fs/nfs/nfs4xdr.c

   1 /*
   2  *  fs/nfs/nfs4xdr.c
   3  *
   4  *  Client-side XDR for NFSv4.
   5  *
   6  *  Copyright (c) 2002 The Regents of the University of Michigan.
   7  *  All rights reserved.
   8  *
   9  *  Kendrick Smith <kmsmith@umich.edu>
  10  *  Andy Adamson   <andros@umich.edu>
  11  *
  12  *  Redistribution and use in source and binary forms, with or without
  13  *  modification, are permitted provided that the following conditions
  14  *  are met:
  15  *
  16  *  1. Redistributions of source code must retain the above copyright
  17  *     notice, this list of conditions and the following disclaimer.
  18  *  2. Redistributions in binary form must reproduce the above copyright
  19  *     notice, this list of conditions and the following disclaimer in the
  20  *     documentation and/or other materials provided with the distribution.
  21  *  3. Neither the name of the University nor the names of its
  22  *     contributors may be used to endorse or promote products derived
  23  *     from this software without specific prior written permission.
  24  *
  25  *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  26  *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  27  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  28  *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  29  *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30  *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31  *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  32  *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  33  *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  34  *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  35  *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 #include <linux/param.h>
  39 #include <linux/time.h>
  40 #include <linux/mm.h>
  41 #include <linux/errno.h>
  42 #include <linux/string.h>
  43 #include <linux/in.h>
  44 #include <linux/pagemap.h>
  45 #include <linux/proc_fs.h>
  46 #include <linux/kdev_t.h>
  47 #include <linux/sunrpc/clnt.h>
  48 #include <linux/sunrpc/msg_prot.h>
  49 #include <linux/sunrpc/gss_api.h>
  50 #include <linux/nfs.h>
  51 #include <linux/nfs4.h>
  52 #include <linux/nfs_fs.h>
  53 #include <linux/nfs_idmap.h>
  54 #include "nfs4_fs.h"
  55 #include "internal.h"
  56 #include "pnfs.h"
  57
  58 #define NFSDBG_FACILITY         NFSDBG_XDR
  59
  60 /* Mapping from NFS error code to "errno" error code. */
  61 #define errno_NFSERR_IO         EIO
  62
  63 static int nfs4_stat_to_errno(int);
  64
  65 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
  66 #ifdef DEBUG
  67 #define NFS4_MAXTAGLEN          20
  68 #else
  69 #define NFS4_MAXTAGLEN          0
  70 #endif
  71
  72 /* lock,open owner id:
  73  * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT  >> 2)
  74  */
  75 #define open_owner_id_maxsz     (1 + 1 + 4)
  76 #define lock_owner_id_maxsz     (1 + 1 + 4)
  77 #define decode_lockowner_maxsz  (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  78 #define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  79 #define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  80 #define op_encode_hdr_maxsz     (1)
  81 #define op_decode_hdr_maxsz     (2)
  82 #define encode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  83 #define decode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  84 #define encode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  85 #define decode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  86 #define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
  87                                 (NFS4_FHSIZE >> 2))
  88 #define decode_putfh_maxsz      (op_decode_hdr_maxsz)
  89 #define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
  90 #define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
  91 #define encode_getfh_maxsz      (op_encode_hdr_maxsz)
  92 #define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
  93                                 ((3+NFS4_FHSIZE) >> 2))
  94 #define nfs4_fattr_bitmap_maxsz 4
  95 #define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
  96 #define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
  97 #define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
  98 #define nfs4_owner_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  99 #define nfs4_group_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 100 /* This is based on getfattr, which uses the most attributes: */
 101 #define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
 102                                 3 + 3 + 3 + nfs4_owner_maxsz + nfs4_group_maxsz))
 103 #define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
 104                                 nfs4_fattr_value_maxsz)
 105 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
 106 #define encode_attrs_maxsz      (nfs4_fattr_bitmap_maxsz + \
 107                                  1 + 2 + 1 + \
 108                                 nfs4_owner_maxsz + \
 109                                 nfs4_group_maxsz + \
 110                                 4 + 4)
 111 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
 112 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
 113 #define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
 114 #define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 115 #define encode_fsinfo_maxsz     (encode_getattr_maxsz)
 116 /* The 5 accounts for the PNFS attributes, and assumes that at most three
 117  * layout types will be returned.
 118  */
 119 #define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + \
 120                                  nfs4_fattr_bitmap_maxsz + 4 + 8 + 5)
 121 #define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 122 #define decode_renew_maxsz      (op_decode_hdr_maxsz)
 123 #define encode_setclientid_maxsz \
 124                                 (op_encode_hdr_maxsz + \
 125                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 126                                 XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
 127                                 1 /* sc_prog */ + \
 128                                 XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 129                                 XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
 130                                 1) /* sc_cb_ident */
 131 #define decode_setclientid_maxsz \
 132                                 (op_decode_hdr_maxsz + \
 133                                 2 + \
 134                                 1024) /* large value for CLID_INUSE */
 135 #define encode_setclientid_confirm_maxsz \
 136                                 (op_encode_hdr_maxsz + \
 137                                 3 + (NFS4_VERIFIER_SIZE >> 2))
 138 #define decode_setclientid_confirm_maxsz \
 139                                 (op_decode_hdr_maxsz)
 140 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
 141 #define decode_lookup_maxsz     (op_decode_hdr_maxsz)
 142 #define encode_share_access_maxsz \
 143                                 (2)
 144 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
 145 #define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
 146 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
 147 #define encode_open_maxsz       (op_encode_hdr_maxsz + \
 148                                 2 + encode_share_access_maxsz + 2 + \
 149                                 open_owner_id_maxsz + \
 150                                 encode_opentype_maxsz + \
 151                                 encode_claim_null_maxsz)
 152 #define decode_space_limit_maxsz        (3)
 153 #define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
 154 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
 155                                 decode_space_limit_maxsz + \
 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 /* zero implemetation id array */)
 277 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
 278                                 2 /* eir_clientid */ + \
 279                                 1 /* eir_sequenceid */ + \
 280                                 1 /* eir_flags */ + \
 281                                 1 /* spr_how */ + \
 282                                 0 /* SP4_NONE (for now) */ + \
 283                                 2 /* eir_server_owner.so_minor_id */ + \
 284                                 /* eir_server_owner.so_major_id<> */ \
 285                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 286                                 /* eir_server_scope<> */ \
 287                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 288                                 1 /* eir_server_impl_id array length */ + \
 289                                 0 /* ignored eir_server_impl_id contents */)
 290 #define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
 291 #define decode_channel_attrs_maxsz  (6 + \
 292                                      1 /* ca_rdma_ird.len */ + \
 293                                      1 /* ca_rdma_ird */)
 294 #define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
 295                                      2 /* csa_clientid */ + \
 296                                      1 /* csa_sequence */ + \
 297                                      1 /* csa_flags */ + \
 298                                      encode_channel_attrs_maxsz + \
 299                                      encode_channel_attrs_maxsz + \
 300                                      1 /* csa_cb_program */ + \
 301                                      1 /* csa_sec_parms.len (1) */ + \
 302                                      1 /* cb_secflavor (AUTH_SYS) */ + \
 303                                      1 /* stamp */ + \
 304                                      1 /* machinename.len */ + \
 305                                      XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
 306                                      1 /* uid */ + \
 307                                      1 /* gid */ + \
 308                                      1 /* gids.len (0) */)
 309 #define decode_create_session_maxsz  (op_decode_hdr_maxsz +     \
 310                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 311                                      1 /* csr_sequence */ + \
 312                                      1 /* csr_flags */ + \
 313                                      decode_channel_attrs_maxsz + \
 314                                      decode_channel_attrs_maxsz)
 315 #define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
 316 #define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
 317 #define encode_sequence_maxsz   (op_encode_hdr_maxsz + \
 318                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
 319 #define decode_sequence_maxsz   (op_decode_hdr_maxsz + \
 320                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
 321 #define encode_reclaim_complete_maxsz   (op_encode_hdr_maxsz + 4)
 322 #define decode_reclaim_complete_maxsz   (op_decode_hdr_maxsz + 4)
 323 #define encode_getdevicelist_maxsz (op_encode_hdr_maxsz + 4 + \
 324                                 encode_verifier_maxsz)
 325 #define decode_getdevicelist_maxsz (op_decode_hdr_maxsz + \
 326                                 2 /* nfs_cookie4 gdlr_cookie */ + \
 327                                 decode_verifier_maxsz \
 328                                   /* verifier4 gdlr_verifier */ + \
 329                                 1 /* gdlr_deviceid_list count */ + \
 330                                 XDR_QUADLEN(NFS4_PNFS_GETDEVLIST_MAXNUM * \
 331                                             NFS4_DEVICEID4_SIZE) \
 332                                   /* gdlr_deviceid_list */ + \
 333                                 1 /* bool gdlr_eof */)
 334 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + 4 + \
 335                                 XDR_QUADLEN(NFS4_DEVICEID4_SIZE))
 336 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
 337                                 1 /* layout type */ + \
 338                                 1 /* opaque devaddr4 length */ + \
 339                                   /* devaddr4 payload is read into page */ \
 340                                 1 /* notification bitmap length */ + \
 341                                 1 /* notification bitmap */)
 342 #define encode_layoutget_maxsz  (op_encode_hdr_maxsz + 10 + \
 343                                 encode_stateid_maxsz)
 344 #define decode_layoutget_maxsz  (op_decode_hdr_maxsz + 8 + \
 345                                 decode_stateid_maxsz + \
 346                                 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
 347 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz +          \
 348                                 2 /* offset */ + \
 349                                 2 /* length */ + \
 350                                 1 /* reclaim */ + \
 351                                 encode_stateid_maxsz + \
 352                                 1 /* new offset (true) */ + \
 353                                 2 /* last byte written */ + \
 354                                 1 /* nt_timechanged (false) */ + \
 355                                 1 /* layoutupdate4 layout type */ + \
 356                                 1 /* NULL filelayout layoutupdate4 payload */)
 357 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
 358 #define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
 359                                 encode_stateid_maxsz + \
 360                                 1 /* FIXME: opaque lrf_body always empty at the moment */)
 361 #define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
 362                                 1 + decode_stateid_maxsz)
 363 #define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
 364 #define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
 365 #define encode_test_stateid_maxsz       (op_encode_hdr_maxsz + 2 + \
 366                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 367 #define decode_test_stateid_maxsz       (op_decode_hdr_maxsz + 2 + 1)
 368 #define encode_free_stateid_maxsz       (op_encode_hdr_maxsz + 1 + \
 369                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 370 #define decode_free_stateid_maxsz       (op_decode_hdr_maxsz + 1)
 371 #else /* CONFIG_NFS_V4_1 */
 372 #define encode_sequence_maxsz   0
 373 #define decode_sequence_maxsz   0
 374 #endif /* CONFIG_NFS_V4_1 */
 375
 376 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 377 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 378 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 379                                 encode_sequence_maxsz + \
 380                                 encode_putfh_maxsz + \
 381                                 encode_read_maxsz)
 382 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 383                                 decode_sequence_maxsz + \
 384                                 decode_putfh_maxsz + \
 385                                 decode_read_maxsz)
 386 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 387                                 encode_sequence_maxsz + \
 388                                 encode_putfh_maxsz + \
 389                                 encode_readlink_maxsz)
 390 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 391                                 decode_sequence_maxsz + \
 392                                 decode_putfh_maxsz + \
 393                                 decode_readlink_maxsz)
 394 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 395                                 encode_sequence_maxsz + \
 396                                 encode_putfh_maxsz + \
 397                                 encode_readdir_maxsz)
 398 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 399                                 decode_sequence_maxsz + \
 400                                 decode_putfh_maxsz + \
 401                                 decode_readdir_maxsz)
 402 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 403                                 encode_sequence_maxsz + \
 404                                 encode_putfh_maxsz + \
 405                                 encode_write_maxsz + \
 406                                 encode_getattr_maxsz)
 407 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 408                                 decode_sequence_maxsz + \
 409                                 decode_putfh_maxsz + \
 410                                 decode_write_maxsz + \
 411                                 decode_getattr_maxsz)
 412 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 413                                 encode_sequence_maxsz + \
 414                                 encode_putfh_maxsz + \
 415                                 encode_commit_maxsz + \
 416                                 encode_getattr_maxsz)
 417 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 418                                 decode_sequence_maxsz + \
 419                                 decode_putfh_maxsz + \
 420                                 decode_commit_maxsz + \
 421                                 decode_getattr_maxsz)
 422 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 423                                 encode_sequence_maxsz + \
 424                                 encode_putfh_maxsz + \
 425                                 encode_savefh_maxsz + \
 426                                 encode_open_maxsz + \
 427                                 encode_getfh_maxsz + \
 428                                 encode_getattr_maxsz + \
 429                                 encode_restorefh_maxsz + \
 430                                 encode_getattr_maxsz)
 431 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 432                                 decode_sequence_maxsz + \
 433                                 decode_putfh_maxsz + \
 434                                 decode_savefh_maxsz + \
 435                                 decode_open_maxsz + \
 436                                 decode_getfh_maxsz + \
 437                                 decode_getattr_maxsz + \
 438                                 decode_restorefh_maxsz + \
 439                                 decode_getattr_maxsz)
 440 #define NFS4_enc_open_confirm_sz \
 441                                 (compound_encode_hdr_maxsz + \
 442                                  encode_putfh_maxsz + \
 443                                  encode_open_confirm_maxsz)
 444 #define NFS4_dec_open_confirm_sz \
 445                                 (compound_decode_hdr_maxsz + \
 446                                  decode_putfh_maxsz + \
 447                                  decode_open_confirm_maxsz)
 448 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 449                                         encode_sequence_maxsz + \
 450                                         encode_putfh_maxsz + \
 451                                         encode_open_maxsz + \
 452                                         encode_getattr_maxsz)
 453 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 454                                         decode_sequence_maxsz + \
 455                                         decode_putfh_maxsz + \
 456                                         decode_open_maxsz + \
 457                                         decode_getattr_maxsz)
 458 #define NFS4_enc_open_downgrade_sz \
 459                                 (compound_encode_hdr_maxsz + \
 460                                  encode_sequence_maxsz + \
 461                                  encode_putfh_maxsz + \
 462                                  encode_open_downgrade_maxsz + \
 463                                  encode_getattr_maxsz)
 464 #define NFS4_dec_open_downgrade_sz \
 465                                 (compound_decode_hdr_maxsz + \
 466                                  decode_sequence_maxsz + \
 467                                  decode_putfh_maxsz + \
 468                                  decode_open_downgrade_maxsz + \
 469                                  decode_getattr_maxsz)
 470 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 471                                  encode_sequence_maxsz + \
 472                                  encode_putfh_maxsz + \
 473                                  encode_close_maxsz + \
 474                                  encode_getattr_maxsz)
 475 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 476                                  decode_sequence_maxsz + \
 477                                  decode_putfh_maxsz + \
 478                                  decode_close_maxsz + \
 479                                  decode_getattr_maxsz)
 480 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 481                                  encode_sequence_maxsz + \
 482                                  encode_putfh_maxsz + \
 483                                  encode_setattr_maxsz + \
 484                                  encode_getattr_maxsz)
 485 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 486                                  decode_sequence_maxsz + \
 487                                  decode_putfh_maxsz + \
 488                                  decode_setattr_maxsz + \
 489                                  decode_getattr_maxsz)
 490 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 491                                 encode_sequence_maxsz + \
 492                                 encode_putfh_maxsz + \
 493                                 encode_fsinfo_maxsz)
 494 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 495                                 decode_sequence_maxsz + \
 496                                 decode_putfh_maxsz + \
 497                                 decode_fsinfo_maxsz)
 498 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 499                                 encode_renew_maxsz)
 500 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 501                                 decode_renew_maxsz)
 502 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 503                                 encode_setclientid_maxsz)
 504 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 505                                 decode_setclientid_maxsz)
 506 #define NFS4_enc_setclientid_confirm_sz \
 507                                 (compound_encode_hdr_maxsz + \
 508                                 encode_setclientid_confirm_maxsz + \
 509                                 encode_putrootfh_maxsz + \
 510                                 encode_fsinfo_maxsz)
 511 #define NFS4_dec_setclientid_confirm_sz \
 512                                 (compound_decode_hdr_maxsz + \
 513                                 decode_setclientid_confirm_maxsz + \
 514                                 decode_putrootfh_maxsz + \
 515                                 decode_fsinfo_maxsz)
 516 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 517                                 encode_sequence_maxsz + \
 518                                 encode_putfh_maxsz + \
 519                                 encode_lock_maxsz)
 520 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 521                                 decode_sequence_maxsz + \
 522                                 decode_putfh_maxsz + \
 523                                 decode_lock_maxsz)
 524 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 525                                 encode_sequence_maxsz + \
 526                                 encode_putfh_maxsz + \
 527                                 encode_lockt_maxsz)
 528 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 529                                  decode_sequence_maxsz + \
 530                                  decode_putfh_maxsz + \
 531                                  decode_lockt_maxsz)
 532 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 533                                 encode_sequence_maxsz + \
 534                                 encode_putfh_maxsz + \
 535                                 encode_locku_maxsz)
 536 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 537                                 decode_sequence_maxsz + \
 538                                 decode_putfh_maxsz + \
 539                                 decode_locku_maxsz)
 540 #define NFS4_enc_release_lockowner_sz \
 541                                 (compound_encode_hdr_maxsz + \
 542                                  encode_lockowner_maxsz)
 543 #define NFS4_dec_release_lockowner_sz \
 544                                 (compound_decode_hdr_maxsz + \
 545                                  decode_lockowner_maxsz)
 546 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 547                                 encode_sequence_maxsz + \
 548                                 encode_putfh_maxsz + \
 549                                 encode_access_maxsz + \
 550                                 encode_getattr_maxsz)
 551 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 552                                 decode_sequence_maxsz + \
 553                                 decode_putfh_maxsz + \
 554                                 decode_access_maxsz + \
 555                                 decode_getattr_maxsz)
 556 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 557                                 encode_sequence_maxsz + \
 558                                 encode_putfh_maxsz + \
 559                                 encode_getattr_maxsz)
 560 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 561                                 decode_sequence_maxsz + \
 562                                 decode_putfh_maxsz + \
 563                                 decode_getattr_maxsz)
 564 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 565                                 encode_sequence_maxsz + \
 566                                 encode_putfh_maxsz + \
 567                                 encode_lookup_maxsz + \
 568                                 encode_getattr_maxsz + \
 569                                 encode_getfh_maxsz)
 570 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 571                                 decode_sequence_maxsz + \
 572                                 decode_putfh_maxsz + \
 573                                 decode_lookup_maxsz + \
 574                                 decode_getattr_maxsz + \
 575                                 decode_getfh_maxsz)
 576 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 577                                 encode_sequence_maxsz + \
 578                                 encode_putrootfh_maxsz + \
 579                                 encode_getattr_maxsz + \
 580                                 encode_getfh_maxsz)
 581 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 582                                 decode_sequence_maxsz + \
 583                                 decode_putrootfh_maxsz + \
 584                                 decode_getattr_maxsz + \
 585                                 decode_getfh_maxsz)
 586 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 587                                 encode_sequence_maxsz + \
 588                                 encode_putfh_maxsz + \
 589                                 encode_remove_maxsz + \
 590                                 encode_getattr_maxsz)
 591 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 592                                 decode_sequence_maxsz + \
 593                                 decode_putfh_maxsz + \
 594                                 decode_remove_maxsz + \
 595                                 decode_getattr_maxsz)
 596 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 597                                 encode_sequence_maxsz + \
 598                                 encode_putfh_maxsz + \
 599                                 encode_savefh_maxsz + \
 600                                 encode_putfh_maxsz + \
 601                                 encode_rename_maxsz + \
 602                                 encode_getattr_maxsz + \
 603                                 encode_restorefh_maxsz + \
 604                                 encode_getattr_maxsz)
 605 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 606                                 decode_sequence_maxsz + \
 607                                 decode_putfh_maxsz + \
 608                                 decode_savefh_maxsz + \
 609                                 decode_putfh_maxsz + \
 610                                 decode_rename_maxsz + \
 611                                 decode_getattr_maxsz + \
 612                                 decode_restorefh_maxsz + \
 613                                 decode_getattr_maxsz)
 614 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 615                                 encode_sequence_maxsz + \
 616                                 encode_putfh_maxsz + \
 617                                 encode_savefh_maxsz + \
 618                                 encode_putfh_maxsz + \
 619                                 encode_link_maxsz + \
 620                                 decode_getattr_maxsz + \
 621                                 encode_restorefh_maxsz + \
 622                                 decode_getattr_maxsz)
 623 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 624                                 decode_sequence_maxsz + \
 625                                 decode_putfh_maxsz + \
 626                                 decode_savefh_maxsz + \
 627                                 decode_putfh_maxsz + \
 628                                 decode_link_maxsz + \
 629                                 decode_getattr_maxsz + \
 630                                 decode_restorefh_maxsz + \
 631                                 decode_getattr_maxsz)
 632 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 633                                 encode_sequence_maxsz + \
 634                                 encode_putfh_maxsz + \
 635                                 encode_symlink_maxsz + \
 636                                 encode_getattr_maxsz + \
 637                                 encode_getfh_maxsz)
 638 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 639                                 decode_sequence_maxsz + \
 640                                 decode_putfh_maxsz + \
 641                                 decode_symlink_maxsz + \
 642                                 decode_getattr_maxsz + \
 643                                 decode_getfh_maxsz)
 644 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 645                                 encode_sequence_maxsz + \
 646                                 encode_putfh_maxsz + \
 647                                 encode_savefh_maxsz + \
 648                                 encode_create_maxsz + \
 649                                 encode_getfh_maxsz + \
 650                                 encode_getattr_maxsz + \
 651                                 encode_restorefh_maxsz + \
 652                                 encode_getattr_maxsz)
 653 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 654                                 decode_sequence_maxsz + \
 655                                 decode_putfh_maxsz + \
 656                                 decode_savefh_maxsz + \
 657                                 decode_create_maxsz + \
 658                                 decode_getfh_maxsz + \
 659                                 decode_getattr_maxsz + \
 660                                 decode_restorefh_maxsz + \
 661                                 decode_getattr_maxsz)
 662 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 663                                 encode_sequence_maxsz + \
 664                                 encode_putfh_maxsz + \
 665                                 encode_getattr_maxsz)
 666 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 667                                 decode_sequence_maxsz + \
 668                                 decode_putfh_maxsz + \
 669                                 decode_getattr_maxsz)
 670 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 671                                 encode_sequence_maxsz + \
 672                                 encode_putfh_maxsz + \
 673                                 encode_statfs_maxsz)
 674 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 675                                 decode_sequence_maxsz + \
 676                                 decode_putfh_maxsz + \
 677                                 decode_statfs_maxsz)
 678 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 679                                 encode_sequence_maxsz + \
 680                                 encode_putfh_maxsz + \
 681                                 encode_getattr_maxsz)
 682 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 683                                 decode_sequence_maxsz + \
 684                                 decode_putfh_maxsz + \
 685                                 decode_getattr_maxsz)
 686 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 687                                 encode_sequence_maxsz + \
 688                                 encode_putfh_maxsz + \
 689                                 encode_delegreturn_maxsz + \
 690                                 encode_getattr_maxsz)
 691 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 692                                 decode_sequence_maxsz + \
 693                                 decode_delegreturn_maxsz + \
 694                                 decode_getattr_maxsz)
 695 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 696                                 encode_sequence_maxsz + \
 697                                 encode_putfh_maxsz + \
 698                                 encode_getacl_maxsz)
 699 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 700                                 decode_sequence_maxsz + \
 701                                 decode_putfh_maxsz + \
 702                                 decode_getacl_maxsz)
 703 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 704                                 encode_sequence_maxsz + \
 705                                 encode_putfh_maxsz + \
 706                                 encode_setacl_maxsz)
 707 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 708                                 decode_sequence_maxsz + \
 709                                 decode_putfh_maxsz + \
 710                                 decode_setacl_maxsz)
 711 #define NFS4_enc_fs_locations_sz \
 712                                 (compound_encode_hdr_maxsz + \
 713                                  encode_sequence_maxsz + \
 714                                  encode_putfh_maxsz + \
 715                                  encode_lookup_maxsz + \
 716                                  encode_fs_locations_maxsz)
 717 #define NFS4_dec_fs_locations_sz \
 718                                 (compound_decode_hdr_maxsz + \
 719                                  decode_sequence_maxsz + \
 720                                  decode_putfh_maxsz + \
 721                                  decode_lookup_maxsz + \
 722                                  decode_fs_locations_maxsz)
 723 #define NFS4_enc_secinfo_sz     (compound_encode_hdr_maxsz + \
 724                                 encode_sequence_maxsz + \
 725                                 encode_putfh_maxsz + \
 726                                 encode_secinfo_maxsz)
 727 #define NFS4_dec_secinfo_sz     (compound_decode_hdr_maxsz + \
 728                                 decode_sequence_maxsz + \
 729                                 decode_putfh_maxsz + \
 730                                 decode_secinfo_maxsz)
 731 #if defined(CONFIG_NFS_V4_1)
 732 #define NFS4_enc_exchange_id_sz \
 733                                 (compound_encode_hdr_maxsz + \
 734                                  encode_exchange_id_maxsz)
 735 #define NFS4_dec_exchange_id_sz \
 736                                 (compound_decode_hdr_maxsz + \
 737                                  decode_exchange_id_maxsz)
 738 #define NFS4_enc_create_session_sz \
 739                                 (compound_encode_hdr_maxsz + \
 740                                  encode_create_session_maxsz)
 741 #define NFS4_dec_create_session_sz \
 742                                 (compound_decode_hdr_maxsz + \
 743                                  decode_create_session_maxsz)
 744 #define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
 745                                          encode_destroy_session_maxsz)
 746 #define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
 747                                          decode_destroy_session_maxsz)
 748 #define NFS4_enc_sequence_sz \
 749                                 (compound_decode_hdr_maxsz + \
 750                                  encode_sequence_maxsz)
 751 #define NFS4_dec_sequence_sz \
 752                                 (compound_decode_hdr_maxsz + \
 753                                  decode_sequence_maxsz)
 754 #define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
 755                                          encode_sequence_maxsz + \
 756                                          encode_putrootfh_maxsz + \
 757                                          encode_fsinfo_maxsz)
 758 #define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
 759                                          decode_sequence_maxsz + \
 760                                          decode_putrootfh_maxsz + \
 761                                          decode_fsinfo_maxsz)
 762 #define NFS4_enc_reclaim_complete_sz    (compound_encode_hdr_maxsz + \
 763                                          encode_sequence_maxsz + \
 764                                          encode_reclaim_complete_maxsz)
 765 #define NFS4_dec_reclaim_complete_sz    (compound_decode_hdr_maxsz + \
 766                                          decode_sequence_maxsz + \
 767                                          decode_reclaim_complete_maxsz)
 768 #define NFS4_enc_getdevicelist_sz (compound_encode_hdr_maxsz + \
 769                                 encode_sequence_maxsz + \
 770                                 encode_putfh_maxsz + \
 771                                 encode_getdevicelist_maxsz)
 772 #define NFS4_dec_getdevicelist_sz (compound_decode_hdr_maxsz + \
 773                                 decode_sequence_maxsz + \
 774                                 decode_putfh_maxsz + \
 775                                 decode_getdevicelist_maxsz)
 776 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
 777                                 encode_sequence_maxsz +\
 778                                 encode_getdeviceinfo_maxsz)
 779 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
 780                                 decode_sequence_maxsz + \
 781                                 decode_getdeviceinfo_maxsz)
 782 #define NFS4_enc_layoutget_sz   (compound_encode_hdr_maxsz + \
 783                                 encode_sequence_maxsz + \
 784                                 encode_putfh_maxsz +        \
 785                                 encode_layoutget_maxsz)
 786 #define NFS4_dec_layoutget_sz   (compound_decode_hdr_maxsz + \
 787                                 decode_sequence_maxsz + \
 788                                 decode_putfh_maxsz +        \
 789                                 decode_layoutget_maxsz)
 790 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
 791                                 encode_sequence_maxsz +\
 792                                 encode_putfh_maxsz + \
 793                                 encode_layoutcommit_maxsz + \
 794                                 encode_getattr_maxsz)
 795 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
 796                                 decode_sequence_maxsz + \
 797                                 decode_putfh_maxsz + \
 798                                 decode_layoutcommit_maxsz + \
 799                                 decode_getattr_maxsz)
 800 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
 801                                 encode_sequence_maxsz + \
 802                                 encode_putfh_maxsz + \
 803                                 encode_layoutreturn_maxsz)
 804 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
 805                                 decode_sequence_maxsz + \
 806                                 decode_putfh_maxsz + \
 807                                 decode_layoutreturn_maxsz)
 808 #define NFS4_enc_secinfo_no_name_sz     (compound_encode_hdr_maxsz + \
 809                                         encode_sequence_maxsz + \
 810                                         encode_putrootfh_maxsz +\
 811                                         encode_secinfo_no_name_maxsz)
 812 #define NFS4_dec_secinfo_no_name_sz     (compound_decode_hdr_maxsz + \
 813                                         decode_sequence_maxsz + \
 814                                         decode_putrootfh_maxsz + \
 815                                         decode_secinfo_no_name_maxsz)
 816 #define NFS4_enc_test_stateid_sz        (compound_encode_hdr_maxsz + \
 817                                          encode_sequence_maxsz + \
 818                                          encode_test_stateid_maxsz)
 819 #define NFS4_dec_test_stateid_sz        (compound_decode_hdr_maxsz + \
 820                                          decode_sequence_maxsz + \
 821                                          decode_test_stateid_maxsz)
 822 #define NFS4_enc_free_stateid_sz        (compound_encode_hdr_maxsz + \
 823                                          encode_sequence_maxsz + \
 824                                          encode_free_stateid_maxsz)
 825 #define NFS4_dec_free_stateid_sz        (compound_decode_hdr_maxsz + \
 826                                          decode_sequence_maxsz + \
 827                                          decode_free_stateid_maxsz)
 828
 829 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 830                                       compound_encode_hdr_maxsz +
 831                                       encode_sequence_maxsz +
 832                                       encode_putfh_maxsz +
 833                                       encode_getattr_maxsz) *
 834                                      XDR_UNIT);
 835
 836 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 837                                      compound_decode_hdr_maxsz +
 838                                      decode_sequence_maxsz +
 839                                      decode_putfh_maxsz) *
 840                                     XDR_UNIT);
 841 #endif /* CONFIG_NFS_V4_1 */
 842
 843 static const umode_t nfs_type2fmt[] = {
 844         [NF4BAD] = 0,
 845         [NF4REG] = S_IFREG,
 846         [NF4DIR] = S_IFDIR,
 847         [NF4BLK] = S_IFBLK,
 848         [NF4CHR] = S_IFCHR,
 849         [NF4LNK] = S_IFLNK,
 850         [NF4SOCK] = S_IFSOCK,
 851         [NF4FIFO] = S_IFIFO,
 852         [NF4ATTRDIR] = 0,
 853         [NF4NAMEDATTR] = 0,
 854 };
 855
 856 struct compound_hdr {
 857         int32_t         status;
 858         uint32_t        nops;
 859         __be32 *        nops_p;
 860         uint32_t        taglen;
 861         char *          tag;
 862         uint32_t        replen;         /* expected reply words */
 863         u32             minorversion;
 864 };
 865
 866 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
 867 {
 868         __be32 *p = xdr_reserve_space(xdr, nbytes);
 869         BUG_ON(!p);
 870         return p;
 871 }
 872
 873 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 874 {
 875         __be32 *p;
 876
 877         p = xdr_reserve_space(xdr, 4 + len);
 878         BUG_ON(p == NULL);
 879         xdr_encode_opaque(p, str, len);
 880 }
 881
 882 static void encode_compound_hdr(struct xdr_stream *xdr,
 883                                 struct rpc_rqst *req,
 884                                 struct compound_hdr *hdr)
 885 {
 886         __be32 *p;
 887         struct rpc_auth *auth = req->rq_cred->cr_auth;
 888
 889         /* initialize running count of expected bytes in reply.
 890          * NOTE: the replied tag SHOULD be the same is the one sent,
 891          * but this is not required as a MUST for the server to do so. */
 892         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
 893
 894         dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
 895         BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
 896         p = reserve_space(xdr, 4 + hdr->taglen + 8);
 897         p = xdr_encode_opaque(p, hdr->tag, hdr->taglen);
 898         *p++ = cpu_to_be32(hdr->minorversion);
 899         hdr->nops_p = p;
 900         *p = cpu_to_be32(hdr->nops);
 901 }
 902
 903 static void encode_nops(struct compound_hdr *hdr)
 904 {
 905         BUG_ON(hdr->nops > NFS4_MAX_OPS);
 906         *hdr->nops_p = htonl(hdr->nops);
 907 }
 908
 909 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 910 {
 911         __be32 *p;
 912
 913         p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
 914         BUG_ON(p == NULL);
 915         xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
 916 }
 917
 918 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
 919 {
 920         char owner_name[IDMAP_NAMESZ];
 921         char owner_group[IDMAP_NAMESZ];
 922         int owner_namelen = 0;
 923         int owner_grouplen = 0;
 924         __be32 *p;
 925         __be32 *q;
 926         int len;
 927         uint32_t bmval0 = 0;
 928         uint32_t bmval1 = 0;
 929
 930         /*
 931          * We reserve enough space to write the entire attribute buffer at once.
 932          * In the worst-case, this would be
 933          *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
 934          *          = 36 bytes, plus any contribution from variable-length fields
 935          *            such as owner/group.
 936          */
 937         len = 16;
 938
 939         /* Sigh */
 940         if (iap->ia_valid & ATTR_SIZE)
 941                 len += 8;
 942         if (iap->ia_valid & ATTR_MODE)
 943                 len += 4;
 944         if (iap->ia_valid & ATTR_UID) {
 945                 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
 946                 if (owner_namelen < 0) {
 947                         dprintk("nfs: couldn't resolve uid %d to string\n",
 948                                         iap->ia_uid);
 949                         /* XXX */
 950                         strcpy(owner_name, "nobody");
 951                         owner_namelen = sizeof("nobody") - 1;
 952                         /* goto out; */
 953                 }
 954                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
 955         }
 956         if (iap->ia_valid & ATTR_GID) {
 957                 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
 958                 if (owner_grouplen < 0) {
 959                         dprintk("nfs: couldn't resolve gid %d to string\n",
 960                                         iap->ia_gid);
 961                         strcpy(owner_group, "nobody");
 962                         owner_grouplen = sizeof("nobody") - 1;
 963                         /* goto out; */
 964                 }
 965                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
 966         }
 967         if (iap->ia_valid & ATTR_ATIME_SET)
 968                 len += 16;
 969         else if (iap->ia_valid & ATTR_ATIME)
 970                 len += 4;
 971         if (iap->ia_valid & ATTR_MTIME_SET)
 972                 len += 16;
 973         else if (iap->ia_valid & ATTR_MTIME)
 974                 len += 4;
 975         p = reserve_space(xdr, len);
 976
 977         /*
 978          * We write the bitmap length now, but leave the bitmap and the attribute
 979          * buffer length to be backfilled at the end of this routine.
 980          */
 981         *p++ = cpu_to_be32(2);
 982         q = p;
 983         p += 3;
 984
 985         if (iap->ia_valid & ATTR_SIZE) {
 986                 bmval0 |= FATTR4_WORD0_SIZE;
 987                 p = xdr_encode_hyper(p, iap->ia_size);
 988         }
 989         if (iap->ia_valid & ATTR_MODE) {
 990                 bmval1 |= FATTR4_WORD1_MODE;
 991                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
 992         }
 993         if (iap->ia_valid & ATTR_UID) {
 994                 bmval1 |= FATTR4_WORD1_OWNER;
 995                 p = xdr_encode_opaque(p, owner_name, owner_namelen);
 996         }
 997         if (iap->ia_valid & ATTR_GID) {
 998                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
 999                 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1000         }
1001         if (iap->ia_valid & ATTR_ATIME_SET) {
1002                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
1003                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1004                 *p++ = cpu_to_be32(0);
1005                 *p++ = cpu_to_be32(iap->ia_atime.tv_sec);
1006                 *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
1007         }
1008         else if (iap->ia_valid & ATTR_ATIME) {
1009                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
1010                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1011         }
1012         if (iap->ia_valid & ATTR_MTIME_SET) {
1013                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
1014                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1015                 *p++ = cpu_to_be32(0);
1016                 *p++ = cpu_to_be32(iap->ia_mtime.tv_sec);
1017                 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1018         }
1019         else if (iap->ia_valid & ATTR_MTIME) {
1020                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
1021                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1022         }
1023
1024         /*
1025          * Now we backfill the bitmap and the attribute buffer length.
1026          */
1027         if (len != ((char *)p - (char *)q) + 4) {
1028                 printk(KERN_ERR "nfs: Attr length error, %u != %Zu\n",
1029                                 len, ((char *)p - (char *)q) + 4);
1030                 BUG();
1031         }
1032         len = (char *)p - (char *)q - 12;
1033         *q++ = htonl(bmval0);
1034         *q++ = htonl(bmval1);
1035         *q = htonl(len);
1036
1037 /* out: */
1038 }
1039
1040 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1041 {
1042         __be32 *p;
1043
1044         p = reserve_space(xdr, 8);
1045         *p++ = cpu_to_be32(OP_ACCESS);
1046         *p = cpu_to_be32(access);
1047         hdr->nops++;
1048         hdr->replen += decode_access_maxsz;
1049 }
1050
1051 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1052 {
1053         __be32 *p;
1054
1055         p = reserve_space(xdr, 8+NFS4_STATEID_SIZE);
1056         *p++ = cpu_to_be32(OP_CLOSE);
1057         *p++ = cpu_to_be32(arg->seqid->sequence->counter);
1058         xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1059         hdr->nops++;
1060         hdr->replen += decode_close_maxsz;
1061 }
1062
1063 static void encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1064 {
1065         __be32 *p;
1066
1067         p = reserve_space(xdr, 16);
1068         *p++ = cpu_to_be32(OP_COMMIT);
1069         p = xdr_encode_hyper(p, args->offset);
1070         *p = cpu_to_be32(args->count);
1071         hdr->nops++;
1072         hdr->replen += decode_commit_maxsz;
1073 }
1074
1075 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1076 {
1077         __be32 *p;
1078
1079         p = reserve_space(xdr, 8);
1080         *p++ = cpu_to_be32(OP_CREATE);
1081         *p = cpu_to_be32(create->ftype);
1082
1083         switch (create->ftype) {
1084         case NF4LNK:
1085                 p = reserve_space(xdr, 4);
1086                 *p = cpu_to_be32(create->u.symlink.len);
1087                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
1088                 break;
1089
1090         case NF4BLK: case NF4CHR:
1091                 p = reserve_space(xdr, 8);
1092                 *p++ = cpu_to_be32(create->u.device.specdata1);
1093                 *p = cpu_to_be32(create->u.device.specdata2);
1094                 break;
1095
1096         default:
1097                 break;
1098         }
1099
1100         encode_string(xdr, create->name->len, create->name->name);
1101         hdr->nops++;
1102         hdr->replen += decode_create_maxsz;
1103
1104         encode_attrs(xdr, create->attrs, create->server);
1105 }
1106
1107 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1108 {
1109         __be32 *p;
1110
1111         p = reserve_space(xdr, 12);
1112         *p++ = cpu_to_be32(OP_GETATTR);
1113         *p++ = cpu_to_be32(1);
1114         *p = cpu_to_be32(bitmap);
1115         hdr->nops++;
1116         hdr->replen += decode_getattr_maxsz;
1117 }
1118
1119 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1120 {
1121         __be32 *p;
1122
1123         p = reserve_space(xdr, 16);
1124         *p++ = cpu_to_be32(OP_GETATTR);
1125         *p++ = cpu_to_be32(2);
1126         *p++ = cpu_to_be32(bm0);
1127         *p = cpu_to_be32(bm1);
1128         hdr->nops++;
1129         hdr->replen += decode_getattr_maxsz;
1130 }
1131
1132 static void
1133 encode_getattr_three(struct xdr_stream *xdr,
1134                      uint32_t bm0, uint32_t bm1, uint32_t bm2,
1135                      struct compound_hdr *hdr)
1136 {
1137         __be32 *p;
1138
1139         p = reserve_space(xdr, 4);
1140         *p = cpu_to_be32(OP_GETATTR);
1141         if (bm2) {
1142                 p = reserve_space(xdr, 16);
1143                 *p++ = cpu_to_be32(3);
1144                 *p++ = cpu_to_be32(bm0);
1145                 *p++ = cpu_to_be32(bm1);
1146                 *p = cpu_to_be32(bm2);
1147         } else if (bm1) {
1148                 p = reserve_space(xdr, 12);
1149                 *p++ = cpu_to_be32(2);
1150                 *p++ = cpu_to_be32(bm0);
1151                 *p = cpu_to_be32(bm1);
1152         } else {
1153                 p = reserve_space(xdr, 8);
1154                 *p++ = cpu_to_be32(1);
1155                 *p = cpu_to_be32(bm0);
1156         }
1157         hdr->nops++;
1158         hdr->replen += decode_getattr_maxsz;
1159 }
1160
1161 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1162 {
1163         encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1164                            bitmask[1] & nfs4_fattr_bitmap[1], hdr);
1165 }
1166
1167 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1168 {
1169         encode_getattr_three(xdr,
1170                              bitmask[0] & nfs4_fsinfo_bitmap[0],
1171                              bitmask[1] & nfs4_fsinfo_bitmap[1],
1172                              bitmask[2] & nfs4_fsinfo_bitmap[2],
1173                              hdr);
1174 }
1175
1176 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1177 {
1178         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1179                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1180 }
1181
1182 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1183 {
1184         __be32 *p;
1185
1186         p = reserve_space(xdr, 4);
1187         *p = cpu_to_be32(OP_GETFH);
1188         hdr->nops++;
1189         hdr->replen += decode_getfh_maxsz;
1190 }
1191
1192 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1193 {
1194         __be32 *p;
1195
1196         p = reserve_space(xdr, 8 + name->len);
1197         *p++ = cpu_to_be32(OP_LINK);
1198         xdr_encode_opaque(p, name->name, name->len);
1199         hdr->nops++;
1200         hdr->replen += decode_link_maxsz;
1201 }
1202
1203 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1204 {
1205         if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
1206                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1207         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1208 }
1209
1210 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1211 {
1212         if (fl->fl_end == OFFSET_MAX)
1213                 return ~(uint64_t)0;
1214         return fl->fl_end - fl->fl_start + 1;
1215 }
1216
1217 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1218 {
1219         __be32 *p;
1220
1221         p = reserve_space(xdr, 32);
1222         p = xdr_encode_hyper(p, lowner->clientid);
1223         *p++ = cpu_to_be32(20);
1224         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1225         *p++ = cpu_to_be32(lowner->s_dev);
1226         xdr_encode_hyper(p, lowner->id);
1227 }
1228
1229 /*
1230  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1231  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1232  */
1233 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1234 {
1235         __be32 *p;
1236
1237         p = reserve_space(xdr, 32);
1238         *p++ = cpu_to_be32(OP_LOCK);
1239         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1240         *p++ = cpu_to_be32(args->reclaim);
1241         p = xdr_encode_hyper(p, args->fl->fl_start);
1242         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1243         *p = cpu_to_be32(args->new_lock_owner);
1244         if (args->new_lock_owner){
1245                 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1246                 *p++ = cpu_to_be32(args->open_seqid->sequence->counter);
1247                 p = xdr_encode_opaque_fixed(p, args->open_stateid->data, NFS4_STATEID_SIZE);
1248                 *p++ = cpu_to_be32(args->lock_seqid->sequence->counter);
1249                 encode_lockowner(xdr, &args->lock_owner);
1250         }
1251         else {
1252                 p = reserve_space(xdr, NFS4_STATEID_SIZE+4);
1253                 p = xdr_encode_opaque_fixed(p, args->lock_stateid->data, NFS4_STATEID_SIZE);
1254                 *p = cpu_to_be32(args->lock_seqid->sequence->counter);
1255         }
1256         hdr->nops++;
1257         hdr->replen += decode_lock_maxsz;
1258 }
1259
1260 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1261 {
1262         __be32 *p;
1263
1264         p = reserve_space(xdr, 24);
1265         *p++ = cpu_to_be32(OP_LOCKT);
1266         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1267         p = xdr_encode_hyper(p, args->fl->fl_start);
1268         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1269         encode_lockowner(xdr, &args->lock_owner);
1270         hdr->nops++;
1271         hdr->replen += decode_lockt_maxsz;
1272 }
1273
1274 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1275 {
1276         __be32 *p;
1277
1278         p = reserve_space(xdr, 12+NFS4_STATEID_SIZE+16);
1279         *p++ = cpu_to_be32(OP_LOCKU);
1280         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1281         *p++ = cpu_to_be32(args->seqid->sequence->counter);
1282         p = xdr_encode_opaque_fixed(p, args->stateid->data, NFS4_STATEID_SIZE);
1283         p = xdr_encode_hyper(p, args->fl->fl_start);
1284         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1285         hdr->nops++;
1286         hdr->replen += decode_locku_maxsz;
1287 }
1288
1289 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1290 {
1291         __be32 *p;
1292
1293         p = reserve_space(xdr, 4);
1294         *p = cpu_to_be32(OP_RELEASE_LOCKOWNER);
1295         encode_lockowner(xdr, lowner);
1296         hdr->nops++;
1297         hdr->replen += decode_release_lockowner_maxsz;
1298 }
1299
1300 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1301 {
1302         int len = name->len;
1303         __be32 *p;
1304
1305         p = reserve_space(xdr, 8 + len);
1306         *p++ = cpu_to_be32(OP_LOOKUP);
1307         xdr_encode_opaque(p, name->name, len);
1308         hdr->nops++;
1309         hdr->replen += decode_lookup_maxsz;
1310 }
1311
1312 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1313 {
1314         __be32 *p;
1315
1316         p = reserve_space(xdr, 8);
1317         switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1318         case FMODE_READ:
1319                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1320                 break;
1321         case FMODE_WRITE:
1322                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1323                 break;
1324         case FMODE_READ|FMODE_WRITE:
1325                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1326                 break;
1327         default:
1328                 *p++ = cpu_to_be32(0);
1329         }
1330         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1331 }
1332
1333 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1334 {
1335         __be32 *p;
1336  /*
1337  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1338  * owner 4 = 32
1339  */
1340         p = reserve_space(xdr, 8);
1341         *p++ = cpu_to_be32(OP_OPEN);
1342         *p = cpu_to_be32(arg->seqid->sequence->counter);
1343         encode_share_access(xdr, arg->fmode);
1344         p = reserve_space(xdr, 32);
1345         p = xdr_encode_hyper(p, arg->clientid);
1346         *p++ = cpu_to_be32(20);
1347         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1348         *p++ = cpu_to_be32(arg->server->s_dev);
1349         xdr_encode_hyper(p, arg->id);
1350 }
1351
1352 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1353 {
1354         __be32 *p;
1355         struct nfs_client *clp;
1356
1357         p = reserve_space(xdr, 4);
1358         switch(arg->open_flags & O_EXCL) {
1359         case 0:
1360                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1361                 encode_attrs(xdr, arg->u.attrs, arg->server);
1362                 break;
1363         default:
1364                 clp = arg->server->nfs_client;
1365                 if (clp->cl_mvops->minor_version > 0) {
1366                         if (nfs4_has_persistent_session(clp)) {
1367                                 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1368                                 encode_attrs(xdr, arg->u.attrs, arg->server);
1369                         } else {
1370                                 struct iattr dummy;
1371
1372                                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1373                                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1374                                 dummy.ia_valid = 0;
1375                                 encode_attrs(xdr, &dummy, arg->server);
1376                         }
1377                 } else {
1378                         *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1379                         encode_nfs4_verifier(xdr, &arg->u.verifier);
1380                 }
1381         }
1382 }
1383
1384 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1385 {
1386         __be32 *p;
1387
1388         p = reserve_space(xdr, 4);
1389         switch (arg->open_flags & O_CREAT) {
1390         case 0:
1391                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1392                 break;
1393         default:
1394                 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1395                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1396                 encode_createmode(xdr, arg);
1397         }
1398 }
1399
1400 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1401 {
1402         __be32 *p;
1403
1404         p = reserve_space(xdr, 4);
1405         switch (delegation_type) {
1406         case 0:
1407                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1408                 break;
1409         case FMODE_READ:
1410                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1411                 break;
1412         case FMODE_WRITE|FMODE_READ:
1413                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1414                 break;
1415         default:
1416                 BUG();
1417         }
1418 }
1419
1420 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1421 {
1422         __be32 *p;
1423
1424         p = reserve_space(xdr, 4);
1425         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1426         encode_string(xdr, name->len, name->name);
1427 }
1428
1429 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1430 {
1431         __be32 *p;
1432
1433         p = reserve_space(xdr, 4);
1434         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1435         encode_delegation_type(xdr, type);
1436 }
1437
1438 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1439 {
1440         __be32 *p;
1441
1442         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1443         *p++ = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1444         xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1445         encode_string(xdr, name->len, name->name);
1446 }
1447
1448 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1449 {
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         hdr->nops++;
1466         hdr->replen += decode_open_maxsz;
1467 }
1468
1469 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1470 {
1471         __be32 *p;
1472
1473         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1474         *p++ = cpu_to_be32(OP_OPEN_CONFIRM);
1475         p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1476         *p = cpu_to_be32(arg->seqid->sequence->counter);
1477         hdr->nops++;
1478         hdr->replen += decode_open_confirm_maxsz;
1479 }
1480
1481 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1482 {
1483         __be32 *p;
1484
1485         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1486         *p++ = cpu_to_be32(OP_OPEN_DOWNGRADE);
1487         p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1488         *p = cpu_to_be32(arg->seqid->sequence->counter);
1489         encode_share_access(xdr, arg->fmode);
1490         hdr->nops++;
1491         hdr->replen += decode_open_downgrade_maxsz;
1492 }
1493
1494 static void
1495 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1496 {
1497         int len = fh->size;
1498         __be32 *p;
1499
1500         p = reserve_space(xdr, 8 + len);
1501         *p++ = cpu_to_be32(OP_PUTFH);
1502         xdr_encode_opaque(p, fh->data, len);
1503         hdr->nops++;
1504         hdr->replen += decode_putfh_maxsz;
1505 }
1506
1507 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1508 {
1509         __be32 *p;
1510
1511         p = reserve_space(xdr, 4);
1512         *p = cpu_to_be32(OP_PUTROOTFH);
1513         hdr->nops++;
1514         hdr->replen += decode_putrootfh_maxsz;
1515 }
1516
1517 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx, const struct nfs_lock_context *l_ctx, int zero_seqid)
1518 {
1519         nfs4_stateid stateid;
1520         __be32 *p;
1521
1522         p = reserve_space(xdr, NFS4_STATEID_SIZE);
1523         if (ctx->state != NULL) {
1524                 nfs4_copy_stateid(&stateid, ctx->state, l_ctx->lockowner, l_ctx->pid);
1525                 if (zero_seqid)
1526                         stateid.stateid.seqid = 0;
1527                 xdr_encode_opaque_fixed(p, stateid.data, NFS4_STATEID_SIZE);
1528         } else
1529                 xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1530 }
1531
1532 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1533 {
1534         __be32 *p;
1535
1536         p = reserve_space(xdr, 4);
1537         *p = cpu_to_be32(OP_READ);
1538
1539         encode_stateid(xdr, args->context, args->lock_context,
1540                        hdr->minorversion);
1541
1542         p = reserve_space(xdr, 12);
1543         p = xdr_encode_hyper(p, args->offset);
1544         *p = cpu_to_be32(args->count);
1545         hdr->nops++;
1546         hdr->replen += decode_read_maxsz;
1547 }
1548
1549 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1550 {
1551         uint32_t attrs[2] = {
1552                 FATTR4_WORD0_RDATTR_ERROR,
1553                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1554         };
1555         uint32_t dircount = readdir->count >> 1;
1556         __be32 *p;
1557
1558         if (readdir->plus) {
1559                 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1560                         FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1561                 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1562                         FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1563                         FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1564                         FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1565                 dircount >>= 1;
1566         }
1567         /* Use mounted_on_fileid only if the server supports it */
1568         if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1569                 attrs[0] |= FATTR4_WORD0_FILEID;
1570
1571         p = reserve_space(xdr, 12+NFS4_VERIFIER_SIZE+20);
1572         *p++ = cpu_to_be32(OP_READDIR);
1573         p = xdr_encode_hyper(p, readdir->cookie);
1574         p = xdr_encode_opaque_fixed(p, readdir->verifier.data, NFS4_VERIFIER_SIZE);
1575         *p++ = cpu_to_be32(dircount);
1576         *p++ = cpu_to_be32(readdir->count);
1577         *p++ = cpu_to_be32(2);
1578
1579         *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1580         *p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1581         hdr->nops++;
1582         hdr->replen += decode_readdir_maxsz;
1583         dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1584                         __func__,
1585                         (unsigned long long)readdir->cookie,
1586                         ((u32 *)readdir->verifier.data)[0],
1587                         ((u32 *)readdir->verifier.data)[1],
1588                         attrs[0] & readdir->bitmask[0],
1589                         attrs[1] & readdir->bitmask[1]);
1590 }
1591
1592 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1593 {
1594         __be32 *p;
1595
1596         p = reserve_space(xdr, 4);
1597         *p = cpu_to_be32(OP_READLINK);
1598         hdr->nops++;
1599         hdr->replen += decode_readlink_maxsz;
1600 }
1601
1602 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1603 {
1604         __be32 *p;
1605
1606         p = reserve_space(xdr, 8 + name->len);
1607         *p++ = cpu_to_be32(OP_REMOVE);
1608         xdr_encode_opaque(p, name->name, name->len);
1609         hdr->nops++;
1610         hdr->replen += decode_remove_maxsz;
1611 }
1612
1613 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1614 {
1615         __be32 *p;
1616
1617         p = reserve_space(xdr, 4);
1618         *p = cpu_to_be32(OP_RENAME);
1619         encode_string(xdr, oldname->len, oldname->name);
1620         encode_string(xdr, newname->len, newname->name);
1621         hdr->nops++;
1622         hdr->replen += decode_rename_maxsz;
1623 }
1624
1625 static void encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid, struct compound_hdr *hdr)
1626 {
1627         __be32 *p;
1628
1629         p = reserve_space(xdr, 12);
1630         *p++ = cpu_to_be32(OP_RENEW);
1631         xdr_encode_hyper(p, client_stateid->cl_clientid);
1632         hdr->nops++;
1633         hdr->replen += decode_renew_maxsz;
1634 }
1635
1636 static void
1637 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1638 {
1639         __be32 *p;
1640
1641         p = reserve_space(xdr, 4);
1642         *p = cpu_to_be32(OP_RESTOREFH);
1643         hdr->nops++;
1644         hdr->replen += decode_restorefh_maxsz;
1645 }
1646
1647 static void
1648 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1649 {
1650         __be32 *p;
1651
1652         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1653         *p++ = cpu_to_be32(OP_SETATTR);
1654         xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1655         p = reserve_space(xdr, 2*4);
1656         *p++ = cpu_to_be32(1);
1657         *p = cpu_to_be32(FATTR4_WORD0_ACL);
1658         BUG_ON(arg->acl_len % 4);
1659         p = reserve_space(xdr, 4);
1660         *p = cpu_to_be32(arg->acl_len);
1661         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1662         hdr->nops++;
1663         hdr->replen += decode_setacl_maxsz;
1664 }
1665
1666 static void
1667 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1668 {
1669         __be32 *p;
1670
1671         p = reserve_space(xdr, 4);
1672         *p = cpu_to_be32(OP_SAVEFH);
1673         hdr->nops++;
1674         hdr->replen += decode_savefh_maxsz;
1675 }
1676
1677 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1678 {
1679         __be32 *p;
1680
1681         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1682         *p++ = cpu_to_be32(OP_SETATTR);
1683         xdr_encode_opaque_fixed(p, arg->stateid.data, NFS4_STATEID_SIZE);
1684         hdr->nops++;
1685         hdr->replen += decode_setattr_maxsz;
1686         encode_attrs(xdr, arg->iap, server);
1687 }
1688
1689 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1690 {
1691         __be32 *p;
1692
1693         p = reserve_space(xdr, 4 + NFS4_VERIFIER_SIZE);
1694         *p++ = cpu_to_be32(OP_SETCLIENTID);
1695         xdr_encode_opaque_fixed(p, setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
1696
1697         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1698         p = reserve_space(xdr, 4);
1699         *p = cpu_to_be32(setclientid->sc_prog);
1700         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1701         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1702         p = reserve_space(xdr, 4);
1703         *p = cpu_to_be32(setclientid->sc_cb_ident);
1704         hdr->nops++;
1705         hdr->replen += decode_setclientid_maxsz;
1706 }
1707
1708 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1709 {
1710         __be32 *p;
1711
1712         p = reserve_space(xdr, 12 + NFS4_VERIFIER_SIZE);
1713         *p++ = cpu_to_be32(OP_SETCLIENTID_CONFIRM);
1714         p = xdr_encode_hyper(p, arg->clientid);
1715         xdr_encode_opaque_fixed(p, arg->confirm.data, NFS4_VERIFIER_SIZE);
1716         hdr->nops++;
1717         hdr->replen += decode_setclientid_confirm_maxsz;
1718 }
1719
1720 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1721 {
1722         __be32 *p;
1723
1724         p = reserve_space(xdr, 4);
1725         *p = cpu_to_be32(OP_WRITE);
1726
1727         encode_stateid(xdr, args->context, args->lock_context,
1728                        hdr->minorversion);
1729
1730         p = reserve_space(xdr, 16);
1731         p = xdr_encode_hyper(p, args->offset);
1732         *p++ = cpu_to_be32(args->stable);
1733         *p = cpu_to_be32(args->count);
1734
1735         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1736         hdr->nops++;
1737         hdr->replen += decode_write_maxsz;
1738 }
1739
1740 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1741 {
1742         __be32 *p;
1743
1744         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1745
1746         *p++ = cpu_to_be32(OP_DELEGRETURN);
1747         xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1748         hdr->nops++;
1749         hdr->replen += decode_delegreturn_maxsz;
1750 }
1751
1752 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1753 {
1754         int len = name->len;
1755         __be32 *p;
1756
1757         p = reserve_space(xdr, 8 + len);
1758         *p++ = cpu_to_be32(OP_SECINFO);
1759         xdr_encode_opaque(p, name->name, len);
1760         hdr->nops++;
1761         hdr->replen += decode_secinfo_maxsz;
1762 }
1763
1764 #if defined(CONFIG_NFS_V4_1)
1765 /* NFSv4.1 operations */
1766 static void encode_exchange_id(struct xdr_stream *xdr,
1767                                struct nfs41_exchange_id_args *args,
1768                                struct compound_hdr *hdr)
1769 {
1770         __be32 *p;
1771
1772         p = reserve_space(xdr, 4 + sizeof(args->verifier->data));
1773         *p++ = cpu_to_be32(OP_EXCHANGE_ID);
1774         xdr_encode_opaque_fixed(p, args->verifier->data, sizeof(args->verifier->data));
1775
1776         encode_string(xdr, args->id_len, args->id);
1777
1778         p = reserve_space(xdr, 12);
1779         *p++ = cpu_to_be32(args->flags);
1780         *p++ = cpu_to_be32(0);  /* zero length state_protect4_a */
1781         *p = cpu_to_be32(0);    /* zero length implementation id array */
1782         hdr->nops++;
1783         hdr->replen += decode_exchange_id_maxsz;
1784 }
1785
1786 static void encode_create_session(struct xdr_stream *xdr,
1787                                   struct nfs41_create_session_args *args,
1788                                   struct compound_hdr *hdr)
1789 {
1790         __be32 *p;
1791         char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1792         uint32_t len;
1793         struct nfs_client *clp = args->client;
1794         u32 max_resp_sz_cached;
1795
1796         /*
1797          * Assumes OPEN is the biggest non-idempotent compound.
1798          * 2 is the verifier.
1799          */
1800         max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1801                               RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1802
1803         len = scnprintf(machine_name, sizeof(machine_name), "%s",
1804                         clp->cl_ipaddr);
1805
1806         p = reserve_space(xdr, 20 + 2*28 + 20 + len + 12);
1807         *p++ = cpu_to_be32(OP_CREATE_SESSION);
1808         p = xdr_encode_hyper(p, clp->cl_clientid);
1809         *p++ = cpu_to_be32(clp->cl_seqid);                      /*Sequence id */
1810         *p++ = cpu_to_be32(args->flags);                        /*flags */
1811
1812         /* Fore Channel */
1813         *p++ = cpu_to_be32(0);                          /* header padding size */
1814         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1815         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1816         *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1817         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1818         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1819         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1820
1821         /* Back Channel */
1822         *p++ = cpu_to_be32(0);                          /* header padding size */
1823         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1824         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1825         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1826         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1827         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1828         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1829
1830         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1831         *p++ = cpu_to_be32(1);
1832         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1833
1834         /* authsys_parms rfc1831 */
1835         *p++ = cpu_to_be32((u32)clp->cl_boot_time.tv_nsec);     /* stamp */
1836         p = xdr_encode_opaque(p, machine_name, len);
1837         *p++ = cpu_to_be32(0);                          /* UID */
1838         *p++ = cpu_to_be32(0);                          /* GID */
1839         *p = cpu_to_be32(0);                            /* No more gids */
1840         hdr->nops++;
1841         hdr->replen += decode_create_session_maxsz;
1842 }
1843
1844 static void encode_destroy_session(struct xdr_stream *xdr,
1845                                    struct nfs4_session *session,
1846                                    struct compound_hdr *hdr)
1847 {
1848         __be32 *p;
1849         p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN);
1850         *p++ = cpu_to_be32(OP_DESTROY_SESSION);
1851         xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1852         hdr->nops++;
1853         hdr->replen += decode_destroy_session_maxsz;
1854 }
1855
1856 static void encode_reclaim_complete(struct xdr_stream *xdr,
1857                                     struct nfs41_reclaim_complete_args *args,
1858                                     struct compound_hdr *hdr)
1859 {
1860         __be32 *p;
1861
1862         p = reserve_space(xdr, 8);
1863         *p++ = cpu_to_be32(OP_RECLAIM_COMPLETE);
1864         *p++ = cpu_to_be32(args->one_fs);
1865         hdr->nops++;
1866         hdr->replen += decode_reclaim_complete_maxsz;
1867 }
1868 #endif /* CONFIG_NFS_V4_1 */
1869
1870 static void encode_sequence(struct xdr_stream *xdr,
1871                             const struct nfs4_sequence_args *args,
1872                             struct compound_hdr *hdr)
1873 {
1874 #if defined(CONFIG_NFS_V4_1)
1875         struct nfs4_session *session = args->sa_session;
1876         struct nfs4_slot_table *tp;
1877         struct nfs4_slot *slot;
1878         __be32 *p;
1879
1880         if (!session)
1881                 return;
1882
1883         tp = &session->fc_slot_table;
1884
1885         WARN_ON(args->sa_slotid == NFS4_MAX_SLOT_TABLE);
1886         slot = tp->slots + args->sa_slotid;
1887
1888         p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN + 16);
1889         *p++ = cpu_to_be32(OP_SEQUENCE);
1890
1891         /*
1892          * Sessionid + seqid + slotid + max slotid + cache_this
1893          */
1894         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1895                 "max_slotid=%d cache_this=%d\n",
1896                 __func__,
1897                 ((u32 *)session->sess_id.data)[0],
1898                 ((u32 *)session->sess_id.data)[1],
1899                 ((u32 *)session->sess_id.data)[2],
1900                 ((u32 *)session->sess_id.data)[3],
1901                 slot->seq_nr, args->sa_slotid,
1902                 tp->highest_used_slotid, args->sa_cache_this);
1903         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1904         *p++ = cpu_to_be32(slot->seq_nr);
1905         *p++ = cpu_to_be32(args->sa_slotid);
1906         *p++ = cpu_to_be32(tp->highest_used_slotid);
1907         *p = cpu_to_be32(args->sa_cache_this);
1908         hdr->nops++;
1909         hdr->replen += decode_sequence_maxsz;
1910 #endif /* CONFIG_NFS_V4_1 */
1911 }
1912
1913 #ifdef CONFIG_NFS_V4_1
1914 static void
1915 encode_getdevicelist(struct xdr_stream *xdr,
1916                      const struct nfs4_getdevicelist_args *args,
1917                      struct compound_hdr *hdr)
1918 {
1919         __be32 *p;
1920         nfs4_verifier dummy = {
1921                 .data = "dummmmmy",
1922         };
1923
1924         p = reserve_space(xdr, 20);
1925         *p++ = cpu_to_be32(OP_GETDEVICELIST);
1926         *p++ = cpu_to_be32(args->layoutclass);
1927         *p++ = cpu_to_be32(NFS4_PNFS_GETDEVLIST_MAXNUM);
1928         xdr_encode_hyper(p, 0ULL);                          /* cookie */
1929         encode_nfs4_verifier(xdr, &dummy);
1930         hdr->nops++;
1931         hdr->replen += decode_getdevicelist_maxsz;
1932 }
1933
1934 static void
1935 encode_getdeviceinfo(struct xdr_stream *xdr,
1936                      const struct nfs4_getdeviceinfo_args *args,
1937                      struct compound_hdr *hdr)
1938 {
1939         __be32 *p;
1940
1941         p = reserve_space(xdr, 16 + NFS4_DEVICEID4_SIZE);
1942         *p++ = cpu_to_be32(OP_GETDEVICEINFO);
1943         p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1944                                     NFS4_DEVICEID4_SIZE);
1945         *p++ = cpu_to_be32(args->pdev->layout_type);
1946         *p++ = cpu_to_be32(args->pdev->pglen);          /* gdia_maxcount */
1947         *p++ = cpu_to_be32(0);                          /* bitmap length 0 */
1948         hdr->nops++;
1949         hdr->replen += decode_getdeviceinfo_maxsz;
1950 }
1951
1952 static void
1953 encode_layoutget(struct xdr_stream *xdr,
1954                       const struct nfs4_layoutget_args *args,
1955                       struct compound_hdr *hdr)
1956 {
1957         __be32 *p;
1958
1959         p = reserve_space(xdr, 44 + NFS4_STATEID_SIZE);
1960         *p++ = cpu_to_be32(OP_LAYOUTGET);
1961         *p++ = cpu_to_be32(0);     /* Signal layout available */
1962         *p++ = cpu_to_be32(args->type);
1963         *p++ = cpu_to_be32(args->range.iomode);
1964         p = xdr_encode_hyper(p, args->range.offset);
1965         p = xdr_encode_hyper(p, args->range.length);
1966         p = xdr_encode_hyper(p, args->minlength);
1967         p = xdr_encode_opaque_fixed(p, &args->stateid.data, NFS4_STATEID_SIZE);
1968         *p = cpu_to_be32(args->maxcount);
1969
1970         dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1971                 __func__,
1972                 args->type,
1973                 args->range.iomode,
1974                 (unsigned long)args->range.offset,
1975                 (unsigned long)args->range.length,
1976                 args->maxcount);
1977         hdr->nops++;
1978         hdr->replen += decode_layoutget_maxsz;
1979 }
1980
1981 static int
1982 encode_layoutcommit(struct xdr_stream *xdr,
1983                     struct inode *inode,
1984                     const struct nfs4_layoutcommit_args *args,
1985                     struct compound_hdr *hdr)
1986 {
1987         __be32 *p;
1988
1989         dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1990                 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1991
1992         p = reserve_space(xdr, 44 + NFS4_STATEID_SIZE);
1993         *p++ = cpu_to_be32(OP_LAYOUTCOMMIT);
1994         /* Only whole file layouts */
1995         p = xdr_encode_hyper(p, 0); /* offset */
1996         p = xdr_encode_hyper(p, args->lastbytewritten + 1);     /* length */
1997         *p++ = cpu_to_be32(0); /* reclaim */
1998         p = xdr_encode_opaque_fixed(p, args->stateid.data, NFS4_STATEID_SIZE);
1999         *p++ = cpu_to_be32(1); /* newoffset = TRUE */
2000         p = xdr_encode_hyper(p, args->lastbytewritten);
2001         *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
2002         *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
2003
2004         if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit)
2005                 NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
2006                         NFS_I(inode)->layout, xdr, args);
2007         else {
2008                 p = reserve_space(xdr, 4);
2009                 *p = cpu_to_be32(0); /* no layout-type payload */
2010         }
2011
2012         hdr->nops++;
2013         hdr->replen += decode_layoutcommit_maxsz;
2014         return 0;
2015 }
2016
2017 static void
2018 encode_layoutreturn(struct xdr_stream *xdr,
2019                     const struct nfs4_layoutreturn_args *args,
2020                     struct compound_hdr *hdr)
2021 {
2022         __be32 *p;
2023
2024         p = reserve_space(xdr, 20);
2025         *p++ = cpu_to_be32(OP_LAYOUTRETURN);
2026         *p++ = cpu_to_be32(0);          /* reclaim. always 0 for now */
2027         *p++ = cpu_to_be32(args->layout_type);
2028         *p++ = cpu_to_be32(IOMODE_ANY);
2029         *p = cpu_to_be32(RETURN_FILE);
2030         p = reserve_space(xdr, 16 + NFS4_STATEID_SIZE);
2031         p = xdr_encode_hyper(p, 0);
2032         p = xdr_encode_hyper(p, NFS4_MAX_UINT64);
2033         spin_lock(&args->inode->i_lock);
2034         xdr_encode_opaque_fixed(p, &args->stateid.data, NFS4_STATEID_SIZE);
2035         spin_unlock(&args->inode->i_lock);
2036         if (NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn) {
2037                 NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn(
2038                         NFS_I(args->inode)->layout, xdr, args);
2039         } else {
2040                 p = reserve_space(xdr, 4);
2041                 *p = cpu_to_be32(0);
2042         }
2043         hdr->nops++;
2044         hdr->replen += decode_layoutreturn_maxsz;
2045 }
2046
2047 static int
2048 encode_secinfo_no_name(struct xdr_stream *xdr,
2049                        const struct nfs41_secinfo_no_name_args *args,
2050                        struct compound_hdr *hdr)
2051 {
2052         __be32 *p;
2053         p = reserve_space(xdr, 8);
2054         *p++ = cpu_to_be32(OP_SECINFO_NO_NAME);
2055         *p++ = cpu_to_be32(args->style);
2056         hdr->nops++;
2057         hdr->replen += decode_secinfo_no_name_maxsz;
2058         return 0;
2059 }
2060
2061 static void encode_test_stateid(struct xdr_stream *xdr,
2062                                 struct nfs41_test_stateid_args *args,
2063                                 struct compound_hdr *hdr)
2064 {
2065         __be32 *p;
2066
2067         p = reserve_space(xdr, 8 + NFS4_STATEID_SIZE);
2068         *p++ = cpu_to_be32(OP_TEST_STATEID);
2069         *p++ = cpu_to_be32(1);
2070         xdr_encode_opaque_fixed(p, args->stateid->data, NFS4_STATEID_SIZE);
2071         hdr->nops++;
2072         hdr->replen += decode_test_stateid_maxsz;
2073 }
2074
2075 static void encode_free_stateid(struct xdr_stream *xdr,
2076                                 struct nfs41_free_stateid_args *args,
2077                                 struct compound_hdr *hdr)
2078 {
2079         __be32 *p;
2080         p = reserve_space(xdr, 4 + NFS4_STATEID_SIZE);
2081         *p++ = cpu_to_be32(OP_FREE_STATEID);
2082         xdr_encode_opaque_fixed(p, args->stateid->data, NFS4_STATEID_SIZE);
2083         hdr->nops++;
2084         hdr->replen += decode_free_stateid_maxsz;
2085 }
2086 #endif /* CONFIG_NFS_V4_1 */
2087
2088 /*
2089  * END OF "GENERIC" ENCODE ROUTINES.
2090  */
2091
2092 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2093 {
2094 #if defined(CONFIG_NFS_V4_1)
2095         if (args->sa_session)
2096                 return args->sa_session->clp->cl_mvops->minor_version;
2097 #endif /* CONFIG_NFS_V4_1 */
2098         return 0;
2099 }
2100
2101 /*
2102  * Encode an ACCESS request
2103  */
2104 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2105                                 const struct nfs4_accessargs *args)
2106 {
2107         struct compound_hdr hdr = {
2108                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2109         };
2110
2111         encode_compound_hdr(xdr, req, &hdr);
2112         encode_sequence(xdr, &args->seq_args, &hdr);
2113         encode_putfh(xdr, args->fh, &hdr);
2114         encode_access(xdr, args->access, &hdr);
2115         encode_getfattr(xdr, args->bitmask, &hdr);
2116         encode_nops(&hdr);
2117 }
2118
2119 /*
2120  * Encode LOOKUP request
2121  */
2122 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2123                                 const struct nfs4_lookup_arg *args)
2124 {
2125         struct compound_hdr hdr = {
2126                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2127         };
2128
2129         encode_compound_hdr(xdr, req, &hdr);
2130         encode_sequence(xdr, &args->seq_args, &hdr);
2131         encode_putfh(xdr, args->dir_fh, &hdr);
2132         encode_lookup(xdr, args->name, &hdr);
2133         encode_getfh(xdr, &hdr);
2134         encode_getfattr(xdr, args->bitmask, &hdr);
2135         encode_nops(&hdr);
2136 }
2137
2138 /*
2139  * Encode LOOKUP_ROOT request
2140  */
2141 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2142                                      struct xdr_stream *xdr,
2143                                      const struct nfs4_lookup_root_arg *args)
2144 {
2145         struct compound_hdr hdr = {
2146                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2147         };
2148
2149         encode_compound_hdr(xdr, req, &hdr);
2150         encode_sequence(xdr, &args->seq_args, &hdr);
2151         encode_putrootfh(xdr, &hdr);
2152         encode_getfh(xdr, &hdr);
2153         encode_getfattr(xdr, args->bitmask, &hdr);
2154         encode_nops(&hdr);
2155 }
2156
2157 /*
2158  * Encode REMOVE request
2159  */
2160 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2161                                 const struct nfs_removeargs *args)
2162 {
2163         struct compound_hdr hdr = {
2164                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2165         };
2166
2167         encode_compound_hdr(xdr, req, &hdr);
2168         encode_sequence(xdr, &args->seq_args, &hdr);
2169         encode_putfh(xdr, args->fh, &hdr);
2170         encode_remove(xdr, &args->name, &hdr);
2171         encode_getfattr(xdr, args->bitmask, &hdr);
2172         encode_nops(&hdr);
2173 }
2174
2175 /*
2176  * Encode RENAME request
2177  */
2178 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2179                                 const struct nfs_renameargs *args)
2180 {
2181         struct compound_hdr hdr = {
2182                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2183         };
2184
2185         encode_compound_hdr(xdr, req, &hdr);
2186         encode_sequence(xdr, &args->seq_args, &hdr);
2187         encode_putfh(xdr, args->old_dir, &hdr);
2188         encode_savefh(xdr, &hdr);
2189         encode_putfh(xdr, args->new_dir, &hdr);
2190         encode_rename(xdr, args->old_name, args->new_name, &hdr);
2191         encode_getfattr(xdr, args->bitmask, &hdr);
2192         encode_restorefh(xdr, &hdr);
2193         encode_getfattr(xdr, args->bitmask, &hdr);
2194         encode_nops(&hdr);
2195 }
2196
2197 /*
2198  * Encode LINK request
2199  */
2200 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2201                              const struct nfs4_link_arg *args)
2202 {
2203         struct compound_hdr hdr = {
2204                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2205         };
2206
2207         encode_compound_hdr(xdr, req, &hdr);
2208         encode_sequence(xdr, &args->seq_args, &hdr);
2209         encode_putfh(xdr, args->fh, &hdr);
2210         encode_savefh(xdr, &hdr);
2211         encode_putfh(xdr, args->dir_fh, &hdr);
2212         encode_link(xdr, args->name, &hdr);
2213         encode_getfattr(xdr, args->bitmask, &hdr);
2214         encode_restorefh(xdr, &hdr);
2215         encode_getfattr(xdr, args->bitmask, &hdr);
2216         encode_nops(&hdr);
2217 }
2218
2219 /*
2220  * Encode CREATE request
2221  */
2222 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2223                                 const struct nfs4_create_arg *args)
2224 {
2225         struct compound_hdr hdr = {
2226                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2227         };
2228
2229         encode_compound_hdr(xdr, req, &hdr);
2230         encode_sequence(xdr, &args->seq_args, &hdr);
2231         encode_putfh(xdr, args->dir_fh, &hdr);
2232         encode_savefh(xdr, &hdr);
2233         encode_create(xdr, args, &hdr);
2234         encode_getfh(xdr, &hdr);
2235         encode_getfattr(xdr, args->bitmask, &hdr);
2236         encode_restorefh(xdr, &hdr);
2237         encode_getfattr(xdr, args->bitmask, &hdr);
2238         encode_nops(&hdr);
2239 }
2240
2241 /*
2242  * Encode SYMLINK request
2243  */
2244 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2245                                  const struct nfs4_create_arg *args)
2246 {
2247         nfs4_xdr_enc_create(req, xdr, args);
2248 }
2249
2250 /*
2251  * Encode GETATTR request
2252  */
2253 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2254                                  const struct nfs4_getattr_arg *args)
2255 {
2256         struct compound_hdr hdr = {
2257                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2258         };
2259
2260         encode_compound_hdr(xdr, req, &hdr);
2261         encode_sequence(xdr, &args->seq_args, &hdr);
2262         encode_putfh(xdr, args->fh, &hdr);
2263         encode_getfattr(xdr, args->bitmask, &hdr);
2264         encode_nops(&hdr);
2265 }
2266
2267 /*
2268  * Encode a CLOSE request
2269  */
2270 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2271                                struct nfs_closeargs *args)
2272 {
2273         struct compound_hdr hdr = {
2274                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2275         };
2276
2277         encode_compound_hdr(xdr, req, &hdr);
2278         encode_sequence(xdr, &args->seq_args, &hdr);
2279         encode_putfh(xdr, args->fh, &hdr);
2280         encode_close(xdr, args, &hdr);
2281         encode_getfattr(xdr, args->bitmask, &hdr);
2282         encode_nops(&hdr);
2283 }
2284
2285 /*
2286  * Encode an OPEN request
2287  */
2288 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2289                               struct nfs_openargs *args)
2290 {
2291         struct compound_hdr hdr = {
2292                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2293         };
2294
2295         encode_compound_hdr(xdr, req, &hdr);
2296         encode_sequence(xdr, &args->seq_args, &hdr);
2297         encode_putfh(xdr, args->fh, &hdr);
2298         encode_savefh(xdr, &hdr);
2299         encode_open(xdr, args, &hdr);
2300         encode_getfh(xdr, &hdr);
2301         encode_getfattr(xdr, args->bitmask, &hdr);
2302         encode_restorefh(xdr, &hdr);
2303         encode_getfattr(xdr, args->bitmask, &hdr);
2304         encode_nops(&hdr);
2305 }
2306
2307 /*
2308  * Encode an OPEN_CONFIRM request
2309  */
2310 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2311                                       struct xdr_stream *xdr,
2312                                       struct nfs_open_confirmargs *args)
2313 {
2314         struct compound_hdr hdr = {
2315                 .nops   = 0,
2316         };
2317
2318         encode_compound_hdr(xdr, req, &hdr);
2319         encode_putfh(xdr, args->fh, &hdr);
2320         encode_open_confirm(xdr, args, &hdr);
2321         encode_nops(&hdr);
2322 }
2323
2324 /*
2325  * Encode an OPEN request with no attributes.
2326  */
2327 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2328                                      struct xdr_stream *xdr,
2329                                      struct nfs_openargs *args)
2330 {
2331         struct compound_hdr hdr = {
2332                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2333         };
2334
2335         encode_compound_hdr(xdr, req, &hdr);
2336         encode_sequence(xdr, &args->seq_args, &hdr);
2337         encode_putfh(xdr, args->fh, &hdr);
2338         encode_open(xdr, args, &hdr);
2339         encode_getfattr(xdr, args->bitmask, &hdr);
2340         encode_nops(&hdr);
2341 }
2342
2343 /*
2344  * Encode an OPEN_DOWNGRADE request
2345  */
2346 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2347                                         struct xdr_stream *xdr,
2348                                         struct nfs_closeargs *args)
2349 {
2350         struct compound_hdr hdr = {
2351                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2352         };
2353
2354         encode_compound_hdr(xdr, req, &hdr);
2355         encode_sequence(xdr, &args->seq_args, &hdr);
2356         encode_putfh(xdr, args->fh, &hdr);
2357         encode_open_downgrade(xdr, args, &hdr);
2358         encode_getfattr(xdr, args->bitmask, &hdr);
2359         encode_nops(&hdr);
2360 }
2361
2362 /*
2363  * Encode a LOCK request
2364  */
2365 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2366                               struct nfs_lock_args *args)
2367 {
2368         struct compound_hdr hdr = {
2369                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2370         };
2371
2372         encode_compound_hdr(xdr, req, &hdr);
2373         encode_sequence(xdr, &args->seq_args, &hdr);
2374         encode_putfh(xdr, args->fh, &hdr);
2375         encode_lock(xdr, args, &hdr);
2376         encode_nops(&hdr);
2377 }
2378
2379 /*
2380  * Encode a LOCKT request
2381  */
2382 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2383                                struct nfs_lockt_args *args)
2384 {
2385         struct compound_hdr hdr = {
2386                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2387         };
2388
2389         encode_compound_hdr(xdr, req, &hdr);
2390         encode_sequence(xdr, &args->seq_args, &hdr);
2391         encode_putfh(xdr, args->fh, &hdr);
2392         encode_lockt(xdr, args, &hdr);
2393         encode_nops(&hdr);
2394 }
2395
2396 /*
2397  * Encode a LOCKU request
2398  */
2399 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2400                                struct nfs_locku_args *args)
2401 {
2402         struct compound_hdr hdr = {
2403                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2404         };
2405
2406         encode_compound_hdr(xdr, req, &hdr);
2407         encode_sequence(xdr, &args->seq_args, &hdr);
2408         encode_putfh(xdr, args->fh, &hdr);
2409         encode_locku(xdr, args, &hdr);
2410         encode_nops(&hdr);
2411 }
2412
2413 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2414                                            struct xdr_stream *xdr,
2415                                         struct nfs_release_lockowner_args *args)
2416 {
2417         struct compound_hdr hdr = {
2418                 .minorversion = 0,
2419         };
2420
2421         encode_compound_hdr(xdr, req, &hdr);
2422         encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2423         encode_nops(&hdr);
2424 }
2425
2426 /*
2427  * Encode a READLINK request
2428  */
2429 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2430                                   const struct nfs4_readlink *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_readlink(xdr, args, req, &hdr);
2440
2441         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2442                         args->pgbase, args->pglen);
2443         encode_nops(&hdr);
2444 }
2445
2446 /*
2447  * Encode a READDIR request
2448  */
2449 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2450                                  const struct nfs4_readdir_arg *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_readdir(xdr, args, req, &hdr);
2460
2461         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2462                          args->pgbase, args->count);
2463         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2464                         __func__, hdr.replen << 2, args->pages,
2465                         args->pgbase, args->count);
2466         encode_nops(&hdr);
2467 }
2468
2469 /*
2470  * Encode a READ request
2471  */
2472 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2473                               struct nfs_readargs *args)
2474 {
2475         struct compound_hdr hdr = {
2476                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2477         };
2478
2479         encode_compound_hdr(xdr, req, &hdr);
2480         encode_sequence(xdr, &args->seq_args, &hdr);
2481         encode_putfh(xdr, args->fh, &hdr);
2482         encode_read(xdr, args, &hdr);
2483
2484         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2485                          args->pages, args->pgbase, args->count);
2486         req->rq_rcv_buf.flags |= XDRBUF_READ;
2487         encode_nops(&hdr);
2488 }
2489
2490 /*
2491  * Encode an SETATTR request
2492  */
2493 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2494                                  struct nfs_setattrargs *args)
2495 {
2496         struct compound_hdr hdr = {
2497                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2498         };
2499
2500         encode_compound_hdr(xdr, req, &hdr);
2501         encode_sequence(xdr, &args->seq_args, &hdr);
2502         encode_putfh(xdr, args->fh, &hdr);
2503         encode_setattr(xdr, args, args->server, &hdr);
2504         encode_getfattr(xdr, args->bitmask, &hdr);
2505         encode_nops(&hdr);
2506 }
2507
2508 /*
2509  * Encode a GETACL request
2510  */
2511 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2512                                 struct nfs_getaclargs *args)
2513 {
2514         struct compound_hdr hdr = {
2515                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2516         };
2517         uint32_t replen;
2518
2519         encode_compound_hdr(xdr, req, &hdr);
2520         encode_sequence(xdr, &args->seq_args, &hdr);
2521         encode_putfh(xdr, args->fh, &hdr);
2522         replen = hdr.replen + op_decode_hdr_maxsz + 1;
2523         encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2524
2525         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2526                 args->acl_pages, args->acl_pgbase, args->acl_len);
2527
2528         encode_nops(&hdr);
2529 }
2530
2531 /*
2532  * Encode a WRITE request
2533  */
2534 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2535                                struct nfs_writeargs *args)
2536 {
2537         struct compound_hdr hdr = {
2538                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2539         };
2540
2541         encode_compound_hdr(xdr, req, &hdr);
2542         encode_sequence(xdr, &args->seq_args, &hdr);
2543         encode_putfh(xdr, args->fh, &hdr);
2544         encode_write(xdr, args, &hdr);
2545         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2546         if (args->bitmask)
2547                 encode_getfattr(xdr, args->bitmask, &hdr);
2548         encode_nops(&hdr);
2549 }
2550
2551 /*
2552  *  a COMMIT request
2553  */
2554 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2555                                 struct nfs_writeargs *args)
2556 {
2557         struct compound_hdr hdr = {
2558                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2559         };
2560
2561         encode_compound_hdr(xdr, req, &hdr);
2562         encode_sequence(xdr, &args->seq_args, &hdr);
2563         encode_putfh(xdr, args->fh, &hdr);
2564         encode_commit(xdr, args, &hdr);
2565         if (args->bitmask)
2566                 encode_getfattr(xdr, args->bitmask, &hdr);
2567         encode_nops(&hdr);
2568 }
2569
2570 /*
2571  * FSINFO request
2572  */
2573 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2574                                 struct nfs4_fsinfo_arg *args)
2575 {
2576         struct compound_hdr hdr = {
2577                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2578         };
2579
2580         encode_compound_hdr(xdr, req, &hdr);
2581         encode_sequence(xdr, &args->seq_args, &hdr);
2582         encode_putfh(xdr, args->fh, &hdr);
2583         encode_fsinfo(xdr, args->bitmask, &hdr);
2584         encode_nops(&hdr);
2585 }
2586
2587 /*
2588  * a PATHCONF request
2589  */
2590 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2591                                   const struct nfs4_pathconf_arg *args)
2592 {
2593         struct compound_hdr hdr = {
2594                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2595         };
2596
2597         encode_compound_hdr(xdr, req, &hdr);
2598         encode_sequence(xdr, &args->seq_args, &hdr);
2599         encode_putfh(xdr, args->fh, &hdr);
2600         encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2601                            &hdr);
2602         encode_nops(&hdr);
2603 }
2604
2605 /*
2606  * a STATFS request
2607  */
2608 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2609                                 const struct nfs4_statfs_arg *args)
2610 {
2611         struct compound_hdr hdr = {
2612                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2613         };
2614
2615         encode_compound_hdr(xdr, req, &hdr);
2616         encode_sequence(xdr, &args->seq_args, &hdr);
2617         encode_putfh(xdr, args->fh, &hdr);
2618         encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2619                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2620         encode_nops(&hdr);
2621 }
2622
2623 /*
2624  * GETATTR_BITMAP request
2625  */
2626 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2627                                      struct xdr_stream *xdr,
2628                                      struct nfs4_server_caps_arg *args)
2629 {
2630         struct compound_hdr hdr = {
2631                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2632         };
2633
2634         encode_compound_hdr(xdr, req, &hdr);
2635         encode_sequence(xdr, &args->seq_args, &hdr);
2636         encode_putfh(xdr, args->fhandle, &hdr);
2637         encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2638                            FATTR4_WORD0_LINK_SUPPORT|
2639                            FATTR4_WORD0_SYMLINK_SUPPORT|
2640                            FATTR4_WORD0_ACLSUPPORT, &hdr);
2641         encode_nops(&hdr);
2642 }
2643
2644 /*
2645  * a RENEW request
2646  */
2647 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2648                                struct nfs_client *clp)
2649 {
2650         struct compound_hdr hdr = {
2651                 .nops   = 0,
2652         };
2653
2654         encode_compound_hdr(xdr, req, &hdr);
2655         encode_renew(xdr, clp, &hdr);
2656         encode_nops(&hdr);
2657 }
2658
2659 /*
2660  * a SETCLIENTID request
2661  */
2662 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2663                                      struct xdr_stream *xdr,
2664                                      struct nfs4_setclientid *sc)
2665 {
2666         struct compound_hdr hdr = {
2667                 .nops   = 0,
2668         };
2669
2670         encode_compound_hdr(xdr, req, &hdr);
2671         encode_setclientid(xdr, sc, &hdr);
2672         encode_nops(&hdr);
2673 }
2674
2675 /*
2676  * a SETCLIENTID_CONFIRM request
2677  */
2678 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2679                                              struct xdr_stream *xdr,
2680                                              struct nfs4_setclientid_res *arg)
2681 {
2682         struct compound_hdr hdr = {
2683                 .nops   = 0,
2684         };
2685         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2686
2687         encode_compound_hdr(xdr, req, &hdr);
2688         encode_setclientid_confirm(xdr, arg, &hdr);
2689         encode_putrootfh(xdr, &hdr);
2690         encode_fsinfo(xdr, lease_bitmap, &hdr);
2691         encode_nops(&hdr);
2692 }
2693
2694 /*
2695  * DELEGRETURN request
2696  */
2697 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2698                                      struct xdr_stream *xdr,
2699                                      const struct nfs4_delegreturnargs *args)
2700 {
2701         struct compound_hdr hdr = {
2702                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2703         };
2704
2705         encode_compound_hdr(xdr, req, &hdr);
2706         encode_sequence(xdr, &args->seq_args, &hdr);
2707         encode_putfh(xdr, args->fhandle, &hdr);
2708         encode_delegreturn(xdr, args->stateid, &hdr);
2709         encode_getfattr(xdr, args->bitmask, &hdr);
2710         encode_nops(&hdr);
2711 }
2712
2713 /*
2714  * Encode FS_LOCATIONS request
2715  */
2716 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2717                                       struct xdr_stream *xdr,
2718                                       struct nfs4_fs_locations_arg *args)
2719 {
2720         struct compound_hdr hdr = {
2721                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2722         };
2723         uint32_t replen;
2724
2725         encode_compound_hdr(xdr, req, &hdr);
2726         encode_sequence(xdr, &args->seq_args, &hdr);
2727         encode_putfh(xdr, args->dir_fh, &hdr);
2728         encode_lookup(xdr, args->name, &hdr);
2729         replen = hdr.replen;    /* get the attribute into args->page */
2730         encode_fs_locations(xdr, args->bitmask, &hdr);
2731
2732         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2733                         0, PAGE_SIZE);
2734         encode_nops(&hdr);
2735 }
2736
2737 /*
2738  * Encode SECINFO request
2739  */
2740 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2741                                 struct xdr_stream *xdr,
2742                                 struct nfs4_secinfo_arg *args)
2743 {
2744         struct compound_hdr hdr = {
2745                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2746         };
2747
2748         encode_compound_hdr(xdr, req, &hdr);
2749         encode_sequence(xdr, &args->seq_args, &hdr);
2750         encode_putfh(xdr, args->dir_fh, &hdr);
2751         encode_secinfo(xdr, args->name, &hdr);
2752         encode_nops(&hdr);
2753 }
2754
2755 #if defined(CONFIG_NFS_V4_1)
2756 /*
2757  * EXCHANGE_ID request
2758  */
2759 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2760                                      struct xdr_stream *xdr,
2761                                      struct nfs41_exchange_id_args *args)
2762 {
2763         struct compound_hdr hdr = {
2764                 .minorversion = args->client->cl_mvops->minor_version,
2765         };
2766
2767         encode_compound_hdr(xdr, req, &hdr);
2768         encode_exchange_id(xdr, args, &hdr);
2769         encode_nops(&hdr);
2770 }
2771
2772 /*
2773  * a CREATE_SESSION request
2774  */
2775 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2776                                         struct xdr_stream *xdr,
2777                                         struct nfs41_create_session_args *args)
2778 {
2779         struct compound_hdr hdr = {
2780                 .minorversion = args->client->cl_mvops->minor_version,
2781         };
2782
2783         encode_compound_hdr(xdr, req, &hdr);
2784         encode_create_session(xdr, args, &hdr);
2785         encode_nops(&hdr);
2786 }
2787
2788 /*
2789  * a DESTROY_SESSION request
2790  */
2791 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2792                                          struct xdr_stream *xdr,
2793                                          struct nfs4_session *session)
2794 {
2795         struct compound_hdr hdr = {
2796                 .minorversion = session->clp->cl_mvops->minor_version,
2797         };
2798
2799         encode_compound_hdr(xdr, req, &hdr);
2800         encode_destroy_session(xdr, session, &hdr);
2801         encode_nops(&hdr);
2802 }
2803
2804 /*
2805  * a SEQUENCE request
2806  */
2807 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2808                                   struct nfs4_sequence_args *args)
2809 {
2810         struct compound_hdr hdr = {
2811                 .minorversion = nfs4_xdr_minorversion(args),
2812         };
2813
2814         encode_compound_hdr(xdr, req, &hdr);
2815         encode_sequence(xdr, args, &hdr);
2816         encode_nops(&hdr);
2817 }
2818
2819 /*
2820  * a GET_LEASE_TIME request
2821  */
2822 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2823                                         struct xdr_stream *xdr,
2824                                         struct nfs4_get_lease_time_args *args)
2825 {
2826         struct compound_hdr hdr = {
2827                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2828         };
2829         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2830
2831         encode_compound_hdr(xdr, req, &hdr);
2832         encode_sequence(xdr, &args->la_seq_args, &hdr);
2833         encode_putrootfh(xdr, &hdr);
2834         encode_fsinfo(xdr, lease_bitmap, &hdr);
2835         encode_nops(&hdr);
2836 }
2837
2838 /*
2839  * a RECLAIM_COMPLETE request
2840  */
2841 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2842                                           struct xdr_stream *xdr,
2843                                 struct nfs41_reclaim_complete_args *args)
2844 {
2845         struct compound_hdr hdr = {
2846                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2847         };
2848
2849         encode_compound_hdr(xdr, req, &hdr);
2850         encode_sequence(xdr, &args->seq_args, &hdr);
2851         encode_reclaim_complete(xdr, args, &hdr);
2852         encode_nops(&hdr);
2853 }
2854
2855 /*
2856  * Encode GETDEVICELIST request
2857  */
2858 static void nfs4_xdr_enc_getdevicelist(struct rpc_rqst *req,
2859                                        struct xdr_stream *xdr,
2860                                        struct nfs4_getdevicelist_args *args)
2861 {
2862         struct compound_hdr hdr = {
2863                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2864         };
2865
2866         encode_compound_hdr(xdr, req, &hdr);
2867         encode_sequence(xdr, &args->seq_args, &hdr);
2868         encode_putfh(xdr, args->fh, &hdr);
2869         encode_getdevicelist(xdr, args, &hdr);
2870         encode_nops(&hdr);
2871 }
2872
2873 /*
2874  * Encode GETDEVICEINFO request
2875  */
2876 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2877                                        struct xdr_stream *xdr,
2878                                        struct nfs4_getdeviceinfo_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_getdeviceinfo(xdr, args, &hdr);
2887
2888         /* set up reply kvec. Subtract notification bitmap max size (2)
2889          * so that notification bitmap is put in xdr_buf tail */
2890         xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2891                          args->pdev->pages, args->pdev->pgbase,
2892                          args->pdev->pglen);
2893
2894         encode_nops(&hdr);
2895 }
2896
2897 /*
2898  *  Encode LAYOUTGET request
2899  */
2900 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2901                                    struct xdr_stream *xdr,
2902                                    struct nfs4_layoutget_args *args)
2903 {
2904         struct compound_hdr hdr = {
2905                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2906         };
2907
2908         encode_compound_hdr(xdr, req, &hdr);
2909         encode_sequence(xdr, &args->seq_args, &hdr);
2910         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2911         encode_layoutget(xdr, args, &hdr);
2912
2913         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2914             args->layout.pages, 0, args->layout.pglen);
2915
2916         encode_nops(&hdr);
2917 }
2918
2919 /*
2920  *  Encode LAYOUTCOMMIT request
2921  */
2922 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2923                                       struct xdr_stream *xdr,
2924                                       struct nfs4_layoutcommit_args *args)
2925 {
2926         struct nfs4_layoutcommit_data *data =
2927                 container_of(args, struct nfs4_layoutcommit_data, args);
2928         struct compound_hdr hdr = {
2929                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2930         };
2931
2932         encode_compound_hdr(xdr, req, &hdr);
2933         encode_sequence(xdr, &args->seq_args, &hdr);
2934         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2935         encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2936         encode_getfattr(xdr, args->bitmask, &hdr);
2937         encode_nops(&hdr);
2938 }
2939
2940 /*
2941  * Encode LAYOUTRETURN request
2942  */
2943 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2944                                       struct xdr_stream *xdr,
2945                                       struct nfs4_layoutreturn_args *args)
2946 {
2947         struct compound_hdr hdr = {
2948                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2949         };
2950
2951         encode_compound_hdr(xdr, req, &hdr);
2952         encode_sequence(xdr, &args->seq_args, &hdr);
2953         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2954         encode_layoutreturn(xdr, args, &hdr);
2955         encode_nops(&hdr);
2956 }
2957
2958 /*
2959  * Encode SECINFO_NO_NAME request
2960  */
2961 static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
2962                                         struct xdr_stream *xdr,
2963                                         struct nfs41_secinfo_no_name_args *args)
2964 {
2965         struct compound_hdr hdr = {
2966                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2967         };
2968
2969         encode_compound_hdr(xdr, req, &hdr);
2970         encode_sequence(xdr, &args->seq_args, &hdr);
2971         encode_putrootfh(xdr, &hdr);
2972         encode_secinfo_no_name(xdr, args, &hdr);
2973         encode_nops(&hdr);
2974         return 0;
2975 }
2976
2977 /*
2978  *  Encode TEST_STATEID request
2979  */
2980 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
2981                                       struct xdr_stream *xdr,
2982                                       struct nfs41_test_stateid_args *args)
2983 {
2984         struct compound_hdr hdr = {
2985                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2986         };
2987
2988         encode_compound_hdr(xdr, req, &hdr);
2989         encode_sequence(xdr, &args->seq_args, &hdr);
2990         encode_test_stateid(xdr, args, &hdr);
2991         encode_nops(&hdr);
2992 }
2993
2994 /*
2995  *  Encode FREE_STATEID request
2996  */
2997 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
2998                                      struct xdr_stream *xdr,
2999                                      struct nfs41_free_stateid_args *args)
3000 {
3001         struct compound_hdr hdr = {
3002                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3003         };
3004
3005         encode_compound_hdr(xdr, req, &hdr);
3006         encode_sequence(xdr, &args->seq_args, &hdr);
3007         encode_free_stateid(xdr, args, &hdr);
3008         encode_nops(&hdr);
3009 }
3010 #endif /* CONFIG_NFS_V4_1 */
3011
3012 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
3013 {
3014         dprintk("nfs: %s: prematurely hit end of receive buffer. "
3015                 "Remaining buffer length is %tu words.\n",
3016                 func, xdr->end - xdr->p);
3017 }
3018
3019 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3020 {
3021         __be32 *p;
3022
3023         p = xdr_inline_decode(xdr, 4);
3024         if (unlikely(!p))
3025                 goto out_overflow;
3026         *len = be32_to_cpup(p);
3027         p = xdr_inline_decode(xdr, *len);
3028         if (unlikely(!p))
3029                 goto out_overflow;
3030         *string = (char *)p;
3031         return 0;
3032 out_overflow:
3033         print_overflow_msg(__func__, xdr);
3034         return -EIO;
3035 }
3036
3037 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3038 {
3039         __be32 *p;
3040
3041         p = xdr_inline_decode(xdr, 8);
3042         if (unlikely(!p))
3043                 goto out_overflow;
3044         hdr->status = be32_to_cpup(p++);
3045         hdr->taglen = be32_to_cpup(p);
3046
3047         p = xdr_inline_decode(xdr, hdr->taglen + 4);
3048         if (unlikely(!p))
3049                 goto out_overflow;
3050         hdr->tag = (char *)p;
3051         p += XDR_QUADLEN(hdr->taglen);
3052         hdr->nops = be32_to_cpup(p);
3053         if (unlikely(hdr->nops < 1))
3054                 return nfs4_stat_to_errno(hdr->status);
3055         return 0;
3056 out_overflow:
3057         print_overflow_msg(__func__, xdr);
3058         return -EIO;
3059 }
3060
3061 static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3062                 int *nfs_retval)
3063 {
3064         __be32 *p;
3065         uint32_t opnum;
3066         int32_t nfserr;
3067
3068         p = xdr_inline_decode(xdr, 8);
3069         if (unlikely(!p))
3070                 goto out_overflow;
3071         opnum = be32_to_cpup(p++);
3072         if (unlikely(opnum != expected))
3073                 goto out_bad_operation;
3074         nfserr = be32_to_cpup(p);
3075         if (nfserr == NFS_OK)
3076                 *nfs_retval = 0;
3077         else
3078                 *nfs_retval = nfs4_stat_to_errno(nfserr);
3079         return true;
3080 out_bad_operation:
3081         dprintk("nfs: Server returned operation"
3082                 " %d but we issued a request for %d\n",
3083                         opnum, expected);
3084         *nfs_retval = -EREMOTEIO;
3085         return false;
3086 out_overflow:
3087         print_overflow_msg(__func__, xdr);
3088         *nfs_retval = -EIO;
3089         return false;
3090 }
3091
3092 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3093 {
3094         int retval;
3095
3096         __decode_op_hdr(xdr, expected, &retval);
3097         return retval;
3098 }
3099
3100 /* Dummy routine */
3101 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
3102 {
3103         __be32 *p;
3104         unsigned int strlen;
3105         char *str;
3106
3107         p = xdr_inline_decode(xdr, 12);
3108         if (likely(p))
3109                 return decode_opaque_inline(xdr, &strlen, &str);
3110         print_overflow_msg(__func__, xdr);
3111         return -EIO;
3112 }
3113
3114 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3115 {