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         encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1088         encode_uint32(xdr, access);
1089 }
1090
1091 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1092 {
1093         encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1094         encode_nfs4_seqid(xdr, arg->seqid);
1095         encode_nfs4_stateid(xdr, arg->stateid);
1096 }
1097
1098 static void encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1099 {
1100         __be32 *p;
1101
1102         encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1103         p = reserve_space(xdr, 12);
1104         p = xdr_encode_hyper(p, args->offset);
1105         *p = cpu_to_be32(args->count);
1106 }
1107
1108 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1109 {
1110         __be32 *p;
1111
1112         encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1113         encode_uint32(xdr, create->ftype);
1114
1115         switch (create->ftype) {
1116         case NF4LNK:
1117                 p = reserve_space(xdr, 4);
1118                 *p = cpu_to_be32(create->u.symlink.len);
1119                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
1120                 break;
1121
1122         case NF4BLK: case NF4CHR:
1123                 p = reserve_space(xdr, 8);
1124                 *p++ = cpu_to_be32(create->u.device.specdata1);
1125                 *p = cpu_to_be32(create->u.device.specdata2);
1126                 break;
1127
1128         default:
1129                 break;
1130         }
1131
1132         encode_string(xdr, create->name->len, create->name->name);
1133         encode_attrs(xdr, create->attrs, create->server);
1134 }
1135
1136 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1137 {
1138         __be32 *p;
1139
1140         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1141         p = reserve_space(xdr, 8);
1142         *p++ = cpu_to_be32(1);
1143         *p = cpu_to_be32(bitmap);
1144 }
1145
1146 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1147 {
1148         __be32 *p;
1149
1150         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1151         p = reserve_space(xdr, 12);
1152         *p++ = cpu_to_be32(2);
1153         *p++ = cpu_to_be32(bm0);
1154         *p = cpu_to_be32(bm1);
1155 }
1156
1157 static void
1158 encode_getattr_three(struct xdr_stream *xdr,
1159                      uint32_t bm0, uint32_t bm1, uint32_t bm2,
1160                      struct compound_hdr *hdr)
1161 {
1162         __be32 *p;
1163
1164         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1165         if (bm2) {
1166                 p = reserve_space(xdr, 16);
1167                 *p++ = cpu_to_be32(3);
1168                 *p++ = cpu_to_be32(bm0);
1169                 *p++ = cpu_to_be32(bm1);
1170                 *p = cpu_to_be32(bm2);
1171         } else if (bm1) {
1172                 p = reserve_space(xdr, 12);
1173                 *p++ = cpu_to_be32(2);
1174                 *p++ = cpu_to_be32(bm0);
1175                 *p = cpu_to_be32(bm1);
1176         } else {
1177                 p = reserve_space(xdr, 8);
1178                 *p++ = cpu_to_be32(1);
1179                 *p = cpu_to_be32(bm0);
1180         }
1181 }
1182
1183 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1184 {
1185         encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1186                            bitmask[1] & nfs4_fattr_bitmap[1], hdr);
1187 }
1188
1189 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1190 {
1191         encode_getattr_three(xdr,
1192                              bitmask[0] & nfs4_fsinfo_bitmap[0],
1193                              bitmask[1] & nfs4_fsinfo_bitmap[1],
1194                              bitmask[2] & nfs4_fsinfo_bitmap[2],
1195                              hdr);
1196 }
1197
1198 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1199 {
1200         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1201                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1202 }
1203
1204 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1205 {
1206         encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1207 }
1208
1209 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1210 {
1211         encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1212         encode_string(xdr, name->len, name->name);
1213 }
1214
1215 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1216 {
1217         if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
1218                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1219         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1220 }
1221
1222 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1223 {
1224         if (fl->fl_end == OFFSET_MAX)
1225                 return ~(uint64_t)0;
1226         return fl->fl_end - fl->fl_start + 1;
1227 }
1228
1229 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1230 {
1231         __be32 *p;
1232
1233         p = reserve_space(xdr, 32);
1234         p = xdr_encode_hyper(p, lowner->clientid);
1235         *p++ = cpu_to_be32(20);
1236         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1237         *p++ = cpu_to_be32(lowner->s_dev);
1238         xdr_encode_hyper(p, lowner->id);
1239 }
1240
1241 /*
1242  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1243  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1244  */
1245 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1246 {
1247         __be32 *p;
1248
1249         encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1250         p = reserve_space(xdr, 28);
1251         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1252         *p++ = cpu_to_be32(args->reclaim);
1253         p = xdr_encode_hyper(p, args->fl->fl_start);
1254         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1255         *p = cpu_to_be32(args->new_lock_owner);
1256         if (args->new_lock_owner){
1257                 encode_nfs4_seqid(xdr, args->open_seqid);
1258                 encode_nfs4_stateid(xdr, args->open_stateid);
1259                 encode_nfs4_seqid(xdr, args->lock_seqid);
1260                 encode_lockowner(xdr, &args->lock_owner);
1261         }
1262         else {
1263                 encode_nfs4_stateid(xdr, args->lock_stateid);
1264                 encode_nfs4_seqid(xdr, args->lock_seqid);
1265         }
1266 }
1267
1268 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1269 {
1270         __be32 *p;
1271
1272         encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1273         p = reserve_space(xdr, 20);
1274         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1275         p = xdr_encode_hyper(p, args->fl->fl_start);
1276         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1277         encode_lockowner(xdr, &args->lock_owner);
1278 }
1279
1280 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1281 {
1282         __be32 *p;
1283
1284         encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1285         encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1286         encode_nfs4_seqid(xdr, args->seqid);
1287         encode_nfs4_stateid(xdr, args->stateid);
1288         p = reserve_space(xdr, 16);
1289         p = xdr_encode_hyper(p, args->fl->fl_start);
1290         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1291 }
1292
1293 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1294 {
1295         encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1296         encode_lockowner(xdr, lowner);
1297 }
1298
1299 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1300 {
1301         encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1302         encode_string(xdr, name->len, name->name);
1303 }
1304
1305 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1306 {
1307         __be32 *p;
1308
1309         p = reserve_space(xdr, 8);
1310         switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1311         case FMODE_READ:
1312                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1313                 break;
1314         case FMODE_WRITE:
1315                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1316                 break;
1317         case FMODE_READ|FMODE_WRITE:
1318                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1319                 break;
1320         default:
1321                 *p++ = cpu_to_be32(0);
1322         }
1323         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1324 }
1325
1326 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1327 {
1328         __be32 *p;
1329  /*
1330  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1331  * owner 4 = 32
1332  */
1333         encode_nfs4_seqid(xdr, arg->seqid);
1334         encode_share_access(xdr, arg->fmode);
1335         p = reserve_space(xdr, 32);
1336         p = xdr_encode_hyper(p, arg->clientid);
1337         *p++ = cpu_to_be32(20);
1338         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1339         *p++ = cpu_to_be32(arg->server->s_dev);
1340         xdr_encode_hyper(p, arg->id);
1341 }
1342
1343 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1344 {
1345         __be32 *p;
1346         struct nfs_client *clp;
1347
1348         p = reserve_space(xdr, 4);
1349         switch(arg->open_flags & O_EXCL) {
1350         case 0:
1351                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1352                 encode_attrs(xdr, arg->u.attrs, arg->server);
1353                 break;
1354         default:
1355                 clp = arg->server->nfs_client;
1356                 if (clp->cl_mvops->minor_version > 0) {
1357                         if (nfs4_has_persistent_session(clp)) {
1358                                 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1359                                 encode_attrs(xdr, arg->u.attrs, arg->server);
1360                         } else {
1361                                 struct iattr dummy;
1362
1363                                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1364                                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1365                                 dummy.ia_valid = 0;
1366                                 encode_attrs(xdr, &dummy, arg->server);
1367                         }
1368                 } else {
1369                         *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1370                         encode_nfs4_verifier(xdr, &arg->u.verifier);
1371                 }
1372         }
1373 }
1374
1375 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1376 {
1377         __be32 *p;
1378
1379         p = reserve_space(xdr, 4);
1380         switch (arg->open_flags & O_CREAT) {
1381         case 0:
1382                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1383                 break;
1384         default:
1385                 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1386                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1387                 encode_createmode(xdr, arg);
1388         }
1389 }
1390
1391 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1392 {
1393         __be32 *p;
1394
1395         p = reserve_space(xdr, 4);
1396         switch (delegation_type) {
1397         case 0:
1398                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1399                 break;
1400         case FMODE_READ:
1401                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1402                 break;
1403         case FMODE_WRITE|FMODE_READ:
1404                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1405                 break;
1406         default:
1407                 BUG();
1408         }
1409 }
1410
1411 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1412 {
1413         __be32 *p;
1414
1415         p = reserve_space(xdr, 4);
1416         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1417         encode_string(xdr, name->len, name->name);
1418 }
1419
1420 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1421 {
1422         __be32 *p;
1423
1424         p = reserve_space(xdr, 4);
1425         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1426         encode_delegation_type(xdr, type);
1427 }
1428
1429 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1430 {
1431         __be32 *p;
1432
1433         p = reserve_space(xdr, 4);
1434         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1435         encode_nfs4_stateid(xdr, stateid);
1436         encode_string(xdr, name->len, name->name);
1437 }
1438
1439 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1440 {
1441         encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1442         encode_openhdr(xdr, arg);
1443         encode_opentype(xdr, arg);
1444         switch (arg->claim) {
1445         case NFS4_OPEN_CLAIM_NULL:
1446                 encode_claim_null(xdr, arg->name);
1447                 break;
1448         case NFS4_OPEN_CLAIM_PREVIOUS:
1449                 encode_claim_previous(xdr, arg->u.delegation_type);
1450                 break;
1451         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1452                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1453                 break;
1454         default:
1455                 BUG();
1456         }
1457 }
1458
1459 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1460 {
1461         encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1462         encode_nfs4_stateid(xdr, arg->stateid);
1463         encode_nfs4_seqid(xdr, arg->seqid);
1464 }
1465
1466 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1467 {
1468         encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1469         encode_nfs4_stateid(xdr, arg->stateid);
1470         encode_nfs4_seqid(xdr, arg->seqid);
1471         encode_share_access(xdr, arg->fmode);
1472 }
1473
1474 static void
1475 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1476 {
1477         encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1478         encode_string(xdr, fh->size, fh->data);
1479 }
1480
1481 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1482 {
1483         encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1484 }
1485
1486 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)
1487 {
1488         nfs4_stateid stateid;
1489
1490         if (ctx->state != NULL) {
1491                 nfs4_select_rw_stateid(&stateid, ctx->state, l_ctx->lockowner, l_ctx->pid);
1492                 if (zero_seqid)
1493                         stateid.seqid = 0;
1494                 encode_nfs4_stateid(xdr, &stateid);
1495         } else
1496                 encode_nfs4_stateid(xdr, &zero_stateid);
1497 }
1498
1499 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1500 {
1501         __be32 *p;
1502
1503         encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1504         encode_open_stateid(xdr, args->context, args->lock_context,
1505                        hdr->minorversion);
1506
1507         p = reserve_space(xdr, 12);
1508         p = xdr_encode_hyper(p, args->offset);
1509         *p = cpu_to_be32(args->count);
1510 }
1511
1512 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1513 {
1514         uint32_t attrs[2] = {
1515                 FATTR4_WORD0_RDATTR_ERROR,
1516                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1517         };
1518         uint32_t dircount = readdir->count >> 1;
1519         __be32 *p, verf[2];
1520
1521         if (readdir->plus) {
1522                 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1523                         FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1524                 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1525                         FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1526                         FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1527                         FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1528                 dircount >>= 1;
1529         }
1530         /* Use mounted_on_fileid only if the server supports it */
1531         if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1532                 attrs[0] |= FATTR4_WORD0_FILEID;
1533
1534         encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1535         p = reserve_space(xdr, 8);
1536         p = xdr_encode_hyper(p, readdir->cookie);
1537         encode_nfs4_verifier(xdr, &readdir->verifier);
1538         p = reserve_space(xdr, 20);
1539         *p++ = cpu_to_be32(dircount);
1540         *p++ = cpu_to_be32(readdir->count);
1541         *p++ = cpu_to_be32(2);
1542
1543         *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1544         *p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1545         memcpy(verf, readdir->verifier.data, sizeof(verf));
1546         dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1547                         __func__,
1548                         (unsigned long long)readdir->cookie,
1549                         verf[0], verf[1],
1550                         attrs[0] & readdir->bitmask[0],
1551                         attrs[1] & readdir->bitmask[1]);
1552 }
1553
1554 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1555 {
1556         encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1557 }
1558
1559 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1560 {
1561         encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1562         encode_string(xdr, name->len, name->name);
1563 }
1564
1565 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1566 {
1567         encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1568         encode_string(xdr, oldname->len, oldname->name);
1569         encode_string(xdr, newname->len, newname->name);
1570 }
1571
1572 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1573                          struct compound_hdr *hdr)
1574 {
1575         __be32 *p;
1576
1577         encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1578         p = reserve_space(xdr, 8);
1579         xdr_encode_hyper(p, clid);
1580 }
1581
1582 static void
1583 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1584 {
1585         encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1586 }
1587
1588 static void
1589 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1590 {
1591         __be32 *p;
1592
1593         encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1594         encode_nfs4_stateid(xdr, &zero_stateid);
1595         p = reserve_space(xdr, 2*4);
1596         *p++ = cpu_to_be32(1);
1597         *p = cpu_to_be32(FATTR4_WORD0_ACL);
1598         BUG_ON(arg->acl_len % 4);
1599         p = reserve_space(xdr, 4);
1600         *p = cpu_to_be32(arg->acl_len);
1601         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1602 }
1603
1604 static void
1605 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1606 {
1607         encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1608 }
1609
1610 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1611 {
1612         encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1613         encode_nfs4_stateid(xdr, &arg->stateid);
1614         encode_attrs(xdr, arg->iap, server);
1615 }
1616
1617 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1618 {
1619         __be32 *p;
1620
1621         encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1622         encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1623
1624         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1625         p = reserve_space(xdr, 4);
1626         *p = cpu_to_be32(setclientid->sc_prog);
1627         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1628         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1629         p = reserve_space(xdr, 4);
1630         *p = cpu_to_be32(setclientid->sc_cb_ident);
1631 }
1632
1633 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1634 {
1635         __be32 *p;
1636
1637         encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1638                         decode_setclientid_confirm_maxsz, hdr);
1639         p = reserve_space(xdr, 8);
1640         p = xdr_encode_hyper(p, arg->clientid);
1641         encode_nfs4_verifier(xdr, &arg->confirm);
1642 }
1643
1644 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1645 {
1646         __be32 *p;
1647
1648         encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1649         encode_open_stateid(xdr, args->context, args->lock_context,
1650                        hdr->minorversion);
1651
1652         p = reserve_space(xdr, 16);
1653         p = xdr_encode_hyper(p, args->offset);
1654         *p++ = cpu_to_be32(args->stable);
1655         *p = cpu_to_be32(args->count);
1656
1657         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1658 }
1659
1660 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1661 {
1662         encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1663         encode_nfs4_stateid(xdr, stateid);
1664 }
1665
1666 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1667 {
1668         encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1669         encode_string(xdr, name->len, name->name);
1670 }
1671
1672 #if defined(CONFIG_NFS_V4_1)
1673 /* NFSv4.1 operations */
1674 static void encode_exchange_id(struct xdr_stream *xdr,
1675                                struct nfs41_exchange_id_args *args,
1676                                struct compound_hdr *hdr)
1677 {
1678         __be32 *p;
1679         char impl_name[NFS4_OPAQUE_LIMIT];
1680         int len = 0;
1681
1682         encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1683         encode_nfs4_verifier(xdr, args->verifier);
1684
1685         encode_string(xdr, args->id_len, args->id);
1686
1687         p = reserve_space(xdr, 12);
1688         *p++ = cpu_to_be32(args->flags);
1689         *p++ = cpu_to_be32(0);  /* zero length state_protect4_a */
1690
1691         if (send_implementation_id &&
1692             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1693             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1694                 <= NFS4_OPAQUE_LIMIT + 1)
1695                 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1696                                utsname()->sysname, utsname()->release,
1697                                utsname()->version, utsname()->machine);
1698
1699         if (len > 0) {
1700                 *p = cpu_to_be32(1);    /* implementation id array length=1 */
1701
1702                 encode_string(xdr,
1703                         sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1704                         CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1705                 encode_string(xdr, len, impl_name);
1706                 /* just send zeros for nii_date - the date is in nii_name */
1707                 p = reserve_space(xdr, 12);
1708                 p = xdr_encode_hyper(p, 0);
1709                 *p = cpu_to_be32(0);
1710         } else
1711                 *p = cpu_to_be32(0);    /* implementation id array length=0 */
1712 }
1713
1714 static void encode_create_session(struct xdr_stream *xdr,
1715                                   struct nfs41_create_session_args *args,
1716                                   struct compound_hdr *hdr)
1717 {
1718         __be32 *p;
1719         char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1720         uint32_t len;
1721         struct nfs_client *clp = args->client;
1722         u32 max_resp_sz_cached;
1723
1724         /*
1725          * Assumes OPEN is the biggest non-idempotent compound.
1726          * 2 is the verifier.
1727          */
1728         max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1729                               RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1730
1731         len = scnprintf(machine_name, sizeof(machine_name), "%s",
1732                         clp->cl_ipaddr);
1733
1734         encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1735         p = reserve_space(xdr, 16 + 2*28 + 20 + len + 12);
1736         p = xdr_encode_hyper(p, clp->cl_clientid);
1737         *p++ = cpu_to_be32(clp->cl_seqid);                      /*Sequence id */
1738         *p++ = cpu_to_be32(args->flags);                        /*flags */
1739
1740         /* Fore Channel */
1741         *p++ = cpu_to_be32(0);                          /* header padding size */
1742         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1743         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1744         *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1745         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1746         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1747         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1748
1749         /* Back Channel */
1750         *p++ = cpu_to_be32(0);                          /* header padding size */
1751         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1752         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1753         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1754         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1755         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1756         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1757
1758         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1759         *p++ = cpu_to_be32(1);
1760         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1761
1762         /* authsys_parms rfc1831 */
1763         *p++ = cpu_to_be32((u32)clp->cl_boot_time.tv_nsec);     /* stamp */
1764         p = xdr_encode_opaque(p, machine_name, len);
1765         *p++ = cpu_to_be32(0);                          /* UID */
1766         *p++ = cpu_to_be32(0);                          /* GID */
1767         *p = cpu_to_be32(0);                            /* No more gids */
1768 }
1769
1770 static void encode_destroy_session(struct xdr_stream *xdr,
1771                                    struct nfs4_session *session,
1772                                    struct compound_hdr *hdr)
1773 {
1774         encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1775         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1776 }
1777
1778 static void encode_reclaim_complete(struct xdr_stream *xdr,
1779                                     struct nfs41_reclaim_complete_args *args,
1780                                     struct compound_hdr *hdr)
1781 {
1782         encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1783         encode_uint32(xdr, args->one_fs);
1784 }
1785 #endif /* CONFIG_NFS_V4_1 */
1786
1787 static void encode_sequence(struct xdr_stream *xdr,
1788                             const struct nfs4_sequence_args *args,
1789                             struct compound_hdr *hdr)
1790 {
1791 #if defined(CONFIG_NFS_V4_1)
1792         struct nfs4_session *session = args->sa_session;
1793         struct nfs4_slot_table *tp;
1794         struct nfs4_slot *slot;
1795         __be32 *p;
1796
1797         if (!session)
1798                 return;
1799
1800         tp = &session->fc_slot_table;
1801
1802         WARN_ON(args->sa_slotid == NFS4_MAX_SLOT_TABLE);
1803         slot = tp->slots + args->sa_slotid;
1804
1805         encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1806
1807         /*
1808          * Sessionid + seqid + slotid + max slotid + cache_this
1809          */
1810         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1811                 "max_slotid=%d cache_this=%d\n",
1812                 __func__,
1813                 ((u32 *)session->sess_id.data)[0],
1814                 ((u32 *)session->sess_id.data)[1],
1815                 ((u32 *)session->sess_id.data)[2],
1816                 ((u32 *)session->sess_id.data)[3],
1817                 slot->seq_nr, args->sa_slotid,
1818                 tp->highest_used_slotid, args->sa_cache_this);
1819         p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1820         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1821         *p++ = cpu_to_be32(slot->seq_nr);
1822         *p++ = cpu_to_be32(args->sa_slotid);
1823         *p++ = cpu_to_be32(tp->highest_used_slotid);
1824         *p = cpu_to_be32(args->sa_cache_this);
1825 #endif /* CONFIG_NFS_V4_1 */
1826 }
1827
1828 #ifdef CONFIG_NFS_V4_1
1829 static void
1830 encode_getdevicelist(struct xdr_stream *xdr,
1831                      const struct nfs4_getdevicelist_args *args,
1832                      struct compound_hdr *hdr)
1833 {
1834         __be32 *p;
1835         nfs4_verifier dummy = {
1836                 .data = "dummmmmy",
1837         };
1838
1839         encode_op_hdr(xdr, OP_GETDEVICELIST, decode_getdevicelist_maxsz, hdr);
1840         p = reserve_space(xdr, 16);
1841         *p++ = cpu_to_be32(args->layoutclass);
1842         *p++ = cpu_to_be32(NFS4_PNFS_GETDEVLIST_MAXNUM);
1843         xdr_encode_hyper(p, 0ULL);                          /* cookie */
1844         encode_nfs4_verifier(xdr, &dummy);
1845 }
1846
1847 static void
1848 encode_getdeviceinfo(struct xdr_stream *xdr,
1849                      const struct nfs4_getdeviceinfo_args *args,
1850                      struct compound_hdr *hdr)
1851 {
1852         __be32 *p;
1853
1854         encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1855         p = reserve_space(xdr, 12 + NFS4_DEVICEID4_SIZE);
1856         p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1857                                     NFS4_DEVICEID4_SIZE);
1858         *p++ = cpu_to_be32(args->pdev->layout_type);
1859         *p++ = cpu_to_be32(args->pdev->pglen);          /* gdia_maxcount */
1860         *p++ = cpu_to_be32(0);                          /* bitmap length 0 */
1861 }
1862
1863 static void
1864 encode_layoutget(struct xdr_stream *xdr,
1865                       const struct nfs4_layoutget_args *args,
1866                       struct compound_hdr *hdr)
1867 {
1868         __be32 *p;
1869
1870         encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1871         p = reserve_space(xdr, 36);
1872         *p++ = cpu_to_be32(0);     /* Signal layout available */
1873         *p++ = cpu_to_be32(args->type);
1874         *p++ = cpu_to_be32(args->range.iomode);
1875         p = xdr_encode_hyper(p, args->range.offset);
1876         p = xdr_encode_hyper(p, args->range.length);
1877         p = xdr_encode_hyper(p, args->minlength);
1878         encode_nfs4_stateid(xdr, &args->stateid);
1879         encode_uint32(xdr, args->maxcount);
1880
1881         dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1882                 __func__,
1883                 args->type,
1884                 args->range.iomode,
1885                 (unsigned long)args->range.offset,
1886                 (unsigned long)args->range.length,
1887                 args->maxcount);
1888 }
1889
1890 static int
1891 encode_layoutcommit(struct xdr_stream *xdr,
1892                     struct inode *inode,
1893                     const struct nfs4_layoutcommit_args *args,
1894                     struct compound_hdr *hdr)
1895 {
1896         __be32 *p;
1897
1898         dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1899                 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1900
1901         encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
1902         p = reserve_space(xdr, 20);
1903         /* Only whole file layouts */
1904         p = xdr_encode_hyper(p, 0); /* offset */
1905         p = xdr_encode_hyper(p, args->lastbytewritten + 1);     /* length */
1906         *p = cpu_to_be32(0); /* reclaim */
1907         encode_nfs4_stateid(xdr, &args->stateid);
1908         p = reserve_space(xdr, 20);
1909         *p++ = cpu_to_be32(1); /* newoffset = TRUE */
1910         p = xdr_encode_hyper(p, args->lastbytewritten);
1911         *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
1912         *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
1913
1914         if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit)
1915                 NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
1916                         NFS_I(inode)->layout, xdr, args);
1917         else
1918                 encode_uint32(xdr, 0); /* no layout-type payload */
1919
1920         return 0;
1921 }
1922
1923 static void
1924 encode_layoutreturn(struct xdr_stream *xdr,
1925                     const struct nfs4_layoutreturn_args *args,
1926                     struct compound_hdr *hdr)
1927 {
1928         __be32 *p;
1929
1930         encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
1931         p = reserve_space(xdr, 16);
1932         *p++ = cpu_to_be32(0);          /* reclaim. always 0 for now */
1933         *p++ = cpu_to_be32(args->layout_type);
1934         *p++ = cpu_to_be32(IOMODE_ANY);
1935         *p = cpu_to_be32(RETURN_FILE);
1936         p = reserve_space(xdr, 16);
1937         p = xdr_encode_hyper(p, 0);
1938         p = xdr_encode_hyper(p, NFS4_MAX_UINT64);
1939         spin_lock(&args->inode->i_lock);
1940         encode_nfs4_stateid(xdr, &args->stateid);
1941         spin_unlock(&args->inode->i_lock);
1942         if (NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn) {
1943                 NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn(
1944                         NFS_I(args->inode)->layout, xdr, args);
1945         } else
1946                 encode_uint32(xdr, 0);
1947 }
1948
1949 static int
1950 encode_secinfo_no_name(struct xdr_stream *xdr,
1951                        const struct nfs41_secinfo_no_name_args *args,
1952                        struct compound_hdr *hdr)
1953 {
1954         encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
1955         encode_uint32(xdr, args->style);
1956         return 0;
1957 }
1958
1959 static void encode_test_stateid(struct xdr_stream *xdr,
1960                                 struct nfs41_test_stateid_args *args,
1961                                 struct compound_hdr *hdr)
1962 {
1963         encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
1964         encode_uint32(xdr, 1);
1965         encode_nfs4_stateid(xdr, args->stateid);
1966 }
1967
1968 static void encode_free_stateid(struct xdr_stream *xdr,
1969                                 struct nfs41_free_stateid_args *args,
1970                                 struct compound_hdr *hdr)
1971 {
1972         encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
1973         encode_nfs4_stateid(xdr, args->stateid);
1974 }
1975 #endif /* CONFIG_NFS_V4_1 */
1976
1977 /*
1978  * END OF "GENERIC" ENCODE ROUTINES.
1979  */
1980
1981 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
1982 {
1983 #if defined(CONFIG_NFS_V4_1)
1984         if (args->sa_session)
1985                 return args->sa_session->clp->cl_mvops->minor_version;
1986 #endif /* CONFIG_NFS_V4_1 */
1987         return 0;
1988 }
1989
1990 /*
1991  * Encode an ACCESS request
1992  */
1993 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
1994                                 const struct nfs4_accessargs *args)
1995 {
1996         struct compound_hdr hdr = {
1997                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1998         };
1999
2000         encode_compound_hdr(xdr, req, &hdr);
2001         encode_sequence(xdr, &args->seq_args, &hdr);
2002         encode_putfh(xdr, args->fh, &hdr);
2003         encode_access(xdr, args->access, &hdr);
2004         encode_getfattr(xdr, args->bitmask, &hdr);
2005         encode_nops(&hdr);
2006 }
2007
2008 /*
2009  * Encode LOOKUP request
2010  */
2011 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2012                                 const struct nfs4_lookup_arg *args)
2013 {
2014         struct compound_hdr hdr = {
2015                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2016         };
2017
2018         encode_compound_hdr(xdr, req, &hdr);
2019         encode_sequence(xdr, &args->seq_args, &hdr);
2020         encode_putfh(xdr, args->dir_fh, &hdr);
2021         encode_lookup(xdr, args->name, &hdr);
2022         encode_getfh(xdr, &hdr);
2023         encode_getfattr(xdr, args->bitmask, &hdr);
2024         encode_nops(&hdr);
2025 }
2026
2027 /*
2028  * Encode LOOKUP_ROOT request
2029  */
2030 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2031                                      struct xdr_stream *xdr,
2032                                      const struct nfs4_lookup_root_arg *args)
2033 {
2034         struct compound_hdr hdr = {
2035                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2036         };
2037
2038         encode_compound_hdr(xdr, req, &hdr);
2039         encode_sequence(xdr, &args->seq_args, &hdr);
2040         encode_putrootfh(xdr, &hdr);
2041         encode_getfh(xdr, &hdr);
2042         encode_getfattr(xdr, args->bitmask, &hdr);
2043         encode_nops(&hdr);
2044 }
2045
2046 /*
2047  * Encode REMOVE request
2048  */
2049 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2050                                 const struct nfs_removeargs *args)
2051 {
2052         struct compound_hdr hdr = {
2053                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2054         };
2055
2056         encode_compound_hdr(xdr, req, &hdr);
2057         encode_sequence(xdr, &args->seq_args, &hdr);
2058         encode_putfh(xdr, args->fh, &hdr);
2059         encode_remove(xdr, &args->name, &hdr);
2060         encode_getfattr(xdr, args->bitmask, &hdr);
2061         encode_nops(&hdr);
2062 }
2063
2064 /*
2065  * Encode RENAME request
2066  */
2067 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2068                                 const struct nfs_renameargs *args)
2069 {
2070         struct compound_hdr hdr = {
2071                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2072         };
2073
2074         encode_compound_hdr(xdr, req, &hdr);
2075         encode_sequence(xdr, &args->seq_args, &hdr);
2076         encode_putfh(xdr, args->old_dir, &hdr);
2077         encode_savefh(xdr, &hdr);
2078         encode_putfh(xdr, args->new_dir, &hdr);
2079         encode_rename(xdr, args->old_name, args->new_name, &hdr);
2080         encode_getfattr(xdr, args->bitmask, &hdr);
2081         encode_restorefh(xdr, &hdr);
2082         encode_getfattr(xdr, args->bitmask, &hdr);
2083         encode_nops(&hdr);
2084 }
2085
2086 /*
2087  * Encode LINK request
2088  */
2089 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2090                              const struct nfs4_link_arg *args)
2091 {
2092         struct compound_hdr hdr = {
2093                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2094         };
2095
2096         encode_compound_hdr(xdr, req, &hdr);
2097         encode_sequence(xdr, &args->seq_args, &hdr);
2098         encode_putfh(xdr, args->fh, &hdr);
2099         encode_savefh(xdr, &hdr);
2100         encode_putfh(xdr, args->dir_fh, &hdr);
2101         encode_link(xdr, args->name, &hdr);
2102         encode_getfattr(xdr, args->bitmask, &hdr);
2103         encode_restorefh(xdr, &hdr);
2104         encode_getfattr(xdr, args->bitmask, &hdr);
2105         encode_nops(&hdr);
2106 }
2107
2108 /*
2109  * Encode CREATE request
2110  */
2111 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2112                                 const struct nfs4_create_arg *args)
2113 {
2114         struct compound_hdr hdr = {
2115                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2116         };
2117
2118         encode_compound_hdr(xdr, req, &hdr);
2119         encode_sequence(xdr, &args->seq_args, &hdr);
2120         encode_putfh(xdr, args->dir_fh, &hdr);
2121         encode_savefh(xdr, &hdr);
2122         encode_create(xdr, args, &hdr);
2123         encode_getfh(xdr, &hdr);
2124         encode_getfattr(xdr, args->bitmask, &hdr);
2125         encode_restorefh(xdr, &hdr);
2126         encode_getfattr(xdr, args->bitmask, &hdr);
2127         encode_nops(&hdr);
2128 }
2129
2130 /*
2131  * Encode SYMLINK request
2132  */
2133 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2134                                  const struct nfs4_create_arg *args)
2135 {
2136         nfs4_xdr_enc_create(req, xdr, args);
2137 }
2138
2139 /*
2140  * Encode GETATTR request
2141  */
2142 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2143                                  const struct nfs4_getattr_arg *args)
2144 {
2145         struct compound_hdr hdr = {
2146                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2147         };
2148
2149         encode_compound_hdr(xdr, req, &hdr);
2150         encode_sequence(xdr, &args->seq_args, &hdr);
2151         encode_putfh(xdr, args->fh, &hdr);
2152         encode_getfattr(xdr, args->bitmask, &hdr);
2153         encode_nops(&hdr);
2154 }
2155
2156 /*
2157  * Encode a CLOSE request
2158  */
2159 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2160                                struct nfs_closeargs *args)
2161 {
2162         struct compound_hdr hdr = {
2163                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2164         };
2165
2166         encode_compound_hdr(xdr, req, &hdr);
2167         encode_sequence(xdr, &args->seq_args, &hdr);
2168         encode_putfh(xdr, args->fh, &hdr);
2169         encode_close(xdr, args, &hdr);
2170         encode_getfattr(xdr, args->bitmask, &hdr);
2171         encode_nops(&hdr);
2172 }
2173
2174 /*
2175  * Encode an OPEN request
2176  */
2177 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2178                               struct nfs_openargs *args)
2179 {
2180         struct compound_hdr hdr = {
2181                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2182         };
2183
2184         encode_compound_hdr(xdr, req, &hdr);
2185         encode_sequence(xdr, &args->seq_args, &hdr);
2186         encode_putfh(xdr, args->fh, &hdr);
2187         encode_savefh(xdr, &hdr);
2188         encode_open(xdr, args, &hdr);
2189         encode_getfh(xdr, &hdr);
2190         encode_getfattr(xdr, args->bitmask, &hdr);
2191         encode_restorefh(xdr, &hdr);
2192         encode_getfattr(xdr, args->dir_bitmask, &hdr);
2193         encode_nops(&hdr);
2194 }
2195
2196 /*
2197  * Encode an OPEN_CONFIRM request
2198  */
2199 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2200                                       struct xdr_stream *xdr,
2201                                       struct nfs_open_confirmargs *args)
2202 {
2203         struct compound_hdr hdr = {
2204                 .nops   = 0,
2205         };
2206
2207         encode_compound_hdr(xdr, req, &hdr);
2208         encode_putfh(xdr, args->fh, &hdr);
2209         encode_open_confirm(xdr, args, &hdr);
2210         encode_nops(&hdr);
2211 }
2212
2213 /*
2214  * Encode an OPEN request with no attributes.
2215  */
2216 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2217                                      struct xdr_stream *xdr,
2218                                      struct nfs_openargs *args)
2219 {
2220         struct compound_hdr hdr = {
2221                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2222         };
2223
2224         encode_compound_hdr(xdr, req, &hdr);
2225         encode_sequence(xdr, &args->seq_args, &hdr);
2226         encode_putfh(xdr, args->fh, &hdr);
2227         encode_open(xdr, args, &hdr);
2228         encode_getfattr(xdr, args->bitmask, &hdr);
2229         encode_nops(&hdr);
2230 }
2231
2232 /*
2233  * Encode an OPEN_DOWNGRADE request
2234  */
2235 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2236                                         struct xdr_stream *xdr,
2237                                         struct nfs_closeargs *args)
2238 {
2239         struct compound_hdr hdr = {
2240                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2241         };
2242
2243         encode_compound_hdr(xdr, req, &hdr);
2244         encode_sequence(xdr, &args->seq_args, &hdr);
2245         encode_putfh(xdr, args->fh, &hdr);
2246         encode_open_downgrade(xdr, args, &hdr);
2247         encode_getfattr(xdr, args->bitmask, &hdr);
2248         encode_nops(&hdr);
2249 }
2250
2251 /*
2252  * Encode a LOCK request
2253  */
2254 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2255                               struct nfs_lock_args *args)
2256 {
2257         struct compound_hdr hdr = {
2258                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2259         };
2260
2261         encode_compound_hdr(xdr, req, &hdr);
2262         encode_sequence(xdr, &args->seq_args, &hdr);
2263         encode_putfh(xdr, args->fh, &hdr);
2264         encode_lock(xdr, args, &hdr);
2265         encode_nops(&hdr);
2266 }
2267
2268 /*
2269  * Encode a LOCKT request
2270  */
2271 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2272                                struct nfs_lockt_args *args)
2273 {
2274         struct compound_hdr hdr = {
2275                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2276         };
2277
2278         encode_compound_hdr(xdr, req, &hdr);
2279         encode_sequence(xdr, &args->seq_args, &hdr);
2280         encode_putfh(xdr, args->fh, &hdr);
2281         encode_lockt(xdr, args, &hdr);
2282         encode_nops(&hdr);
2283 }
2284
2285 /*
2286  * Encode a LOCKU request
2287  */
2288 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2289                                struct nfs_locku_args *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_locku(xdr, args, &hdr);
2299         encode_nops(&hdr);
2300 }
2301
2302 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2303                                            struct xdr_stream *xdr,
2304                                         struct nfs_release_lockowner_args *args)
2305 {
2306         struct compound_hdr hdr = {
2307                 .minorversion = 0,
2308         };
2309
2310         encode_compound_hdr(xdr, req, &hdr);
2311         encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2312         encode_nops(&hdr);
2313 }
2314
2315 /*
2316  * Encode a READLINK request
2317  */
2318 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2319                                   const struct nfs4_readlink *args)
2320 {
2321         struct compound_hdr hdr = {
2322                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2323         };
2324
2325         encode_compound_hdr(xdr, req, &hdr);
2326         encode_sequence(xdr, &args->seq_args, &hdr);
2327         encode_putfh(xdr, args->fh, &hdr);
2328         encode_readlink(xdr, args, req, &hdr);
2329
2330         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2331                         args->pgbase, args->pglen);
2332         encode_nops(&hdr);
2333 }
2334
2335 /*
2336  * Encode a READDIR request
2337  */
2338 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2339                                  const struct nfs4_readdir_arg *args)
2340 {
2341         struct compound_hdr hdr = {
2342                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2343         };
2344
2345         encode_compound_hdr(xdr, req, &hdr);
2346         encode_sequence(xdr, &args->seq_args, &hdr);
2347         encode_putfh(xdr, args->fh, &hdr);
2348         encode_readdir(xdr, args, req, &hdr);
2349
2350         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2351                          args->pgbase, args->count);
2352         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2353                         __func__, hdr.replen << 2, args->pages,
2354                         args->pgbase, args->count);
2355         encode_nops(&hdr);
2356 }
2357
2358 /*
2359  * Encode a READ request
2360  */
2361 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2362                               struct nfs_readargs *args)
2363 {
2364         struct compound_hdr hdr = {
2365                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2366         };
2367
2368         encode_compound_hdr(xdr, req, &hdr);
2369         encode_sequence(xdr, &args->seq_args, &hdr);
2370         encode_putfh(xdr, args->fh, &hdr);
2371         encode_read(xdr, args, &hdr);
2372
2373         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2374                          args->pages, args->pgbase, args->count);
2375         req->rq_rcv_buf.flags |= XDRBUF_READ;
2376         encode_nops(&hdr);
2377 }
2378
2379 /*
2380  * Encode an SETATTR request
2381  */
2382 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2383                                  struct nfs_setattrargs *args)
2384 {
2385         struct compound_hdr hdr = {
2386                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2387         };
2388
2389         encode_compound_hdr(xdr, req, &hdr);
2390         encode_sequence(xdr, &args->seq_args, &hdr);
2391         encode_putfh(xdr, args->fh, &hdr);
2392         encode_setattr(xdr, args, args->server, &hdr);
2393         encode_getfattr(xdr, args->bitmask, &hdr);
2394         encode_nops(&hdr);
2395 }
2396
2397 /*
2398  * Encode a GETACL request
2399  */
2400 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2401                                 struct nfs_getaclargs *args)
2402 {
2403         struct compound_hdr hdr = {
2404                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2405         };
2406         uint32_t replen;
2407
2408         encode_compound_hdr(xdr, req, &hdr);
2409         encode_sequence(xdr, &args->seq_args, &hdr);
2410         encode_putfh(xdr, args->fh, &hdr);
2411         replen = hdr.replen + op_decode_hdr_maxsz + 1;
2412         encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2413
2414         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2415                 args->acl_pages, args->acl_pgbase, args->acl_len);
2416
2417         encode_nops(&hdr);
2418 }
2419
2420 /*
2421  * Encode a WRITE request
2422  */
2423 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2424                                struct nfs_writeargs *args)
2425 {
2426         struct compound_hdr hdr = {
2427                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2428         };
2429
2430         encode_compound_hdr(xdr, req, &hdr);
2431         encode_sequence(xdr, &args->seq_args, &hdr);
2432         encode_putfh(xdr, args->fh, &hdr);
2433         encode_write(xdr, args, &hdr);
2434         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2435         if (args->bitmask)
2436                 encode_getfattr(xdr, args->bitmask, &hdr);
2437         encode_nops(&hdr);
2438 }
2439
2440 /*
2441  *  a COMMIT request
2442  */
2443 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2444                                 struct nfs_writeargs *args)
2445 {
2446         struct compound_hdr hdr = {
2447                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2448         };
2449
2450         encode_compound_hdr(xdr, req, &hdr);
2451         encode_sequence(xdr, &args->seq_args, &hdr);
2452         encode_putfh(xdr, args->fh, &hdr);
2453         encode_commit(xdr, args, &hdr);
2454         if (args->bitmask)
2455                 encode_getfattr(xdr, args->bitmask, &hdr);
2456         encode_nops(&hdr);
2457 }
2458
2459 /*
2460  * FSINFO request
2461  */
2462 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2463                                 struct nfs4_fsinfo_arg *args)
2464 {
2465         struct compound_hdr hdr = {
2466                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2467         };
2468
2469         encode_compound_hdr(xdr, req, &hdr);
2470         encode_sequence(xdr, &args->seq_args, &hdr);
2471         encode_putfh(xdr, args->fh, &hdr);
2472         encode_fsinfo(xdr, args->bitmask, &hdr);
2473         encode_nops(&hdr);
2474 }
2475
2476 /*
2477  * a PATHCONF request
2478  */
2479 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2480                                   const struct nfs4_pathconf_arg *args)
2481 {
2482         struct compound_hdr hdr = {
2483                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2484         };
2485
2486         encode_compound_hdr(xdr, req, &hdr);
2487         encode_sequence(xdr, &args->seq_args, &hdr);
2488         encode_putfh(xdr, args->fh, &hdr);
2489         encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2490                            &hdr);
2491         encode_nops(&hdr);
2492 }
2493
2494 /*
2495  * a STATFS request
2496  */
2497 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2498                                 const struct nfs4_statfs_arg *args)
2499 {
2500         struct compound_hdr hdr = {
2501                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2502         };
2503
2504         encode_compound_hdr(xdr, req, &hdr);
2505         encode_sequence(xdr, &args->seq_args, &hdr);
2506         encode_putfh(xdr, args->fh, &hdr);
2507         encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2508                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2509         encode_nops(&hdr);
2510 }
2511
2512 /*
2513  * GETATTR_BITMAP request
2514  */
2515 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2516                                      struct xdr_stream *xdr,
2517                                      struct nfs4_server_caps_arg *args)
2518 {
2519         struct compound_hdr hdr = {
2520                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2521         };
2522
2523         encode_compound_hdr(xdr, req, &hdr);
2524         encode_sequence(xdr, &args->seq_args, &hdr);
2525         encode_putfh(xdr, args->fhandle, &hdr);
2526         encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2527                            FATTR4_WORD0_FH_EXPIRE_TYPE|
2528                            FATTR4_WORD0_LINK_SUPPORT|
2529                            FATTR4_WORD0_SYMLINK_SUPPORT|
2530                            FATTR4_WORD0_ACLSUPPORT, &hdr);
2531         encode_nops(&hdr);
2532 }
2533
2534 /*
2535  * a RENEW request
2536  */
2537 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2538                                struct nfs_client *clp)
2539 {
2540         struct compound_hdr hdr = {
2541                 .nops   = 0,
2542         };
2543
2544         encode_compound_hdr(xdr, req, &hdr);
2545         encode_renew(xdr, clp->cl_clientid, &hdr);
2546         encode_nops(&hdr);
2547 }
2548
2549 /*
2550  * a SETCLIENTID request
2551  */
2552 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2553                                      struct xdr_stream *xdr,
2554                                      struct nfs4_setclientid *sc)
2555 {
2556         struct compound_hdr hdr = {
2557                 .nops   = 0,
2558         };
2559
2560         encode_compound_hdr(xdr, req, &hdr);
2561         encode_setclientid(xdr, sc, &hdr);
2562         encode_nops(&hdr);
2563 }
2564
2565 /*
2566  * a SETCLIENTID_CONFIRM request
2567  */
2568 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2569                                              struct xdr_stream *xdr,
2570                                              struct nfs4_setclientid_res *arg)
2571 {
2572         struct compound_hdr hdr = {
2573                 .nops   = 0,
2574         };
2575         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2576
2577         encode_compound_hdr(xdr, req, &hdr);
2578         encode_setclientid_confirm(xdr, arg, &hdr);
2579         encode_putrootfh(xdr, &hdr);
2580         encode_fsinfo(xdr, lease_bitmap, &hdr);
2581         encode_nops(&hdr);
2582 }
2583
2584 /*
2585  * DELEGRETURN request
2586  */
2587 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2588                                      struct xdr_stream *xdr,
2589                                      const struct nfs4_delegreturnargs *args)
2590 {
2591         struct compound_hdr hdr = {
2592                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2593         };
2594
2595         encode_compound_hdr(xdr, req, &hdr);
2596         encode_sequence(xdr, &args->seq_args, &hdr);
2597         encode_putfh(xdr, args->fhandle, &hdr);
2598         encode_delegreturn(xdr, args->stateid, &hdr);
2599         encode_getfattr(xdr, args->bitmask, &hdr);
2600         encode_nops(&hdr);
2601 }
2602
2603 /*
2604  * Encode FS_LOCATIONS request
2605  */
2606 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2607                                       struct xdr_stream *xdr,
2608                                       struct nfs4_fs_locations_arg *args)
2609 {
2610         struct compound_hdr hdr = {
2611                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2612         };
2613         uint32_t replen;
2614
2615         encode_compound_hdr(xdr, req, &hdr);
2616         encode_sequence(xdr, &args->seq_args, &hdr);
2617         encode_putfh(xdr, args->dir_fh, &hdr);
2618         encode_lookup(xdr, args->name, &hdr);
2619         replen = hdr.replen;    /* get the attribute into args->page */
2620         encode_fs_locations(xdr, args->bitmask, &hdr);
2621
2622         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2623                         0, PAGE_SIZE);
2624         encode_nops(&hdr);
2625 }
2626
2627 /*
2628  * Encode SECINFO request
2629  */
2630 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2631                                 struct xdr_stream *xdr,
2632                                 struct nfs4_secinfo_arg *args)
2633 {
2634         struct compound_hdr hdr = {
2635                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2636         };
2637
2638         encode_compound_hdr(xdr, req, &hdr);
2639         encode_sequence(xdr, &args->seq_args, &hdr);
2640         encode_putfh(xdr, args->dir_fh, &hdr);
2641         encode_secinfo(xdr, args->name, &hdr);
2642         encode_nops(&hdr);
2643 }
2644
2645 #if defined(CONFIG_NFS_V4_1)
2646 /*
2647  * EXCHANGE_ID request
2648  */
2649 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2650                                      struct xdr_stream *xdr,
2651                                      struct nfs41_exchange_id_args *args)
2652 {
2653         struct compound_hdr hdr = {
2654                 .minorversion = args->client->cl_mvops->minor_version,
2655         };
2656
2657         encode_compound_hdr(xdr, req, &hdr);
2658         encode_exchange_id(xdr, args, &hdr);
2659         encode_nops(&hdr);
2660 }
2661
2662 /*
2663  * a CREATE_SESSION request
2664  */
2665 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2666                                         struct xdr_stream *xdr,
2667                                         struct nfs41_create_session_args *args)
2668 {
2669         struct compound_hdr hdr = {
2670                 .minorversion = args->client->cl_mvops->minor_version,
2671         };
2672
2673         encode_compound_hdr(xdr, req, &hdr);
2674         encode_create_session(xdr, args, &hdr);
2675         encode_nops(&hdr);
2676 }
2677
2678 /*
2679  * a DESTROY_SESSION request
2680  */
2681 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2682                                          struct xdr_stream *xdr,
2683                                          struct nfs4_session *session)
2684 {
2685         struct compound_hdr hdr = {
2686                 .minorversion = session->clp->cl_mvops->minor_version,
2687         };
2688
2689         encode_compound_hdr(xdr, req, &hdr);
2690         encode_destroy_session(xdr, session, &hdr);
2691         encode_nops(&hdr);
2692 }
2693
2694 /*
2695  * a SEQUENCE request
2696  */
2697 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2698                                   struct nfs4_sequence_args *args)
2699 {
2700         struct compound_hdr hdr = {
2701                 .minorversion = nfs4_xdr_minorversion(args),
2702         };
2703
2704         encode_compound_hdr(xdr, req, &hdr);
2705         encode_sequence(xdr, args, &hdr);
2706         encode_nops(&hdr);
2707 }
2708
2709 /*
2710  * a GET_LEASE_TIME request
2711  */
2712 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2713                                         struct xdr_stream *xdr,
2714                                         struct nfs4_get_lease_time_args *args)
2715 {
2716         struct compound_hdr hdr = {
2717                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2718         };
2719         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2720
2721         encode_compound_hdr(xdr, req, &hdr);
2722         encode_sequence(xdr, &args->la_seq_args, &hdr);
2723         encode_putrootfh(xdr, &hdr);
2724         encode_fsinfo(xdr, lease_bitmap, &hdr);
2725         encode_nops(&hdr);
2726 }
2727
2728 /*
2729  * a RECLAIM_COMPLETE request
2730  */
2731 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2732                                           struct xdr_stream *xdr,
2733                                 struct nfs41_reclaim_complete_args *args)
2734 {
2735         struct compound_hdr hdr = {
2736                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2737         };
2738
2739         encode_compound_hdr(xdr, req, &hdr);
2740         encode_sequence(xdr, &args->seq_args, &hdr);
2741         encode_reclaim_complete(xdr, args, &hdr);
2742         encode_nops(&hdr);
2743 }
2744
2745 /*
2746  * Encode GETDEVICELIST request
2747  */
2748 static void nfs4_xdr_enc_getdevicelist(struct rpc_rqst *req,
2749                                        struct xdr_stream *xdr,
2750                                        struct nfs4_getdevicelist_args *args)
2751 {
2752         struct compound_hdr hdr = {
2753                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2754         };
2755
2756         encode_compound_hdr(xdr, req, &hdr);
2757         encode_sequence(xdr, &args->seq_args, &hdr);
2758         encode_putfh(xdr, args->fh, &hdr);
2759         encode_getdevicelist(xdr, args, &hdr);
2760         encode_nops(&hdr);
2761 }
2762
2763 /*
2764  * Encode GETDEVICEINFO request
2765  */
2766 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2767                                        struct xdr_stream *xdr,
2768                                        struct nfs4_getdeviceinfo_args *args)
2769 {
2770         struct compound_hdr hdr = {
2771                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2772         };
2773
2774         encode_compound_hdr(xdr, req, &hdr);
2775         encode_sequence(xdr, &args->seq_args, &hdr);
2776         encode_getdeviceinfo(xdr, args, &hdr);
2777
2778         /* set up reply kvec. Subtract notification bitmap max size (2)
2779          * so that notification bitmap is put in xdr_buf tail */
2780         xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2781                          args->pdev->pages, args->pdev->pgbase,
2782                          args->pdev->pglen);
2783
2784         encode_nops(&hdr);
2785 }
2786
2787 /*
2788  *  Encode LAYOUTGET request
2789  */
2790 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2791                                    struct xdr_stream *xdr,
2792                                    struct nfs4_layoutget_args *args)
2793 {
2794         struct compound_hdr hdr = {
2795                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2796         };
2797
2798         encode_compound_hdr(xdr, req, &hdr);
2799         encode_sequence(xdr, &args->seq_args, &hdr);
2800         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2801         encode_layoutget(xdr, args, &hdr);
2802
2803         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2804             args->layout.pages, 0, args->layout.pglen);
2805
2806         encode_nops(&hdr);
2807 }
2808
2809 /*
2810  *  Encode LAYOUTCOMMIT request
2811  */
2812 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2813                                       struct xdr_stream *xdr,
2814                                       struct nfs4_layoutcommit_args *args)
2815 {
2816         struct nfs4_layoutcommit_data *data =
2817                 container_of(args, struct nfs4_layoutcommit_data, args);
2818         struct compound_hdr hdr = {
2819                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2820         };
2821
2822         encode_compound_hdr(xdr, req, &hdr);
2823         encode_sequence(xdr, &args->seq_args, &hdr);
2824         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2825         encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2826         encode_getfattr(xdr, args->bitmask, &hdr);
2827         encode_nops(&hdr);
2828 }
2829
2830 /*
2831  * Encode LAYOUTRETURN request
2832  */
2833 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2834                                       struct xdr_stream *xdr,
2835                                       struct nfs4_layoutreturn_args *args)
2836 {
2837         struct compound_hdr hdr = {
2838                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2839         };
2840
2841         encode_compound_hdr(xdr, req, &hdr);
2842         encode_sequence(xdr, &args->seq_args, &hdr);
2843         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2844         encode_layoutreturn(xdr, args, &hdr);
2845         encode_nops(&hdr);
2846 }
2847
2848 /*
2849  * Encode SECINFO_NO_NAME request
2850  */
2851 static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
2852                                         struct xdr_stream *xdr,
2853                                         struct nfs41_secinfo_no_name_args *args)
2854 {
2855         struct compound_hdr hdr = {
2856                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2857         };
2858
2859         encode_compound_hdr(xdr, req, &hdr);
2860         encode_sequence(xdr, &args->seq_args, &hdr);
2861         encode_putrootfh(xdr, &hdr);
2862         encode_secinfo_no_name(xdr, args, &hdr);
2863         encode_nops(&hdr);
2864         return 0;
2865 }
2866
2867 /*
2868  *  Encode TEST_STATEID request
2869  */
2870 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
2871                                       struct xdr_stream *xdr,
2872                                       struct nfs41_test_stateid_args *args)
2873 {
2874         struct compound_hdr hdr = {
2875                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2876         };
2877
2878         encode_compound_hdr(xdr, req, &hdr);
2879         encode_sequence(xdr, &args->seq_args, &hdr);
2880         encode_test_stateid(xdr, args, &hdr);
2881         encode_nops(&hdr);
2882 }
2883
2884 /*
2885  *  Encode FREE_STATEID request
2886  */
2887 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
2888                                      struct xdr_stream *xdr,
2889                                      struct nfs41_free_stateid_args *args)
2890 {
2891         struct compound_hdr hdr = {
2892                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2893         };
2894
2895         encode_compound_hdr(xdr, req, &hdr);
2896         encode_sequence(xdr, &args->seq_args, &hdr);
2897         encode_free_stateid(xdr, args, &hdr);
2898         encode_nops(&hdr);
2899 }
2900 #endif /* CONFIG_NFS_V4_1 */
2901
2902 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
2903 {
2904         dprintk("nfs: %s: prematurely hit end of receive buffer. "
2905                 "Remaining buffer length is %tu words.\n",
2906                 func, xdr->end - xdr->p);
2907 }
2908
2909 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2910 {
2911         __be32 *p;
2912
2913         p = xdr_inline_decode(xdr, 4);
2914         if (unlikely(!p))
2915                 goto out_overflow;
2916         *len = be32_to_cpup(p);
2917         p = xdr_inline_decode(xdr, *len);
2918         if (unlikely(!p))
2919                 goto out_overflow;
2920         *string = (char *)p;
2921         return 0;
2922 out_overflow:
2923         print_overflow_msg(__func__, xdr);
2924         return -EIO;
2925 }
2926
2927 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2928 {
2929         __be32 *p;
2930
2931         p = xdr_inline_decode(xdr, 8);
2932         if (unlikely(!p))
2933                 goto out_overflow;
2934         hdr->status = be32_to_cpup(p++);
2935         hdr->taglen = be32_to_cpup(p);
2936
2937         p = xdr_inline_decode(xdr, hdr->taglen + 4);
2938         if (unlikely(!p))
2939                 goto out_overflow;
2940         hdr->tag = (char *)p;
2941         p += XDR_QUADLEN(hdr->taglen);
2942         hdr->nops = be32_to_cpup(p);
2943         if (unlikely(hdr->nops < 1))
2944                 return nfs4_stat_to_errno(hdr->status);
2945         return 0;
2946 out_overflow:
2947         print_overflow_msg(__func__, xdr);
2948         return -EIO;
2949 }
2950
2951 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2952 {
2953         __be32 *p;
2954         uint32_t opnum;
2955         int32_t nfserr;
2956
2957         p = xdr_inline_decode(xdr, 8);
2958         if (unlikely(!p))
2959                 goto out_overflow;
2960         opnum = be32_to_cpup(p++);
2961         if (opnum != expected) {
2962                 dprintk("nfs: Server returned operation"
2963                         " %d but we issued a request for %d\n",
2964                                 opnum, expected);
2965                 return -EIO;
2966         }
2967         nfserr = be32_to_cpup(p);
2968         if (nfserr != NFS_OK)
2969                 return nfs4_stat_to_errno(nfserr);
2970         return 0;
2971 out_overflow:
2972         print_overflow_msg(__func__, xdr);
2973         return -EIO;
2974 }
2975
2976 /* Dummy routine */
2977 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2978 {
2979         __be32 *p;
2980         unsigned int strlen;
2981         char *str;
2982
2983         p = xdr_inline_decode(xdr, 12);
2984         if (likely(p))
2985                 return decode_opaque_inline(xdr, &strlen, &str);
2986         print_overflow_msg(__func__, xdr);
2987         return -EIO;
2988 }
2989
2990 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2991 {
2992         uint32_t bmlen;
2993         __be32 *p;
2994
2995         p = xdr_inline_decode(xdr, 4);
2996         if (unlikely(!p))
2997                 goto out_overflow;
2998         bmlen = be32_to_cpup(p);
2999
3000         bitmap[0] = bitmap[1] = bitmap[2] = 0;
3001         p = xdr_inline_decode(xdr, (bmlen << 2));
3002         if (unlikely(!p))
3003                 goto out_overflow;
3004         if (bmlen > 0) {
3005                 bitmap[0] = be32_to_cpup(p++);
3006                 if (bmlen > 1) {
3007                         bitmap[1] = be32_to_cpup(p++);
3008                         if (bmlen > 2)
3009                                 bitmap[2] = be32_to_cpup(p);
3010                 }
3011         }
3012         return 0;
3013 out_overflow:
3014         print_overflow_msg(__func__, xdr);
3015         return -EIO;
3016 }
3017
3018 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
3019 {
3020         __be32 *p;
3021
3022         p = xdr_inline_decode(xdr, 4);
3023         if (unlikely(!p))
3024                 goto out_overflow;
3025         *attrlen = be32_to_cpup(p);
3026         *savep = xdr->p;
3027         return 0;
3028 out_overflow:
3029         print_overflow_msg(__func__, xdr);
3030         return -EIO;
3031 }
3032
3033 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3034 {
3035         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3036                 int ret;
3037                 ret = decode_attr_bitmap(xdr, bitmask);
3038                 if (unlikely(ret < 0))
3039                         return ret;
3040                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3041         } else
3042                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3043         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3044                 bitmask[0], bitmask[1], bitmask[2]);
3045         return 0;
3046 }
3047
3048 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3049 {
3050         __be32 *p;
3051         int ret = 0;
3052
3053         *type = 0;
3054         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3055                 return -EIO;
3056         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3057                 p = xdr_inline_decode(xdr, 4);
3058                 if (unlikely(!p))
3059                         goto out_overflow;
3060                 *type = be32_to_cpup(p);
3061                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3062                         dprintk("%s: bad type %d\n", __func__, *type);
3063                         return -EIO;
3064                 }
3065                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3066                 ret = NFS_ATTR_FATTR_TYPE;
3067         }
3068         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3069         return ret;
3070 out_overflow:
3071         print_overflow_msg(__func__, xdr);
3072         return -EIO;
3073 }
3074
3075 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3076                                       uint32_t *bitmap, uint32_t *type)
3077 {
3078         __be32 *p;
3079
3080         *type = 0;
3081         if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3082                 return -EIO;
3083         if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3084                 p = xdr_inline_decode(xdr, 4);
3085                 if (unlikely(!p))
3086                         goto out_overflow;
3087                 *type = be32_to_cpup(p);
3088                 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3089         }
3090         dprintk("%s: expire type=0x%x\n", __func__, *type);
3091         return 0;
3092 out_overflow:
3093         print_overflow_msg(__func__, xdr);
3094         return -EIO;
3095 }
3096
3097 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3098 {
3099         __be32 *p;
3100         int ret = 0;
3101
3102         *change = 0;
3103         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3104                 return -EIO;
3105         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3106                 p = xdr_inline_decode(xdr, 8);
3107                 if (unlikely(!p))
3108                         goto out_overflow;
3109                 xdr_decode_hyper(p, change);
3110                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3111                 ret = NFS_ATTR_FATTR_CHANGE;
3112         }
3113         dprintk("%s: change attribute=%Lu\n", __func__,
3114                         (unsigned long long)*change);
3115         return ret;
3116 out_overflow:
3117         print_overflow_msg(__func__, xdr);
3118         return -EIO;
3119 }
3120
3121 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3122 {
3123         __be32 *p;
3124         int ret = 0;
3125
3126         *size = 0;
3127         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3128                 return -EIO;
3129         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3130                 p = xdr_inline_decode(xdr, 8);
3131                 if (unlikely(!p))
3132                         goto out_overflow;
3133                 xdr_decode_hyper(p, size);
3134                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3135                 ret = NFS_ATTR_FATTR_SIZE;
3136         }
3137         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3138         return ret;
3139 out_overflow:
3140         print_overflow_msg(__func__, xdr);
3141         return -EIO;
3142 }
3143
3144 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3145 {
3146         __be32 *p;
3147
3148         *res = 0;
3149         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3150                 return -EIO;
3151         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3152                 p = xdr_inline_decode(xdr, 4);
3153                 if (unlikely(!p))
3154                         goto out_overflow;
3155                 *res = be32_to_cpup(p);
3156                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3157         }
3158         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3159         return 0;
3160 out_overflow:
3161         print_overflow_msg(__func__, xdr);
3162         return -EIO;
3163 }
3164
3165 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3166 {
3167         __be32 *p;
3168
3169         *res = 0;
3170         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3171                 return -EIO;
3172         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3173                 p = xdr_inline_decode(xdr, 4);
3174                 if (unlikely(!p))
3175                         goto out_overflow;
3176                 *res = be32_to_cpup(p);
3177                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3178         }
3179         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3180         return 0;
3181 out_overflow:
3182         print_overflow_msg(__func__, xdr);
3183         return -EIO;
3184 }
3185
3186 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3187 {
3188         __be32 *p;
3189         int ret = 0;
3190
3191         fsid->major = 0;
3192         fsid->minor = 0;
3193         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3194                 return -EIO;
3195         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3196                 p = xdr_inline_decode(xdr, 16);
3197                 if (unlikely(!p))
3198                         goto out_overflow;
3199                 p = xdr_decode_hyper(p, &fsid->major);
3200                 xdr_decode_hyper(p, &fsid->minor);
3201                 bitmap[0] &= ~FATTR4_WORD0_FSID;
3202                 ret = NFS_ATTR_FATTR_FSID;
3203         }
3204         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3205                         (unsigned long long)fsid->major,
3206                         (unsigned long long)fsid->minor);
3207         return ret;
3208 out_overflow:
3209         print_overflow_msg(__func__, xdr);
3210         return -EIO;
3211 }
3212
3213 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3214 {
3215         __be32 *p;
3216
3217         *res = 60;
3218         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3219                 return -EIO;
3220         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3221                 p = xdr_inline_decode(xdr, 4);
3222                 if (unlikely(!p))
3223                         goto out_overflow;
3224                 *res = be32_to_cpup(p);
3225                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3226         }
3227         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3228         return 0;
3229 out_overflow:
3230         print_overflow_msg(__func__, xdr);
3231         return -EIO;
3232 }
3233
3234 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3235 {
3236         __be32 *p;
3237
3238         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3239                 return -EIO;
3240         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3241                 p = xdr_inline_decode(xdr, 4);
3242                 if (unlikely(!p))
3243                         goto out_overflow;
3244                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3245                 *res = -be32_to_cpup(p);
3246         }
3247         return 0;
3248 out_overflow:
3249         print_overflow_msg(__func__, xdr);
3250         return -EIO;
3251 }
3252
3253 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3254 {
3255         __be32 *p;
3256         int len;
3257
3258         if (fh != NULL)
3259                 memset(fh, 0, sizeof(*fh));
3260
3261         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3262                 return -EIO;
3263         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3264                 p = xdr_inline_decode(xdr, 4);
3265                 if (unlikely(!p))
3266                         goto out_overflow;
3267                 len = be32_to_cpup(p);
3268                 if (len > NFS4_FHSIZE)
3269                         return -EIO;
3270                 p = xdr_inline_decode(xdr, len);
3271                 if (unlikely(!p))
3272                         goto out_overflow;
3273                 if (fh != NULL) {
3274                         memcpy(fh->data, p, len);
3275                         fh->size = len;
3276                 }
3277                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3278         }
3279         return 0;
3280 out_overflow:
3281         print_overflow_msg(__func__, xdr);
3282         return -EIO;
3283 }
3284
3285 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3286 {
3287         __be32 *p;
3288
3289         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
3290         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3291                 return -EIO;
3292         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3293                 p = xdr_inline_decode(xdr, 4);
3294                 if (unlikely(!p))
3295                         goto out_overflow;
3296                 *res = be32_to_cpup(p);
3297                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3298         }
3299         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3300         return 0;
3301 out_overflow:
3302         print_overflow_msg(__func__, xdr);
3303         return -EIO;
3304 }
3305
3306 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3307 {
3308         __be32 *p;
3309         int ret = 0;
3310
3311         *fileid = 0;
3312         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3313                 return -EIO;
3314         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3315                 p = xdr_inline_decode(xdr, 8);
3316                 if (unlikely(!p))
3317                         goto out_overflow;
3318                 xdr_decode_hyper(p, fileid);
3319                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3320                 ret = NFS_ATTR_FATTR_FILEID;
3321         }
3322         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3323         return ret;
3324 out_overflow:
3325         print_overflow_msg(__func__, xdr);
3326         return -EIO;
3327 }
3328
3329 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3330 {
3331         __be32 *p;
3332         int ret = 0;
3333
3334         *fileid = 0;
3335         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3336                 return -EIO;
3337         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3338                 p = xdr_inline_decode(xdr, 8);
3339                 if (unlikely(!p))
3340                         goto out_overflow;
3341                 xdr_decode_hyper(p, fileid);
3342                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3343                 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3344         }
3345         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3346         return ret;
3347 out_overflow:
3348         print_overflow_msg(__func__, xdr);
3349         return -EIO;
3350 }
3351
3352 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3353 {
3354         __be32 *p;
3355         int status = 0;
3356
3357         *res = 0;
3358         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3359                 return -EIO;
3360         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3361                 p = xdr_inline_decode(xdr, 8);
3362                 if (unlikely(!p))
3363                         goto out_overflow;
3364                 xdr_decode_hyper(p, res);
3365                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3366         }
3367         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3368         return status;
3369 out_overflow:
3370         print_overflow_msg(__func__, xdr);
3371         return -EIO;
3372 }
3373
3374 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3375 {
3376         __be32 *p;
3377         int status = 0;
3378
3379         *res = 0;
3380         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3381                 return -EIO;
3382         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3383                 p = xdr_inline_decode(xdr, 8);
3384                 if (unlikely(!p))
3385                         goto out_overflow;
3386                 xdr_decode_hyper(p, res);
3387                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3388         }
3389         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3390         return status;
3391 out_overflow:
3392         print_overflow_msg(__func__, xdr);
3393         return -EIO;
3394 }
3395
3396 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3397 {
3398         __be32 *p;
3399         int status = 0;
3400
3401         *res = 0;
3402         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3403                 return -EIO;
3404         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3405                 p = xdr_inline_decode(xdr, 8);
3406                 if (unlikely(!p))
3407                         goto out_overflow;
3408                 xdr_decode_hyper(p, res);
3409                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3410         }
3411         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3412         return status;
3413 out_overflow:
3414         print_overflow_msg(__func__, xdr);
3415         return -EIO;
3416 }
3417
3418 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3419 {
3420         u32 n;
3421         __be32 *p;
3422         int status = 0;
3423
3424         p = xdr_inline_decode(xdr, 4);
3425         if (unlikely(!p))
3426                 goto out_overflow;
3427         n = be32_to_cpup(p);
3428         if (n == 0)
3429                 goto root_path;
3430         dprintk("pathname4: ");
3431         path->ncomponents = 0;
3432         while (path->ncomponents < n) {
3433                 struct nfs4_string *component = &path->components[path->ncomponents];
3434                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3435                 if (unlikely(status != 0))
3436                         goto out_eio;
3437                 if (unlikely(nfs_debug & NFSDBG_XDR))
3438                         pr_cont("%s%.*s ",
3439                                 (path->ncomponents != n ? "/ " : ""),
3440                                 component->len, component->data);
3441                 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
3442                         path->ncomponents++;
3443                 else {
3444                         dprintk("cannot parse %d components in path\n", n);
3445                         goto out_eio;
3446                 }
3447         }
3448 out:
3449         return status;
3450 root_path:
3451 /* a root pathname is sent as a zero component4 */
3452         path->ncomponents = 1;
3453         path->components[0].len=0;
3454         path->components[0].data=NULL;
3455         dprintk("pathname4: /\n");
3456         goto out;
3457 out_eio:
3458         dprintk(" status %d", status);
3459         status = -EIO;
3460         goto out;
3461 out_overflow:
3462         print_overflow_msg(__func__, xdr);
3463         return -EIO;
3464 }
3465
3466 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3467 {
3468         int n;
3469         __be32 *p;
3470         int status = -EIO;
3471
3472         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3473                 goto out;
3474         status = 0;
3475         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3476                 goto out;
3477         status = -EIO;
3478         /* Ignore borken servers that return unrequested attrs */
3479         if (unlikely(res == NULL))
3480                 goto out;
3481         dprintk("%s: fsroot:\n", __func__);
3482         status = decode_pathname(xdr, &res->fs_path);
3483         if (unlikely(status != 0))
3484                 goto out;
3485         p = xdr_inline_decode(xdr, 4);
3486         if (unlikely(!p))
3487                 goto out_overflow;
3488         n = be32_to_cpup(p);
3489         if (n <= 0)
3490                 goto out_eio;
3491         res->nlocations = 0;
3492         while (res->nlocations < n) {
3493                 u32 m;
3494                 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
3495
3496                 p = xdr_inline_decode(xdr, 4);
3497                 if (unlikely(!p))
3498                         goto out_overflow;
3499                 m = be32_to_cpup(p);
3500
3501                 loc->nservers = 0;
3502                 dprintk("%s: servers:\n", __func__);
3503                 while (loc->nservers < m) {
3504                         struct nfs4_string *server = &loc->servers[loc->nservers];
3505                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3506                         if (unlikely(status != 0))
3507                                 goto out_eio;
3508                         dprintk("%s ", server->data);
3509                         if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
3510                                 loc->nservers++;
3511                         else {
3512                                 unsigned int i;
3513                                 dprintk("%s: using first %u of %u servers "
3514                                         "returned for location %u\n",
3515                                                 __func__,
3516                                                 NFS4_FS_LOCATION_MAXSERVERS,
3517                                                 m, res->nlocations);
3518                                 for (i = loc->nservers; i < m; i++) {
3519                                         unsigned int len;
3520                                         char *data;
3521                                         status = decode_opaque_inline(xdr, &len, &data);
3522                                         if (unlikely(status != 0))
3523                                                 goto out_eio;
3524                                 }
3525                         }
3526                 }
3527                 status = decode_pathname(xdr, &loc->rootpath);
3528                 if (unlikely(status != 0))
3529                         goto out_eio;
3530                 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
3531                         res->nlocations++;
3532         }
3533         if (res->nlocations != 0)
3534                 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3535 out:
3536         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3537         return status;
3538 out_overflow:
3539         print_overflow_msg(__func__, xdr);
3540 out_eio:
3541         status = -EIO;
3542         goto out;
3543 }
3544
3545 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3546 {
3547         __be32 *p;
3548         int status = 0;
3549
3550         *res = 0;
3551         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3552                 return -EIO;
3553         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3554                 p = xdr_inline_decode(xdr, 8);
3555                 if (unlikely(!p))
3556                         goto out_overflow;
3557                 xdr_decode_hyper(p, res);
3558                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3559         }
3560         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3561         return status;
3562 out_overflow:
3563         print_overflow_msg(__func__, xdr);
3564         return -EIO;
3565 }
3566
3567 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3568 {
3569         __be32 *p;
3570         int status = 0;
3571
3572         *maxlink = 1;
3573         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3574                 return -EIO;
3575         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3576                 p = xdr_inline_decode(xdr, 4);
3577                 if (unlikely(!p))
3578                         goto out_overflow;
3579                 *maxlink = be32_to_cpup(p);
3580                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3581         }
3582         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3583         return status;
3584 out_overflow:
3585         print_overflow_msg(__func__, xdr);
3586         return -EIO;
3587 }
3588
3589 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3590 {
3591         __be32 *p;
3592         int status = 0;
3593
3594         *maxname = 1024;
3595         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3596                 return -EIO;
3597         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3598                 p = xdr_inline_decode(xdr, 4);
3599                 if (unlikely(!p))
3600                         goto out_overflow;
3601                 *maxname = be32_to_cpup(p);
3602                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3603         }
3604         dprintk("%s: maxname=%u\n", __func__, *maxname);
3605         return status;
3606 out_overflow:
3607         print_overflow_msg(__func__, xdr);
3608         return -EIO;
3609 }
3610
3611 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3612 {
3613         __be32 *p;
3614         int status = 0;
3615
3616         *res = 1024;
3617         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3618                 return -EIO;
3619         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3620                 uint64_t maxread;
3621                 p = xdr_inline_decode(xdr, 8);
3622                 if (unlikely(!p))
3623                         goto out_overflow;
3624                 xdr_decode_hyper(p, &maxread);
3625                 if (maxread > 0x7FFFFFFF)
3626                         maxread = 0x7FFFFFFF;
3627                 *res = (uint32_t)maxread;
3628                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3629         }
3630         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3631         return status;
3632 out_overflow:
3633         print_overflow_msg(__func__, xdr);
3634         return -EIO;
3635 }
3636
3637 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3638 {
3639         __be32 *p;
3640         int status = 0;
3641
3642         *res = 1024;
3643         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3644                 return -EIO;
3645         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3646                 uint64_t maxwrite;
3647                 p = xdr_inline_decode(xdr, 8);
3648                 if (unlikely(!p))
3649                         goto out_overflow;
3650                 xdr_decode_hyper(p, &maxwrite);
3651                 if (maxwrite > 0x7FFFFFFF)
3652                         maxwrite = 0x7FFFFFFF;
3653                 *res = (uint32_t)maxwrite;
3654                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3655         }
3656         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3657         return status;
3658 out_overflow:
3659         print_overflow_msg(__func__, xdr);
3660         return -EIO;
3661 }
3662
3663 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3664 {
3665         uint32_t tmp;
3666         __be32 *p;
3667         int ret = 0;
3668
3669         *mode = 0;
3670         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3671                 return -EIO;
3672         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3673                 p = xdr_inline_decode(xdr, 4);
3674                 if (unlikely(!p))
3675                         goto out_overflow;
3676                 tmp = be32_to_cpup(p);
3677                 *mode = tmp & ~S_IFMT;
3678                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3679                 ret = NFS_ATTR_FATTR_MODE;
3680         }
3681         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3682         return ret;
3683 out_overflow:
3684         print_overflow_msg(__func__, xdr);
3685         return -EIO;
3686 }
3687
3688 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3689 {
3690         __be32 *p;
3691         int ret = 0;
3692
3693         *nlink = 1;
3694         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3695                 return -EIO;
3696         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3697                 p = xdr_inline_decode(xdr, 4);
3698                 if (unlikely(!p))
3699                         goto out_overflow;
3700                 *nlink = be32_to_cpup(p);
3701                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3702                 ret = NFS_ATTR_FATTR_NLINK;
3703         }
3704         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3705         return ret;
3706 out_overflow:
3707         print_overflow_msg(__func__, xdr);
3708         return -EIO;
3709 }
3710
3711 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3712                 const struct nfs_server *server, uint32_t *uid,
3713                 struct nfs4_string *owner_name)
3714 {
3715         uint32_t len;
3716         __be32 *p;
3717         int ret = 0;
3718
3719         *uid = -2;
3720         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3721                 return -EIO;
3722         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3723                 p = xdr_inline_decode(xdr, 4);
3724                 if (unlikely(!p))
3725                         goto out_overflow;
3726                 len = be32_to_cpup(p);
3727                 p = xdr_inline_decode(xdr, len);
3728                 if (unlikely(!p))
3729                         goto out_overflow;
3730                 if (owner_name != NULL) {
3731                         owner_name->data = kmemdup(p, len, GFP_NOWAIT);
3732                         if (owner_name->data != NULL) {
3733                                 owner_name->len = len;
3734                                 ret = NFS_ATTR_FATTR_OWNER_NAME;
3735                         }
3736                 } else if (len < XDR_MAX_NETOBJ) {
3737                         if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3738                                 ret = NFS_ATTR_FATTR_OWNER;
3739                         else
3740                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3741                                                 __func__);
3742                 } else
3743                         dprintk("%s: name too long (%u)!\n",
3744                                         __func__, len);
3745                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3746         }
3747         dprintk("%s: uid=%d\n", __func__, (int)*uid);
3748         return ret;
3749 out_overflow:
3750         print_overflow_msg(__func__, xdr);
3751         return -EIO;
3752 }
3753
3754 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3755                 const struct nfs_server *server, uint32_t *gid,
3756                 struct nfs4_string *group_name)
3757 {
3758         uint32_t len;
3759         __be32 *p;
3760         int ret = 0;
3761
3762         *gid = -2;
3763         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3764                 return -EIO;
3765         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3766                 p = xdr_inline_decode(xdr, 4);
3767                 if (unlikely(!p))
3768                         goto out_overflow;
3769                 len = be32_to_cpup(p);
3770                 p = xdr_inline_decode(xdr, len);
3771                 if (unlikely(!p))
3772                         goto out_overflow;
3773                 if (group_name != NULL) {
3774                         group_name->data = kmemdup(p, len, GFP_NOWAIT);
3775                         if (group_name->data != NULL) {
3776                                 group_name->len = len;
3777                                 ret = NFS_ATTR_FATTR_GROUP_NAME;
3778                         }
3779                 } else if (len < XDR_MAX_NETOBJ) {
3780                         if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3781                                 ret = NFS_ATTR_FATTR_GROUP;
3782                         else
3783                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3784                                                 __func__);
3785                 } else
3786                         dprintk("%s: name too long (%u)!\n",
3787                                         __func__, len);
3788                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3789         }
3790         dprintk("%s: gid=%d\n", __func__, (int)*gid);
3791         return ret;
3792 out_overflow:
3793         print_overflow_msg(__func__, xdr);
3794         return -EIO;
3795 }
3796
3797 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3798 {
3799         uint32_t major = 0, minor = 0;
3800         __be32 *p;
3801         int ret = 0;
3802
3803         *rdev = MKDEV(0,0);
3804         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3805                 return -EIO;
3806         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3807                 dev_t tmp;
3808
3809                 p = xdr_inline_decode(xdr, 8);
3810                 if (unlikely(!p))
3811                         goto out_overflow;
3812                 major = be32_to_cpup(p++);
3813                 minor = be32_to_cpup(p);
3814                 tmp = MKDEV(major, minor);
3815                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3816                         *rdev = tmp;
3817                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3818                 ret = NFS_ATTR_FATTR_RDEV;
3819         }
3820         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3821         return ret;
3822 out_overflow:
3823         print_overflow_msg(__func__, xdr);
3824         return -EIO;
3825 }
3826
3827 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3828 {
3829         __be32 *p;
3830         int status = 0;
3831
3832         *res = 0;
3833         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3834                 return -EIO;
3835         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3836                 p = xdr_inline_decode(xdr, 8);
3837                 if (unlikely(!p))
3838                         goto out_overflow;
3839                 xdr_decode_hyper(p, res);
3840                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3841         }
3842         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3843         return status;
3844 out_overflow:
3845         print_overflow_msg(__func__, xdr);
3846         return -EIO;
3847 }
3848
3849 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3850 {
3851         __be32 *p;
3852         int status = 0;
3853
3854         *res = 0;
3855         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3856                 return -EIO;
3857         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3858                 p = xdr_inline_decode(xdr, 8);
3859                 if (unlikely(!p))
3860                         goto out_overflow;
3861                 xdr_decode_hyper(p, res);
3862                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3863         }
3864         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3865         return status;
3866 out_overflow:
3867         print_overflow_msg(__func__, xdr);
3868         return -EIO;
3869 }
3870
3871 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3872 {
3873         __be32 *p;
3874         int status = 0;
3875
3876         *res = 0;
3877         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3878                 return -EIO;
3879         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3880                 p = xdr_inline_decode(xdr, 8);
3881                 if (unlikely(!p))
3882                         goto out_overflow;
3883                 xdr_decode_hyper(p, res);
3884                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3885         }
3886         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3887         return status;
3888 out_overflow:
3889         print_overflow_msg(__func__, xdr);
3890         return -EIO;
3891 }
3892
3893 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3894 {
3895         __be32 *p;
3896         int ret = 0;
3897
3898         *used = 0;
3899         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3900                 return -EIO;
3901         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3902                 p = xdr_inline_decode(xdr, 8);
3903                 if (unlikely(!p))
3904                         goto out_overflow;
3905                 xdr_decode_hyper(p, used);
3906                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3907                 ret = NFS_ATTR_FATTR_SPACE_USED;
3908         }
3909         dprintk("%s: space used=%Lu\n", __func__,
3910                         (unsigned long long)*used);
3911         return ret;
3912 out_overflow:
3913         print_overflow_msg(__func__, xdr);
3914         return -EIO;
3915 }
3916
3917 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
3918 {
3919         __be32 *p;
3920         uint64_t sec;
3921         uint32_t nsec;
3922
3923         p = xdr_inline_decode(xdr, 12);
3924         if (unlikely(!p))
3925                 goto out_overflow;
3926         p = xdr_decode_hyper(p, &sec);
3927         nsec = be32_to_cpup(p);
3928         time->tv_sec = (time_t)sec;
3929         time->tv_nsec = (long)nsec;
3930         return 0;
3931 out_overflow:
3932         print_overflow_msg(__func__, xdr);
3933         return -EIO;
3934 }
3935
3936 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3937 {
3938         int status = 0;
3939
3940         time->tv_sec = 0;
3941         time->tv_nsec = 0;
3942         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
3943                 return -EIO;
3944         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
3945                 status = decode_attr_time(xdr, time);
3946                 if (status == 0)
3947                         status = NFS_ATTR_FATTR_ATIME;
3948                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
3949         }
3950         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
3951         return status;
3952 }
3953
3954 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3955 {
3956         int status = 0;
3957
3958         time->tv_sec = 0;
3959         time->tv_nsec = 0;
3960         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
3961                 return -EIO;
3962         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
3963                 status = decode_attr_time(xdr, time);
3964                 if (status == 0)
3965                         status = NFS_ATTR_FATTR_CTIME;
3966                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
3967         }
3968         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
3969         return status;
3970 }
3971
3972 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
3973                                   struct timespec *time)
3974 {
3975         int status = 0;
3976
3977         time->tv_sec = 0;
3978         time->tv_nsec = 0;
3979         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
3980                 return -EIO;
3981         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
3982                 status = decode_attr_time(xdr, time);
3983                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
3984         }
3985         dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
3986                 (long)time->tv_nsec);
3987         return status;
3988 }
3989
3990 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3991 {
3992         int status = 0;
3993
3994         time->tv_sec = 0;
3995         time->tv_nsec = 0;
3996         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
3997                 return -EIO;
3998         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
3999                 status = decode_attr_time(xdr, time);
4000                 if (status == 0)
4001                         status = NFS_ATTR_FATTR_MTIME;
4002                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4003         }
4004         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4005         return status;
4006 }
4007
4008 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
4009 {
4010         unsigned int attrwords = XDR_QUADLEN(attrlen);
4011         unsigned int nwords = xdr->p - savep;
4012
4013         if (unlikely(attrwords != nwords)) {
4014                 dprintk("%s: server returned incorrect attribute length: "
4015                         "%u %c %u\n",
4016                                 __func__,
4017                                 attrwords << 2,
4018                                 (attrwords < nwords) ? '<' : '>',
4019                                 nwords << 2);
4020                 return -EIO;
4021         }
4022         return 0;
4023 }
4024
4025 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4026 {
4027         __be32 *p;
4028
4029         p = xdr_inline_decode(xdr, 20);
4030         if (unlikely(!p))
4031                 goto out_overflow;
4032         cinfo->atomic = be32_to_cpup(p++);
4033         p = xdr_decode_hyper(p, &cinfo->before);
4034         xdr_decode_hyper(p, &cinfo->after);
4035         return 0;
4036 out_overflow:
4037         print_overflow_msg(__func__, xdr);
4038         return -EIO;
4039 }
4040
4041 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
4042 {
4043         __be32 *p;
4044         uint32_t supp, acc;
4045         int status;
4046
4047         status = decode_op_hdr(xdr, OP_ACCESS);
4048         if (status)
4049                 return status;
4050         p = xdr_inline_decode(xdr, 8);
4051         if (unlikely(!p))
4052                 goto out_overflow;
4053         supp = be32_to_cpup(p++);
4054         acc = be32_to_cpup(p);
4055         access->supported = supp;
4056         access->access = acc;
4057         return 0;
4058 out_overflow:
4059         print_overflow_msg(__func__, xdr);
4060         return -EIO;
4061 }
4062
4063 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4064 {
4065         __be32 *p;
4066
4067         p = xdr_inline_decode(xdr, len);
4068         if (likely(p)) {
4069                 memcpy(buf, p, len);
4070                 return 0;
4071         }
4072         print_overflow_msg(__func__, xdr);
4073         return -EIO;
4074 }
4075
4076 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4077 {
4078         return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4079 }
4080
4081 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4082 {
4083         int status;
4084
4085         status = decode_op_hdr(xdr, OP_CLOSE);
4086         if (status != -EIO)
4087                 nfs_increment_open_seqid(status, res->seqid);
4088         if (!status)
4089                 status = decode_stateid(xdr, &res->stateid);
4090         return status;
4091 }
4092
4093 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4094 {
4095         return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4096 }
4097
4098 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
4099 {
4100         int status;
4101
4102         status = decode_op_hdr(xdr, OP_COMMIT);
4103         if (!status)
4104                 status = decode_verifier(xdr, res->verf->verifier);
4105         return status;
4106 }
4107
4108 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4109 {
4110         __be32 *p;
4111         uint32_t bmlen;
4112         int status;
4113
4114         status = decode_op_hdr(xdr, OP_CREATE);
4115         if (status)
4116                 return status;
4117         if ((status = decode_change_info(xdr, cinfo)))
4118                 return status;
4119         p = xdr_inline_decode(xdr, 4);
4120         if (unlikely(!p))
4121                 goto out_overflow;
4122         bmlen = be32_to_cpup(p);
4123         p = xdr_inline_decode(xdr, bmlen << 2);
4124         if (likely(p))
4125                 return 0;
4126 out_overflow:
4127         print_overflow_msg(__func__, xdr);
4128         return -EIO;
4129 }
4130
4131 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4132 {
4133         __be32 *savep;
4134         uint32_t attrlen, bitmap[3] = {0};
4135         int status;
4136
4137         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4138                 goto xdr_error;
4139         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4140                 goto xdr_error;
4141         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4142                 goto xdr_error;
4143         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4144                 goto xdr_error;
4145         if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4146                                                  &res->fh_expire_type)) != 0)
4147                 goto xdr_error;
4148         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4149                 goto xdr_error;
4150         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4151                 goto xdr_error;
4152         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4153                 goto xdr_error;
4154         status = verify_attr_len(xdr, savep, attrlen);
4155 xdr_error:
4156         dprintk("%s: xdr returned %d!\n", __func__, -status);
4157         return status;
4158 }
4159
4160 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4161 {
4162         __be32 *savep;
4163         uint32_t attrlen, bitmap[3] = {0};
4164         int status;
4165
4166         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4167                 goto xdr_error;
4168         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4169                 goto xdr_error;
4170         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4171                 goto xdr_error;
4172
4173         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4174                 goto xdr_error;
4175         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4176                 goto xdr_error;
4177         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4178                 goto xdr_error;
4179         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4180                 goto xdr_error;
4181         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4182                 goto xdr_error;
4183         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4184                 goto xdr_error;
4185
4186         status = verify_attr_len(xdr, savep, attrlen);
4187 xdr_error:
4188         dprintk("%s: xdr returned %d!\n", __func__, -status);
4189         return status;
4190 }
4191
4192 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4193 {
4194         __be32 *savep;
4195         uint32_t attrlen, bitmap[3] = {0};
4196         int status;
4197
4198         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4199                 goto xdr_error;
4200         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4201                 goto xdr_error;
4202         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4203                 goto xdr_error;
4204
4205         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4206                 goto xdr_error;
4207         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4208                 goto xdr_error;
4209
4210         status = verify_attr_len(xdr, savep, attrlen);
4211 xdr_error:
4212         dprintk("%s: xdr returned %d!\n", __func__, -status);
4213         return status;
4214 }
4215
4216 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4217                 struct nfs_fattr *fattr, struct nfs_fh *fh,
4218                 struct nfs4_fs_locations *fs_loc,
4219                 const struct nfs_server *server)
4220 {
4221         int status;
4222         umode_t fmode = 0;
4223         uint32_t type;
4224         int32_t err;
4225
4226         status = decode_attr_type(xdr, bitmap, &type);
4227         if (status < 0)
4228                 goto xdr_error;
4229         fattr->mode = 0;
4230         if (status != 0) {
4231                 fattr->mode |= nfs_type2fmt[type];
4232                 fattr->valid |= status;
4233         }
4234
4235         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4236         if (status < 0)
4237                 goto xdr_error;
4238         fattr->valid |= status;
4239
4240         status = decode_attr_size(xdr, bitmap, &fattr->size);
4241         if (status < 0)
4242                 goto xdr_error;
4243         fattr->valid |= status;
4244
4245         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4246         if (status < 0)
4247                 goto xdr_error;
4248         fattr->valid |= status;
4249
4250         err = 0;
4251         status = decode_attr_error(xdr, bitmap, &err);
4252         if (status < 0)
4253                 goto xdr_error;
4254         if (err == -NFS4ERR_WRONGSEC)
4255                 nfs_fixup_secinfo_attributes(fattr, fh);
4256
4257         status = decode_attr_filehandle(xdr, bitmap, fh);
4258         if (status < 0)
4259                 goto xdr_error;
4260
4261         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4262         if (status < 0)
4263                 goto xdr_error;
4264         fattr->valid |= status;
4265
4266         status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4267         if (status < 0)
4268                 goto xdr_error;
4269         fattr->valid |= status;
4270
4271         status = decode_attr_mode(xdr, bitmap, &fmode);
4272         if (status < 0)
4273                 goto xdr_error;
4274         if (status != 0) {
4275                 fattr->mode |= fmode;
4276                 fattr->valid |= status;
4277         }
4278
4279         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4280         if (status < 0)
4281                 goto xdr_error;
4282         fattr->valid |= status;
4283
4284         status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4285         if (status < 0)
4286                 goto xdr_error;
4287         fattr->valid |= status;
4288
4289         status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4290         if (status < 0)
4291                 goto xdr_error;
4292         fattr->valid |= status;
4293
4294         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4295         if (status < 0)
4296                 goto xdr_error;
4297         fattr->valid |= status;
4298
4299         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4300         if (status < 0)
4301                 goto xdr_error;
4302         fattr->valid |= status;
4303
4304         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4305         if (status < 0)
4306                 goto xdr_error;
4307         fattr->valid |= status;
4308
4309         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4310         if (status < 0)
4311                 goto xdr_error;
4312         fattr->valid |= status;
4313
4314         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4315         if (status < 0)
4316                 goto xdr_error;
4317         fattr->valid |= status;
4318
4319         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4320         if (status < 0)
4321                 goto xdr_error;
4322         fattr->valid |= status;
4323
4324 xdr_error:
4325         dprintk("%s: xdr returned %d\n", __func__, -status);
4326         return status;
4327 }
4328
4329 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4330                 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4331                 const struct nfs_server *server)
4332 {
4333         __be32 *savep;
4334         uint32_t attrlen,
4335                  bitmap[3] = {0};
4336         int status;
4337
4338         status = decode_op_hdr(xdr, OP_GETATTR);
4339         if (status < 0)
4340                 goto xdr_error;
4341
4342         status = decode_attr_bitmap(xdr, bitmap);
4343         if (status < 0)
4344                 goto xdr_error;
4345
4346         status = decode_attr_length(xdr, &attrlen, &savep);
4347         if (status < 0)
4348                 goto xdr_error;
4349
4350         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc, server);
4351         if (status < 0)
4352                 goto xdr_error;
4353
4354         status = verify_attr_len(xdr, savep, attrlen);
4355 xdr_error:
4356         dprintk("%s: xdr returned %d\n", __func__, -status);
4357         return status;
4358 }
4359
4360 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4361                 const struct nfs_server *server)
4362 {
4363         return decode_getfattr_generic(xdr, fattr, NULL, NULL, server);
4364 }
4365
4366 /*
4367  * Decode potentially multiple layout types. Currently we only support
4368  * one layout driver per file system.
4369  */
4370 static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4371                                          uint32_t *layouttype)
4372 {
4373         uint32_t *p;
4374         int num;
4375
4376         p = xdr_inline_decode(xdr, 4);
4377         if (unlikely(!p))
4378                 goto out_overflow;
4379         num = be32_to_cpup(p);
4380
4381         /* pNFS is not supported by the underlying file system */
4382         if (num == 0) {
4383                 *layouttype = 0;
4384                 return 0;
4385         }
4386         if (num > 1)
4387                 printk(KERN_INFO "NFS: %s: Warning: Multiple pNFS layout "
4388                         "drivers per filesystem not supported\n", __func__);
4389
4390         /* Decode and set first layout type, move xdr->p past unused types */
4391         p = xdr_inline_decode(xdr, num * 4);
4392         if (unlikely(!p))
4393                 goto out_overflow;
4394         *layouttype = be32_to_cpup(p);
4395         return 0;
4396 out_overflow:
4397         print_overflow_msg(__func__, xdr);
4398         return -EIO;
4399 }
4400
4401 /*
4402  * The type of file system exported.
4403  * Note we must ensure that layouttype is set in any non-error case.
4404  */
4405 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4406                                 uint32_t *layouttype)
4407 {
4408         int status = 0;
4409
4410         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4411         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4412                 return -EIO;
4413         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4414                 status = decode_first_pnfs_layout_type(xdr, layouttype);
4415                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4416         } else
4417                 *layouttype = 0;
4418         return status;
4419 }
4420
4421 /*
4422  * The prefered block size for layout directed io
4423  */
4424 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4425                                       uint32_t *res)
4426 {
4427         __be32 *p;
4428
4429         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4430         *res = 0;
4431         if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4432                 p = xdr_inline_decode(xdr, 4);
4433                 if (unlikely(!p)) {
4434                         print_overflow_msg(__func__, xdr);
4435                         return -EIO;
4436                 }
4437                 *res = be32_to_cpup(p);
4438                 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4439         }
4440         return 0;
4441 }
4442
4443 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4444 {
4445         __be32 *savep;
4446         uint32_t attrlen, bitmap[3];
4447         int status;
4448
4449         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4450                 goto xdr_error;
4451         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4452                 goto xdr_error;
4453         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4454                 goto xdr_error;
4455
4456         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4457
4458         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4459                 goto xdr_error;
4460         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4461                 goto xdr_error;
4462         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4463                 goto xdr_error;
4464         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4465         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4466                 goto xdr_error;
4467         fsinfo->wtpref = fsinfo->wtmax;
4468         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4469         if (status != 0)
4470                 goto xdr_error;
4471         status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4472         if (status != 0)
4473                 goto xdr_error;
4474         status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4475         if (status)
4476                 goto xdr_error;
4477
4478         status = verify_attr_len(xdr, savep, attrlen);
4479 xdr_error:
4480         dprintk("%s: xdr returned %d!\n", __func__, -status);
4481         return status;
4482 }
4483
4484 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4485 {
4486         __be32 *p;
4487         uint32_t len;
4488         int status;
4489
4490         /* Zero handle first to allow comparisons */
4491         memset(fh, 0, sizeof(*fh));
4492
4493         status = decode_op_hdr(xdr, OP_GETFH);
4494         if (status)
4495                 return status;
4496
4497         p = xdr_inline_decode(xdr, 4);
4498         if (unlikely(!p))
4499                 goto out_overflow;
4500         len = be32_to_cpup(p);
4501         if (len > NFS4_FHSIZE)
4502                 return -EIO;
4503         fh->size = len;
4504         p = xdr_inline_decode(xdr, len);
4505         if (unlikely(!p))
4506                 goto out_overflow;
4507         memcpy(fh->data, p, len);
4508         return 0;
4509 out_overflow:
4510         print_overflow_msg(__func__, xdr);
4511         return -EIO;
4512 }
4513
4514 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4515 {
4516         int status;
4517
4518         status = decode_op_hdr(xdr, OP_LINK);
4519         if (status)
4520                 return status;
4521         return decode_change_info(xdr, cinfo);
4522 }
4523
4524 /*
4525  * We create the owner, so we know a proper owner.id length is 4.
4526  */
4527 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4528 {
4529         uint64_t offset, length, clientid;
4530         __be32 *p;
4531         uint32_t namelen, type;
4532
4533         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4534         if (unlikely(!p))
4535                 goto out_overflow;
4536         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4537         p = xdr_decode_hyper(p, &length);
4538         type = be32_to_cpup(p++); /* 4 byte read */
4539         if (fl != NULL) { /* manipulate file lock */
4540                 fl->fl_start = (loff_t)offset;
4541                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4542                 if (length == ~(uint64_t)0)
4543                         fl->fl_end = OFFSET_MAX;
4544                 fl->fl_type = F_WRLCK;
4545                 if (type & 1)
4546                         fl->fl_type = F_RDLCK;
4547                 fl->fl_pid = 0;
4548         }
4549         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4550         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4551         p = xdr_inline_decode(xdr, namelen); /* variable size field */
4552         if (likely(p))
4553                 return -NFS4ERR_DENIED;
4554 out_overflow:
4555         print_overflow_msg(__func__, xdr);
4556         return -EIO;
4557 }
4558
4559 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4560 {
4561         int status;
4562
4563         status = decode_op_hdr(xdr, OP_LOCK);
4564         if (status == -EIO)
4565                 goto out;
4566         if (status == 0) {
4567                 status = decode_stateid(xdr, &res->stateid);
4568                 if (unlikely(status))
4569                         goto out;
4570         } else if (status == -NFS4ERR_DENIED)
4571                 status = decode_lock_denied(xdr, NULL);
4572         if (res->open_seqid != NULL)
4573                 nfs_increment_open_seqid(status, res->open_seqid);
4574         nfs_increment_lock_seqid(status, res->lock_seqid);
4575 out:
4576         return status;
4577 }
4578
4579 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4580 {
4581         int status;
4582         status = decode_op_hdr(xdr, OP_LOCKT);
4583         if (status == -NFS4ERR_DENIED)
4584                 return decode_lock_denied(xdr, res->denied);
4585         return status;
4586 }
4587
4588 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4589 {
4590         int status;
4591
4592         status = decode_op_hdr(xdr, OP_LOCKU);
4593         if (status != -EIO)
4594                 nfs_increment_lock_seqid(status, res->seqid);
4595         if (status == 0)
4596                 status = decode_stateid(xdr, &res->stateid);
4597         return status;
4598 }
4599
4600 static int decode_release_lockowner(struct xdr_stream *xdr)
4601 {
4602         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4603 }
4604
4605 static int decode_lookup(struct xdr_stream *xdr)
4606 {
4607         return decode_op_hdr(xdr, OP_LOOKUP);
4608 }
4609
4610 /* This is too sick! */
4611 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4612 {
4613         __be32 *p;
4614         uint32_t limit_type, nblocks, blocksize;
4615
4616         p = xdr_inline_decode(xdr, 12);
4617         if (unlikely(!p))
4618                 goto out_overflow;
4619         limit_type = be32_to_cpup(p++);
4620         switch (limit_type) {
4621         case 1:
4622                 xdr_decode_hyper(p, maxsize);
4623                 break;
4624         case 2:
4625                 nblocks = be32_to_cpup(p++);
4626                 blocksize = be32_to_cpup(p);
4627                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4628         }
4629         return 0;
4630 out_overflow:
4631         print_overflow_msg(__func__, xdr);
4632         return -EIO;
4633 }
4634
4635 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4636 {
4637         __be32 *p;
4638         uint32_t delegation_type;
4639         int status;
4640
4641         p = xdr_inline_decode(xdr, 4);
4642         if (unlikely(!p))
4643                 goto out_overflow;
4644         delegation_type = be32_to_cpup(p);
4645         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4646                 res->delegation_type = 0;
4647                 return 0;
4648         }
4649         status = decode_stateid(xdr, &res->delegation);
4650         if (unlikely(status))
4651                 return status;
4652         p = xdr_inline_decode(xdr, 4);
4653         if (unlikely(!p))
4654                 goto out_overflow;
4655         res->do_recall = be32_to_cpup(p);
4656
4657         switch (delegation_type) {
4658         case NFS4_OPEN_DELEGATE_READ:
4659                 res->delegation_type = FMODE_READ;
4660                 break;
4661         case NFS4_OPEN_DELEGATE_WRITE:
4662                 res->delegation_type = FMODE_WRITE|FMODE_READ;
4663                 if (decode_space_limit(xdr, &res->maxsize) < 0)
4664                                 return -EIO;
4665         }
4666         return decode_ace(xdr, NULL, res->server->nfs_client);
4667 out_overflow:
4668         print_overflow_msg(__func__, xdr);
4669         return -EIO;
4670 }
4671
4672 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
4673 {
4674         __be32 *p;
4675         uint32_t savewords, bmlen, i;
4676         int status;
4677
4678         status = decode_op_hdr(xdr, OP_OPEN);
4679         if (status != -EIO)
4680                 nfs_increment_open_seqid(status, res->seqid);
4681         if (!status)
4682                 status = decode_stateid(xdr, &res->stateid);
4683         if (unlikely(status))
4684                 return status;
4685
4686         decode_change_info(xdr, &res->cinfo);
4687
4688         p = xdr_inline_decode(xdr, 8);
4689         if (unlikely(!p))
4690                 goto out_overflow;
4691         res->rflags = be32_to_cpup(p++);
4692         bmlen = be32_to_cpup(p);
4693         if (bmlen > 10)
4694                 goto xdr_error;
4695
4696         p = xdr_inline_decode(xdr, bmlen << 2);
4697         if (unlikely(!p))
4698                 goto out_overflow;
4699         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
4700         for (i = 0; i < savewords; ++i)
4701                 res->attrset[i] = be32_to_cpup(p++);
4702         for (; i < NFS4_BITMAP_SIZE; i++)
4703                 res->attrset[i] = 0;
4704
4705         return decode_delegation(xdr, res);
4706 xdr_error:
4707         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
4708         return -EIO;
4709 out_overflow:
4710         print_overflow_msg(__func__, xdr);
4711         return -EIO;
4712 }
4713
4714 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
4715 {
4716         int status;
4717
4718         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
4719         if (status != -EIO)
4720                 nfs_increment_open_seqid(status, res->seqid);
4721         if (!status)
4722                 status = decode_stateid(xdr, &res->stateid);
4723         return status;
4724 }
4725
4726 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
4727 {
4728         int status;
4729
4730         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
4731         if (status != -EIO)
4732                 nfs_increment_open_seqid(status, res->seqid);
4733         if (!status)
4734                 status = decode_stateid(xdr, &res->stateid);
4735         return status;
4736 }
4737
4738 static int decode_putfh(struct xdr_stream *xdr)
4739 {
4740         return decode_op_hdr(xdr, OP_PUTFH);
4741 }
4742
4743 static int decode_putrootfh(struct xdr_stream *xdr)
4744 {
4745         return decode_op_hdr(xdr, OP_PUTROOTFH);
4746 }
4747
4748 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
4749 {
4750         struct kvec *iov = req->rq_rcv_buf.head;
4751         __be32 *p;
4752         uint32_t count, eof, recvd, hdrlen;
4753         int status;
4754
4755         status = decode_op_hdr(xdr, OP_READ);
4756         if (status)
4757                 return status;
4758         p = xdr_inline_decode(xdr, 8);
4759         if (unlikely(!p))
4760                 goto out_overflow;
4761         eof = be32_to_cpup(p++);
4762         count = be32_to_cpup(p);
4763         hdrlen = (u8 *) xdr->p - (u8 *) iov->iov_base;
4764         recvd = req->rq_rcv_buf.len - hdrlen;
4765         if (count > recvd) {
4766                 dprintk("NFS: server cheating in read reply: "
4767                                 "count %u > recvd %u\n", count, recvd);
4768                 count = recvd;
4769                 eof = 0;
4770         }
4771         xdr_read_pages(xdr, count);
4772         res->eof = eof;
4773         res->count = count;
4774         return 0;
4775 out_overflow:
4776         print_overflow_msg(__func__, xdr);
4777         return -EIO;
4778 }
4779
4780 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
4781 {
4782         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
4783         struct kvec     *iov = rcvbuf->head;
4784         size_t          hdrlen;
4785         u32             recvd, pglen = rcvbuf->page_len;
4786         int             status;
4787         __be32          verf[2];
4788
4789         status = decode_op_hdr(xdr, OP_READDIR);
4790         if (!status)
4791                 status = decode_verifier(xdr, readdir->verifier.data);
4792         if (unlikely(status))
4793                 return status;
4794         memcpy(verf, readdir->verifier.data, sizeof(verf));
4795         dprintk("%s: verifier = %08x:%08x\n",
4796                         __func__, verf[0], verf[1]);
4797
4798         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4799         recvd = rcvbuf->len - hdrlen;
4800         if (pglen > recvd)
4801                 pglen = recvd;
4802         xdr_read_pages(xdr, pglen);
4803
4804
4805         return pglen;
4806 }
4807
4808 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
4809 {
4810         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4811         struct kvec *iov = rcvbuf->head;
4812         size_t hdrlen;
4813         u32 len, recvd;
4814         __be32 *p;
4815         int status;
4816
4817         status = decode_op_hdr(xdr, OP_READLINK);
4818         if (status)
4819                 return status;
4820
4821         /* Convert length of symlink */
4822         p = xdr_inline_decode(xdr, 4);
4823         if (unlikely(!p))
4824                 goto out_overflow;
4825         len = be32_to_cpup(p);
4826         if (len >= rcvbuf->page_len || len <= 0) {
4827                 dprintk("nfs: server returned giant symlink!\n");
4828                 return -ENAMETOOLONG;
4829         }
4830         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4831         recvd = req->rq_rcv_buf.len - hdrlen;
4832         if (recvd < len) {
4833                 dprintk("NFS: server cheating in readlink reply: "
4834                                 "count %u > recvd %u\n", len, recvd);
4835                 return -EIO;
4836         }
4837         xdr_read_pages(xdr, len);
4838         /*
4839          * The XDR encode routine has set things up so that
4840          * the link text will be copied directly into the
4841          * buffer.  We just have to do overflow-checking,
4842          * and and null-terminate the text (the VFS expects
4843          * null-termination).
4844          */
4845         xdr_terminate_string(rcvbuf, len);
4846         return 0;
4847 out_overflow:
4848         print_overflow_msg(__func__, xdr);
4849         return -EIO;
4850 }
4851
4852 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4853 {
4854         int status;
4855
4856         status = decode_op_hdr(xdr, OP_REMOVE);
4857         if (status)
4858                 goto out;
4859         status = decode_change_info(xdr, cinfo);
4860 out:
4861         return status;
4862 }
4863
4864 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
4865               struct nfs4_change_info *new_cinfo)
4866 {
4867         int status;
4868
4869         status = decode_op_hdr(xdr, OP_RENAME);
4870         if (status)
4871                 goto out;
4872         if ((status = decode_change_info(xdr, old_cinfo)))
4873                 goto out;
4874         status = decode_change_info(xdr, new_cinfo);
4875 out:
4876         return status;
4877 }
4878
4879 static int decode_renew(struct xdr_stream *xdr)
4880 {
4881         return decode_op_hdr(xdr, OP_RENEW);
4882 }
4883
4884 static int
4885 decode_restorefh(struct xdr_stream *xdr)
4886 {
4887         return decode_op_hdr(xdr, OP_RESTOREFH);
4888 }
4889
4890 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
4891                          struct nfs_getaclres *res)
4892 {
4893         __be32 *savep, *bm_p;
4894         uint32_t attrlen,
4895                  bitmap[3] = {0};
4896         struct kvec *iov = req->rq_rcv_buf.head;
4897         int status;
4898
4899         res->acl_len = 0;
4900         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4901                 goto out;
4902         bm_p = xdr->p;
4903         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4904                 goto out;
4905         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4906                 goto out;
4907
4908         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
4909                 return -EIO;
4910         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
4911                 size_t hdrlen;
4912                 u32 recvd;
4913
4914                 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
4915                  * are stored with the acl data to handle the problem of
4916                  * variable length bitmaps.*/
4917                 xdr->p = bm_p;
4918                 res->acl_data_offset = be32_to_cpup(bm_p) + 2;
4919                 res->acl_data_offset <<= 2;
4920
4921                 /* We ignore &savep and don't do consistency checks on
4922                  * the attr length.  Let userspace figure it out.... */
4923                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
4924                 attrlen += res->acl_data_offset;
4925                 recvd = req->rq_rcv_buf.len - hdrlen;
4926                 if (attrlen > recvd) {
4927                         if (res->acl_flags & NFS4_ACL_LEN_REQUEST) {
4928                                 /* getxattr interface called with a NULL buf */
4929                                 res->acl_len = attrlen;
4930                                 goto out;
4931                         }
4932                         dprintk("NFS: acl reply: attrlen %u > recvd %u\n",
4933                                         attrlen, recvd);
4934                         return -EINVAL;
4935                 }
4936                 xdr_read_pages(xdr, attrlen);
4937                 res->acl_len = attrlen;
4938         } else
4939                 status = -EOPNOTSUPP;
4940
4941 out:
4942         return status;
4943 }
4944
4945 static int
4946 decode_savefh(struct xdr_stream *xdr)
4947 {
4948         return decode_op_hdr(xdr, OP_SAVEFH);
4949 }
4950
4951 static int decode_setattr(struct xdr_stream *xdr)
4952 {
4953         __be32 *p;
4954         uint32_t bmlen;
4955         int status;
4956
4957         status = decode_op_hdr(xdr, OP_SETATTR);
4958         if (status)
4959                 return status;
4960         p = xdr_inline_decode(xdr, 4);
4961         if (unlikely(!p))
4962                 goto out_overflow;
4963         bmlen = be32_to_cpup(p);
4964         p = xdr_inline_decode(xdr, bmlen << 2);
4965         if (likely(p))
4966                 return 0;
4967 out_overflow:
4968         print_overflow_msg(__func__, xdr);
4969         return -EIO;
4970 }
4971
4972 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
4973 {
4974         __be32 *p;
4975         uint32_t opnum;
4976         int32_t nfserr;
4977
4978         p = xdr_inline_decode(xdr, 8);
4979         if (unlikely(!p))
4980                 goto out_overflow;
4981         opnum = be32_to_cpup(p++);
4982         if (opnum != OP_SETCLIENTID) {
4983                 dprintk("nfs: decode_setclientid: Server returned operation"
4984                         " %d\n", opnum);
4985                 return -EIO;
4986         }
4987         nfserr = be32_to_cpup(p);
4988         if (nfserr == NFS_OK) {
4989                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
4990                 if (unlikely(!p))
4991                         goto out_overflow;
4992                 p = xdr_decode_hyper(p, &res->clientid);
4993                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
4994         } else if (nfserr == NFSERR_CLID_INUSE) {
4995                 uint32_t len;
4996
4997                 /* skip netid string */
4998                 p = xdr_inline_decode(xdr, 4);
4999                 if (unlikely(!p))
5000                         goto out_overflow;
5001                 len = be32_to_cpup(p);
5002                 p = xdr_inline_decode(xdr, len);
5003                 if (unlikely(!p))
5004                         goto out_overflow;
5005
5006                 /* skip uaddr string */
5007                 p = xdr_inline_decode(xdr, 4);
5008                 if (unlikely(!p))
5009                         goto out_overflow;
5010                 len = be32_to_cpup(p);
5011                 p = xdr_inline_decode(xdr, len);
5012                 if (unlikely(!p))
5013                         goto out_overflow;
5014                 return -NFSERR_CLID_INUSE;
5015         } else
5016                 return nfs4_stat_to_errno(nfserr);
5017
5018         return 0;
5019 out_overflow:
5020         print_overflow_msg(__func__, xdr);
5021         return -EIO;
5022 }
5023
5024 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5025 {
5026         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5027 }
5028
5029 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
5030 {
5031         __be32 *p;
5032         int status;
5033
5034         status = decode_op_hdr(xdr, OP_WRITE);
5035         if (status)
5036                 return status;
5037
5038         p = xdr_inline_decode(xdr, 16);
5039         if (unlikely(!p))
5040                 goto out_overflow;
5041         res->count = be32_to_cpup(p++);
5042         res->verf->committed = be32_to_cpup(p++);
5043         memcpy(res->verf->verifier, p, NFS4_VERIFIER_SIZE);
5044         return 0;
5045 out_overflow:
5046         print_overflow_msg(__func__, xdr);
5047         return -EIO;
5048 }
5049
5050 static int decode_delegreturn(struct xdr_stream *xdr)
5051 {
5052         return decode_op_hdr(xdr, OP_DELEGRETURN);
5053 }
5054
5055 static int decode_secinfo_gss(struct xdr_stream *xdr, struct nfs4_secinfo_flavor *flavor)
5056 {
5057         __be32 *p;
5058
5059         p = xdr_inline_decode(xdr, 4);
5060         if (unlikely(!p))
5061                 goto out_overflow;
5062         flavor->gss.sec_oid4.len = be32_to_cpup(p);
5063         if (flavor->gss.sec_oid4.len > GSS_OID_MAX_LEN)
5064                 goto out_err;
5065
5066         p = xdr_inline_decode(xdr, flavor->gss.sec_oid4.len);
5067         if (unlikely(!p))
5068                 goto out_overflow;
5069         memcpy(flavor->gss.sec_oid4.data, p, flavor->gss.sec_oid4.len);
5070
5071         p = xdr_inline_decode(xdr, 8);
5072         if (unlikely(!p))
5073                 goto out_overflow;
5074         flavor->gss.qop4 = be32_to_cpup(p++);
5075         flavor->gss.service = be32_to_cpup(p);
5076
5077         return 0;
5078
5079 out_overflow:
5080         print_overflow_msg(__func__, xdr);
5081         return -EIO;
5082 out_err:
5083         return -EINVAL;
5084 }
5085
5086 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5087 {
5088         struct nfs4_secinfo_flavor *sec_flavor;
5089         int status;
5090         __be32 *p;
5091         int i, num_flavors;
5092
5093         status = decode_op_hdr(xdr, OP_SECINFO);
5094         if (status)
5095                 goto out;
5096         p = xdr_inline_decode(xdr, 4);
5097         if (unlikely(!p))
5098                 goto out_overflow;
5099
5100         res->flavors->num_flavors = 0;
5101         num_flavors = be32_to_cpup(p);
5102
5103         for (i = 0; i < num_flavors; i++) {
5104                 sec_flavor = &res->flavors->flavors[i];
5105                 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5106                         break;
5107
5108                 p = xdr_inline_decode(xdr, 4);
5109                 if (unlikely(!p))
5110                         goto out_overflow;
5111                 sec_flavor->flavor = be32_to_cpup(p);
5112
5113                 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5114                         status = decode_secinfo_gss(xdr, sec_flavor);
5115                         if (status)
5116                                 goto out;
5117                 }
5118                 res->flavors->num_flavors++;
5119         }
5120
5121 out:
5122         return status;
5123 out_overflow:
5124         print_overflow_msg(__func__, xdr);
5125         return -EIO;
5126 }
5127
5128 #if defined(CONFIG_NFS_V4_1)
5129 static int decode_exchange_id(struct xdr_stream *xdr,
5130                               struct nfs41_exchange_id_res *res)
5131 {
5132         __be32 *p;
5133         uint32_t dummy;
5134         char *dummy_str;
5135         int status;
5136         struct nfs_client *clp = res->client;
5137         uint32_t impl_id_count;
5138
5139         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5140         if (status)
5141                 return status;
5142
5143         p = xdr_inline_decode(xdr, 8);
5144         if (unlikely(!p))
5145                 goto out_overflow;
5146         xdr_decode_hyper(p, &clp->cl_clientid);
5147         p = xdr_inline_decode(xdr, 12);
5148         if (unlikely(!p))
5149                 goto out_overflow;
5150         clp->cl_seqid = be32_to_cpup(p++);
5151         clp->cl_exchange_flags = be32_to_cpup(p++);
5152
5153         /* We ask for SP4_NONE */
5154         dummy = be32_to_cpup(p);
5155         if (dummy != SP4_NONE)
5156                 return -EIO;
5157
5158         /* Throw away minor_id */
5159         p = xdr_inline_decode(xdr, 8);
5160         if (unlikely(!p))
5161                 goto out_overflow;
5162
5163         /* Throw away Major id */
5164         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5165         if (unlikely(status))
5166                 return status;
5167
5168         /* Save server_scope */
5169         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5170         if (unlikely(status))
5171                 return status;
5172
5173         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5174                 return -EIO;
5175
5176         memcpy(res->server_scope->server_scope, dummy_str, dummy);
5177         res->server_scope->server_scope_sz = dummy;
5178
5179         /* Implementation Id */
5180         p = xdr_inline_decode(xdr, 4);
5181         if (unlikely(!p))
5182                 goto out_overflow;
5183         impl_id_count = be32_to_cpup(p++);
5184
5185         if (impl_id_count) {
5186                 /* nii_domain */
5187                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5188                 if (unlikely(status))
5189                         return status;
5190                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5191                         return -EIO;
5192                 memcpy(res->impl_id->domain, dummy_str, dummy);
5193
5194                 /* nii_name */
5195                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5196                 if (unlikely(status))
5197                         return status;
5198                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5199                         return -EIO;
5200                 memcpy(res->impl_id->name, dummy_str, dummy);
5201
5202                 /* nii_date */
5203                 p = xdr_inline_decode(xdr, 12);
5204                 if (unlikely(!p))
5205                         goto out_overflow;
5206                 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5207                 res->impl_id->date.nseconds = be32_to_cpup(p);
5208
5209                 /* if there's more than one entry, ignore the rest */
5210         }
5211         return 0;
5212 out_overflow:
5213         print_overflow_msg(__func__, xdr);
5214         return -EIO;
5215 }
5216
5217 static int decode_chan_attrs(struct xdr_stream *xdr,
5218                              struct nfs4_channel_attrs *attrs)
5219 {
5220         __be32 *p;
5221         u32 nr_attrs, val;
5222
5223         p = xdr_inline_decode(xdr, 28);
5224         if (unlikely(!p))
5225                 goto out_overflow;
5226         val = be32_to_cpup(p++);        /* headerpadsz */
5227         if (val)
5228                 return -EINVAL;         /* no support for header padding yet */
5229         attrs->max_rqst_sz = be32_to_cpup(p++);
5230         attrs->max_resp_sz = be32_to_cpup(p++);
5231         attrs->max_resp_sz_cached = be32_to_cpup(p++);
5232         attrs->max_ops = be32_to_cpup(p++);
5233         attrs->max_reqs = be32_to_cpup(p++);
5234         nr_attrs = be32_to_cpup(p);
5235         if (unlikely(nr_attrs > 1)) {
5236                 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5237                         "count %u\n", __func__, nr_attrs);
5238                 return -EINVAL;
5239         }
5240         if (nr_attrs == 1) {
5241                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5242                 if (unlikely(!p))
5243                         goto out_overflow;
5244         }
5245         return 0;
5246 out_overflow:
5247         print_overflow_msg(__func__, xdr);
5248         return -EIO;
5249 }
5250
5251 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5252 {
5253         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5254 }
5255
5256 static int decode_create_session(struct xdr_stream *xdr,
5257                                  struct nfs41_create_session_res *res)
5258 {
5259         __be32 *p;
5260         int status;
5261         struct nfs_client *clp = res->client;
5262         struct nfs4_session *session = clp->cl_session;
5263
5264         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5265         if (!status)
5266                 status = decode_sessionid(xdr, &session->sess_id);
5267         if (unlikely(status))
5268                 return status;
5269
5270         /* seqid, flags */
5271         p = xdr_inline_decode(xdr, 8);
5272         if (unlikely(!p))
5273                 goto out_overflow;
5274         clp->cl_seqid = be32_to_cpup(p++);
5275         session->flags = be32_to_cpup(p);
5276
5277         /* Channel attributes */
5278         status = decode_chan_attrs(xdr, &session->fc_attrs);
5279         if (!status)
5280                 status = decode_chan_attrs(xdr, &session->bc_attrs);
5281         return status;
5282 out_overflow:
5283         print_overflow_msg(__func__, xdr);
5284         return -EIO;
5285 }
5286
5287 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5288 {
5289         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5290 }
5291
5292 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5293 {
5294         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5295 }
5296 #endif /* CONFIG_NFS_V4_1 */
5297
5298 static int decode_sequence(struct xdr_stream *xdr,
5299                            struct nfs4_sequence_res *res,
5300                            struct rpc_rqst *rqstp)
5301 {
5302 #if defined(CONFIG_NFS_V4_1)
5303         struct nfs4_sessionid id;
5304         u32 dummy;
5305         int status;
5306         __be32 *p;
5307
5308         if (!res->sr_session)
5309                 return 0;
5310
5311         status = decode_op_hdr(xdr, OP_SEQUENCE);
5312         if (!status)
5313                 status = decode_sessionid(xdr, &id);
5314         if (unlikely(status))
5315                 goto out_err;
5316
5317         /*
5318          * If the server returns different values for sessionID, slotID or
5319          * sequence number, the server is looney tunes.
5320          */
5321         status = -EREMOTEIO;
5322
5323         if (memcmp(id.data, res->sr_session->sess_id.data,
5324                    NFS4_MAX_SESSIONID_LEN)) {
5325                 dprintk("%s Invalid session id\n", __func__);
5326                 goto out_err;
5327         }
5328
5329         p = xdr_inline_decode(xdr, 20);
5330         if (unlikely(!p))
5331                 goto out_overflow;
5332
5333         /* seqid */
5334         dummy = be32_to_cpup(p++);
5335         if (dummy != res->sr_slot->seq_nr) {
5336                 dprintk("%s Invalid sequence number\n", __func__);
5337                 goto out_err;
5338         }
5339         /* slot id */
5340         dummy = be32_to_cpup(p++);
5341         if (dummy != res->sr_slot - res->sr_session->fc_slot_table.slots) {
5342                 dprintk("%s Invalid slot id\n", __func__);
5343                 goto out_err;
5344         }
5345         /* highest slot id - currently not processed */
5346         dummy = be32_to_cpup(p++);
5347         /* target highest slot id - currently not processed */
5348         dummy = be32_to_cpup(p++);
5349         /* result flags */
5350         res->sr_status_flags = be32_to_cpup(p);
5351         status = 0;
5352 out_err:
5353         res->sr_status = status;
5354         return status;
5355 out_overflow:
5356         print_overflow_msg(__func__, xdr);
5357         status = -EIO;
5358         goto out_err;
5359 #else  /* CONFIG_NFS_V4_1 */
5360         return 0;
5361 #endif /* CONFIG_NFS_V4_1 */
5362 }
5363
5364 #if defined(CONFIG_NFS_V4_1)
5365 /*
5366  * TODO: Need to handle case when EOF != true;
5367  */
5368 static int decode_getdevicelist(struct xdr_stream *xdr,
5369                                 struct pnfs_devicelist *res)
5370 {
5371         __be32 *p;
5372         int status, i;
5373         struct nfs_writeverf verftemp;
5374
5375         status = decode_op_hdr(xdr, OP_GETDEVICELIST);
5376         if (status)
5377                 return status;
5378
5379         p = xdr_inline_decode(xdr, 8 + 8 + 4);
5380         if (unlikely(!p))
5381                 goto out_overflow;
5382
5383         /* TODO: Skip cookie for now */
5384         p += 2;
5385
5386         /* Read verifier */
5387         p = xdr_decode_opaque_fixed(p, verftemp.verifier, NFS4_VERIFIER_SIZE);
5388
5389         res->num_devs = be32_to_cpup(p);
5390
5391         dprintk("%s: num_dev %d\n", __func__, res->num_devs);
5392
5393         if (res->num_devs > NFS4_PNFS_GETDEVLIST_MAXNUM) {
5394                 printk(KERN_ERR "NFS: %s too many result dev_num %u\n",
5395                                 __func__, res->num_devs);
5396                 return -EIO;
5397         }
5398
5399         p = xdr_inline_decode(xdr,
5400                               res->num_devs * NFS4_DEVICEID4_SIZE + 4);
5401         if (unlikely(!p))
5402                 goto out_overflow;
5403         for (i = 0; i < res->num_devs; i++)
5404                 p = xdr_decode_opaque_fixed(p, res->dev_id[i].data,
5405                                             NFS4_DEVICEID4_SIZE);
5406         res->eof = be32_to_cpup(p);
5407         return 0;
5408 out_overflow:
5409         print_overflow_msg(__func__, xdr);
5410         return -EIO;
5411 }
5412
5413 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5414                                 struct pnfs_device *pdev)
5415 {
5416         __be32 *p;
5417         uint32_t len, type;
5418         int status;
5419
5420         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5421         if (status) {
5422                 if (status == -ETOOSMALL) {
5423                         p = xdr_inline_decode(xdr, 4);
5424                         if (unlikely(!p))
5425                                 goto out_overflow;
5426                         pdev->mincount = be32_to_cpup(p);
5427                         dprintk("%s: Min count too small. mincnt = %u\n",
5428                                 __func__, pdev->mincount);
5429                 }
5430                 return status;
5431         }
5432
5433         p = xdr_inline_decode(xdr, 8);
5434         if (unlikely(!p))
5435                 goto out_overflow;
5436         type = be32_to_cpup(p++);
5437         if (type != pdev->layout_type) {
5438                 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5439                         __func__, pdev->layout_type, type);
5440                 return -EINVAL;
5441         }
5442         /*
5443          * Get the length of the opaque device_addr4. xdr_read_pages places
5444          * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5445          * and places the remaining xdr data in xdr_buf->tail
5446          */
5447         pdev->mincount = be32_to_cpup(p);
5448         xdr_read_pages(xdr, pdev->mincount); /* include space for the length */
5449
5450         /* Parse notification bitmap, verifying that it is zero. */
5451         p = xdr_inline_decode(xdr, 4);
5452         if (unlikely(!p))
5453                 goto out_overflow;
5454         len = be32_to_cpup(p);
5455         if (len) {
5456                 uint32_t i;
5457
5458                 p = xdr_inline_decode(xdr, 4 * len);
5459                 if (unlikely(!p))
5460                         goto out_overflow;
5461                 for (i = 0; i < len; i++, p++) {
5462                         if (be32_to_cpup(p)) {
5463                                 dprintk("%s: notifications not supported\n",
5464                                         __func__);
5465                                 return -EIO;
5466                         }
5467                 }
5468         }
5469         return 0;
5470 out_overflow:
5471         print_overflow_msg(__func__, xdr);
5472         return -EIO;
5473 }
5474
5475 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5476                             struct nfs4_layoutget_res *res)
5477 {
5478         __be32 *p;
5479         int status;
5480         u32 layout_count;
5481         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5482         struct kvec *iov = rcvbuf->head;
5483         u32 hdrlen, recvd;
5484
5485         status = decode_op_hdr(xdr, OP_LAYOUTGET);
5486         if (status)
5487                 return status;
5488         p = xdr_inline_decode(xdr, 4);
5489         if (unlikely(!p))
5490                 goto out_overflow;
5491         res->return_on_close = be32_to_cpup(p);
5492         decode_stateid(xdr, &res->stateid);
5493         p = xdr_inline_decode(xdr, 4);
5494         if (unlikely(!p))
5495                 goto out_overflow;
5496         layout_count = be32_to_cpup(p);
5497         if (!layout_count) {
5498                 dprintk("%s: server responded with empty layout array\n",
5499                         __func__);
5500                 return -EINVAL;
5501         }
5502
5503         p = xdr_inline_decode(xdr, 28);
5504         if (unlikely(!p))
5505                 goto out_overflow;
5506         p = xdr_decode_hyper(p, &res->range.offset);
5507         p = xdr_decode_hyper(p, &res->range.length);
5508         res->range.iomode = be32_to_cpup(p++);
5509         res->type = be32_to_cpup(p++);
5510         res->layoutp->len = be32_to_cpup(p);
5511
5512         dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5513                 __func__,
5514                 (unsigned long)res->range.offset,
5515                 (unsigned long)res->range.length,
5516                 res->range.iomode,
5517                 res->type,
5518                 res->layoutp->len);
5519
5520         hdrlen = (u8 *) xdr->p - (u8 *) iov->iov_base;
5521         recvd = req->rq_rcv_buf.len - hdrlen;
5522         if (res->layoutp->len > recvd) {
5523                 dprintk("NFS: server cheating in layoutget reply: "
5524                                 "layout len %u > recvd %u\n",
5525                                 res->layoutp->len, recvd);
5526                 return -EINVAL;
5527         }
5528
5529         xdr_read_pages(xdr, res->layoutp->len);
5530
5531         if (layout_count > 1) {
5532                 /* We only handle a length one array at the moment.  Any
5533                  * further entries are just ignored.  Note that this means
5534                  * the client may see a response that is less than the
5535                  * minimum it requested.
5536                  */
5537                 dprintk("%s: server responded with %d layouts, dropping tail\n",
5538                         __func__, layout_count);
5539         }
5540
5541         return 0;
5542 out_overflow:
5543         print_overflow_msg(__func__, xdr);
5544         return -EIO;
5545 }
5546
5547 static int decode_layoutreturn(struct xdr_stream *xdr,
5548                                struct nfs4_layoutreturn_res *res)
5549 {
5550         __be32 *p;
5551         int status;
5552
5553         status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5554         if (status)
5555                 return status;
5556         p = xdr_inline_decode(xdr, 4);
5557         if (unlikely(!p))
5558                 goto out_overflow;
5559         res->lrs_present = be32_to_cpup(p);
5560         if (res->lrs_present)
5561                 status = decode_stateid(xdr, &res->stateid);
5562         return status;
5563 out_overflow:
5564         print_overflow_msg(__func__, xdr);
5565         return -EIO;
5566 }
5567
5568 static int decode_layoutcommit(struct xdr_stream *xdr,
5569                                struct rpc_rqst *req,
5570                                struct nfs4_layoutcommit_res *res)
5571 {
5572         __be32 *p;
5573         __u32 sizechanged;
5574         int status;
5575
5576         status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5577         res->status = status;
5578         if (status)
5579                 return status;
5580
5581         p = xdr_inline_decode(xdr, 4);
5582         if (unlikely(!p))
5583                 goto out_overflow;
5584         sizechanged = be32_to_cpup(p);
5585
5586         if (sizechanged) {
5587                 /* throw away new size */
5588                 p = xdr_inline_decode(xdr, 8);
5589                 if (unlikely(!p))
5590                         goto out_overflow;
5591         }
5592         return 0;
5593 out_overflow:
5594         print_overflow_msg(__func__, xdr);
5595         return -EIO;
5596 }
5597
5598 static int decode_test_stateid(struct xdr_stream *xdr,
5599                                struct nfs41_test_stateid_res *res)
5600 {
5601         __be32 *p;
5602         int status;
5603         int num_res;
5604
5605         status = decode_op_hdr(xdr, OP_TEST_STATEID);
5606         if (status)
5607                 return status;
5608
5609         p = xdr_inline_decode(xdr, 4);
5610         if (unlikely(!p))
5611                 goto out_overflow;
5612         num_res = be32_to_cpup(p++);
5613         if (num_res != 1)
5614                 goto out;
5615
5616         p = xdr_inline_decode(xdr, 4);
5617         if (unlikely(!p))
5618                 goto out_overflow;
5619         res->status = be32_to_cpup(p++);
5620
5621         return status;
5622 out_overflow:
5623         print_overflow_msg(__func__, xdr);
5624 out:
5625         return -EIO;
5626 }
5627
5628 static int decode_free_stateid(struct xdr_stream *xdr,
5629                                struct nfs41_free_stateid_res *res)
5630 {
5631         __be32 *p;
5632         int status;
5633
5634         status = decode_op_hdr(xdr, OP_FREE_STATEID);
5635         if (status)
5636                 return status;
5637
5638         p = xdr_inline_decode(xdr, 4);
5639         if (unlikely(!p))
5640                 goto out_overflow;
5641         res->status = be32_to_cpup(p++);
5642         return res->status;
5643 out_overflow:
5644         print_overflow_msg(__func__, xdr);
5645         return -EIO;
5646 }
5647 #endif /* CONFIG_NFS_V4_1 */
5648
5649 /*
5650  * END OF "GENERIC" DECODE ROUTINES.
5651  */
5652
5653 /*
5654  * Decode OPEN_DOWNGRADE response
5655  */
5656 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
5657                                        struct xdr_stream *xdr,
5658                                        struct nfs_closeres *res)
5659 {
5660         struct compound_hdr hdr;
5661         int status;
5662
5663         status = decode_compound_hdr(xdr, &hdr);
5664         if (status)
5665                 goto out;
5666         status = decode_sequence(xdr, &res->seq_res, rqstp);
5667         if (status)
5668                 goto out;
5669         status = decode_putfh(xdr);
5670         if (status)
5671                 goto out;
5672         status = decode_open_downgrade(xdr, res);
5673         if (status != 0)
5674                 goto out;
5675         decode_getfattr(xdr, res->fattr, res->server);
5676 out:
5677         return status;
5678 }
5679
5680 /*
5681  * Decode ACCESS response
5682  */
5683 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5684                                struct nfs4_accessres *res)
5685 {
5686         struct compound_hdr hdr;
5687         int status;
5688
5689         status = decode_compound_hdr(xdr, &hdr);
5690         if (status)
5691                 goto out;
5692         status = decode_sequence(xdr, &res->seq_res, rqstp);
5693         if (status)
5694                 goto out;
5695         status = decode_putfh(xdr);
5696         if (status != 0)
5697                 goto out;
5698         status = decode_access(xdr, res);
5699         if (status != 0)
5700                 goto out;
5701         decode_getfattr(xdr, res->fattr, res->server);
5702 out:
5703         return status;
5704 }
5705
5706 /*
5707  * Decode LOOKUP response
5708  */
5709 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5710                                struct nfs4_lookup_res *res)
5711 {
5712         struct compound_hdr hdr;
5713         int status;
5714
5715         status = decode_compound_hdr(xdr, &hdr);
5716         if (status)
5717                 goto out;
5718         status = decode_sequence(xdr, &res->seq_res, rqstp);
5719         if (status)
5720                 goto out;
5721         status = decode_putfh(xdr);
5722         if (status)
5723                 goto out;
5724         status = decode_lookup(xdr);
5725         if (status)
5726                 goto out;
5727         status = decode_getfh(xdr, res->fh);
5728         if (status)
5729                 goto out;
5730         status = decode_getfattr(xdr, res->fattr, res->server);
5731 out:
5732         return status;
5733 }
5734
5735 /*
5736  * Decode LOOKUP_ROOT response
5737  */
5738 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
5739                                     struct xdr_stream *xdr,
5740                                     struct nfs4_lookup_res *res)
5741 {
5742         struct compound_hdr hdr;
5743         int status;
5744
5745         status = decode_compound_hdr(xdr, &hdr);
5746         if (status)
5747                 goto out;
5748         status = decode_sequence(xdr, &res->seq_res, rqstp);
5749         if (status)
5750                 goto out;
5751         status = decode_putrootfh(xdr);
5752         if (status)
5753                 goto out;
5754         status = decode_getfh(xdr, res->fh);
5755         if (status == 0)
5756                 status = decode_getfattr(xdr, res->fattr, res->server);
5757 out:
5758         return status;
5759 }
5760
5761 /*
5762  * Decode REMOVE response
5763  */
5764 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5765                                struct nfs_removeres *res)
5766 {
5767         struct compound_hdr hdr;
5768         int status;
5769
5770         status = decode_compound_hdr(xdr, &hdr);
5771         if (status)
5772                 goto out;
5773         status = decode_sequence(xdr, &res->seq_res, rqstp);
5774         if (status)
5775                 goto out;
5776         status = decode_putfh(xdr);
5777         if (status)
5778                 goto out;
5779         status = decode_remove(xdr, &res->cinfo);
5780         if (status)
5781                 goto out;
5782         decode_getfattr(xdr, res->dir_attr, res->server);
5783 out:
5784         return status;
5785 }
5786
5787 /*
5788  * Decode RENAME response
5789  */
5790 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5791                                struct nfs_renameres *res)
5792 {
5793         struct compound_hdr hdr;
5794         int status;
5795
5796         status = decode_compound_hdr(xdr, &hdr);
5797         if (status)
5798                 goto out;
5799         status = decode_sequence(xdr, &res->seq_res, rqstp);
5800         if (status)
5801                 goto out;
5802         status = decode_putfh(xdr);
5803         if (status)
5804                 goto out;
5805         status = decode_savefh(xdr);
5806         if (status)
5807                 goto out;
5808         status = decode_putfh(xdr);
5809         if (status)
5810                 goto out;
5811         status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
5812         if (status)
5813                 goto out;
5814         /* Current FH is target directory */
5815         if (decode_getfattr(xdr, res->new_fattr, res->server))
5816                 goto out;
5817         status = decode_restorefh(xdr);
5818         if (status)
5819                 goto out;
5820         decode_getfattr(xdr, res->old_fattr, res->server);
5821 out:
5822         return status;
5823 }
5824
5825 /*
5826  * Decode LINK response
5827  */
5828 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5829                              struct nfs4_link_res *res)
5830 {
5831         struct compound_hdr hdr;
5832         int status;
5833
5834         status = decode_compound_hdr(xdr, &hdr);
5835         if (status)
5836                 goto out;
5837         status = decode_sequence(xdr, &res->seq_res, rqstp);
5838         if (status)
5839                 goto out;
5840         status = decode_putfh(xdr);
5841         if (status)
5842                 goto out;
5843         status = decode_savefh(xdr);
5844         if (status)
5845                 goto out;
5846         status = decode_putfh(xdr);
5847         if (status)
5848                 goto out;
5849         status = decode_link(xdr, &res->cinfo);
5850         if (status)
5851                 goto out;
5852         /*
5853          * Note order: OP_LINK leaves the directory as the current
5854          *             filehandle.
5855          */
5856         if (decode_getfattr(xdr, res->dir_attr, res->server))
5857                 goto out;
5858         status = decode_restorefh(xdr);
5859         if (status)
5860                 goto out;
5861         decode_getfattr(xdr, res->fattr, res->server);
5862 out:
5863         return status;
5864 }
5865
5866 /*
5867  * Decode CREATE response
5868  */
5869 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5870                                struct nfs4_create_res *res)
5871 {
5872         struct compound_hdr hdr;
5873         int status;
5874
5875         status = decode_compound_hdr(xdr, &hdr);
5876         if (status)
5877                 goto out;
5878         status = decode_sequence(xdr, &res->seq_res, rqstp);
5879         if (status)
5880                 goto out;
5881         status = decode_putfh(xdr);
5882         if (status)
5883                 goto out;
5884         status = decode_savefh(xdr);
5885         if (status)
5886                 goto out;
5887         status = decode_create(xdr, &res->dir_cinfo);
5888         if (status)
5889                 goto out;
5890         status = decode_getfh(xdr, res->fh);
5891         if (status)
5892                 goto out;
5893         if (decode_getfattr(xdr, res->fattr, res->server))
5894                 goto out;
5895         status = decode_restorefh(xdr);
5896         if (status)
5897                 goto out;
5898         decode_getfattr(xdr, res->dir_fattr, res->server);
5899 out:
5900         return status;
5901 }
5902
5903 /*
5904  * Decode SYMLINK response
5905  */
5906 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5907                                 struct nfs4_create_res *res)
5908 {
5909         return nfs4_xdr_dec_create(rqstp, xdr, res);
5910 }
5911
5912 /*
5913  * Decode GETATTR response
5914  */
5915 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5916                                 struct nfs4_getattr_res *res)
5917 {
5918         struct compound_hdr hdr;
5919         int status;
5920
5921         status = decode_compound_hdr(xdr, &hdr);
5922         if (status)
5923                 goto out;
5924         status = decode_sequence(xdr, &res->seq_res, rqstp);
5925         if (status)
5926                 goto out;
5927         status = decode_putfh(xdr);
5928         if (status)
5929                 goto out;
5930         status = decode_getfattr(xdr, res->fattr, res->server);
5931 out:
5932         return status;
5933 }
5934
5935 /*
5936  * Encode an SETACL request
5937  */
5938 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
5939                                 struct nfs_setaclargs *args)
5940 {
5941         struct compound_hdr hdr = {
5942                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
5943         };
5944
5945         encode_compound_hdr(xdr, req, &hdr);
5946         encode_sequence(xdr, &args->seq_args, &hdr);
5947         encode_putfh(xdr, args->fh, &hdr);
5948         encode_setacl(xdr, args, &hdr);
5949         encode_nops(&hdr);
5950 }
5951
5952 /*
5953  * Decode SETACL response
5954  */
5955 static int
5956 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5957                     struct nfs_setaclres *res)
5958 {
5959         struct compound_hdr hdr;
5960         int status;
5961
5962         status = decode_compound_hdr(xdr, &hdr);
5963         if (status)
5964                 goto out;
5965         status = decode_sequence(xdr, &res->seq_res, rqstp);
5966         if (status)
5967                 goto out;
5968         status = decode_putfh(xdr);
5969         if (status)
5970                 goto out;
5971         status = decode_setattr(xdr);
5972 out:
5973         return status;
5974 }
5975
5976 /*
5977  * Decode GETACL response
5978  */
5979 static int
5980 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5981                     struct nfs_getaclres *res)
5982 {
5983         struct compound_hdr hdr;
5984         int status;
5985
5986         if (res->acl_scratch != NULL) {
5987                 void *p = page_address(res->acl_scratch);
5988                 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
5989         }
5990         status = decode_compound_hdr(xdr, &hdr);
5991         if (status)
5992                 goto out;
5993         status = decode_sequence(xdr, &res->seq_res, rqstp);
5994         if (status)
5995                 goto out;
5996         status = decode_putfh(xdr);
5997         if (status)
5998                 goto out;
5999         status = decode_getacl(xdr, rqstp, res);
6000
6001 out:
6002         return status;
6003 }
6004
6005 /*
6006  * Decode CLOSE response
6007  */
6008 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6009                               struct nfs_closeres *res)
6010 {
6011         struct compound_hdr hdr;
6012         int status;
6013
6014         status = decode_compound_hdr(xdr, &hdr);
6015         if (status)
6016                 goto out;
6017         status = decode_sequence(xdr, &res->seq_res, rqstp);
6018         if (status)
6019                 goto out;
6020         status = decode_putfh(xdr);
6021         if (status)
6022                 goto out;
6023         status = decode_close(xdr, res);
6024         if (status != 0)
6025                 goto out;
6026         /*
6027          * Note: Server may do delete on close for this file
6028          *      in which case the getattr call will fail with
6029          *      an ESTALE error. Shouldn't be a problem,
6030          *      though, since fattr->valid will remain unset.
6031          */
6032         decode_getfattr(xdr, res->fattr, res->server);
6033 out:
6034         return status;
6035 }
6036
6037 /*
6038  * Decode OPEN response
6039  */
6040 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6041                              struct nfs_openres *res)
6042 {
6043         struct compound_hdr hdr;
6044         int status;
6045
6046         status = decode_compound_hdr(xdr, &hdr);
6047         if (status)
6048                 goto out;
6049         status = decode_sequence(xdr, &res->seq_res, rqstp);
6050         if (status)
6051                 goto out;
6052         status = decode_putfh(xdr);
6053         if (status)
6054                 goto out;
6055         status = decode_savefh(xdr);
6056         if (status)
6057                 goto out;
6058         status = decode_open(xdr, res);
6059         if (status)
6060                 goto out;
6061         if (decode_getfh(xdr, &res->fh) != 0)
6062                 goto out;
6063         if (decode_getfattr(xdr, res->f_attr, res->server) != 0)
6064                 goto out;
6065         if (decode_restorefh(xdr) != 0)
6066                 goto out;
6067         decode_getfattr(xdr, res->dir_attr, res->server);
6068 out:
6069         return status;
6070 }
6071
6072 /*
6073  * Decode OPEN_CONFIRM response
6074  */
6075 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6076                                      struct xdr_stream *xdr,
6077                                      struct nfs_open_confirmres *res)
6078 {
6079         struct compound_hdr hdr;
6080         int status;
6081
6082         status = decode_compound_hdr(xdr, &hdr);
6083         if (status)
6084                 goto out;
6085         status = decode_putfh(xdr);
6086         if (status)
6087                 goto out;
6088         status = decode_open_confirm(xdr, res);
6089 out:
6090         return status;
6091 }
6092
6093 /*
6094  * Decode OPEN response
6095  */
6096 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6097                                     struct xdr_stream *xdr,
6098                                     struct nfs_openres *res)
6099 {
6100         struct compound_hdr hdr;
6101         int status;
6102
6103         status = decode_compound_hdr(xdr, &hdr);
6104         if (status)
6105                 goto out;
6106         status = decode_sequence(xdr, &res->seq_res, rqstp);
6107         if (status)
6108                 goto out;
6109         status = decode_putfh(xdr);
6110         if (status)
6111                 goto out;
6112         status = decode_open(xdr, res);
6113         if (status)
6114                 goto out;
6115         decode_getfattr(xdr, res->f_attr, res->server);
6116 out:
6117         return status;
6118 }
6119
6120 /*
6121  * Decode SETATTR response
6122  */
6123 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6124                                 struct xdr_stream *xdr,
6125                                 struct nfs_setattrres *res)
6126 {
6127         struct compound_hdr hdr;
6128         int status;
6129
6130         status = decode_compound_hdr(xdr, &hdr);
6131         if (status)
6132                 goto out;
6133         status = decode_sequence(xdr, &res->seq_res, rqstp);
6134         if (status)
6135                 goto out;
6136         status = decode_putfh(xdr);
6137         if (status)
6138                 goto out;
6139         status = decode_setattr(xdr);
6140         if (status)
6141                 goto out;
6142         decode_getfattr(xdr, res->fattr, res->server);
6143 out:
6144         return status;
6145 }
6146
6147 /*
6148  * Decode LOCK response
6149  */
6150 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6151                              struct nfs_lock_res *res)
6152 {
6153         struct compound_hdr hdr;
6154         int status;
6155
6156         status = decode_compound_hdr(xdr, &hdr);
6157         if (status)
6158                 goto out;
6159         status = decode_sequence(xdr, &res->seq_res, rqstp);
6160         if (status)
6161                 goto out;
6162         status = decode_putfh(xdr);
6163         if (status)
6164                 goto out;
6165         status = decode_lock(xdr, res);
6166 out:
6167         return status;
6168 }
6169
6170 /*
6171  * Decode LOCKT response
6172  */
6173 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6174                               struct nfs_lockt_res *res)
6175 {
6176         struct compound_hdr hdr;
6177         int status;
6178
6179         status = decode_compound_hdr(xdr, &hdr);
6180         if (status)
6181                 goto out;
6182         status = decode_sequence(xdr, &res->seq_res, rqstp);
6183         if (status)
6184                 goto out;
6185         status = decode_putfh(xdr);
6186         if (status)
6187                 goto out;
6188         status = decode_lockt(xdr, res);
6189 out:
6190         return status;
6191 }
6192
6193 /*
6194  * Decode LOCKU response
6195  */
6196 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6197                               struct nfs_locku_res *res)
6198 {
6199         struct compound_hdr hdr;
6200         int status;
6201
6202         status = decode_compound_hdr(xdr, &hdr);
6203         if (status)
6204                 goto out;
6205         status = decode_sequence(xdr, &res->seq_res, rqstp);
6206         if (status)
6207                 goto out;
6208         status = decode_putfh(xdr);
6209         if (status)
6210                 goto out;
6211         status = decode_locku(xdr, res);
6212 out:
6213         return status;
6214 }
6215
6216 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6217                                           struct xdr_stream *xdr, void *dummy)
6218 {
6219         struct compound_hdr hdr;
6220         int status;
6221
6222         status = decode_compound_hdr(xdr, &hdr);
6223         if (!status)
6224                 status = decode_release_lockowner(xdr);
6225         return status;
6226 }
6227
6228 /*
6229  * Decode READLINK response
6230  */
6231 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6232                                  struct xdr_stream *xdr,
6233                                  struct nfs4_readlink_res *res)
6234 {
6235         struct compound_hdr hdr;
6236         int status;
6237
6238         status = decode_compound_hdr(xdr, &hdr);
6239         if (status)
6240                 goto out;
6241         status = decode_sequence(xdr, &res->seq_res, rqstp);
6242         if (status)
6243                 goto out;
6244         status = decode_putfh(xdr);
6245         if (status)
6246                 goto out;
6247         status = decode_readlink(xdr, rqstp);
6248 out:
6249         return status;
6250 }
6251
6252 /*
6253  * Decode READDIR response
6254  */
6255 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6256                                 struct nfs4_readdir_res *res)
6257 {
6258         struct compound_hdr hdr;
6259         int status;
6260
6261         status = decode_compound_hdr(xdr, &hdr);
6262         if (status)
6263                 goto out;
6264         status = decode_sequence(xdr, &res->seq_res, rqstp);
6265         if (status)
6266                 goto out;
6267         status = decode_putfh(xdr);
6268         if (status)
6269                 goto out;
6270         status = decode_readdir(xdr, rqstp, res);
6271 out:
6272         return status;
6273 }
6274
6275 /*
6276  * Decode Read response
6277  */
6278 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6279                              struct nfs_readres *res)
6280 {
6281         struct compound_hdr hdr;
6282         int status;
6283
6284         status = decode_compound_hdr(xdr, &hdr);
6285         if (status)
6286                 goto out;
6287         status = decode_sequence(xdr, &res->seq_res, rqstp);
6288         if (status)
6289                 goto out;
6290         status = decode_putfh(xdr);
6291         if (status)
6292                 goto out;
6293         status = decode_read(xdr, rqstp, res);
6294         if (!status)
6295                 status = res->count;
6296 out:
6297         return status;
6298 }
6299
6300 /*
6301  * Decode WRITE response
6302  */
6303 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6304                               struct nfs_writeres *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_write(xdr, res);
6319         if (status)
6320                 goto out;
6321         if (res->fattr)
6322                 decode_getfattr(xdr, res->fattr, res->server);
6323         if (!status)
6324                 status = res->count;
6325 out:
6326         return status;
6327 }
6328
6329 /*
6330  * Decode COMMIT response
6331  */
6332 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6333                                struct nfs_writeres *res)
6334 {
6335         struct compound_hdr hdr;
6336         int status;
6337
6338         status = decode_compound_hdr(xdr, &hdr);
6339         if (status)
6340                 goto out;
6341         status = decode_sequence(xdr, &res->seq_res, rqstp);
6342         if (status)
6343                 goto out;
6344         status = decode_putfh(xdr);
6345         if (status)
6346                 goto out;
6347         status = decode_commit(xdr, res);
6348         if (status)
6349                 goto out;
6350         if (res->fattr)
6351                 decode_getfattr(xdr, res->fattr, res->server);
6352 out:
6353         return status;
6354 }
6355
6356 /*
6357  * Decode FSINFO response
6358  */
6359 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6360                                struct nfs4_fsinfo_res *res)
6361 {
6362         struct compound_hdr hdr;
6363         int status;
6364
6365         status = decode_compound_hdr(xdr, &hdr);
6366         if (!status)
6367                 status = decode_sequence(xdr, &res->seq_res, req);
6368         if (!status)
6369                 status = decode_putfh(xdr);
6370         if (!status)
6371                 status = decode_fsinfo(xdr, res->fsinfo);
6372         return status;
6373 }
6374
6375 /*
6376  * Decode PATHCONF response
6377  */
6378 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6379                                  struct nfs4_pathconf_res *res)
6380 {
6381         struct compound_hdr hdr;
6382         int status;
6383
6384         status = decode_compound_hdr(xdr, &hdr);
6385         if (!status)
6386                 status = decode_sequence(xdr, &res->seq_res, req);
6387         if (!status)
6388                 status = decode_putfh(xdr);
6389         if (!status)
6390                 status = decode_pathconf(xdr, res->pathconf);
6391         return status;
6392 }
6393
6394 /*
6395  * Decode STATFS response
6396  */
6397 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6398                                struct nfs4_statfs_res *res)
6399 {
6400         struct compound_hdr hdr;
6401         int status;
6402
6403         status = decode_compound_hdr(xdr, &hdr);
6404         if (!status)
6405                 status = decode_sequence(xdr, &res->seq_res, req);
6406         if (!status)
6407                 status = decode_putfh(xdr);
6408         if (!status)
6409                 status = decode_statfs(xdr, res->fsstat);
6410         return status;
6411 }
6412
6413 /*
6414  * Decode GETATTR_BITMAP response
6415  */
6416 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6417                                     struct xdr_stream *xdr,
6418                                     struct nfs4_server_caps_res *res)
6419 {
6420         struct compound_hdr hdr;
6421         int status;
6422
6423         status = decode_compound_hdr(xdr, &hdr);
6424         if (status)
6425                 goto out;
6426         status = decode_sequence(xdr, &res->seq_res, req);
6427         if (status)
6428                 goto out;
6429         status = decode_putfh(xdr);
6430         if (status)
6431                 goto out;
6432         status = decode_server_caps(xdr, res);
6433 out:
6434         return status;
6435 }
6436
6437 /*
6438  * Decode RENEW response
6439  */
6440 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6441                               void *__unused)
6442 {
6443         struct compound_hdr hdr;
6444         int status;
6445
6446         status = decode_compound_hdr(xdr, &hdr);
6447         if (!status)
6448                 status = decode_renew(xdr);
6449         return status;
6450 }
6451
6452 /*
6453  * Decode SETCLIENTID response
6454  */
6455 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6456                                     struct xdr_stream *xdr,
6457                                     struct nfs4_setclientid_res *res)
6458 {
6459         struct compound_hdr hdr;
6460         int status;
6461
6462         status = decode_compound_hdr(xdr, &hdr);
6463         if (!status)
6464                 status = decode_setclientid(xdr, res);
6465         return status;
6466 }
6467
6468 /*
6469  * Decode SETCLIENTID_CONFIRM response
6470  */
6471 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6472                                             struct xdr_stream *xdr,
6473                                             struct nfs_fsinfo *fsinfo)
6474 {
6475         struct compound_hdr hdr;
6476         int status;
6477
6478         status = decode_compound_hdr(xdr, &hdr);
6479         if (!status)
6480                 status = decode_setclientid_confirm(xdr);
6481         if (!status)
6482                 status = decode_putrootfh(xdr);
6483         if (!status)
6484                 status = decode_fsinfo(xdr, fsinfo);
6485         return status;
6486 }
6487
6488 /*
6489  * Decode DELEGRETURN response
6490  */
6491 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6492                                     struct xdr_stream *xdr,
6493                                     struct nfs4_delegreturnres *res)
6494 {
6495         struct compound_hdr hdr;
6496         int status;
6497
6498         status = decode_compound_hdr(xdr, &hdr);
6499         if (status)
6500                 goto out;
6501         status = decode_sequence(xdr, &res->seq_res, rqstp);
6502         if (status)
6503                 goto out;
6504         status = decode_putfh(xdr);
6505         if (status != 0)
6506                 goto out;
6507         status = decode_delegreturn(xdr);
6508         if (status != 0)
6509                 goto out;
6510         decode_getfattr(xdr, res->fattr, res->server);
6511 out:
6512         return status;
6513 }
6514
6515 /*
6516  * Decode FS_LOCATIONS response
6517  */
6518 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6519                                      struct xdr_stream *xdr,
6520                                      struct nfs4_fs_locations_res *res)
6521 {
6522         struct compound_hdr hdr;
6523         int status;
6524
6525         status = decode_compound_hdr(xdr, &hdr);
6526         if (status)
6527                 goto out;
6528         status = decode_sequence(xdr, &res->seq_res, req);
6529         if (status)
6530                 goto out;
6531         status = decode_putfh(xdr);
6532         if (status)
6533                 goto out;
6534         status = decode_lookup(xdr);
6535         if (status)
6536                 goto out;
6537         xdr_enter_page(xdr, PAGE_SIZE);
6538         status = decode_getfattr_generic(xdr, &res->fs_locations->fattr,
6539                                          NULL, res->fs_locations,
6540                                          res->fs_locations->server);
6541 out:
6542         return status;
6543 }
6544
6545 /*
6546  * Decode SECINFO response
6547  */
6548 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6549                                 struct xdr_stream *xdr,
6550                                 struct nfs4_secinfo_res *res)
6551 {
6552         struct compound_hdr hdr;
6553         int status;
6554
6555         status = decode_compound_hdr(xdr, &hdr);
6556         if (status)
6557                 goto out;
6558         status = decode_sequence(xdr, &res->seq_res, rqstp);
6559         if (status)
6560                 goto out;
6561         status = decode_putfh(xdr);
6562         if (status)
6563                 goto out;
6564         status = decode_secinfo(xdr, res);
6565 out:
6566         return status;
6567 }
6568
6569 #if defined(CONFIG_NFS_V4_1)
6570 /*
6571  * Decode EXCHANGE_ID response
6572  */
6573 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
6574                                     struct xdr_stream *xdr,
6575                                     void *res)
6576 {
6577         struct compound_hdr hdr;
6578         int status;
6579
6580         status = decode_compound_hdr(xdr, &hdr);
6581         if (!status)
6582                 status = decode_exchange_id(xdr, res);
6583         return status;
6584 }
6585
6586 /*
6587  * Decode CREATE_SESSION response
6588  */
6589 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
6590                                        struct xdr_stream *xdr,
6591                                        struct nfs41_create_session_res *res)
6592 {
6593         struct compound_hdr hdr;
6594         int status;
6595
6596         status = decode_compound_hdr(xdr, &hdr);
6597         if (!status)
6598                 status = decode_create_session(xdr, res);
6599         return status;
6600 }
6601
6602 /*
6603  * Decode DESTROY_SESSION response
6604  */
6605 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
6606                                         struct xdr_stream *xdr,
6607                                         void *res)
6608 {
6609         struct compound_hdr hdr;
6610         int status;
6611
6612         status = decode_compound_hdr(xdr, &hdr);
6613         if (!status)
6614                 status = decode_destroy_session(xdr, res);
6615         return status;
6616 }
6617
6618 /*
6619  * Decode SEQUENCE response
6620  */
6621 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
6622                                  struct xdr_stream *xdr,
6623                                  struct nfs4_sequence_res *res)
6624 {
6625         struct compound_hdr hdr;
6626         int status;
6627
6628         status = decode_compound_hdr(xdr, &hdr);
6629         if (!status)
6630                 status = decode_sequence(xdr, res, rqstp);
6631         return status;
6632 }
6633
6634 /*
6635  * Decode GET_LEASE_TIME response
6636  */
6637 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
6638                                        struct xdr_stream *xdr,
6639                                        struct nfs4_get_lease_time_res *res)
6640 {
6641         struct compound_hdr hdr;
6642         int status;
6643
6644         status = decode_compound_hdr(xdr, &hdr);
6645         if (!status)
6646                 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
6647         if (!status)
6648                 status = decode_putrootfh(xdr);
6649         if (!status)
6650                 status = decode_fsinfo(xdr, res->lr_fsinfo);
6651         return status;
6652 }
6653
6654 /*
6655  * Decode RECLAIM_COMPLETE response
6656  */
6657 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
6658                                          struct xdr_stream *xdr,
6659                                          struct nfs41_reclaim_complete_res *res)
6660 {
6661         struct compound_hdr hdr;
6662         int status;
6663
6664         status = decode_compound_hdr(xdr, &hdr);
6665         if (!status)
6666                 status = decode_sequence(xdr, &res->seq_res, rqstp);
6667         if (!status)
6668                 status = decode_reclaim_complete(xdr, (void *)NULL);
6669         return status;
6670 }
6671
6672 /*
6673  * Decode GETDEVICELIST response
6674  */
6675 static int nfs4_xdr_dec_getdevicelist(struct rpc_rqst *rqstp,
6676                                       struct xdr_stream *xdr,
6677                                       struct nfs4_getdevicelist_res *res)
6678 {
6679         struct compound_hdr hdr;
6680         int status;
6681
6682         dprintk("encoding getdevicelist!\n");
6683
6684         status = decode_compound_hdr(xdr, &hdr);
6685         if (status != 0)
6686                 goto out;
6687         status = decode_sequence(xdr, &res->seq_res, rqstp);
6688         if (status != 0)
6689                 goto out;
6690         status = decode_putfh(xdr);
6691         if (status != 0)
6692                 goto out;
6693         status = decode_getdevicelist(xdr, res->devlist);
6694 out:
6695         return status;
6696 }
6697
6698 /*
6699  * Decode GETDEVINFO response
6700  */
6701 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
6702                                       struct xdr_stream *xdr,
6703                                       struct nfs4_getdeviceinfo_res *res)
6704 {
6705         struct compound_hdr hdr;
6706         int status;
6707
6708         status = decode_compound_hdr(xdr, &hdr);
6709         if (status != 0)
6710                 goto out;
6711         status = decode_sequence(xdr, &res->seq_res, rqstp);
6712         if (status != 0)
6713                 goto out;
6714         status = decode_getdeviceinfo(xdr, res->pdev);
6715 out:
6716         return status;
6717 }
6718
6719 /*
6720  * Decode LAYOUTGET response
6721  */
6722 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
6723                                   struct xdr_stream *xdr,
6724                                   struct nfs4_layoutget_res *res)
6725 {
6726         struct compound_hdr hdr;
6727         int status;
6728
6729         status = decode_compound_hdr(xdr, &hdr);
6730         if (status)
6731                 goto out;
6732         status = decode_sequence(xdr, &res->seq_res, rqstp);
6733         if (status)
6734                 goto out;
6735         status = decode_putfh(xdr);
6736         if (status)
6737                 goto out;
6738         status = decode_layoutget(xdr, rqstp, res);
6739 out:
6740         return status;
6741 }
6742
6743 /*
6744  * Decode LAYOUTRETURN response
6745  */
6746 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
6747                                      struct xdr_stream *xdr,
6748                                      struct nfs4_layoutreturn_res *res)
6749 {
6750         struct compound_hdr hdr;
6751         int status;
6752
6753         status = decode_compound_hdr(xdr, &hdr);
6754         if (status)
6755                 goto out;
6756         status = decode_sequence(xdr, &res->seq_res, rqstp);
6757         if (status)
6758                 goto out;
6759         status = decode_putfh(xdr);
6760         if (status)
6761                 goto out;
6762         status = decode_layoutreturn(xdr, res);
6763 out:
6764         return status;
6765 }
6766
6767 /*
6768  * Decode LAYOUTCOMMIT response
6769  */
6770 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
6771                                      struct xdr_stream *xdr,
6772                                      struct nfs4_layoutcommit_res *res)
6773 {
6774         struct compound_hdr hdr;
6775         int status;
6776
6777         status = decode_compound_hdr(xdr, &hdr);
6778         if (status)
6779                 goto out;
6780         status = decode_sequence(xdr, &res->seq_res, rqstp);
6781         if (status)
6782                 goto out;
6783         status = decode_putfh(xdr);
6784         if (status)
6785                 goto out;
6786         status = decode_layoutcommit(xdr, rqstp, res);
6787         if (status)
6788                 goto out;
6789         decode_getfattr(xdr, res->fattr, res->server);
6790 out:
6791         return status;
6792 }
6793
6794 /*
6795  * Decode SECINFO_NO_NAME response
6796  */
6797 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
6798                                         struct xdr_stream *xdr,
6799                                         struct nfs4_secinfo_res *res)
6800 {
6801         struct compound_hdr hdr;
6802         int status;
6803
6804         status = decode_compound_hdr(xdr, &hdr);
6805         if (status)
6806                 goto out;
6807         status = decode_sequence(xdr, &res->seq_res, rqstp);
6808         if (status)
6809                 goto out;
6810         status = decode_putrootfh(xdr);
6811         if (status)
6812                 goto out;
6813         status = decode_secinfo(xdr, res);
6814 out:
6815         return status;
6816 }
6817
6818 /*
6819  * Decode TEST_STATEID response
6820  */
6821 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
6822                                      struct xdr_stream *xdr,
6823                                      struct nfs41_test_stateid_res *res)
6824 {
6825         struct compound_hdr hdr;
6826         int status;
6827
6828         status = decode_compound_hdr(xdr, &hdr);
6829         if (status)
6830                 goto out;
6831         status = decode_sequence(xdr, &res->seq_res, rqstp);
6832         if (status)
6833                 goto out;
6834         status = decode_test_stateid(xdr, res);
6835 out:
6836         return status;
6837 }
6838
6839 /*
6840  * Decode FREE_STATEID response
6841  */
6842 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
6843                                      struct xdr_stream *xdr,
6844                                      struct nfs41_free_stateid_res *res)
6845 {
6846         struct compound_hdr hdr;
6847         int status;
6848
6849         status = decode_compound_hdr(xdr, &hdr);
6850         if (status)
6851                 goto out;
6852         status = decode_sequence(xdr, &res->seq_res, rqstp);
6853         if (status)
6854                 goto out;
6855         status = decode_free_stateid(xdr, res);
6856 out:
6857         return status;
6858 }
6859 #endif /* CONFIG_NFS_V4_1 */
6860
6861 /**
6862  * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
6863  *                      the local page cache.
6864  * @xdr: XDR stream where entry resides
6865  * @entry: buffer to fill in with entry data
6866  * @plus: boolean indicating whether this should be a readdirplus entry
6867  *
6868  * Returns zero if successful, otherwise a negative errno value is
6869  * returned.
6870  *
6871  * This function is not invoked during READDIR reply decoding, but
6872  * rather whenever an application invokes the getdents(2) system call
6873  * on a directory already in our cache.
6874  */
6875 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
6876                        int plus)
6877 {
6878         uint32_t bitmap[3] = {0};
6879         uint32_t len;
6880         __be32 *p = xdr_inline_decode(xdr, 4);
6881         if (unlikely(!p))
6882                 goto out_overflow;
6883         if (*p == xdr_zero) {
6884                 p = xdr_inline_decode(xdr, 4);
6885                 if (unlikely(!p))
6886                         goto out_overflow;
6887                 if (*p == xdr_zero)
6888                         return -EAGAIN;
6889                 entry->eof = 1;
6890                 return -EBADCOOKIE;
6891         }
6892
6893         p = xdr_inline_decode(xdr, 12);
6894         if (unlikely(!p))
6895                 goto out_overflow;
6896         entry->prev_cookie = entry->cookie;
6897         p = xdr_decode_hyper(p, &entry->cookie);
6898         entry->len = be32_to_cpup(p);
6899
6900         p = xdr_inline_decode(xdr, entry->len);
6901         if (unlikely(!p))
6902                 goto out_overflow;
6903         entry->name = (const char *) p;
6904
6905         /*
6906          * In case the server doesn't return an inode number,
6907          * we fake one here.  (We don't use inode number 0,
6908          * since glibc seems to choke on it...)
6909          */
6910         entry->ino = 1;
6911         entry->fattr->valid = 0;
6912
6913         if (decode_attr_bitmap(xdr, bitmap) < 0)
6914                 goto out_overflow;
6915
6916         if (decode_attr_length(xdr, &len, &p) < 0)
6917                 goto out_overflow;
6918
6919         if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
6920                                   NULL, entry->server) < 0)
6921                 goto out_overflow;
6922         if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
6923                 entry->ino = entry->fattr->mounted_on_fileid;
6924         else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
6925                 entry->ino = entry->fattr->fileid;
6926
6927         entry->d_type = DT_UNKNOWN;
6928         if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
6929                 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
6930
6931         return 0;
6932
6933 out_overflow:
6934         print_overflow_msg(__func__, xdr);
6935         return -EAGAIN;
6936 }
6937
6938 /*
6939  * We need to translate between nfs status return values and
6940  * the local errno values which may not be the same.
6941  */
6942 static struct {
6943         int stat;
6944         int errno;
6945 } nfs_errtbl[] = {
6946         { NFS4_OK,              0               },
6947         { NFS4ERR_PERM,         -EPERM          },
6948         { NFS4ERR_NOENT,        -ENOENT         },
6949         { NFS4ERR_IO,           -errno_NFSERR_IO},
6950         { NFS4ERR_NXIO,         -ENXIO          },
6951         { NFS4ERR_ACCESS,       -EACCES         },
6952         { NFS4ERR_EXIST,        -EEXIST         },
6953         { NFS4ERR_XDEV,         -EXDEV          },
6954         { NFS4ERR_NOTDIR,       -ENOTDIR        },
6955         { NFS4ERR_ISDIR,        -EISDIR         },
6956         { NFS4ERR_INVAL,        -EINVAL         },
6957         { NFS4ERR_FBIG,         -EFBIG          },
6958         { NFS4ERR_NOSPC,        -ENOSPC         },
6959         { NFS4ERR_ROFS,         -EROFS          },
6960         { NFS4ERR_MLINK,        -EMLINK         },
6961         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
6962         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
6963         { NFS4ERR_DQUOT,        -EDQUOT         },
6964         { NFS4ERR_STALE,        -ESTALE         },
6965         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
6966         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
6967         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
6968         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
6969         { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
6970         { NFS4ERR_BADTYPE,      -EBADTYPE       },
6971         { NFS4ERR_LOCKED,       -EAGAIN         },
6972         { NFS4ERR_SYMLINK,      -ELOOP          },
6973         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
6974         { NFS4ERR_DEADLOCK,     -EDEADLK        },
6975         { -1,                   -EIO            }
6976 };
6977
6978 /*
6979  * Convert an NFS error code to a local one.
6980  * This one is used jointly by NFSv2 and NFSv3.
6981  */
6982 static int
6983 nfs4_stat_to_errno(int stat)
6984 {
6985         int i;
6986         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
6987                 if (nfs_errtbl[i].stat == stat)
6988                         return nfs_errtbl[i].errno;
6989         }
6990         if (stat <= 10000 || stat > 10100) {
6991                 /* The server is looney tunes. */
6992                 return -EREMOTEIO;
6993         }
6994         /* If we cannot translate the error, the recovery routines should
6995          * handle it.
6996          * Note: remaining NFSv4 error codes have values > 10000, so should
6997          * not conflict with native Linux error codes.
6998          */
6999         return -stat;
7000 }
7001
7002 #define PROC(proc, argtype, restype)                            \
7003 [NFSPROC4_CLNT_##proc] = {                                      \
7004         .p_proc   = NFSPROC4_COMPOUND,                          \
7005         .p_encode = (kxdreproc_t)nfs4_xdr_##argtype,            \
7006         .p_decode = (kxdrdproc_t)nfs4_xdr_##restype,            \
7007         .p_arglen = NFS4_##argtype##_sz,                        \
7008         .p_replen = NFS4_##restype##_sz,                        \
7009         .p_statidx = NFSPROC4_CLNT_##proc,                      \
7010         .p_name   = #proc,                                      \
7011 }
7012
7013 struct rpc_procinfo     nfs4_procedures[] = {
7014         PROC(READ,              enc_read,               dec_read),
7015         PROC(WRITE,             enc_write,              dec_write),
7016         PROC(COMMIT,            enc_commit,             dec_commit),
7017         PROC(OPEN,              enc_open,               dec_open),
7018         PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
7019         PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
7020         PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
7021         PROC(CLOSE,             enc_close,              dec_close),
7022         PROC(SETATTR,           enc_setattr,            dec_setattr),
7023         PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
7024         PROC(RENEW,             enc_renew,              dec_renew),
7025         PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
7026         PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7027         PROC(LOCK,              enc_lock,               dec_lock),
7028         PROC(LOCKT,             enc_lockt,              dec_lockt),
7029         PROC(LOCKU,             enc_locku,              dec_locku),
7030         PROC(ACCESS,            enc_access,             dec_access),
7031         PROC(GETATTR,           enc_getattr,            dec_getattr),
7032         PROC(LOOKUP,            enc_lookup,             dec_lookup),
7033         PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
7034         PROC(REMOVE,            enc_remove,             dec_remove),
7035         PROC(RENAME,            enc_rename,             dec_rename),
7036         PROC(LINK,              enc_link,               dec_link),
7037         PROC(SYMLINK,           enc_symlink,            dec_symlink),
7038         PROC(CREATE,            enc_create,             dec_create),
7039         PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
7040         PROC(STATFS,            enc_statfs,             dec_statfs),
7041         PROC(READLINK,          enc_readlink,           dec_readlink),
7042         PROC(READDIR,           enc_readdir,            dec_readdir),
7043         PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
7044         PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
7045         PROC(GETACL,            enc_getacl,             dec_getacl),
7046         PROC(SETACL,            enc_setacl,             dec_setacl),
7047         PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
7048         PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
7049         PROC(SECINFO,           enc_secinfo,            dec_secinfo),
7050 #if defined(CONFIG_NFS_V4_1)
7051         PROC(EXCHANGE_ID,       enc_exchange_id,        dec_exchange_id),
7052         PROC(CREATE_SESSION,    enc_create_session,     dec_create_session),
7053         PROC(DESTROY_SESSION,   enc_destroy_session,    dec_destroy_session),
7054         PROC(SEQUENCE,          enc_sequence,           dec_sequence),
7055         PROC(GET_LEASE_TIME,    enc_get_lease_time,     dec_get_lease_time),
7056         PROC(RECLAIM_COMPLETE,  enc_reclaim_complete,   dec_reclaim_complete),
7057         PROC(GETDEVICEINFO,     enc_getdeviceinfo,      dec_getdeviceinfo),
7058         PROC(LAYOUTGET,         enc_layoutget,          dec_layoutget),
7059         PROC(LAYOUTCOMMIT,      enc_layoutcommit,       dec_layoutcommit),
7060         PROC(LAYOUTRETURN,      enc_layoutreturn,       dec_layoutreturn),
7061         PROC(SECINFO_NO_NAME,   enc_secinfo_no_name,    dec_secinfo_no_name),
7062         PROC(TEST_STATEID,      enc_test_stateid,       dec_test_stateid),
7063         PROC(FREE_STATEID,      enc_free_stateid,       dec_free_stateid),
7064         PROC(GETDEVICELIST,     enc_getdevicelist,      dec_getdevicelist),
7065 #endif /* CONFIG_NFS_V4_1 */
7066 };
7067
7068 const struct rpc_version nfs_version4 = {
7069         .number                 = 4,
7070         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
7071         .procs                  = nfs4_procedures
7072 };
7073
7074 /*
7075  * Local variables:
7076  *  c-basic-offset: 8
7077  * End:
7078  */