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_uint64(struct xdr_stream *xdr, u64 n)
 913 {
 914         __be32 *p;
 915
 916         p = reserve_space(xdr, 8);
 917         xdr_encode_hyper(p, n);
 918 }
 919
 920 static void encode_nfs4_seqid(struct xdr_stream *xdr,
 921                 const struct nfs_seqid *seqid)
 922 {
 923         encode_uint32(xdr, seqid->sequence->counter);
 924 }
 925
 926 static void encode_compound_hdr(struct xdr_stream *xdr,
 927                                 struct rpc_rqst *req,
 928                                 struct compound_hdr *hdr)
 929 {
 930         __be32 *p;
 931         struct rpc_auth *auth = req->rq_cred->cr_auth;
 932
 933         /* initialize running count of expected bytes in reply.
 934          * NOTE: the replied tag SHOULD be the same is the one sent,
 935          * but this is not required as a MUST for the server to do so. */
 936         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
 937
 938         BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
 939         encode_string(xdr, hdr->taglen, hdr->tag);
 940         p = reserve_space(xdr, 8);
 941         *p++ = cpu_to_be32(hdr->minorversion);
 942         hdr->nops_p = p;
 943         *p = cpu_to_be32(hdr->nops);
 944 }
 945
 946 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
 947                 uint32_t replen,
 948                 struct compound_hdr *hdr)
 949 {
 950         encode_uint32(xdr, op);
 951         hdr->nops++;
 952         hdr->replen += replen;
 953 }
 954
 955 static void encode_nops(struct compound_hdr *hdr)
 956 {
 957         BUG_ON(hdr->nops > NFS4_MAX_OPS);
 958         *hdr->nops_p = htonl(hdr->nops);
 959 }
 960
 961 static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
 962 {
 963         encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
 964 }
 965
 966 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 967 {
 968         encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
 969 }
 970
 971 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
 972 {
 973         char owner_name[IDMAP_NAMESZ];
 974         char owner_group[IDMAP_NAMESZ];
 975         int owner_namelen = 0;
 976         int owner_grouplen = 0;
 977         __be32 *p;
 978         __be32 *q;
 979         int len;
 980         uint32_t bmval0 = 0;
 981         uint32_t bmval1 = 0;
 982
 983         /*
 984          * We reserve enough space to write the entire attribute buffer at once.
 985          * In the worst-case, this would be
 986          *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
 987          *          = 36 bytes, plus any contribution from variable-length fields
 988          *            such as owner/group.
 989          */
 990         len = 16;
 991
 992         /* Sigh */
 993         if (iap->ia_valid & ATTR_SIZE)
 994                 len += 8;
 995         if (iap->ia_valid & ATTR_MODE)
 996                 len += 4;
 997         if (iap->ia_valid & ATTR_UID) {
 998                 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
 999                 if (owner_namelen < 0) {
1000                         dprintk("nfs: couldn't resolve uid %d to string\n",
1001                                         iap->ia_uid);
1002                         /* XXX */
1003                         strcpy(owner_name, "nobody");
1004                         owner_namelen = sizeof("nobody") - 1;
1005                         /* goto out; */
1006                 }
1007                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1008         }
1009         if (iap->ia_valid & ATTR_GID) {
1010                 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1011                 if (owner_grouplen < 0) {
1012                         dprintk("nfs: couldn't resolve gid %d to string\n",
1013                                         iap->ia_gid);
1014                         strcpy(owner_group, "nobody");
1015                         owner_grouplen = sizeof("nobody") - 1;
1016                         /* goto out; */
1017                 }
1018                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1019         }
1020         if (iap->ia_valid & ATTR_ATIME_SET)
1021                 len += 16;
1022         else if (iap->ia_valid & ATTR_ATIME)
1023                 len += 4;
1024         if (iap->ia_valid & ATTR_MTIME_SET)
1025                 len += 16;
1026         else if (iap->ia_valid & ATTR_MTIME)
1027                 len += 4;
1028         p = reserve_space(xdr, len);
1029
1030         /*
1031          * We write the bitmap length now, but leave the bitmap and the attribute
1032          * buffer length to be backfilled at the end of this routine.
1033          */
1034         *p++ = cpu_to_be32(2);
1035         q = p;
1036         p += 3;
1037
1038         if (iap->ia_valid & ATTR_SIZE) {
1039                 bmval0 |= FATTR4_WORD0_SIZE;
1040                 p = xdr_encode_hyper(p, iap->ia_size);
1041         }
1042         if (iap->ia_valid & ATTR_MODE) {
1043                 bmval1 |= FATTR4_WORD1_MODE;
1044                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1045         }
1046         if (iap->ia_valid & ATTR_UID) {
1047                 bmval1 |= FATTR4_WORD1_OWNER;
1048                 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1049         }
1050         if (iap->ia_valid & ATTR_GID) {
1051                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
1052                 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1053         }
1054         if (iap->ia_valid & ATTR_ATIME_SET) {
1055                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
1056                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1057                 *p++ = cpu_to_be32(0);
1058                 *p++ = cpu_to_be32(iap->ia_atime.tv_sec);
1059                 *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
1060         }
1061         else if (iap->ia_valid & ATTR_ATIME) {
1062                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
1063                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1064         }
1065         if (iap->ia_valid & ATTR_MTIME_SET) {
1066                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
1067                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1068                 *p++ = cpu_to_be32(0);
1069                 *p++ = cpu_to_be32(iap->ia_mtime.tv_sec);
1070                 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1071         }
1072         else if (iap->ia_valid & ATTR_MTIME) {
1073                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
1074                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1075         }
1076
1077         /*
1078          * Now we backfill the bitmap and the attribute buffer length.
1079          */
1080         if (len != ((char *)p - (char *)q) + 4) {
1081                 printk(KERN_ERR "NFS: Attr length error, %u != %Zu\n",
1082                                 len, ((char *)p - (char *)q) + 4);
1083                 BUG();
1084         }
1085         len = (char *)p - (char *)q - 12;
1086         *q++ = htonl(bmval0);
1087         *q++ = htonl(bmval1);
1088         *q = htonl(len);
1089
1090 /* out: */
1091 }
1092
1093 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1094 {
1095         encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1096         encode_uint32(xdr, access);
1097 }
1098
1099 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1100 {
1101         encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1102         encode_nfs4_seqid(xdr, arg->seqid);
1103         encode_nfs4_stateid(xdr, arg->stateid);
1104 }
1105
1106 static void encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1107 {
1108         __be32 *p;
1109
1110         encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1111         p = reserve_space(xdr, 12);
1112         p = xdr_encode_hyper(p, args->offset);
1113         *p = cpu_to_be32(args->count);
1114 }
1115
1116 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1117 {
1118         __be32 *p;
1119
1120         encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1121         encode_uint32(xdr, create->ftype);
1122
1123         switch (create->ftype) {
1124         case NF4LNK:
1125                 p = reserve_space(xdr, 4);
1126                 *p = cpu_to_be32(create->u.symlink.len);
1127                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
1128                 break;
1129
1130         case NF4BLK: case NF4CHR:
1131                 p = reserve_space(xdr, 8);
1132                 *p++ = cpu_to_be32(create->u.device.specdata1);
1133                 *p = cpu_to_be32(create->u.device.specdata2);
1134                 break;
1135
1136         default:
1137                 break;
1138         }
1139
1140         encode_string(xdr, create->name->len, create->name->name);
1141         encode_attrs(xdr, create->attrs, create->server);
1142 }
1143
1144 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1145 {
1146         __be32 *p;
1147
1148         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1149         p = reserve_space(xdr, 8);
1150         *p++ = cpu_to_be32(1);
1151         *p = cpu_to_be32(bitmap);
1152 }
1153
1154 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1155 {
1156         __be32 *p;
1157
1158         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1159         p = reserve_space(xdr, 12);
1160         *p++ = cpu_to_be32(2);
1161         *p++ = cpu_to_be32(bm0);
1162         *p = cpu_to_be32(bm1);
1163 }
1164
1165 static void
1166 encode_getattr_three(struct xdr_stream *xdr,
1167                      uint32_t bm0, uint32_t bm1, uint32_t bm2,
1168                      struct compound_hdr *hdr)
1169 {
1170         __be32 *p;
1171
1172         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1173         if (bm2) {
1174                 p = reserve_space(xdr, 16);
1175                 *p++ = cpu_to_be32(3);
1176                 *p++ = cpu_to_be32(bm0);
1177                 *p++ = cpu_to_be32(bm1);
1178                 *p = cpu_to_be32(bm2);
1179         } else if (bm1) {
1180                 p = reserve_space(xdr, 12);
1181                 *p++ = cpu_to_be32(2);
1182                 *p++ = cpu_to_be32(bm0);
1183                 *p = cpu_to_be32(bm1);
1184         } else {
1185                 p = reserve_space(xdr, 8);
1186                 *p++ = cpu_to_be32(1);
1187                 *p = cpu_to_be32(bm0);
1188         }
1189 }
1190
1191 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1192 {
1193         encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1194                            bitmask[1] & nfs4_fattr_bitmap[1], hdr);
1195 }
1196
1197 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1198 {
1199         encode_getattr_three(xdr,
1200                              bitmask[0] & nfs4_fsinfo_bitmap[0],
1201                              bitmask[1] & nfs4_fsinfo_bitmap[1],
1202                              bitmask[2] & nfs4_fsinfo_bitmap[2],
1203                              hdr);
1204 }
1205
1206 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1207 {
1208         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1209                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1210 }
1211
1212 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1213 {
1214         encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1215 }
1216
1217 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1218 {
1219         encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1220         encode_string(xdr, name->len, name->name);
1221 }
1222
1223 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1224 {
1225         if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
1226                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1227         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1228 }
1229
1230 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1231 {
1232         if (fl->fl_end == OFFSET_MAX)
1233                 return ~(uint64_t)0;
1234         return fl->fl_end - fl->fl_start + 1;
1235 }
1236
1237 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1238 {
1239         __be32 *p;
1240
1241         p = reserve_space(xdr, 32);
1242         p = xdr_encode_hyper(p, lowner->clientid);
1243         *p++ = cpu_to_be32(20);
1244         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1245         *p++ = cpu_to_be32(lowner->s_dev);
1246         xdr_encode_hyper(p, lowner->id);
1247 }
1248
1249 /*
1250  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1251  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1252  */
1253 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1254 {
1255         __be32 *p;
1256
1257         encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1258         p = reserve_space(xdr, 28);
1259         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1260         *p++ = cpu_to_be32(args->reclaim);
1261         p = xdr_encode_hyper(p, args->fl->fl_start);
1262         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1263         *p = cpu_to_be32(args->new_lock_owner);
1264         if (args->new_lock_owner){
1265                 encode_nfs4_seqid(xdr, args->open_seqid);
1266                 encode_nfs4_stateid(xdr, args->open_stateid);
1267                 encode_nfs4_seqid(xdr, args->lock_seqid);
1268                 encode_lockowner(xdr, &args->lock_owner);
1269         }
1270         else {
1271                 encode_nfs4_stateid(xdr, args->lock_stateid);
1272                 encode_nfs4_seqid(xdr, args->lock_seqid);
1273         }
1274 }
1275
1276 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1277 {
1278         __be32 *p;
1279
1280         encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1281         p = reserve_space(xdr, 20);
1282         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1283         p = xdr_encode_hyper(p, args->fl->fl_start);
1284         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1285         encode_lockowner(xdr, &args->lock_owner);
1286 }
1287
1288 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1289 {
1290         __be32 *p;
1291
1292         encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1293         encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1294         encode_nfs4_seqid(xdr, args->seqid);
1295         encode_nfs4_stateid(xdr, args->stateid);
1296         p = reserve_space(xdr, 16);
1297         p = xdr_encode_hyper(p, args->fl->fl_start);
1298         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1299 }
1300
1301 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1302 {
1303         encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1304         encode_lockowner(xdr, lowner);
1305 }
1306
1307 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1308 {
1309         encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1310         encode_string(xdr, name->len, name->name);
1311 }
1312
1313 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1314 {
1315         __be32 *p;
1316
1317         p = reserve_space(xdr, 8);
1318         switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1319         case FMODE_READ:
1320                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1321                 break;
1322         case FMODE_WRITE:
1323                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1324                 break;
1325         case FMODE_READ|FMODE_WRITE:
1326                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1327                 break;
1328         default:
1329                 *p++ = cpu_to_be32(0);
1330         }
1331         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1332 }
1333
1334 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1335 {
1336         __be32 *p;
1337  /*
1338  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1339  * owner 4 = 32
1340  */
1341         encode_nfs4_seqid(xdr, arg->seqid);
1342         encode_share_access(xdr, arg->fmode);
1343         p = reserve_space(xdr, 32);
1344         p = xdr_encode_hyper(p, arg->clientid);
1345         *p++ = cpu_to_be32(20);
1346         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1347         *p++ = cpu_to_be32(arg->server->s_dev);
1348         xdr_encode_hyper(p, arg->id);
1349 }
1350
1351 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1352 {
1353         __be32 *p;
1354         struct nfs_client *clp;
1355
1356         p = reserve_space(xdr, 4);
1357         switch(arg->open_flags & O_EXCL) {
1358         case 0:
1359                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1360                 encode_attrs(xdr, arg->u.attrs, arg->server);
1361                 break;
1362         default:
1363                 clp = arg->server->nfs_client;
1364                 if (clp->cl_mvops->minor_version > 0) {
1365                         if (nfs4_has_persistent_session(clp)) {
1366                                 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1367                                 encode_attrs(xdr, arg->u.attrs, arg->server);
1368                         } else {
1369                                 struct iattr dummy;
1370
1371                                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1372                                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1373                                 dummy.ia_valid = 0;
1374                                 encode_attrs(xdr, &dummy, arg->server);
1375                         }
1376                 } else {
1377                         *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1378                         encode_nfs4_verifier(xdr, &arg->u.verifier);
1379                 }
1380         }
1381 }
1382
1383 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1384 {
1385         __be32 *p;
1386
1387         p = reserve_space(xdr, 4);
1388         switch (arg->open_flags & O_CREAT) {
1389         case 0:
1390                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1391                 break;
1392         default:
1393                 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1394                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1395                 encode_createmode(xdr, arg);
1396         }
1397 }
1398
1399 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1400 {
1401         __be32 *p;
1402
1403         p = reserve_space(xdr, 4);
1404         switch (delegation_type) {
1405         case 0:
1406                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1407                 break;
1408         case FMODE_READ:
1409                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1410                 break;
1411         case FMODE_WRITE|FMODE_READ:
1412                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1413                 break;
1414         default:
1415                 BUG();
1416         }
1417 }
1418
1419 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1420 {
1421         __be32 *p;
1422
1423         p = reserve_space(xdr, 4);
1424         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1425         encode_string(xdr, name->len, name->name);
1426 }
1427
1428 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1429 {
1430         __be32 *p;
1431
1432         p = reserve_space(xdr, 4);
1433         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1434         encode_delegation_type(xdr, type);
1435 }
1436
1437 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1438 {
1439         __be32 *p;
1440
1441         p = reserve_space(xdr, 4);
1442         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1443         encode_nfs4_stateid(xdr, stateid);
1444         encode_string(xdr, name->len, name->name);
1445 }
1446
1447 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1448 {
1449         encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1450         encode_openhdr(xdr, arg);
1451         encode_opentype(xdr, arg);
1452         switch (arg->claim) {
1453         case NFS4_OPEN_CLAIM_NULL:
1454                 encode_claim_null(xdr, arg->name);
1455                 break;
1456         case NFS4_OPEN_CLAIM_PREVIOUS:
1457                 encode_claim_previous(xdr, arg->u.delegation_type);
1458                 break;
1459         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1460                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1461                 break;
1462         default:
1463                 BUG();
1464         }
1465 }
1466
1467 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1468 {
1469         encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1470         encode_nfs4_stateid(xdr, arg->stateid);
1471         encode_nfs4_seqid(xdr, arg->seqid);
1472 }
1473
1474 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1475 {
1476         encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1477         encode_nfs4_stateid(xdr, arg->stateid);
1478         encode_nfs4_seqid(xdr, arg->seqid);
1479         encode_share_access(xdr, arg->fmode);
1480 }
1481
1482 static void
1483 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1484 {
1485         encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1486         encode_string(xdr, fh->size, fh->data);
1487 }
1488
1489 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1490 {
1491         encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1492 }
1493
1494 static void encode_open_stateid(struct xdr_stream *xdr,
1495                 const struct nfs_open_context *ctx,
1496                 const struct nfs_lock_context *l_ctx,
1497                 fmode_t fmode,
1498                 int zero_seqid)
1499 {
1500         nfs4_stateid stateid;
1501
1502         if (ctx->state != NULL) {
1503                 nfs4_select_rw_stateid(&stateid, ctx->state,
1504                                 fmode, l_ctx->lockowner, l_ctx->pid);
1505                 if (zero_seqid)
1506                         stateid.seqid = 0;
1507                 encode_nfs4_stateid(xdr, &stateid);
1508         } else
1509                 encode_nfs4_stateid(xdr, &zero_stateid);
1510 }
1511
1512 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1513 {
1514         __be32 *p;
1515
1516         encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1517         encode_open_stateid(xdr, args->context, args->lock_context,
1518                         FMODE_READ, hdr->minorversion);
1519
1520         p = reserve_space(xdr, 12);
1521         p = xdr_encode_hyper(p, args->offset);
1522         *p = cpu_to_be32(args->count);
1523 }
1524
1525 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1526 {
1527         uint32_t attrs[2] = {
1528                 FATTR4_WORD0_RDATTR_ERROR,
1529                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1530         };
1531         uint32_t dircount = readdir->count >> 1;
1532         __be32 *p, verf[2];
1533
1534         if (readdir->plus) {
1535                 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1536                         FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1537                 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1538                         FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1539                         FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1540                         FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1541                 dircount >>= 1;
1542         }
1543         /* Use mounted_on_fileid only if the server supports it */
1544         if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1545                 attrs[0] |= FATTR4_WORD0_FILEID;
1546
1547         encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1548         encode_uint64(xdr, readdir->cookie);
1549         encode_nfs4_verifier(xdr, &readdir->verifier);
1550         p = reserve_space(xdr, 20);
1551         *p++ = cpu_to_be32(dircount);
1552         *p++ = cpu_to_be32(readdir->count);
1553         *p++ = cpu_to_be32(2);
1554
1555         *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1556         *p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1557         memcpy(verf, readdir->verifier.data, sizeof(verf));
1558         dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1559                         __func__,
1560                         (unsigned long long)readdir->cookie,
1561                         verf[0], verf[1],
1562                         attrs[0] & readdir->bitmask[0],
1563                         attrs[1] & readdir->bitmask[1]);
1564 }
1565
1566 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1567 {
1568         encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1569 }
1570
1571 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1572 {
1573         encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1574         encode_string(xdr, name->len, name->name);
1575 }
1576
1577 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1578 {
1579         encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1580         encode_string(xdr, oldname->len, oldname->name);
1581         encode_string(xdr, newname->len, newname->name);
1582 }
1583
1584 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1585                          struct compound_hdr *hdr)
1586 {
1587         encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1588         encode_uint64(xdr, clid);
1589 }
1590
1591 static void
1592 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1593 {
1594         encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1595 }
1596
1597 static void
1598 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1599 {
1600         __be32 *p;
1601
1602         encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1603         encode_nfs4_stateid(xdr, &zero_stateid);
1604         p = reserve_space(xdr, 2*4);
1605         *p++ = cpu_to_be32(1);
1606         *p = cpu_to_be32(FATTR4_WORD0_ACL);
1607         BUG_ON(arg->acl_len % 4);
1608         p = reserve_space(xdr, 4);
1609         *p = cpu_to_be32(arg->acl_len);
1610         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1611 }
1612
1613 static void
1614 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1615 {
1616         encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1617 }
1618
1619 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1620 {
1621         encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1622         encode_nfs4_stateid(xdr, &arg->stateid);
1623         encode_attrs(xdr, arg->iap, server);
1624 }
1625
1626 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1627 {
1628         __be32 *p;
1629
1630         encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1631         encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1632
1633         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1634         p = reserve_space(xdr, 4);
1635         *p = cpu_to_be32(setclientid->sc_prog);
1636         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1637         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1638         p = reserve_space(xdr, 4);
1639         *p = cpu_to_be32(setclientid->sc_cb_ident);
1640 }
1641
1642 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1643 {
1644         encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1645                         decode_setclientid_confirm_maxsz, hdr);
1646         encode_uint64(xdr, arg->clientid);
1647         encode_nfs4_verifier(xdr, &arg->confirm);
1648 }
1649
1650 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1651 {
1652         __be32 *p;
1653
1654         encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1655         encode_open_stateid(xdr, args->context, args->lock_context,
1656                         FMODE_WRITE, hdr->minorversion);
1657
1658         p = reserve_space(xdr, 16);
1659         p = xdr_encode_hyper(p, args->offset);
1660         *p++ = cpu_to_be32(args->stable);
1661         *p = cpu_to_be32(args->count);
1662
1663         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1664 }
1665
1666 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1667 {
1668         encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1669         encode_nfs4_stateid(xdr, stateid);
1670 }
1671
1672 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1673 {
1674         encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1675         encode_string(xdr, name->len, name->name);
1676 }
1677
1678 #if defined(CONFIG_NFS_V4_1)
1679 /* NFSv4.1 operations */
1680 static void encode_exchange_id(struct xdr_stream *xdr,
1681                                struct nfs41_exchange_id_args *args,
1682                                struct compound_hdr *hdr)
1683 {
1684         __be32 *p;
1685         char impl_name[NFS4_OPAQUE_LIMIT];
1686         int len = 0;
1687
1688         encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1689         encode_nfs4_verifier(xdr, args->verifier);
1690
1691         encode_string(xdr, args->id_len, args->id);
1692
1693         p = reserve_space(xdr, 12);
1694         *p++ = cpu_to_be32(args->flags);
1695         *p++ = cpu_to_be32(0);  /* zero length state_protect4_a */
1696
1697         if (send_implementation_id &&
1698             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1699             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1700                 <= NFS4_OPAQUE_LIMIT + 1)
1701                 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1702                                utsname()->sysname, utsname()->release,
1703                                utsname()->version, utsname()->machine);
1704
1705         if (len > 0) {
1706                 *p = cpu_to_be32(1);    /* implementation id array length=1 */
1707
1708                 encode_string(xdr,
1709                         sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1710                         CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1711                 encode_string(xdr, len, impl_name);
1712                 /* just send zeros for nii_date - the date is in nii_name */
1713                 p = reserve_space(xdr, 12);
1714                 p = xdr_encode_hyper(p, 0);
1715                 *p = cpu_to_be32(0);
1716         } else
1717                 *p = cpu_to_be32(0);    /* implementation id array length=0 */
1718 }
1719
1720 static void encode_create_session(struct xdr_stream *xdr,
1721                                   struct nfs41_create_session_args *args,
1722                                   struct compound_hdr *hdr)
1723 {
1724         __be32 *p;
1725         char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1726         uint32_t len;
1727         struct nfs_client *clp = args->client;
1728         u32 max_resp_sz_cached;
1729
1730         /*
1731          * Assumes OPEN is the biggest non-idempotent compound.
1732          * 2 is the verifier.
1733          */
1734         max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1735                               RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1736
1737         len = scnprintf(machine_name, sizeof(machine_name), "%s",
1738                         clp->cl_ipaddr);
1739
1740         encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1741         p = reserve_space(xdr, 16 + 2*28 + 20 + len + 12);
1742         p = xdr_encode_hyper(p, clp->cl_clientid);
1743         *p++ = cpu_to_be32(clp->cl_seqid);                      /*Sequence id */
1744         *p++ = cpu_to_be32(args->flags);                        /*flags */
1745
1746         /* Fore Channel */
1747         *p++ = cpu_to_be32(0);                          /* header padding size */
1748         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1749         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1750         *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1751         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1752         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1753         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1754
1755         /* Back Channel */
1756         *p++ = cpu_to_be32(0);                          /* header padding size */
1757         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1758         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1759         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1760         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1761         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1762         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1763
1764         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1765         *p++ = cpu_to_be32(1);
1766         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1767
1768         /* authsys_parms rfc1831 */
1769         *p++ = cpu_to_be32((u32)clp->cl_boot_time.tv_nsec);     /* stamp */
1770         p = xdr_encode_opaque(p, machine_name, len);
1771         *p++ = cpu_to_be32(0);                          /* UID */
1772         *p++ = cpu_to_be32(0);                          /* GID */
1773         *p = cpu_to_be32(0);                            /* No more gids */
1774 }
1775
1776 static void encode_destroy_session(struct xdr_stream *xdr,
1777                                    struct nfs4_session *session,
1778                                    struct compound_hdr *hdr)
1779 {
1780         encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1781         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1782 }
1783
1784 static void encode_reclaim_complete(struct xdr_stream *xdr,
1785                                     struct nfs41_reclaim_complete_args *args,
1786                                     struct compound_hdr *hdr)
1787 {
1788         encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1789         encode_uint32(xdr, args->one_fs);
1790 }
1791 #endif /* CONFIG_NFS_V4_1 */
1792
1793 static void encode_sequence(struct xdr_stream *xdr,
1794                             const struct nfs4_sequence_args *args,
1795                             struct compound_hdr *hdr)
1796 {
1797 #if defined(CONFIG_NFS_V4_1)
1798         struct nfs4_session *session = args->sa_session;
1799         struct nfs4_slot_table *tp;
1800         struct nfs4_slot *slot;
1801         __be32 *p;
1802
1803         if (!session)
1804                 return;
1805
1806         tp = &session->fc_slot_table;
1807
1808         WARN_ON(args->sa_slotid == NFS4_MAX_SLOT_TABLE);
1809         slot = tp->slots + args->sa_slotid;
1810
1811         encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1812
1813         /*
1814          * Sessionid + seqid + slotid + max slotid + cache_this
1815          */
1816         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1817                 "max_slotid=%d cache_this=%d\n",
1818                 __func__,
1819                 ((u32 *)session->sess_id.data)[0],
1820                 ((u32 *)session->sess_id.data)[1],
1821                 ((u32 *)session->sess_id.data)[2],
1822                 ((u32 *)session->sess_id.data)[3],
1823                 slot->seq_nr, args->sa_slotid,
1824                 tp->highest_used_slotid, args->sa_cache_this);
1825         p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1826         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1827         *p++ = cpu_to_be32(slot->seq_nr);
1828         *p++ = cpu_to_be32(args->sa_slotid);
1829         *p++ = cpu_to_be32(tp->highest_used_slotid);
1830         *p = cpu_to_be32(args->sa_cache_this);
1831 #endif /* CONFIG_NFS_V4_1 */
1832 }
1833
1834 #ifdef CONFIG_NFS_V4_1
1835 static void
1836 encode_getdevicelist(struct xdr_stream *xdr,
1837                      const struct nfs4_getdevicelist_args *args,
1838                      struct compound_hdr *hdr)
1839 {
1840         __be32 *p;
1841         nfs4_verifier dummy = {
1842                 .data = "dummmmmy",
1843         };
1844
1845         encode_op_hdr(xdr, OP_GETDEVICELIST, decode_getdevicelist_maxsz, hdr);
1846         p = reserve_space(xdr, 16);
1847         *p++ = cpu_to_be32(args->layoutclass);
1848         *p++ = cpu_to_be32(NFS4_PNFS_GETDEVLIST_MAXNUM);
1849         xdr_encode_hyper(p, 0ULL);                          /* cookie */
1850         encode_nfs4_verifier(xdr, &dummy);
1851 }
1852
1853 static void
1854 encode_getdeviceinfo(struct xdr_stream *xdr,
1855                      const struct nfs4_getdeviceinfo_args *args,
1856                      struct compound_hdr *hdr)
1857 {
1858         __be32 *p;
1859
1860         encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1861         p = reserve_space(xdr, 12 + NFS4_DEVICEID4_SIZE);
1862         p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1863                                     NFS4_DEVICEID4_SIZE);
1864         *p++ = cpu_to_be32(args->pdev->layout_type);
1865         *p++ = cpu_to_be32(args->pdev->pglen);          /* gdia_maxcount */
1866         *p++ = cpu_to_be32(0);                          /* bitmap length 0 */
1867 }
1868
1869 static void
1870 encode_layoutget(struct xdr_stream *xdr,
1871                       const struct nfs4_layoutget_args *args,
1872                       struct compound_hdr *hdr)
1873 {
1874         __be32 *p;
1875
1876         encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1877         p = reserve_space(xdr, 36);
1878         *p++ = cpu_to_be32(0);     /* Signal layout available */
1879         *p++ = cpu_to_be32(args->type);
1880         *p++ = cpu_to_be32(args->range.iomode);
1881         p = xdr_encode_hyper(p, args->range.offset);
1882         p = xdr_encode_hyper(p, args->range.length);
1883         p = xdr_encode_hyper(p, args->minlength);
1884         encode_nfs4_stateid(xdr, &args->stateid);
1885         encode_uint32(xdr, args->maxcount);
1886
1887         dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1888                 __func__,
1889                 args->type,
1890                 args->range.iomode,
1891                 (unsigned long)args->range.offset,
1892                 (unsigned long)args->range.length,
1893                 args->maxcount);
1894 }
1895
1896 static int
1897 encode_layoutcommit(struct xdr_stream *xdr,
1898                     struct inode *inode,
1899                     const struct nfs4_layoutcommit_args *args,
1900                     struct compound_hdr *hdr)
1901 {
1902         __be32 *p;
1903
1904         dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1905                 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1906
1907         encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
1908         p = reserve_space(xdr, 20);
1909         /* Only whole file layouts */
1910         p = xdr_encode_hyper(p, 0); /* offset */
1911         p = xdr_encode_hyper(p, args->lastbytewritten + 1);     /* length */
1912         *p = cpu_to_be32(0); /* reclaim */
1913         encode_nfs4_stateid(xdr, &args->stateid);
1914         p = reserve_space(xdr, 20);
1915         *p++ = cpu_to_be32(1); /* newoffset = TRUE */
1916         p = xdr_encode_hyper(p, args->lastbytewritten);
1917         *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
1918         *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
1919
1920         if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit)
1921                 NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
1922                         NFS_I(inode)->layout, xdr, args);
1923         else
1924                 encode_uint32(xdr, 0); /* no layout-type payload */
1925
1926         return 0;
1927 }
1928
1929 static void
1930 encode_layoutreturn(struct xdr_stream *xdr,
1931                     const struct nfs4_layoutreturn_args *args,
1932                     struct compound_hdr *hdr)
1933 {
1934         __be32 *p;
1935
1936         encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
1937         p = reserve_space(xdr, 16);
1938         *p++ = cpu_to_be32(0);          /* reclaim. always 0 for now */
1939         *p++ = cpu_to_be32(args->layout_type);
1940         *p++ = cpu_to_be32(IOMODE_ANY);
1941         *p = cpu_to_be32(RETURN_FILE);
1942         p = reserve_space(xdr, 16);
1943         p = xdr_encode_hyper(p, 0);
1944         p = xdr_encode_hyper(p, NFS4_MAX_UINT64);
1945         spin_lock(&args->inode->i_lock);
1946         encode_nfs4_stateid(xdr, &args->stateid);
1947         spin_unlock(&args->inode->i_lock);
1948         if (NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn) {
1949                 NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn(
1950                         NFS_I(args->inode)->layout, xdr, args);
1951         } else
1952                 encode_uint32(xdr, 0);
1953 }
1954
1955 static int
1956 encode_secinfo_no_name(struct xdr_stream *xdr,
1957                        const struct nfs41_secinfo_no_name_args *args,
1958                        struct compound_hdr *hdr)
1959 {
1960         encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
1961         encode_uint32(xdr, args->style);
1962         return 0;
1963 }
1964
1965 static void encode_test_stateid(struct xdr_stream *xdr,
1966                                 struct nfs41_test_stateid_args *args,
1967                                 struct compound_hdr *hdr)
1968 {
1969         encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
1970         encode_uint32(xdr, 1);
1971         encode_nfs4_stateid(xdr, args->stateid);
1972 }
1973
1974 static void encode_free_stateid(struct xdr_stream *xdr,
1975                                 struct nfs41_free_stateid_args *args,
1976                                 struct compound_hdr *hdr)
1977 {
1978         encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
1979         encode_nfs4_stateid(xdr, args->stateid);
1980 }
1981 #endif /* CONFIG_NFS_V4_1 */
1982
1983 /*
1984  * END OF "GENERIC" ENCODE ROUTINES.
1985  */
1986
1987 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
1988 {
1989 #if defined(CONFIG_NFS_V4_1)
1990         if (args->sa_session)
1991                 return args->sa_session->clp->cl_mvops->minor_version;
1992 #endif /* CONFIG_NFS_V4_1 */
1993         return 0;
1994 }
1995
1996 /*
1997  * Encode an ACCESS request
1998  */
1999 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2000                                 const struct nfs4_accessargs *args)
2001 {
2002         struct compound_hdr hdr = {
2003                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2004         };
2005
2006         encode_compound_hdr(xdr, req, &hdr);
2007         encode_sequence(xdr, &args->seq_args, &hdr);
2008         encode_putfh(xdr, args->fh, &hdr);
2009         encode_access(xdr, args->access, &hdr);
2010         encode_getfattr(xdr, args->bitmask, &hdr);
2011         encode_nops(&hdr);
2012 }
2013
2014 /*
2015  * Encode LOOKUP request
2016  */
2017 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2018                                 const struct nfs4_lookup_arg *args)
2019 {
2020         struct compound_hdr hdr = {
2021                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2022         };
2023
2024         encode_compound_hdr(xdr, req, &hdr);
2025         encode_sequence(xdr, &args->seq_args, &hdr);
2026         encode_putfh(xdr, args->dir_fh, &hdr);
2027         encode_lookup(xdr, args->name, &hdr);
2028         encode_getfh(xdr, &hdr);
2029         encode_getfattr(xdr, args->bitmask, &hdr);
2030         encode_nops(&hdr);
2031 }
2032
2033 /*
2034  * Encode LOOKUP_ROOT request
2035  */
2036 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2037                                      struct xdr_stream *xdr,
2038                                      const struct nfs4_lookup_root_arg *args)
2039 {
2040         struct compound_hdr hdr = {
2041                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2042         };
2043
2044         encode_compound_hdr(xdr, req, &hdr);
2045         encode_sequence(xdr, &args->seq_args, &hdr);
2046         encode_putrootfh(xdr, &hdr);
2047         encode_getfh(xdr, &hdr);
2048         encode_getfattr(xdr, args->bitmask, &hdr);
2049         encode_nops(&hdr);
2050 }
2051
2052 /*
2053  * Encode REMOVE request
2054  */
2055 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2056                                 const struct nfs_removeargs *args)
2057 {
2058         struct compound_hdr hdr = {
2059                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2060         };
2061
2062         encode_compound_hdr(xdr, req, &hdr);
2063         encode_sequence(xdr, &args->seq_args, &hdr);
2064         encode_putfh(xdr, args->fh, &hdr);
2065         encode_remove(xdr, &args->name, &hdr);
2066         encode_getfattr(xdr, args->bitmask, &hdr);
2067         encode_nops(&hdr);
2068 }
2069
2070 /*
2071  * Encode RENAME request
2072  */
2073 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2074                                 const struct nfs_renameargs *args)
2075 {
2076         struct compound_hdr hdr = {
2077                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2078         };
2079
2080         encode_compound_hdr(xdr, req, &hdr);
2081         encode_sequence(xdr, &args->seq_args, &hdr);
2082         encode_putfh(xdr, args->old_dir, &hdr);
2083         encode_savefh(xdr, &hdr);
2084         encode_putfh(xdr, args->new_dir, &hdr);
2085         encode_rename(xdr, args->old_name, args->new_name, &hdr);
2086         encode_getfattr(xdr, args->bitmask, &hdr);
2087         encode_restorefh(xdr, &hdr);
2088         encode_getfattr(xdr, args->bitmask, &hdr);
2089         encode_nops(&hdr);
2090 }
2091
2092 /*
2093  * Encode LINK request
2094  */
2095 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2096                              const struct nfs4_link_arg *args)
2097 {
2098         struct compound_hdr hdr = {
2099                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2100         };
2101
2102         encode_compound_hdr(xdr, req, &hdr);
2103         encode_sequence(xdr, &args->seq_args, &hdr);
2104         encode_putfh(xdr, args->fh, &hdr);
2105         encode_savefh(xdr, &hdr);
2106         encode_putfh(xdr, args->dir_fh, &hdr);
2107         encode_link(xdr, args->name, &hdr);
2108         encode_getfattr(xdr, args->bitmask, &hdr);
2109         encode_restorefh(xdr, &hdr);
2110         encode_getfattr(xdr, args->bitmask, &hdr);
2111         encode_nops(&hdr);
2112 }
2113
2114 /*
2115  * Encode CREATE request
2116  */
2117 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2118                                 const struct nfs4_create_arg *args)
2119 {
2120         struct compound_hdr hdr = {
2121                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2122         };
2123
2124         encode_compound_hdr(xdr, req, &hdr);
2125         encode_sequence(xdr, &args->seq_args, &hdr);
2126         encode_putfh(xdr, args->dir_fh, &hdr);
2127         encode_savefh(xdr, &hdr);
2128         encode_create(xdr, args, &hdr);
2129         encode_getfh(xdr, &hdr);
2130         encode_getfattr(xdr, args->bitmask, &hdr);
2131         encode_restorefh(xdr, &hdr);
2132         encode_getfattr(xdr, args->bitmask, &hdr);
2133         encode_nops(&hdr);
2134 }
2135
2136 /*
2137  * Encode SYMLINK request
2138  */
2139 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2140                                  const struct nfs4_create_arg *args)
2141 {
2142         nfs4_xdr_enc_create(req, xdr, args);
2143 }
2144
2145 /*
2146  * Encode GETATTR request
2147  */
2148 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2149                                  const struct nfs4_getattr_arg *args)
2150 {
2151         struct compound_hdr hdr = {
2152                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2153         };
2154
2155         encode_compound_hdr(xdr, req, &hdr);
2156         encode_sequence(xdr, &args->seq_args, &hdr);
2157         encode_putfh(xdr, args->fh, &hdr);
2158         encode_getfattr(xdr, args->bitmask, &hdr);
2159         encode_nops(&hdr);
2160 }
2161
2162 /*
2163  * Encode a CLOSE request
2164  */
2165 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2166                                struct nfs_closeargs *args)
2167 {
2168         struct compound_hdr hdr = {
2169                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2170         };
2171
2172         encode_compound_hdr(xdr, req, &hdr);
2173         encode_sequence(xdr, &args->seq_args, &hdr);
2174         encode_putfh(xdr, args->fh, &hdr);
2175         encode_close(xdr, args, &hdr);
2176         encode_getfattr(xdr, args->bitmask, &hdr);
2177         encode_nops(&hdr);
2178 }
2179
2180 /*
2181  * Encode an OPEN request
2182  */
2183 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2184                               struct nfs_openargs *args)
2185 {
2186         struct compound_hdr hdr = {
2187                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2188         };
2189
2190         encode_compound_hdr(xdr, req, &hdr);
2191         encode_sequence(xdr, &args->seq_args, &hdr);
2192         encode_putfh(xdr, args->fh, &hdr);
2193         encode_savefh(xdr, &hdr);
2194         encode_open(xdr, args, &hdr);
2195         encode_getfh(xdr, &hdr);
2196         encode_getfattr(xdr, args->bitmask, &hdr);
2197         encode_restorefh(xdr, &hdr);
2198         encode_getfattr(xdr, args->dir_bitmask, &hdr);
2199         encode_nops(&hdr);
2200 }
2201
2202 /*
2203  * Encode an OPEN_CONFIRM request
2204  */
2205 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2206                                       struct xdr_stream *xdr,
2207                                       struct nfs_open_confirmargs *args)
2208 {
2209         struct compound_hdr hdr = {
2210                 .nops   = 0,
2211         };
2212
2213         encode_compound_hdr(xdr, req, &hdr);
2214         encode_putfh(xdr, args->fh, &hdr);
2215         encode_open_confirm(xdr, args, &hdr);
2216         encode_nops(&hdr);
2217 }
2218
2219 /*
2220  * Encode an OPEN request with no attributes.
2221  */
2222 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2223                                      struct xdr_stream *xdr,
2224                                      struct nfs_openargs *args)
2225 {
2226         struct compound_hdr hdr = {
2227                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2228         };
2229
2230         encode_compound_hdr(xdr, req, &hdr);
2231         encode_sequence(xdr, &args->seq_args, &hdr);
2232         encode_putfh(xdr, args->fh, &hdr);
2233         encode_open(xdr, args, &hdr);
2234         encode_getfattr(xdr, args->bitmask, &hdr);
2235         encode_nops(&hdr);
2236 }
2237
2238 /*
2239  * Encode an OPEN_DOWNGRADE request
2240  */
2241 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2242                                         struct xdr_stream *xdr,
2243                                         struct nfs_closeargs *args)
2244 {
2245         struct compound_hdr hdr = {
2246                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2247         };
2248
2249         encode_compound_hdr(xdr, req, &hdr);
2250         encode_sequence(xdr, &args->seq_args, &hdr);
2251         encode_putfh(xdr, args->fh, &hdr);
2252         encode_open_downgrade(xdr, args, &hdr);
2253         encode_getfattr(xdr, args->bitmask, &hdr);
2254         encode_nops(&hdr);
2255 }
2256
2257 /*
2258  * Encode a LOCK request
2259  */
2260 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2261                               struct nfs_lock_args *args)
2262 {
2263         struct compound_hdr hdr = {
2264                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2265         };
2266
2267         encode_compound_hdr(xdr, req, &hdr);
2268         encode_sequence(xdr, &args->seq_args, &hdr);
2269         encode_putfh(xdr, args->fh, &hdr);
2270         encode_lock(xdr, args, &hdr);
2271         encode_nops(&hdr);
2272 }
2273
2274 /*
2275  * Encode a LOCKT request
2276  */
2277 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2278                                struct nfs_lockt_args *args)
2279 {
2280         struct compound_hdr hdr = {
2281                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2282         };
2283
2284         encode_compound_hdr(xdr, req, &hdr);
2285         encode_sequence(xdr, &args->seq_args, &hdr);
2286         encode_putfh(xdr, args->fh, &hdr);
2287         encode_lockt(xdr, args, &hdr);
2288         encode_nops(&hdr);
2289 }
2290
2291 /*
2292  * Encode a LOCKU request
2293  */
2294 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2295                                struct nfs_locku_args *args)
2296 {
2297         struct compound_hdr hdr = {
2298                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2299         };
2300
2301         encode_compound_hdr(xdr, req, &hdr);
2302         encode_sequence(xdr, &args->seq_args, &hdr);
2303         encode_putfh(xdr, args->fh, &hdr);
2304         encode_locku(xdr, args, &hdr);
2305         encode_nops(&hdr);
2306 }
2307
2308 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2309                                            struct xdr_stream *xdr,
2310                                         struct nfs_release_lockowner_args *args)
2311 {
2312         struct compound_hdr hdr = {
2313                 .minorversion = 0,
2314         };
2315
2316         encode_compound_hdr(xdr, req, &hdr);
2317         encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2318         encode_nops(&hdr);
2319 }
2320
2321 /*
2322  * Encode a READLINK request
2323  */
2324 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2325                                   const struct nfs4_readlink *args)
2326 {
2327         struct compound_hdr hdr = {
2328                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2329         };
2330
2331         encode_compound_hdr(xdr, req, &hdr);
2332         encode_sequence(xdr, &args->seq_args, &hdr);
2333         encode_putfh(xdr, args->fh, &hdr);
2334         encode_readlink(xdr, args, req, &hdr);
2335
2336         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2337                         args->pgbase, args->pglen);
2338         encode_nops(&hdr);
2339 }
2340
2341 /*
2342  * Encode a READDIR request
2343  */
2344 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2345                                  const struct nfs4_readdir_arg *args)
2346 {
2347         struct compound_hdr hdr = {
2348                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2349         };
2350
2351         encode_compound_hdr(xdr, req, &hdr);
2352         encode_sequence(xdr, &args->seq_args, &hdr);
2353         encode_putfh(xdr, args->fh, &hdr);
2354         encode_readdir(xdr, args, req, &hdr);
2355
2356         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2357                          args->pgbase, args->count);
2358         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2359                         __func__, hdr.replen << 2, args->pages,
2360                         args->pgbase, args->count);
2361         encode_nops(&hdr);
2362 }
2363
2364 /*
2365  * Encode a READ request
2366  */
2367 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2368                               struct nfs_readargs *args)
2369 {
2370         struct compound_hdr hdr = {
2371                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2372         };
2373
2374         encode_compound_hdr(xdr, req, &hdr);
2375         encode_sequence(xdr, &args->seq_args, &hdr);
2376         encode_putfh(xdr, args->fh, &hdr);
2377         encode_read(xdr, args, &hdr);
2378
2379         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2380                          args->pages, args->pgbase, args->count);
2381         req->rq_rcv_buf.flags |= XDRBUF_READ;
2382         encode_nops(&hdr);
2383 }
2384
2385 /*
2386  * Encode an SETATTR request
2387  */
2388 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2389                                  struct nfs_setattrargs *args)
2390 {
2391         struct compound_hdr hdr = {
2392                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2393         };
2394
2395         encode_compound_hdr(xdr, req, &hdr);
2396         encode_sequence(xdr, &args->seq_args, &hdr);
2397         encode_putfh(xdr, args->fh, &hdr);
2398         encode_setattr(xdr, args, args->server, &hdr);
2399         encode_getfattr(xdr, args->bitmask, &hdr);
2400         encode_nops(&hdr);
2401 }
2402
2403 /*
2404  * Encode a GETACL request
2405  */
2406 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2407                                 struct nfs_getaclargs *args)
2408 {
2409         struct compound_hdr hdr = {
2410                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2411         };
2412         uint32_t replen;
2413
2414         encode_compound_hdr(xdr, req, &hdr);
2415         encode_sequence(xdr, &args->seq_args, &hdr);
2416         encode_putfh(xdr, args->fh, &hdr);
2417         replen = hdr.replen + op_decode_hdr_maxsz + 1;
2418         encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2419
2420         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2421                 args->acl_pages, args->acl_pgbase, args->acl_len);
2422
2423         encode_nops(&hdr);
2424 }
2425
2426 /*
2427  * Encode a WRITE request
2428  */
2429 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2430                                struct nfs_writeargs *args)
2431 {
2432         struct compound_hdr hdr = {
2433                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2434         };
2435
2436         encode_compound_hdr(xdr, req, &hdr);
2437         encode_sequence(xdr, &args->seq_args, &hdr);
2438         encode_putfh(xdr, args->fh, &hdr);
2439         encode_write(xdr, args, &hdr);
2440         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2441         if (args->bitmask)
2442                 encode_getfattr(xdr, args->bitmask, &hdr);
2443         encode_nops(&hdr);
2444 }
2445
2446 /*
2447  *  a COMMIT request
2448  */
2449 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2450                                 struct nfs_writeargs *args)
2451 {
2452         struct compound_hdr hdr = {
2453                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2454         };
2455
2456         encode_compound_hdr(xdr, req, &hdr);
2457         encode_sequence(xdr, &args->seq_args, &hdr);
2458         encode_putfh(xdr, args->fh, &hdr);
2459         encode_commit(xdr, args, &hdr);
2460         if (args->bitmask)
2461                 encode_getfattr(xdr, args->bitmask, &hdr);
2462         encode_nops(&hdr);
2463 }
2464
2465 /*
2466  * FSINFO request
2467  */
2468 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2469                                 struct nfs4_fsinfo_arg *args)
2470 {
2471         struct compound_hdr hdr = {
2472                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2473         };
2474
2475         encode_compound_hdr(xdr, req, &hdr);
2476         encode_sequence(xdr, &args->seq_args, &hdr);
2477         encode_putfh(xdr, args->fh, &hdr);
2478         encode_fsinfo(xdr, args->bitmask, &hdr);
2479         encode_nops(&hdr);
2480 }
2481
2482 /*
2483  * a PATHCONF request
2484  */
2485 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2486                                   const struct nfs4_pathconf_arg *args)
2487 {
2488         struct compound_hdr hdr = {
2489                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2490         };
2491
2492         encode_compound_hdr(xdr, req, &hdr);
2493         encode_sequence(xdr, &args->seq_args, &hdr);
2494         encode_putfh(xdr, args->fh, &hdr);
2495         encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2496                            &hdr);
2497         encode_nops(&hdr);
2498 }
2499
2500 /*
2501  * a STATFS request
2502  */
2503 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2504                                 const struct nfs4_statfs_arg *args)
2505 {
2506         struct compound_hdr hdr = {
2507                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2508         };
2509
2510         encode_compound_hdr(xdr, req, &hdr);
2511         encode_sequence(xdr, &args->seq_args, &hdr);
2512         encode_putfh(xdr, args->fh, &hdr);
2513         encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2514                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2515         encode_nops(&hdr);
2516 }
2517
2518 /*
2519  * GETATTR_BITMAP request
2520  */
2521 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2522                                      struct xdr_stream *xdr,
2523                                      struct nfs4_server_caps_arg *args)
2524 {
2525         struct compound_hdr hdr = {
2526                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2527         };
2528
2529         encode_compound_hdr(xdr, req, &hdr);
2530         encode_sequence(xdr, &args->seq_args, &hdr);
2531         encode_putfh(xdr, args->fhandle, &hdr);
2532         encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2533                            FATTR4_WORD0_FH_EXPIRE_TYPE|
2534                            FATTR4_WORD0_LINK_SUPPORT|
2535                            FATTR4_WORD0_SYMLINK_SUPPORT|
2536                            FATTR4_WORD0_ACLSUPPORT, &hdr);
2537         encode_nops(&hdr);
2538 }
2539
2540 /*
2541  * a RENEW request
2542  */
2543 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2544                                struct nfs_client *clp)
2545 {
2546         struct compound_hdr hdr = {
2547                 .nops   = 0,
2548         };
2549
2550         encode_compound_hdr(xdr, req, &hdr);
2551         encode_renew(xdr, clp->cl_clientid, &hdr);
2552         encode_nops(&hdr);
2553 }
2554
2555 /*
2556  * a SETCLIENTID request
2557  */
2558 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2559                                      struct xdr_stream *xdr,
2560                                      struct nfs4_setclientid *sc)
2561 {
2562         struct compound_hdr hdr = {
2563                 .nops   = 0,
2564         };
2565
2566         encode_compound_hdr(xdr, req, &hdr);
2567         encode_setclientid(xdr, sc, &hdr);
2568         encode_nops(&hdr);
2569 }
2570
2571 /*
2572  * a SETCLIENTID_CONFIRM request
2573  */
2574 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2575                                              struct xdr_stream *xdr,
2576                                              struct nfs4_setclientid_res *arg)
2577 {
2578         struct compound_hdr hdr = {
2579                 .nops   = 0,
2580         };
2581         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2582
2583         encode_compound_hdr(xdr, req, &hdr);
2584         encode_setclientid_confirm(xdr, arg, &hdr);
2585         encode_putrootfh(xdr, &hdr);
2586         encode_fsinfo(xdr, lease_bitmap, &hdr);
2587         encode_nops(&hdr);
2588 }
2589
2590 /*
2591  * DELEGRETURN request
2592  */
2593 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2594                                      struct xdr_stream *xdr,
2595                                      const struct nfs4_delegreturnargs *args)
2596 {
2597         struct compound_hdr hdr = {
2598                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2599         };
2600
2601         encode_compound_hdr(xdr, req, &hdr);
2602         encode_sequence(xdr, &args->seq_args, &hdr);
2603         encode_putfh(xdr, args->fhandle, &hdr);
2604         encode_delegreturn(xdr, args->stateid, &hdr);
2605         encode_getfattr(xdr, args->bitmask, &hdr);
2606         encode_nops(&hdr);
2607 }
2608
2609 /*
2610  * Encode FS_LOCATIONS request
2611  */
2612 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2613                                       struct xdr_stream *xdr,
2614                                       struct nfs4_fs_locations_arg *args)
2615 {
2616         struct compound_hdr hdr = {
2617                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2618         };
2619         uint32_t replen;
2620
2621         encode_compound_hdr(xdr, req, &hdr);
2622         encode_sequence(xdr, &args->seq_args, &hdr);
2623         encode_putfh(xdr, args->dir_fh, &hdr);
2624         encode_lookup(xdr, args->name, &hdr);
2625         replen = hdr.replen;    /* get the attribute into args->page */
2626         encode_fs_locations(xdr, args->bitmask, &hdr);
2627
2628         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2629                         0, PAGE_SIZE);
2630         encode_nops(&hdr);
2631 }
2632
2633 /*
2634  * Encode SECINFO request
2635  */
2636 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2637                                 struct xdr_stream *xdr,
2638                                 struct nfs4_secinfo_arg *args)
2639 {
2640         struct compound_hdr hdr = {
2641                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2642         };
2643
2644         encode_compound_hdr(xdr, req, &hdr);
2645         encode_sequence(xdr, &args->seq_args, &hdr);
2646         encode_putfh(xdr, args->dir_fh, &hdr);
2647         encode_secinfo(xdr, args->name, &hdr);
2648         encode_nops(&hdr);
2649 }
2650
2651 #if defined(CONFIG_NFS_V4_1)
2652 /*
2653  * EXCHANGE_ID request
2654  */
2655 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2656                                      struct xdr_stream *xdr,
2657                                      struct nfs41_exchange_id_args *args)
2658 {
2659         struct compound_hdr hdr = {
2660                 .minorversion = args->client->cl_mvops->minor_version,
2661         };
2662
2663         encode_compound_hdr(xdr, req, &hdr);
2664         encode_exchange_id(xdr, args, &hdr);
2665         encode_nops(&hdr);
2666 }
2667
2668 /*
2669  * a CREATE_SESSION request
2670  */
2671 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2672                                         struct xdr_stream *xdr,
2673                                         struct nfs41_create_session_args *args)
2674 {
2675         struct compound_hdr hdr = {
2676                 .minorversion = args->client->cl_mvops->minor_version,
2677         };
2678
2679         encode_compound_hdr(xdr, req, &hdr);
2680         encode_create_session(xdr, args, &hdr);
2681         encode_nops(&hdr);
2682 }
2683
2684 /*
2685  * a DESTROY_SESSION request
2686  */
2687 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2688                                          struct xdr_stream *xdr,
2689                                          struct nfs4_session *session)
2690 {
2691         struct compound_hdr hdr = {
2692                 .minorversion = session->clp->cl_mvops->minor_version,
2693         };
2694
2695         encode_compound_hdr(xdr, req, &hdr);
2696         encode_destroy_session(xdr, session, &hdr);
2697         encode_nops(&hdr);
2698 }
2699
2700 /*
2701  * a SEQUENCE request
2702  */
2703 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2704                                   struct nfs4_sequence_args *args)
2705 {
2706         struct compound_hdr hdr = {
2707                 .minorversion = nfs4_xdr_minorversion(args),
2708         };
2709
2710         encode_compound_hdr(xdr, req, &hdr);
2711         encode_sequence(xdr, args, &hdr);
2712         encode_nops(&hdr);
2713 }
2714
2715 /*
2716  * a GET_LEASE_TIME request
2717  */
2718 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2719                                         struct xdr_stream *xdr,
2720                                         struct nfs4_get_lease_time_args *args)
2721 {
2722         struct compound_hdr hdr = {
2723                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2724         };
2725         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2726
2727         encode_compound_hdr(xdr, req, &hdr);
2728         encode_sequence(xdr, &args->la_seq_args, &hdr);
2729         encode_putrootfh(xdr, &hdr);
2730         encode_fsinfo(xdr, lease_bitmap, &hdr);
2731         encode_nops(&hdr);
2732 }
2733
2734 /*
2735  * a RECLAIM_COMPLETE request
2736  */
2737 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2738                                           struct xdr_stream *xdr,
2739                                 struct nfs41_reclaim_complete_args *args)
2740 {
2741         struct compound_hdr hdr = {
2742                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2743         };
2744
2745         encode_compound_hdr(xdr, req, &hdr);
2746         encode_sequence(xdr, &args->seq_args, &hdr);
2747         encode_reclaim_complete(xdr, args, &hdr);
2748         encode_nops(&hdr);
2749 }
2750
2751 /*
2752  * Encode GETDEVICELIST request
2753  */
2754 static void nfs4_xdr_enc_getdevicelist(struct rpc_rqst *req,
2755                                        struct xdr_stream *xdr,
2756                                        struct nfs4_getdevicelist_args *args)
2757 {
2758         struct compound_hdr hdr = {
2759                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2760         };
2761
2762         encode_compound_hdr(xdr, req, &hdr);
2763         encode_sequence(xdr, &args->seq_args, &hdr);
2764         encode_putfh(xdr, args->fh, &hdr);
2765         encode_getdevicelist(xdr, args, &hdr);
2766         encode_nops(&hdr);
2767 }
2768
2769 /*
2770  * Encode GETDEVICEINFO request
2771  */
2772 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2773                                        struct xdr_stream *xdr,
2774                                        struct nfs4_getdeviceinfo_args *args)
2775 {
2776         struct compound_hdr hdr = {
2777                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2778         };
2779
2780         encode_compound_hdr(xdr, req, &hdr);
2781         encode_sequence(xdr, &args->seq_args, &hdr);
2782         encode_getdeviceinfo(xdr, args, &hdr);
2783
2784         /* set up reply kvec. Subtract notification bitmap max size (2)
2785          * so that notification bitmap is put in xdr_buf tail */
2786         xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2787                          args->pdev->pages, args->pdev->pgbase,
2788                          args->pdev->pglen);
2789
2790         encode_nops(&hdr);
2791 }
2792
2793 /*
2794  *  Encode LAYOUTGET request
2795  */
2796 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2797                                    struct xdr_stream *xdr,
2798                                    struct nfs4_layoutget_args *args)
2799 {
2800         struct compound_hdr hdr = {
2801                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2802         };
2803
2804         encode_compound_hdr(xdr, req, &hdr);
2805         encode_sequence(xdr, &args->seq_args, &hdr);
2806         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2807         encode_layoutget(xdr, args, &hdr);
2808
2809         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2810             args->layout.pages, 0, args->layout.pglen);
2811
2812         encode_nops(&hdr);
2813 }
2814
2815 /*
2816  *  Encode LAYOUTCOMMIT request
2817  */
2818 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2819                                       struct xdr_stream *xdr,
2820                                       struct nfs4_layoutcommit_args *args)
2821 {
2822         struct nfs4_layoutcommit_data *data =
2823                 container_of(args, struct nfs4_layoutcommit_data, args);
2824         struct compound_hdr hdr = {
2825                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2826         };
2827
2828         encode_compound_hdr(xdr, req, &hdr);
2829         encode_sequence(xdr, &args->seq_args, &hdr);
2830         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2831         encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2832         encode_getfattr(xdr, args->bitmask, &hdr);
2833         encode_nops(&hdr);
2834 }
2835
2836 /*
2837  * Encode LAYOUTRETURN request
2838  */
2839 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2840                                       struct xdr_stream *xdr,
2841                                       struct nfs4_layoutreturn_args *args)
2842 {
2843         struct compound_hdr hdr = {
2844                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2845         };
2846
2847         encode_compound_hdr(xdr, req, &hdr);
2848         encode_sequence(xdr, &args->seq_args, &hdr);
2849         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2850         encode_layoutreturn(xdr, args, &hdr);
2851         encode_nops(&hdr);
2852 }
2853
2854 /*
2855  * Encode SECINFO_NO_NAME request
2856  */
2857 static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
2858                                         struct xdr_stream *xdr,
2859                                         struct nfs41_secinfo_no_name_args *args)
2860 {
2861         struct compound_hdr hdr = {
2862                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2863         };
2864
2865         encode_compound_hdr(xdr, req, &hdr);
2866         encode_sequence(xdr, &args->seq_args, &hdr);
2867         encode_putrootfh(xdr, &hdr);
2868         encode_secinfo_no_name(xdr, args, &hdr);
2869         encode_nops(&hdr);
2870         return 0;
2871 }
2872
2873 /*
2874  *  Encode TEST_STATEID request
2875  */
2876 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
2877                                       struct xdr_stream *xdr,
2878                                       struct nfs41_test_stateid_args *args)
2879 {
2880         struct compound_hdr hdr = {
2881                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2882         };
2883
2884         encode_compound_hdr(xdr, req, &hdr);
2885         encode_sequence(xdr, &args->seq_args, &hdr);
2886         encode_test_stateid(xdr, args, &hdr);
2887         encode_nops(&hdr);
2888 }
2889
2890 /*
2891  *  Encode FREE_STATEID request
2892  */
2893 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
2894                                      struct xdr_stream *xdr,
2895                                      struct nfs41_free_stateid_args *args)
2896 {
2897         struct compound_hdr hdr = {
2898                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2899         };
2900
2901         encode_compound_hdr(xdr, req, &hdr);
2902         encode_sequence(xdr, &args->seq_args, &hdr);
2903         encode_free_stateid(xdr, args, &hdr);
2904         encode_nops(&hdr);
2905 }
2906 #endif /* CONFIG_NFS_V4_1 */
2907
2908 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
2909 {
2910         dprintk("nfs: %s: prematurely hit end of receive buffer. "
2911                 "Remaining buffer length is %tu words.\n",
2912                 func, xdr->end - xdr->p);
2913 }
2914
2915 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2916 {
2917         __be32 *p;
2918
2919         p = xdr_inline_decode(xdr, 4);
2920         if (unlikely(!p))
2921                 goto out_overflow;
2922         *len = be32_to_cpup(p);
2923         p = xdr_inline_decode(xdr, *len);
2924         if (unlikely(!p))
2925                 goto out_overflow;
2926         *string = (char *)p;
2927         return 0;
2928 out_overflow:
2929         print_overflow_msg(__func__, xdr);
2930         return -EIO;
2931 }
2932
2933 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2934 {
2935         __be32 *p;
2936
2937         p = xdr_inline_decode(xdr, 8);
2938         if (unlikely(!p))
2939                 goto out_overflow;
2940         hdr->status = be32_to_cpup(p++);
2941         hdr->taglen = be32_to_cpup(p);
2942
2943         p = xdr_inline_decode(xdr, hdr->taglen + 4);
2944         if (unlikely(!p))
2945                 goto out_overflow;
2946         hdr->tag = (char *)p;
2947         p += XDR_QUADLEN(hdr->taglen);
2948         hdr->nops = be32_to_cpup(p);
2949         if (unlikely(hdr->nops < 1))
2950                 return nfs4_stat_to_errno(hdr->status);
2951         return 0;
2952 out_overflow:
2953         print_overflow_msg(__func__, xdr);
2954         return -EIO;
2955 }
2956
2957 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2958 {
2959         __be32 *p;
2960         uint32_t opnum;
2961         int32_t nfserr;
2962
2963         p = xdr_inline_decode(xdr, 8);
2964         if (unlikely(!p))
2965                 goto out_overflow;
2966         opnum = be32_to_cpup(p++);
2967         if (opnum != expected) {
2968                 dprintk("nfs: Server returned operation"
2969                         " %d but we issued a request for %d\n",
2970                                 opnum, expected);
2971                 return -EIO;
2972         }
2973         nfserr = be32_to_cpup(p);
2974         if (nfserr != NFS_OK)
2975                 return nfs4_stat_to_errno(nfserr);
2976         return 0;
2977 out_overflow:
2978         print_overflow_msg(__func__, xdr);
2979         return -EIO;
2980 }
2981
2982 /* Dummy routine */
2983 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2984 {
2985         __be32 *p;
2986         unsigned int strlen;
2987         char *str;
2988
2989         p = xdr_inline_decode(xdr, 12);
2990         if (likely(p))
2991                 return decode_opaque_inline(xdr, &strlen, &str);
2992         print_overflow_msg(__func__, xdr);
2993         return -EIO;
2994 }
2995
2996 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2997 {
2998         uint32_t bmlen;
2999         __be32 *p;
3000
3001         p = xdr_inline_decode(xdr, 4);
3002         if (unlikely(!p))
3003                 goto out_overflow;
3004         bmlen = be32_to_cpup(p);
3005
3006         bitmap[0] = bitmap[1] = bitmap[2] = 0;
3007         p = xdr_inline_decode(xdr, (bmlen << 2));
3008         if (unlikely(!p))
3009                 goto out_overflow;
3010         if (bmlen > 0) {
3011                 bitmap[0] = be32_to_cpup(p++);
3012                 if (bmlen > 1) {
3013                         bitmap[1] = be32_to_cpup(p++);
3014                         if (bmlen > 2)
3015                                 bitmap[2] = be32_to_cpup(p);
3016                 }
3017         }
3018         return 0;
3019 out_overflow:
3020         print_overflow_msg(__func__, xdr);
3021         return -EIO;
3022 }
3023
3024 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
3025 {
3026         __be32 *p;
3027
3028         p = xdr_inline_decode(xdr, 4);
3029         if (unlikely(!p))
3030                 goto out_overflow;
3031         *attrlen = be32_to_cpup(p);
3032         *savep = xdr->p;
3033         return 0;
3034 out_overflow:
3035         print_overflow_msg(__func__, xdr);
3036         return -EIO;
3037 }
3038
3039 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3040 {
3041         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3042                 int ret;
3043                 ret = decode_attr_bitmap(xdr, bitmask);
3044                 if (unlikely(ret < 0))
3045                         return ret;
3046                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3047         } else
3048                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3049         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3050                 bitmask[0], bitmask[1], bitmask[2]);
3051         return 0;
3052 }
3053
3054 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3055 {
3056         __be32 *p;
3057         int ret = 0;
3058
3059         *type = 0;
3060         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3061                 return -EIO;
3062         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3063                 p = xdr_inline_decode(xdr, 4);
3064                 if (unlikely(!p))
3065                         goto out_overflow;
3066                 *type = be32_to_cpup(p);
3067                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3068                         dprintk("%s: bad type %d\n", __func__, *type);
3069                         return -EIO;
3070                 }
3071                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3072                 ret = NFS_ATTR_FATTR_TYPE;
3073         }
3074         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3075         return ret;
3076 out_overflow:
3077         print_overflow_msg(__func__, xdr);
3078         return -EIO;
3079 }
3080
3081 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3082                                       uint32_t *bitmap, uint32_t *type)
3083 {
3084         __be32 *p;
3085
3086         *type = 0;
3087         if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3088                 return -EIO;
3089         if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3090                 p = xdr_inline_decode(xdr, 4);
3091                 if (unlikely(!p))
3092                         goto out_overflow;
3093                 *type = be32_to_cpup(p);
3094                 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3095         }
3096         dprintk("%s: expire type=0x%x\n", __func__, *type);
3097         return 0;
3098 out_overflow:
3099         print_overflow_msg(__func__, xdr);
3100         return -EIO;
3101 }
3102
3103 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3104 {
3105         __be32 *p;
3106         int ret = 0;
3107
3108         *change = 0;
3109         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3110                 return -EIO;
3111         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3112                 p = xdr_inline_decode(xdr, 8);
3113                 if (unlikely(!p))
3114                         goto out_overflow;
3115                 xdr_decode_hyper(p, change);
3116                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3117                 ret = NFS_ATTR_FATTR_CHANGE;
3118         }
3119         dprintk("%s: change attribute=%Lu\n", __func__,
3120                         (unsigned long long)*change);
3121         return ret;
3122 out_overflow:
3123         print_overflow_msg(__func__, xdr);
3124         return -EIO;
3125 }
3126
3127 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3128 {
3129         __be32 *p;
3130         int ret = 0;
3131
3132         *size = 0;
3133         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3134                 return -EIO;
3135         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3136                 p = xdr_inline_decode(xdr, 8);
3137                 if (unlikely(!p))
3138                         goto out_overflow;
3139                 xdr_decode_hyper(p, size);
3140                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3141                 ret = NFS_ATTR_FATTR_SIZE;
3142         }
3143         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3144         return ret;
3145 out_overflow:
3146         print_overflow_msg(__func__, xdr);
3147         return -EIO;
3148 }
3149
3150 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3151 {
3152         __be32 *p;
3153
3154         *res = 0;
3155         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3156                 return -EIO;
3157         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3158                 p = xdr_inline_decode(xdr, 4);
3159                 if (unlikely(!p))
3160                         goto out_overflow;
3161                 *res = be32_to_cpup(p);
3162                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3163         }
3164         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3165         return 0;
3166 out_overflow:
3167         print_overflow_msg(__func__, xdr);
3168         return -EIO;
3169 }
3170
3171 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3172 {
3173         __be32 *p;
3174
3175         *res = 0;
3176         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3177                 return -EIO;
3178         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3179                 p = xdr_inline_decode(xdr, 4);
3180                 if (unlikely(!p))
3181                         goto out_overflow;
3182                 *res = be32_to_cpup(p);
3183                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3184         }
3185         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3186         return 0;
3187 out_overflow:
3188         print_overflow_msg(__func__, xdr);
3189         return -EIO;
3190 }
3191
3192 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3193 {
3194         __be32 *p;
3195         int ret = 0;
3196
3197         fsid->major = 0;
3198         fsid->minor = 0;
3199         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3200                 return -EIO;
3201         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3202                 p = xdr_inline_decode(xdr, 16);
3203                 if (unlikely(!p))
3204                         goto out_overflow;
3205                 p = xdr_decode_hyper(p, &fsid->major);
3206                 xdr_decode_hyper(p, &fsid->minor);
3207                 bitmap[0] &= ~FATTR4_WORD0_FSID;
3208                 ret = NFS_ATTR_FATTR_FSID;
3209         }
3210         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3211                         (unsigned long long)fsid->major,
3212                         (unsigned long long)fsid->minor);
3213         return ret;
3214 out_overflow:
3215         print_overflow_msg(__func__, xdr);
3216         return -EIO;
3217 }
3218
3219 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3220 {
3221         __be32 *p;
3222
3223         *res = 60;
3224         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3225                 return -EIO;
3226         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3227                 p = xdr_inline_decode(xdr, 4);
3228                 if (unlikely(!p))
3229                         goto out_overflow;
3230                 *res = be32_to_cpup(p);
3231                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3232         }
3233         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3234         return 0;
3235 out_overflow:
3236         print_overflow_msg(__func__, xdr);
3237         return -EIO;
3238 }
3239
3240 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3241 {
3242         __be32 *p;
3243
3244         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3245                 return -EIO;
3246         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3247                 p = xdr_inline_decode(xdr, 4);
3248                 if (unlikely(!p))
3249                         goto out_overflow;
3250                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3251                 *res = -be32_to_cpup(p);
3252         }
3253         return 0;
3254 out_overflow:
3255         print_overflow_msg(__func__, xdr);
3256         return -EIO;
3257 }
3258
3259 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3260 {
3261         __be32 *p;
3262         int len;
3263
3264         if (fh != NULL)
3265                 memset(fh, 0, sizeof(*fh));
3266
3267         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3268                 return -EIO;
3269         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3270                 p = xdr_inline_decode(xdr, 4);
3271                 if (unlikely(!p))
3272                         goto out_overflow;
3273                 len = be32_to_cpup(p);
3274                 if (len > NFS4_FHSIZE)
3275                         return -EIO;
3276                 p = xdr_inline_decode(xdr, len);
3277                 if (unlikely(!p))
3278                         goto out_overflow;
3279                 if (fh != NULL) {
3280                         memcpy(fh->data, p, len);
3281                         fh->size = len;
3282                 }
3283                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3284         }
3285         return 0;
3286 out_overflow:
3287         print_overflow_msg(__func__, xdr);
3288         return -EIO;
3289 }
3290
3291 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3292 {
3293         __be32 *p;
3294
3295         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
3296         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3297                 return -EIO;
3298         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3299                 p = xdr_inline_decode(xdr, 4);
3300                 if (unlikely(!p))
3301                         goto out_overflow;
3302                 *res = be32_to_cpup(p);
3303                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3304         }
3305         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3306         return 0;
3307 out_overflow:
3308         print_overflow_msg(__func__, xdr);
3309         return -EIO;
3310 }
3311
3312 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3313 {
3314         __be32 *p;
3315         int ret = 0;
3316
3317         *fileid = 0;
3318         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3319                 return -EIO;
3320         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3321                 p = xdr_inline_decode(xdr, 8);
3322                 if (unlikely(!p))
3323                         goto out_overflow;
3324                 xdr_decode_hyper(p, fileid);
3325                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3326                 ret = NFS_ATTR_FATTR_FILEID;
3327         }
3328         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3329         return ret;
3330 out_overflow:
3331         print_overflow_msg(__func__, xdr);
3332         return -EIO;
3333 }
3334
3335 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3336 {
3337         __be32 *p;
3338         int ret = 0;
3339
3340         *fileid = 0;
3341         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3342                 return -EIO;
3343         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3344                 p = xdr_inline_decode(xdr, 8);
3345                 if (unlikely(!p))
3346                         goto out_overflow;
3347                 xdr_decode_hyper(p, fileid);
3348                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3349                 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3350         }
3351         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3352         return ret;
3353 out_overflow:
3354         print_overflow_msg(__func__, xdr);
3355         return -EIO;
3356 }
3357
3358 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3359 {
3360         __be32 *p;
3361         int status = 0;
3362
3363         *res = 0;
3364         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3365                 return -EIO;
3366         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3367                 p = xdr_inline_decode(xdr, 8);
3368                 if (unlikely(!p))
3369                         goto out_overflow;
3370                 xdr_decode_hyper(p, res);
3371                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3372         }
3373         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3374         return status;
3375 out_overflow:
3376         print_overflow_msg(__func__, xdr);
3377         return -EIO;
3378 }
3379
3380 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3381 {
3382         __be32 *p;
3383         int status = 0;
3384
3385         *res = 0;
3386         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3387                 return -EIO;
3388         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3389                 p = xdr_inline_decode(xdr, 8);
3390                 if (unlikely(!p))
3391                         goto out_overflow;
3392                 xdr_decode_hyper(p, res);
3393                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3394         }
3395         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3396         return status;
3397 out_overflow:
3398         print_overflow_msg(__func__, xdr);
3399         return -EIO;
3400 }
3401
3402 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3403 {
3404         __be32 *p;
3405         int status = 0;
3406
3407         *res = 0;
3408         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3409                 return -EIO;
3410         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3411                 p = xdr_inline_decode(xdr, 8);
3412                 if (unlikely(!p))
3413                         goto out_overflow;
3414                 xdr_decode_hyper(p, res);
3415                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3416         }
3417         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3418         return status;
3419 out_overflow:
3420         print_overflow_msg(__func__, xdr);
3421         return -EIO;
3422 }
3423
3424 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3425 {
3426         u32 n;
3427         __be32 *p;
3428         int status = 0;
3429
3430         p = xdr_inline_decode(xdr, 4);
3431         if (unlikely(!p))
3432                 goto out_overflow;
3433         n = be32_to_cpup(p);
3434         if (n == 0)
3435                 goto root_path;
3436         dprintk("pathname4: ");
3437         path->ncomponents = 0;
3438         while (path->ncomponents < n) {
3439                 struct nfs4_string *component = &path->components[path->ncomponents];
3440                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3441                 if (unlikely(status != 0))
3442                         goto out_eio;
3443                 ifdebug (XDR)
3444                         pr_cont("%s%.*s ",
3445                                 (path->ncomponents != n ? "/ " : ""),
3446                                 component->len, component->data);
3447                 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
3448                         path->ncomponents++;
3449                 else {
3450                         dprintk("cannot parse %d components in path\n", n);
3451                         goto out_eio;
3452                 }
3453         }
3454 out:
3455         return status;
3456 root_path:
3457 /* a root pathname is sent as a zero component4 */
3458         path->ncomponents = 1;
3459         path->components[0].len=0;
3460         path->components[0].data=NULL;
3461         dprintk("pathname4: /\n");
3462         goto out;
3463 out_eio:
3464         dprintk(" status %d", status);
3465         status = -EIO;
3466         goto out;
3467 out_overflow:
3468         print_overflow_msg(__func__, xdr);
3469         return -EIO;
3470 }
3471
3472 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3473 {
3474         int n;
3475         __be32 *p;
3476         int status = -EIO;
3477
3478         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3479                 goto out;
3480         status = 0;
3481         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3482                 goto out;
3483         status = -EIO;
3484         /* Ignore borken servers that return unrequested attrs */
3485         if (unlikely(res == NULL))
3486                 goto out;
3487         dprintk("%s: fsroot:\n", __func__);
3488         status = decode_pathname(xdr, &res->fs_path);
3489         if (unlikely(status != 0))
3490                 goto out;
3491         p = xdr_inline_decode(xdr, 4);
3492         if (unlikely(!p))
3493                 goto out_overflow;
3494         n = be32_to_cpup(p);
3495         if (n <= 0)
3496                 goto out_eio;
3497         res->nlocations = 0;
3498         while (res->nlocations < n) {
3499                 u32 m;
3500                 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
3501
3502                 p = xdr_inline_decode(xdr, 4);
3503                 if (unlikely(!p))
3504                         goto out_overflow;
3505                 m = be32_to_cpup(p);
3506
3507                 loc->nservers = 0;
3508                 dprintk("%s: servers:\n", __func__);
3509                 while (loc->nservers < m) {
3510                         struct nfs4_string *server = &loc->servers[loc->nservers];
3511                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3512                         if (unlikely(status != 0))
3513                                 goto out_eio;
3514                         dprintk("%s ", server->data);
3515                         if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
3516                                 loc->nservers++;
3517                         else {
3518                                 unsigned int i;
3519                                 dprintk("%s: using first %u of %u servers "
3520                                         "returned for location %u\n",
3521                                                 __func__,
3522                                                 NFS4_FS_LOCATION_MAXSERVERS,
3523                                                 m, res->nlocations);
3524                                 for (i = loc->nservers; i < m; i++) {
3525                                         unsigned int len;
3526                                         char *data;
3527                                         status = decode_opaque_inline(xdr, &len, &data);
3528                                         if (unlikely(status != 0))
3529                                                 goto out_eio;
3530                                 }
3531                         }
3532                 }
3533                 status = decode_pathname(xdr, &loc->rootpath);
3534                 if (unlikely(status != 0))
3535                         goto out_eio;
3536                 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
3537                         res->nlocations++;
3538         }
3539         if (res->nlocations != 0)
3540                 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3541 out:
3542         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3543         return status;
3544 out_overflow:
3545         print_overflow_msg(__func__, xdr);
3546 out_eio:
3547         status = -EIO;
3548         goto out;
3549 }
3550
3551 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3552 {
3553         __be32 *p;
3554         int status = 0;
3555
3556         *res = 0;
3557         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3558                 return -EIO;
3559         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3560                 p = xdr_inline_decode(xdr, 8);
3561                 if (unlikely(!p))
3562                         goto out_overflow;
3563                 xdr_decode_hyper(p, res);
3564                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3565         }
3566         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3567         return status;
3568 out_overflow:
3569         print_overflow_msg(__func__, xdr);
3570         return -EIO;
3571 }
3572
3573 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3574 {
3575         __be32 *p;
3576         int status = 0;
3577
3578         *maxlink = 1;
3579         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3580                 return -EIO;
3581         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3582                 p = xdr_inline_decode(xdr, 4);
3583                 if (unlikely(!p))
3584                         goto out_overflow;
3585                 *maxlink = be32_to_cpup(p);
3586                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3587         }
3588         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3589         return status;
3590 out_overflow:
3591         print_overflow_msg(__func__, xdr);
3592         return -EIO;
3593 }
3594
3595 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3596 {
3597         __be32 *p;
3598         int status = 0;
3599
3600         *maxname = 1024;
3601         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3602                 return -EIO;
3603         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3604                 p = xdr_inline_decode(xdr, 4);
3605                 if (unlikely(!p))
3606                         goto out_overflow;
3607                 *maxname = be32_to_cpup(p);
3608                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3609         }
3610         dprintk("%s: maxname=%u\n", __func__, *maxname);
3611         return status;
3612 out_overflow:
3613         print_overflow_msg(__func__, xdr);
3614         return -EIO;
3615 }
3616
3617 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3618 {
3619         __be32 *p;
3620         int status = 0;
3621
3622         *res = 1024;
3623         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3624                 return -EIO;
3625         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3626                 uint64_t maxread;
3627                 p = xdr_inline_decode(xdr, 8);
3628                 if (unlikely(!p))
3629                         goto out_overflow;
3630                 xdr_decode_hyper(p, &maxread);
3631                 if (maxread > 0x7FFFFFFF)
3632                         maxread = 0x7FFFFFFF;
3633                 *res = (uint32_t)maxread;
3634                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3635         }
3636         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3637         return status;
3638 out_overflow:
3639         print_overflow_msg(__func__, xdr);
3640         return -EIO;
3641 }
3642
3643 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3644 {
3645         __be32 *p;
3646         int status = 0;
3647
3648         *res = 1024;
3649         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3650                 return -EIO;
3651         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3652                 uint64_t maxwrite;
3653                 p = xdr_inline_decode(xdr, 8);
3654                 if (unlikely(!p))
3655                         goto out_overflow;
3656                 xdr_decode_hyper(p, &maxwrite);
3657                 if (maxwrite > 0x7FFFFFFF)
3658                         maxwrite = 0x7FFFFFFF;
3659                 *res = (uint32_t)maxwrite;
3660                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3661         }
3662         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3663         return status;
3664 out_overflow:
3665         print_overflow_msg(__func__, xdr);
3666         return -EIO;
3667 }
3668
3669 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3670 {
3671         uint32_t tmp;
3672         __be32 *p;
3673         int ret = 0;
3674
3675         *mode = 0;
3676         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3677                 return -EIO;
3678         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3679                 p = xdr_inline_decode(xdr, 4);
3680                 if (unlikely(!p))
3681                         goto out_overflow;
3682                 tmp = be32_to_cpup(p);
3683                 *mode = tmp & ~S_IFMT;
3684                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3685                 ret = NFS_ATTR_FATTR_MODE;
3686         }
3687         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3688         return ret;
3689 out_overflow:
3690         print_overflow_msg(__func__, xdr);
3691         return -EIO;
3692 }
3693
3694 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3695 {
3696         __be32 *p;
3697         int ret = 0;
3698
3699         *nlink = 1;
3700         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3701                 return -EIO;
3702         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3703                 p = xdr_inline_decode(xdr, 4);
3704                 if (unlikely(!p))
3705                         goto out_overflow;
3706                 *nlink = be32_to_cpup(p);
3707                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3708                 ret = NFS_ATTR_FATTR_NLINK;
3709         }
3710         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3711         return ret;
3712 out_overflow:
3713         print_overflow_msg(__func__, xdr);
3714         return -EIO;
3715 }
3716
3717 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3718                 const struct nfs_server *server, uint32_t *uid,
3719                 struct nfs4_string *owner_name)
3720 {
3721         uint32_t len;
3722         __be32 *p;
3723         int ret = 0;
3724
3725         *uid = -2;
3726         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3727                 return -EIO;
3728         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3729                 p = xdr_inline_decode(xdr, 4);
3730                 if (unlikely(!p))
3731                         goto out_overflow;
3732                 len = be32_to_cpup(p);
3733                 p = xdr_inline_decode(xdr, len);
3734                 if (unlikely(!p))
3735                         goto out_overflow;
3736                 if (owner_name != NULL) {
3737                         owner_name->data = kmemdup(p, len, GFP_NOWAIT);
3738                         if (owner_name->data != NULL) {
3739                                 owner_name->len = len;
3740                                 ret = NFS_ATTR_FATTR_OWNER_NAME;
3741                         }
3742                 } else if (len < XDR_MAX_NETOBJ) {
3743                         if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3744                                 ret = NFS_ATTR_FATTR_OWNER;
3745                         else
3746                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3747                                                 __func__);
3748                 } else
3749                         dprintk("%s: name too long (%u)!\n",
3750                                         __func__, len);
3751                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3752         }
3753         dprintk("%s: uid=%d\n", __func__, (int)*uid);
3754         return ret;
3755 out_overflow:
3756         print_overflow_msg(__func__, xdr);
3757         return -EIO;
3758 }
3759
3760 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3761                 const struct nfs_server *server, uint32_t *gid,
3762                 struct nfs4_string *group_name)
3763 {
3764         uint32_t len;
3765         __be32 *p;
3766         int ret = 0;
3767
3768         *gid = -2;
3769         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3770                 return -EIO;
3771         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3772                 p = xdr_inline_decode(xdr, 4);
3773                 if (unlikely(!p))
3774                         goto out_overflow;
3775                 len = be32_to_cpup(p);
3776                 p = xdr_inline_decode(xdr, len);
3777                 if (unlikely(!p))
3778                         goto out_overflow;
3779                 if (group_name != NULL) {
3780                         group_name->data = kmemdup(p, len, GFP_NOWAIT);
3781                         if (group_name->data != NULL) {
3782                                 group_name->len = len;
3783                                 ret = NFS_ATTR_FATTR_GROUP_NAME;
3784                         }
3785                 } else if (len < XDR_MAX_NETOBJ) {
3786                         if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3787                                 ret = NFS_ATTR_FATTR_GROUP;
3788                         else
3789                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3790                                                 __func__);
3791                 } else
3792                         dprintk("%s: name too long (%u)!\n",
3793                                         __func__, len);
3794                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3795         }
3796         dprintk("%s: gid=%d\n", __func__, (int)*gid);
3797         return ret;
3798 out_overflow:
3799         print_overflow_msg(__func__, xdr);
3800         return -EIO;
3801 }
3802
3803 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3804 {
3805         uint32_t major = 0, minor = 0;
3806         __be32 *p;
3807         int ret = 0;
3808
3809         *rdev = MKDEV(0,0);
3810         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3811                 return -EIO;
3812         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3813                 dev_t tmp;
3814
3815                 p = xdr_inline_decode(xdr, 8);
3816                 if (unlikely(!p))
3817                         goto out_overflow;
3818                 major = be32_to_cpup(p++);
3819                 minor = be32_to_cpup(p);
3820                 tmp = MKDEV(major, minor);
3821                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3822                         *rdev = tmp;
3823                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3824                 ret = NFS_ATTR_FATTR_RDEV;
3825         }
3826         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3827         return ret;
3828 out_overflow:
3829         print_overflow_msg(__func__, xdr);
3830         return -EIO;
3831 }
3832
3833 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3834 {
3835         __be32 *p;
3836         int status = 0;
3837
3838         *res = 0;
3839         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3840                 return -EIO;
3841         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3842                 p = xdr_inline_decode(xdr, 8);
3843                 if (unlikely(!p))
3844                         goto out_overflow;
3845                 xdr_decode_hyper(p, res);
3846                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3847         }
3848         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3849         return status;
3850 out_overflow:
3851         print_overflow_msg(__func__, xdr);
3852         return -EIO;
3853 }
3854
3855 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3856 {
3857         __be32 *p;
3858         int status = 0;
3859
3860         *res = 0;
3861         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3862                 return -EIO;
3863         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3864                 p = xdr_inline_decode(xdr, 8);
3865                 if (unlikely(!p))
3866                         goto out_overflow;
3867                 xdr_decode_hyper(p, res);
3868                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3869         }
3870         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3871         return status;
3872 out_overflow:
3873         print_overflow_msg(__func__, xdr);
3874         return -EIO;
3875 }
3876
3877 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3878 {
3879         __be32 *p;
3880         int status = 0;
3881
3882         *res = 0;
3883         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3884                 return -EIO;
3885         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3886                 p = xdr_inline_decode(xdr, 8);
3887                 if (unlikely(!p))
3888                         goto out_overflow;
3889                 xdr_decode_hyper(p, res);
3890                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3891         }
3892         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3893         return status;
3894 out_overflow:
3895         print_overflow_msg(__func__, xdr);
3896         return -EIO;
3897 }
3898
3899 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3900 {
3901         __be32 *p;
3902         int ret = 0;
3903
3904         *used = 0;
3905         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3906                 return -EIO;
3907         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3908                 p = xdr_inline_decode(xdr, 8);
3909                 if (unlikely(!p))
3910                         goto out_overflow;
3911                 xdr_decode_hyper(p, used);
3912                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3913                 ret = NFS_ATTR_FATTR_SPACE_USED;
3914         }
3915         dprintk("%s: space used=%Lu\n", __func__,
3916                         (unsigned long long)*used);
3917         return ret;
3918 out_overflow:
3919         print_overflow_msg(__func__, xdr);
3920         return -EIO;
3921 }
3922
3923 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
3924 {
3925         __be32 *p;
3926         uint64_t sec;
3927         uint32_t nsec;
3928
3929         p = xdr_inline_decode(xdr, 12);
3930         if (unlikely(!p))
3931                 goto out_overflow;
3932         p = xdr_decode_hyper(p, &sec);
3933         nsec = be32_to_cpup(p);
3934         time->tv_sec = (time_t)sec;
3935         time->tv_nsec = (long)nsec;
3936         return 0;
3937 out_overflow:
3938         print_overflow_msg(__func__, xdr);
3939         return -EIO;
3940 }
3941
3942 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3943 {
3944         int status = 0;
3945
3946         time->tv_sec = 0;
3947         time->tv_nsec = 0;
3948         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
3949                 return -EIO;
3950         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
3951                 status = decode_attr_time(xdr, time);
3952                 if (status == 0)
3953                         status = NFS_ATTR_FATTR_ATIME;
3954                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
3955         }
3956         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
3957         return status;
3958 }
3959
3960 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3961 {
3962         int status = 0;
3963
3964         time->tv_sec = 0;
3965         time->tv_nsec = 0;
3966         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
3967                 return -EIO;
3968         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
3969                 status = decode_attr_time(xdr, time);
3970                 if (status == 0)
3971                         status = NFS_ATTR_FATTR_CTIME;
3972                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
3973         }
3974         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
3975         return status;
3976 }
3977
3978 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
3979                                   struct timespec *time)
3980 {
3981         int status = 0;
3982
3983         time->tv_sec = 0;
3984         time->tv_nsec = 0;
3985         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
3986                 return -EIO;
3987         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
3988                 status = decode_attr_time(xdr, time);
3989                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
3990         }
3991         dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
3992                 (long)time->tv_nsec);
3993         return status;
3994 }
3995
3996 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3997 {
3998         int status = 0;
3999
4000         time->tv_sec = 0;
4001         time->tv_nsec = 0;
4002         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4003                 return -EIO;
4004         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4005                 status = decode_attr_time(xdr, time);
4006                 if (status == 0)
4007                         status = NFS_ATTR_FATTR_MTIME;
4008                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4009         }
4010         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4011         return status;
4012 }
4013
4014 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
4015 {
4016         unsigned int attrwords = XDR_QUADLEN(attrlen);
4017         unsigned int nwords = xdr->p - savep;
4018
4019         if (unlikely(attrwords != nwords)) {
4020                 dprintk("%s: server returned incorrect attribute length: "
4021                         "%u %c %u\n",
4022                                 __func__,
4023                                 attrwords << 2,
4024                                 (attrwords < nwords) ? '<' : '>',
4025                                 nwords << 2);
4026                 return -EIO;
4027         }
4028         return 0;
4029 }
4030
4031 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4032 {
4033         __be32 *p;
4034
4035         p = xdr_inline_decode(xdr, 20);
4036         if (unlikely(!p))
4037                 goto out_overflow;
4038         cinfo->atomic = be32_to_cpup(p++);
4039         p = xdr_decode_hyper(p, &cinfo->before);
4040         xdr_decode_hyper(p, &cinfo->after);
4041         return 0;
4042 out_overflow:
4043         print_overflow_msg(__func__, xdr);
4044         return -EIO;
4045 }
4046
4047 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
4048 {
4049         __be32 *p;
4050         uint32_t supp, acc;
4051         int status;
4052
4053         status = decode_op_hdr(xdr, OP_ACCESS);
4054         if (status)
4055                 return status;
4056         p = xdr_inline_decode(xdr, 8);
4057         if (unlikely(!p))
4058                 goto out_overflow;
4059         supp = be32_to_cpup(p++);
4060         acc = be32_to_cpup(p);
4061         access->supported = supp;
4062         access->access = acc;
4063         return 0;
4064 out_overflow:
4065         print_overflow_msg(__func__, xdr);
4066         return -EIO;
4067 }
4068
4069 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4070 {
4071         __be32 *p;
4072
4073         p = xdr_inline_decode(xdr, len);
4074         if (likely(p)) {
4075                 memcpy(buf, p, len);
4076                 return 0;
4077         }
4078         print_overflow_msg(__func__, xdr);
4079         return -EIO;
4080 }
4081
4082 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4083 {
4084         return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4085 }
4086
4087 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4088 {
4089         int status;
4090
4091         status = decode_op_hdr(xdr, OP_CLOSE);
4092         if (status != -EIO)
4093                 nfs_increment_open_seqid(status, res->seqid);
4094         if (!status)
4095                 status = decode_stateid(xdr, &res->stateid);
4096         return status;
4097 }
4098
4099 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4100 {
4101         return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4102 }
4103
4104 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
4105 {
4106         int status;
4107
4108         status = decode_op_hdr(xdr, OP_COMMIT);
4109         if (!status)
4110                 status = decode_verifier(xdr, res->verf->verifier);
4111         return status;
4112 }
4113
4114 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4115 {
4116         __be32 *p;
4117         uint32_t bmlen;
4118         int status;
4119
4120         status = decode_op_hdr(xdr, OP_CREATE);
4121         if (status)
4122                 return status;
4123         if ((status = decode_change_info(xdr, cinfo)))
4124                 return status;
4125         p = xdr_inline_decode(xdr, 4);
4126         if (unlikely(!p))
4127                 goto out_overflow;
4128         bmlen = be32_to_cpup(p);
4129         p = xdr_inline_decode(xdr, bmlen << 2);
4130         if (likely(p))
4131                 return 0;
4132 out_overflow:
4133         print_overflow_msg(__func__, xdr);
4134         return -EIO;
4135 }
4136
4137 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4138 {
4139         __be32 *savep;
4140         uint32_t attrlen, bitmap[3] = {0};
4141         int status;
4142
4143         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4144                 goto xdr_error;
4145         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4146                 goto xdr_error;
4147         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4148                 goto xdr_error;
4149         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4150                 goto xdr_error;
4151         if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4152                                                  &res->fh_expire_type)) != 0)
4153                 goto xdr_error;
4154         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4155                 goto xdr_error;
4156         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4157                 goto xdr_error;
4158         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4159                 goto xdr_error;
4160         status = verify_attr_len(xdr, savep, attrlen);
4161 xdr_error:
4162         dprintk("%s: xdr returned %d!\n", __func__, -status);
4163         return status;
4164 }
4165
4166 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4167 {
4168         __be32 *savep;
4169         uint32_t attrlen, bitmap[3] = {0};
4170         int status;
4171
4172         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4173                 goto xdr_error;
4174         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4175                 goto xdr_error;
4176         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4177                 goto xdr_error;
4178
4179         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4180                 goto xdr_error;
4181         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4182                 goto xdr_error;
4183         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4184                 goto xdr_error;
4185         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4186                 goto xdr_error;
4187         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4188                 goto xdr_error;
4189         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4190                 goto xdr_error;
4191
4192         status = verify_attr_len(xdr, savep, attrlen);
4193 xdr_error:
4194         dprintk("%s: xdr returned %d!\n", __func__, -status);
4195         return status;
4196 }
4197
4198 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4199 {
4200         __be32 *savep;
4201         uint32_t attrlen, bitmap[3] = {0};
4202         int status;
4203
4204         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4205                 goto xdr_error;
4206         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4207                 goto xdr_error;
4208         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4209                 goto xdr_error;
4210
4211         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4212                 goto xdr_error;
4213         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4214                 goto xdr_error;
4215
4216         status = verify_attr_len(xdr, savep, attrlen);
4217 xdr_error:
4218         dprintk("%s: xdr returned %d!\n", __func__, -status);
4219         return status;
4220 }
4221
4222 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4223                 struct nfs_fattr *fattr, struct nfs_fh *fh,
4224                 struct nfs4_fs_locations *fs_loc,
4225                 const struct nfs_server *server)
4226 {
4227         int status;
4228         umode_t fmode = 0;
4229         uint32_t type;
4230         int32_t err;
4231
4232         status = decode_attr_type(xdr, bitmap, &type);
4233         if (status < 0)
4234                 goto xdr_error;
4235         fattr->mode = 0;
4236         if (status != 0) {
4237                 fattr->mode |= nfs_type2fmt[type];
4238                 fattr->valid |= status;
4239         }
4240
4241         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4242         if (status < 0)
4243                 goto xdr_error;
4244         fattr->valid |= status;
4245
4246         status = decode_attr_size(xdr, bitmap, &fattr->size);
4247         if (status < 0)
4248                 goto xdr_error;
4249         fattr->valid |= status;
4250
4251         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4252         if (status < 0)
4253                 goto xdr_error;
4254         fattr->valid |= status;
4255
4256         err = 0;
4257         status = decode_attr_error(xdr, bitmap, &err);
4258         if (status < 0)
4259                 goto xdr_error;
4260         if (err == -NFS4ERR_WRONGSEC)
4261                 nfs_fixup_secinfo_attributes(fattr, fh);
4262
4263         status = decode_attr_filehandle(xdr, bitmap, fh);
4264         if (status < 0)
4265                 goto xdr_error;
4266
4267         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4268         if (status < 0)
4269                 goto xdr_error;
4270         fattr->valid |= status;
4271
4272         status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4273         if (status < 0)
4274                 goto xdr_error;
4275         fattr->valid |= status;
4276
4277         status = decode_attr_mode(xdr, bitmap, &fmode);
4278         if (status < 0)
4279                 goto xdr_error;
4280         if (status != 0) {
4281                 fattr->mode |= fmode;
4282                 fattr->valid |= status;
4283         }
4284
4285         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4286         if (status < 0)
4287                 goto xdr_error;
4288         fattr->valid |= status;
4289
4290         status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4291         if (status < 0)
4292                 goto xdr_error;
4293         fattr->valid |= status;
4294
4295         status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4296         if (status < 0)
4297                 goto xdr_error;
4298         fattr->valid |= status;
4299
4300         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4301         if (status < 0)
4302                 goto xdr_error;
4303         fattr->valid |= status;
4304
4305         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4306         if (status < 0)
4307                 goto xdr_error;
4308         fattr->valid |= status;
4309
4310         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4311         if (status < 0)
4312                 goto xdr_error;
4313         fattr->valid |= status;
4314
4315         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4316         if (status < 0)
4317                 goto xdr_error;
4318         fattr->valid |= status;
4319
4320         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4321         if (status < 0)
4322                 goto xdr_error;
4323         fattr->valid |= status;
4324
4325         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4326         if (status < 0)
4327                 goto xdr_error;
4328         fattr->valid |= status;
4329
4330 xdr_error:
4331         dprintk("%s: xdr returned %d\n", __func__, -status);
4332         return status;
4333 }
4334
4335 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4336                 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4337                 const struct nfs_server *server)
4338 {
4339         __be32 *savep;
4340         uint32_t attrlen,
4341                  bitmap[3] = {0};
4342         int status;
4343
4344         status = decode_op_hdr(xdr, OP_GETATTR);
4345         if (status < 0)
4346                 goto xdr_error;
4347
4348         status = decode_attr_bitmap(xdr, bitmap);
4349         if (status < 0)
4350                 goto xdr_error;
4351
4352         status = decode_attr_length(xdr, &attrlen, &savep);
4353         if (status < 0)
4354                 goto xdr_error;
4355
4356         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc, server);
4357         if (status < 0)
4358                 goto xdr_error;
4359
4360         status = verify_attr_len(xdr, savep, attrlen);
4361 xdr_error:
4362         dprintk("%s: xdr returned %d\n", __func__, -status);
4363         return status;
4364 }
4365
4366 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4367                 const struct nfs_server *server)
4368 {
4369         return decode_getfattr_generic(xdr, fattr, NULL, NULL, server);
4370 }
4371
4372 /*
4373  * Decode potentially multiple layout types. Currently we only support
4374  * one layout driver per file system.
4375  */
4376 static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4377                                          uint32_t *layouttype)
4378 {
4379         uint32_t *p;
4380         int num;
4381
4382         p = xdr_inline_decode(xdr, 4);
4383         if (unlikely(!p))
4384                 goto out_overflow;
4385         num = be32_to_cpup(p);
4386
4387         /* pNFS is not supported by the underlying file system */
4388         if (num == 0) {
4389                 *layouttype = 0;
4390                 return 0;
4391         }
4392         if (num > 1)
4393                 printk(KERN_INFO "NFS: %s: Warning: Multiple pNFS layout "
4394                         "drivers per filesystem not supported\n", __func__);
4395
4396         /* Decode and set first layout type, move xdr->p past unused types */
4397         p = xdr_inline_decode(xdr, num * 4);
4398         if (unlikely(!p))
4399                 goto out_overflow;
4400         *layouttype = be32_to_cpup(p);
4401         return 0;
4402 out_overflow:
4403         print_overflow_msg(__func__, xdr);
4404         return -EIO;
4405 }
4406
4407 /*
4408  * The type of file system exported.
4409  * Note we must ensure that layouttype is set in any non-error case.
4410  */
4411 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4412                                 uint32_t *layouttype)
4413 {
4414         int status = 0;
4415
4416         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4417         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4418                 return -EIO;
4419         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4420                 status = decode_first_pnfs_layout_type(xdr, layouttype);
4421                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4422         } else
4423                 *layouttype = 0;
4424         return status;
4425 }
4426
4427 /*
4428  * The prefered block size for layout directed io
4429  */
4430 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4431                                       uint32_t *res)
4432 {
4433         __be32 *p;
4434
4435         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4436         *res = 0;
4437         if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4438                 p = xdr_inline_decode(xdr, 4);
4439                 if (unlikely(!p)) {
4440                         print_overflow_msg(__func__, xdr);
4441                         return -EIO;
4442                 }
4443                 *res = be32_to_cpup(p);
4444                 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4445         }
4446         return 0;
4447 }
4448
4449 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4450 {
4451         __be32 *savep;
4452         uint32_t attrlen, bitmap[3];
4453         int status;
4454
4455         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4456                 goto xdr_error;
4457         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4458                 goto xdr_error;
4459         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4460                 goto xdr_error;
4461
4462         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4463
4464         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4465                 goto xdr_error;
4466         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4467                 goto xdr_error;
4468         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4469                 goto xdr_error;
4470         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4471         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4472                 goto xdr_error;
4473         fsinfo->wtpref = fsinfo->wtmax;
4474         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4475         if (status != 0)
4476                 goto xdr_error;
4477         status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4478         if (status != 0)
4479                 goto xdr_error;
4480         status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4481         if (status)
4482                 goto xdr_error;
4483
4484         status = verify_attr_len(xdr, savep, attrlen);
4485 xdr_error:
4486         dprintk("%s: xdr returned %d!\n", __func__, -status);
4487         return status;
4488 }
4489
4490 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4491 {
4492         __be32 *p;
4493         uint32_t len;
4494         int status;
4495
4496         /* Zero handle first to allow comparisons */
4497         memset(fh, 0, sizeof(*fh));
4498
4499         status = decode_op_hdr(xdr, OP_GETFH);
4500         if (status)
4501                 return status;
4502
4503         p = xdr_inline_decode(xdr, 4);
4504         if (unlikely(!p))
4505                 goto out_overflow;
4506         len = be32_to_cpup(p);
4507         if (len > NFS4_FHSIZE)
4508                 return -EIO;
4509         fh->size = len;
4510         p = xdr_inline_decode(xdr, len);
4511         if (unlikely(!p))
4512                 goto out_overflow;
4513         memcpy(fh->data, p, len);
4514         return 0;
4515 out_overflow:
4516         print_overflow_msg(__func__, xdr);
4517         return -EIO;
4518 }
4519
4520 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4521 {
4522         int status;
4523
4524         status = decode_op_hdr(xdr, OP_LINK);
4525         if (status)
4526                 return status;
4527         return decode_change_info(xdr, cinfo);
4528 }
4529
4530 /*
4531  * We create the owner, so we know a proper owner.id length is 4.
4532  */
4533 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4534 {
4535         uint64_t offset, length, clientid;
4536         __be32 *p;
4537         uint32_t namelen, type;
4538
4539         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4540         if (unlikely(!p))
4541                 goto out_overflow;
4542         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4543         p = xdr_decode_hyper(p, &length);
4544         type = be32_to_cpup(p++); /* 4 byte read */
4545         if (fl != NULL) { /* manipulate file lock */
4546                 fl->fl_start = (loff_t)offset;
4547                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4548                 if (length == ~(uint64_t)0)
4549                         fl->fl_end = OFFSET_MAX;
4550                 fl->fl_type = F_WRLCK;
4551                 if (type & 1)
4552                         fl->fl_type = F_RDLCK;
4553                 fl->fl_pid = 0;
4554         }
4555         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4556         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4557         p = xdr_inline_decode(xdr, namelen); /* variable size field */
4558         if (likely(p))
4559                 return -NFS4ERR_DENIED;
4560 out_overflow:
4561         print_overflow_msg(__func__, xdr);
4562         return -EIO;
4563 }
4564
4565 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4566 {
4567         int status;
4568
4569         status = decode_op_hdr(xdr, OP_LOCK);
4570         if (status == -EIO)
4571                 goto out;
4572         if (status == 0) {
4573                 status = decode_stateid(xdr, &res->stateid);
4574                 if (unlikely(status))
4575                         goto out;
4576         } else if (status == -NFS4ERR_DENIED)
4577                 status = decode_lock_denied(xdr, NULL);
4578         if (res->open_seqid != NULL)
4579                 nfs_increment_open_seqid(status, res->open_seqid);
4580         nfs_increment_lock_seqid(status, res->lock_seqid);
4581 out:
4582         return status;
4583 }
4584
4585 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4586 {
4587         int status;
4588         status = decode_op_hdr(xdr, OP_LOCKT);
4589         if (status == -NFS4ERR_DENIED)
4590                 return decode_lock_denied(xdr, res->denied);
4591         return status;
4592 }
4593
4594 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4595 {
4596         int status;
4597
4598         status = decode_op_hdr(xdr, OP_LOCKU);
4599         if (status != -EIO)
4600                 nfs_increment_lock_seqid(status, res->seqid);
4601         if (status == 0)
4602                 status = decode_stateid(xdr, &res->stateid);
4603         return status;
4604 }
4605
4606 static int decode_release_lockowner(struct xdr_stream *xdr)
4607 {
4608         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4609 }
4610
4611 static int decode_lookup(struct xdr_stream *xdr)
4612 {
4613         return decode_op_hdr(xdr, OP_LOOKUP);
4614 }
4615
4616 /* This is too sick! */
4617 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4618 {
4619         __be32 *p;
4620         uint32_t limit_type, nblocks, blocksize;
4621
4622         p = xdr_inline_decode(xdr, 12);
4623         if (unlikely(!p))
4624                 goto out_overflow;
4625         limit_type = be32_to_cpup(p++);
4626         switch (limit_type) {
4627         case 1:
4628                 xdr_decode_hyper(p, maxsize);
4629                 break;
4630         case 2:
4631                 nblocks = be32_to_cpup(p++);
4632                 blocksize = be32_to_cpup(p);
4633                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4634         }
4635         return 0;
4636 out_overflow:
4637         print_overflow_msg(__func__, xdr);
4638         return -EIO;
4639 }
4640
4641 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4642 {
4643         __be32 *p;
4644         uint32_t delegation_type;
4645         int status;
4646
4647         p = xdr_inline_decode(xdr, 4);
4648         if (unlikely(!p))
4649                 goto out_overflow;
4650         delegation_type = be32_to_cpup(p);
4651         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4652                 res->delegation_type = 0;
4653                 return 0;
4654         }
4655         status = decode_stateid(xdr, &res->delegation);
4656         if (unlikely(status))
4657                 return status;
4658         p = xdr_inline_decode(xdr, 4);
4659         if (unlikely(!p))
4660                 goto out_overflow;
4661         res->do_recall = be32_to_cpup(p);
4662
4663         switch (delegation_type) {
4664         case NFS4_OPEN_DELEGATE_READ:
4665                 res->delegation_type = FMODE_READ;
4666                 break;
4667         case NFS4_OPEN_DELEGATE_WRITE:
4668                 res->delegation_type = FMODE_WRITE|FMODE_READ;
4669                 if (decode_space_limit(xdr, &res->maxsize) < 0)
4670                                 return -EIO;
4671         }
4672         return decode_ace(xdr, NULL, res->server->nfs_client);
4673 out_overflow:
4674         print_overflow_msg(__func__, xdr);
4675         return -EIO;
4676 }
4677
4678 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
4679 {
4680         __be32 *p;
4681         uint32_t savewords, bmlen, i;
4682         int status;
4683
4684         status = decode_op_hdr(xdr, OP_OPEN);
4685         if (status != -EIO)
4686                 nfs_increment_open_seqid(status, res->seqid);
4687         if (!status)
4688                 status = decode_stateid(xdr, &res->stateid);
4689         if (unlikely(status))
4690                 return status;
4691
4692         decode_change_info(xdr, &res->cinfo);
4693
4694         p = xdr_inline_decode(xdr, 8);
4695         if (unlikely(!p))
4696                 goto out_overflow;
4697         res->rflags = be32_to_cpup(p++);
4698         bmlen = be32_to_cpup(p);
4699         if (bmlen > 10)
4700                 goto xdr_error;
4701
4702         p = xdr_inline_decode(xdr, bmlen << 2);
4703         if (unlikely(!p))
4704                 goto out_overflow;
4705         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
4706         for (i = 0; i < savewords; ++i)
4707                 res->attrset[i] = be32_to_cpup(p++);
4708         for (; i < NFS4_BITMAP_SIZE; i++)
4709                 res->attrset[i] = 0;
4710
4711         return decode_delegation(xdr, res);
4712 xdr_error:
4713         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
4714         return -EIO;
4715 out_overflow:
4716         print_overflow_msg(__func__, xdr);
4717         return -EIO;
4718 }
4719
4720 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
4721 {
4722         int status;
4723
4724         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
4725         if (status != -EIO)
4726                 nfs_increment_open_seqid(status, res->seqid);
4727         if (!status)
4728                 status = decode_stateid(xdr, &res->stateid);
4729         return status;
4730 }
4731
4732 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
4733 {
4734         int status;
4735
4736         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
4737         if (status != -EIO)
4738                 nfs_increment_open_seqid(status, res->seqid);
4739         if (!status)
4740                 status = decode_stateid(xdr, &res->stateid);
4741         return status;
4742 }
4743
4744 static int decode_putfh(struct xdr_stream *xdr)
4745 {
4746         return decode_op_hdr(xdr, OP_PUTFH);
4747 }
4748
4749 static int decode_putrootfh(struct xdr_stream *xdr)
4750 {
4751         return decode_op_hdr(xdr, OP_PUTROOTFH);
4752 }
4753
4754 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
4755 {
4756         struct kvec *iov = req->rq_rcv_buf.head;
4757         __be32 *p;
4758         uint32_t count, eof, recvd, hdrlen;
4759         int status;
4760
4761         status = decode_op_hdr(xdr, OP_READ);
4762         if (status)
4763                 return status;
4764         p = xdr_inline_decode(xdr, 8);
4765         if (unlikely(!p))
4766                 goto out_overflow;
4767         eof = be32_to_cpup(p++);
4768         count = be32_to_cpup(p);
4769         hdrlen = (u8 *) xdr->p - (u8 *) iov->iov_base;
4770         recvd = req->rq_rcv_buf.len - hdrlen;
4771         if (count > recvd) {
4772                 dprintk("NFS: server cheating in read reply: "
4773                                 "count %u > recvd %u\n", count, recvd);
4774                 count = recvd;
4775                 eof = 0;
4776         }
4777         xdr_read_pages(xdr, count);
4778         res->eof = eof;
4779         res->count = count;
4780         return 0;
4781 out_overflow:
4782         print_overflow_msg(__func__, xdr);
4783         return -EIO;
4784 }
4785
4786 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
4787 {
4788         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
4789         struct kvec     *iov = rcvbuf->head;
4790         size_t          hdrlen;
4791         u32             recvd, pglen = rcvbuf->page_len;
4792         int             status;
4793         __be32          verf[2];
4794
4795         status = decode_op_hdr(xdr, OP_READDIR);
4796         if (!status)
4797                 status = decode_verifier(xdr, readdir->verifier.data);
4798         if (unlikely(status))
4799                 return status;
4800         memcpy(verf, readdir->verifier.data, sizeof(verf));
4801         dprintk("%s: verifier = %08x:%08x\n",
4802                         __func__, verf[0], verf[1]);
4803
4804         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4805         recvd = rcvbuf->len - hdrlen;
4806         if (pglen > recvd)
4807                 pglen = recvd;
4808         xdr_read_pages(xdr, pglen);
4809
4810
4811         return pglen;
4812 }
4813
4814 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
4815 {
4816         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4817         struct kvec *iov = rcvbuf->head;
4818         size_t hdrlen;
4819         u32 len, recvd;
4820         __be32 *p;
4821         int status;
4822
4823         status = decode_op_hdr(xdr, OP_READLINK);
4824         if (status)
4825                 return status;
4826
4827         /* Convert length of symlink */
4828         p = xdr_inline_decode(xdr, 4);
4829         if (unlikely(!p))
4830                 goto out_overflow;
4831         len = be32_to_cpup(p);
4832         if (len >= rcvbuf->page_len || len <= 0) {
4833                 dprintk("nfs: server returned giant symlink!\n");
4834                 return -ENAMETOOLONG;
4835         }
4836         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4837         recvd = req->rq_rcv_buf.len - hdrlen;
4838         if (recvd < len) {
4839                 dprintk("NFS: server cheating in readlink reply: "
4840                                 "count %u > recvd %u\n", len, recvd);
4841                 return -EIO;
4842         }
4843         xdr_read_pages(xdr, len);
4844         /*
4845          * The XDR encode routine has set things up so that
4846          * the link text will be copied directly into the
4847          * buffer.  We just have to do overflow-checking,
4848          * and and null-terminate the text (the VFS expects
4849          * null-termination).
4850          */
4851         xdr_terminate_string(rcvbuf, len);
4852         return 0;
4853 out_overflow:
4854         print_overflow_msg(__func__, xdr);
4855         return -EIO;
4856 }
4857
4858 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4859 {
4860         int status;
4861
4862         status = decode_op_hdr(xdr, OP_REMOVE);
4863         if (status)
4864                 goto out;
4865         status = decode_change_info(xdr, cinfo);
4866 out:
4867         return status;
4868 }
4869
4870 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
4871               struct nfs4_change_info *new_cinfo)
4872 {
4873         int status;
4874
4875         status = decode_op_hdr(xdr, OP_RENAME);
4876         if (status)
4877                 goto out;
4878         if ((status = decode_change_info(xdr, old_cinfo)))
4879                 goto out;
4880         status = decode_change_info(xdr, new_cinfo);
4881 out:
4882         return status;
4883 }
4884
4885 static int decode_renew(struct xdr_stream *xdr)
4886 {
4887         return decode_op_hdr(xdr, OP_RENEW);
4888 }
4889
4890 static int
4891 decode_restorefh(struct xdr_stream *xdr)
4892 {
4893         return decode_op_hdr(xdr, OP_RESTOREFH);
4894 }
4895
4896 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
4897                          struct nfs_getaclres *res)
4898 {
4899         __be32 *savep, *bm_p;
4900         uint32_t attrlen,
4901                  bitmap[3] = {0};
4902         struct kvec *iov = req->rq_rcv_buf.head;
4903         int status;
4904
4905         res->acl_len = 0;
4906         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4907                 goto out;
4908         bm_p = xdr->p;
4909         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4910                 goto out;
4911         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4912                 goto out;
4913
4914         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
4915                 return -EIO;
4916         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
4917                 size_t hdrlen;
4918                 u32 recvd;
4919
4920                 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
4921                  * are stored with the acl data to handle the problem of
4922                  * variable length bitmaps.*/
4923                 xdr->p = bm_p;
4924                 res->acl_data_offset = be32_to_cpup(bm_p) + 2;
4925                 res->acl_data_offset <<= 2;
4926
4927                 /* We ignore &savep and don't do consistency checks on
4928                  * the attr length.  Let userspace figure it out.... */
4929                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
4930                 attrlen += res->acl_data_offset;
4931                 recvd = req->rq_rcv_buf.len - hdrlen;
4932                 if (attrlen > recvd) {
4933                         if (res->acl_flags & NFS4_ACL_LEN_REQUEST) {
4934                                 /* getxattr interface called with a NULL buf */
4935                                 res->acl_len = attrlen;
4936                                 goto out;
4937                         }
4938                         dprintk("NFS: acl reply: attrlen %u > recvd %u\n",
4939                                         attrlen, recvd);
4940                         return -EINVAL;
4941                 }
4942                 xdr_read_pages(xdr, attrlen);
4943                 res->acl_len = attrlen;
4944         } else
4945                 status = -EOPNOTSUPP;
4946
4947 out:
4948         return status;
4949 }
4950
4951 static int
4952 decode_savefh(struct xdr_stream *xdr)
4953 {
4954         return decode_op_hdr(xdr, OP_SAVEFH);
4955 }
4956
4957 static int decode_setattr(struct xdr_stream *xdr)
4958 {
4959         __be32 *p;
4960         uint32_t bmlen;
4961         int status;
4962
4963         status = decode_op_hdr(xdr, OP_SETATTR);
4964         if (status)
4965                 return status;
4966         p = xdr_inline_decode(xdr, 4);
4967         if (unlikely(!p))
4968                 goto out_overflow;
4969         bmlen = be32_to_cpup(p);
4970         p = xdr_inline_decode(xdr, bmlen << 2);
4971         if (likely(p))
4972                 return 0;
4973 out_overflow:
4974         print_overflow_msg(__func__, xdr);
4975         return -EIO;
4976 }
4977
4978 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
4979 {
4980         __be32 *p;
4981         uint32_t opnum;
4982         int32_t nfserr;
4983
4984         p = xdr_inline_decode(xdr, 8);
4985         if (unlikely(!p))
4986                 goto out_overflow;
4987         opnum = be32_to_cpup(p++);
4988         if (opnum != OP_SETCLIENTID) {
4989                 dprintk("nfs: decode_setclientid: Server returned operation"
4990                         " %d\n", opnum);
4991                 return -EIO;
4992         }
4993         nfserr = be32_to_cpup(p);
4994         if (nfserr == NFS_OK) {
4995                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
4996                 if (unlikely(!p))
4997                         goto out_overflow;
4998                 p = xdr_decode_hyper(p, &res->clientid);
4999                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5000         } else if (nfserr == NFSERR_CLID_INUSE) {
5001                 uint32_t len;
5002
5003                 /* skip netid string */
5004                 p = xdr_inline_decode(xdr, 4);
5005                 if (unlikely(!p))
5006                         goto out_overflow;
5007                 len = be32_to_cpup(p);
5008                 p = xdr_inline_decode(xdr, len);
5009                 if (unlikely(!p))
5010                         goto out_overflow;
5011
5012                 /* skip uaddr string */
5013                 p = xdr_inline_decode(xdr, 4);
5014                 if (unlikely(!p))
5015                         goto out_overflow;
5016                 len = be32_to_cpup(p);
5017                 p = xdr_inline_decode(xdr, len);
5018                 if (unlikely(!p))
5019                         goto out_overflow;
5020                 return -NFSERR_CLID_INUSE;
5021         } else
5022                 return nfs4_stat_to_errno(nfserr);
5023
5024         return 0;
5025 out_overflow:
5026         print_overflow_msg(__func__, xdr);
5027         return -EIO;
5028 }
5029
5030 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5031 {
5032         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5033 }
5034
5035 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
5036 {
5037         __be32 *p;
5038         int status;
5039
5040         status = decode_op_hdr(xdr, OP_WRITE);
5041         if (status)
5042                 return status;
5043
5044         p = xdr_inline_decode(xdr, 16);
5045         if (unlikely(!p))
5046                 goto out_overflow;
5047         res->count = be32_to_cpup(p++);
5048         res->verf->committed = be32_to_cpup(p++);
5049         memcpy(res->verf->verifier, p, NFS4_VERIFIER_SIZE);
5050         return 0;
5051 out_overflow:
5052         print_overflow_msg(__func__, xdr);
5053         return -EIO;
5054 }
5055
5056 static int decode_delegreturn(struct xdr_stream *xdr)
5057 {
5058         return decode_op_hdr(xdr, OP_DELEGRETURN);
5059 }
5060
5061 static int decode_secinfo_gss(struct xdr_stream *xdr, struct nfs4_secinfo_flavor *flavor)
5062 {
5063         __be32 *p;
5064
5065         p = xdr_inline_decode(xdr, 4);
5066         if (unlikely(!p))
5067                 goto out_overflow;
5068         flavor->gss.sec_oid4.len = be32_to_cpup(p);
5069         if (flavor->gss.sec_oid4.len > GSS_OID_MAX_LEN)
5070                 goto out_err;
5071
5072         p = xdr_inline_decode(xdr, flavor->gss.sec_oid4.len);
5073         if (unlikely(!p))
5074                 goto out_overflow;
5075         memcpy(flavor->gss.sec_oid4.data, p, flavor->gss.sec_oid4.len);
5076
5077         p = xdr_inline_decode(xdr, 8);
5078         if (unlikely(!p))
5079                 goto out_overflow;
5080         flavor->gss.qop4 = be32_to_cpup(p++);
5081         flavor->gss.service = be32_to_cpup(p);
5082
5083         return 0;
5084
5085 out_overflow:
5086         print_overflow_msg(__func__, xdr);
5087         return -EIO;
5088 out_err:
5089         return -EINVAL;
5090 }
5091
5092 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5093 {
5094         struct nfs4_secinfo_flavor *sec_flavor;
5095         int status;
5096         __be32 *p;
5097         int i, num_flavors;
5098
5099         status = decode_op_hdr(xdr, OP_SECINFO);
5100         if (status)
5101                 goto out;
5102         p = xdr_inline_decode(xdr, 4);
5103         if (unlikely(!p))
5104                 goto out_overflow;
5105
5106         res->flavors->num_flavors = 0;
5107         num_flavors = be32_to_cpup(p);
5108
5109         for (i = 0; i < num_flavors; i++) {
5110                 sec_flavor = &res->flavors->flavors[i];
5111                 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5112                         break;
5113
5114                 p = xdr_inline_decode(xdr, 4);
5115                 if (unlikely(!p))
5116                         goto out_overflow;
5117                 sec_flavor->flavor = be32_to_cpup(p);
5118
5119                 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5120                         status = decode_secinfo_gss(xdr, sec_flavor);
5121                         if (status)
5122                                 goto out;
5123                 }
5124                 res->flavors->num_flavors++;
5125         }
5126
5127 out:
5128         return status;
5129 out_overflow:
5130         print_overflow_msg(__func__, xdr);
5131         return -EIO;
5132 }
5133
5134 #if defined(CONFIG_NFS_V4_1)
5135 static int decode_exchange_id(struct xdr_stream *xdr,
5136                               struct nfs41_exchange_id_res *res)
5137 {
5138         __be32 *p;
5139         uint32_t dummy;
5140         char *dummy_str;
5141         int status;
5142         struct nfs_client *clp = res->client;
5143         uint32_t impl_id_count;
5144
5145         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5146         if (status)
5147                 return status;
5148
5149         p = xdr_inline_decode(xdr, 8);
5150         if (unlikely(!p))
5151                 goto out_overflow;
5152         xdr_decode_hyper(p, &clp->cl_clientid);
5153         p = xdr_inline_decode(xdr, 12);
5154         if (unlikely(!p))
5155                 goto out_overflow;
5156         clp->cl_seqid = be32_to_cpup(p++);
5157         clp->cl_exchange_flags = be32_to_cpup(p++);
5158
5159         /* We ask for SP4_NONE */
5160         dummy = be32_to_cpup(p);
5161         if (dummy != SP4_NONE)
5162                 return -EIO;
5163
5164         /* Throw away minor_id */
5165         p = xdr_inline_decode(xdr, 8);
5166         if (unlikely(!p))
5167                 goto out_overflow;
5168
5169         /* Throw away Major id */
5170         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5171         if (unlikely(status))
5172                 return status;
5173
5174         /* Save server_scope */
5175         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5176         if (unlikely(status))
5177                 return status;
5178
5179         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5180                 return -EIO;
5181
5182         memcpy(res->server_scope->server_scope, dummy_str, dummy);
5183         res->server_scope->server_scope_sz = dummy;
5184
5185         /* Implementation Id */
5186         p = xdr_inline_decode(xdr, 4);
5187         if (unlikely(!p))
5188                 goto out_overflow;
5189         impl_id_count = be32_to_cpup(p++);
5190
5191         if (impl_id_count) {
5192                 /* nii_domain */
5193                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5194                 if (unlikely(status))
5195                         return status;
5196                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5197                         return -EIO;
5198                 memcpy(res->impl_id->domain, dummy_str, dummy);
5199
5200                 /* nii_name */
5201                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5202                 if (unlikely(status))
5203                         return status;
5204                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5205                         return -EIO;
5206                 memcpy(res->impl_id->name, dummy_str, dummy);
5207
5208                 /* nii_date */
5209                 p = xdr_inline_decode(xdr, 12);
5210                 if (unlikely(!p))
5211                         goto out_overflow;
5212                 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5213                 res->impl_id->date.nseconds = be32_to_cpup(p);
5214
5215                 /* if there's more than one entry, ignore the rest */
5216         }
5217         return 0;
5218 out_overflow:
5219         print_overflow_msg(__func__, xdr);
5220         return -EIO;
5221 }
5222
5223 static int decode_chan_attrs(struct xdr_stream *xdr,
5224                              struct nfs4_channel_attrs *attrs)
5225 {
5226         __be32 *p;
5227         u32 nr_attrs, val;
5228
5229         p = xdr_inline_decode(xdr, 28);
5230         if (unlikely(!p))
5231                 goto out_overflow;
5232         val = be32_to_cpup(p++);        /* headerpadsz */
5233         if (val)
5234                 return -EINVAL;         /* no support for header padding yet */
5235         attrs->max_rqst_sz = be32_to_cpup(p++);
5236         attrs->max_resp_sz = be32_to_cpup(p++);
5237         attrs->max_resp_sz_cached = be32_to_cpup(p++);
5238         attrs->max_ops = be32_to_cpup(p++);
5239         attrs->max_reqs = be32_to_cpup(p++);
5240         nr_attrs = be32_to_cpup(p);
5241         if (unlikely(nr_attrs > 1)) {
5242                 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5243                         "count %u\n", __func__, nr_attrs);
5244                 return -EINVAL;
5245         }
5246         if (nr_attrs == 1) {
5247                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5248                 if (unlikely(!p))
5249                         goto out_overflow;
5250         }
5251         return 0;
5252 out_overflow:
5253         print_overflow_msg(__func__, xdr);
5254         return -EIO;
5255 }
5256
5257 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5258 {
5259         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5260 }
5261
5262 static int decode_create_session(struct xdr_stream *xdr,
5263                                  struct nfs41_create_session_res *res)
5264 {
5265         __be32 *p;
5266         int status;
5267         struct nfs_client *clp = res->client;
5268         struct nfs4_session *session = clp->cl_session;
5269
5270         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5271         if (!status)
5272                 status = decode_sessionid(xdr, &session->sess_id);
5273         if (unlikely(status))
5274                 return status;
5275
5276         /* seqid, flags */
5277         p = xdr_inline_decode(xdr, 8);
5278         if (unlikely(!p))
5279                 goto out_overflow;
5280         clp->cl_seqid = be32_to_cpup(p++);
5281         session->flags = be32_to_cpup(p);
5282
5283         /* Channel attributes */
5284         status = decode_chan_attrs(xdr, &session->fc_attrs);
5285         if (!status)
5286                 status = decode_chan_attrs(xdr, &session->bc_attrs);
5287         return status;
5288 out_overflow:
5289         print_overflow_msg(__func__, xdr);
5290         return -EIO;
5291 }
5292
5293 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5294 {
5295         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5296 }
5297
5298 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5299 {
5300         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5301 }
5302 #endif /* CONFIG_NFS_V4_1 */
5303
5304 static int decode_sequence(struct xdr_stream *xdr,
5305                            struct nfs4_sequence_res *res,
5306                            struct rpc_rqst *rqstp)
5307 {
5308 #if defined(CONFIG_NFS_V4_1)
5309         struct nfs4_sessionid id;
5310         u32 dummy;
5311         int status;
5312         __be32 *p;
5313
5314         if (!res->sr_session)
5315                 return 0;
5316
5317         status = decode_op_hdr(xdr, OP_SEQUENCE);
5318         if (!status)
5319                 status = decode_sessionid(xdr, &id);
5320         if (unlikely(status))
5321                 goto out_err;
5322
5323         /*
5324          * If the server returns different values for sessionID, slotID or
5325          * sequence number, the server is looney tunes.
5326          */
5327         status = -EREMOTEIO;
5328
5329         if (memcmp(id.data, res->sr_session->sess_id.data,
5330                    NFS4_MAX_SESSIONID_LEN)) {
5331                 dprintk("%s Invalid session id\n", __func__);
5332                 goto out_err;
5333         }
5334
5335         p = xdr_inline_decode(xdr, 20);
5336         if (unlikely(!p))
5337                 goto out_overflow;
5338
5339         /* seqid */
5340         dummy = be32_to_cpup(p++);
5341         if (dummy != res->sr_slot->seq_nr) {
5342                 dprintk("%s Invalid sequence number\n", __func__);
5343                 goto out_err;
5344         }
5345         /* slot id */
5346         dummy = be32_to_cpup(p++);
5347         if (dummy != res->sr_slot - res->sr_session->fc_slot_table.slots) {
5348                 dprintk("%s Invalid slot id\n", __func__);
5349                 goto out_err;
5350         }
5351         /* highest slot id - currently not processed */
5352         dummy = be32_to_cpup(p++);
5353         /* target highest slot id - currently not processed */
5354         dummy = be32_to_cpup(p++);
5355         /* result flags */
5356         res->sr_status_flags = be32_to_cpup(p);
5357         status = 0;
5358 out_err:
5359         res->sr_status = status;
5360         return status;
5361 out_overflow:
5362         print_overflow_msg(__func__, xdr);
5363         status = -EIO;
5364         goto out_err;
5365 #else  /* CONFIG_NFS_V4_1 */
5366         return 0;
5367 #endif /* CONFIG_NFS_V4_1 */
5368 }
5369
5370 #if defined(CONFIG_NFS_V4_1)
5371 /*
5372  * TODO: Need to handle case when EOF != true;
5373  */
5374 static int decode_getdevicelist(struct xdr_stream *xdr,
5375                                 struct pnfs_devicelist *res)
5376 {
5377         __be32 *p;
5378         int status, i;
5379         struct nfs_writeverf verftemp;
5380
5381         status = decode_op_hdr(xdr, OP_GETDEVICELIST);
5382         if (status)
5383                 return status;
5384
5385         p = xdr_inline_decode(xdr, 8 + 8 + 4);
5386         if (unlikely(!p))
5387                 goto out_overflow;
5388
5389         /* TODO: Skip cookie for now */
5390         p += 2;
5391
5392         /* Read verifier */
5393         p = xdr_decode_opaque_fixed(p, verftemp.verifier, NFS4_VERIFIER_SIZE);
5394
5395         res->num_devs = be32_to_cpup(p);
5396
5397         dprintk("%s: num_dev %d\n", __func__, res->num_devs);
5398
5399         if (res->num_devs > NFS4_PNFS_GETDEVLIST_MAXNUM) {
5400                 printk(KERN_ERR "NFS: %s too many result dev_num %u\n",
5401                                 __func__, res->num_devs);
5402                 return -EIO;
5403         }
5404
5405         p = xdr_inline_decode(xdr,
5406                               res->num_devs * NFS4_DEVICEID4_SIZE + 4);
5407         if (unlikely(!p))
5408                 goto out_overflow;
5409         for (i = 0; i < res->num_devs; i++)
5410                 p = xdr_decode_opaque_fixed(p, res->dev_id[i].data,
5411                                             NFS4_DEVICEID4_SIZE);
5412         res->eof = be32_to_cpup(p);
5413         return 0;
5414 out_overflow:
5415         print_overflow_msg(__func__, xdr);
5416         return -EIO;
5417 }
5418
5419 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5420                                 struct pnfs_device *pdev)
5421 {
5422         __be32 *p;
5423         uint32_t len, type;
5424         int status;
5425
5426         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5427         if (status) {
5428                 if (status == -ETOOSMALL) {
5429                         p = xdr_inline_decode(xdr, 4);
5430                         if (unlikely(!p))
5431                                 goto out_overflow;
5432                         pdev->mincount = be32_to_cpup(p);
5433                         dprintk("%s: Min count too small. mincnt = %u\n",
5434                                 __func__, pdev->mincount);
5435                 }
5436                 return status;
5437         }
5438
5439         p = xdr_inline_decode(xdr, 8);
5440         if (unlikely(!p))
5441                 goto out_overflow;
5442         type = be32_to_cpup(p++);
5443         if (type != pdev->layout_type) {
5444                 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5445                         __func__, pdev->layout_type, type);
5446                 return -EINVAL;
5447         }
5448         /*
5449          * Get the length of the opaque device_addr4. xdr_read_pages places
5450          * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5451          * and places the remaining xdr data in xdr_buf->tail
5452          */
5453         pdev->mincount = be32_to_cpup(p);
5454         xdr_read_pages(xdr, pdev->mincount); /* include space for the length */
5455
5456         /* Parse notification bitmap, verifying that it is zero. */
5457         p = xdr_inline_decode(xdr, 4);
5458         if (unlikely(!p))
5459                 goto out_overflow;
5460         len = be32_to_cpup(p);
5461         if (len) {
5462                 uint32_t i;
5463
5464                 p = xdr_inline_decode(xdr, 4 * len);
5465                 if (unlikely(!p))
5466                         goto out_overflow;
5467                 for (i = 0; i < len; i++, p++) {
5468                         if (be32_to_cpup(p)) {
5469                                 dprintk("%s: notifications not supported\n",
5470                                         __func__);
5471                                 return -EIO;
5472                         }
5473                 }
5474         }
5475         return 0;
5476 out_overflow:
5477         print_overflow_msg(__func__, xdr);
5478         return -EIO;
5479 }
5480
5481 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5482                             struct nfs4_layoutget_res *res)
5483 {
5484         __be32 *p;
5485         int status;
5486         u32 layout_count;
5487         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5488         struct kvec *iov = rcvbuf->head;
5489         u32 hdrlen, recvd;
5490
5491         status = decode_op_hdr(xdr, OP_LAYOUTGET);
5492         if (status)
5493                 return status;
5494         p = xdr_inline_decode(xdr, 4);
5495         if (unlikely(!p))
5496                 goto out_overflow;
5497         res->return_on_close = be32_to_cpup(p);
5498         decode_stateid(xdr, &res->stateid);
5499         p = xdr_inline_decode(xdr, 4);
5500         if (unlikely(!p))
5501                 goto out_overflow;
5502         layout_count = be32_to_cpup(p);
5503         if (!layout_count) {
5504                 dprintk("%s: server responded with empty layout array\n",
5505                         __func__);
5506                 return -EINVAL;
5507         }
5508
5509         p = xdr_inline_decode(xdr, 28);
5510         if (unlikely(!p))
5511                 goto out_overflow;
5512         p = xdr_decode_hyper(p, &res->range.offset);
5513         p = xdr_decode_hyper(p, &res->range.length);
5514         res->range.iomode = be32_to_cpup(p++);
5515         res->type = be32_to_cpup(p++);
5516         res->layoutp->len = be32_to_cpup(p);
5517
5518         dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5519                 __func__,
5520                 (unsigned long)res->range.offset,
5521                 (unsigned long)res->range.length,
5522                 res->range.iomode,
5523                 res->type,
5524                 res->layoutp->len);
5525
5526         hdrlen = (u8 *) xdr->p - (u8 *) iov->iov_base;
5527         recvd = req->rq_rcv_buf.len - hdrlen;
5528         if (res->layoutp->len > recvd) {
5529                 dprintk("NFS: server cheating in layoutget reply: "
5530                                 "layout len %u > recvd %u\n",
5531                                 res->layoutp->len, recvd);
5532                 return -EINVAL;
5533         }
5534
5535         xdr_read_pages(xdr, res->layoutp->len);
5536
5537         if (layout_count > 1) {
5538                 /* We only handle a length one array at the moment.  Any
5539                  * further entries are just ignored.  Note that this means
5540                  * the client may see a response that is less than the
5541                  * minimum it requested.
5542                  */
5543                 dprintk("%s: server responded with %d layouts, dropping tail\n",
5544                         __func__, layout_count);
5545         }
5546
5547         return 0;
5548 out_overflow:
5549         print_overflow_msg(__func__, xdr);
5550         return -EIO;
5551 }
5552
5553 static int decode_layoutreturn(struct xdr_stream *xdr,
5554                                struct nfs4_layoutreturn_res *res)
5555 {
5556         __be32 *p;
5557         int status;
5558
5559         status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5560         if (status)
5561                 return status;
5562         p = xdr_inline_decode(xdr, 4);
5563         if (unlikely(!p))
5564                 goto out_overflow;
5565         res->lrs_present = be32_to_cpup(p);
5566         if (res->lrs_present)
5567                 status = decode_stateid(xdr, &res->stateid);
5568         return status;
5569 out_overflow:
5570         print_overflow_msg(__func__, xdr);
5571         return -EIO;
5572 }
5573
5574 static int decode_layoutcommit(struct xdr_stream *xdr,
5575                                struct rpc_rqst *req,
5576                                struct nfs4_layoutcommit_res *res)
5577 {
5578         __be32 *p;
5579         __u32 sizechanged;
5580         int status;
5581
5582         status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5583         res->status = status;
5584         if (status)
5585                 return status;
5586
5587         p = xdr_inline_decode(xdr, 4);
5588         if (unlikely(!p))
5589                 goto out_overflow;
5590         sizechanged = be32_to_cpup(p);
5591
5592         if (sizechanged) {
5593                 /* throw away new size */
5594                 p = xdr_inline_decode(xdr, 8);
5595                 if (unlikely(!p))
5596                         goto out_overflow;
5597         }
5598         return 0;
5599 out_overflow:
5600         print_overflow_msg(__func__, xdr);
5601         return -EIO;
5602 }
5603
5604 static int decode_test_stateid(struct xdr_stream *xdr,
5605                                struct nfs41_test_stateid_res *res)
5606 {
5607         __be32 *p;
5608         int status;
5609         int num_res;
5610
5611         status = decode_op_hdr(xdr, OP_TEST_STATEID);
5612         if (status)
5613                 return status;
5614
5615         p = xdr_inline_decode(xdr, 4);
5616         if (unlikely(!p))
5617                 goto out_overflow;
5618         num_res = be32_to_cpup(p++);
5619         if (num_res != 1)
5620                 goto out;
5621
5622         p = xdr_inline_decode(xdr, 4);
5623         if (unlikely(!p))
5624                 goto out_overflow;
5625         res->status = be32_to_cpup(p++);
5626
5627         return status;
5628 out_overflow:
5629         print_overflow_msg(__func__, xdr);
5630 out:
5631         return -EIO;
5632 }
5633
5634 static int decode_free_stateid(struct xdr_stream *xdr,
5635                                struct nfs41_free_stateid_res *res)
5636 {
5637         __be32 *p;
5638         int status;
5639
5640         status = decode_op_hdr(xdr, OP_FREE_STATEID);
5641         if (status)
5642                 return status;
5643
5644         p = xdr_inline_decode(xdr, 4);
5645         if (unlikely(!p))
5646                 goto out_overflow;
5647         res->status = be32_to_cpup(p++);
5648         return res->status;
5649 out_overflow:
5650         print_overflow_msg(__func__, xdr);
5651         return -EIO;
5652 }
5653 #endif /* CONFIG_NFS_V4_1 */
5654
5655 /*
5656  * END OF "GENERIC" DECODE ROUTINES.
5657  */
5658
5659 /*
5660  * Decode OPEN_DOWNGRADE response
5661  */
5662 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
5663                                        struct xdr_stream *xdr,
5664                                        struct nfs_closeres *res)
5665 {
5666         struct compound_hdr hdr;
5667         int status;
5668
5669         status = decode_compound_hdr(xdr, &hdr);
5670         if (status)
5671                 goto out;
5672         status = decode_sequence(xdr, &res->seq_res, rqstp);
5673         if (status)
5674                 goto out;
5675         status = decode_putfh(xdr);
5676         if (status)
5677                 goto out;
5678         status = decode_open_downgrade(xdr, res);
5679         if (status != 0)
5680                 goto out;
5681         decode_getfattr(xdr, res->fattr, res->server);
5682 out:
5683         return status;
5684 }
5685
5686 /*
5687  * Decode ACCESS response
5688  */
5689 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5690                                struct nfs4_accessres *res)
5691 {
5692         struct compound_hdr hdr;
5693         int status;
5694
5695         status = decode_compound_hdr(xdr, &hdr);
5696         if (status)
5697                 goto out;
5698         status = decode_sequence(xdr, &res->seq_res, rqstp);
5699         if (status)
5700                 goto out;
5701         status = decode_putfh(xdr);
5702         if (status != 0)
5703                 goto out;
5704         status = decode_access(xdr, res);
5705         if (status != 0)
5706                 goto out;
5707         decode_getfattr(xdr, res->fattr, res->server);
5708 out:
5709         return status;
5710 }
5711
5712 /*
5713  * Decode LOOKUP response
5714  */
5715 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5716                                struct nfs4_lookup_res *res)
5717 {
5718         struct compound_hdr hdr;
5719         int status;
5720
5721         status = decode_compound_hdr(xdr, &hdr);
5722         if (status)
5723                 goto out;
5724         status = decode_sequence(xdr, &res->seq_res, rqstp);
5725         if (status)
5726                 goto out;
5727         status = decode_putfh(xdr);
5728         if (status)
5729                 goto out;
5730         status = decode_lookup(xdr);
5731         if (status)
5732                 goto out;
5733         status = decode_getfh(xdr, res->fh);
5734         if (status)
5735                 goto out;
5736         status = decode_getfattr(xdr, res->fattr, res->server);
5737 out:
5738         return status;
5739 }
5740
5741 /*
5742  * Decode LOOKUP_ROOT response
5743  */
5744 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
5745                                     struct xdr_stream *xdr,
5746                                     struct nfs4_lookup_res *res)
5747 {
5748         struct compound_hdr hdr;
5749         int status;
5750
5751         status = decode_compound_hdr(xdr, &hdr);
5752         if (status)
5753                 goto out;
5754         status = decode_sequence(xdr, &res->seq_res, rqstp);
5755         if (status)
5756                 goto out;
5757         status = decode_putrootfh(xdr);
5758         if (status)
5759                 goto out;
5760         status = decode_getfh(xdr, res->fh);
5761         if (status == 0)
5762                 status = decode_getfattr(xdr, res->fattr, res->server);
5763 out:
5764         return status;
5765 }
5766
5767 /*
5768  * Decode REMOVE response
5769  */
5770 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5771                                struct nfs_removeres *res)
5772 {
5773         struct compound_hdr hdr;
5774         int status;
5775
5776         status = decode_compound_hdr(xdr, &hdr);
5777         if (status)
5778                 goto out;
5779         status = decode_sequence(xdr, &res->seq_res, rqstp);
5780         if (status)
5781                 goto out;
5782         status = decode_putfh(xdr);
5783         if (status)
5784                 goto out;
5785         status = decode_remove(xdr, &res->cinfo);
5786         if (status)
5787                 goto out;
5788         decode_getfattr(xdr, res->dir_attr, res->server);
5789 out:
5790         return status;
5791 }
5792
5793 /*
5794  * Decode RENAME response
5795  */
5796 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5797                                struct nfs_renameres *res)
5798 {
5799         struct compound_hdr hdr;
5800         int status;
5801
5802         status = decode_compound_hdr(xdr, &hdr);
5803         if (status)
5804                 goto out;
5805         status = decode_sequence(xdr, &res->seq_res, rqstp);
5806         if (status)
5807                 goto out;
5808         status = decode_putfh(xdr);
5809         if (status)
5810                 goto out;
5811         status = decode_savefh(xdr);
5812         if (status)
5813                 goto out;
5814         status = decode_putfh(xdr);
5815         if (status)
5816                 goto out;
5817         status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
5818         if (status)
5819                 goto out;
5820         /* Current FH is target directory */
5821         if (decode_getfattr(xdr, res->new_fattr, res->server))
5822                 goto out;
5823         status = decode_restorefh(xdr);
5824         if (status)
5825                 goto out;
5826         decode_getfattr(xdr, res->old_fattr, res->server);
5827 out:
5828         return status;
5829 }
5830
5831 /*
5832  * Decode LINK response
5833  */
5834 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5835                              struct nfs4_link_res *res)
5836 {
5837         struct compound_hdr hdr;
5838         int status;
5839
5840         status = decode_compound_hdr(xdr, &hdr);
5841         if (status)
5842                 goto out;
5843         status = decode_sequence(xdr, &res->seq_res, rqstp);
5844         if (status)
5845                 goto out;
5846         status = decode_putfh(xdr);
5847         if (status)
5848                 goto out;
5849         status = decode_savefh(xdr);
5850         if (status)
5851                 goto out;
5852         status = decode_putfh(xdr);
5853         if (status)
5854                 goto out;
5855         status = decode_link(xdr, &res->cinfo);
5856         if (status)
5857                 goto out;
5858         /*
5859          * Note order: OP_LINK leaves the directory as the current
5860          *             filehandle.
5861          */
5862         if (decode_getfattr(xdr, res->dir_attr, res->server))
5863                 goto out;
5864         status = decode_restorefh(xdr);
5865         if (status)
5866                 goto out;
5867         decode_getfattr(xdr, res->fattr, res->server);
5868 out:
5869         return status;
5870 }
5871
5872 /*
5873  * Decode CREATE response
5874  */
5875 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5876                                struct nfs4_create_res *res)
5877 {
5878         struct compound_hdr hdr;
5879         int status;
5880
5881         status = decode_compound_hdr(xdr, &hdr);
5882         if (status)
5883                 goto out;
5884         status = decode_sequence(xdr, &res->seq_res, rqstp);
5885         if (status)
5886                 goto out;
5887         status = decode_putfh(xdr);
5888         if (status)
5889                 goto out;
5890         status = decode_savefh(xdr);
5891         if (status)
5892                 goto out;
5893         status = decode_create(xdr, &res->dir_cinfo);
5894         if (status)
5895                 goto out;
5896         status = decode_getfh(xdr, res->fh);
5897         if (status)
5898                 goto out;
5899         if (decode_getfattr(xdr, res->fattr, res->server))
5900                 goto out;
5901         status = decode_restorefh(xdr);
5902         if (status)
5903                 goto out;
5904         decode_getfattr(xdr, res->dir_fattr, res->server);
5905 out:
5906         return status;
5907 }
5908
5909 /*
5910  * Decode SYMLINK response
5911  */
5912 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5913                                 struct nfs4_create_res *res)
5914 {
5915         return nfs4_xdr_dec_create(rqstp, xdr, res);
5916 }
5917
5918 /*
5919  * Decode GETATTR response
5920  */
5921 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5922                                 struct nfs4_getattr_res *res)
5923 {
5924         struct compound_hdr hdr;
5925         int status;
5926
5927         status = decode_compound_hdr(xdr, &hdr);
5928         if (status)
5929                 goto out;
5930         status = decode_sequence(xdr, &res->seq_res, rqstp);
5931         if (status)
5932                 goto out;
5933         status = decode_putfh(xdr);
5934         if (status)
5935                 goto out;
5936         status = decode_getfattr(xdr, res->fattr, res->server);
5937 out:
5938         return status;
5939 }
5940
5941 /*
5942  * Encode an SETACL request
5943  */
5944 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
5945                                 struct nfs_setaclargs *args)
5946 {
5947         struct compound_hdr hdr = {
5948                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
5949         };
5950
5951         encode_compound_hdr(xdr, req, &hdr);
5952         encode_sequence(xdr, &args->seq_args, &hdr);
5953         encode_putfh(xdr, args->fh, &hdr);
5954         encode_setacl(xdr, args, &hdr);
5955         encode_nops(&hdr);
5956 }
5957
5958 /*
5959  * Decode SETACL response
5960  */
5961 static int
5962 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5963                     struct nfs_setaclres *res)
5964 {
5965         struct compound_hdr hdr;
5966         int status;
5967
5968         status = decode_compound_hdr(xdr, &hdr);
5969         if (status)
5970                 goto out;
5971         status = decode_sequence(xdr, &res->seq_res, rqstp);
5972         if (status)
5973                 goto out;
5974         status = decode_putfh(xdr);
5975         if (status)
5976                 goto out;
5977         status = decode_setattr(xdr);
5978 out:
5979         return status;
5980 }
5981
5982 /*
5983  * Decode GETACL response
5984  */
5985 static int
5986 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5987                     struct nfs_getaclres *res)
5988 {
5989         struct compound_hdr hdr;
5990         int status;
5991
5992         if (res->acl_scratch != NULL) {
5993                 void *p = page_address(res->acl_scratch);
5994                 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
5995         }
5996         status = decode_compound_hdr(xdr, &hdr);
5997         if (status)
5998                 goto out;
5999         status = decode_sequence(xdr, &res->seq_res, rqstp);
6000         if (status)
6001                 goto out;
6002         status = decode_putfh(xdr);
6003         if (status)
6004                 goto out;
6005         status = decode_getacl(xdr, rqstp, res);
6006
6007 out:
6008         return status;
6009 }
6010
6011 /*
6012  * Decode CLOSE response
6013  */
6014 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6015                               struct nfs_closeres *res)
6016 {
6017         struct compound_hdr hdr;
6018         int status;
6019
6020         status = decode_compound_hdr(xdr, &hdr);
6021         if (status)
6022                 goto out;
6023         status = decode_sequence(xdr, &res->seq_res, rqstp);
6024         if (status)
6025                 goto out;
6026         status = decode_putfh(xdr);
6027         if (status)
6028                 goto out;
6029         status = decode_close(xdr, res);
6030         if (status != 0)
6031                 goto out;
6032         /*
6033          * Note: Server may do delete on close for this file
6034          *      in which case the getattr call will fail with
6035          *      an ESTALE error. Shouldn't be a problem,
6036          *      though, since fattr->valid will remain unset.
6037          */
6038         decode_getfattr(xdr, res->fattr, res->server);
6039 out:
6040         return status;
6041 }
6042
6043 /*
6044  * Decode OPEN response
6045  */
6046 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6047                              struct nfs_openres *res)
6048 {
6049         struct compound_hdr hdr;
6050         int status;
6051
6052         status = decode_compound_hdr(xdr, &hdr);
6053         if (status)
6054                 goto out;
6055         status = decode_sequence(xdr, &res->seq_res, rqstp);
6056         if (status)
6057                 goto out;
6058         status = decode_putfh(xdr);
6059         if (status)
6060                 goto out;
6061         status = decode_savefh(xdr);
6062         if (status)
6063                 goto out;
6064         status = decode_open(xdr, res);
6065         if (status)
6066                 goto out;
6067         if (decode_getfh(xdr, &res->fh) != 0)
6068                 goto out;
6069         if (decode_getfattr(xdr, res->f_attr, res->server) != 0)
6070                 goto out;
6071         if (decode_restorefh(xdr) != 0)
6072                 goto out;
6073         decode_getfattr(xdr, res->dir_attr, res->server);
6074 out:
6075         return status;
6076 }
6077
6078 /*
6079  * Decode OPEN_CONFIRM response
6080  */
6081 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6082                                      struct xdr_stream *xdr,
6083                                      struct nfs_open_confirmres *res)
6084 {
6085         struct compound_hdr hdr;
6086         int status;
6087
6088         status = decode_compound_hdr(xdr, &hdr);
6089         if (status)
6090                 goto out;
6091         status = decode_putfh(xdr);
6092         if (status)
6093                 goto out;
6094         status = decode_open_confirm(xdr, res);
6095 out:
6096         return status;
6097 }
6098
6099 /*
6100  * Decode OPEN response
6101  */
6102 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6103                                     struct xdr_stream *xdr,
6104                                     struct nfs_openres *res)
6105 {
6106         struct compound_hdr hdr;
6107         int status;
6108
6109         status = decode_compound_hdr(xdr, &hdr);
6110         if (status)
6111                 goto out;
6112         status = decode_sequence(xdr, &res->seq_res, rqstp);
6113         if (status)
6114                 goto out;
6115         status = decode_putfh(xdr);
6116         if (status)
6117                 goto out;
6118         status = decode_open(xdr, res);
6119         if (status)
6120                 goto out;
6121         decode_getfattr(xdr, res->f_attr, res->server);
6122 out:
6123         return status;
6124 }
6125
6126 /*
6127  * Decode SETATTR response
6128  */
6129 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6130                                 struct xdr_stream *xdr,
6131                                 struct nfs_setattrres *res)
6132 {
6133         struct compound_hdr hdr;
6134         int status;
6135
6136         status = decode_compound_hdr(xdr, &hdr);
6137         if (status)
6138                 goto out;
6139         status = decode_sequence(xdr, &res->seq_res, rqstp);
6140         if (status)
6141                 goto out;
6142         status = decode_putfh(xdr);
6143         if (status)
6144                 goto out;
6145         status = decode_setattr(xdr);
6146         if (status)
6147                 goto out;
6148         decode_getfattr(xdr, res->fattr, res->server);
6149 out:
6150         return status;
6151 }
6152
6153 /*
6154  * Decode LOCK response
6155  */
6156 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6157                              struct nfs_lock_res *res)
6158 {
6159         struct compound_hdr hdr;
6160         int status;
6161
6162         status = decode_compound_hdr(xdr, &hdr);
6163         if (status)
6164                 goto out;
6165         status = decode_sequence(xdr, &res->seq_res, rqstp);
6166         if (status)
6167                 goto out;
6168         status = decode_putfh(xdr);
6169         if (status)
6170                 goto out;
6171         status = decode_lock(xdr, res);
6172 out:
6173         return status;
6174 }
6175
6176 /*
6177  * Decode LOCKT response
6178  */
6179 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6180                               struct nfs_lockt_res *res)
6181 {
6182         struct compound_hdr hdr;
6183         int status;
6184
6185         status = decode_compound_hdr(xdr, &hdr);
6186         if (status)
6187                 goto out;
6188         status = decode_sequence(xdr, &res->seq_res, rqstp);
6189         if (status)
6190                 goto out;
6191         status = decode_putfh(xdr);
6192         if (status)
6193                 goto out;
6194         status = decode_lockt(xdr, res);
6195 out:
6196         return status;
6197 }
6198
6199 /*
6200  * Decode LOCKU response
6201  */
6202 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6203                               struct nfs_locku_res *res)
6204 {
6205         struct compound_hdr hdr;
6206         int status;
6207
6208         status = decode_compound_hdr(xdr, &hdr);
6209         if (status)
6210                 goto out;
6211         status = decode_sequence(xdr, &res->seq_res, rqstp);
6212         if (status)
6213                 goto out;
6214         status = decode_putfh(xdr);
6215         if (status)
6216                 goto out;
6217         status = decode_locku(xdr, res);
6218 out:
6219         return status;
6220 }
6221
6222 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6223                                           struct xdr_stream *xdr, void *dummy)
6224 {
6225         struct compound_hdr hdr;
6226         int status;
6227
6228         status = decode_compound_hdr(xdr, &hdr);
6229         if (!status)
6230                 status = decode_release_lockowner(xdr);
6231         return status;
6232 }
6233
6234 /*
6235  * Decode READLINK response
6236  */
6237 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6238                                  struct xdr_stream *xdr,
6239                                  struct nfs4_readlink_res *res)
6240 {
6241         struct compound_hdr hdr;
6242         int status;
6243
6244         status = decode_compound_hdr(xdr, &hdr);
6245         if (status)
6246                 goto out;
6247         status = decode_sequence(xdr, &res->seq_res, rqstp);
6248         if (status)
6249                 goto out;
6250         status = decode_putfh(xdr);
6251         if (status)
6252                 goto out;
6253         status = decode_readlink(xdr, rqstp);
6254 out:
6255         return status;
6256 }
6257
6258 /*
6259  * Decode READDIR response
6260  */
6261 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6262                                 struct nfs4_readdir_res *res)
6263 {
6264         struct compound_hdr hdr;
6265         int status;
6266
6267         status = decode_compound_hdr(xdr, &hdr);
6268         if (status)
6269                 goto out;
6270         status = decode_sequence(xdr, &res->seq_res, rqstp);
6271         if (status)
6272                 goto out;
6273         status = decode_putfh(xdr);
6274         if (status)
6275                 goto out;
6276         status = decode_readdir(xdr, rqstp, res);
6277 out:
6278         return status;
6279 }
6280
6281 /*
6282  * Decode Read response
6283  */
6284 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6285                              struct nfs_readres *res)
6286 {
6287         struct compound_hdr hdr;
6288         int status;
6289
6290         status = decode_compound_hdr(xdr, &hdr);
6291         if (status)
6292                 goto out;
6293         status = decode_sequence(xdr, &res->seq_res, rqstp);
6294         if (status)
6295                 goto out;
6296         status = decode_putfh(xdr);
6297         if (status)
6298                 goto out;
6299         status = decode_read(xdr, rqstp, res);
6300         if (!status)
6301                 status = res->count;
6302 out:
6303         return status;
6304 }
6305
6306 /*
6307  * Decode WRITE response
6308  */
6309 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6310                               struct nfs_writeres *res)
6311 {
6312         struct compound_hdr hdr;
6313         int status;
6314
6315         status = decode_compound_hdr(xdr, &hdr);
6316         if (status)
6317                 goto out;
6318         status = decode_sequence(xdr, &res->seq_res, rqstp);
6319         if (status)
6320                 goto out;
6321         status = decode_putfh(xdr);
6322         if (status)
6323                 goto out;
6324         status = decode_write(xdr, res);
6325         if (status)
6326                 goto out;
6327         if (res->fattr)
6328                 decode_getfattr(xdr, res->fattr, res->server);
6329         if (!status)
6330                 status = res->count;
6331 out:
6332         return status;
6333 }
6334
6335 /*
6336  * Decode COMMIT response
6337  */
6338 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6339                                struct nfs_writeres *res)
6340 {
6341         struct compound_hdr hdr;
6342         int status;
6343
6344         status = decode_compound_hdr(xdr, &hdr);
6345         if (status)
6346                 goto out;
6347         status = decode_sequence(xdr, &res->seq_res, rqstp);
6348         if (status)
6349                 goto out;
6350         status = decode_putfh(xdr);
6351         if (status)
6352                 goto out;
6353         status = decode_commit(xdr, res);
6354         if (status)
6355                 goto out;
6356         if (res->fattr)
6357                 decode_getfattr(xdr, res->fattr, res->server);
6358 out:
6359         return status;
6360 }
6361
6362 /*
6363  * Decode FSINFO response
6364  */
6365 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6366                                struct nfs4_fsinfo_res *res)
6367 {
6368         struct compound_hdr hdr;
6369         int status;
6370
6371         status = decode_compound_hdr(xdr, &hdr);
6372         if (!status)
6373                 status = decode_sequence(xdr, &res->seq_res, req);
6374         if (!status)
6375                 status = decode_putfh(xdr);
6376         if (!status)
6377                 status = decode_fsinfo(xdr, res->fsinfo);
6378         return status;
6379 }
6380
6381 /*
6382  * Decode PATHCONF response
6383  */
6384 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6385                                  struct nfs4_pathconf_res *res)
6386 {
6387         struct compound_hdr hdr;
6388         int status;
6389
6390         status = decode_compound_hdr(xdr, &hdr);
6391         if (!status)
6392                 status = decode_sequence(xdr, &res->seq_res, req);
6393         if (!status)
6394                 status = decode_putfh(xdr);
6395         if (!status)
6396                 status = decode_pathconf(xdr, res->pathconf);
6397         return status;
6398 }
6399
6400 /*
6401  * Decode STATFS response
6402  */
6403 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6404                                struct nfs4_statfs_res *res)
6405 {
6406         struct compound_hdr hdr;
6407         int status;
6408
6409         status = decode_compound_hdr(xdr, &hdr);
6410         if (!status)
6411                 status = decode_sequence(xdr, &res->seq_res, req);
6412         if (!status)
6413                 status = decode_putfh(xdr);
6414         if (!status)
6415                 status = decode_statfs(xdr, res->fsstat);
6416         return status;
6417 }
6418
6419 /*
6420  * Decode GETATTR_BITMAP response
6421  */
6422 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6423                                     struct xdr_stream *xdr,
6424                                     struct nfs4_server_caps_res *res)
6425 {
6426         struct compound_hdr hdr;
6427         int status;
6428
6429         status = decode_compound_hdr(xdr, &hdr);
6430         if (status)
6431                 goto out;
6432         status = decode_sequence(xdr, &res->seq_res, req);
6433         if (status)
6434                 goto out;
6435         status = decode_putfh(xdr);
6436         if (status)
6437                 goto out;
6438         status = decode_server_caps(xdr, res);
6439 out:
6440         return status;
6441 }
6442
6443 /*
6444  * Decode RENEW response
6445  */
6446 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6447                               void *__unused)
6448 {
6449         struct compound_hdr hdr;
6450         int status;
6451
6452         status = decode_compound_hdr(xdr, &hdr);
6453         if (!status)
6454                 status = decode_renew(xdr);
6455         return status;
6456 }
6457
6458 /*
6459  * Decode SETCLIENTID response
6460  */
6461 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6462                                     struct xdr_stream *xdr,
6463                                     struct nfs4_setclientid_res *res)
6464 {
6465         struct compound_hdr hdr;
6466         int status;
6467
6468         status = decode_compound_hdr(xdr, &hdr);
6469         if (!status)
6470                 status = decode_setclientid(xdr, res);
6471         return status;
6472 }
6473
6474 /*
6475  * Decode SETCLIENTID_CONFIRM response
6476  */
6477 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6478                                             struct xdr_stream *xdr,
6479                                             struct nfs_fsinfo *fsinfo)
6480 {
6481         struct compound_hdr hdr;
6482         int status;
6483
6484         status = decode_compound_hdr(xdr, &hdr);
6485         if (!status)
6486                 status = decode_setclientid_confirm(xdr);
6487         if (!status)
6488                 status = decode_putrootfh(xdr);
6489         if (!status)
6490                 status = decode_fsinfo(xdr, fsinfo);
6491         return status;
6492 }
6493
6494 /*
6495  * Decode DELEGRETURN response
6496  */
6497 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6498                                     struct xdr_stream *xdr,
6499                                     struct nfs4_delegreturnres *res)
6500 {
6501         struct compound_hdr hdr;
6502         int status;
6503
6504         status = decode_compound_hdr(xdr, &hdr);
6505         if (status)
6506                 goto out;
6507         status = decode_sequence(xdr, &res->seq_res, rqstp);
6508         if (status)
6509                 goto out;
6510         status = decode_putfh(xdr);
6511         if (status != 0)
6512                 goto out;
6513         status = decode_delegreturn(xdr);
6514         if (status != 0)
6515                 goto out;
6516         decode_getfattr(xdr, res->fattr, res->server);
6517 out:
6518         return status;
6519 }
6520
6521 /*
6522  * Decode FS_LOCATIONS response
6523  */
6524 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6525                                      struct xdr_stream *xdr,
6526                                      struct nfs4_fs_locations_res *res)
6527 {
6528         struct compound_hdr hdr;
6529         int status;
6530
6531         status = decode_compound_hdr(xdr, &hdr);
6532         if (status)
6533                 goto out;
6534         status = decode_sequence(xdr, &res->seq_res, req);
6535         if (status)
6536                 goto out;
6537         status = decode_putfh(xdr);
6538         if (status)
6539                 goto out;
6540         status = decode_lookup(xdr);
6541         if (status)
6542                 goto out;
6543         xdr_enter_page(xdr, PAGE_SIZE);
6544         status = decode_getfattr_generic(xdr, &res->fs_locations->fattr,
6545                                          NULL, res->fs_locations,
6546                                          res->fs_locations->server);
6547 out:
6548         return status;
6549 }
6550
6551 /*
6552  * Decode SECINFO response
6553  */
6554 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6555                                 struct xdr_stream *xdr,
6556                                 struct nfs4_secinfo_res *res)
6557 {
6558         struct compound_hdr hdr;
6559         int status;
6560
6561         status = decode_compound_hdr(xdr, &hdr);
6562         if (status)
6563                 goto out;
6564         status = decode_sequence(xdr, &res->seq_res, rqstp);
6565         if (status)
6566                 goto out;
6567         status = decode_putfh(xdr);
6568         if (status)
6569                 goto out;
6570         status = decode_secinfo(xdr, res);
6571 out:
6572         return status;
6573 }
6574
6575 #if defined(CONFIG_NFS_V4_1)
6576 /*
6577  * Decode EXCHANGE_ID response
6578  */
6579 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
6580                                     struct xdr_stream *xdr,
6581                                     void *res)
6582 {
6583         struct compound_hdr hdr;
6584         int status;
6585
6586         status = decode_compound_hdr(xdr, &hdr);
6587         if (!status)
6588                 status = decode_exchange_id(xdr, res);
6589         return status;
6590 }
6591
6592 /*
6593  * Decode CREATE_SESSION response
6594  */
6595 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
6596                                        struct xdr_stream *xdr,
6597                                        struct nfs41_create_session_res *res)
6598 {
6599         struct compound_hdr hdr;
6600         int status;
6601
6602         status = decode_compound_hdr(xdr, &hdr);
6603         if (!status)
6604                 status = decode_create_session(xdr, res);
6605         return status;
6606 }
6607
6608 /*
6609  * Decode DESTROY_SESSION response
6610  */
6611 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
6612                                         struct xdr_stream *xdr,
6613                                         void *res)
6614 {
6615         struct compound_hdr hdr;
6616         int status;
6617
6618         status = decode_compound_hdr(xdr, &hdr);
6619         if (!status)
6620                 status = decode_destroy_session(xdr, res);
6621         return status;
6622 }
6623
6624 /*
6625  * Decode SEQUENCE response
6626  */
6627 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
6628                                  struct xdr_stream *xdr,
6629                                  struct nfs4_sequence_res *res)
6630 {
6631         struct compound_hdr hdr;
6632         int status;
6633
6634         status = decode_compound_hdr(xdr, &hdr);
6635         if (!status)
6636                 status = decode_sequence(xdr, res, rqstp);
6637         return status;
6638 }
6639
6640 /*
6641  * Decode GET_LEASE_TIME response
6642  */
6643 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
6644                                        struct xdr_stream *xdr,
6645                                        struct nfs4_get_lease_time_res *res)
6646 {
6647         struct compound_hdr hdr;
6648         int status;
6649
6650         status = decode_compound_hdr(xdr, &hdr);
6651         if (!status)
6652                 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
6653         if (!status)
6654                 status = decode_putrootfh(xdr);
6655         if (!status)
6656                 status = decode_fsinfo(xdr, res->lr_fsinfo);
6657         return status;
6658 }
6659
6660 /*
6661  * Decode RECLAIM_COMPLETE response
6662  */
6663 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
6664                                          struct xdr_stream *xdr,
6665                                          struct nfs41_reclaim_complete_res *res)
6666 {
6667         struct compound_hdr hdr;
6668         int status;
6669
6670         status = decode_compound_hdr(xdr, &hdr);
6671         if (!status)
6672                 status = decode_sequence(xdr, &res->seq_res, rqstp);
6673         if (!status)
6674                 status = decode_reclaim_complete(xdr, (void *)NULL);
6675         return status;
6676 }
6677
6678 /*
6679  * Decode GETDEVICELIST response
6680  */
6681 static int nfs4_xdr_dec_getdevicelist(struct rpc_rqst *rqstp,
6682                                       struct xdr_stream *xdr,
6683                                       struct nfs4_getdevicelist_res *res)
6684 {
6685         struct compound_hdr hdr;
6686         int status;
6687
6688         dprintk("encoding getdevicelist!\n");
6689
6690         status = decode_compound_hdr(xdr, &hdr);
6691         if (status != 0)
6692                 goto out;
6693         status = decode_sequence(xdr, &res->seq_res, rqstp);
6694         if (status != 0)
6695                 goto out;
6696         status = decode_putfh(xdr);
6697         if (status != 0)
6698                 goto out;
6699         status = decode_getdevicelist(xdr, res->devlist);
6700 out:
6701         return status;
6702 }
6703
6704 /*
6705  * Decode GETDEVINFO response
6706  */
6707 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
6708                                       struct xdr_stream *xdr,
6709                                       struct nfs4_getdeviceinfo_res *res)
6710 {
6711         struct compound_hdr hdr;
6712         int status;
6713
6714         status = decode_compound_hdr(xdr, &hdr);
6715         if (status != 0)
6716                 goto out;
6717         status = decode_sequence(xdr, &res->seq_res, rqstp);
6718         if (status != 0)
6719                 goto out;
6720         status = decode_getdeviceinfo(xdr, res->pdev);
6721 out:
6722         return status;
6723 }
6724
6725 /*
6726  * Decode LAYOUTGET response
6727  */
6728 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
6729                                   struct xdr_stream *xdr,
6730                                   struct nfs4_layoutget_res *res)
6731 {
6732         struct compound_hdr hdr;
6733         int status;
6734
6735         status = decode_compound_hdr(xdr, &hdr);
6736         if (status)
6737                 goto out;
6738         status = decode_sequence(xdr, &res->seq_res, rqstp);
6739         if (status)
6740                 goto out;
6741         status = decode_putfh(xdr);
6742         if (status)
6743                 goto out;
6744         status = decode_layoutget(xdr, rqstp, res);
6745 out:
6746         return status;
6747 }
6748
6749 /*
6750  * Decode LAYOUTRETURN response
6751  */
6752 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
6753                                      struct xdr_stream *xdr,
6754                                      struct nfs4_layoutreturn_res *res)
6755 {
6756         struct compound_hdr hdr;
6757         int status;
6758
6759         status = decode_compound_hdr(xdr, &hdr);
6760         if (status)
6761                 goto out;
6762         status = decode_sequence(xdr, &res->seq_res, rqstp);
6763         if (status)
6764                 goto out;
6765         status = decode_putfh(xdr);
6766         if (status)
6767                 goto out;
6768         status = decode_layoutreturn(xdr, res);
6769 out:
6770         return status;
6771 }
6772
6773 /*
6774  * Decode LAYOUTCOMMIT response
6775  */
6776 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
6777                                      struct xdr_stream *xdr,
6778                                      struct nfs4_layoutcommit_res *res)
6779 {
6780         struct compound_hdr hdr;
6781         int status;
6782
6783         status = decode_compound_hdr(xdr, &hdr);
6784         if (status)
6785                 goto out;
6786         status = decode_sequence(xdr, &res->seq_res, rqstp);
6787         if (status)
6788                 goto out;
6789         status = decode_putfh(xdr);
6790         if (status)
6791                 goto out;
6792         status = decode_layoutcommit(xdr, rqstp, res);
6793         if (status)
6794                 goto out;
6795         decode_getfattr(xdr, res->fattr, res->server);
6796 out:
6797         return status;
6798 }
6799
6800 /*
6801  * Decode SECINFO_NO_NAME response
6802  */
6803 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
6804                                         struct xdr_stream *xdr,
6805                                         struct nfs4_secinfo_res *res)
6806 {
6807         struct compound_hdr hdr;
6808         int status;
6809
6810         status = decode_compound_hdr(xdr, &hdr);
6811         if (status)
6812                 goto out;
6813         status = decode_sequence(xdr, &res->seq_res, rqstp);
6814         if (status)
6815                 goto out;
6816         status = decode_putrootfh(xdr);
6817         if (status)
6818                 goto out;
6819         status = decode_secinfo(xdr, res);
6820 out:
6821         return status;
6822 }
6823
6824 /*
6825  * Decode TEST_STATEID response
6826  */
6827 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
6828                                      struct xdr_stream *xdr,
6829                                      struct nfs41_test_stateid_res *res)
6830 {
6831         struct compound_hdr hdr;
6832         int status;
6833
6834         status = decode_compound_hdr(xdr, &hdr);
6835         if (status)
6836                 goto out;
6837         status = decode_sequence(xdr, &res->seq_res, rqstp);
6838         if (status)
6839                 goto out;
6840         status = decode_test_stateid(xdr, res);
6841 out:
6842         return status;
6843 }
6844
6845 /*
6846  * Decode FREE_STATEID response
6847  */
6848 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
6849                                      struct xdr_stream *xdr,
6850                                      struct nfs41_free_stateid_res *res)
6851 {
6852         struct compound_hdr hdr;
6853         int status;
6854
6855         status = decode_compound_hdr(xdr, &hdr);
6856         if (status)
6857                 goto out;
6858         status = decode_sequence(xdr, &res->seq_res, rqstp);
6859         if (status)
6860                 goto out;
6861         status = decode_free_stateid(xdr, res);
6862 out:
6863         return status;
6864 }
6865 #endif /* CONFIG_NFS_V4_1 */
6866
6867 /**
6868  * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
6869  *                      the local page cache.
6870  * @xdr: XDR stream where entry resides
6871  * @entry: buffer to fill in with entry data
6872  * @plus: boolean indicating whether this should be a readdirplus entry
6873  *
6874  * Returns zero if successful, otherwise a negative errno value is
6875  * returned.
6876  *
6877  * This function is not invoked during READDIR reply decoding, but
6878  * rather whenever an application invokes the getdents(2) system call
6879  * on a directory already in our cache.
6880  */
6881 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
6882                        int plus)
6883 {
6884         uint32_t bitmap[3] = {0};
6885         uint32_t len;
6886         __be32 *p = xdr_inline_decode(xdr, 4);
6887         if (unlikely(!p))
6888                 goto out_overflow;
6889         if (*p == xdr_zero) {
6890                 p = xdr_inline_decode(xdr, 4);
6891                 if (unlikely(!p))
6892                         goto out_overflow;
6893                 if (*p == xdr_zero)
6894                         return -EAGAIN;
6895                 entry->eof = 1;
6896                 return -EBADCOOKIE;
6897         }
6898
6899         p = xdr_inline_decode(xdr, 12);
6900         if (unlikely(!p))
6901                 goto out_overflow;
6902         entry->prev_cookie = entry->cookie;
6903         p = xdr_decode_hyper(p, &entry->cookie);
6904         entry->len = be32_to_cpup(p);
6905
6906         p = xdr_inline_decode(xdr, entry->len);
6907         if (unlikely(!p))
6908                 goto out_overflow;
6909         entry->name = (const char *) p;
6910
6911         /*
6912          * In case the server doesn't return an inode number,
6913          * we fake one here.  (We don't use inode number 0,
6914          * since glibc seems to choke on it...)
6915          */
6916         entry->ino = 1;
6917         entry->fattr->valid = 0;
6918
6919         if (decode_attr_bitmap(xdr, bitmap) < 0)
6920                 goto out_overflow;
6921
6922         if (decode_attr_length(xdr, &len, &p) < 0)
6923                 goto out_overflow;
6924
6925         if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
6926                                   NULL, entry->server) < 0)
6927                 goto out_overflow;
6928         if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
6929                 entry->ino = entry->fattr->mounted_on_fileid;
6930         else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
6931                 entry->ino = entry->fattr->fileid;
6932
6933         entry->d_type = DT_UNKNOWN;
6934         if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
6935                 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
6936
6937         return 0;
6938
6939 out_overflow:
6940         print_overflow_msg(__func__, xdr);
6941         return -EAGAIN;
6942 }
6943
6944 /*
6945  * We need to translate between nfs status return values and
6946  * the local errno values which may not be the same.
6947  */
6948 static struct {
6949         int stat;
6950         int errno;
6951 } nfs_errtbl[] = {
6952         { NFS4_OK,              0               },
6953         { NFS4ERR_PERM,         -EPERM          },
6954         { NFS4ERR_NOENT,        -ENOENT         },
6955         { NFS4ERR_IO,           -errno_NFSERR_IO},
6956         { NFS4ERR_NXIO,         -ENXIO          },
6957         { NFS4ERR_ACCESS,       -EACCES         },
6958         { NFS4ERR_EXIST,        -EEXIST         },
6959         { NFS4ERR_XDEV,         -EXDEV          },
6960         { NFS4ERR_NOTDIR,       -ENOTDIR        },
6961         { NFS4ERR_ISDIR,        -EISDIR         },
6962         { NFS4ERR_INVAL,        -EINVAL         },
6963         { NFS4ERR_FBIG,         -EFBIG          },
6964         { NFS4ERR_NOSPC,        -ENOSPC         },
6965         { NFS4ERR_ROFS,         -EROFS          },
6966         { NFS4ERR_MLINK,        -EMLINK         },
6967         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
6968         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
6969         { NFS4ERR_DQUOT,        -EDQUOT         },
6970         { NFS4ERR_STALE,        -ESTALE         },
6971         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
6972         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
6973         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
6974         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
6975         { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
6976         { NFS4ERR_BADTYPE,      -EBADTYPE       },
6977         { NFS4ERR_LOCKED,       -EAGAIN         },
6978         { NFS4ERR_SYMLINK,      -ELOOP          },
6979         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
6980         { NFS4ERR_DEADLOCK,     -EDEADLK        },
6981         { -1,                   -EIO            }
6982 };
6983
6984 /*
6985  * Convert an NFS error code to a local one.
6986  * This one is used jointly by NFSv2 and NFSv3.
6987  */
6988 static int
6989 nfs4_stat_to_errno(int stat)
6990 {
6991         int i;
6992         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
6993                 if (nfs_errtbl[i].stat == stat)
6994                         return nfs_errtbl[i].errno;
6995         }
6996         if (stat <= 10000 || stat > 10100) {
6997                 /* The server is looney tunes. */
6998                 return -EREMOTEIO;
6999         }
7000         /* If we cannot translate the error, the recovery routines should
7001          * handle it.
7002          * Note: remaining NFSv4 error codes have values > 10000, so should
7003          * not conflict with native Linux error codes.
7004          */
7005         return -stat;
7006 }
7007
7008 #define PROC(proc, argtype, restype)                            \
7009 [NFSPROC4_CLNT_##proc] = {                                      \
7010         .p_proc   = NFSPROC4_COMPOUND,                          \
7011         .p_encode = (kxdreproc_t)nfs4_xdr_##argtype,            \
7012         .p_decode = (kxdrdproc_t)nfs4_xdr_##restype,            \
7013         .p_arglen = NFS4_##argtype##_sz,                        \
7014         .p_replen = NFS4_##restype##_sz,                        \
7015         .p_statidx = NFSPROC4_CLNT_##proc,                      \
7016         .p_name   = #proc,                                      \
7017 }
7018
7019 struct rpc_procinfo     nfs4_procedures[] = {
7020         PROC(READ,              enc_read,               dec_read),
7021         PROC(WRITE,             enc_write,              dec_write),
7022         PROC(COMMIT,            enc_commit,             dec_commit),
7023         PROC(OPEN,              enc_open,               dec_open),
7024         PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
7025         PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
7026         PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
7027         PROC(CLOSE,             enc_close,              dec_close),
7028         PROC(SETATTR,           enc_setattr,            dec_setattr),
7029         PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
7030         PROC(RENEW,             enc_renew,              dec_renew),
7031         PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
7032         PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7033         PROC(LOCK,              enc_lock,               dec_lock),
7034         PROC(LOCKT,             enc_lockt,              dec_lockt),
7035         PROC(LOCKU,             enc_locku,              dec_locku),
7036         PROC(ACCESS,            enc_access,             dec_access),
7037         PROC(GETATTR,           enc_getattr,            dec_getattr),
7038         PROC(LOOKUP,            enc_lookup,             dec_lookup),
7039         PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
7040         PROC(REMOVE,            enc_remove,             dec_remove),
7041         PROC(RENAME,            enc_rename,             dec_rename),
7042         PROC(LINK,              enc_link,               dec_link),
7043         PROC(SYMLINK,           enc_symlink,            dec_symlink),
7044         PROC(CREATE,            enc_create,             dec_create),
7045         PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
7046         PROC(STATFS,            enc_statfs,             dec_statfs),
7047         PROC(READLINK,          enc_readlink,           dec_readlink),
7048         PROC(READDIR,           enc_readdir,            dec_readdir),
7049         PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
7050         PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
7051         PROC(GETACL,            enc_getacl,             dec_getacl),
7052         PROC(SETACL,            enc_setacl,             dec_setacl),
7053         PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
7054         PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
7055         PROC(SECINFO,           enc_secinfo,            dec_secinfo),
7056 #if defined(CONFIG_NFS_V4_1)
7057         PROC(EXCHANGE_ID,       enc_exchange_id,        dec_exchange_id),
7058         PROC(CREATE_SESSION,    enc_create_session,     dec_create_session),
7059         PROC(DESTROY_SESSION,   enc_destroy_session,    dec_destroy_session),
7060         PROC(SEQUENCE,          enc_sequence,           dec_sequence),
7061         PROC(GET_LEASE_TIME,    enc_get_lease_time,     dec_get_lease_time),
7062         PROC(RECLAIM_COMPLETE,  enc_reclaim_complete,   dec_reclaim_complete),
7063         PROC(GETDEVICEINFO,     enc_getdeviceinfo,      dec_getdeviceinfo),
7064         PROC(LAYOUTGET,         enc_layoutget,          dec_layoutget),
7065         PROC(LAYOUTCOMMIT,      enc_layoutcommit,       dec_layoutcommit),
7066         PROC(LAYOUTRETURN,      enc_layoutreturn,       dec_layoutreturn),
7067         PROC(SECINFO_NO_NAME,   enc_secinfo_no_name,    dec_secinfo_no_name),
7068         PROC(TEST_STATEID,      enc_test_stateid,       dec_test_stateid),
7069         PROC(FREE_STATEID,      enc_free_stateid,       dec_free_stateid),
7070         PROC(GETDEVICELIST,     enc_getdevicelist,      dec_getdevicelist),
7071 #endif /* CONFIG_NFS_V4_1 */
7072 };
7073
7074 const struct rpc_version nfs_version4 = {
7075         .number                 = 4,
7076         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
7077         .procs                  = nfs4_procedures
7078 };
7079
7080 /*
7081  * Local variables:
7082  *  c-basic-offset: 8
7083  * End:
7084  */