len;
4857         int             status;
4858         __be32          verf[2];
4859
4860         status = decode_op_hdr(xdr, OP_READDIR);
4861         if (!status)
4862                 status = decode_verifier(xdr, readdir->verifier.data);
4863         if (unlikely(status))
4864                 return status;
4865         memcpy(verf, readdir->verifier.data, sizeof(verf));
4866         dprintk("%s: verifier = %08x:%08x\n",
4867                         __func__, verf[0], verf[1]);
4868
4869         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4870         recvd = rcvbuf->len - hdrlen;
4871         if (pglen > recvd)
4872                 pglen = recvd;
4873         xdr_read_pages(xdr, pglen);
4874
4875
4876         return pglen;
4877 }
4878
4879 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
4880 {
4881         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4882         struct kvec *iov = rcvbuf->head;
4883         size_t hdrlen;
4884         u32 len, recvd;
4885         __be32 *p;
4886         int status;
4887
4888         status = decode_op_hdr(xdr, OP_READLINK);
4889         if (status)
4890                 return status;
4891
4892         /* Convert length of symlink */
4893         p = xdr_inline_decode(xdr, 4);
4894         if (unlikely(!p))
4895                 goto out_overflow;
4896         len = be32_to_cpup(p);
4897         if (len >= rcvbuf->page_len || len <= 0) {
4898                 dprintk("nfs: server returned giant symlink!\n");
4899                 return -ENAMETOOLONG;
4900         }
4901         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4902         recvd = req->rq_rcv_buf.len - hdrlen;
4903         if (recvd < len) {
4904                 dprintk("NFS: server cheating in readlink reply: "
4905                                 "count %u > recvd %u\n", len, recvd);
4906                 return -EIO;
4907         }
4908         xdr_read_pages(xdr, len);
4909         /*
4910          * The XDR encode routine has set things up so that
4911          * the link text will be copied directly into the
4912          * buffer.  We just have to do overflow-checking,
4913          * and and null-terminate the text (the VFS expects
4914          * null-termination).
4915          */
4916         xdr_terminate_string(rcvbuf, len);
4917         return 0;
4918 out_overflow:
4919         print_overflow_msg(__func__, xdr);
4920         return -EIO;
4921 }
4922
4923 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4924 {
4925         int status;
4926
4927         status = decode_op_hdr(xdr, OP_REMOVE);
4928         if (status)
4929                 goto out;
4930         status = decode_change_info(xdr, cinfo);
4931 out:
4932         return status;
4933 }
4934
4935 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
4936               struct nfs4_change_info *new_cinfo)
4937 {
4938         int status;
4939
4940         status = decode_op_hdr(xdr, OP_RENAME);
4941         if (status)
4942                 goto out;
4943         if ((status = decode_change_info(xdr, old_cinfo)))
4944                 goto out;
4945         status = decode_change_info(xdr, new_cinfo);
4946 out:
4947         return status;
4948 }
4949
4950 static int decode_renew(struct xdr_stream *xdr)
4951 {
4952         return decode_op_hdr(xdr, OP_RENEW);
4953 }
4954
4955 static int
4956 decode_restorefh(struct xdr_stream *xdr)
4957 {
4958         return decode_op_hdr(xdr, OP_RESTOREFH);
4959 }
4960
4961 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
4962                          struct nfs_getaclres *res)
4963 {
4964         __be32 *savep, *bm_p;
4965         uint32_t attrlen,
4966                  bitmap[3] = {0};
4967         struct kvec *iov = req->rq_rcv_buf.head;
4968         int status;
4969
4970         res->acl_len = 0;
4971         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4972                 goto out;
4973         bm_p = xdr->p;
4974         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4975                 goto out;
4976         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4977                 goto out;
4978
4979         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
4980                 return -EIO;
4981         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
4982                 size_t hdrlen;
4983                 u32 recvd;
4984
4985                 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
4986                  * are stored with the acl data to handle the problem of
4987                  * variable length bitmaps.*/
4988                 xdr->p = bm_p;
4989                 res->acl_data_offset = be32_to_cpup(bm_p) + 2;
4990                 res->acl_data_offset <<= 2;
4991
4992                 /* We ignore &savep and don't do consistency checks on
4993                  * the attr length.  Let userspace figure it out.... */
4994                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
4995                 attrlen += res->acl_data_offset;
4996                 recvd = req->rq_rcv_buf.len - hdrlen;
4997                 if (attrlen > recvd) {
4998                         if (res->acl_flags & NFS4_ACL_LEN_REQUEST) {
4999                                 /* getxattr interface called with a NULL buf */
5000                                 res->acl_len = attrlen;
5001                                 goto out;
5002                         }
5003                         dprintk("NFS: acl reply: attrlen %u > recvd %u\n",
5004                                         attrlen, recvd);
5005                         return -EINVAL;
5006                 }
5007                 xdr_read_pages(xdr, attrlen);
5008                 res->acl_len = attrlen;
5009         } else
5010                 status = -EOPNOTSUPP;
5011
5012 out:
5013         return status;
5014 }
5015
5016 static int
5017 decode_savefh(struct xdr_stream *xdr)
5018 {
5019         return decode_op_hdr(xdr, OP_SAVEFH);
5020 }
5021
5022 static int decode_setattr(struct xdr_stream *xdr)
5023 {
5024         __be32 *p;
5025         uint32_t bmlen;
5026         int status;
5027
5028         status = decode_op_hdr(xdr, OP_SETATTR);
5029         if (status)
5030                 return status;
5031         p = xdr_inline_decode(xdr, 4);
5032         if (unlikely(!p))
5033                 goto out_overflow;
5034         bmlen = be32_to_cpup(p);
5035         p = xdr_inline_decode(xdr, bmlen << 2);
5036         if (likely(p))
5037                 return 0;
5038 out_overflow:
5039         print_overflow_msg(__func__, xdr);
5040         return -EIO;
5041 }
5042
5043 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5044 {
5045         __be32 *p;
5046         uint32_t opnum;
5047         int32_t nfserr;
5048
5049         p = xdr_inline_decode(xdr, 8);
5050         if (unlikely(!p))
5051                 goto out_overflow;
5052         opnum = be32_to_cpup(p++);
5053         if (opnum != OP_SETCLIENTID) {
5054                 dprintk("nfs: decode_setclientid: Server returned operation"
5055                         " %d\n", opnum);
5056                 return -EIO;
5057         }
5058         nfserr = be32_to_cpup(p);
5059         if (nfserr == NFS_OK) {
5060                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5061                 if (unlikely(!p))
5062                         goto out_overflow;
5063                 p = xdr_decode_hyper(p, &res->clientid);
5064                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5065         } else if (nfserr == NFSERR_CLID_INUSE) {
5066                 uint32_t len;
5067
5068                 /* skip netid string */
5069                 p = xdr_inline_decode(xdr, 4);
5070                 if (unlikely(!p))
5071                         goto out_overflow;
5072                 len = be32_to_cpup(p);
5073                 p = xdr_inline_decode(xdr, len);
5074                 if (unlikely(!p))
5075                         goto out_overflow;
5076
5077                 /* skip uaddr string */
5078                 p = xdr_inline_decode(xdr, 4);
5079                 if (unlikely(!p))
5080                         goto out_overflow;
5081                 len = be32_to_cpup(p);
5082                 p = xdr_inline_decode(xdr, len);
5083                 if (unlikely(!p))
5084                         goto out_overflow;
5085                 return -NFSERR_CLID_INUSE;
5086         } else
5087                 return nfs4_stat_to_errno(nfserr);
5088
5089         return 0;
5090 out_overflow:
5091         print_overflow_msg(__func__, xdr);
5092         return -EIO;
5093 }
5094
5095 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5096 {
5097         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5098 }
5099
5100 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
5101 {
5102         __be32 *p;
5103         int status;
5104
5105         status = decode_op_hdr(xdr, OP_WRITE);
5106         if (status)
5107                 return status;
5108
5109         p = xdr_inline_decode(xdr, 16);
5110         if (unlikely(!p))
5111                 goto out_overflow;
5112         res->count = be32_to_cpup(p++);
5113         res->verf->committed = be32_to_cpup(p++);
5114         memcpy(res->verf->verifier, p, NFS4_VERIFIER_SIZE);
5115         return 0;
5116 out_overflow:
5117         print_overflow_msg(__func__, xdr);
5118         return -EIO;
5119 }
5120
5121 static int decode_delegreturn(struct xdr_stream *xdr)
5122 {
5123         return decode_op_hdr(xdr, OP_DELEGRETURN);
5124 }
5125
5126 static int decode_secinfo_gss(struct xdr_stream *xdr, struct nfs4_secinfo_flavor *flavor)
5127 {
5128         __be32 *p;
5129
5130         p = xdr_inline_decode(xdr, 4);
5131         if (unlikely(!p))
5132                 goto out_overflow;
5133         flavor->gss.sec_oid4.len = be32_to_cpup(p);
5134         if (flavor->gss.sec_oid4.len > GSS_OID_MAX_LEN)
5135                 goto out_err;
5136
5137         p = xdr_inline_decode(xdr, flavor->gss.sec_oid4.len);
5138         if (unlikely(!p))
5139                 goto out_overflow;
5140         memcpy(flavor->gss.sec_oid4.data, p, flavor->gss.sec_oid4.len);
5141
5142         p = xdr_inline_decode(xdr, 8);
5143         if (unlikely(!p))
5144                 goto out_overflow;
5145         flavor->gss.qop4 = be32_to_cpup(p++);
5146         flavor->gss.service = be32_to_cpup(p);
5147
5148         return 0;
5149
5150 out_overflow:
5151         print_overflow_msg(__func__, xdr);
5152         return -EIO;
5153 out_err:
5154         return -EINVAL;
5155 }
5156
5157 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5158 {
5159         struct nfs4_secinfo_flavor *sec_flavor;
5160         int status;
5161         __be32 *p;
5162         int i, num_flavors;
5163
5164         status = decode_op_hdr(xdr, OP_SECINFO);
5165         if (status)
5166                 goto out;
5167         p = xdr_inline_decode(xdr, 4);
5168         if (unlikely(!p))
5169                 goto out_overflow;
5170
5171         res->flavors->num_flavors = 0;
5172         num_flavors = be32_to_cpup(p);
5173
5174         for (i = 0; i < num_flavors; i++) {
5175                 sec_flavor = &res->flavors->flavors[i];
5176                 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5177                         break;
5178
5179                 p = xdr_inline_decode(xdr, 4);
5180                 if (unlikely(!p))
5181                         goto out_overflow;
5182                 sec_flavor->flavor = be32_to_cpup(p);
5183
5184                 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5185                         status = decode_secinfo_gss(xdr, sec_flavor);
5186                         if (status)
5187                                 goto out;
5188                 }
5189                 res->flavors->num_flavors++;
5190         }
5191
5192 out:
5193         return status;
5194 out_overflow:
5195         print_overflow_msg(__func__, xdr);
5196         return -EIO;
5197 }
5198
5199 #if defined(CONFIG_NFS_V4_1)
5200 static int decode_exchange_id(struct xdr_stream *xdr,
5201                               struct nfs41_exchange_id_res *res)
5202 {
5203         __be32 *p;
5204         uint32_t dummy;
5205         char *dummy_str;
5206         int status;
5207         struct nfs_client *clp = res->client;
5208         uint32_t impl_id_count;
5209
5210         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5211         if (status)
5212                 return status;
5213
5214         p = xdr_inline_decode(xdr, 8);
5215         if (unlikely(!p))
5216                 goto out_overflow;
5217         xdr_decode_hyper(p, &clp->cl_clientid);
5218         p = xdr_inline_decode(xdr, 12);
5219         if (unlikely(!p))
5220                 goto out_overflow;
5221         clp->cl_seqid = be32_to_cpup(p++);
5222         clp->cl_exchange_flags = be32_to_cpup(p++);
5223
5224         /* We ask for SP4_NONE */
5225         dummy = be32_to_cpup(p);
5226         if (dummy != SP4_NONE)
5227                 return -EIO;
5228
5229         /* Throw away minor_id */
5230         p = xdr_inline_decode(xdr, 8);
5231         if (unlikely(!p))
5232                 goto out_overflow;
5233
5234         /* Throw away Major id */
5235         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5236         if (unlikely(status))
5237                 return status;
5238
5239         /* Save server_scope */
5240         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5241         if (unlikely(status))
5242                 return status;
5243
5244         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5245                 return -EIO;
5246
5247         memcpy(res->server_scope->server_scope, dummy_str, dummy);
5248         res->server_scope->server_scope_sz = dummy;
5249
5250         /* Implementation Id */
5251         p = xdr_inline_decode(xdr, 4);
5252         if (unlikely(!p))
5253                 goto out_overflow;
5254         impl_id_count = be32_to_cpup(p++);
5255
5256         if (impl_id_count) {
5257                 /* nii_domain */
5258                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5259                 if (unlikely(status))
5260                         return status;
5261                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5262                         return -EIO;
5263                 memcpy(res->impl_id->domain, dummy_str, dummy);
5264
5265                 /* nii_name */
5266                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5267                 if (unlikely(status))
5268                         return status;
5269                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5270                         return -EIO;
5271                 memcpy(res->impl_id->name, dummy_str, dummy);
5272
5273                 /* nii_date */
5274                 p = xdr_inline_decode(xdr, 12);
5275                 if (unlikely(!p))
5276                         goto out_overflow;
5277                 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5278                 res->impl_id->date.nseconds = be32_to_cpup(p);
5279
5280                 /* if there's more than one entry, ignore the rest */
5281         }
5282         return 0;
5283 out_overflow:
5284         print_overflow_msg(__func__, xdr);
5285         return -EIO;
5286 }
5287
5288 static int decode_chan_attrs(struct xdr_stream *xdr,
5289                              struct nfs4_channel_attrs *attrs)
5290 {
5291         __be32 *p;
5292         u32 nr_attrs, val;
5293
5294         p = xdr_inline_decode(xdr, 28);
5295         if (unlikely(!p))
5296                 goto out_overflow;
5297         val = be32_to_cpup(p++);        /* headerpadsz */
5298         if (val)
5299                 return -EINVAL;         /* no support for header padding yet */
5300         attrs->max_rqst_sz = be32_to_cpup(p++);
5301         attrs->max_resp_sz = be32_to_cpup(p++);
5302         attrs->max_resp_sz_cached = be32_to_cpup(p++);
5303         attrs->max_ops = be32_to_cpup(p++);
5304         attrs->max_reqs = be32_to_cpup(p++);
5305         nr_attrs = be32_to_cpup(p);
5306         if (unlikely(nr_attrs > 1)) {
5307                 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5308                         "count %u\n", __func__, nr_attrs);
5309                 return -EINVAL;
5310         }
5311         if (nr_attrs == 1) {
5312                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5313                 if (unlikely(!p))
5314                         goto out_overflow;
5315         }
5316         return 0;
5317 out_overflow:
5318         print_overflow_msg(__func__, xdr);
5319         return -EIO;
5320 }
5321
5322 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5323 {
5324         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5325 }
5326
5327 static int decode_create_session(struct xdr_stream *xdr,
5328                                  struct nfs41_create_session_res *res)
5329 {
5330         __be32 *p;
5331         int status;
5332         struct nfs_client *clp = res->client;
5333         struct nfs4_session *session = clp->cl_session;
5334
5335         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5336         if (!status)
5337                 status = decode_sessionid(xdr, &session->sess_id);
5338         if (unlikely(status))
5339                 return status;
5340
5341         /* seqid, flags */
5342         p = xdr_inline_decode(xdr, 8);
5343         if (unlikely(!p))
5344                 goto out_overflow;
5345         clp->cl_seqid = be32_to_cpup(p++);
5346         session->flags = be32_to_cpup(p);
5347
5348         /* Channel attributes */
5349         status = decode_chan_attrs(xdr, &session->fc_attrs);
5350         if (!status)
5351                 status = decode_chan_attrs(xdr, &session->bc_attrs);
5352         return status;
5353 out_overflow:
5354         print_overflow_msg(__func__, xdr);
5355         return -EIO;
5356 }
5357
5358 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5359 {
5360         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5361 }
5362
5363 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5364 {
5365         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5366 }
5367 #endif /* CONFIG_NFS_V4_1 */
5368
5369 static int decode_sequence(struct xdr_stream *xdr,
5370                            struct nfs4_sequence_res *res,
5371                            struct rpc_rqst *rqstp)
5372 {
5373 #if defined(CONFIG_NFS_V4_1)
5374         struct nfs4_sessionid id;
5375         u32 dummy;
5376         int status;
5377         __be32 *p;
5378
5379         if (!res->sr_session)
5380                 return 0;
5381
5382         status = decode_op_hdr(xdr, OP_SEQUENCE);
5383         if (!status)
5384                 status = decode_sessionid(xdr, &id);
5385         if (unlikely(status))
5386                 goto out_err;
5387
5388         /*
5389          * If the server returns different values for sessionID, slotID or
5390          * sequence number, the server is looney tunes.
5391          */
5392         status = -EREMOTEIO;
5393
5394         if (memcmp(id.data, res->sr_session->sess_id.data,
5395                    NFS4_MAX_SESSIONID_LEN)) {
5396                 dprintk("%s Invalid session id\n", __func__);
5397                 goto out_err;
5398         }
5399
5400         p = xdr_inline_decode(xdr, 20);
5401         if (unlikely(!p))
5402                 goto out_overflow;
5403
5404         /* seqid */
5405         dummy = be32_to_cpup(p++);
5406         if (dummy != res->sr_slot->seq_nr) {
5407                 dprintk("%s Invalid sequence number\n", __func__);
5408                 goto out_err;
5409         }
5410         /* slot id */
5411         dummy = be32_to_cpup(p++);
5412         if (dummy != res->sr_slot - res->sr_session->fc_slot_table.slots) {
5413                 dprintk("%s Invalid slot id\n", __func__);
5414                 goto out_err;
5415         }
5416         /* highest slot id - currently not processed */
5417         dummy = be32_to_cpup(p++);
5418         /* target highest slot id - currently not processed */
5419         dummy = be32_to_cpup(p++);
5420         /* result flags */
5421         res->sr_status_flags = be32_to_cpup(p);
5422         status = 0;
5423 out_err:
5424         res->sr_status = status;
5425         return status;
5426 out_overflow:
5427         print_overflow_msg(__func__, xdr);
5428         status = -EIO;
5429         goto out_err;
5430 #else  /* CONFIG_NFS_V4_1 */
5431         return 0;
5432 #endif /* CONFIG_NFS_V4_1 */
5433 }
5434
5435 #if defined(CONFIG_NFS_V4_1)
5436 /*
5437  * TODO: Need to handle case when EOF != true;
5438  */
5439 static int decode_getdevicelist(struct xdr_stream *xdr,
5440                                 struct pnfs_devicelist *res)
5441 {
5442         __be32 *p;
5443         int status, i;
5444         struct nfs_writeverf verftemp;
5445
5446         status = decode_op_hdr(xdr, OP_GETDEVICELIST);
5447         if (status)
5448                 return status;
5449
5450         p = xdr_inline_decode(xdr, 8 + 8 + 4);
5451         if (unlikely(!p))
5452                 goto out_overflow;
5453
5454         /* TODO: Skip cookie for now */
5455         p += 2;
5456
5457         /* Read verifier */
5458         p = xdr_decode_opaque_fixed(p, verftemp.verifier, NFS4_VERIFIER_SIZE);
5459
5460         res->num_devs = be32_to_cpup(p);
5461
5462         dprintk("%s: num_dev %d\n", __func__, res->num_devs);
5463
5464         if (res->num_devs > NFS4_PNFS_GETDEVLIST_MAXNUM) {
5465                 printk(KERN_ERR "NFS: %s too many result dev_num %u\n",
5466                                 __func__, res->num_devs);
5467                 return -EIO;
5468         }
5469
5470         p = xdr_inline_decode(xdr,
5471                               res->num_devs * NFS4_DEVICEID4_SIZE + 4);
5472         if (unlikely(!p))
5473                 goto out_overflow;
5474         for (i = 0; i < res->num_devs; i++)
5475                 p = xdr_decode_opaque_fixed(p, res->dev_id[i].data,
5476                                             NFS4_DEVICEID4_SIZE);
5477         res->eof = be32_to_cpup(p);
5478         return 0;
5479 out_overflow:
5480         print_overflow_msg(__func__, xdr);
5481         return -EIO;
5482 }
5483
5484 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5485                                 struct pnfs_device *pdev)
5486 {
5487         __be32 *p;
5488         uint32_t len, type;
5489         int status;
5490
5491         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5492         if (status) {
5493                 if (status == -ETOOSMALL) {
5494                         p = xdr_inline_decode(xdr, 4);
5495                         if (unlikely(!p))
5496                                 goto out_overflow;
5497                         pdev->mincount = be32_to_cpup(p);
5498                         dprintk("%s: Min count too small. mincnt = %u\n",
5499                                 __func__, pdev->mincount);
5500                 }
5501                 return status;
5502         }
5503
5504         p = xdr_inline_decode(xdr, 8);
5505         if (unlikely(!p))
5506                 goto out_overflow;
5507         type = be32_to_cpup(p++);
5508         if (type != pdev->layout_type) {
5509                 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5510                         __func__, pdev->layout_type, type);
5511                 return -EINVAL;
5512         }
5513         /*
5514          * Get the length of the opaque device_addr4. xdr_read_pages places
5515          * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5516          * and places the remaining xdr data in xdr_buf->tail
5517          */
5518         pdev->mincount = be32_to_cpup(p);
5519         xdr_read_pages(xdr, pdev->mincount); /* include space for the length */
5520
5521         /* Parse notification bitmap, verifying that it is zero. */
5522         p = xdr_inline_decode(xdr, 4);
5523         if (unlikely(!p))
5524                 goto out_overflow;
5525         len = be32_to_cpup(p);
5526         if (len) {
5527                 uint32_t i;
5528
5529                 p = xdr_inline_decode(xdr, 4 * len);
5530                 if (unlikely(!p))
5531                         goto out_overflow;
5532                 for (i = 0; i < len; i++, p++) {
5533                         if (be32_to_cpup(p)) {
5534                                 dprintk("%s: notifications not supported\n",
5535                                         __func__);
5536                                 return -EIO;
5537                         }
5538                 }
5539         }
5540         return 0;
5541 out_overflow:
5542         print_overflow_msg(__func__, xdr);
5543         return -EIO;
5544 }
5545
5546 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5547                             struct nfs4_layoutget_res *res)
5548 {
5549         __be32 *p;
5550         int status;
5551         u32 layout_count;
5552         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5553         struct kvec *iov = rcvbuf->head;
5554         u32 hdrlen, recvd;
5555
5556         status = decode_op_hdr(xdr, OP_LAYOUTGET);
5557         if (status)
5558                 return status;
5559         p = xdr_inline_decode(xdr, 4);
5560         if (unlikely(!p))
5561                 goto out_overflow;
5562         res->return_on_close = be32_to_cpup(p);
5563         decode_stateid(xdr, &res->stateid);
5564         p = xdr_inline_decode(xdr, 4);
5565         if (unlikely(!p))
5566                 goto out_overflow;
5567         layout_count = be32_to_cpup(p);
5568         if (!layout_count) {
5569                 dprintk("%s: server responded with empty layout array\n",
5570                         __func__);
5571                 return -EINVAL;
5572         }
5573
5574         p = xdr_inline_decode(xdr, 28);
5575         if (unlikely(!p))
5576                 goto out_overflow;
5577         p = xdr_decode_hyper(p, &res->range.offset);
5578         p = xdr_decode_hyper(p, &res->range.length);
5579         res->range.iomode = be32_to_cpup(p++);
5580         res->type = be32_to_cpup(p++);
5581         res->layoutp->len = be32_to_cpup(p);
5582
5583         dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5584                 __func__,
5585                 (unsigned long)res->range.offset,
5586                 (unsigned long)res->range.length,
5587                 res->range.iomode,
5588                 res->type,
5589                 res->layoutp->len);
5590
5591         hdrlen = (u8 *) xdr->p - (u8 *) iov->iov_base;
5592         recvd = req->rq_rcv_buf.len - hdrlen;
5593         if (res->layoutp->len > recvd) {
5594                 dprintk("NFS: server cheating in layoutget reply: "
5595                                 "layout len %u > recvd %u\n",
5596                                 res->layoutp->len, recvd);
5597                 return -EINVAL;
5598         }
5599
5600         xdr_read_pages(xdr, res->layoutp->len);
5601
5602         if (layout_count > 1) {
5603                 /* We only handle a length one array at the moment.  Any
5604                  * further entries are just ignored.  Note that this means
5605                  * the client may see a response that is less than the
5606                  * minimum it requested.
5607                  */
5608                 dprintk("%s: server responded with %d layouts, dropping tail\n",
5609                         __func__, layout_count);
5610         }
5611
5612         return 0;
5613 out_overflow:
5614         print_overflow_msg(__func__, xdr);
5615         return -EIO;
5616 }
5617
5618 static int decode_layoutreturn(struct xdr_stream *xdr,
5619                                struct nfs4_layoutreturn_res *res)
5620 {
5621         __be32 *p;
5622         int status;
5623
5624         status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5625         if (status)
5626                 return status;
5627         p = xdr_inline_decode(xdr, 4);
5628         if (unlikely(!p))
5629                 goto out_overflow;
5630         res->lrs_present = be32_to_cpup(p);
5631         if (res->lrs_present)
5632                 status = decode_stateid(xdr, &res->stateid);
5633         return status;
5634 out_overflow:
5635         print_overflow_msg(__func__, xdr);
5636         return -EIO;
5637 }
5638
5639 static int decode_layoutcommit(struct xdr_stream *xdr,
5640                                struct rpc_rqst *req,
5641                                struct nfs4_layoutcommit_res *res)
5642 {
5643         __be32 *p;
5644         __u32 sizechanged;
5645         int status;
5646
5647         status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5648         res->status = status;
5649         if (status)
5650                 return status;
5651
5652         p = xdr_inline_decode(xdr, 4);
5653         if (unlikely(!p))
5654                 goto out_overflow;
5655         sizechanged = be32_to_cpup(p);
5656
5657         if (sizechanged) {
5658                 /* throw away new size */
5659                 p = xdr_inline_decode(xdr, 8);
5660                 if (unlikely(!p))
5661                         goto out_overflow;
5662         }
5663         return 0;
5664 out_overflow:
5665         print_overflow_msg(__func__, xdr);
5666         return -EIO;
5667 }
5668
5669 static int decode_test_stateid(struct xdr_stream *xdr,
5670                                struct nfs41_test_stateid_res *res)
5671 {
5672         __be32 *p;
5673         int status;
5674         int num_res;
5675
5676         status = decode_op_hdr(xdr, OP_TEST_STATEID);
5677         if (status)
5678                 return status;
5679
5680         p = xdr_inline_decode(xdr, 4);
5681         if (unlikely(!p))
5682                 goto out_overflow;
5683         num_res = be32_to_cpup(p++);
5684         if (num_res != 1)
5685                 goto out;
5686
5687         p = xdr_inline_decode(xdr, 4);
5688         if (unlikely(!p))
5689                 goto out_overflow;
5690         res->status = be32_to_cpup(p++);
5691
5692         return status;
5693 out_overflow:
5694         print_overflow_msg(__func__, xdr);
5695 out:
5696         return -EIO;
5697 }
5698
5699 static int decode_free_stateid(struct xdr_stream *xdr,
5700                                struct nfs41_free_stateid_res *res)
5701 {
5702         __be32 *p;
5703         int status;
5704
5705         status = decode_op_hdr(xdr, OP_FREE_STATEID);
5706         if (status)
5707                 return status;
5708
5709         p = xdr_inline_decode(xdr, 4);
5710         if (unlikely(!p))
5711                 goto out_overflow;
5712         res->status = be32_to_cpup(p++);
5713         return res->status;
5714 out_overflow:
5715         print_overflow_msg(__func__, xdr);
5716         return -EIO;
5717 }
5718 #endif /* CONFIG_NFS_V4_1 */
5719
5720 /*
5721  * END OF "GENERIC" DECODE ROUTINES.
5722  */
5723
5724 /*
5725  * Decode OPEN_DOWNGRADE response
5726  */
5727 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
5728                                        struct xdr_stream *xdr,
5729                                        struct nfs_closeres *res)
5730 {
5731         struct compound_hdr hdr;
5732         int status;
5733
5734         status = decode_compound_hdr(xdr, &hdr);
5735         if (status)
5736                 goto out;
5737         status = decode_sequence(xdr, &res->seq_res, rqstp);
5738         if (status)
5739                 goto out;
5740         status = decode_putfh(xdr);
5741         if (status)
5742                 goto out;
5743         status = decode_open_downgrade(xdr, res);
5744         if (status != 0)
5745                 goto out;
5746         decode_getfattr(xdr, res->fattr, res->server);
5747 out:
5748         return status;
5749 }
5750
5751 /*
5752  * Decode ACCESS response
5753  */
5754 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5755                                struct nfs4_accessres *res)
5756 {
5757         struct compound_hdr hdr;
5758         int status;
5759
5760         status = decode_compound_hdr(xdr, &hdr);
5761         if (status)
5762                 goto out;
5763         status = decode_sequence(xdr, &res->seq_res, rqstp);
5764         if (status)
5765                 goto out;
5766         status = decode_putfh(xdr);
5767         if (status != 0)
5768                 goto out;
5769         status = decode_access(xdr, res);
5770         if (status != 0)
5771                 goto out;
5772         decode_getfattr(xdr, res->fattr, res->server);
5773 out:
5774         return status;
5775 }
5776
5777 /*
5778  * Decode LOOKUP response
5779  */
5780 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, 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_putfh(xdr);
5793         if (status)
5794                 goto out;
5795         status = decode_lookup(xdr);
5796         if (status)
5797                 goto out;
5798         status = decode_getfh(xdr, res->fh);
5799         if (status)
5800                 goto out;
5801         status = decode_getfattr(xdr, res->fattr, res->server);
5802 out:
5803         return status;
5804 }
5805
5806 /*
5807  * Decode LOOKUP_ROOT response
5808  */
5809 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
5810                                     struct xdr_stream *xdr,
5811                                     struct nfs4_lookup_res *res)
5812 {
5813         struct compound_hdr hdr;
5814         int status;
5815
5816         status = decode_compound_hdr(xdr, &hdr);
5817         if (status)
5818                 goto out;
5819         status = decode_sequence(xdr, &res->seq_res, rqstp);
5820         if (status)
5821                 goto out;
5822         status = decode_putrootfh(xdr);
5823         if (status)
5824                 goto out;
5825         status = decode_getfh(xdr, res->fh);
5826         if (status == 0)
5827                 status = decode_getfattr(xdr, res->fattr, res->server);
5828 out:
5829         return status;
5830 }
5831
5832 /*
5833  * Decode REMOVE response
5834  */
5835 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5836                                struct nfs_removeres *res)
5837 {
5838         struct compound_hdr hdr;
5839         int status;
5840
5841         status = decode_compound_hdr(xdr, &hdr);
5842         if (status)
5843                 goto out;
5844         status = decode_sequence(xdr, &res->seq_res, rqstp);
5845         if (status)
5846                 goto out;
5847         status = decode_putfh(xdr);
5848         if (status)
5849                 goto out;
5850         status = decode_remove(xdr, &res->cinfo);
5851         if (status)
5852                 goto out;
5853         decode_getfattr(xdr, res->dir_attr, res->server);
5854 out:
5855         return status;
5856 }
5857
5858 /*
5859  * Decode RENAME response
5860  */
5861 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5862                                struct nfs_renameres *res)
5863 {
5864         struct compound_hdr hdr;
5865         int status;
5866
5867         status = decode_compound_hdr(xdr, &hdr);
5868         if (status)
5869                 goto out;
5870         status = decode_sequence(xdr, &res->seq_res, rqstp);
5871         if (status)
5872                 goto out;
5873         status = decode_putfh(xdr);
5874         if (status)
5875                 goto out;
5876         status = decode_savefh(xdr);
5877         if (status)
5878                 goto out;
5879         status = decode_putfh(xdr);
5880         if (status)
5881                 goto out;
5882         status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
5883         if (status)
5884                 goto out;
5885         /* Current FH is target directory */
5886         if (decode_getfattr(xdr, res->new_fattr, res->server))
5887                 goto out;
5888         status = decode_restorefh(xdr);
5889         if (status)
5890                 goto out;
5891         decode_getfattr(xdr, res->old_fattr, res->server);
5892 out:
5893         return status;
5894 }
5895
5896 /*
5897  * Decode LINK response
5898  */
5899 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5900                              struct nfs4_link_res *res)
5901 {
5902         struct compound_hdr hdr;
5903         int status;
5904
5905         status = decode_compound_hdr(xdr, &hdr);
5906         if (status)
5907                 goto out;
5908         status = decode_sequence(xdr, &res->seq_res, rqstp);
5909         if (status)
5910                 goto out;
5911         status = decode_putfh(xdr);
5912         if (status)
5913                 goto out;
5914         status = decode_savefh(xdr);
5915         if (status)
5916                 goto out;
5917         status = decode_putfh(xdr);
5918         if (status)
5919                 goto out;
5920         status = decode_link(xdr, &res->cinfo);
5921         if (status)
5922                 goto out;
5923         /*
5924          * Note order: OP_LINK leaves the directory as the current
5925          *             filehandle.
5926          */
5927         if (decode_getfattr(xdr, res->dir_attr, res->server))
5928                 goto out;
5929         status = decode_restorefh(xdr);
5930         if (status)
5931                 goto out;
5932         decode_getfattr(xdr, res->fattr, res->server);
5933 out:
5934         return status;
5935 }
5936
5937 /*
5938  * Decode CREATE response
5939  */
5940 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5941                                struct nfs4_create_res *res)
5942 {
5943         struct compound_hdr hdr;
5944         int status;
5945
5946         status = decode_compound_hdr(xdr, &hdr);
5947         if (status)
5948                 goto out;
5949         status = decode_sequence(xdr, &res->seq_res, rqstp);
5950         if (status)
5951                 goto out;
5952         status = decode_putfh(xdr);
5953         if (status)
5954                 goto out;
5955         status = decode_savefh(xdr);
5956         if (status)
5957                 goto out;
5958         status = decode_create(xdr, &res->dir_cinfo);
5959         if (status)
5960                 goto out;
5961         status = decode_getfh(xdr, res->fh);
5962         if (status)
5963                 goto out;
5964         if (decode_getfattr(xdr, res->fattr, res->server))
5965                 goto out;
5966         status = decode_restorefh(xdr);
5967         if (status)
5968                 goto out;
5969         decode_getfattr(xdr, res->dir_fattr, res->server);
5970 out:
5971         return status;
5972 }
5973
5974 /*
5975  * Decode SYMLINK response
5976  */
5977 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5978                                 struct nfs4_create_res *res)
5979 {
5980         return nfs4_xdr_dec_create(rqstp, xdr, res);
5981 }
5982
5983 /*
5984  * Decode GETATTR response
5985  */
5986 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5987                                 struct nfs4_getattr_res *res)
5988 {
5989         struct compound_hdr hdr;
5990         int status;
5991
5992         status = decode_compound_hdr(xdr, &hdr);
5993         if (status)
5994                 goto out;
5995         status = decode_sequence(xdr, &res->seq_res, rqstp);
5996         if (status)
5997                 goto out;
5998         status = decode_putfh(xdr);
5999         if (status)
6000                 goto out;
6001         status = decode_getfattr(xdr, res->fattr, res->server);
6002 out:
6003         return status;
6004 }
6005
6006 /*
6007  * Encode an SETACL request
6008  */
6009 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6010                                 struct nfs_setaclargs *args)
6011 {
6012         struct compound_hdr hdr = {
6013                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6014         };
6015
6016         encode_compound_hdr(xdr, req, &hdr);
6017         encode_sequence(xdr, &args->seq_args, &hdr);
6018         encode_putfh(xdr, args->fh, &hdr);
6019         encode_setacl(xdr, args, &hdr);
6020         encode_nops(&hdr);
6021 }
6022
6023 /*
6024  * Decode SETACL response
6025  */
6026 static int
6027 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6028                     struct nfs_setaclres *res)
6029 {
6030         struct compound_hdr hdr;
6031         int status;
6032
6033         status = decode_compound_hdr(xdr, &hdr);
6034         if (status)
6035                 goto out;
6036         status = decode_sequence(xdr, &res->seq_res, rqstp);
6037         if (status)
6038                 goto out;
6039         status = decode_putfh(xdr);
6040         if (status)
6041                 goto out;
6042         status = decode_setattr(xdr);
6043 out:
6044         return status;
6045 }
6046
6047 /*
6048  * Decode GETACL response
6049  */
6050 static int
6051 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6052                     struct nfs_getaclres *res)
6053 {
6054         struct compound_hdr hdr;
6055         int status;
6056
6057         if (res->acl_scratch != NULL) {
6058                 void *p = page_address(res->acl_scratch);
6059                 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6060         }
6061         status = decode_compound_hdr(xdr, &hdr);
6062         if (status)
6063                 goto out;
6064         status = decode_sequence(xdr, &res->seq_res, rqstp);
6065         if (status)
6066                 goto out;
6067         status = decode_putfh(xdr);
6068         if (status)
6069                 goto out;
6070         status = decode_getacl(xdr, rqstp, res);
6071
6072 out:
6073         return status;
6074 }
6075
6076 /*
6077  * Decode CLOSE response
6078  */
6079 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6080                               struct nfs_closeres *res)
6081 {
6082         struct compound_hdr hdr;
6083         int status;
6084
6085         status = decode_compound_hdr(xdr, &hdr);
6086         if (status)
6087                 goto out;
6088         status = decode_sequence(xdr, &res->seq_res, rqstp);
6089         if (status)
6090                 goto out;
6091         status = decode_putfh(xdr);
6092         if (status)
6093                 goto out;
6094         status = decode_close(xdr, res);
6095         if (status != 0)
6096                 goto out;
6097         /*
6098          * Note: Server may do delete on close for this file
6099          *      in which case the getattr call will fail with
6100          *      an ESTALE error. Shouldn't be a problem,
6101          *      though, since fattr->valid will remain unset.
6102          */
6103         decode_getfattr(xdr, res->fattr, res->server);
6104 out:
6105         return status;
6106 }
6107
6108 /*
6109  * Decode OPEN response
6110  */
6111 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6112                              struct nfs_openres *res)
6113 {
6114         struct compound_hdr hdr;
6115         int status;
6116
6117         status = decode_compound_hdr(xdr, &hdr);
6118         if (status)
6119                 goto out;
6120         status = decode_sequence(xdr, &res->seq_res, rqstp);
6121         if (status)
6122                 goto out;
6123         status = decode_putfh(xdr);
6124         if (status)
6125                 goto out;
6126         status = decode_savefh(xdr);
6127         if (status)
6128                 goto out;
6129         status = decode_open(xdr, res);
6130         if (status)
6131                 goto out;
6132         if (decode_getfh(xdr, &res->fh) != 0)
6133                 goto out;
6134         if (decode_getfattr(xdr, res->f_attr, res->server) != 0)
6135                 goto out;
6136         if (decode_restorefh(xdr) != 0)
6137                 goto out;
6138         decode_getfattr(xdr, res->dir_attr, res->server);
6139 out:
6140         return status;
6141 }
6142
6143 /*
6144  * Decode OPEN_CONFIRM response
6145  */
6146 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6147                                      struct xdr_stream *xdr,
6148                                      struct nfs_open_confirmres *res)
6149 {
6150         struct compound_hdr hdr;
6151         int status;
6152
6153         status = decode_compound_hdr(xdr, &hdr);
6154         if (status)
6155                 goto out;
6156         status = decode_putfh(xdr);
6157         if (status)
6158                 goto out;
6159         status = decode_open_confirm(xdr, res);
6160 out:
6161         return status;
6162 }
6163
6164 /*
6165  * Decode OPEN response
6166  */
6167 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6168                                     struct xdr_stream *xdr,
6169                                     struct nfs_openres *res)
6170 {
6171         struct compound_hdr hdr;
6172         int status;
6173
6174         status = decode_compound_hdr(xdr, &hdr);
6175         if (status)
6176                 goto out;
6177         status = decode_sequence(xdr, &res->seq_res, rqstp);
6178         if (status)
6179                 goto out;
6180         status = decode_putfh(xdr);
6181         if (status)
6182                 goto out;
6183         status = decode_open(xdr, res);
6184         if (status)
6185                 goto out;
6186         decode_getfattr(xdr, res->f_attr, res->server);
6187 out:
6188         return status;
6189 }
6190
6191 /*
6192  * Decode SETATTR response
6193  */
6194 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6195                                 struct xdr_stream *xdr,
6196                                 struct nfs_setattrres *res)
6197 {
6198         struct compound_hdr hdr;
6199         int status;
6200
6201         status = decode_compound_hdr(xdr, &hdr);
6202         if (status)
6203                 goto out;
6204         status = decode_sequence(xdr, &res->seq_res, rqstp);
6205         if (status)
6206                 goto out;
6207         status = decode_putfh(xdr);
6208         if (status)
6209                 goto out;
6210         status = decode_setattr(xdr);
6211         if (status)
6212                 goto out;
6213         decode_getfattr(xdr, res->fattr, res->server);
6214 out:
6215         return status;
6216 }
6217
6218 /*
6219  * Decode LOCK response
6220  */
6221 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6222                              struct nfs_lock_res *res)
6223 {
6224         struct compound_hdr hdr;
6225         int status;
6226
6227         status = decode_compound_hdr(xdr, &hdr);
6228         if (status)
6229                 goto out;
6230         status = decode_sequence(xdr, &res->seq_res, rqstp);
6231         if (status)
6232                 goto out;
6233         status = decode_putfh(xdr);
6234         if (status)
6235                 goto out;
6236         status = decode_lock(xdr, res);
6237 out:
6238         return status;
6239 }
6240
6241 /*
6242  * Decode LOCKT response
6243  */
6244 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6245                               struct nfs_lockt_res *res)
6246 {
6247         struct compound_hdr hdr;
6248         int status;
6249
6250         status = decode_compound_hdr(xdr, &hdr);
6251         if (status)
6252                 goto out;
6253         status = decode_sequence(xdr, &res->seq_res, rqstp);
6254         if (status)
6255                 goto out;
6256         status = decode_putfh(xdr);
6257         if (status)
6258                 goto out;
6259         status = decode_lockt(xdr, res);
6260 out:
6261         return status;
6262 }
6263
6264 /*
6265  * Decode LOCKU response
6266  */
6267 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6268                               struct nfs_locku_res *res)
6269 {
6270         struct compound_hdr hdr;
6271         int status;
6272
6273         status = decode_compound_hdr(xdr, &hdr);
6274         if (status)
6275                 goto out;
6276         status = decode_sequence(xdr, &res->seq_res, rqstp);
6277         if (status)
6278                 goto out;
6279         status = decode_putfh(xdr);
6280         if (status)
6281                 goto out;
6282         status = decode_locku(xdr, res);
6283 out:
6284         return status;
6285 }
6286
6287 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6288                                           struct xdr_stream *xdr, void *dummy)
6289 {
6290         struct compound_hdr hdr;
6291         int status;
6292
6293         status = decode_compound_hdr(xdr, &hdr);
6294         if (!status)
6295                 status = decode_release_lockowner(xdr);
6296         return status;
6297 }
6298
6299 /*
6300  * Decode READLINK response
6301  */
6302 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6303                                  struct xdr_stream *xdr,
6304                                  struct nfs4_readlink_res *res)
6305 {
6306         struct compound_hdr hdr;
6307         int status;
6308
6309         status = decode_compound_hdr(xdr, &hdr);
6310         if (status)
6311                 goto out;
6312         status = decode_sequence(xdr, &res->seq_res, rqstp);
6313         if (status)
6314                 goto out;
6315         status = decode_putfh(xdr);
6316         if (status)
6317                 goto out;
6318         status = decode_readlink(xdr, rqstp);
6319 out:
6320         return status;
6321 }
6322
6323 /*
6324  * Decode READDIR response
6325  */
6326 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6327                                 struct nfs4_readdir_res *res)
6328 {
6329         struct compound_hdr hdr;
6330         int status;
6331
6332         status = decode_compound_hdr(xdr, &hdr);
6333         if (status)
6334                 goto out;
6335         status = decode_sequence(xdr, &res->seq_res, rqstp);
6336         if (status)
6337                 goto out;
6338         status = decode_putfh(xdr);
6339         if (status)
6340                 goto out;
6341         status = decode_readdir(xdr, rqstp, res);
6342 out:
6343         return status;
6344 }
6345
6346 /*
6347  * Decode Read response
6348  */
6349 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6350                              struct nfs_readres *res)
6351 {
6352         struct compound_hdr hdr;
6353         int status;
6354
6355         status = decode_compound_hdr(xdr, &hdr);
6356         if (status)
6357                 goto out;
6358         status = decode_sequence(xdr, &res->seq_res, rqstp);
6359         if (status)
6360                 goto out;
6361         status = decode_putfh(xdr);
6362         if (status)
6363                 goto out;
6364         status = decode_read(xdr, rqstp, res);
6365         if (!status)
6366                 status = res->count;
6367 out:
6368         return status;
6369 }
6370
6371 /*
6372  * Decode WRITE response
6373  */
6374 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6375                               struct nfs_writeres *res)
6376 {
6377         struct compound_hdr hdr;
6378         int status;
6379
6380         status = decode_compound_hdr(xdr, &hdr);
6381         if (status)
6382                 goto out;
6383         status = decode_sequence(xdr, &res->seq_res, rqstp);
6384         if (status)
6385                 goto out;
6386         status = decode_putfh(xdr);
6387         if (status)
6388                 goto out;
6389         status = decode_write(xdr, res);
6390         if (status)
6391                 goto out;
6392         if (res->fattr)
6393                 decode_getfattr(xdr, res->fattr, res->server);
6394         if (!status)
6395                 status = res->count;
6396 out:
6397         return status;
6398 }
6399
6400 /*
6401  * Decode COMMIT response
6402  */
6403 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6404                                struct nfs_writeres *res)
6405 {
6406         struct compound_hdr hdr;
6407         int status;
6408
6409         status = decode_compound_hdr(xdr, &hdr);
6410         if (status)
6411                 goto out;
6412         status = decode_sequence(xdr, &res->seq_res, rqstp);
6413         if (status)
6414                 goto out;
6415         status = decode_putfh(xdr);
6416         if (status)
6417                 goto out;
6418         status = decode_commit(xdr, res);
6419         if (status)
6420                 goto out;
6421         if (res->fattr)
6422                 decode_getfattr(xdr, res->fattr, res->server);
6423 out:
6424         return status;
6425 }
6426
6427 /*
6428  * Decode FSINFO response
6429  */
6430 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6431                                struct nfs4_fsinfo_res *res)
6432 {
6433         struct compound_hdr hdr;
6434         int status;
6435
6436         status = decode_compound_hdr(xdr, &hdr);
6437         if (!status)
6438                 status = decode_sequence(xdr, &res->seq_res, req);
6439         if (!status)
6440                 status = decode_putfh(xdr);
6441         if (!status)
6442                 status = decode_fsinfo(xdr, res->fsinfo);
6443         return status;
6444 }
6445
6446 /*
6447  * Decode PATHCONF response
6448  */
6449 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6450                                  struct nfs4_pathconf_res *res)
6451 {
6452         struct compound_hdr hdr;
6453         int status;
6454
6455         status = decode_compound_hdr(xdr, &hdr);
6456         if (!status)
6457                 status = decode_sequence(xdr, &res->seq_res, req);
6458         if (!status)
6459                 status = decode_putfh(xdr);
6460         if (!status)
6461                 status = decode_pathconf(xdr, res->pathconf);
6462         return status;
6463 }
6464
6465 /*
6466  * Decode STATFS response
6467  */
6468 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6469                                struct nfs4_statfs_res *res)
6470 {
6471         struct compound_hdr hdr;
6472         int status;
6473
6474         status = decode_compound_hdr(xdr, &hdr);
6475         if (!status)
6476                 status = decode_sequence(xdr, &res->seq_res, req);
6477         if (!status)
6478                 status = decode_putfh(xdr);
6479         if (!status)
6480                 status = decode_statfs(xdr, res->fsstat);
6481         return status;
6482 }
6483
6484 /*
6485  * Decode GETATTR_BITMAP response
6486  */
6487 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6488                                     struct xdr_stream *xdr,
6489                                     struct nfs4_server_caps_res *res)
6490 {
6491         struct compound_hdr hdr;
6492         int status;
6493
6494         status = decode_compound_hdr(xdr, &hdr);
6495         if (status)
6496                 goto out;
6497         status = decode_sequence(xdr, &res->seq_res, req);
6498         if (status)
6499                 goto out;
6500         status = decode_putfh(xdr);
6501         if (status)
6502                 goto out;
6503         status = decode_server_caps(xdr, res);
6504 out:
6505         return status;
6506 }
6507
6508 /*
6509  * Decode RENEW response
6510  */
6511 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6512                               void *__unused)
6513 {
6514         struct compound_hdr hdr;
6515         int status;
6516
6517         status = decode_compound_hdr(xdr, &hdr);
6518         if (!status)
6519                 status = decode_renew(xdr);
6520         return status;
6521 }
6522
6523 /*
6524  * Decode SETCLIENTID response
6525  */
6526 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6527                                     struct xdr_stream *xdr,
6528                                     struct nfs4_setclientid_res *res)
6529 {
6530         struct compound_hdr hdr;
6531         int status;
6532
6533         status = decode_compound_hdr(xdr, &hdr);
6534         if (!status)
6535                 status = decode_setclientid(xdr, res);
6536         return status;
6537 }
6538
6539 /*
6540  * Decode SETCLIENTID_CONFIRM response
6541  */
6542 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6543                                             struct xdr_stream *xdr,
6544                                             struct nfs_fsinfo *fsinfo)
6545 {
6546         struct compound_hdr hdr;
6547         int status;
6548
6549         status = decode_compound_hdr(xdr, &hdr);
6550         if (!status)
6551                 status = decode_setclientid_confirm(xdr);
6552         if (!status)
6553                 status = decode_putrootfh(xdr);
6554         if (!status)
6555                 status = decode_fsinfo(xdr, fsinfo);
6556         return status;
6557 }
6558
6559 /*
6560  * Decode DELEGRETURN response
6561  */
6562 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6563                                     struct xdr_stream *xdr,
6564                                     struct nfs4_delegreturnres *res)
6565 {
6566         struct compound_hdr hdr;
6567         int status;
6568
6569         status = decode_compound_hdr(xdr, &hdr);
6570         if (status)
6571                 goto out;
6572         status = decode_sequence(xdr, &res->seq_res, rqstp);
6573         if (status)
6574                 goto out;
6575         status = decode_putfh(xdr);
6576         if (status != 0)
6577                 goto out;
6578         status = decode_delegreturn(xdr);
6579         if (status != 0)
6580                 goto out;
6581         decode_getfattr(xdr, res->fattr, res->server);
6582 out:
6583         return status;
6584 }
6585
6586 /*
6587  * Decode FS_LOCATIONS response
6588  */
6589 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6590                                      struct xdr_stream *xdr,
6591                                      struct nfs4_fs_locations_res *res)
6592 {
6593         struct compound_hdr hdr;
6594         int status;
6595
6596         status = decode_compound_hdr(xdr, &hdr);
6597         if (status)
6598                 goto out;
6599         status = decode_sequence(xdr, &res->seq_res, req);
6600         if (status)
6601                 goto out;
6602         status = decode_putfh(xdr);
6603         if (status)
6604                 goto out;
6605         status = decode_lookup(xdr);
6606         if (status)
6607                 goto out;
6608         xdr_enter_page(xdr, PAGE_SIZE);
6609         status = decode_getfattr_generic(xdr, &res->fs_locations->fattr,
6610                                          NULL, res->fs_locations,
6611                                          res->fs_locations->server);
6612 out:
6613         return status;
6614 }
6615
6616 /*
6617  * Decode SECINFO response
6618  */
6619 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6620                                 struct xdr_stream *xdr,
6621                                 struct nfs4_secinfo_res *res)
6622 {
6623         struct compound_hdr hdr;
6624         int status;
6625
6626         status = decode_compound_hdr(xdr, &hdr);
6627         if (status)
6628                 goto out;
6629         status = decode_sequence(xdr, &res->seq_res, rqstp);
6630         if (status)
6631                 goto out;
6632         status = decode_putfh(xdr);
6633         if (status)
6634                 goto out;
6635         status = decode_secinfo(xdr, res);
6636 out:
6637         return status;
6638 }
6639
6640 #if defined(CONFIG_NFS_V4_1)
6641 /*
6642  * Decode EXCHANGE_ID response
6643  */
6644 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
6645                                     struct xdr_stream *xdr,
6646                                     void *res)
6647 {
6648         struct compound_hdr hdr;
6649         int status;
6650
6651         status = decode_compound_hdr(xdr, &hdr);
6652         if (!status)
6653                 status = decode_exchange_id(xdr, res);
6654         return status;
6655 }
6656
6657 /*
6658  * Decode CREATE_SESSION response
6659  */
6660 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
6661                                        struct xdr_stream *xdr,
6662                                        struct nfs41_create_session_res *res)
6663 {
6664         struct compound_hdr hdr;
6665         int status;
6666
6667         status = decode_compound_hdr(xdr, &hdr);
6668         if (!status)
6669                 status = decode_create_session(xdr, res);
6670         return status;
6671 }
6672
6673 /*
6674  * Decode DESTROY_SESSION response
6675  */
6676 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
6677                                         struct xdr_stream *xdr,
6678                                         void *res)
6679 {
6680         struct compound_hdr hdr;
6681         int status;
6682
6683         status = decode_compound_hdr(xdr, &hdr);
6684         if (!status)
6685                 status = decode_destroy_session(xdr, res);
6686         return status;
6687 }
6688
6689 /*
6690  * Decode SEQUENCE response
6691  */
6692 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
6693                                  struct xdr_stream *xdr,
6694                                  struct nfs4_sequence_res *res)
6695 {
6696         struct compound_hdr hdr;
6697         int status;
6698
6699         status = decode_compound_hdr(xdr, &hdr);
6700         if (!status)
6701                 status = decode_sequence(xdr, res, rqstp);
6702         return status;
6703 }
6704
6705 /*
6706  * Decode GET_LEASE_TIME response
6707  */
6708 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
6709                                        struct xdr_stream *xdr,
6710                                        struct nfs4_get_lease_time_res *res)
6711 {
6712         struct compound_hdr hdr;
6713         int status;
6714
6715         status = decode_compound_hdr(xdr, &hdr);
6716         if (!status)
6717                 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
6718         if (!status)
6719                 status = decode_putrootfh(xdr);
6720         if (!status)
6721                 status = decode_fsinfo(xdr, res->lr_fsinfo);
6722         return status;
6723 }
6724
6725 /*
6726  * Decode RECLAIM_COMPLETE response
6727  */
6728 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
6729                                          struct xdr_stream *xdr,
6730                                          struct nfs41_reclaim_complete_res *res)
6731 {
6732         struct compound_hdr hdr;
6733         int status;
6734
6735         status = decode_compound_hdr(xdr, &hdr);
6736         if (!status)
6737                 status = decode_sequence(xdr, &res->seq_res, rqstp);
6738         if (!status)
6739                 status = decode_reclaim_complete(xdr, (void *)NULL);
6740         return status;
6741 }
6742
6743 /*
6744  * Decode GETDEVICELIST response
6745  */
6746 static int nfs4_xdr_dec_getdevicelist(struct rpc_rqst *rqstp,
6747                                       struct xdr_stream *xdr,
6748                                       struct nfs4_getdevicelist_res *res)
6749 {
6750         struct compound_hdr hdr;
6751         int status;
6752
6753         dprintk("encoding getdevicelist!\n");
6754
6755         status = decode_compound_hdr(xdr, &hdr);
6756         if (status != 0)
6757                 goto out;
6758         status = decode_sequence(xdr, &res->seq_res, rqstp);
6759         if (status != 0)
6760                 goto out;
6761         status = decode_putfh(xdr);
6762         if (status != 0)
6763                 goto out;
6764         status = decode_getdevicelist(xdr, res->devlist);
6765 out:
6766         return status;
6767 }
6768
6769 /*
6770  * Decode GETDEVINFO response
6771  */
6772 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
6773                                       struct xdr_stream *xdr,
6774                                       struct nfs4_getdeviceinfo_res *res)
6775 {
6776         struct compound_hdr hdr;
6777         int status;
6778
6779         status = decode_compound_hdr(xdr, &hdr);
6780         if (status != 0)
6781                 goto out;
6782         status = decode_sequence(xdr, &res->seq_res, rqstp);
6783         if (status != 0)
6784                 goto out;
6785         status = decode_getdeviceinfo(xdr, res->pdev);
6786 out:
6787         return status;
6788 }
6789
6790 /*
6791  * Decode LAYOUTGET response
6792  */
6793 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
6794                                   struct xdr_stream *xdr,
6795                                   struct nfs4_layoutget_res *res)
6796 {
6797         struct compound_hdr hdr;
6798         int status;
6799
6800         status = decode_compound_hdr(xdr, &hdr);
6801         if (status)
6802                 goto out;
6803         status = decode_sequence(xdr, &res->seq_res, rqstp);
6804         if (status)
6805                 goto out;
6806         status = decode_putfh(xdr);
6807         if (status)
6808                 goto out;
6809         status = decode_layoutget(xdr, rqstp, res);
6810 out:
6811         return status;
6812 }
6813
6814 /*
6815  * Decode LAYOUTRETURN response
6816  */
6817 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
6818                                      struct xdr_stream *xdr,
6819                                      struct nfs4_layoutreturn_res *res)
6820 {
6821         struct compound_hdr hdr;
6822         int status;
6823
6824         status = decode_compound_hdr(xdr, &hdr);
6825         if (status)
6826                 goto out;
6827         status = decode_sequence(xdr, &res->seq_res, rqstp);
6828         if (status)
6829                 goto out;
6830         status = decode_putfh(xdr);
6831         if (status)
6832                 goto out;
6833         status = decode_layoutreturn(xdr, res);
6834 out:
6835         return status;
6836 }
6837
6838 /*
6839  * Decode LAYOUTCOMMIT response
6840  */
6841 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
6842                                      struct xdr_stream *xdr,
6843                                      struct nfs4_layoutcommit_res *res)
6844 {
6845         struct compound_hdr hdr;
6846         int status;
6847
6848         status = decode_compound_hdr(xdr, &hdr);
6849         if (status)
6850                 goto out;
6851         status = decode_sequence(xdr, &res->seq_res, rqstp);
6852         if (status)
6853                 goto out;
6854         status = decode_putfh(xdr);
6855         if (status)
6856                 goto out;
6857         status = decode_layoutcommit(xdr, rqstp, res);
6858         if (status)
6859                 goto out;
6860         decode_getfattr(xdr, res->fattr, res->server);
6861 out:
6862         return status;
6863 }
6864
6865 /*
6866  * Decode SECINFO_NO_NAME response
6867  */
6868 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
6869                                         struct xdr_stream *xdr,
6870                                         struct nfs4_secinfo_res *res)
6871 {
6872         struct compound_hdr hdr;
6873         int status;
6874
6875         status = decode_compound_hdr(xdr, &hdr);
6876         if (status)
6877                 goto out;
6878         status = decode_sequence(xdr, &res->seq_res, rqstp);
6879         if (status)
6880                 goto out;
6881         status = decode_putrootfh(xdr);
6882         if (status)
6883                 goto out;
6884         status = decode_secinfo(xdr, res);
6885 out:
6886         return status;
6887 }
6888
6889 /*
6890  * Decode TEST_STATEID response
6891  */
6892 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
6893                                      struct xdr_stream *xdr,
6894                                      struct nfs41_test_stateid_res *res)
6895 {
6896         struct compound_hdr hdr;
6897         int status;
6898
6899         status = decode_compound_hdr(xdr, &hdr);
6900         if (status)
6901                 goto out;
6902         status = decode_sequence(xdr, &res->seq_res, rqstp);
6903         if (status)
6904                 goto out;
6905         status = decode_test_stateid(xdr, res);
6906 out:
6907         return status;
6908 }
6909
6910 /*
6911  * Decode FREE_STATEID response
6912  */
6913 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
6914                                      struct xdr_stream *xdr,
6915                                      struct nfs41_free_stateid_res *res)
6916 {
6917         struct compound_hdr hdr;
6918         int status;
6919
6920         status = decode_compound_hdr(xdr, &hdr);
6921         if (status)
6922                 goto out;
6923         status = decode_sequence(xdr, &res->seq_res, rqstp);
6924         if (status)
6925                 goto out;
6926         status = decode_free_stateid(xdr, res);
6927 out:
6928         return status;
6929 }
6930 #endif /* CONFIG_NFS_V4_1 */
6931
6932 /**
6933  * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
6934  *                      the local page cache.
6935  * @xdr: XDR stream where entry resides
6936  * @entry: buffer to fill in with entry data
6937  * @plus: boolean indicating whether this should be a readdirplus entry
6938  *
6939  * Returns zero if successful, otherwise a negative errno value is
6940  * returned.
6941  *
6942  * This function is not invoked during READDIR reply decoding, but
6943  * rather whenever an application invokes the getdents(2) system call
6944  * on a directory already in our cache.
6945  */
6946 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
6947                        int plus)
6948 {
6949         uint32_t bitmap[3] = {0};
6950         uint32_t len;
6951         __be32 *p = xdr_inline_decode(xdr, 4);
6952         if (unlikely(!p))
6953                 goto out_overflow;
6954         if (*p == xdr_zero) {
6955                 p = xdr_inline_decode(xdr, 4);
6956                 if (unlikely(!p))
6957                         goto out_overflow;
6958                 if (*p == xdr_zero)
6959                         return -EAGAIN;
6960                 entry->eof = 1;
6961                 return -EBADCOOKIE;
6962         }
6963
6964         p = xdr_inline_decode(xdr, 12);
6965         if (unlikely(!p))
6966                 goto out_overflow;
6967         entry->prev_cookie = entry->cookie;
6968         p = xdr_decode_hyper(p, &entry->cookie);
6969         entry->len = be32_to_cpup(p);
6970
6971         p = xdr_inline_decode(xdr, entry->len);
6972         if (unlikely(!p))
6973                 goto out_overflow;
6974         entry->name = (const char *) p;
6975
6976         /*
6977          * In case the server doesn't return an inode number,
6978          * we fake one here.  (We don't use inode number 0,
6979          * since glibc seems to choke on it...)
6980          */
6981         entry->ino = 1;
6982         entry->fattr->valid = 0;
6983
6984         if (decode_attr_bitmap(xdr, bitmap) < 0)
6985                 goto out_overflow;
6986
6987         if (decode_attr_length(xdr, &len, &p) < 0)
6988                 goto out_overflow;
6989
6990         if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
6991                                   NULL, entry->server) < 0)
6992                 goto out_overflow;
6993         if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
6994                 entry->ino = entry->fattr->mounted_on_fileid;
6995         else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
6996                 entry->ino = entry->fattr->fileid;
6997
6998         entry->d_type = DT_UNKNOWN;
6999         if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7000                 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7001
7002         return 0;
7003
7004 out_overflow:
7005         print_overflow_msg(__func__, xdr);
7006         return -EAGAIN;
7007 }
7008
7009 /*
7010  * We need to translate between nfs status return values and
7011  * the local errno values which may not be the same.
7012  */
7013 static struct {
7014         int stat;
7015         int errno;
7016 } nfs_errtbl[] = {
7017         { NFS4_OK,              0               },
7018         { NFS4ERR_PERM,         -EPERM          },
7019         { NFS4ERR_NOENT,        -ENOENT         },
7020         { NFS4ERR_IO,           -errno_NFSERR_IO},
7021         { NFS4ERR_NXIO,         -ENXIO          },
7022         { NFS4ERR_ACCESS,       -EACCES         },
7023         { NFS4ERR_EXIST,        -EEXIST         },
7024         { NFS4ERR_XDEV,         -EXDEV          },
7025         { NFS4ERR_NOTDIR,       -ENOTDIR        },
7026         { NFS4ERR_ISDIR,        -EISDIR         },
7027         { NFS4ERR_INVAL,        -EINVAL         },
7028         { NFS4ERR_FBIG,         -EFBIG          },
7029         { NFS4ERR_NOSPC,        -ENOSPC         },
7030         { NFS4ERR_ROFS,         -EROFS          },
7031         { NFS4ERR_MLINK,        -EMLINK         },
7032         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
7033         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
7034         { NFS4ERR_DQUOT,        -EDQUOT         },
7035         { NFS4ERR_STALE,        -ESTALE         },
7036         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
7037         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
7038         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
7039         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
7040         { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
7041         { NFS4ERR_BADTYPE,      -EBADTYPE       },
7042         { NFS4ERR_LOCKED,       -EAGAIN         },
7043         { NFS4ERR_SYMLINK,      -ELOOP          },
7044         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
7045         { NFS4ERR_DEADLOCK,     -EDEADLK        },
7046         { -1,                   -EIO            }
7047 };
7048
7049 /*
7050  * Convert an NFS error code to a local one.
7051  * This one is used jointly by NFSv2 and NFSv3.
7052  */
7053 static int
7054 nfs4_stat_to_errno(int stat)
7055 {
7056         int i;
7057         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7058                 if (nfs_errtbl[i].stat == stat)
7059                         return nfs_errtbl[i].errno;
7060         }
7061         if (stat <= 10000 || stat > 10100) {
7062                 /* The server is looney tunes. */
7063                 return -EREMOTEIO;
7064         }
7065         /* If we cannot translate the error, the recovery routines should
7066          * handle it.
7067          * Note: remaining NFSv4 error codes have values > 10000, so should
7068          * not conflict with native Linux error codes.
7069          */
7070         return -stat;
7071 }
7072
7073 #define PROC(proc, argtype, restype)                            \
7074 [NFSPROC4_CLNT_##proc] = {                                      \
7075         .p_proc   = NFSPROC4_COMPOUND,                          \
7076         .p_encode = (kxdreproc_t)nfs4_xdr_##argtype,            \
7077         .p_decode = (kxdrdproc_t)nfs4_xdr_##restype,            \
7078         .p_arglen = NFS4_##argtype##_sz,                        \
7079         .p_replen = NFS4_##restype##_sz,                        \
7080         .p_statidx = NFSPROC4_CLNT_##proc,                      \
7081         .p_name   = #proc,                                      \
7082 }
7083
7084 struct rpc_procinfo     nfs4_procedures[] = {
7085         PROC(READ,              enc_read,               dec_read),
7086         PROC(WRITE,             enc_write,              dec_write),
7087         PROC(COMMIT,            enc_commit,             dec_commit),
7088         PROC(OPEN,              enc_open,               dec_open),
7089         PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
7090         PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
7091         PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
7092         PROC(CLOSE,             enc_close,              dec_close),
7093         PROC(SETATTR,           enc_setattr,            dec_setattr),
7094         PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
7095         PROC(RENEW,             enc_renew,              dec_renew),
7096         PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
7097         PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7098         PROC(LOCK,              enc_lock,               dec_lock),
7099         PROC(LOCKT,             enc_lockt,              dec_lockt),
7100         PROC(LOCKU,             enc_locku,              dec_locku),
7101         PROC(ACCESS,            enc_access,             dec_access),
7102         PROC(GETATTR,           enc_getattr,            dec_getattr),
7103         PROC(LOOKUP,            enc_lookup,             dec_lookup),
7104         PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
7105         PROC(REMOVE,            enc_remove,             dec_remove),
7106         PROC(RENAME,            enc_rename,             dec_rename),
7107         PROC(LINK,              enc_link,               dec_link),
7108         PROC(SYMLINK,           enc_symlink,            dec_symlink),
7109         PROC(CREATE,            enc_create,             dec_create),
7110         PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
7111         PROC(STATFS,            enc_statfs,             dec_statfs),
7112         PROC(READLINK,          enc_readlink,           dec_readlink),
7113         PROC(READDIR,           enc_readdir,            dec_readdir),
7114         PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
7115         PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
7116         PROC(GETACL,            enc_getacl,             dec_getacl),
7117         PROC(SETACL,            enc_setacl,             dec_setacl),
7118         PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
7119         PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
7120         PROC(SECINFO,           enc_secinfo,            dec_secinfo),
7121 #if defined(CONFIG_NFS_V4_1)
7122         PROC(EXCHANGE_ID,       enc_exchange_id,        dec_exchange_id),
7123         PROC(CREATE_SESSION,    enc_create_session,     dec_create_session),
7124         PROC(DESTROY_SESSION,   enc_destroy_session,    dec_destroy_session),
7125         PROC(SEQUENCE,          enc_sequence,           dec_sequence),
7126         PROC(GET_LEASE_TIME,    enc_get_lease_time,     dec_get_lease_time),
7127         PROC(RECLAIM_COMPLETE,  enc_reclaim_complete,   dec_reclaim_complete),
7128         PROC(GETDEVICEINFO,     enc_getdeviceinfo,      dec_getdeviceinfo),
7129         PROC(LAYOUTGET,         enc_layoutget,          dec_layoutget),
7130         PROC(LAYOUTCOMMIT,      enc_layoutcommit,       dec_layoutcommit),
7131         PROC(LAYOUTRETURN,      enc_layoutreturn,       dec_layoutreturn),
7132         PROC(SECINFO_NO_NAME,   enc_secinfo_no_name,    dec_secinfo_no_name),
7133         PROC(TEST_STATEID,      enc_test_stateid,       dec_test_stateid),
7134         PROC(FREE_STATEID,      enc_free_stateid,       dec_free_stateid),
7135         PROC(GETDEVICELIST,     enc_getdevicelist,      dec_getdevicelist),
7136 #endif /* CONFIG_NFS_V4_1 */
7137 };
7138
7139 const struct rpc_version nfs_version4 = {
7140         .number                 = 4,
7141         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
7142         .procs                  = nfs4_procedures
7143 };
7144
7145 /*
7146  * Local variables:
7147  *  c-basic-offset: 8
7148  * End:
7149  */