Pileus Git - ~andy/linux/blob - fs/nfs/nfs4xdr.c

   1 /*
   2  *  fs/nfs/nfs4xdr.c
   3  *
   4  *  Client-side XDR for NFSv4.
   5  *
   6  *  Copyright (c) 2002 The Regents of the University of Michigan.
   7  *  All rights reserved.
   8  *
   9  *  Kendrick Smith <kmsmith@umich.edu>
  10  *  Andy Adamson   <andros@umich.edu>
  11  *
  12  *  Redistribution and use in source and binary forms, with or without
  13  *  modification, are permitted provided that the following conditions
  14  *  are met:
  15  *
  16  *  1. Redistributions of source code must retain the above copyright
  17  *     notice, this list of conditions and the following disclaimer.
  18  *  2. Redistributions in binary form must reproduce the above copyright
  19  *     notice, this list of conditions and the following disclaimer in the
  20  *     documentation and/or other materials provided with the distribution.
  21  *  3. Neither the name of the University nor the names of its
  22  *     contributors may be used to endorse or promote products derived
  23  *     from this software without specific prior written permission.
  24  *
  25  *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  26  *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  27  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  28  *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  29  *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30  *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31  *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  32  *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  33  *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  34  *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  35  *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 #include <linux/param.h>
  39 #include <linux/time.h>
  40 #include <linux/mm.h>
  41 #include <linux/errno.h>
  42 #include <linux/string.h>
  43 #include <linux/in.h>
  44 #include <linux/pagemap.h>
  45 #include <linux/proc_fs.h>
  46 #include <linux/kdev_t.h>
  47 #include <linux/sunrpc/clnt.h>
  48 #include <linux/sunrpc/msg_prot.h>
  49 #include <linux/sunrpc/gss_api.h>
  50 #include <linux/nfs.h>
  51 #include <linux/nfs4.h>
  52 #include <linux/nfs_fs.h>
  53 #include <linux/nfs_idmap.h>
  54 #include "nfs4_fs.h"
  55 #include "internal.h"
  56 #include "pnfs.h"
  57
  58 #define NFSDBG_FACILITY         NFSDBG_XDR
  59
  60 /* Mapping from NFS error code to "errno" error code. */
  61 #define errno_NFSERR_IO         EIO
  62
  63 static int nfs4_stat_to_errno(int);
  64
  65 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
  66 #ifdef DEBUG
  67 #define NFS4_MAXTAGLEN          20
  68 #else
  69 #define NFS4_MAXTAGLEN          0
  70 #endif
  71
  72 /* lock,open owner id:
  73  * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT  >> 2)
  74  */
  75 #define open_owner_id_maxsz     (1 + 1 + 4)
  76 #define lock_owner_id_maxsz     (1 + 1 + 4)
  77 #define decode_lockowner_maxsz  (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  78 #define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  79 #define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  80 #define op_encode_hdr_maxsz     (1)
  81 #define op_decode_hdr_maxsz     (2)
  82 #define encode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  83 #define decode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  84 #define encode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  85 #define decode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  86 #define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
  87                                 (NFS4_FHSIZE >> 2))
  88 #define decode_putfh_maxsz      (op_decode_hdr_maxsz)
  89 #define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
  90 #define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
  91 #define encode_getfh_maxsz      (op_encode_hdr_maxsz)
  92 #define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
  93                                 ((3+NFS4_FHSIZE) >> 2))
  94 #define nfs4_fattr_bitmap_maxsz 4
  95 #define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
  96 #define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
  97 #define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
  98 #define nfs4_owner_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  99 #define nfs4_group_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 100 /* This is based on getfattr, which uses the most attributes: */
 101 #define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
 102                                 3 + 3 + 3 + nfs4_owner_maxsz + nfs4_group_maxsz))
 103 #define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
 104                                 nfs4_fattr_value_maxsz)
 105 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
 106 #define encode_attrs_maxsz      (nfs4_fattr_bitmap_maxsz + \
 107                                  1 + 2 + 1 + \
 108                                 nfs4_owner_maxsz + \
 109                                 nfs4_group_maxsz + \
 110                                 4 + 4)
 111 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
 112 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
 113 #define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
 114 #define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 115 #define encode_fsinfo_maxsz     (encode_getattr_maxsz)
 116 /* The 5 accounts for the PNFS attributes, and assumes that at most three
 117  * layout types will be returned.
 118  */
 119 #define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + \
 120                                  nfs4_fattr_bitmap_maxsz + 4 + 8 + 5)
 121 #define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 122 #define decode_renew_maxsz      (op_decode_hdr_maxsz)
 123 #define encode_setclientid_maxsz \
 124                                 (op_encode_hdr_maxsz + \
 125                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 126                                 XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
 127                                 1 /* sc_prog */ + \
 128                                 XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 129                                 XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
 130                                 1) /* sc_cb_ident */
 131 #define decode_setclientid_maxsz \
 132                                 (op_decode_hdr_maxsz + \
 133                                 2 + \
 134                                 1024) /* large value for CLID_INUSE */
 135 #define encode_setclientid_confirm_maxsz \
 136                                 (op_encode_hdr_maxsz + \
 137                                 3 + (NFS4_VERIFIER_SIZE >> 2))
 138 #define decode_setclientid_confirm_maxsz \
 139                                 (op_decode_hdr_maxsz)
 140 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
 141 #define decode_lookup_maxsz     (op_decode_hdr_maxsz)
 142 #define encode_share_access_maxsz \
 143                                 (2)
 144 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
 145 #define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
 146 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
 147 #define encode_open_maxsz       (op_encode_hdr_maxsz + \
 148                                 2 + encode_share_access_maxsz + 2 + \
 149                                 open_owner_id_maxsz + \
 150                                 encode_opentype_maxsz + \
 151                                 encode_claim_null_maxsz)
 152 #define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
 153 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
 154                                 decode_ace_maxsz)
 155 #define decode_change_info_maxsz        (5)
 156 #define decode_open_maxsz       (op_decode_hdr_maxsz + \
 157                                 decode_stateid_maxsz + \
 158                                 decode_change_info_maxsz + 1 + \
 159                                 nfs4_fattr_bitmap_maxsz + \
 160                                 decode_delegation_maxsz)
 161 #define encode_open_confirm_maxsz \
 162                                 (op_encode_hdr_maxsz + \
 163                                  encode_stateid_maxsz + 1)
 164 #define decode_open_confirm_maxsz \
 165                                 (op_decode_hdr_maxsz + \
 166                                  decode_stateid_maxsz)
 167 #define encode_open_downgrade_maxsz \
 168                                 (op_encode_hdr_maxsz + \
 169                                  encode_stateid_maxsz + 1 + \
 170                                  encode_share_access_maxsz)
 171 #define decode_open_downgrade_maxsz \
 172                                 (op_decode_hdr_maxsz + \
 173                                  decode_stateid_maxsz)
 174 #define encode_close_maxsz      (op_encode_hdr_maxsz + \
 175                                  1 + encode_stateid_maxsz)
 176 #define decode_close_maxsz      (op_decode_hdr_maxsz + \
 177                                  decode_stateid_maxsz)
 178 #define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
 179                                  encode_stateid_maxsz + \
 180                                  encode_attrs_maxsz)
 181 #define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
 182                                  nfs4_fattr_bitmap_maxsz)
 183 #define encode_read_maxsz       (op_encode_hdr_maxsz + \
 184                                  encode_stateid_maxsz + 3)
 185 #define decode_read_maxsz       (op_decode_hdr_maxsz + 2)
 186 #define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
 187                                  2 + encode_verifier_maxsz + 5)
 188 #define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
 189                                  decode_verifier_maxsz)
 190 #define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 191 #define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1)
 192 #define encode_write_maxsz      (op_encode_hdr_maxsz + \
 193                                  encode_stateid_maxsz + 4)
 194 #define decode_write_maxsz      (op_decode_hdr_maxsz + \
 195                                  2 + decode_verifier_maxsz)
 196 #define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
 197 #define decode_commit_maxsz     (op_decode_hdr_maxsz + \
 198                                  decode_verifier_maxsz)
 199 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 200                                 nfs4_name_maxsz)
 201 #define decode_remove_maxsz     (op_decode_hdr_maxsz + \
 202                                  decode_change_info_maxsz)
 203 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 204                                 2 * nfs4_name_maxsz)
 205 #define decode_rename_maxsz     (op_decode_hdr_maxsz + \
 206                                  decode_change_info_maxsz + \
 207                                  decode_change_info_maxsz)
 208 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 209                                 nfs4_name_maxsz)
 210 #define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
 211 #define encode_lockowner_maxsz  (7)
 212 #define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 213                                  7 + \
 214                                  1 + encode_stateid_maxsz + 1 + \
 215                                  encode_lockowner_maxsz)
 216 #define decode_lock_denied_maxsz \
 217                                 (8 + decode_lockowner_maxsz)
 218 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 219                                  decode_lock_denied_maxsz)
 220 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 5 + \
 221                                 encode_lockowner_maxsz)
 222 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 223                                  decode_lock_denied_maxsz)
 224 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 225                                  encode_stateid_maxsz + \
 226                                  4)
 227 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 228                                  decode_stateid_maxsz)
 229 #define encode_release_lockowner_maxsz \
 230                                 (op_encode_hdr_maxsz + \
 231                                  encode_lockowner_maxsz)
 232 #define decode_release_lockowner_maxsz \
 233                                 (op_decode_hdr_maxsz)
 234 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 235 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 236 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 237                                 1 + nfs4_name_maxsz + \
 238                                 1 + \
 239                                 nfs4_fattr_maxsz)
 240 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 241 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 242                                 1 + 2 + nfs4_name_maxsz + \
 243                                 encode_attrs_maxsz)
 244 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
 245                                 decode_change_info_maxsz + \
 246                                 nfs4_fattr_bitmap_maxsz)
 247 #define encode_statfs_maxsz     (encode_getattr_maxsz)
 248 #define decode_statfs_maxsz     (decode_getattr_maxsz)
 249 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 250 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 251 #define encode_getacl_maxsz     (encode_getattr_maxsz)
 252 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 253                                  nfs4_fattr_bitmap_maxsz + 1)
 254 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 255                                  encode_stateid_maxsz + 3)
 256 #define decode_setacl_maxsz     (decode_setattr_maxsz)
 257 #define encode_fs_locations_maxsz \
 258                                 (encode_getattr_maxsz)
 259 #define decode_fs_locations_maxsz \
 260                                 (0)
 261 #define encode_secinfo_maxsz    (op_encode_hdr_maxsz + nfs4_name_maxsz)
 262 #define decode_secinfo_maxsz    (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
 263
 264 #if defined(CONFIG_NFS_V4_1)
 265 #define NFS4_MAX_MACHINE_NAME_LEN (64)
 266
 267 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
 268                                 encode_verifier_maxsz + \
 269                                 1 /* co_ownerid.len */ + \
 270                                 XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
 271                                 1 /* flags */ + \
 272                                 1 /* spa_how */ + \
 273                                 0 /* SP4_NONE (for now) */ + \
 274                                 1 /* zero implemetation id array */)
 275 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
 276                                 2 /* eir_clientid */ + \
 277                                 1 /* eir_sequenceid */ + \
 278                                 1 /* eir_flags */ + \
 279                                 1 /* spr_how */ + \
 280                                 0 /* SP4_NONE (for now) */ + \
 281                                 2 /* eir_server_owner.so_minor_id */ + \
 282                                 /* eir_server_owner.so_major_id<> */ \
 283                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 284                                 /* eir_server_scope<> */ \
 285                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 286                                 1 /* eir_server_impl_id array length */ + \
 287                                 0 /* ignored eir_server_impl_id contents */)
 288 #define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
 289 #define decode_channel_attrs_maxsz  (6 + \
 290                                      1 /* ca_rdma_ird.len */ + \
 291                                      1 /* ca_rdma_ird */)
 292 #define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
 293                                      2 /* csa_clientid */ + \
 294                                      1 /* csa_sequence */ + \
 295                                      1 /* csa_flags */ + \
 296                                      encode_channel_attrs_maxsz + \
 297                                      encode_channel_attrs_maxsz + \
 298                                      1 /* csa_cb_program */ + \
 299                                      1 /* csa_sec_parms.len (1) */ + \
 300                                      1 /* cb_secflavor (AUTH_SYS) */ + \
 301                                      1 /* stamp */ + \
 302                                      1 /* machinename.len */ + \
 303                                      XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
 304                                      1 /* uid */ + \
 305                                      1 /* gid */ + \
 306                                      1 /* gids.len (0) */)
 307 #define decode_create_session_maxsz  (op_decode_hdr_maxsz +     \
 308                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 309                                      1 /* csr_sequence */ + \
 310                                      1 /* csr_flags */ + \
 311                                      decode_channel_attrs_maxsz + \
 312                                      decode_channel_attrs_maxsz)
 313 #define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
 314 #define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
 315 #define encode_sequence_maxsz   (op_encode_hdr_maxsz + \
 316                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
 317 #define decode_sequence_maxsz   (op_decode_hdr_maxsz + \
 318                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
 319 #define encode_reclaim_complete_maxsz   (op_encode_hdr_maxsz + 4)
 320 #define decode_reclaim_complete_maxsz   (op_decode_hdr_maxsz + 4)
 321 #define encode_getdevicelist_maxsz (op_encode_hdr_maxsz + 4 + \
 322                                 encode_verifier_maxsz)
 323 #define decode_getdevicelist_maxsz (op_decode_hdr_maxsz + \
 324                                 2 /* nfs_cookie4 gdlr_cookie */ + \
 325                                 decode_verifier_maxsz \
 326                                   /* verifier4 gdlr_verifier */ + \
 327                                 1 /* gdlr_deviceid_list count */ + \
 328                                 XDR_QUADLEN(NFS4_PNFS_GETDEVLIST_MAXNUM * \
 329                                             NFS4_DEVICEID4_SIZE) \
 330                                   /* gdlr_deviceid_list */ + \
 331                                 1 /* bool gdlr_eof */)
 332 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + 4 + \
 333                                 XDR_QUADLEN(NFS4_DEVICEID4_SIZE))
 334 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
 335                                 1 /* layout type */ + \
 336                                 1 /* opaque devaddr4 length */ + \
 337                                   /* devaddr4 payload is read into page */ \
 338                                 1 /* notification bitmap length */ + \
 339                                 1 /* notification bitmap */)
 340 #define encode_layoutget_maxsz  (op_encode_hdr_maxsz + 10 + \
 341                                 encode_stateid_maxsz)
 342 #define decode_layoutget_maxsz  (op_decode_hdr_maxsz + 8 + \
 343                                 decode_stateid_maxsz + \
 344                                 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
 345 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz +          \
 346                                 2 /* offset */ + \
 347                                 2 /* length */ + \
 348                                 1 /* reclaim */ + \
 349                                 encode_stateid_maxsz + \
 350                                 1 /* new offset (true) */ + \
 351                                 2 /* last byte written */ + \
 352                                 1 /* nt_timechanged (false) */ + \
 353                                 1 /* layoutupdate4 layout type */ + \
 354                                 1 /* NULL filelayout layoutupdate4 payload */)
 355 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
 356 #define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
 357                                 encode_stateid_maxsz + \
 358                                 1 /* FIXME: opaque lrf_body always empty at the moment */)
 359 #define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
 360                                 1 + decode_stateid_maxsz)
 361 #define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
 362 #define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
 363 #define encode_test_stateid_maxsz       (op_encode_hdr_maxsz + 2 + \
 364                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 365 #define decode_test_stateid_maxsz       (op_decode_hdr_maxsz + 2 + 1)
 366 #define encode_free_stateid_maxsz       (op_encode_hdr_maxsz + 1 + \
 367                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 368 #define decode_free_stateid_maxsz       (op_decode_hdr_maxsz + 1)
 369 #else /* CONFIG_NFS_V4_1 */
 370 #define encode_sequence_maxsz   0
 371 #define decode_sequence_maxsz   0
 372 #endif /* CONFIG_NFS_V4_1 */
 373
 374 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 375 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 376 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 377                                 encode_sequence_maxsz + \
 378                                 encode_putfh_maxsz + \
 379                                 encode_read_maxsz)
 380 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 381                                 decode_sequence_maxsz + \
 382                                 decode_putfh_maxsz + \
 383                                 decode_read_maxsz)
 384 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 385                                 encode_sequence_maxsz + \
 386                                 encode_putfh_maxsz + \
 387                                 encode_readlink_maxsz)
 388 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 389                                 decode_sequence_maxsz + \
 390                                 decode_putfh_maxsz + \
 391                                 decode_readlink_maxsz)
 392 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 393                                 encode_sequence_maxsz + \
 394                                 encode_putfh_maxsz + \
 395                                 encode_readdir_maxsz)
 396 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 397                                 decode_sequence_maxsz + \
 398                                 decode_putfh_maxsz + \
 399                                 decode_readdir_maxsz)
 400 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 401                                 encode_sequence_maxsz + \
 402                                 encode_putfh_maxsz + \
 403                                 encode_write_maxsz + \
 404                                 encode_getattr_maxsz)
 405 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 406                                 decode_sequence_maxsz + \
 407                                 decode_putfh_maxsz + \
 408                                 decode_write_maxsz + \
 409                                 decode_getattr_maxsz)
 410 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 411                                 encode_sequence_maxsz + \
 412                                 encode_putfh_maxsz + \
 413                                 encode_commit_maxsz + \
 414                                 encode_getattr_maxsz)
 415 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 416                                 decode_sequence_maxsz + \
 417                                 decode_putfh_maxsz + \
 418                                 decode_commit_maxsz + \
 419                                 decode_getattr_maxsz)
 420 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 421                                 encode_sequence_maxsz + \
 422                                 encode_putfh_maxsz + \
 423                                 encode_savefh_maxsz + \
 424                                 encode_open_maxsz + \
 425                                 encode_getfh_maxsz + \
 426                                 encode_getattr_maxsz + \
 427                                 encode_restorefh_maxsz + \
 428                                 encode_getattr_maxsz)
 429 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 430                                 decode_sequence_maxsz + \
 431                                 decode_putfh_maxsz + \
 432                                 decode_savefh_maxsz + \
 433                                 decode_open_maxsz + \
 434                                 decode_getfh_maxsz + \
 435                                 decode_getattr_maxsz + \
 436                                 decode_restorefh_maxsz + \
 437                                 decode_getattr_maxsz)
 438 #define NFS4_enc_open_confirm_sz \
 439                                 (compound_encode_hdr_maxsz + \
 440                                  encode_putfh_maxsz + \
 441                                  encode_open_confirm_maxsz)
 442 #define NFS4_dec_open_confirm_sz \
 443                                 (compound_decode_hdr_maxsz + \
 444                                  decode_putfh_maxsz + \
 445                                  decode_open_confirm_maxsz)
 446 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 447                                         encode_sequence_maxsz + \
 448                                         encode_putfh_maxsz + \
 449                                         encode_open_maxsz + \
 450                                         encode_getattr_maxsz)
 451 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 452                                         decode_sequence_maxsz + \
 453                                         decode_putfh_maxsz + \
 454                                         decode_open_maxsz + \
 455                                         decode_getattr_maxsz)
 456 #define NFS4_enc_open_downgrade_sz \
 457                                 (compound_encode_hdr_maxsz + \
 458                                  encode_sequence_maxsz + \
 459                                  encode_putfh_maxsz + \
 460                                  encode_open_downgrade_maxsz + \
 461                                  encode_getattr_maxsz)
 462 #define NFS4_dec_open_downgrade_sz \
 463                                 (compound_decode_hdr_maxsz + \
 464                                  decode_sequence_maxsz + \
 465                                  decode_putfh_maxsz + \
 466                                  decode_open_downgrade_maxsz + \
 467                                  decode_getattr_maxsz)
 468 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 469                                  encode_sequence_maxsz + \
 470                                  encode_putfh_maxsz + \
 471                                  encode_close_maxsz + \
 472                                  encode_getattr_maxsz)
 473 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 474                                  decode_sequence_maxsz + \
 475                                  decode_putfh_maxsz + \
 476                                  decode_close_maxsz + \
 477                                  decode_getattr_maxsz)
 478 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 479                                  encode_sequence_maxsz + \
 480                                  encode_putfh_maxsz + \
 481                                  encode_setattr_maxsz + \
 482                                  encode_getattr_maxsz)
 483 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 484                                  decode_sequence_maxsz + \
 485                                  decode_putfh_maxsz + \
 486                                  decode_setattr_maxsz + \
 487                                  decode_getattr_maxsz)
 488 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 489                                 encode_sequence_maxsz + \
 490                                 encode_putfh_maxsz + \
 491                                 encode_fsinfo_maxsz)
 492 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 493                                 decode_sequence_maxsz + \
 494                                 decode_putfh_maxsz + \
 495                                 decode_fsinfo_maxsz)
 496 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 497                                 encode_renew_maxsz)
 498 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 499                                 decode_renew_maxsz)
 500 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 501                                 encode_setclientid_maxsz)
 502 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 503                                 decode_setclientid_maxsz)
 504 #define NFS4_enc_setclientid_confirm_sz \
 505                                 (compound_encode_hdr_maxsz + \
 506                                 encode_setclientid_confirm_maxsz + \
 507                                 encode_putrootfh_maxsz + \
 508                                 encode_fsinfo_maxsz)
 509 #define NFS4_dec_setclientid_confirm_sz \
 510                                 (compound_decode_hdr_maxsz + \
 511                                 decode_setclientid_confirm_maxsz + \
 512                                 decode_putrootfh_maxsz + \
 513                                 decode_fsinfo_maxsz)
 514 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 515                                 encode_sequence_maxsz + \
 516                                 encode_putfh_maxsz + \
 517                                 encode_lock_maxsz)
 518 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 519                                 decode_sequence_maxsz + \
 520                                 decode_putfh_maxsz + \
 521                                 decode_lock_maxsz)
 522 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 523                                 encode_sequence_maxsz + \
 524                                 encode_putfh_maxsz + \
 525                                 encode_lockt_maxsz)
 526 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 527                                  decode_sequence_maxsz + \
 528                                  decode_putfh_maxsz + \
 529                                  decode_lockt_maxsz)
 530 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 531                                 encode_sequence_maxsz + \
 532                                 encode_putfh_maxsz + \
 533                                 encode_locku_maxsz)
 534 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 535                                 decode_sequence_maxsz + \
 536                                 decode_putfh_maxsz + \
 537                                 decode_locku_maxsz)
 538 #define NFS4_enc_release_lockowner_sz \
 539                                 (compound_encode_hdr_maxsz + \
 540                                  encode_lockowner_maxsz)
 541 #define NFS4_dec_release_lockowner_sz \
 542                                 (compound_decode_hdr_maxsz + \
 543                                  decode_lockowner_maxsz)
 544 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 545                                 encode_sequence_maxsz + \
 546                                 encode_putfh_maxsz + \
 547                                 encode_access_maxsz + \
 548                                 encode_getattr_maxsz)
 549 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 550                                 decode_sequence_maxsz + \
 551                                 decode_putfh_maxsz + \
 552                                 decode_access_maxsz + \
 553                                 decode_getattr_maxsz)
 554 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 555                                 encode_sequence_maxsz + \
 556                                 encode_putfh_maxsz + \
 557                                 encode_getattr_maxsz)
 558 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 559                                 decode_sequence_maxsz + \
 560                                 decode_putfh_maxsz + \
 561                                 decode_getattr_maxsz)
 562 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 563                                 encode_sequence_maxsz + \
 564                                 encode_putfh_maxsz + \
 565                                 encode_lookup_maxsz + \
 566                                 encode_getattr_maxsz + \
 567                                 encode_getfh_maxsz)
 568 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 569                                 decode_sequence_maxsz + \
 570                                 decode_putfh_maxsz + \
 571                                 decode_lookup_maxsz + \
 572                                 decode_getattr_maxsz + \
 573                                 decode_getfh_maxsz)
 574 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 575                                 encode_sequence_maxsz + \
 576                                 encode_putrootfh_maxsz + \
 577                                 encode_getattr_maxsz + \
 578                                 encode_getfh_maxsz)
 579 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 580                                 decode_sequence_maxsz + \
 581                                 decode_putrootfh_maxsz + \
 582                                 decode_getattr_maxsz + \
 583                                 decode_getfh_maxsz)
 584 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 585                                 encode_sequence_maxsz + \
 586                                 encode_putfh_maxsz + \
 587                                 encode_remove_maxsz + \
 588                                 encode_getattr_maxsz)
 589 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 590                                 decode_sequence_maxsz + \
 591                                 decode_putfh_maxsz + \
 592                                 decode_remove_maxsz + \
 593                                 decode_getattr_maxsz)
 594 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 595                                 encode_sequence_maxsz + \
 596                                 encode_putfh_maxsz + \
 597                                 encode_savefh_maxsz + \
 598                                 encode_putfh_maxsz + \
 599                                 encode_rename_maxsz + \
 600                                 encode_getattr_maxsz + \
 601                                 encode_restorefh_maxsz + \
 602                                 encode_getattr_maxsz)
 603 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 604                                 decode_sequence_maxsz + \
 605                                 decode_putfh_maxsz + \
 606                                 decode_savefh_maxsz + \
 607                                 decode_putfh_maxsz + \
 608                                 decode_rename_maxsz + \
 609                                 decode_getattr_maxsz + \
 610                                 decode_restorefh_maxsz + \
 611                                 decode_getattr_maxsz)
 612 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 613                                 encode_sequence_maxsz + \
 614                                 encode_putfh_maxsz + \
 615                                 encode_savefh_maxsz + \
 616                                 encode_putfh_maxsz + \
 617                                 encode_link_maxsz + \
 618                                 decode_getattr_maxsz + \
 619                                 encode_restorefh_maxsz + \
 620                                 decode_getattr_maxsz)
 621 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 622                                 decode_sequence_maxsz + \
 623                                 decode_putfh_maxsz + \
 624                                 decode_savefh_maxsz + \
 625                                 decode_putfh_maxsz + \
 626                                 decode_link_maxsz + \
 627                                 decode_getattr_maxsz + \
 628                                 decode_restorefh_maxsz + \
 629                                 decode_getattr_maxsz)
 630 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 631                                 encode_sequence_maxsz + \
 632                                 encode_putfh_maxsz + \
 633                                 encode_symlink_maxsz + \
 634                                 encode_getattr_maxsz + \
 635                                 encode_getfh_maxsz)
 636 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 637                                 decode_sequence_maxsz + \
 638                                 decode_putfh_maxsz + \
 639                                 decode_symlink_maxsz + \
 640                                 decode_getattr_maxsz + \
 641                                 decode_getfh_maxsz)
 642 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 643                                 encode_sequence_maxsz + \
 644                                 encode_putfh_maxsz + \
 645                                 encode_savefh_maxsz + \
 646                                 encode_create_maxsz + \
 647                                 encode_getfh_maxsz + \
 648                                 encode_getattr_maxsz + \
 649                                 encode_restorefh_maxsz + \
 650                                 encode_getattr_maxsz)
 651 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 652                                 decode_sequence_maxsz + \
 653                                 decode_putfh_maxsz + \
 654                                 decode_savefh_maxsz + \
 655                                 decode_create_maxsz + \
 656                                 decode_getfh_maxsz + \
 657                                 decode_getattr_maxsz + \
 658                                 decode_restorefh_maxsz + \
 659                                 decode_getattr_maxsz)
 660 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 661                                 encode_sequence_maxsz + \
 662                                 encode_putfh_maxsz + \
 663                                 encode_getattr_maxsz)
 664 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 665                                 decode_sequence_maxsz + \
 666                                 decode_putfh_maxsz + \
 667                                 decode_getattr_maxsz)
 668 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 669                                 encode_sequence_maxsz + \
 670                                 encode_putfh_maxsz + \
 671                                 encode_statfs_maxsz)
 672 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 673                                 decode_sequence_maxsz + \
 674                                 decode_putfh_maxsz + \
 675                                 decode_statfs_maxsz)
 676 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 677                                 encode_sequence_maxsz + \
 678                                 encode_putfh_maxsz + \
 679                                 encode_getattr_maxsz)
 680 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 681                                 decode_sequence_maxsz + \
 682                                 decode_putfh_maxsz + \
 683                                 decode_getattr_maxsz)
 684 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 685                                 encode_sequence_maxsz + \
 686                                 encode_putfh_maxsz + \
 687                                 encode_delegreturn_maxsz + \
 688                                 encode_getattr_maxsz)
 689 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 690                                 decode_sequence_maxsz + \
 691                                 decode_delegreturn_maxsz + \
 692                                 decode_getattr_maxsz)
 693 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 694                                 encode_sequence_maxsz + \
 695                                 encode_putfh_maxsz + \
 696                                 encode_getacl_maxsz)
 697 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 698                                 decode_sequence_maxsz + \
 699                                 decode_putfh_maxsz + \
 700                                 decode_getacl_maxsz)
 701 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 702                                 encode_sequence_maxsz + \
 703                                 encode_putfh_maxsz + \
 704                                 encode_setacl_maxsz)
 705 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 706                                 decode_sequence_maxsz + \
 707                                 decode_putfh_maxsz + \
 708                                 decode_setacl_maxsz)
 709 #define NFS4_enc_fs_locations_sz \
 710                                 (compound_encode_hdr_maxsz + \
 711                                  encode_sequence_maxsz + \
 712                                  encode_putfh_maxsz + \
 713                                  encode_lookup_maxsz + \
 714                                  encode_fs_locations_maxsz)
 715 #define NFS4_dec_fs_locations_sz \
 716                                 (compound_decode_hdr_maxsz + \
 717                                  decode_sequence_maxsz + \
 718                                  decode_putfh_maxsz + \
 719                                  decode_lookup_maxsz + \
 720                                  decode_fs_locations_maxsz)
 721 #define NFS4_enc_secinfo_sz     (compound_encode_hdr_maxsz + \
 722                                 encode_sequence_maxsz + \
 723                                 encode_putfh_maxsz + \
 724                                 encode_secinfo_maxsz)
 725 #define NFS4_dec_secinfo_sz     (compound_decode_hdr_maxsz + \
 726                                 decode_sequence_maxsz + \
 727                                 decode_putfh_maxsz + \
 728                                 decode_secinfo_maxsz)
 729 #if defined(CONFIG_NFS_V4_1)
 730 #define NFS4_enc_exchange_id_sz \
 731                                 (compound_encode_hdr_maxsz + \
 732                                  encode_exchange_id_maxsz)
 733 #define NFS4_dec_exchange_id_sz \
 734                                 (compound_decode_hdr_maxsz + \
 735                                  decode_exchange_id_maxsz)
 736 #define NFS4_enc_create_session_sz \
 737                                 (compound_encode_hdr_maxsz + \
 738                                  encode_create_session_maxsz)
 739 #define NFS4_dec_create_session_sz \
 740                                 (compound_decode_hdr_maxsz + \
 741                                  decode_create_session_maxsz)
 742 #define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
 743                                          encode_destroy_session_maxsz)
 744 #define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
 745                                          decode_destroy_session_maxsz)
 746 #define NFS4_enc_sequence_sz \
 747                                 (compound_decode_hdr_maxsz + \
 748                                  encode_sequence_maxsz)
 749 #define NFS4_dec_sequence_sz \
 750                                 (compound_decode_hdr_maxsz + \
 751                                  decode_sequence_maxsz)
 752 #define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
 753                                          encode_sequence_maxsz + \
 754                                          encode_putrootfh_maxsz + \
 755                                          encode_fsinfo_maxsz)
 756 #define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
 757                                          decode_sequence_maxsz + \
 758                                          decode_putrootfh_maxsz + \
 759                                          decode_fsinfo_maxsz)
 760 #define NFS4_enc_reclaim_complete_sz    (compound_encode_hdr_maxsz + \
 761                                          encode_sequence_maxsz + \
 762                                          encode_reclaim_complete_maxsz)
 763 #define NFS4_dec_reclaim_complete_sz    (compound_decode_hdr_maxsz + \
 764                                          decode_sequence_maxsz + \
 765                                          decode_reclaim_complete_maxsz)
 766 #define NFS4_enc_getdevicelist_sz (compound_encode_hdr_maxsz + \
 767                                 encode_sequence_maxsz + \
 768                                 encode_putfh_maxsz + \
 769                                 encode_getdevicelist_maxsz)
 770 #define NFS4_dec_getdevicelist_sz (compound_decode_hdr_maxsz + \
 771                                 decode_sequence_maxsz + \
 772                                 decode_putfh_maxsz + \
 773                                 decode_getdevicelist_maxsz)
 774 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
 775                                 encode_sequence_maxsz +\
 776                                 encode_getdeviceinfo_maxsz)
 777 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
 778                                 decode_sequence_maxsz + \
 779                                 decode_getdeviceinfo_maxsz)
 780 #define NFS4_enc_layoutget_sz   (compound_encode_hdr_maxsz + \
 781                                 encode_sequence_maxsz + \
 782                                 encode_putfh_maxsz +        \
 783                                 encode_layoutget_maxsz)
 784 #define NFS4_dec_layoutget_sz   (compound_decode_hdr_maxsz + \
 785                                 decode_sequence_maxsz + \
 786                                 decode_putfh_maxsz +        \
 787                                 decode_layoutget_maxsz)
 788 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
 789                                 encode_sequence_maxsz +\
 790                                 encode_putfh_maxsz + \
 791                                 encode_layoutcommit_maxsz + \
 792                                 encode_getattr_maxsz)
 793 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
 794                                 decode_sequence_maxsz + \
 795                                 decode_putfh_maxsz + \
 796                                 decode_layoutcommit_maxsz + \
 797                                 decode_getattr_maxsz)
 798 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
 799                                 encode_sequence_maxsz + \
 800                                 encode_putfh_maxsz + \
 801                                 encode_layoutreturn_maxsz)
 802 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
 803                                 decode_sequence_maxsz + \
 804                                 decode_putfh_maxsz + \
 805                                 decode_layoutreturn_maxsz)
 806 #define NFS4_enc_secinfo_no_name_sz     (compound_encode_hdr_maxsz + \
 807                                         encode_sequence_maxsz + \
 808                                         encode_putrootfh_maxsz +\
 809                                         encode_secinfo_no_name_maxsz)
 810 #define NFS4_dec_secinfo_no_name_sz     (compound_decode_hdr_maxsz + \
 811                                         decode_sequence_maxsz + \
 812                                         decode_putrootfh_maxsz + \
 813                                         decode_secinfo_no_name_maxsz)
 814 #define NFS4_enc_test_stateid_sz        (compound_encode_hdr_maxsz + \
 815                                          encode_sequence_maxsz + \
 816                                          encode_test_stateid_maxsz)
 817 #define NFS4_dec_test_stateid_sz        (compound_decode_hdr_maxsz + \
 818                                          decode_sequence_maxsz + \
 819                                          decode_test_stateid_maxsz)
 820 #define NFS4_enc_free_stateid_sz        (compound_encode_hdr_maxsz + \
 821                                          encode_sequence_maxsz + \
 822                                          encode_free_stateid_maxsz)
 823 #define NFS4_dec_free_stateid_sz        (compound_decode_hdr_maxsz + \
 824                                          decode_sequence_maxsz + \
 825                                          decode_free_stateid_maxsz)
 826
 827 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 828                                       compound_encode_hdr_maxsz +
 829                                       encode_sequence_maxsz +
 830                                       encode_putfh_maxsz +
 831                                       encode_getattr_maxsz) *
 832                                      XDR_UNIT);
 833
 834 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 835                                      compound_decode_hdr_maxsz +
 836                                      decode_sequence_maxsz +
 837                                      decode_putfh_maxsz) *
 838                                     XDR_UNIT);
 839 #endif /* CONFIG_NFS_V4_1 */
 840
 841 static const umode_t nfs_type2fmt[] = {
 842         [NF4BAD] = 0,
 843         [NF4REG] = S_IFREG,
 844         [NF4DIR] = S_IFDIR,
 845         [NF4BLK] = S_IFBLK,
 846         [NF4CHR] = S_IFCHR,
 847         [NF4LNK] = S_IFLNK,
 848         [NF4SOCK] = S_IFSOCK,
 849         [NF4FIFO] = S_IFIFO,
 850         [NF4ATTRDIR] = 0,
 851         [NF4NAMEDATTR] = 0,
 852 };
 853
 854 struct compound_hdr {
 855         int32_t         status;
 856         uint32_t        nops;
 857         __be32 *        nops_p;
 858         uint32_t        taglen;
 859         char *          tag;
 860         uint32_t        replen;         /* expected reply words */
 861         u32             minorversion;
 862 };
 863
 864 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
 865 {
 866         __be32 *p = xdr_reserve_space(xdr, nbytes);
 867         BUG_ON(!p);
 868         return p;
 869 }
 870
 871 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 872 {
 873         __be32 *p;
 874
 875         p = xdr_reserve_space(xdr, 4 + len);
 876         BUG_ON(p == NULL);
 877         xdr_encode_opaque(p, str, len);
 878 }
 879
 880 static void encode_compound_hdr(struct xdr_stream *xdr,
 881                                 struct rpc_rqst *req,
 882                                 struct compound_hdr *hdr)
 883 {
 884         __be32 *p;
 885         struct rpc_auth *auth = req->rq_cred->cr_auth;
 886
 887         /* initialize running count of expected bytes in reply.
 888          * NOTE: the replied tag SHOULD be the same is the one sent,
 889          * but this is not required as a MUST for the server to do so. */
 890         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
 891
 892         dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
 893         BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
 894         p = reserve_space(xdr, 4 + hdr->taglen + 8);
 895         p = xdr_encode_opaque(p, hdr->tag, hdr->taglen);
 896         *p++ = cpu_to_be32(hdr->minorversion);
 897         hdr->nops_p = p;
 898         *p = cpu_to_be32(hdr->nops);
 899 }
 900
 901 static void encode_nops(struct compound_hdr *hdr)
 902 {
 903         BUG_ON(hdr->nops > NFS4_MAX_OPS);
 904         *hdr->nops_p = htonl(hdr->nops);
 905 }
 906
 907 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 908 {
 909         __be32 *p;
 910
 911         p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
 912         BUG_ON(p == NULL);
 913         xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
 914 }
 915
 916 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
 917 {
 918         char owner_name[IDMAP_NAMESZ];
 919         char owner_group[IDMAP_NAMESZ];
 920         int owner_namelen = 0;
 921         int owner_grouplen = 0;
 922         __be32 *p;
 923         __be32 *q;
 924         int len;
 925         uint32_t bmval0 = 0;
 926         uint32_t bmval1 = 0;
 927
 928         /*
 929          * We reserve enough space to write the entire attribute buffer at once.
 930          * In the worst-case, this would be
 931          *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
 932          *          = 36 bytes, plus any contribution from variable-length fields
 933          *            such as owner/group.
 934          */
 935         len = 16;
 936
 937         /* Sigh */
 938         if (iap->ia_valid & ATTR_SIZE)
 939                 len += 8;
 940         if (iap->ia_valid & ATTR_MODE)
 941                 len += 4;
 942         if (iap->ia_valid & ATTR_UID) {
 943                 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
 944                 if (owner_namelen < 0) {
 945                         dprintk("nfs: couldn't resolve uid %d to string\n",
 946                                         iap->ia_uid);
 947                         /* XXX */
 948                         strcpy(owner_name, "nobody");
 949                         owner_namelen = sizeof("nobody") - 1;
 950                         /* goto out; */
 951                 }
 952                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
 953         }
 954         if (iap->ia_valid & ATTR_GID) {
 955                 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
 956                 if (owner_grouplen < 0) {
 957                         dprintk("nfs: couldn't resolve gid %d to string\n",
 958                                         iap->ia_gid);
 959                         strcpy(owner_group, "nobody");
 960                         owner_grouplen = sizeof("nobody") - 1;
 961                         /* goto out; */
 962                 }
 963                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
 964         }
 965         if (iap->ia_valid & ATTR_ATIME_SET)
 966                 len += 16;
 967         else if (iap->ia_valid & ATTR_ATIME)
 968                 len += 4;
 969         if (iap->ia_valid & ATTR_MTIME_SET)
 970                 len += 16;
 971         else if (iap->ia_valid & ATTR_MTIME)
 972                 len += 4;
 973         p = reserve_space(xdr, len);
 974
 975         /*
 976          * We write the bitmap length now, but leave the bitmap and the attribute
 977          * buffer length to be backfilled at the end of this routine.
 978          */
 979         *p++ = cpu_to_be32(2);
 980         q = p;
 981         p += 3;
 982
 983         if (iap->ia_valid & ATTR_SIZE) {
 984                 bmval0 |= FATTR4_WORD0_SIZE;
 985                 p = xdr_encode_hyper(p, iap->ia_size);
 986         }
 987         if (iap->ia_valid & ATTR_MODE) {
 988                 bmval1 |= FATTR4_WORD1_MODE;
 989                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
 990         }
 991         if (iap->ia_valid & ATTR_UID) {
 992                 bmval1 |= FATTR4_WORD1_OWNER;
 993                 p = xdr_encode_opaque(p, owner_name, owner_namelen);
 994         }
 995         if (iap->ia_valid & ATTR_GID) {
 996                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
 997                 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
 998         }
 999         if (iap->ia_valid & ATTR_ATIME_SET) {
1000                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
1001                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1002                 *p++ = cpu_to_be32(0);
1003                 *p++ = cpu_to_be32(iap->ia_atime.tv_sec);
1004                 *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
1005         }
1006         else if (iap->ia_valid & ATTR_ATIME) {
1007                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
1008                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1009         }
1010         if (iap->ia_valid & ATTR_MTIME_SET) {
1011                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
1012                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1013                 *p++ = cpu_to_be32(0);
1014                 *p++ = cpu_to_be32(iap->ia_mtime.tv_sec);
1015                 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1016         }
1017         else if (iap->ia_valid & ATTR_MTIME) {
1018                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
1019                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1020         }
1021
1022         /*
1023          * Now we backfill the bitmap and the attribute buffer length.
1024          */
1025         if (len != ((char *)p - (char *)q) + 4) {
1026                 printk(KERN_ERR "nfs: Attr length error, %u != %Zu\n",
1027                                 len, ((char *)p - (char *)q) + 4);
1028                 BUG();
1029         }
1030         len = (char *)p - (char *)q - 12;
1031         *q++ = htonl(bmval0);
1032         *q++ = htonl(bmval1);
1033         *q = htonl(len);
1034
1035 /* out: */
1036 }
1037
1038 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1039 {
1040         __be32 *p;
1041
1042         p = reserve_space(xdr, 8);
1043         *p++ = cpu_to_be32(OP_ACCESS);
1044         *p = cpu_to_be32(access);
1045         hdr->nops++;
1046         hdr->replen += decode_access_maxsz;
1047 }
1048
1049 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1050 {
1051         __be32 *p;
1052
1053         p = reserve_space(xdr, 8+NFS4_STATEID_SIZE);
1054         *p++ = cpu_to_be32(OP_CLOSE);
1055         *p++ = cpu_to_be32(arg->seqid->sequence->counter);
1056         xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1057         hdr->nops++;
1058         hdr->replen += decode_close_maxsz;
1059 }
1060
1061 static void encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1062 {
1063         __be32 *p;
1064
1065         p = reserve_space(xdr, 16);
1066         *p++ = cpu_to_be32(OP_COMMIT);
1067         p = xdr_encode_hyper(p, args->offset);
1068         *p = cpu_to_be32(args->count);
1069         hdr->nops++;
1070         hdr->replen += decode_commit_maxsz;
1071 }
1072
1073 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1074 {
1075         __be32 *p;
1076
1077         p = reserve_space(xdr, 8);
1078         *p++ = cpu_to_be32(OP_CREATE);
1079         *p = cpu_to_be32(create->ftype);
1080
1081         switch (create->ftype) {
1082         case NF4LNK:
1083                 p = reserve_space(xdr, 4);
1084                 *p = cpu_to_be32(create->u.symlink.len);
1085                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
1086                 break;
1087
1088         case NF4BLK: case NF4CHR:
1089                 p = reserve_space(xdr, 8);
1090                 *p++ = cpu_to_be32(create->u.device.specdata1);
1091                 *p = cpu_to_be32(create->u.device.specdata2);
1092                 break;
1093
1094         default:
1095                 break;
1096         }
1097
1098         encode_string(xdr, create->name->len, create->name->name);
1099         hdr->nops++;
1100         hdr->replen += decode_create_maxsz;
1101
1102         encode_attrs(xdr, create->attrs, create->server);
1103 }
1104
1105 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1106 {
1107         __be32 *p;
1108
1109         p = reserve_space(xdr, 12);
1110         *p++ = cpu_to_be32(OP_GETATTR);
1111         *p++ = cpu_to_be32(1);
1112         *p = cpu_to_be32(bitmap);
1113         hdr->nops++;
1114         hdr->replen += decode_getattr_maxsz;
1115 }
1116
1117 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1118 {
1119         __be32 *p;
1120
1121         p = reserve_space(xdr, 16);
1122         *p++ = cpu_to_be32(OP_GETATTR);
1123         *p++ = cpu_to_be32(2);
1124         *p++ = cpu_to_be32(bm0);
1125         *p = cpu_to_be32(bm1);
1126         hdr->nops++;
1127         hdr->replen += decode_getattr_maxsz;
1128 }
1129
1130 static void
1131 encode_getattr_three(struct xdr_stream *xdr,
1132                      uint32_t bm0, uint32_t bm1, uint32_t bm2,
1133                      struct compound_hdr *hdr)
1134 {
1135         __be32 *p;
1136
1137         p = reserve_space(xdr, 4);
1138         *p = cpu_to_be32(OP_GETATTR);
1139         if (bm2) {
1140                 p = reserve_space(xdr, 16);
1141                 *p++ = cpu_to_be32(3);
1142                 *p++ = cpu_to_be32(bm0);
1143                 *p++ = cpu_to_be32(bm1);
1144                 *p = cpu_to_be32(bm2);
1145         } else if (bm1) {
1146                 p = reserve_space(xdr, 12);
1147                 *p++ = cpu_to_be32(2);
1148                 *p++ = cpu_to_be32(bm0);
1149                 *p = cpu_to_be32(bm1);
1150         } else {
1151                 p = reserve_space(xdr, 8);
1152                 *p++ = cpu_to_be32(1);
1153                 *p = cpu_to_be32(bm0);
1154         }
1155         hdr->nops++;
1156         hdr->replen += decode_getattr_maxsz;
1157 }
1158
1159 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1160 {
1161         encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1162                            bitmask[1] & nfs4_fattr_bitmap[1], hdr);
1163 }
1164
1165 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1166 {
1167         encode_getattr_three(xdr,
1168                              bitmask[0] & nfs4_fsinfo_bitmap[0],
1169                              bitmask[1] & nfs4_fsinfo_bitmap[1],
1170                              bitmask[2] & nfs4_fsinfo_bitmap[2],
1171                              hdr);
1172 }
1173
1174 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1175 {
1176         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1177                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1178 }
1179
1180 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1181 {
1182         __be32 *p;
1183
1184         p = reserve_space(xdr, 4);
1185         *p = cpu_to_be32(OP_GETFH);
1186         hdr->nops++;
1187         hdr->replen += decode_getfh_maxsz;
1188 }
1189
1190 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1191 {
1192         __be32 *p;
1193
1194         p = reserve_space(xdr, 8 + name->len);
1195         *p++ = cpu_to_be32(OP_LINK);
1196         xdr_encode_opaque(p, name->name, name->len);
1197         hdr->nops++;
1198         hdr->replen += decode_link_maxsz;
1199 }
1200
1201 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1202 {
1203         if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
1204                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1205         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1206 }
1207
1208 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1209 {
1210         if (fl->fl_end == OFFSET_MAX)
1211                 return ~(uint64_t)0;
1212         return fl->fl_end - fl->fl_start + 1;
1213 }
1214
1215 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1216 {
1217         __be32 *p;
1218
1219         p = reserve_space(xdr, 32);
1220         p = xdr_encode_hyper(p, lowner->clientid);
1221         *p++ = cpu_to_be32(20);
1222         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1223         *p++ = cpu_to_be32(lowner->s_dev);
1224         xdr_encode_hyper(p, lowner->id);
1225 }
1226
1227 /*
1228  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1229  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1230  */
1231 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1232 {
1233         __be32 *p;
1234
1235         p = reserve_space(xdr, 32);
1236         *p++ = cpu_to_be32(OP_LOCK);
1237         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1238         *p++ = cpu_to_be32(args->reclaim);
1239         p = xdr_encode_hyper(p, args->fl->fl_start);
1240         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1241         *p = cpu_to_be32(args->new_lock_owner);
1242         if (args->new_lock_owner){
1243                 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1244                 *p++ = cpu_to_be32(args->open_seqid->sequence->counter);
1245                 p = xdr_encode_opaque_fixed(p, args->open_stateid->data, NFS4_STATEID_SIZE);
1246                 *p++ = cpu_to_be32(args->lock_seqid->sequence->counter);
1247                 encode_lockowner(xdr, &args->lock_owner);
1248         }
1249         else {
1250                 p = reserve_space(xdr, NFS4_STATEID_SIZE+4);
1251                 p = xdr_encode_opaque_fixed(p, args->lock_stateid->data, NFS4_STATEID_SIZE);
1252                 *p = cpu_to_be32(args->lock_seqid->sequence->counter);
1253         }
1254         hdr->nops++;
1255         hdr->replen += decode_lock_maxsz;
1256 }
1257
1258 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1259 {
1260         __be32 *p;
1261
1262         p = reserve_space(xdr, 24);
1263         *p++ = cpu_to_be32(OP_LOCKT);
1264         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1265         p = xdr_encode_hyper(p, args->fl->fl_start);
1266         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1267         encode_lockowner(xdr, &args->lock_owner);
1268         hdr->nops++;
1269         hdr->replen += decode_lockt_maxsz;
1270 }
1271
1272 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1273 {
1274         __be32 *p;
1275
1276         p = reserve_space(xdr, 12+NFS4_STATEID_SIZE+16);
1277         *p++ = cpu_to_be32(OP_LOCKU);
1278         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1279         *p++ = cpu_to_be32(args->seqid->sequence->counter);
1280         p = xdr_encode_opaque_fixed(p, args->stateid->data, NFS4_STATEID_SIZE);
1281         p = xdr_encode_hyper(p, args->fl->fl_start);
1282         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1283         hdr->nops++;
1284         hdr->replen += decode_locku_maxsz;
1285 }
1286
1287 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1288 {
1289         __be32 *p;
1290
1291         p = reserve_space(xdr, 4);
1292         *p = cpu_to_be32(OP_RELEASE_LOCKOWNER);
1293         encode_lockowner(xdr, lowner);
1294         hdr->nops++;
1295         hdr->replen += decode_release_lockowner_maxsz;
1296 }
1297
1298 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1299 {
1300         int len = name->len;
1301         __be32 *p;
1302
1303         p = reserve_space(xdr, 8 + len);
1304         *p++ = cpu_to_be32(OP_LOOKUP);
1305         xdr_encode_opaque(p, name->name, len);
1306         hdr->nops++;
1307         hdr->replen += decode_lookup_maxsz;
1308 }
1309
1310 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1311 {
1312         __be32 *p;
1313
1314         p = reserve_space(xdr, 8);
1315         switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1316         case FMODE_READ:
1317                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1318                 break;
1319         case FMODE_WRITE:
1320                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1321                 break;
1322         case FMODE_READ|FMODE_WRITE:
1323                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1324                 break;
1325         default:
1326                 *p++ = cpu_to_be32(0);
1327         }
1328         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1329 }
1330
1331 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1332 {
1333         __be32 *p;
1334  /*
1335  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1336  * owner 4 = 32
1337  */
1338         p = reserve_space(xdr, 8);
1339         *p++ = cpu_to_be32(OP_OPEN);
1340         *p = cpu_to_be32(arg->seqid->sequence->counter);
1341         encode_share_access(xdr, arg->fmode);
1342         p = reserve_space(xdr, 32);
1343         p = xdr_encode_hyper(p, arg->clientid);
1344         *p++ = cpu_to_be32(20);
1345         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1346         *p++ = cpu_to_be32(arg->server->s_dev);
1347         xdr_encode_hyper(p, arg->id);
1348 }
1349
1350 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1351 {
1352         __be32 *p;
1353         struct nfs_client *clp;
1354
1355         p = reserve_space(xdr, 4);
1356         switch(arg->open_flags & O_EXCL) {
1357         case 0:
1358                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1359                 encode_attrs(xdr, arg->u.attrs, arg->server);
1360                 break;
1361         default:
1362                 clp = arg->server->nfs_client;
1363                 if (clp->cl_mvops->minor_version > 0) {
1364                         if (nfs4_has_persistent_session(clp)) {
1365                                 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1366                                 encode_attrs(xdr, arg->u.attrs, arg->server);
1367                         } else {
1368                                 struct iattr dummy;
1369
1370                                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1371                                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1372                                 dummy.ia_valid = 0;
1373                                 encode_attrs(xdr, &dummy, arg->server);
1374                         }
1375                 } else {
1376                         *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1377                         encode_nfs4_verifier(xdr, &arg->u.verifier);
1378                 }
1379         }
1380 }
1381
1382 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1383 {
1384         __be32 *p;
1385
1386         p = reserve_space(xdr, 4);
1387         switch (arg->open_flags & O_CREAT) {
1388         case 0:
1389                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1390                 break;
1391         default:
1392                 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1393                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1394                 encode_createmode(xdr, arg);
1395         }
1396 }
1397
1398 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1399 {
1400         __be32 *p;
1401
1402         p = reserve_space(xdr, 4);
1403         switch (delegation_type) {
1404         case 0:
1405                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1406                 break;
1407         case FMODE_READ:
1408                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1409                 break;
1410         case FMODE_WRITE|FMODE_READ:
1411                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1412                 break;
1413         default:
1414                 BUG();
1415         }
1416 }
1417
1418 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1419 {
1420         __be32 *p;
1421
1422         p = reserve_space(xdr, 4);
1423         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1424         encode_string(xdr, name->len, name->name);
1425 }
1426
1427 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1428 {
1429         __be32 *p;
1430
1431         p = reserve_space(xdr, 4);
1432         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1433         encode_delegation_type(xdr, type);
1434 }
1435
1436 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1437 {
1438         __be32 *p;
1439
1440         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1441         *p++ = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1442         xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1443         encode_string(xdr, name->len, name->name);
1444 }
1445
1446 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1447 {
1448         encode_openhdr(xdr, arg);
1449         encode_opentype(xdr, arg);
1450         switch (arg->claim) {
1451         case NFS4_OPEN_CLAIM_NULL:
1452                 encode_claim_null(xdr, arg->name);
1453                 break;
1454         case NFS4_OPEN_CLAIM_PREVIOUS:
1455                 encode_claim_previous(xdr, arg->u.delegation_type);
1456                 break;
1457         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1458                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1459                 break;
1460         default:
1461                 BUG();
1462         }
1463         hdr->nops++;
1464         hdr->replen += decode_open_maxsz;
1465 }
1466
1467 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1468 {
1469         __be32 *p;
1470
1471         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1472         *p++ = cpu_to_be32(OP_OPEN_CONFIRM);
1473         p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1474         *p = cpu_to_be32(arg->seqid->sequence->counter);
1475         hdr->nops++;
1476         hdr->replen += decode_open_confirm_maxsz;
1477 }
1478
1479 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1480 {
1481         __be32 *p;
1482
1483         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1484         *p++ = cpu_to_be32(OP_OPEN_DOWNGRADE);
1485         p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1486         *p = cpu_to_be32(arg->seqid->sequence->counter);
1487         encode_share_access(xdr, arg->fmode);
1488         hdr->nops++;
1489         hdr->replen += decode_open_downgrade_maxsz;
1490 }
1491
1492 static void
1493 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1494 {
1495         int len = fh->size;
1496         __be32 *p;
1497
1498         p = reserve_space(xdr, 8 + len);
1499         *p++ = cpu_to_be32(OP_PUTFH);
1500         xdr_encode_opaque(p, fh->data, len);
1501         hdr->nops++;
1502         hdr->replen += decode_putfh_maxsz;
1503 }
1504
1505 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1506 {
1507         __be32 *p;
1508
1509         p = reserve_space(xdr, 4);
1510         *p = cpu_to_be32(OP_PUTROOTFH);
1511         hdr->nops++;
1512         hdr->replen += decode_putrootfh_maxsz;
1513 }
1514
1515 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx, const struct nfs_lock_context *l_ctx, int zero_seqid)
1516 {
1517         nfs4_stateid stateid;
1518         __be32 *p;
1519
1520         p = reserve_space(xdr, NFS4_STATEID_SIZE);
1521         if (ctx->state != NULL) {
1522                 nfs4_copy_stateid(&stateid, ctx->state, l_ctx->lockowner, l_ctx->pid);
1523                 if (zero_seqid)
1524                         stateid.stateid.seqid = 0;
1525                 xdr_encode_opaque_fixed(p, stateid.data, NFS4_STATEID_SIZE);
1526         } else
1527                 xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1528 }
1529
1530 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1531 {
1532         __be32 *p;
1533
1534         p = reserve_space(xdr, 4);
1535         *p = cpu_to_be32(OP_READ);
1536
1537         encode_stateid(xdr, args->context, args->lock_context,
1538                        hdr->minorversion);
1539
1540         p = reserve_space(xdr, 12);
1541         p = xdr_encode_hyper(p, args->offset);
1542         *p = cpu_to_be32(args->count);
1543         hdr->nops++;
1544         hdr->replen += decode_read_maxsz;
1545 }
1546
1547 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1548 {
1549         uint32_t attrs[2] = {
1550                 FATTR4_WORD0_RDATTR_ERROR,
1551                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1552         };
1553         uint32_t dircount = readdir->count >> 1;
1554         __be32 *p;
1555
1556         if (readdir->plus) {
1557                 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1558                         FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1559                 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1560                         FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1561                         FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1562                         FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1563                 dircount >>= 1;
1564         }
1565         /* Use mounted_on_fileid only if the server supports it */
1566         if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1567                 attrs[0] |= FATTR4_WORD0_FILEID;
1568
1569         p = reserve_space(xdr, 12+NFS4_VERIFIER_SIZE+20);
1570         *p++ = cpu_to_be32(OP_READDIR);
1571         p = xdr_encode_hyper(p, readdir->cookie);
1572         p = xdr_encode_opaque_fixed(p, readdir->verifier.data, NFS4_VERIFIER_SIZE);
1573         *p++ = cpu_to_be32(dircount);
1574         *p++ = cpu_to_be32(readdir->count);
1575         *p++ = cpu_to_be32(2);
1576
1577         *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1578         *p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1579         hdr->nops++;
1580         hdr->replen += decode_readdir_maxsz;
1581         dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1582                         __func__,
1583                         (unsigned long long)readdir->cookie,
1584                         ((u32 *)readdir->verifier.data)[0],
1585                         ((u32 *)readdir->verifier.data)[1],
1586                         attrs[0] & readdir->bitmask[0],
1587                         attrs[1] & readdir->bitmask[1]);
1588 }
1589
1590 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1591 {
1592         __be32 *p;
1593
1594         p = reserve_space(xdr, 4);
1595         *p = cpu_to_be32(OP_READLINK);
1596         hdr->nops++;
1597         hdr->replen += decode_readlink_maxsz;
1598 }
1599
1600 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1601 {
1602         __be32 *p;
1603
1604         p = reserve_space(xdr, 8 + name->len);
1605         *p++ = cpu_to_be32(OP_REMOVE);
1606         xdr_encode_opaque(p, name->name, name->len);
1607         hdr->nops++;
1608         hdr->replen += decode_remove_maxsz;
1609 }
1610
1611 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1612 {
1613         __be32 *p;
1614
1615         p = reserve_space(xdr, 4);
1616         *p = cpu_to_be32(OP_RENAME);
1617         encode_string(xdr, oldname->len, oldname->name);
1618         encode_string(xdr, newname->len, newname->name);
1619         hdr->nops++;
1620         hdr->replen += decode_rename_maxsz;
1621 }
1622
1623 static void encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid, struct compound_hdr *hdr)
1624 {
1625         __be32 *p;
1626
1627         p = reserve_space(xdr, 12);
1628         *p++ = cpu_to_be32(OP_RENEW);
1629         xdr_encode_hyper(p, client_stateid->cl_clientid);
1630         hdr->nops++;
1631         hdr->replen += decode_renew_maxsz;
1632 }
1633
1634 static void
1635 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1636 {
1637         __be32 *p;
1638
1639         p = reserve_space(xdr, 4);
1640         *p = cpu_to_be32(OP_RESTOREFH);
1641         hdr->nops++;
1642         hdr->replen += decode_restorefh_maxsz;
1643 }
1644
1645 static void
1646 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1647 {
1648         __be32 *p;
1649
1650         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1651         *p++ = cpu_to_be32(OP_SETATTR);
1652         xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1653         p = reserve_space(xdr, 2*4);
1654         *p++ = cpu_to_be32(1);
1655         *p = cpu_to_be32(FATTR4_WORD0_ACL);
1656         BUG_ON(arg->acl_len % 4);
1657         p = reserve_space(xdr, 4);
1658         *p = cpu_to_be32(arg->acl_len);
1659         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1660         hdr->nops++;
1661         hdr->replen += decode_setacl_maxsz;
1662 }
1663
1664 static void
1665 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1666 {
1667         __be32 *p;
1668
1669         p = reserve_space(xdr, 4);
1670         *p = cpu_to_be32(OP_SAVEFH);
1671         hdr->nops++;
1672         hdr->replen += decode_savefh_maxsz;
1673 }
1674
1675 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1676 {
1677         __be32 *p;
1678
1679         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1680         *p++ = cpu_to_be32(OP_SETATTR);
1681         xdr_encode_opaque_fixed(p, arg->stateid.data, NFS4_STATEID_SIZE);
1682         hdr->nops++;
1683         hdr->replen += decode_setattr_maxsz;
1684         encode_attrs(xdr, arg->iap, server);
1685 }
1686
1687 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1688 {
1689         __be32 *p;
1690
1691         p = reserve_space(xdr, 4 + NFS4_VERIFIER_SIZE);
1692         *p++ = cpu_to_be32(OP_SETCLIENTID);
1693         xdr_encode_opaque_fixed(p, setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
1694
1695         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1696         p = reserve_space(xdr, 4);
1697         *p = cpu_to_be32(setclientid->sc_prog);
1698         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1699         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1700         p = reserve_space(xdr, 4);
1701         *p = cpu_to_be32(setclientid->sc_cb_ident);
1702         hdr->nops++;
1703         hdr->replen += decode_setclientid_maxsz;
1704 }
1705
1706 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1707 {
1708         __be32 *p;
1709
1710         p = reserve_space(xdr, 12 + NFS4_VERIFIER_SIZE);
1711         *p++ = cpu_to_be32(OP_SETCLIENTID_CONFIRM);
1712         p = xdr_encode_hyper(p, arg->clientid);
1713         xdr_encode_opaque_fixed(p, arg->confirm.data, NFS4_VERIFIER_SIZE);
1714         hdr->nops++;
1715         hdr->replen += decode_setclientid_confirm_maxsz;
1716 }
1717
1718 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1719 {
1720         __be32 *p;
1721
1722         p = reserve_space(xdr, 4);
1723         *p = cpu_to_be32(OP_WRITE);
1724
1725         encode_stateid(xdr, args->context, args->lock_context,
1726                        hdr->minorversion);
1727
1728         p = reserve_space(xdr, 16);
1729         p = xdr_encode_hyper(p, args->offset);
1730         *p++ = cpu_to_be32(args->stable);
1731         *p = cpu_to_be32(args->count);
1732
1733         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1734         hdr->nops++;
1735         hdr->replen += decode_write_maxsz;
1736 }
1737
1738 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1739 {
1740         __be32 *p;
1741
1742         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1743
1744         *p++ = cpu_to_be32(OP_DELEGRETURN);
1745         xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1746         hdr->nops++;
1747         hdr->replen += decode_delegreturn_maxsz;
1748 }
1749
1750 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1751 {
1752         int len = name->len;
1753         __be32 *p;
1754
1755         p = reserve_space(xdr, 8 + len);
1756         *p++ = cpu_to_be32(OP_SECINFO);
1757         xdr_encode_opaque(p, name->name, len);
1758         hdr->nops++;
1759         hdr->replen += decode_secinfo_maxsz;
1760 }
1761
1762 #if defined(CONFIG_NFS_V4_1)
1763 /* NFSv4.1 operations */
1764 static void encode_exchange_id(struct xdr_stream *xdr,
1765                                struct nfs41_exchange_id_args *args,
1766                                struct compound_hdr *hdr)
1767 {
1768         __be32 *p;
1769
1770         p = reserve_space(xdr, 4 + sizeof(args->verifier->data));
1771         *p++ = cpu_to_be32(OP_EXCHANGE_ID);
1772         xdr_encode_opaque_fixed(p, args->verifier->data, sizeof(args->verifier->data));
1773
1774         encode_string(xdr, args->id_len, args->id);
1775
1776         p = reserve_space(xdr, 12);
1777         *p++ = cpu_to_be32(args->flags);
1778         *p++ = cpu_to_be32(0);  /* zero length state_protect4_a */
1779         *p = cpu_to_be32(0);    /* zero length implementation id array */
1780         hdr->nops++;
1781         hdr->replen += decode_exchange_id_maxsz;
1782 }
1783
1784 static void encode_create_session(struct xdr_stream *xdr,
1785                                   struct nfs41_create_session_args *args,
1786                                   struct compound_hdr *hdr)
1787 {
1788         __be32 *p;
1789         char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1790         uint32_t len;
1791         struct nfs_client *clp = args->client;
1792         u32 max_resp_sz_cached;
1793
1794         /*
1795          * Assumes OPEN is the biggest non-idempotent compound.
1796          * 2 is the verifier.
1797          */
1798         max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1799                               RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1800
1801         len = scnprintf(machine_name, sizeof(machine_name), "%s",
1802                         clp->cl_ipaddr);
1803
1804         p = reserve_space(xdr, 20 + 2*28 + 20 + len + 12);
1805         *p++ = cpu_to_be32(OP_CREATE_SESSION);
1806         p = xdr_encode_hyper(p, clp->cl_clientid);
1807         *p++ = cpu_to_be32(clp->cl_seqid);                      /*Sequence id */
1808         *p++ = cpu_to_be32(args->flags);                        /*flags */
1809
1810         /* Fore Channel */
1811         *p++ = cpu_to_be32(0);                          /* header padding size */
1812         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1813         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1814         *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1815         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1816         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1817         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1818
1819         /* Back Channel */
1820         *p++ = cpu_to_be32(0);                          /* header padding size */
1821         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1822         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1823         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1824         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1825         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1826         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1827
1828         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1829         *p++ = cpu_to_be32(1);
1830         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1831
1832         /* authsys_parms rfc1831 */
1833         *p++ = cpu_to_be32((u32)clp->cl_boot_time.tv_nsec);     /* stamp */
1834         p = xdr_encode_opaque(p, machine_name, len);
1835         *p++ = cpu_to_be32(0);                          /* UID */
1836         *p++ = cpu_to_be32(0);                          /* GID */
1837         *p = cpu_to_be32(0);                            /* No more gids */
1838         hdr->nops++;
1839         hdr->replen += decode_create_session_maxsz;
1840 }
1841
1842 static void encode_destroy_session(struct xdr_stream *xdr,
1843                                    struct nfs4_session *session,
1844                                    struct compound_hdr *hdr)
1845 {
1846         __be32 *p;
1847         p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN);
1848         *p++ = cpu_to_be32(OP_DESTROY_SESSION);
1849         xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1850         hdr->nops++;
1851         hdr->replen += decode_destroy_session_maxsz;
1852 }
1853
1854 static void encode_reclaim_complete(struct xdr_stream *xdr,
1855                                     struct nfs41_reclaim_complete_args *args,
1856                                     struct compound_hdr *hdr)
1857 {
1858         __be32 *p;
1859
1860         p = reserve_space(xdr, 8);
1861         *p++ = cpu_to_be32(OP_RECLAIM_COMPLETE);
1862         *p++ = cpu_to_be32(args->one_fs);
1863         hdr->nops++;
1864         hdr->replen += decode_reclaim_complete_maxsz;
1865 }
1866 #endif /* CONFIG_NFS_V4_1 */
1867
1868 static void encode_sequence(struct xdr_stream *xdr,
1869                             const struct nfs4_sequence_args *args,
1870                             struct compound_hdr *hdr)
1871 {
1872 #if defined(CONFIG_NFS_V4_1)
1873         struct nfs4_session *session = args->sa_session;
1874         struct nfs4_slot_table *tp;
1875         struct nfs4_slot *slot;
1876         __be32 *p;
1877
1878         if (!session)
1879                 return;
1880
1881         tp = &session->fc_slot_table;
1882
1883         WARN_ON(args->sa_slotid == NFS4_MAX_SLOT_TABLE);
1884         slot = tp->slots + args->sa_slotid;
1885
1886         p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN + 16);
1887         *p++ = cpu_to_be32(OP_SEQUENCE);
1888
1889         /*
1890          * Sessionid + seqid + slotid + max slotid + cache_this
1891          */
1892         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1893                 "max_slotid=%d cache_this=%d\n",
1894                 __func__,
1895                 ((u32 *)session->sess_id.data)[0],
1896                 ((u32 *)session->sess_id.data)[1],
1897                 ((u32 *)session->sess_id.data)[2],
1898                 ((u32 *)session->sess_id.data)[3],
1899                 slot->seq_nr, args->sa_slotid,
1900                 tp->highest_used_slotid, args->sa_cache_this);
1901         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1902         *p++ = cpu_to_be32(slot->seq_nr);
1903         *p++ = cpu_to_be32(args->sa_slotid);
1904         *p++ = cpu_to_be32(tp->highest_used_slotid);
1905         *p = cpu_to_be32(args->sa_cache_this);
1906         hdr->nops++;
1907         hdr->replen += decode_sequence_maxsz;
1908 #endif /* CONFIG_NFS_V4_1 */
1909 }
1910
1911 #ifdef CONFIG_NFS_V4_1
1912 static void
1913 encode_getdevicelist(struct xdr_stream *xdr,
1914                      const struct nfs4_getdevicelist_args *args,
1915                      struct compound_hdr *hdr)
1916 {
1917         __be32 *p;
1918         nfs4_verifier dummy = {
1919                 .data = "dummmmmy",
1920         };
1921
1922         p = reserve_space(xdr, 20);
1923         *p++ = cpu_to_be32(OP_GETDEVICELIST);
1924         *p++ = cpu_to_be32(args->layoutclass);
1925         *p++ = cpu_to_be32(NFS4_PNFS_GETDEVLIST_MAXNUM);
1926         xdr_encode_hyper(p, 0ULL);                          /* cookie */
1927         encode_nfs4_verifier(xdr, &dummy);
1928         hdr->nops++;
1929         hdr->replen += decode_getdevicelist_maxsz;
1930 }
1931
1932 static void
1933 encode_getdeviceinfo(struct xdr_stream *xdr,
1934                      const struct nfs4_getdeviceinfo_args *args,
1935                      struct compound_hdr *hdr)
1936 {
1937         __be32 *p;
1938
1939         p = reserve_space(xdr, 16 + NFS4_DEVICEID4_SIZE);
1940         *p++ = cpu_to_be32(OP_GETDEVICEINFO);
1941         p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1942                                     NFS4_DEVICEID4_SIZE);
1943         *p++ = cpu_to_be32(args->pdev->layout_type);
1944         *p++ = cpu_to_be32(args->pdev->pglen);          /* gdia_maxcount */
1945         *p++ = cpu_to_be32(0);                          /* bitmap length 0 */
1946         hdr->nops++;
1947         hdr->replen += decode_getdeviceinfo_maxsz;
1948 }
1949
1950 static void
1951 encode_layoutget(struct xdr_stream *xdr,
1952                       const struct nfs4_layoutget_args *args,
1953                       struct compound_hdr *hdr)
1954 {
1955         __be32 *p;
1956
1957         p = reserve_space(xdr, 44 + NFS4_STATEID_SIZE);
1958         *p++ = cpu_to_be32(OP_LAYOUTGET);
1959         *p++ = cpu_to_be32(0);     /* Signal layout available */
1960         *p++ = cpu_to_be32(args->type);
1961         *p++ = cpu_to_be32(args->range.iomode);
1962         p = xdr_encode_hyper(p, args->range.offset);
1963         p = xdr_encode_hyper(p, args->range.length);
1964         p = xdr_encode_hyper(p, args->minlength);
1965         p = xdr_encode_opaque_fixed(p, &args->stateid.data, NFS4_STATEID_SIZE);
1966         *p = cpu_to_be32(args->maxcount);
1967
1968         dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1969                 __func__,
1970                 args->type,
1971                 args->range.iomode,
1972                 (unsigned long)args->range.offset,
1973                 (unsigned long)args->range.length,
1974                 args->maxcount);
1975         hdr->nops++;
1976         hdr->replen += decode_layoutget_maxsz;
1977 }
1978
1979 static int
1980 encode_layoutcommit(struct xdr_stream *xdr,
1981                     struct inode *inode,
1982                     const struct nfs4_layoutcommit_args *args,
1983                     struct compound_hdr *hdr)
1984 {
1985         __be32 *p;
1986
1987         dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1988                 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1989
1990         p = reserve_space(xdr, 44 + NFS4_STATEID_SIZE);
1991         *p++ = cpu_to_be32(OP_LAYOUTCOMMIT);
1992         /* Only whole file layouts */
1993         p = xdr_encode_hyper(p, 0); /* offset */
1994         p = xdr_encode_hyper(p, args->lastbytewritten + 1);     /* length */
1995         *p++ = cpu_to_be32(0); /* reclaim */
1996         p = xdr_encode_opaque_fixed(p, args->stateid.data, NFS4_STATEID_SIZE);
1997         *p++ = cpu_to_be32(1); /* newoffset = TRUE */
1998         p = xdr_encode_hyper(p, args->lastbytewritten);
1999         *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
2000         *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
2001
2002         if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit)
2003                 NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
2004                         NFS_I(inode)->layout, xdr, args);
2005         else {
2006                 p = reserve_space(xdr, 4);
2007                 *p = cpu_to_be32(0); /* no layout-type payload */
2008         }
2009
2010         hdr->nops++;
2011         hdr->replen += decode_layoutcommit_maxsz;
2012         return 0;
2013 }
2014
2015 static void
2016 encode_layoutreturn(struct xdr_stream *xdr,
2017                     const struct nfs4_layoutreturn_args *args,
2018                     struct compound_hdr *hdr)
2019 {
2020         __be32 *p;
2021
2022         p = reserve_space(xdr, 20);
2023         *p++ = cpu_to_be32(OP_LAYOUTRETURN);
2024         *p++ = cpu_to_be32(0);          /* reclaim. always 0 for now */
2025         *p++ = cpu_to_be32(args->layout_type);
2026         *p++ = cpu_to_be32(IOMODE_ANY);
2027         *p = cpu_to_be32(RETURN_FILE);
2028         p = reserve_space(xdr, 16 + NFS4_STATEID_SIZE);
2029         p = xdr_encode_hyper(p, 0);
2030         p = xdr_encode_hyper(p, NFS4_MAX_UINT64);
2031         spin_lock(&args->inode->i_lock);
2032         xdr_encode_opaque_fixed(p, &args->stateid.data, NFS4_STATEID_SIZE);
2033         spin_unlock(&args->inode->i_lock);
2034         if (NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn) {
2035                 NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn(
2036                         NFS_I(args->inode)->layout, xdr, args);
2037         } else {
2038                 p = reserve_space(xdr, 4);
2039                 *p = cpu_to_be32(0);
2040         }
2041         hdr->nops++;
2042         hdr->replen += decode_layoutreturn_maxsz;
2043 }
2044
2045 static int
2046 encode_secinfo_no_name(struct xdr_stream *xdr,
2047                        const struct nfs41_secinfo_no_name_args *args,
2048                        struct compound_hdr *hdr)
2049 {
2050         __be32 *p;
2051         p = reserve_space(xdr, 8);
2052         *p++ = cpu_to_be32(OP_SECINFO_NO_NAME);
2053         *p++ = cpu_to_be32(args->style);
2054         hdr->nops++;
2055         hdr->replen += decode_secinfo_no_name_maxsz;
2056         return 0;
2057 }
2058
2059 static void encode_test_stateid(struct xdr_stream *xdr,
2060                                 struct nfs41_test_stateid_args *args,
2061                                 struct compound_hdr *hdr)
2062 {
2063         __be32 *p;
2064
2065         p = reserve_space(xdr, 8 + NFS4_STATEID_SIZE);
2066         *p++ = cpu_to_be32(OP_TEST_STATEID);
2067         *p++ = cpu_to_be32(1);
2068         xdr_encode_opaque_fixed(p, args->stateid->data, NFS4_STATEID_SIZE);
2069         hdr->nops++;
2070         hdr->replen += decode_test_stateid_maxsz;
2071 }
2072
2073 static void encode_free_stateid(struct xdr_stream *xdr,
2074                                 struct nfs41_free_stateid_args *args,
2075                                 struct compound_hdr *hdr)
2076 {
2077         __be32 *p;
2078         p = reserve_space(xdr, 4 + NFS4_STATEID_SIZE);
2079         *p++ = cpu_to_be32(OP_FREE_STATEID);
2080         xdr_encode_opaque_fixed(p, args->stateid->data, NFS4_STATEID_SIZE);
2081         hdr->nops++;
2082         hdr->replen += decode_free_stateid_maxsz;
2083 }
2084 #endif /* CONFIG_NFS_V4_1 */
2085
2086 /*
2087  * END OF "GENERIC" ENCODE ROUTINES.
2088  */
2089
2090 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2091 {
2092 #if defined(CONFIG_NFS_V4_1)
2093         if (args->sa_session)
2094                 return args->sa_session->clp->cl_mvops->minor_version;
2095 #endif /* CONFIG_NFS_V4_1 */
2096         return 0;
2097 }
2098
2099 /*
2100  * Encode an ACCESS request
2101  */
2102 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2103                                 const struct nfs4_accessargs *args)
2104 {
2105         struct compound_hdr hdr = {
2106                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2107         };
2108
2109         encode_compound_hdr(xdr, req, &hdr);
2110         encode_sequence(xdr, &args->seq_args, &hdr);
2111         encode_putfh(xdr, args->fh, &hdr);
2112         encode_access(xdr, args->access, &hdr);
2113         encode_getfattr(xdr, args->bitmask, &hdr);
2114         encode_nops(&hdr);
2115 }
2116
2117 /*
2118  * Encode LOOKUP request
2119  */
2120 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2121                                 const struct nfs4_lookup_arg *args)
2122 {
2123         struct compound_hdr hdr = {
2124                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2125         };
2126
2127         encode_compound_hdr(xdr, req, &hdr);
2128         encode_sequence(xdr, &args->seq_args, &hdr);
2129         encode_putfh(xdr, args->dir_fh, &hdr);
2130         encode_lookup(xdr, args->name, &hdr);
2131         encode_getfh(xdr, &hdr);
2132         encode_getfattr(xdr, args->bitmask, &hdr);
2133         encode_nops(&hdr);
2134 }
2135
2136 /*
2137  * Encode LOOKUP_ROOT request
2138  */
2139 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2140                                      struct xdr_stream *xdr,
2141                                      const struct nfs4_lookup_root_arg *args)
2142 {
2143         struct compound_hdr hdr = {
2144                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2145         };
2146
2147         encode_compound_hdr(xdr, req, &hdr);
2148         encode_sequence(xdr, &args->seq_args, &hdr);
2149         encode_putrootfh(xdr, &hdr);
2150         encode_getfh(xdr, &hdr);
2151         encode_getfattr(xdr, args->bitmask, &hdr);
2152         encode_nops(&hdr);
2153 }
2154
2155 /*
2156  * Encode REMOVE request
2157  */
2158 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2159                                 const struct nfs_removeargs *args)
2160 {
2161         struct compound_hdr hdr = {
2162                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2163         };
2164
2165         encode_compound_hdr(xdr, req, &hdr);
2166         encode_sequence(xdr, &args->seq_args, &hdr);
2167         encode_putfh(xdr, args->fh, &hdr);
2168         encode_remove(xdr, &args->name, &hdr);
2169         encode_getfattr(xdr, args->bitmask, &hdr);
2170         encode_nops(&hdr);
2171 }
2172
2173 /*
2174  * Encode RENAME request
2175  */
2176 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2177                                 const struct nfs_renameargs *args)
2178 {
2179         struct compound_hdr hdr = {
2180                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2181         };
2182
2183         encode_compound_hdr(xdr, req, &hdr);
2184         encode_sequence(xdr, &args->seq_args, &hdr);
2185         encode_putfh(xdr, args->old_dir, &hdr);
2186         encode_savefh(xdr, &hdr);
2187         encode_putfh(xdr, args->new_dir, &hdr);
2188         encode_rename(xdr, args->old_name, args->new_name, &hdr);
2189         encode_getfattr(xdr, args->bitmask, &hdr);
2190         encode_restorefh(xdr, &hdr);
2191         encode_getfattr(xdr, args->bitmask, &hdr);
2192         encode_nops(&hdr);
2193 }
2194
2195 /*
2196  * Encode LINK request
2197  */
2198 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2199                              const struct nfs4_link_arg *args)
2200 {
2201         struct compound_hdr hdr = {
2202                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2203         };
2204
2205         encode_compound_hdr(xdr, req, &hdr);
2206         encode_sequence(xdr, &args->seq_args, &hdr);
2207         encode_putfh(xdr, args->fh, &hdr);
2208         encode_savefh(xdr, &hdr);
2209         encode_putfh(xdr, args->dir_fh, &hdr);
2210         encode_link(xdr, args->name, &hdr);
2211         encode_getfattr(xdr, args->bitmask, &hdr);
2212         encode_restorefh(xdr, &hdr);
2213         encode_getfattr(xdr, args->bitmask, &hdr);
2214         encode_nops(&hdr);
2215 }
2216
2217 /*
2218  * Encode CREATE request
2219  */
2220 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2221                                 const struct nfs4_create_arg *args)
2222 {
2223         struct compound_hdr hdr = {
2224                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2225         };
2226
2227         encode_compound_hdr(xdr, req, &hdr);
2228         encode_sequence(xdr, &args->seq_args, &hdr);
2229         encode_putfh(xdr, args->dir_fh, &hdr);
2230         encode_savefh(xdr, &hdr);
2231         encode_create(xdr, args, &hdr);
2232         encode_getfh(xdr, &hdr);
2233         encode_getfattr(xdr, args->bitmask, &hdr);
2234         encode_restorefh(xdr, &hdr);
2235         encode_getfattr(xdr, args->bitmask, &hdr);
2236         encode_nops(&hdr);
2237 }
2238
2239 /*
2240  * Encode SYMLINK request
2241  */
2242 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2243                                  const struct nfs4_create_arg *args)
2244 {
2245         nfs4_xdr_enc_create(req, xdr, args);
2246 }
2247
2248 /*
2249  * Encode GETATTR request
2250  */
2251 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2252                                  const struct nfs4_getattr_arg *args)
2253 {
2254         struct compound_hdr hdr = {
2255                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2256         };
2257
2258         encode_compound_hdr(xdr, req, &hdr);
2259         encode_sequence(xdr, &args->seq_args, &hdr);
2260         encode_putfh(xdr, args->fh, &hdr);
2261         encode_getfattr(xdr, args->bitmask, &hdr);
2262         encode_nops(&hdr);
2263 }
2264
2265 /*
2266  * Encode a CLOSE request
2267  */
2268 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2269                                struct nfs_closeargs *args)
2270 {
2271         struct compound_hdr hdr = {
2272                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2273         };
2274
2275         encode_compound_hdr(xdr, req, &hdr);
2276         encode_sequence(xdr, &args->seq_args, &hdr);
2277         encode_putfh(xdr, args->fh, &hdr);
2278         encode_close(xdr, args, &hdr);
2279         encode_getfattr(xdr, args->bitmask, &hdr);
2280         encode_nops(&hdr);
2281 }
2282
2283 /*
2284  * Encode an OPEN request
2285  */
2286 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2287                               struct nfs_openargs *args)
2288 {
2289         struct compound_hdr hdr = {
2290                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2291         };
2292
2293         encode_compound_hdr(xdr, req, &hdr);
2294         encode_sequence(xdr, &args->seq_args, &hdr);
2295         encode_putfh(xdr, args->fh, &hdr);
2296         encode_savefh(xdr, &hdr);
2297         encode_open(xdr, args, &hdr);
2298         encode_getfh(xdr, &hdr);
2299         encode_getfattr(xdr, args->bitmask, &hdr);
2300         encode_restorefh(xdr, &hdr);
2301         encode_getfattr(xdr, args->dir_bitmask, &hdr);
2302         encode_nops(&hdr);
2303 }
2304
2305 /*
2306  * Encode an OPEN_CONFIRM request
2307  */
2308 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2309                                       struct xdr_stream *xdr,
2310                                       struct nfs_open_confirmargs *args)
2311 {
2312         struct compound_hdr hdr = {
2313                 .nops   = 0,
2314         };
2315
2316         encode_compound_hdr(xdr, req, &hdr);
2317         encode_putfh(xdr, args->fh, &hdr);
2318         encode_open_confirm(xdr, args, &hdr);
2319         encode_nops(&hdr);
2320 }
2321
2322 /*
2323  * Encode an OPEN request with no attributes.
2324  */
2325 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2326                                      struct xdr_stream *xdr,
2327                                      struct nfs_openargs *args)
2328 {
2329         struct compound_hdr hdr = {
2330                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2331         };
2332
2333         encode_compound_hdr(xdr, req, &hdr);
2334         encode_sequence(xdr, &args->seq_args, &hdr);
2335         encode_putfh(xdr, args->fh, &hdr);
2336         encode_open(xdr, args, &hdr);
2337         encode_getfattr(xdr, args->bitmask, &hdr);
2338         encode_nops(&hdr);
2339 }
2340
2341 /*
2342  * Encode an OPEN_DOWNGRADE request
2343  */
2344 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2345                                         struct xdr_stream *xdr,
2346                                         struct nfs_closeargs *args)
2347 {
2348         struct compound_hdr hdr = {
2349                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2350         };
2351
2352         encode_compound_hdr(xdr, req, &hdr);
2353         encode_sequence(xdr, &args->seq_args, &hdr);
2354         encode_putfh(xdr, args->fh, &hdr);
2355         encode_open_downgrade(xdr, args, &hdr);
2356         encode_getfattr(xdr, args->bitmask, &hdr);
2357         encode_nops(&hdr);
2358 }
2359
2360 /*
2361  * Encode a LOCK request
2362  */
2363 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2364                               struct nfs_lock_args *args)
2365 {
2366         struct compound_hdr hdr = {
2367                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2368         };
2369
2370         encode_compound_hdr(xdr, req, &hdr);
2371         encode_sequence(xdr, &args->seq_args, &hdr);
2372         encode_putfh(xdr, args->fh, &hdr);
2373         encode_lock(xdr, args, &hdr);
2374         encode_nops(&hdr);
2375 }
2376
2377 /*
2378  * Encode a LOCKT request
2379  */
2380 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2381                                struct nfs_lockt_args *args)
2382 {
2383         struct compound_hdr hdr = {
2384                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2385         };
2386
2387         encode_compound_hdr(xdr, req, &hdr);
2388         encode_sequence(xdr, &args->seq_args, &hdr);
2389         encode_putfh(xdr, args->fh, &hdr);
2390         encode_lockt(xdr, args, &hdr);
2391         encode_nops(&hdr);
2392 }
2393
2394 /*
2395  * Encode a LOCKU request
2396  */
2397 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2398                                struct nfs_locku_args *args)
2399 {
2400         struct compound_hdr hdr = {
2401                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2402         };
2403
2404         encode_compound_hdr(xdr, req, &hdr);
2405         encode_sequence(xdr, &args->seq_args, &hdr);
2406         encode_putfh(xdr, args->fh, &hdr);
2407         encode_locku(xdr, args, &hdr);
2408         encode_nops(&hdr);
2409 }
2410
2411 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2412                                            struct xdr_stream *xdr,
2413                                         struct nfs_release_lockowner_args *args)
2414 {
2415         struct compound_hdr hdr = {
2416                 .minorversion = 0,
2417         };
2418
2419         encode_compound_hdr(xdr, req, &hdr);
2420         encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2421         encode_nops(&hdr);
2422 }
2423
2424 /*
2425  * Encode a READLINK request
2426  */
2427 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2428                                   const struct nfs4_readlink *args)
2429 {
2430         struct compound_hdr hdr = {
2431                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2432         };
2433
2434         encode_compound_hdr(xdr, req, &hdr);
2435         encode_sequence(xdr, &args->seq_args, &hdr);
2436         encode_putfh(xdr, args->fh, &hdr);
2437         encode_readlink(xdr, args, req, &hdr);
2438
2439         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2440                         args->pgbase, args->pglen);
2441         encode_nops(&hdr);
2442 }
2443
2444 /*
2445  * Encode a READDIR request
2446  */
2447 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2448                                  const struct nfs4_readdir_arg *args)
2449 {
2450         struct compound_hdr hdr = {
2451                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2452         };
2453
2454         encode_compound_hdr(xdr, req, &hdr);
2455         encode_sequence(xdr, &args->seq_args, &hdr);
2456         encode_putfh(xdr, args->fh, &hdr);
2457         encode_readdir(xdr, args, req, &hdr);
2458
2459         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2460                          args->pgbase, args->count);
2461         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2462                         __func__, hdr.replen << 2, args->pages,
2463                         args->pgbase, args->count);
2464         encode_nops(&hdr);
2465 }
2466
2467 /*
2468  * Encode a READ request
2469  */
2470 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2471                               struct nfs_readargs *args)
2472 {
2473         struct compound_hdr hdr = {
2474                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2475         };
2476
2477         encode_compound_hdr(xdr, req, &hdr);
2478         encode_sequence(xdr, &args->seq_args, &hdr);
2479         encode_putfh(xdr, args->fh, &hdr);
2480         encode_read(xdr, args, &hdr);
2481
2482         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2483                          args->pages, args->pgbase, args->count);
2484         req->rq_rcv_buf.flags |= XDRBUF_READ;
2485         encode_nops(&hdr);
2486 }
2487
2488 /*
2489  * Encode an SETATTR request
2490  */
2491 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2492                                  struct nfs_setattrargs *args)
2493 {
2494         struct compound_hdr hdr = {
2495                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2496         };
2497
2498         encode_compound_hdr(xdr, req, &hdr);
2499         encode_sequence(xdr, &args->seq_args, &hdr);
2500         encode_putfh(xdr, args->fh, &hdr);
2501         encode_setattr(xdr, args, args->server, &hdr);
2502         encode_getfattr(xdr, args->bitmask, &hdr);
2503         encode_nops(&hdr);
2504 }
2505
2506 /*
2507  * Encode a GETACL request
2508  */
2509 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2510                                 struct nfs_getaclargs *args)
2511 {
2512         struct compound_hdr hdr = {
2513                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2514         };
2515         uint32_t replen;
2516
2517         encode_compound_hdr(xdr, req, &hdr);
2518         encode_sequence(xdr, &args->seq_args, &hdr);
2519         encode_putfh(xdr, args->fh, &hdr);
2520         replen = hdr.replen + op_decode_hdr_maxsz + 1;
2521         encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2522
2523         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2524                 args->acl_pages, args->acl_pgbase, args->acl_len);
2525         xdr_set_scratch_buffer(xdr, page_address(args->acl_scratch), PAGE_SIZE);
2526
2527         encode_nops(&hdr);
2528 }
2529
2530 /*
2531  * Encode a WRITE request
2532  */
2533 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2534                                struct nfs_writeargs *args)
2535 {
2536         struct compound_hdr hdr = {
2537                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2538         };
2539
2540         encode_compound_hdr(xdr, req, &hdr);
2541         encode_sequence(xdr, &args->seq_args, &hdr);
2542         encode_putfh(xdr, args->fh, &hdr);
2543         encode_write(xdr, args, &hdr);
2544         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2545         if (args->bitmask)
2546                 encode_getfattr(xdr, args->bitmask, &hdr);
2547         encode_nops(&hdr);
2548 }
2549
2550 /*
2551  *  a COMMIT request
2552  */
2553 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2554                                 struct nfs_writeargs *args)
2555 {
2556         struct compound_hdr hdr = {
2557                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2558         };
2559
2560         encode_compound_hdr(xdr, req, &hdr);
2561         encode_sequence(xdr, &args->seq_args, &hdr);
2562         encode_putfh(xdr, args->fh, &hdr);
2563         encode_commit(xdr, args, &hdr);
2564         if (args->bitmask)
2565                 encode_getfattr(xdr, args->bitmask, &hdr);
2566         encode_nops(&hdr);
2567 }
2568
2569 /*
2570  * FSINFO request
2571  */
2572 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2573                                 struct nfs4_fsinfo_arg *args)
2574 {
2575         struct compound_hdr hdr = {
2576                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2577         };
2578
2579         encode_compound_hdr(xdr, req, &hdr);
2580         encode_sequence(xdr, &args->seq_args, &hdr);
2581         encode_putfh(xdr, args->fh, &hdr);
2582         encode_fsinfo(xdr, args->bitmask, &hdr);
2583         encode_nops(&hdr);
2584 }
2585
2586 /*
2587  * a PATHCONF request
2588  */
2589 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2590                                   const struct nfs4_pathconf_arg *args)
2591 {
2592         struct compound_hdr hdr = {
2593                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2594         };
2595
2596         encode_compound_hdr(xdr, req, &hdr);
2597         encode_sequence(xdr, &args->seq_args, &hdr);
2598         encode_putfh(xdr, args->fh, &hdr);
2599         encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2600                            &hdr);
2601         encode_nops(&hdr);
2602 }
2603
2604 /*
2605  * a STATFS request
2606  */
2607 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2608                                 const struct nfs4_statfs_arg *args)
2609 {
2610         struct compound_hdr hdr = {
2611                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2612         };
2613
2614         encode_compound_hdr(xdr, req, &hdr);
2615         encode_sequence(xdr, &args->seq_args, &hdr);
2616         encode_putfh(xdr, args->fh, &hdr);
2617         encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2618                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2619         encode_nops(&hdr);
2620 }
2621
2622 /*
2623  * GETATTR_BITMAP request
2624  */
2625 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2626                                      struct xdr_stream *xdr,
2627                                      struct nfs4_server_caps_arg *args)
2628 {
2629         struct compound_hdr hdr = {
2630                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2631         };
2632
2633         encode_compound_hdr(xdr, req, &hdr);
2634         encode_sequence(xdr, &args->seq_args, &hdr);
2635         encode_putfh(xdr, args->fhandle, &hdr);
2636         encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2637                            FATTR4_WORD0_LINK_SUPPORT|
2638                            FATTR4_WORD0_SYMLINK_SUPPORT|
2639                            FATTR4_WORD0_ACLSUPPORT, &hdr);
2640         encode_nops(&hdr);
2641 }
2642
2643 /*
2644  * a RENEW request
2645  */
2646 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2647                                struct nfs_client *clp)
2648 {
2649         struct compound_hdr hdr = {
2650                 .nops   = 0,
2651         };
2652
2653         encode_compound_hdr(xdr, req, &hdr);
2654         encode_renew(xdr, clp, &hdr);
2655         encode_nops(&hdr);
2656 }
2657
2658 /*
2659  * a SETCLIENTID request
2660  */
2661 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2662                                      struct xdr_stream *xdr,
2663                                      struct nfs4_setclientid *sc)
2664 {
2665         struct compound_hdr hdr = {
2666                 .nops   = 0,
2667         };
2668
2669         encode_compound_hdr(xdr, req, &hdr);
2670         encode_setclientid(xdr, sc, &hdr);
2671         encode_nops(&hdr);
2672 }
2673
2674 /*
2675  * a SETCLIENTID_CONFIRM request
2676  */
2677 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2678                                              struct xdr_stream *xdr,
2679                                              struct nfs4_setclientid_res *arg)
2680 {
2681         struct compound_hdr hdr = {
2682                 .nops   = 0,
2683         };
2684         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2685
2686         encode_compound_hdr(xdr, req, &hdr);
2687         encode_setclientid_confirm(xdr, arg, &hdr);
2688         encode_putrootfh(xdr, &hdr);
2689         encode_fsinfo(xdr, lease_bitmap, &hdr);
2690         encode_nops(&hdr);
2691 }
2692
2693 /*
2694  * DELEGRETURN request
2695  */
2696 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2697                                      struct xdr_stream *xdr,
2698                                      const struct nfs4_delegreturnargs *args)
2699 {
2700         struct compound_hdr hdr = {
2701                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2702         };
2703
2704         encode_compound_hdr(xdr, req, &hdr);
2705         encode_sequence(xdr, &args->seq_args, &hdr);
2706         encode_putfh(xdr, args->fhandle, &hdr);
2707         encode_delegreturn(xdr, args->stateid, &hdr);
2708         encode_getfattr(xdr, args->bitmask, &hdr);
2709         encode_nops(&hdr);
2710 }
2711
2712 /*
2713  * Encode FS_LOCATIONS request
2714  */
2715 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2716                                       struct xdr_stream *xdr,
2717                                       struct nfs4_fs_locations_arg *args)
2718 {
2719         struct compound_hdr hdr = {
2720                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2721         };
2722         uint32_t replen;
2723
2724         encode_compound_hdr(xdr, req, &hdr);
2725         encode_sequence(xdr, &args->seq_args, &hdr);
2726         encode_putfh(xdr, args->dir_fh, &hdr);
2727         encode_lookup(xdr, args->name, &hdr);
2728         replen = hdr.replen;    /* get the attribute into args->page */
2729         encode_fs_locations(xdr, args->bitmask, &hdr);
2730
2731         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2732                         0, PAGE_SIZE);
2733         encode_nops(&hdr);
2734 }
2735
2736 /*
2737  * Encode SECINFO request
2738  */
2739 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2740                                 struct xdr_stream *xdr,
2741                                 struct nfs4_secinfo_arg *args)
2742 {
2743         struct compound_hdr hdr = {
2744                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2745         };
2746
2747         encode_compound_hdr(xdr, req, &hdr);
2748         encode_sequence(xdr, &args->seq_args, &hdr);
2749         encode_putfh(xdr, args->dir_fh, &hdr);
2750         encode_secinfo(xdr, args->name, &hdr);
2751         encode_nops(&hdr);
2752 }
2753
2754 #if defined(CONFIG_NFS_V4_1)
2755 /*
2756  * EXCHANGE_ID request
2757  */
2758 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2759                                      struct xdr_stream *xdr,
2760                                      struct nfs41_exchange_id_args *args)
2761 {
2762         struct compound_hdr hdr = {
2763                 .minorversion = args->client->cl_mvops->minor_version,
2764         };
2765
2766         encode_compound_hdr(xdr, req, &hdr);
2767         encode_exchange_id(xdr, args, &hdr);
2768         encode_nops(&hdr);
2769 }
2770
2771 /*
2772  * a CREATE_SESSION request
2773  */
2774 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2775                                         struct xdr_stream *xdr,
2776                                         struct nfs41_create_session_args *args)
2777 {
2778         struct compound_hdr hdr = {
2779                 .minorversion = args->client->cl_mvops->minor_version,
2780         };
2781
2782         encode_compound_hdr(xdr, req, &hdr);
2783         encode_create_session(xdr, args, &hdr);
2784         encode_nops(&hdr);
2785 }
2786
2787 /*
2788  * a DESTROY_SESSION request
2789  */
2790 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2791                                          struct xdr_stream *xdr,
2792                                          struct nfs4_session *session)
2793 {
2794         struct compound_hdr hdr = {
2795                 .minorversion = session->clp->cl_mvops->minor_version,
2796         };
2797
2798         encode_compound_hdr(xdr, req, &hdr);
2799         encode_destroy_session(xdr, session, &hdr);
2800         encode_nops(&hdr);
2801 }
2802
2803 /*
2804  * a SEQUENCE request
2805  */
2806 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2807                                   struct nfs4_sequence_args *args)
2808 {
2809         struct compound_hdr hdr = {
2810                 .minorversion = nfs4_xdr_minorversion(args),
2811         };
2812
2813         encode_compound_hdr(xdr, req, &hdr);
2814         encode_sequence(xdr, args, &hdr);
2815         encode_nops(&hdr);
2816 }
2817
2818 /*
2819  * a GET_LEASE_TIME request
2820  */
2821 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2822                                         struct xdr_stream *xdr,
2823                                         struct nfs4_get_lease_time_args *args)
2824 {
2825         struct compound_hdr hdr = {
2826                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2827         };
2828         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2829
2830         encode_compound_hdr(xdr, req, &hdr);
2831         encode_sequence(xdr, &args->la_seq_args, &hdr);
2832         encode_putrootfh(xdr, &hdr);
2833         encode_fsinfo(xdr, lease_bitmap, &hdr);
2834         encode_nops(&hdr);
2835 }
2836
2837 /*
2838  * a RECLAIM_COMPLETE request
2839  */
2840 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2841                                           struct xdr_stream *xdr,
2842                                 struct nfs41_reclaim_complete_args *args)
2843 {
2844         struct compound_hdr hdr = {
2845                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2846         };
2847
2848         encode_compound_hdr(xdr, req, &hdr);
2849         encode_sequence(xdr, &args->seq_args, &hdr);
2850         encode_reclaim_complete(xdr, args, &hdr);
2851         encode_nops(&hdr);
2852 }
2853
2854 /*
2855  * Encode GETDEVICELIST request
2856  */
2857 static void nfs4_xdr_enc_getdevicelist(struct rpc_rqst *req,
2858                                        struct xdr_stream *xdr,
2859                                        struct nfs4_getdevicelist_args *args)
2860 {
2861         struct compound_hdr hdr = {
2862                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2863         };
2864
2865         encode_compound_hdr(xdr, req, &hdr);
2866         encode_sequence(xdr, &args->seq_args, &hdr);
2867         encode_putfh(xdr, args->fh, &hdr);
2868         encode_getdevicelist(xdr, args, &hdr);
2869         encode_nops(&hdr);
2870 }
2871
2872 /*
2873  * Encode GETDEVICEINFO request
2874  */
2875 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2876                                        struct xdr_stream *xdr,
2877                                        struct nfs4_getdeviceinfo_args *args)
2878 {
2879         struct compound_hdr hdr = {
2880                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2881         };
2882
2883         encode_compound_hdr(xdr, req, &hdr);
2884         encode_sequence(xdr, &args->seq_args, &hdr);
2885         encode_getdeviceinfo(xdr, args, &hdr);
2886
2887         /* set up reply kvec. Subtract notification bitmap max size (2)
2888          * so that notification bitmap is put in xdr_buf tail */
2889         xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2890                          args->pdev->pages, args->pdev->pgbase,
2891                          args->pdev->pglen);
2892
2893         encode_nops(&hdr);
2894 }
2895
2896 /*
2897  *  Encode LAYOUTGET request
2898  */
2899 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2900                                    struct xdr_stream *xdr,
2901                                    struct nfs4_layoutget_args *args)
2902 {
2903         struct compound_hdr hdr = {
2904                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2905         };
2906
2907         encode_compound_hdr(xdr, req, &hdr);
2908         encode_sequence(xdr, &args->seq_args, &hdr);
2909         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2910         encode_layoutget(xdr, args, &hdr);
2911
2912         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2913             args->layout.pages, 0, args->layout.pglen);
2914
2915         encode_nops(&hdr);
2916 }
2917
2918 /*
2919  *  Encode LAYOUTCOMMIT request
2920  */
2921 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2922                                       struct xdr_stream *xdr,
2923                                       struct nfs4_layoutcommit_args *args)
2924 {
2925         struct nfs4_layoutcommit_data *data =
2926                 container_of(args, struct nfs4_layoutcommit_data, args);
2927         struct compound_hdr hdr = {
2928                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2929         };
2930
2931         encode_compound_hdr(xdr, req, &hdr);
2932         encode_sequence(xdr, &args->seq_args, &hdr);
2933         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2934         encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2935         encode_getfattr(xdr, args->bitmask, &hdr);
2936         encode_nops(&hdr);
2937 }
2938
2939 /*
2940  * Encode LAYOUTRETURN request
2941  */
2942 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2943                                       struct xdr_stream *xdr,
2944                                       struct nfs4_layoutreturn_args *args)
2945 {
2946         struct compound_hdr hdr = {
2947                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2948         };
2949
2950         encode_compound_hdr(xdr, req, &hdr);
2951         encode_sequence(xdr, &args->seq_args, &hdr);
2952         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2953         encode_layoutreturn(xdr, args, &hdr);
2954         encode_nops(&hdr);
2955 }
2956
2957 /*
2958  * Encode SECINFO_NO_NAME request
2959  */
2960 static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
2961                                         struct xdr_stream *xdr,
2962                                         struct nfs41_secinfo_no_name_args *args)
2963 {
2964         struct compound_hdr hdr = {
2965                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2966         };
2967
2968         encode_compound_hdr(xdr, req, &hdr);
2969         encode_sequence(xdr, &args->seq_args, &hdr);
2970         encode_putrootfh(xdr, &hdr);
2971         encode_secinfo_no_name(xdr, args, &hdr);
2972         encode_nops(&hdr);
2973         return 0;
2974 }
2975
2976 /*
2977  *  Encode TEST_STATEID request
2978  */
2979 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
2980                                       struct xdr_stream *xdr,
2981                                       struct nfs41_test_stateid_args *args)
2982 {
2983         struct compound_hdr hdr = {
2984                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2985         };
2986
2987         encode_compound_hdr(xdr, req, &hdr);
2988         encode_sequence(xdr, &args->seq_args, &hdr);
2989         encode_test_stateid(xdr, args, &hdr);
2990         encode_nops(&hdr);
2991 }
2992
2993 /*
2994  *  Encode FREE_STATEID request
2995  */
2996 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
2997                                      struct xdr_stream *xdr,
2998                                      struct nfs41_free_stateid_args *args)
2999 {
3000         struct compound_hdr hdr = {
3001                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3002         };
3003
3004         encode_compound_hdr(xdr, req, &hdr);
3005         encode_sequence(xdr, &args->seq_args, &hdr);
3006         encode_free_stateid(xdr, args, &hdr);
3007         encode_nops(&hdr);
3008 }
3009 #endif /* CONFIG_NFS_V4_1 */
3010
3011 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
3012 {
3013         dprintk("nfs: %s: prematurely hit end of receive buffer. "
3014                 "Remaining buffer length is %tu words.\n",
3015                 func, xdr->end - xdr->p);
3016 }
3017
3018 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3019 {
3020         __be32 *p;
3021
3022         p = xdr_inline_decode(xdr, 4);
3023         if (unlikely(!p))
3024                 goto out_overflow;
3025         *len = be32_to_cpup(p);
3026         p = xdr_inline_decode(xdr, *len);
3027         if (unlikely(!p))
3028                 goto out_overflow;
3029         *string = (char *)p;
3030         return 0;
3031 out_overflow:
3032         print_overflow_msg(__func__, xdr);
3033         return -EIO;
3034 }
3035
3036 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3037 {
3038         __be32 *p;
3039
3040         p = xdr_inline_decode(xdr, 8);
3041         if (unlikely(!p))
3042                 goto out_overflow;
3043         hdr->status = be32_to_cpup(p++);
3044         hdr->taglen = be32_to_cpup(p);
3045
3046         p = xdr_inline_decode(xdr, hdr->taglen + 4);
3047         if (unlikely(!p))
3048                 goto out_overflow;
3049         hdr->tag = (char *)p;
3050         p += XDR_QUADLEN(hdr->taglen);
3051         hdr->nops = be32_to_cpup(p);
3052         if (unlikely(hdr->nops < 1))
3053                 return nfs4_stat_to_errno(hdr->status);
3054         return 0;
3055 out_overflow:
3056         print_overflow_msg(__func__, xdr);
3057         return -EIO;
3058 }
3059
3060 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3061 {
3062         __be32 *p;
3063         uint32_t opnum;
3064         int32_t nfserr;
3065
3066         p = xdr_inline_decode(xdr, 8);
3067         if (unlikely(!p))
3068                 goto out_overflow;
3069         opnum = be32_to_cpup(p++);
3070         if (opnum != expected) {
3071                 dprintk("nfs: Server returned operation"
3072                         " %d but we issued a request for %d\n",
3073                                 opnum, expected);
3074                 return -EIO;
3075         }
3076         nfserr = be32_to_cpup(p);
3077         if (nfserr != NFS_OK)
3078                 return nfs4_stat_to_errno(nfserr);
3079         return 0;
3080 out_overflow:
3081         print_overflow_msg(__func__, xdr);
3082         return -EIO;
3083 }
3084
3085 /* Dummy routine */
3086 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
3087 {
3088         __be32 *p;
3089         unsigned int strlen;
3090         char *str;
3091
3092         p = xdr_inline_decode(xdr, 12);
3093         if (likely(p))
3094                 return decode_opaque_inline(xdr, &strlen, &str);
3095         print_overflow_msg(__func__, xdr);
3096         return -EIO;
3097 }
3098
3099 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3100 {
3101         uint32_t bmlen;
3102         __be32 *p;
3103
3104         p = xdr_inline_decode(xdr, 4);
3105         if (unlikely(!p))
3106                 goto out_overflow;
3107         bmlen = be32_to_cpup(p);
3108
3109         bitmap[0] = bitmap[1] = bitmap[2] = 0;
3110         p = xdr_inline_decode(xdr, (bmlen << 2));
3111         if (unlikely(!p))
3112                 goto out_overflow;
3113         if (bmlen > 0) {
3114                 bitmap[0] = be32_to_cpup(p++);
3115                 if (bmlen > 1) {
3116                         bitmap[1] = be32_to_cpup(p++);
3117                         if (bmlen > 2)
3118                                 bitmap[2] = be32_to_cpup(p);
3119                 }
3120         }
3121         return 0;
3122 out_overflow:
3123         print_overflow_msg(__func__, xdr);
3124         return -EIO;
3125 }
3126
3127 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
3128 {
3129         __be32 *p;
3130
3131         p = xdr_inline_decode(xdr, 4);
3132         if (unlikely(!p))
3133                 goto out_overflow;
3134         *attrlen = be32_to_cpup(p);
3135         *savep = xdr->p;
3136         return 0;
3137 out_overflow:
3138         print_overflow_msg(__func__, xdr);
3139         return -EIO;
3140 }
3141
3142 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3143 {
3144         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3145                 int ret;
3146                 ret = decode_attr_bitmap(xdr, bitmask);
3147                 if (unlikely(ret < 0))
3148                         return ret;
3149                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3150         } else
3151                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3152         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3153                 bitmask[0], bitmask[1], bitmask[2]);
3154         return 0;
3155 }
3156
3157 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3158 {
3159         __be32 *p;
3160         int ret = 0;
3161
3162         *type = 0;
3163         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3164                 return -EIO;
3165         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3166                 p = xdr_inline_decode(xdr, 4);
3167                 if (unlikely(!p))
3168                         goto out_overflow;
3169                 *type = be32_to_cpup(p);
3170                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3171                         dprintk("%s: bad type %d\n", __func__, *type);
3172                         return -EIO;
3173                 }
3174                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3175                 ret = NFS_ATTR_FATTR_TYPE;
3176         }
3177         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3178         return ret;
3179 out_overflow:
3180         print_overflow_msg(__func__, xdr);
3181         return -EIO;
3182 }
3183
3184 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3185 {
3186         __be32 *p;
3187         int ret = 0;
3188
3189         *change = 0;
3190         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3191                 return -EIO;
3192         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3193                 p = xdr_inline_decode(xdr, 8);
3194                 if (unlikely(!p))
3195                         goto out_overflow;
3196                 xdr_decode_hyper(p, change);
3197                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3198                 ret = NFS_ATTR_FATTR_CHANGE;
3199         }
3200         dprintk("%s: change attribute=%Lu\n", __func__,
3201                         (unsigned long long)*change);
3202         return ret;
3203 out_overflow:
3204         print_overflow_msg(__func__, xdr);
3205         return -EIO;
3206 }
3207
3208 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3209 {
3210         __be32 *p;
3211         int ret = 0;
3212
3213         *size = 0;
3214         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3215                 return -EIO;
3216         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3217                 p = xdr_inline_decode(xdr, 8);
3218                 if (unlikely(!p))
3219                         goto out_overflow;
3220                 xdr_decode_hyper(p, size);
3221                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3222                 ret = NFS_ATTR_FATTR_SIZE;
3223         }
3224         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3225         return ret;
3226 out_overflow:
3227         print_overflow_msg(__func__, xdr);
3228         return -EIO;
3229 }
3230
3231 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3232 {
3233         __be32 *p;
3234
3235         *res = 0;
3236         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3237                 return -EIO;
3238         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3239                 p = xdr_inline_decode(xdr, 4);
3240                 if (unlikely(!p))
3241                         goto out_overflow;
3242                 *res = be32_to_cpup(p);
3243                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3244         }
3245         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3246         return 0;
3247 out_overflow:
3248         print_overflow_msg(__func__, xdr);
3249         return -EIO;
3250 }
3251
3252 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3253 {
3254         __be32 *p;
3255
3256         *res = 0;
3257         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3258                 return -EIO;
3259         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3260                 p = xdr_inline_decode(xdr, 4);
3261                 if (unlikely(!p))
3262                         goto out_overflow;
3263                 *res = be32_to_cpup(p);
3264                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3265         }
3266         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3267         return 0;
3268 out_overflow:
3269         print_overflow_msg(__func__, xdr);
3270         return -EIO;
3271 }
3272
3273 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3274 {
3275         __be32 *p;
3276         int ret = 0;
3277
3278         fsid->major = 0;
3279         fsid->minor = 0;
3280         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3281                 return -EIO;
3282         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3283                 p = xdr_inline_decode(xdr, 16);
3284                 if (unlikely(!p))
3285                         goto out_overflow;
3286                 p = xdr_decode_hyper(p, &fsid->major);
3287                 xdr_decode_hyper(p, &fsid->minor);
3288                 bitmap[0] &= ~FATTR4_WORD0_FSID;
3289                 ret = NFS_ATTR_FATTR_FSID;
3290         }
3291         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3292                         (unsigned long long)fsid->major,
3293                         (unsigned long long)fsid->minor);
3294         return ret;
3295 out_overflow:
3296         print_overflow_msg(__func__, xdr);
3297         return -EIO;
3298 }
3299
3300 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3301 {
3302         __be32 *p;
3303
3304         *res = 60;
3305         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3306                 return -EIO;
3307         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3308                 p = xdr_inline_decode(xdr, 4);
3309                 if (unlikely(!p))
3310                         goto out_overflow;
3311                 *res = be32_to_cpup(p);
3312                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3313         }
3314         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3315         return 0;
3316 out_overflow:
3317         print_overflow_msg(__func__, xdr);
3318         return -EIO;
3319 }
3320
3321 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3322 {
3323         __be32 *p;
3324
3325         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3326                 return -EIO;
3327         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3328                 p = xdr_inline_decode(xdr, 4);
3329                 if (unlikely(!p))
3330                         goto out_overflow;
3331                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3332                 *res = -be32_to_cpup(p);
3333         }
3334         return 0;
3335 out_overflow:
3336         print_overflow_msg(__func__, xdr);
3337         return -EIO;
3338 }
3339
3340 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3341 {
3342         __be32 *p;
3343         int len;
3344
3345         if (fh != NULL)
3346                 memset(fh, 0, sizeof(*fh));
3347
3348         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3349                 return -EIO;
3350         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3351                 p = xdr_inline_decode(xdr, 4);
3352                 if (unlikely(!p))
3353                         goto out_overflow;
3354                 len = be32_to_cpup(p);
3355                 if (len > NFS4_FHSIZE)
3356                         return -EIO;
3357                 p = xdr_inline_decode(xdr, len);
3358                 if (unlikely(!p))
3359                         goto out_overflow;
3360                 if (fh != NULL) {
3361                         memcpy(fh->data, p, len);
3362                         fh->size = len;
3363                 }
3364                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3365         }
3366         return 0;
3367 out_overflow:
3368         print_overflow_msg(__func__, xdr);
3369         return -EIO;
3370 }
3371
3372 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3373 {
3374         __be32 *p;
3375
3376         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
3377         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3378                 return -EIO;
3379         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3380                 p = xdr_inline_decode(xdr, 4);
3381                 if (unlikely(!p))
3382                         goto out_overflow;
3383                 *res = be32_to_cpup(p);
3384                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3385         }
3386         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3387         return 0;
3388 out_overflow:
3389         print_overflow_msg(__func__, xdr);
3390         return -EIO;
3391 }
3392
3393 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3394 {
3395         __be32 *p;
3396         int ret = 0;
3397
3398         *fileid = 0;
3399         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3400                 return -EIO;
3401         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3402                 p = xdr_inline_decode(xdr, 8);
3403                 if (unlikely(!p))
3404                         goto out_overflow;
3405                 xdr_decode_hyper(p, fileid);
3406                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3407                 ret = NFS_ATTR_FATTR_FILEID;
3408         }
3409         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3410         return ret;
3411 out_overflow:
3412         print_overflow_msg(__func__, xdr);
3413         return -EIO;
3414 }
3415
3416 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3417 {
3418         __be32 *p;
3419         int ret = 0;
3420
3421         *fileid = 0;
3422         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3423                 return -EIO;
3424         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3425                 p = xdr_inline_decode(xdr, 8);
3426                 if (unlikely(!p))
3427                         goto out_overflow;
3428                 xdr_decode_hyper(p, fileid);
3429                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3430                 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3431         }
3432         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3433         return ret;
3434 out_overflow:
3435         print_overflow_msg(__func__, xdr);
3436         return -EIO;
3437 }
3438
3439 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3440 {
3441         __be32 *p;
3442         int status = 0;
3443
3444         *res = 0;
3445         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3446                 return -EIO;
3447         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3448                 p = xdr_inline_decode(xdr, 8);
3449                 if (unlikely(!p))
3450                         goto out_overflow;
3451                 xdr_decode_hyper(p, res);
3452                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3453         }
3454         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3455         return status;
3456 out_overflow:
3457         print_overflow_msg(__func__, xdr);
3458         return -EIO;
3459 }
3460
3461 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3462 {
3463         __be32 *p;
3464         int status = 0;
3465
3466         *res = 0;
3467         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3468                 return -EIO;
3469         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3470                 p = xdr_inline_decode(xdr, 8);
3471                 if (unlikely(!p))
3472                         goto out_overflow;
3473                 xdr_decode_hyper(p, res);
3474                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3475         }
3476         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3477         return status;
3478 out_overflow:
3479         print_overflow_msg(__func__, xdr);
3480         return -EIO;
3481 }
3482
3483 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3484 {
3485         __be32 *p;
3486         int status = 0;
3487
3488         *res = 0;
3489         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3490                 return -EIO;
3491         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3492                 p = xdr_inline_decode(xdr, 8);
3493                 if (unlikely(!p))
3494                         goto out_overflow;
3495                 xdr_decode_hyper(p, res);
3496                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3497         }
3498         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3499         return status;
3500 out_overflow:
3501         print_overflow_msg(__func__, xdr);
3502         return -EIO;
3503 }
3504
3505 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3506 {
3507         u32 n;
3508         __be32 *p;
3509         int status = 0;
3510
3511         p = xdr_inline_decode(xdr, 4);
3512         if (unlikely(!p))
3513                 goto out_overflow;
3514         n = be32_to_cpup(p);
3515         if (n == 0)
3516                 goto root_path;
3517         dprintk("path ");
3518         path->ncomponents = 0;
3519         while (path->ncomponents < n) {
3520                 struct nfs4_string *component = &path->components[path->ncomponents];
3521                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3522                 if (unlikely(status != 0))
3523                         goto out_eio;
3524                 if (path->ncomponents != n)
3525                         dprintk("/");
3526                 dprintk("%s", component->data);
3527                 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
3528                         path->ncomponents++;
3529                 else {
3530                         dprintk("cannot parse %d components in path\n", n);
3531                         goto out_eio;
3532                 }
3533         }
3534 out:
3535         dprintk("\n");
3536         return status;
3537 root_path:
3538 /* a root pathname is sent as a zero component4 */
3539         path->ncomponents = 1;
3540         path->components[0].len=0;
3541         path->components[0].data=NULL;
3542         dprintk("path /\n");
3543         goto out;
3544 out_eio:
3545         dprintk(" status %d", status);
3546         status = -EIO;
3547         goto out;
3548 out_overflow:
3549         print_overflow_msg(__func__, xdr);
3550         return -EIO;
3551 }
3552
3553 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3554 {
3555         int n;
3556         __be32 *p;
3557         int status = -EIO;
3558
3559         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3560                 goto out;
3561         status = 0;
3562         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3563                 goto out;
3564         dprintk("%s: fsroot ", __func__);
3565         status = decode_pathname(xdr, &res->fs_path);
3566         if (unlikely(status != 0))
3567                 goto out;
3568         p = xdr_inline_decode(xdr, 4);
3569         if (unlikely(!p))
3570                 goto out_overflow;
3571         n = be32_to_cpup(p);
3572         if (n <= 0)
3573                 goto out_eio;
3574         res->nlocations = 0;
3575         while (res->nlocations < n) {
3576                 u32 m;
3577                 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
3578
3579                 p = xdr_inline_decode(xdr, 4);
3580                 if (unlikely(!p))
3581                         goto out_overflow;
3582                 m = be32_to_cpup(p);
3583
3584                 loc->nservers = 0;
3585                 dprintk("%s: servers ", __func__);
3586                 while (loc->nservers < m) {
3587                         struct nfs4_string *server = &loc->servers[loc->nservers];
3588                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3589                         if (unlikely(status != 0))
3590                                 goto out_eio;
3591                         dprintk("%s ", server->data);
3592                         if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
3593                                 loc->nservers++;
3594                         else {
3595                                 unsigned int i;
3596                                 dprintk("%s: using first %u of %u servers "
3597                                         "returned for location %u\n",
3598                                                 __func__,
3599                                                 NFS4_FS_LOCATION_MAXSERVERS,
3600                                                 m, res->nlocations);
3601                                 for (i = loc->nservers; i < m; i++) {
3602                                         unsigned int len;
3603                                         char *data;
3604                                         status = decode_opaque_inline(xdr, &len, &data);
3605                                         if (unlikely(status != 0))
3606                                                 goto out_eio;
3607                                 }
3608                         }
3609                 }
3610                 status = decode_pathname(xdr, &loc->rootpath);
3611                 if (unlikely(status != 0))
3612                         goto out_eio;
3613                 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
3614                         res->nlocations++;
3615         }
3616         if (res->nlocations != 0)
3617                 status = NFS_ATTR_FATTR_V4_REFERRAL;
3618 out:
3619         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3620         return status;
3621 out_overflow:
3622         print_overflow_msg(__func__, xdr);
3623 out_eio:
3624         status = -EIO;
3625         goto out;
3626 }
3627
3628 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3629 {
3630         __be32 *p;
3631         int status = 0;
3632
3633         *res = 0;
3634         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3635                 return -EIO;
3636         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3637                 p = xdr_inline_decode(xdr, 8);
3638                 if (unlikely(!p))
3639                         goto out_overflow;
3640                 xdr_decode_hyper(p, res);
3641                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3642         }
3643         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3644         return status;
3645 out_overflow:
3646         print_overflow_msg(__func__, xdr);
3647         return -EIO;
3648 }
3649
3650 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3651 {
3652         __be32 *p;
3653         int status = 0;
3654
3655         *maxlink = 1;
3656         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3657                 return -EIO;
3658         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3659                 p = xdr_inline_decode(xdr, 4);
3660                 if (unlikely(!p))
3661                         goto out_overflow;
3662                 *maxlink = be32_to_cpup(p);
3663                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3664         }
3665         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3666         return status;
3667 out_overflow:
3668         print_overflow_msg(__func__, xdr);
3669         return -EIO;
3670 }
3671
3672 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3673 {
3674         __be32 *p;
3675         int status = 0;
3676
3677         *maxname = 1024;
3678         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3679                 return -EIO;
3680         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3681                 p = xdr_inline_decode(xdr, 4);
3682                 if (unlikely(!p))
3683                         goto out_overflow;
3684                 *maxname = be32_to_cpup(p);
3685                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3686         }
3687         dprintk("%s: maxname=%u\n", __func__, *maxname);
3688         return status;
3689 out_overflow:
3690         print_overflow_msg(__func__, xdr);
3691         return -EIO;
3692 }
3693
3694 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3695 {
3696         __be32 *p;
3697         int status = 0;
3698
3699         *res = 1024;
3700         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3701                 return -EIO;
3702         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3703                 uint64_t maxread;
3704                 p = xdr_inline_decode(xdr, 8);
3705                 if (unlikely(!p))
3706                         goto out_overflow;
3707                 xdr_decode_hyper(p, &maxread);
3708                 if (maxread > 0x7FFFFFFF)
3709                         maxread = 0x7FFFFFFF;
3710                 *res = (uint32_t)maxread;
3711                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3712         }
3713         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3714         return status;
3715 out_overflow:
3716         print_overflow_msg(__func__, xdr);
3717         return -EIO;
3718 }
3719
3720 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3721 {
3722         __be32 *p;
3723         int status = 0;
3724
3725         *res = 1024;
3726         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3727                 return -EIO;
3728         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3729                 uint64_t maxwrite;
3730                 p = xdr_inline_decode(xdr, 8);
3731                 if (unlikely(!p))
3732                         goto out_overflow;
3733                 xdr_decode_hyper(p, &maxwrite);
3734                 if (maxwrite > 0x7FFFFFFF)
3735                         maxwrite = 0x7FFFFFFF;
3736                 *res = (uint32_t)maxwrite;
3737                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3738         }
3739         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3740         return status;
3741 out_overflow:
3742         print_overflow_msg(__func__, xdr);
3743         return -EIO;
3744 }
3745
3746 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3747 {
3748         uint32_t tmp;
3749         __be32 *p;
3750         int ret = 0;
3751
3752         *mode = 0;
3753         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3754                 return -EIO;
3755         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3756                 p = xdr_inline_decode(xdr, 4);
3757                 if (unlikely(!p))
3758                         goto out_overflow;
3759                 tmp = be32_to_cpup(p);
3760                 *mode = tmp & ~S_IFMT;
3761                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3762                 ret = NFS_ATTR_FATTR_MODE;
3763         }
3764         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3765         return ret;
3766 out_overflow:
3767         print_overflow_msg(__func__, xdr);
3768         return -EIO;
3769 }
3770
3771 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3772 {
3773         __be32 *p;
3774         int ret = 0;
3775
3776         *nlink = 1;
3777         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3778                 return -EIO;
3779         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3780                 p = xdr_inline_decode(xdr, 4);
3781                 if (unlikely(!p))
3782                         goto out_overflow;
3783                 *nlink = be32_to_cpup(p);
3784                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3785                 ret = NFS_ATTR_FATTR_NLINK;
3786         }
3787         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3788         return ret;
3789 out_overflow:
3790         print_overflow_msg(__func__, xdr);
3791         return -EIO;
3792 }
3793
3794 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3795                 const struct nfs_server *server, uint32_t *uid,
3796                 struct nfs4_string *owner_name)
3797 {
3798         uint32_t len;
3799         __be32 *p;
3800         int ret = 0;
3801
3802         *uid = -2;
3803         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3804                 return -EIO;
3805         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3806                 p = xdr_inline_decode(xdr, 4);
3807                 if (unlikely(!p))
3808                         goto out_overflow;
3809                 len = be32_to_cpup(p);
3810                 p = xdr_inline_decode(xdr, len);
3811                 if (unlikely(!p))
3812                         goto out_overflow;
3813                 if (owner_name != NULL) {
3814                         owner_name->data = kmemdup(p, len, GFP_NOWAIT);
3815                         if (owner_name->data != NULL) {
3816                                 owner_name->len = len;
3817                                 ret = NFS_ATTR_FATTR_OWNER_NAME;
3818                         }
3819                 } else if (len < XDR_MAX_NETOBJ) {
3820                         if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3821                                 ret = NFS_ATTR_FATTR_OWNER;
3822                         else
3823                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3824                                                 __func__);
3825                 } else
3826                         dprintk("%s: name too long (%u)!\n",
3827                                         __func__, len);
3828                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3829         }
3830         dprintk("%s: uid=%d\n", __func__, (int)*uid);
3831         return ret;
3832 out_overflow:
3833         print_overflow_msg(__func__, xdr);
3834         return -EIO;
3835 }
3836
3837 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3838                 const struct nfs_server *server, uint32_t *gid,
3839                 struct nfs4_string *group_name)
3840 {
3841         uint32_t len;
3842         __be32 *p;
3843         int ret = 0;
3844
3845         *gid = -2;
3846         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3847                 return -EIO;
3848         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3849                 p = xdr_inline_decode(xdr, 4);
3850                 if (unlikely(!p))
3851                         goto out_overflow;
3852                 len = be32_to_cpup(p);
3853                 p = xdr_inline_decode(xdr, len);
3854                 if (unlikely(!p))
3855                         goto out_overflow;
3856                 if (group_name != NULL) {
3857                         group_name->data = kmemdup(p, len, GFP_NOWAIT);
3858                         if (group_name->data != NULL) {
3859                                 group_name->len = len;
3860                                 ret = NFS_ATTR_FATTR_GROUP_NAME;
3861                         }
3862                 } else if (len < XDR_MAX_NETOBJ) {
3863                         if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3864                                 ret = NFS_ATTR_FATTR_GROUP;
3865                         else
3866                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3867                                                 __func__);
3868                 } else
3869                         dprintk("%s: name too long (%u)!\n",
3870                                         __func__, len);
3871                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3872         }
3873         dprintk("%s: gid=%d\n", __func__, (int)*gid);
3874         return ret;
3875 out_overflow:
3876         print_overflow_msg(__func__, xdr);
3877         return -EIO;
3878 }
3879
3880 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3881 {
3882         uint32_t major = 0, minor = 0;
3883         __be32 *p;
3884         int ret = 0;
3885
3886         *rdev = MKDEV(0,0);
3887         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3888                 return -EIO;
3889         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3890                 dev_t tmp;
3891
3892                 p = xdr_inline_decode(xdr, 8);
3893                 if (unlikely(!p))
3894                         goto out_overflow;
3895                 major = be32_to_cpup(p++);
3896                 minor = be32_to_cpup(p);
3897                 tmp = MKDEV(major, minor);
3898                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3899                         *rdev = tmp;
3900                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3901                 ret = NFS_ATTR_FATTR_RDEV;
3902         }
3903         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3904         return ret;
3905 out_overflow:
3906         print_overflow_msg(__func__, xdr);
3907         return -EIO;
3908 }
3909
3910 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3911 {
3912         __be32 *p;
3913         int status = 0;
3914
3915         *res = 0;
3916         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3917                 return -EIO;
3918         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3919                 p = xdr_inline_decode(xdr, 8);
3920                 if (unlikely(!p))
3921                         goto out_overflow;
3922                 xdr_decode_hyper(p, res);
3923                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3924         }
3925         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3926         return status;
3927 out_overflow:
3928         print_overflow_msg(__func__, xdr);
3929         return -EIO;
3930 }
3931
3932 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3933 {
3934         __be32 *p;
3935         int status = 0;
3936
3937         *res = 0;
3938         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3939                 return -EIO;
3940         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3941                 p = xdr_inline_decode(xdr, 8);
3942                 if (unlikely(!p))
3943                         goto out_overflow;
3944                 xdr_decode_hyper(p, res);
3945                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3946         }
3947         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3948         return status;
3949 out_overflow:
3950         print_overflow_msg(__func__, xdr);
3951         return -EIO;
3952 }
3953
3954 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3955 {
3956         __be32 *p;
3957         int status = 0;
3958
3959         *res = 0;
3960         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3961                 return -EIO;
3962         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3963                 p = xdr_inline_decode(xdr, 8);
3964                 if (unlikely(!p))
3965                         goto out_overflow;
3966                 xdr_decode_hyper(p, res);
3967                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3968         }
3969         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3970         return status;
3971 out_overflow:
3972         print_overflow_msg(__func__, xdr);
3973         return -EIO;
3974 }
3975
3976 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3977 {
3978         __be32 *p;
3979         int ret = 0;
3980
3981         *used = 0;
3982         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3983                 return -EIO;
3984         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3985                 p = xdr_inline_decode(xdr, 8);
3986                 if (unlikely(!p))
3987                         goto out_overflow;
3988                 xdr_decode_hyper(p, used);
3989                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3990                 ret = NFS_ATTR_FATTR_SPACE_USED;
3991         }
3992         dprintk("%s: space used=%Lu\n", __func__,
3993                         (unsigned long long)*used);
3994         return ret;
3995 out_overflow:
3996         print_overflow_msg(__func__, xdr);
3997         return -EIO;
3998 }
3999
4000 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
4001 {
4002         __be32 *p;
4003         uint64_t sec;
4004         uint32_t nsec;
4005
4006         p = xdr_inline_decode(xdr, 12);
4007         if (unlikely(!p))
4008                 goto out_overflow;
4009         p = xdr_decode_hyper(p, &sec);
4010         nsec = be32_to_cpup(p);
4011         time->tv_sec = (time_t)sec;
4012         time->tv_nsec = (long)nsec;
4013         return 0;
4014 out_overflow:
4015         print_overflow_msg(__func__, xdr);
4016         return -EIO;
4017 }
4018
4019 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4020 {
4021         int status = 0;
4022
4023         time->tv_sec = 0;
4024         time->tv_nsec = 0;
4025         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4026                 return -EIO;
4027         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4028                 status = decode_attr_time(xdr, time);
4029                 if (status == 0)
4030                         status = NFS_ATTR_FATTR_ATIME;
4031                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4032         }
4033         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4034         return status;
4035 }
4036
4037 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4038 {
4039         int status = 0;
4040
4041         time->tv_sec = 0;
4042         time->tv_nsec = 0;
4043         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4044                 return -EIO;
4045         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4046                 status = decode_attr_time(xdr, time);
4047                 if (status == 0)
4048                         status = NFS_ATTR_FATTR_CTIME;
4049                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4050         }
4051         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4052         return status;
4053 }
4054
4055 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4056                                   struct timespec *time)
4057 {
4058         int status = 0;
4059
4060         time->tv_sec = 0;
4061         time->tv_nsec = 0;
4062         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4063                 return -EIO;
4064         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4065                 status = decode_attr_time(xdr, time);
4066                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4067         }
4068         dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4069                 (long)time->tv_nsec);
4070         return status;
4071 }
4072
4073 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4074 {
4075         int status = 0;
4076
4077         time->tv_sec = 0;
4078         time->tv_nsec = 0;
4079         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4080                 return -EIO;
4081         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4082                 status = decode_attr_time(xdr, time);
4083                 if (status == 0)
4084                         status = NFS_ATTR_FATTR_MTIME;
4085                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4086         }
4087         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4088         return status;
4089 }
4090
4091 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
4092 {
4093         unsigned int attrwords = XDR_QUADLEN(attrlen);
4094         unsigned int nwords = xdr->p - savep;
4095
4096         if (unlikely(attrwords != nwords)) {
4097                 dprintk("%s: server returned incorrect attribute length: "
4098                         "%u %c %u\n",
4099                                 __func__,
4100                                 attrwords << 2,
4101                                 (attrwords < nwords) ? '<' : '>',
4102                                 nwords << 2);
4103                 return -EIO;
4104         }
4105         return 0;
4106 }
4107
4108 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4109 {
4110         __be32 *p;
4111
4112         p = xdr_inline_decode(xdr, 20);
4113         if (unlikely(!p))
4114                 goto out_overflow;
4115         cinfo->atomic = be32_to_cpup(p++);
4116         p = xdr_decode_hyper(p, &cinfo->before);
4117         xdr_decode_hyper(p, &cinfo->after);
4118         return 0;
4119 out_overflow:
4120         print_overflow_msg(__func__, xdr);
4121         return -EIO;
4122 }
4123
4124 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
4125 {
4126         __be32 *p;
4127         uint32_t supp, acc;
4128         int status;
4129
4130         status = decode_op_hdr(xdr, OP_ACCESS);
4131         if (status)
4132                 return status;
4133         p = xdr_inline_decode(xdr, 8);
4134         if (unlikely(!p))
4135                 goto out_overflow;
4136         supp = be32_to_cpup(p++);
4137         acc = be32_to_cpup(p);
4138         access->supported = supp;
4139         access->access = acc;
4140         return 0;
4141 out_overflow:
4142         print_overflow_msg(__func__, xdr);
4143         return -EIO;
4144 }
4145
4146 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4147 {
4148         __be32 *p;
4149
4150         p = xdr_inline_decode(xdr, len);
4151         if (likely(p)) {
4152                 memcpy(buf, p, len);
4153                 return 0;
4154         }
4155         print_overflow_msg(__func__, xdr);
4156         return -EIO;
4157 }
4158
4159 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4160 {
4161         return decode_opaque_fixed(xdr, stateid->data, NFS4_STATEID_SIZE);
4162 }
4163
4164 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4165 {
4166         int status;
4167
4168         status = decode_op_hdr(xdr, OP_CLOSE);
4169         if (status != -EIO)
4170                 nfs_increment_open_seqid(status, res->seqid);
4171         if (!status)
4172                 status = decode_stateid(xdr, &res->stateid);
4173         return status;
4174 }
4175
4176 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4177 {
4178         return decode_opaque_fixed(xdr, verifier, 8);
4179 }
4180
4181 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
4182 {
4183         int status;
4184
4185         status = decode_op_hdr(xdr, OP_COMMIT);
4186         if (!status)
4187                 status = decode_verifier(xdr, res->verf->verifier);
4188         return status;
4189 }
4190
4191 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4192 {
4193         __be32 *p;
4194         uint32_t bmlen;
4195         int status;
4196
4197         status = decode_op_hdr(xdr, OP_CREATE);
4198         if (status)
4199                 return status;
4200         if ((status = decode_change_info(xdr, cinfo)))
4201                 return status;
4202         p = xdr_inline_decode(xdr, 4);
4203         if (unlikely(!p))
4204                 goto out_overflow;
4205         bmlen = be32_to_cpup(p);
4206         p = xdr_inline_decode(xdr, bmlen << 2);
4207         if (likely(p))
4208                 return 0;
4209 out_overflow:
4210         print_overflow_msg(__func__, xdr);
4211         return -EIO;
4212 }
4213
4214 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4215 {
4216         __be32 *savep;
4217         uint32_t attrlen, bitmap[3] = {0};
4218         int status;
4219
4220         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4221                 goto xdr_error;
4222         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4223                 goto xdr_error;
4224         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4225                 goto xdr_error;
4226         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4227                 goto xdr_error;
4228         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4229                 goto xdr_error;
4230         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4231                 goto xdr_error;
4232         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4233                 goto xdr_error;
4234         status = verify_attr_len(xdr, savep, attrlen);
4235 xdr_error:
4236         dprintk("%s: xdr returned %d!\n", __func__, -status);
4237         return status;
4238 }
4239
4240 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4241 {
4242         __be32 *savep;
4243         uint32_t attrlen, bitmap[3] = {0};
4244         int status;
4245
4246         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4247                 goto xdr_error;
4248         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4249                 goto xdr_error;
4250         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4251                 goto xdr_error;
4252
4253         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4254                 goto xdr_error;
4255         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4256                 goto xdr_error;
4257         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4258                 goto xdr_error;
4259         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4260                 goto xdr_error;
4261         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4262                 goto xdr_error;
4263         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4264                 goto xdr_error;
4265
4266         status = verify_attr_len(xdr, savep, attrlen);
4267 xdr_error:
4268         dprintk("%s: xdr returned %d!\n", __func__, -status);
4269         return status;
4270 }
4271
4272 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4273 {
4274         __be32 *savep;
4275         uint32_t attrlen, bitmap[3] = {0};
4276         int status;
4277
4278         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4279                 goto xdr_error;
4280         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4281                 goto xdr_error;
4282         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4283                 goto xdr_error;
4284
4285         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4286                 goto xdr_error;
4287         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4288                 goto xdr_error;
4289
4290         status = verify_attr_len(xdr, savep, attrlen);
4291 xdr_error:
4292         dprintk("%s: xdr returned %d!\n", __func__, -status);
4293         return status;
4294 }
4295
4296 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4297                 struct nfs_fattr *fattr, struct nfs_fh *fh,
4298                 const struct nfs_server *server)
4299 {
4300         int status;
4301         umode_t fmode = 0;
4302         uint32_t type;
4303         int32_t err;
4304
4305         status = decode_attr_type(xdr, bitmap, &type);
4306         if (status < 0)
4307                 goto xdr_error;
4308         fattr->mode = 0;
4309         if (status != 0) {
4310                 fattr->mode |= nfs_type2fmt[type];
4311                 fattr->valid |= status;
4312         }
4313
4314         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4315         if (status < 0)
4316                 goto xdr_error;
4317         fattr->valid |= status;
4318
4319         status = decode_attr_size(xdr, bitmap, &fattr->size);
4320         if (status < 0)
4321                 goto xdr_error;
4322         fattr->valid |= status;
4323
4324         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4325         if (status < 0)
4326                 goto xdr_error;
4327         fattr->valid |= status;
4328
4329         err = 0;
4330         status = decode_attr_error(xdr, bitmap, &err);
4331         if (status < 0)
4332                 goto xdr_error;
4333         if (err == -NFS4ERR_WRONGSEC)
4334                 nfs_fixup_secinfo_attributes(fattr, fh);
4335
4336         status = decode_attr_filehandle(xdr, bitmap, fh);
4337         if (status < 0)
4338                 goto xdr_error;
4339
4340         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4341         if (status < 0)
4342                 goto xdr_error;
4343         fattr->valid |= status;
4344
4345         status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
4346                                                 struct nfs4_fs_locations,
4347                                                 fattr));
4348         if (status < 0)
4349                 goto xdr_error;
4350         fattr->valid |= status;
4351
4352         status = decode_attr_mode(xdr, bitmap, &fmode);
4353         if (status < 0)
4354                 goto xdr_error;
4355         if (status != 0) {
4356                 fattr->mode |= fmode;
4357                 fattr->valid |= status;
4358         }
4359
4360         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4361         if (status < 0)
4362                 goto xdr_error;
4363         fattr->valid |= status;
4364
4365         status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4366         if (status < 0)
4367                 goto xdr_error;
4368         fattr->valid |= status;
4369
4370         status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4371         if (status < 0)
4372                 goto xdr_error;
4373         fattr->valid |= status;
4374
4375         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4376         if (status < 0)
4377                 goto xdr_error;
4378         fattr->valid |= status;
4379
4380         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4381         if (status < 0)
4382                 goto xdr_error;
4383         fattr->valid |= status;
4384
4385         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4386         if (status < 0)
4387                 goto xdr_error;
4388         fattr->valid |= status;
4389
4390         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4391         if (status < 0)
4392                 goto xdr_error;
4393         fattr->valid |= status;
4394
4395         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4396         if (status < 0)
4397                 goto xdr_error;
4398         fattr->valid |= status;
4399
4400         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4401         if (status < 0)
4402                 goto xdr_error;
4403         fattr->valid |= status;
4404
4405 xdr_error:
4406         dprintk("%s: xdr returned %d\n", __func__, -status);
4407         return status;
4408 }
4409
4410 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4411                 struct nfs_fh *fh, const struct nfs_server *server)
4412 {
4413         __be32 *savep;
4414         uint32_t attrlen,
4415                  bitmap[3] = {0};
4416         int status;
4417
4418         status = decode_op_hdr(xdr, OP_GETATTR);
4419         if (status < 0)
4420                 goto xdr_error;
4421
4422         status = decode_attr_bitmap(xdr, bitmap);
4423         if (status < 0)
4424                 goto xdr_error;
4425
4426         status = decode_attr_length(xdr, &attrlen, &savep);
4427         if (status < 0)
4428                 goto xdr_error;
4429
4430         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, server);
4431         if (status < 0)
4432                 goto xdr_error;
4433
4434         status = verify_attr_len(xdr, savep, attrlen);
4435 xdr_error:
4436         dprintk("%s: xdr returned %d\n", __func__, -status);
4437         return status;
4438 }
4439
4440 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4441                 const struct nfs_server *server)
4442 {
4443         return decode_getfattr_generic(xdr, fattr, NULL, server);
4444 }
4445
4446 /*
4447  * Decode potentially multiple layout types. Currently we only support
4448  * one layout driver per file system.
4449  */
4450 static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4451                                          uint32_t *layouttype)
4452 {
4453         uint32_t *p;
4454         int num;
4455
4456         p = xdr_inline_decode(xdr, 4);
4457         if (unlikely(!p))
4458                 goto out_overflow;
4459         num = be32_to_cpup(p);
4460
4461         /* pNFS is not supported by the underlying file system */
4462         if (num == 0) {
4463                 *layouttype = 0;
4464                 return 0;
4465         }
4466         if (num > 1)
4467                 printk(KERN_INFO "%s: Warning: Multiple pNFS layout drivers "
4468                         "per filesystem not supported\n", __func__);
4469
4470         /* Decode and set first layout type, move xdr->p past unused types */
4471         p = xdr_inline_decode(xdr, num * 4);
4472         if (unlikely(!p))
4473                 goto out_overflow;
4474         *layouttype = be32_to_cpup(p);
4475         return 0;
4476 out_overflow:
4477         print_overflow_msg(__func__, xdr);
4478         return -EIO;
4479 }
4480
4481 /*
4482  * The type of file system exported.
4483  * Note we must ensure that layouttype is set in any non-error case.
4484  */
4485 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4486                                 uint32_t *layouttype)
4487 {
4488         int status = 0;
4489
4490         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4491         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4492                 return -EIO;
4493         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4494                 status = decode_first_pnfs_layout_type(xdr, layouttype);
4495                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4496         } else
4497                 *layouttype = 0;
4498         return status;
4499 }
4500
4501 /*
4502  * The prefered block size for layout directed io
4503  */
4504 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4505                                       uint32_t *res)
4506 {
4507         __be32 *p;
4508
4509         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4510         *res = 0;
4511         if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4512                 p = xdr_inline_decode(xdr, 4);
4513                 if (unlikely(!p)) {
4514                         print_overflow_msg(__func__, xdr);
4515                         return -EIO;
4516                 }
4517                 *res = be32_to_cpup(p);
4518                 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4519         }
4520         return 0;
4521 }
4522
4523 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4524 {
4525         __be32 *savep;
4526         uint32_t attrlen, bitmap[3];
4527         int status;
4528
4529         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4530                 goto xdr_error;
4531         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4532                 goto xdr_error;
4533         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4534                 goto xdr_error;
4535
4536         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4537
4538         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4539                 goto xdr_error;
4540         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4541                 goto xdr_error;
4542         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4543                 goto xdr_error;
4544         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4545         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4546                 goto xdr_error;
4547         fsinfo->wtpref = fsinfo->wtmax;
4548         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4549         if (status != 0)
4550                 goto xdr_error;
4551         status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4552         if (status != 0)
4553                 goto xdr_error;
4554         status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4555         if (status)
4556                 goto xdr_error;
4557
4558         status = verify_attr_len(xdr, savep, attrlen);
4559 xdr_error:
4560         dprintk("%s: xdr returned %d!\n", __func__, -status);
4561         return status;
4562 }
4563
4564 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4565 {
4566         __be32 *p;
4567         uint32_t len;
4568         int status;
4569
4570         /* Zero handle first to allow comparisons */
4571         memset(fh, 0, sizeof(*fh));
4572
4573         status = decode_op_hdr(xdr, OP_GETFH);
4574         if (status)
4575                 return status;
4576
4577         p = xdr_inline_decode(xdr, 4);
4578         if (unlikely(!p))
4579                 goto out_overflow;
4580         len = be32_to_cpup(p);
4581         if (len > NFS4_FHSIZE)
4582                 return -EIO;
4583         fh->size = len;
4584         p = xdr_inline_decode(xdr, len);
4585         if (unlikely(!p))
4586                 goto out_overflow;
4587         memcpy(fh->data, p, len);
4588         return 0;
4589 out_overflow:
4590         print_overflow_msg(__func__, xdr);
4591         return -EIO;
4592 }
4593
4594 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4595 {
4596         int status;
4597
4598         status = decode_op_hdr(xdr, OP_LINK);
4599         if (status)
4600                 return status;
4601         return decode_change_info(xdr, cinfo);
4602 }
4603
4604 /*
4605  * We create the owner, so we know a proper owner.id length is 4.
4606  */
4607 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4608 {
4609         uint64_t offset, length, clientid;
4610         __be32 *p;
4611         uint32_t namelen, type;
4612
4613         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4614         if (unlikely(!p))
4615                 goto out_overflow;
4616         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4617         p = xdr_decode_hyper(p, &length);
4618         type = be32_to_cpup(p++); /* 4 byte read */
4619         if (fl != NULL) { /* manipulate file lock */
4620                 fl->fl_start = (loff_t)offset;
4621                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4622                 if (length == ~(uint64_t)0)
4623                         fl->fl_end = OFFSET_MAX;
4624                 fl->fl_type = F_WRLCK;
4625                 if (type & 1)
4626                         fl->fl_type = F_RDLCK;
4627                 fl->fl_pid = 0;
4628         }
4629         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4630         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4631         p = xdr_inline_decode(xdr, namelen); /* variable size field */
4632         if (likely(p))
4633                 return -NFS4ERR_DENIED;
4634 out_overflow:
4635         print_overflow_msg(__func__, xdr);
4636         return -EIO;
4637 }
4638
4639 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4640 {
4641         int status;
4642
4643         status = decode_op_hdr(xdr, OP_LOCK);
4644         if (status == -EIO)
4645                 goto out;
4646         if (status == 0) {
4647                 status = decode_stateid(xdr, &res->stateid);
4648                 if (unlikely(status))
4649                         goto out;
4650         } else if (status == -NFS4ERR_DENIED)
4651                 status = decode_lock_denied(xdr, NULL);
4652         if (res->open_seqid != NULL)
4653                 nfs_increment_open_seqid(status, res->open_seqid);
4654         nfs_increment_lock_seqid(status, res->lock_seqid);
4655 out:
4656         return status;
4657 }
4658
4659 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4660 {
4661         int status;
4662         status = decode_op_hdr(xdr, OP_LOCKT);
4663         if (status == -NFS4ERR_DENIED)
4664                 return decode_lock_denied(xdr, res->denied);
4665         return status;
4666 }
4667
4668 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4669 {
4670         int status;
4671
4672         status = decode_op_hdr(xdr, OP_LOCKU);
4673         if (status != -EIO)
4674                 nfs_increment_lock_seqid(status, res->seqid);
4675         if (status == 0)
4676                 status = decode_stateid(xdr, &res->stateid);
4677         return status;
4678 }
4679
4680 static int decode_release_lockowner(struct xdr_stream *xdr)
4681 {
4682         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4683 }
4684
4685 static int decode_lookup(struct xdr_stream *xdr)
4686 {
4687         return decode_op_hdr(xdr, OP_LOOKUP);
4688 }
4689
4690 /* This is too sick! */
4691 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4692 {
4693         __be32 *p;
4694         uint32_t limit_type, nblocks, blocksize;
4695
4696         p = xdr_inline_decode(xdr, 12);
4697         if (unlikely(!p))
4698                 goto out_overflow;
4699         limit_type = be32_to_cpup(p++);
4700         switch (limit_type) {
4701         case 1:
4702                 xdr_decode_hyper(p, maxsize);
4703                 break;
4704         case 2:
4705                 nblocks = be32_to_cpup(p++);
4706                 blocksize = be32_to_cpup(p);
4707                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4708         }
4709         return 0;
4710 out_overflow:
4711         print_overflow_msg(__func__, xdr);
4712         return -EIO;
4713 }
4714
4715 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4716 {
4717         __be32 *p;
4718         uint32_t delegation_type;
4719         int status;
4720
4721         p = xdr_inline_decode(xdr, 4);
4722         if (unlikely(!p))
4723                 goto out_overflow;
4724         delegation_type = be32_to_cpup(p);
4725         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4726                 res->delegation_type = 0;
4727                 return 0;
4728         }
4729         status = decode_stateid(xdr, &res->delegation);
4730         if (unlikely(status))
4731                 return status;
4732         p = xdr_inline_decode(xdr, 4);
4733         if (unlikely(!p))
4734                 goto out_overflow;
4735         res->do_recall = be32_to_cpup(p);
4736
4737         switch (delegation_type) {
4738         case NFS4_OPEN_DELEGATE_READ:
4739                 res->delegation_type = FMODE_READ;
4740                 break;
4741         case NFS4_OPEN_DELEGATE_WRITE:
4742                 res->delegation_type = FMODE_WRITE|FMODE_READ;
4743                 if (decode_space_limit(xdr, &res->maxsize) < 0)
4744                                 return -EIO;
4745         }
4746         return decode_ace(xdr, NULL, res->server->nfs_client);
4747 out_overflow:
4748         print_overflow_msg(__func__, xdr);
4749         return -EIO;
4750 }
4751
4752 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
4753 {
4754         __be32 *p;
4755         uint32_t savewords, bmlen, i;
4756         int status;
4757
4758         status = decode_op_hdr(xdr, OP_OPEN);
4759         if (status != -EIO)
4760                 nfs_increment_open_seqid(status, res->seqid);
4761         if (!status)
4762                 status = decode_stateid(xdr, &res->stateid);
4763         if (unlikely(status))
4764                 return status;
4765
4766         decode_change_info(xdr, &res->cinfo);
4767
4768         p = xdr_inline_decode(xdr, 8);
4769         if (unlikely(!p))
4770                 goto out_overflow;
4771         res->rflags = be32_to_cpup(p++);
4772         bmlen = be32_to_cpup(p);
4773         if (bmlen > 10)
4774                 goto xdr_error;
4775
4776         p = xdr_inline_decode(xdr, bmlen << 2);
4777         if (unlikely(!p))
4778                 goto out_overflow;
4779         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
4780         for (i = 0; i < savewords; ++i)
4781                 res->attrset[i] = be32_to_cpup(p++);
4782         for (; i < NFS4_BITMAP_SIZE; i++)
4783                 res->attrset[i] = 0;
4784
4785         return decode_delegation(xdr, res);
4786 xdr_error:
4787         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
4788         return -EIO;
4789 out_overflow:
4790         print_overflow_msg(__func__, xdr);
4791         return -EIO;
4792 }
4793
4794 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
4795 {
4796         int status;
4797
4798         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
4799         if (status != -EIO)
4800                 nfs_increment_open_seqid(status, res->seqid);
4801         if (!status)
4802                 status = decode_stateid(xdr, &res->stateid);
4803         return status;
4804 }
4805
4806 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
4807 {
4808         int status;
4809
4810         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
4811         if (status != -EIO)
4812                 nfs_increment_open_seqid(status, res->seqid);
4813         if (!status)
4814                 status = decode_stateid(xdr, &res->stateid);
4815         return status;
4816 }
4817
4818 static int decode_putfh(struct xdr_stream *xdr)
4819 {
4820         return decode_op_hdr(xdr, OP_PUTFH);
4821 }
4822
4823 static int decode_putrootfh(struct xdr_stream *xdr)
4824 {
4825         return decode_op_hdr(xdr, OP_PUTROOTFH);
4826 }
4827
4828 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
4829 {
4830         struct kvec *iov = req->rq_rcv_buf.head;
4831         __be32 *p;
4832         uint32_t count, eof, recvd, hdrlen;
4833         int status;
4834
4835         status = decode_op_hdr(xdr, OP_READ);
4836         if (status)
4837                 return status;
4838         p = xdr_inline_decode(xdr, 8);
4839         if (unlikely(!p))
4840                 goto out_overflow;
4841         eof = be32_to_cpup(p++);
4842         count = be32_to_cpup(p);
4843         hdrlen = (u8 *) xdr->p - (u8 *) iov->iov_base;
4844         recvd = req->rq_rcv_buf.len - hdrlen;
4845         if (count > recvd) {
4846                 dprintk("NFS: server cheating in read reply: "
4847                                 "count %u > recvd %u\n", count, recvd);
4848                 count = recvd;
4849                 eof = 0;
4850         }
4851         xdr_read_pages(xdr, count);
4852         res->eof = eof;
4853         res->count = count;
4854         return 0;
4855 out_overflow:
4856         print_overflow_msg(__func__, xdr);
4857         return -EIO;
4858 }
4859
4860 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
4861 {
4862         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
4863         struct kvec     *iov = rcvbuf->head;
4864         size_t          hdrlen;
4865         u32             recvd, pglen = rcvbuf->page_len;
4866         int             status;
4867
4868         status = decode_op_hdr(xdr, OP_READDIR);
4869         if (!status)
4870                 status = decode_verifier(xdr, readdir->verifier.data);
4871         if (unlikely(status))
4872                 return status;
4873         dprintk("%s: verifier = %08x:%08x\n",
4874                         __func__,
4875                         ((u32 *)readdir->verifier.data)[0],
4876                         ((u32 *)readdir->verifier.data)[1]);
4877
4878
4879         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4880         recvd = rcvbuf->len - hdrlen;
4881         if (pglen > recvd)
4882                 pglen = recvd;
4883         xdr_read_pages(xdr, pglen);
4884
4885
4886         return pglen;
4887 }
4888
4889 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
4890 {
4891         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4892         struct kvec *iov = rcvbuf->head;
4893         size_t hdrlen;
4894         u32 len, recvd;
4895         __be32 *p;
4896         int status;
4897
4898         status = decode_op_hdr(xdr, OP_READLINK);
4899         if (status)
4900                 return status;
4901
4902         /* Convert length of symlink */
4903         p = xdr_inline_decode(xdr, 4);
4904         if (unlikely(!p))
4905                 goto out_overflow;
4906         len = be32_to_cpup(p);
4907         if (len >= rcvbuf->page_len || len <= 0) {
4908                 dprintk("nfs: server returned giant symlink!\n");
4909                 return -ENAMETOOLONG;
4910         }
4911         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4912         recvd = req->rq_rcv_buf.len - hdrlen;
4913         if (recvd < len) {
4914                 dprintk("NFS: server cheating in readlink reply: "
4915                                 "count %u > recvd %u\n", len, recvd);
4916                 return -EIO;
4917         }
4918         xdr_read_pages(xdr, len);
4919         /*
4920          * The XDR encode routine has set things up so that
4921          * the link text will be copied directly into the
4922          * buffer.  We just have to do overflow-checking,
4923          * and and null-terminate the text (the VFS expects
4924          * null-termination).
4925          */
4926         xdr_terminate_string(rcvbuf, len);
4927         return 0;
4928 out_overflow:
4929         print_overflow_msg(__func__, xdr);
4930         return -EIO;
4931 }
4932
4933 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4934 {
4935         int status;
4936
4937         status = decode_op_hdr(xdr, OP_REMOVE);
4938         if (status)
4939                 goto out;
4940         status = decode_change_info(xdr, cinfo);
4941 out:
4942         return status;
4943 }
4944
4945 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
4946               struct nfs4_change_info *new_cinfo)
4947 {
4948         int status;
4949
4950         status = decode_op_hdr(xdr, OP_RENAME);
4951         if (status)
4952                 goto out;
4953         if ((status = decode_change_info(xdr, old_cinfo)))
4954                 goto out;
4955         status = decode_change_info(xdr, new_cinfo);
4956 out:
4957         return status;
4958 }
4959
4960 static int decode_renew(struct xdr_stream *xdr)
4961 {
4962         return decode_op_hdr(xdr, OP_RENEW);
4963 }
4964
4965 static int
4966 decode_restorefh(struct xdr_stream *xdr)
4967 {
4968         return decode_op_hdr(xdr, OP_RESTOREFH);
4969 }
4970
4971 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
4972                          struct nfs_getaclres *res)
4973 {
4974         __be32 *savep, *bm_p;
4975         uint32_t attrlen,
4976                  bitmap[3] = {0};
4977         struct kvec *iov = req->rq_rcv_buf.head;
4978         int status;
4979
4980         res->acl_len = 0;
4981         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4982                 goto out;
4983         bm_p = xdr->p;
4984         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4985                 goto out;
4986         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4987                 goto out;
4988
4989         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
4990                 return -EIO;
4991         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
4992                 size_t hdrlen;
4993                 u32 recvd;
4994
4995                 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
4996                  * are stored with the acl data to handle the problem of
4997                  * variable length bitmaps.*/
4998                 xdr->p = bm_p;
4999                 res->acl_data_offset = be32_to_cpup(bm_p) + 2;
5000                 res->acl_data_offset <<= 2;
5001
5002                 /* We ignore &savep and don't do consistency checks on
5003                  * the attr length.  Let userspace figure it out.... */
5004                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
5005                 attrlen += res->acl_data_offset;
5006                 recvd = req->rq_rcv_buf.len - hdrlen;
5007                 if (attrlen > recvd) {
5008                         if (res->acl_flags & NFS4_ACL_LEN_REQUEST) {
5009                                 /* getxattr interface called with a NULL buf */
5010                                 res->acl_len = attrlen;
5011                                 goto out;
5012                         }
5013                         dprintk("NFS: acl reply: attrlen %u > recvd %u\n",
5014                                         attrlen, recvd);
5015                         return -EINVAL;
5016                 }
5017                 xdr_read_pages(xdr, attrlen);
5018                 res->acl_len = attrlen;
5019         } else
5020                 status = -EOPNOTSUPP;
5021
5022 out:
5023         return status;
5024 }
5025
5026 static int
5027 decode_savefh(struct xdr_stream *xdr)
5028 {
5029         return decode_op_hdr(xdr, OP_SAVEFH);
5030 }
5031
5032 static int decode_setattr(struct xdr_stream *xdr)
5033 {
5034         __be32 *p;
5035         uint32_t bmlen;
5036         int status;
5037
5038         status = decode_op_hdr(xdr, OP_SETATTR);
5039         if (status)
5040                 return status;
5041         p = xdr_inline_decode(xdr, 4);
5042         if (unlikely(!p))
5043                 goto out_overflow;
5044         bmlen = be32_to_cpup(p);
5045         p = xdr_inline_decode(xdr, bmlen << 2);
5046         if (likely(p))
5047                 return 0;
5048 out_overflow:
5049         print_overflow_msg(__func__, xdr);
5050         return -EIO;
5051 }
5052
5053 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5054 {
5055         __be32 *p;
5056         uint32_t opnum;
5057         int32_t nfserr;
5058
5059         p = xdr_inline_decode(xdr, 8);
5060         if (unlikely(!p))
5061                 goto out_overflow;
5062         opnum = be32_to_cpup(p++);
5063         if (opnum != OP_SETCLIENTID) {
5064                 dprintk("nfs: decode_setclientid: Server returned operation"
5065                         " %d\n", opnum);
5066                 return -EIO;
5067         }
5068         nfserr = be32_to_cpup(p);
5069         if (nfserr == NFS_OK) {
5070                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5071                 if (unlikely(!p))
5072                         goto out_overflow;
5073                 p = xdr_decode_hyper(p, &res->clientid);
5074                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5075         } else if (nfserr == NFSERR_CLID_INUSE) {
5076                 uint32_t len;
5077
5078                 /* skip netid string */
5079                 p = xdr_inline_decode(xdr, 4);
5080                 if (unlikely(!p))
5081                         goto out_overflow;
5082                 len = be32_to_cpup(p);
5083                 p = xdr_inline_decode(xdr, len);
5084                 if (unlikely(!p))
5085                         goto out_overflow;
5086
5087                 /* skip uaddr string */
5088                 p = xdr_inline_decode(xdr, 4);
5089                 if (unlikely(!p))
5090                         goto out_overflow;
5091                 len = be32_to_cpup(p);
5092                 p = xdr_inline_decode(xdr, len);
5093                 if (unlikely(!p))
5094                         goto out_overflow;
5095                 return -NFSERR_CLID_INUSE;
5096         } else
5097                 return nfs4_stat_to_errno(nfserr);
5098
5099         return 0;
5100 out_overflow:
5101         print_overflow_msg(__func__, xdr);
5102         return -EIO;
5103 }
5104
5105 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5106 {
5107         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5108 }
5109
5110 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
5111 {
5112         __be32 *p;
5113         int status;
5114
5115         status = decode_op_hdr(xdr, OP_WRITE);
5116         if (status)
5117                 return status;
5118
5119         p = xdr_inline_decode(xdr, 16);
5120         if (unlikely(!p))
5121                 goto out_overflow;
5122         res->count = be32_to_cpup(p++);
5123         res->verf->committed = be32_to_cpup(p++);
5124         memcpy(res->verf->verifier, p, 8);
5125         return 0;
5126 out_overflow:
5127         print_overflow_msg(__func__, xdr);
5128         return -EIO;
5129 }
5130
5131 static int decode_delegreturn(struct xdr_stream *xdr)
5132 {
5133         return decode_op_hdr(xdr, OP_DELEGRETURN);
5134 }
5135
5136 static int decode_secinfo_gss(struct xdr_stream *xdr, struct nfs4_secinfo_flavor *flavor)
5137 {
5138         __be32 *p;
5139
5140         p = xdr_inline_decode(xdr, 4);
5141         if (unlikely(!p))
5142                 goto out_overflow;
5143         flavor->gss.sec_oid4.len = be32_to_cpup(p);
5144         if (flavor->gss.sec_oid4.len > GSS_OID_MAX_LEN)
5145                 goto out_err;
5146
5147         p = xdr_inline_decode(xdr, flavor->gss.sec_oid4.len);
5148         if (unlikely(!p))
5149                 goto out_overflow;
5150         memcpy(flavor->gss.sec_oid4.data, p, flavor->gss.sec_oid4.len);
5151
5152         p = xdr_inline_decode(xdr, 8);
5153         if (unlikely(!p))
5154                 goto out_overflow;
5155         flavor->gss.qop4 = be32_to_cpup(p++);
5156         flavor->gss.service = be32_to_cpup(p);
5157
5158         return 0;
5159
5160 out_overflow:
5161         print_overflow_msg(__func__, xdr);
5162         return -EIO;
5163 out_err:
5164         return -EINVAL;
5165 }
5166
5167 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5168 {
5169         struct nfs4_secinfo_flavor *sec_flavor;
5170         int status;
5171         __be32 *p;
5172         int i, num_flavors;
5173
5174         status = decode_op_hdr(xdr, OP_SECINFO);
5175         if (status)
5176                 goto out;
5177         p = xdr_inline_decode(xdr, 4);
5178         if (unlikely(!p))
5179                 goto out_overflow;
5180
5181         res->flavors->num_flavors = 0;
5182         num_flavors = be32_to_cpup(p);
5183
5184         for (i = 0; i < num_flavors; i++) {
5185                 sec_flavor = &res->flavors->flavors[i];
5186                 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5187                         break;
5188
5189                 p = xdr_inline_decode(xdr, 4);
5190                 if (unlikely(!p))
5191                         goto out_overflow;
5192                 sec_flavor->flavor = be32_to_cpup(p);
5193
5194                 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5195                         status = decode_secinfo_gss(xdr, sec_flavor);
5196                         if (status)
5197                                 goto out;
5198                 }
5199                 res->flavors->num_flavors++;
5200         }
5201
5202 out:
5203         return status;
5204 out_overflow:
5205         print_overflow_msg(__func__, xdr);
5206         return -EIO;
5207 }
5208
5209 #if defined(CONFIG_NFS_V4_1)
5210 static int decode_exchange_id(struct xdr_stream *xdr,
5211                               struct nfs41_exchange_id_res *res)
5212 {
5213         __be32 *p;
5214         uint32_t dummy;
5215         char *dummy_str;
5216         int status;
5217         struct nfs_client *clp = res->client;
5218
5219         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5220         if (status)
5221                 return status;
5222
5223         p = xdr_inline_decode(xdr, 8);
5224         if (unlikely(!p))
5225                 goto out_overflow;
5226         xdr_decode_hyper(p, &clp->cl_clientid);
5227         p = xdr_inline_decode(xdr, 12);
5228         if (unlikely(!p))
5229                 goto out_overflow;
5230         clp->cl_seqid = be32_to_cpup(p++);
5231         clp->cl_exchange_flags = be32_to_cpup(p++);
5232
5233         /* We ask for SP4_NONE */
5234         dummy = be32_to_cpup(p);
5235         if (dummy != SP4_NONE)
5236                 return -EIO;
5237
5238         /* Throw away minor_id */
5239         p = xdr_inline_decode(xdr, 8);
5240         if (unlikely(!p))
5241                 goto out_overflow;
5242
5243         /* Throw away Major id */
5244         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5245         if (unlikely(status))
5246                 return status;
5247
5248         /* Save server_scope */
5249         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5250         if (unlikely(status))
5251                 return status;
5252
5253         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5254                 return -EIO;
5255
5256         memcpy(res->server_scope->server_scope, dummy_str, dummy);
5257         res->server_scope->server_scope_sz = dummy;
5258
5259         /* Throw away Implementation id array */
5260         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5261         if (unlikely(status))
5262                 return status;
5263
5264         return 0;
5265 out_overflow:
5266         print_overflow_msg(__func__, xdr);
5267         return -EIO;
5268 }
5269
5270 static int decode_chan_attrs(struct xdr_stream *xdr,
5271                              struct nfs4_channel_attrs *attrs)
5272 {
5273         __be32 *p;
5274         u32 nr_attrs, val;
5275
5276         p = xdr_inline_decode(xdr, 28);
5277         if (unlikely(!p))
5278                 goto out_overflow;
5279         val = be32_to_cpup(p++);        /* headerpadsz */
5280         if (val)
5281                 return -EINVAL;         /* no support for header padding yet */
5282         attrs->max_rqst_sz = be32_to_cpup(p++);
5283         attrs->max_resp_sz = be32_to_cpup(p++);
5284         attrs->max_resp_sz_cached = be32_to_cpup(p++);
5285         attrs->max_ops = be32_to_cpup(p++);
5286         attrs->max_reqs = be32_to_cpup(p++);
5287         nr_attrs = be32_to_cpup(p);
5288         if (unlikely(nr_attrs > 1)) {
5289                 printk(KERN_WARNING "%s: Invalid rdma channel attrs count %u\n",
5290                         __func__, nr_attrs);
5291                 return -EINVAL;
5292         }
5293         if (nr_attrs == 1) {
5294                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5295                 if (unlikely(!p))
5296                         goto out_overflow;
5297         }
5298         return 0;
5299 out_overflow:
5300         print_overflow_msg(__func__, xdr);
5301         return -EIO;
5302 }
5303
5304 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5305 {
5306         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5307 }
5308
5309 static int decode_create_session(struct xdr_stream *xdr,
5310                                  struct nfs41_create_session_res *res)
5311 {
5312         __be32 *p;
5313         int status;
5314         struct nfs_client *clp = res->client;
5315         struct nfs4_session *session = clp->cl_session;
5316
5317         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5318         if (!status)
5319                 status = decode_sessionid(xdr, &session->sess_id);
5320         if (unlikely(status))
5321                 return status;
5322
5323         /* seqid, flags */
5324         p = xdr_inline_decode(xdr, 8);
5325         if (unlikely(!p))
5326                 goto out_overflow;
5327         clp->cl_seqid = be32_to_cpup(p++);
5328         session->flags = be32_to_cpup(p);
5329
5330         /* Channel attributes */
5331         status = decode_chan_attrs(xdr, &session->fc_attrs);
5332         if (!status)
5333                 status = decode_chan_attrs(xdr, &session->bc_attrs);
5334         return status;
5335 out_overflow:
5336         print_overflow_msg(__func__, xdr);
5337         return -EIO;
5338 }
5339
5340 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5341 {
5342         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5343 }
5344
5345 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5346 {
5347         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5348 }
5349 #endif /* CONFIG_NFS_V4_1 */
5350
5351 static int decode_sequence(struct xdr_stream *xdr,
5352                            struct nfs4_sequence_res *res,
5353                            struct rpc_rqst *rqstp)
5354 {
5355 #if defined(CONFIG_NFS_V4_1)
5356         struct nfs4_sessionid id;
5357         u32 dummy;
5358         int status;
5359         __be32 *p;
5360
5361         if (!res->sr_session)
5362                 return 0;
5363
5364         status = decode_op_hdr(xdr, OP_SEQUENCE);
5365         if (!status)
5366                 status = decode_sessionid(xdr, &id);
5367         if (unlikely(status))
5368                 goto out_err;
5369
5370         /*
5371          * If the server returns different values for sessionID, slotID or
5372          * sequence number, the server is looney tunes.
5373          */
5374         status = -EREMOTEIO;
5375
5376         if (memcmp(id.data, res->sr_session->sess_id.data,
5377                    NFS4_MAX_SESSIONID_LEN)) {
5378                 dprintk("%s Invalid session id\n", __func__);
5379                 goto out_err;
5380         }
5381
5382         p = xdr_inline_decode(xdr, 20);
5383         if (unlikely(!p))
5384                 goto out_overflow;
5385
5386         /* seqid */
5387         dummy = be32_to_cpup(p++);
5388         if (dummy != res->sr_slot->seq_nr) {
5389                 dprintk("%s Invalid sequence number\n", __func__);
5390                 goto out_err;
5391         }
5392         /* slot id */
5393         dummy = be32_to_cpup(p++);
5394         if (dummy != res->sr_slot - res->sr_session->fc_slot_table.slots) {
5395                 dprintk("%s Invalid slot id\n", __func__);
5396                 goto out_err;
5397         }
5398         /* highest slot id - currently not processed */
5399         dummy = be32_to_cpup(p++);
5400         /* target highest slot id - currently not processed */
5401         dummy = be32_to_cpup(p++);
5402         /* result flags */
5403         res->sr_status_flags = be32_to_cpup(p);
5404         status = 0;
5405 out_err:
5406         res->sr_status = status;
5407         return status;
5408 out_overflow:
5409         print_overflow_msg(__func__, xdr);
5410         status = -EIO;
5411         goto out_err;
5412 #else  /* CONFIG_NFS_V4_1 */
5413         return 0;
5414 #endif /* CONFIG_NFS_V4_1 */
5415 }
5416
5417 #if defined(CONFIG_NFS_V4_1)
5418 /*
5419  * TODO: Need to handle case when EOF != true;
5420  */
5421 static int decode_getdevicelist(struct xdr_stream *xdr,
5422                                 struct pnfs_devicelist *res)
5423 {
5424         __be32 *p;
5425         int status, i;
5426         struct nfs_writeverf verftemp;
5427
5428         status = decode_op_hdr(xdr, OP_GETDEVICELIST);
5429         if (status)
5430                 return status;
5431
5432         p = xdr_inline_decode(xdr, 8 + 8 + 4);
5433         if (unlikely(!p))
5434                 goto out_overflow;
5435
5436         /* TODO: Skip cookie for now */
5437         p += 2;
5438
5439         /* Read verifier */
5440         p = xdr_decode_opaque_fixed(p, verftemp.verifier, 8);
5441
5442         res->num_devs = be32_to_cpup(p);
5443
5444         dprintk("%s: num_dev %d\n", __func__, res->num_devs);
5445
5446         if (res->num_devs > NFS4_PNFS_GETDEVLIST_MAXNUM) {
5447                 printk(KERN_ERR "%s too many result dev_num %u\n",
5448                                 __func__, res->num_devs);
5449                 return -EIO;
5450         }
5451
5452         p = xdr_inline_decode(xdr,
5453                               res->num_devs * NFS4_DEVICEID4_SIZE + 4);
5454         if (unlikely(!p))
5455                 goto out_overflow;
5456         for (i = 0; i < res->num_devs; i++)
5457                 p = xdr_decode_opaque_fixed(p, res->dev_id[i].data,
5458                                             NFS4_DEVICEID4_SIZE);
5459         res->eof = be32_to_cpup(p);
5460         return 0;
5461 out_overflow:
5462         print_overflow_msg(__func__, xdr);
5463         return -EIO;
5464 }
5465
5466 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5467                                 struct pnfs_device *pdev)
5468 {
5469         __be32 *p;
5470         uint32_t len, type;
5471         int status;
5472
5473         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5474         if (status) {
5475                 if (status == -ETOOSMALL) {
5476                         p = xdr_inline_decode(xdr, 4);
5477                         if (unlikely(!p))
5478                                 goto out_overflow;
5479                         pdev->mincount = be32_to_cpup(p);
5480                         dprintk("%s: Min count too small. mincnt = %u\n",
5481                                 __func__, pdev->mincount);
5482                 }
5483                 return status;
5484         }
5485
5486         p = xdr_inline_decode(xdr, 8);
5487         if (unlikely(!p))
5488                 goto out_overflow;
5489         type = be32_to_cpup(p++);
5490         if (type != pdev->layout_type) {
5491                 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5492                         __func__, pdev->layout_type, type);
5493                 return -EINVAL;
5494         }
5495         /*
5496          * Get the length of the opaque device_addr4. xdr_read_pages places
5497          * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5498          * and places the remaining xdr data in xdr_buf->tail
5499          */
5500         pdev->mincount = be32_to_cpup(p);
5501         xdr_read_pages(xdr, pdev->mincount); /* include space for the length */
5502
5503         /* Parse notification bitmap, verifying that it is zero. */
5504         p = xdr_inline_decode(xdr, 4);
5505         if (unlikely(!p))
5506                 goto out_overflow;
5507         len = be32_to_cpup(p);
5508         if (len) {
5509                 uint32_t i;
5510
5511                 p = xdr_inline_decode(xdr, 4 * len);
5512                 if (unlikely(!p))
5513                         goto out_overflow;
5514                 for (i = 0; i < len; i++, p++) {
5515                         if (be32_to_cpup(p)) {
5516                                 dprintk("%s: notifications not supported\n",
5517                                         __func__);
5518                                 return -EIO;
5519                         }
5520                 }
5521         }
5522         return 0;
5523 out_overflow:
5524         print_overflow_msg(__func__, xdr);
5525         return -EIO;
5526 }
5527
5528 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5529                             struct nfs4_layoutget_res *res)
5530 {
5531         __be32 *p;
5532         int status;
5533         u32 layout_count;
5534         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5535         struct kvec *iov = rcvbuf->head;
5536         u32 hdrlen, recvd;
5537
5538         status = decode_op_hdr(xdr, OP_LAYOUTGET);
5539         if (status)
5540                 return status;
5541         p = xdr_inline_decode(xdr, 8 + NFS4_STATEID_SIZE);
5542         if (unlikely(!p))
5543                 goto out_overflow;
5544         res->return_on_close = be32_to_cpup(p++);
5545         p = xdr_decode_opaque_fixed(p, res->stateid.data, NFS4_STATEID_SIZE);
5546         layout_count = be32_to_cpup(p);
5547         if (!layout_count) {
5548                 dprintk("%s: server responded with empty layout array\n",
5549                         __func__);
5550                 return -EINVAL;
5551         }
5552
5553         p = xdr_inline_decode(xdr, 28);
5554         if (unlikely(!p))
5555                 goto out_overflow;
5556         p = xdr_decode_hyper(p, &res->range.offset);
5557         p = xdr_decode_hyper(p, &res->range.length);
5558         res->range.iomode = be32_to_cpup(p++);
5559         res->type = be32_to_cpup(p++);
5560         res->layoutp->len = be32_to_cpup(p);
5561
5562         dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5563                 __func__,
5564                 (unsigned long)res->range.offset,
5565                 (unsigned long)res->range.length,
5566                 res->range.iomode,
5567                 res->type,
5568                 res->layoutp->len);
5569
5570         hdrlen = (u8 *) xdr->p - (u8 *) iov->iov_base;
5571         recvd = req->rq_rcv_buf.len - hdrlen;
5572         if (res->layoutp->len > recvd) {
5573                 dprintk("NFS: server cheating in layoutget reply: "
5574                                 "layout len %u > recvd %u\n",
5575                                 res->layoutp->len, recvd);
5576                 return -EINVAL;
5577         }
5578
5579         xdr_read_pages(xdr, res->layoutp->len);
5580
5581         if (layout_count > 1) {
5582                 /* We only handle a length one array at the moment.  Any
5583                  * further entries are just ignored.  Note that this means
5584                  * the client may see a response that is less than the
5585                  * minimum it requested.
5586                  */
5587                 dprintk("%s: server responded with %d layouts, dropping tail\n",
5588                         __func__, layout_count);
5589         }
5590
5591         return 0;
5592 out_overflow:
5593         print_overflow_msg(__func__, xdr);
5594         return -EIO;
5595 }
5596
5597 static int decode_layoutreturn(struct xdr_stream *xdr,
5598                                struct nfs4_layoutreturn_res *res)
5599 {
5600         __be32 *p;
5601         int status;
5602
5603         status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5604         if (status)
5605                 return status;
5606         p = xdr_inline_decode(xdr, 4);
5607         if (unlikely(!p))
5608                 goto out_overflow;
5609         res->lrs_present = be32_to_cpup(p);
5610         if (res->lrs_present)
5611                 status = decode_stateid(xdr, &res->stateid);
5612         return status;
5613 out_overflow:
5614         print_overflow_msg(__func__, xdr);
5615         return -EIO;
5616 }
5617
5618 static int decode_layoutcommit(struct xdr_stream *xdr,
5619                                struct rpc_rqst *req,
5620                                struct nfs4_layoutcommit_res *res)
5621 {
5622         __be32 *p;
5623         __u32 sizechanged;
5624         int status;
5625
5626         status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5627         res->status = status;
5628         if (status)
5629                 return status;
5630
5631         p = xdr_inline_decode(xdr, 4);
5632         if (unlikely(!p))
5633                 goto out_overflow;
5634         sizechanged = be32_to_cpup(p);
5635
5636         if (sizechanged) {
5637                 /* throw away new size */
5638                 p = xdr_inline_decode(xdr, 8);
5639                 if (unlikely(!p))
5640                         goto out_overflow;
5641         }
5642         return 0;
5643 out_overflow:
5644         print_overflow_msg(__func__, xdr);
5645         return -EIO;
5646 }
5647
5648 static int decode_test_stateid(struct xdr_stream *xdr,
5649                                struct nfs41_test_stateid_res *res)
5650 {
5651         __be32 *p;
5652         int status;
5653         int num_res;
5654
5655         status = decode_op_hdr(xdr, OP_TEST_STATEID);
5656         if (status)
5657                 return status;
5658
5659         p = xdr_inline_decode(xdr, 4);
5660         if (unlikely(!p))
5661                 goto out_overflow;
5662         num_res = be32_to_cpup(p++);
5663         if (num_res != 1)
5664                 goto out;
5665
5666         p = xdr_inline_decode(xdr, 4);
5667         if (unlikely(!p))
5668                 goto out_overflow;
5669         res->status = be32_to_cpup(p++);
5670         return res->status;
5671 out_overflow:
5672         print_overflow_msg(__func__, xdr);
5673 out:
5674         return -EIO;
5675 }
5676
5677 static int decode_free_stateid(struct xdr_stream *xdr,
5678                                struct nfs41_free_stateid_res *res)
5679 {
5680         __be32 *p;
5681         int status;
5682
5683         status = decode_op_hdr(xdr, OP_FREE_STATEID);
5684         if (status)
5685                 return status;
5686
5687         p = xdr_inline_decode(xdr, 4);
5688         if (unlikely(!p))
5689                 goto out_overflow;
5690         res->status = be32_to_cpup(p++);
5691         return res->status;
5692 out_overflow:
5693         print_overflow_msg(__func__, xdr);
5694         return -EIO;
5695 }
5696 #endif /* CONFIG_NFS_V4_1 */
5697
5698 /*
5699  * END OF "GENERIC" DECODE ROUTINES.
5700  */
5701
5702 /*
5703  * Decode OPEN_DOWNGRADE response
5704  */
5705 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
5706                                        struct xdr_stream *xdr,
5707                                        struct nfs_closeres *res)
5708 {
5709         struct compound_hdr hdr;
5710         int status;
5711
5712         status = decode_compound_hdr(xdr, &hdr);
5713         if (status)
5714                 goto out;
5715         status = decode_sequence(xdr, &res->seq_res, rqstp);
5716         if (status)
5717                 goto out;
5718         status = decode_putfh(xdr);
5719         if (status)
5720                 goto out;
5721         status = decode_open_downgrade(xdr, res);
5722         if (status != 0)
5723                 goto out;
5724         decode_getfattr(xdr, res->fattr, res->server);
5725 out:
5726         return status;
5727 }
5728
5729 /*
5730  * Decode ACCESS response
5731  */
5732 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5733                                struct nfs4_accessres *res)
5734 {
5735         struct compound_hdr hdr;
5736         int status;
5737
5738         status = decode_compound_hdr(xdr, &hdr);
5739         if (status)
5740                 goto out;
5741         status = decode_sequence(xdr, &res->seq_res, rqstp);
5742         if (status)
5743                 goto out;
5744         status = decode_putfh(xdr);
5745         if (status != 0)
5746                 goto out;
5747         status = decode_access(xdr, res);
5748         if (status != 0)
5749                 goto out;
5750         decode_getfattr(xdr, res->fattr, res->server);
5751 out:
5752         return status;
5753 }
5754
5755 /*
5756  * Decode LOOKUP response
5757  */
5758 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5759                                struct nfs4_lookup_res *res)
5760 {
5761         struct compound_hdr hdr;
5762         int status;
5763
5764         status = decode_compound_hdr(xdr, &hdr);
5765         if (status)
5766                 goto out;
5767         status = decode_sequence(xdr, &res->seq_res, rqstp);
5768         if (status)
5769                 goto out;
5770         status = decode_putfh(xdr);
5771         if (status)
5772                 goto out;
5773         status = decode_lookup(xdr);
5774         if (status)
5775                 goto out;
5776         status = decode_getfh(xdr, res->fh);
5777         if (status)
5778                 goto out;
5779         status = decode_getfattr(xdr, res->fattr, res->server);
5780 out:
5781         return status;
5782 }
5783
5784 /*
5785  * Decode LOOKUP_ROOT response
5786  */
5787 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
5788                                     struct xdr_stream *xdr,
5789                                     struct nfs4_lookup_res *res)
5790 {
5791         struct compound_hdr hdr;
5792         int status;
5793
5794         status = decode_compound_hdr(xdr, &hdr);
5795         if (status)
5796                 goto out;
5797         status = decode_sequence(xdr, &res->seq_res, rqstp);
5798         if (status)
5799                 goto out;
5800         status = decode_putrootfh(xdr);
5801         if (status)
5802                 goto out;
5803         status = decode_getfh(xdr, res->fh);
5804         if (status == 0)
5805                 status = decode_getfattr(xdr, res->fattr, res->server);
5806 out:
5807         return status;
5808 }
5809
5810 /*
5811  * Decode REMOVE response
5812  */
5813 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5814                                struct nfs_removeres *res)
5815 {
5816         struct compound_hdr hdr;
5817         int status;
5818
5819         status = decode_compound_hdr(xdr, &hdr);
5820         if (status)
5821                 goto out;
5822         status = decode_sequence(xdr, &res->seq_res, rqstp);
5823         if (status)
5824                 goto out;
5825         status = decode_putfh(xdr);
5826         if (status)
5827                 goto out;
5828         status = decode_remove(xdr, &res->cinfo);
5829         if (status)
5830                 goto out;
5831         decode_getfattr(xdr, res->dir_attr, res->server);
5832 out:
5833         return status;
5834 }
5835
5836 /*
5837  * Decode RENAME response
5838  */
5839 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5840                                struct nfs_renameres *res)
5841 {
5842         struct compound_hdr hdr;
5843         int status;
5844
5845         status = decode_compound_hdr(xdr, &hdr);
5846         if (status)
5847                 goto out;
5848         status = decode_sequence(xdr, &res->seq_res, rqstp);
5849         if (status)
5850                 goto out;
5851         status = decode_putfh(xdr);
5852         if (status)
5853                 goto out;
5854         status = decode_savefh(xdr);
5855         if (status)
5856                 goto out;
5857         status = decode_putfh(xdr);
5858         if (status)
5859                 goto out;
5860         status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
5861         if (status)
5862                 goto out;
5863         /* Current FH is target directory */
5864         if (decode_getfattr(xdr, res->new_fattr, res->server))
5865                 goto out;
5866         status = decode_restorefh(xdr);
5867         if (status)
5868                 goto out;
5869         decode_getfattr(xdr, res->old_fattr, res->server);
5870 out:
5871         return status;
5872 }
5873
5874 /*
5875  * Decode LINK response
5876  */
5877 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5878                              struct nfs4_link_res *res)
5879 {
5880         struct compound_hdr hdr;
5881         int status;
5882
5883         status = decode_compound_hdr(xdr, &hdr);
5884         if (status)
5885                 goto out;
5886         status = decode_sequence(xdr, &res->seq_res, rqstp);
5887         if (status)
5888                 goto out;
5889         status = decode_putfh(xdr);
5890         if (status)
5891                 goto out;
5892         status = decode_savefh(xdr);
5893         if (status)
5894                 goto out;
5895         status = decode_putfh(xdr);
5896         if (status)
5897                 goto out;
5898         status = decode_link(xdr, &res->cinfo);
5899         if (status)
5900                 goto out;
5901         /*
5902          * Note order: OP_LINK leaves the directory as the current
5903          *             filehandle.
5904          */
5905         if (decode_getfattr(xdr, res->dir_attr, res->server))
5906                 goto out;
5907         status = decode_restorefh(xdr);
5908         if (status)
5909                 goto out;
5910         decode_getfattr(xdr, res->fattr, res->server);
5911 out:
5912         return status;
5913 }
5914
5915 /*
5916  * Decode CREATE response
5917  */
5918 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5919                                struct nfs4_create_res *res)
5920 {
5921         struct compound_hdr hdr;
5922         int status;
5923
5924         status = decode_compound_hdr(xdr, &hdr);
5925         if (status)
5926                 goto out;
5927         status = decode_sequence(xdr, &res->seq_res, rqstp);
5928         if (status)
5929                 goto out;
5930         status = decode_putfh(xdr);
5931         if (status)
5932                 goto out;
5933         status = decode_savefh(xdr);
5934         if (status)
5935                 goto out;
5936         status = decode_create(xdr, &res->dir_cinfo);
5937         if (status)
5938                 goto out;
5939         status = decode_getfh(xdr, res->fh);
5940         if (status)
5941                 goto out;
5942         if (decode_getfattr(xdr, res->fattr, res->server))
5943                 goto out;
5944         status = decode_restorefh(xdr);
5945         if (status)
5946                 goto out;
5947         decode_getfattr(xdr, res->dir_fattr, res->server);
5948 out:
5949         return status;
5950 }
5951
5952 /*
5953  * Decode SYMLINK response
5954  */
5955 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5956                                 struct nfs4_create_res *res)
5957 {
5958         return nfs4_xdr_dec_create(rqstp, xdr, res);
5959 }
5960
5961 /*
5962  * Decode GETATTR response
5963  */
5964 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5965                                 struct nfs4_getattr_res *res)
5966 {
5967         struct compound_hdr hdr;
5968         int status;
5969
5970         status = decode_compound_hdr(xdr, &hdr);
5971         if (status)
5972                 goto out;
5973         status = decode_sequence(xdr, &res->seq_res, rqstp);
5974         if (status)
5975                 goto out;
5976         status = decode_putfh(xdr);
5977         if (status)
5978                 goto out;
5979         status = decode_getfattr(xdr, res->fattr, res->server);
5980 out:
5981         return status;
5982 }
5983
5984 /*
5985  * Encode an SETACL request
5986  */
5987 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
5988                                 struct nfs_setaclargs *args)
5989 {
5990         struct compound_hdr hdr = {
5991                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
5992         };
5993
5994         encode_compound_hdr(xdr, req, &hdr);
5995         encode_sequence(xdr, &args->seq_args, &hdr);
5996         encode_putfh(xdr, args->fh, &hdr);
5997         encode_setacl(xdr, args, &hdr);
5998         encode_nops(&hdr);
5999 }
6000
6001 /*
6002  * Decode SETACL response
6003  */
6004 static int
6005 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6006                     struct nfs_setaclres *res)
6007 {
6008         struct compound_hdr hdr;
6009         int status;
6010
6011         status = decode_compound_hdr(xdr, &hdr);
6012         if (status)
6013                 goto out;
6014         status = decode_sequence(xdr, &res->seq_res, rqstp);
6015         if (status)
6016                 goto out;
6017         status = decode_putfh(xdr);
6018         if (status)
6019                 goto out;
6020         status = decode_setattr(xdr);
6021 out:
6022         return status;
6023 }
6024
6025 /*
6026  * Decode GETACL response
6027  */
6028 static int
6029 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6030                     struct nfs_getaclres *res)
6031 {
6032         struct compound_hdr hdr;
6033         int status;
6034
6035         status = decode_compound_hdr(xdr, &hdr);
6036         if (status)
6037                 goto out;
6038         status = decode_sequence(xdr, &res->seq_res, rqstp);
6039         if (status)
6040                 goto out;
6041         status = decode_putfh(xdr);
6042         if (status)
6043                 goto out;
6044         status = decode_getacl(xdr, rqstp, res);
6045
6046 out:
6047         return status;
6048 }
6049
6050 /*
6051  * Decode CLOSE response
6052  */
6053 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6054                               struct nfs_closeres *res)
6055 {
6056         struct compound_hdr hdr;
6057         int status;
6058
6059         status = decode_compound_hdr(xdr, &hdr);
6060         if (status)
6061                 goto out;
6062         status = decode_sequence(xdr, &res->seq_res, rqstp);
6063         if (status)
6064                 goto out;
6065         status = decode_putfh(xdr);
6066         if (status)
6067                 goto out;
6068         status = decode_close(xdr, res);
6069         if (status != 0)
6070                 goto out;
6071         /*
6072          * Note: Server may do delete on close for this file
6073          *      in which case the getattr call will fail with
6074          *      an ESTALE error. Shouldn't be a problem,
6075          *      though, since fattr->valid will remain unset.
6076          */
6077         decode_getfattr(xdr, res->fattr, res->server);
6078 out:
6079         return status;
6080 }
6081
6082 /*
6083  * Decode OPEN response
6084  */
6085 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6086                              struct nfs_openres *res)
6087 {
6088         struct compound_hdr hdr;
6089         int status;
6090
6091         status = decode_compound_hdr(xdr, &hdr);
6092         if (status)
6093                 goto out;
6094         status = decode_sequence(xdr, &res->seq_res, rqstp);
6095         if (status)
6096                 goto out;
6097         status = decode_putfh(xdr);
6098         if (status)
6099                 goto out;
6100         status = decode_savefh(xdr);
6101         if (status)
6102                 goto out;
6103         status = decode_open(xdr, res);
6104         if (status)
6105                 goto out;
6106         if (decode_getfh(xdr, &res->fh) != 0)
6107                 goto out;
6108         if (decode_getfattr(xdr, res->f_attr, res->server) != 0)
6109                 goto out;
6110         if (decode_restorefh(xdr) != 0)
6111                 goto out;
6112         decode_getfattr(xdr, res->dir_attr, res->server);
6113 out:
6114         return status;
6115 }
6116
6117 /*
6118  * Decode OPEN_CONFIRM response
6119  */
6120 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6121                                      struct xdr_stream *xdr,
6122                                      struct nfs_open_confirmres *res)
6123 {
6124         struct compound_hdr hdr;
6125         int status;
6126
6127         status = decode_compound_hdr(xdr, &hdr);
6128         if (status)
6129                 goto out;
6130         status = decode_putfh(xdr);
6131         if (status)
6132                 goto out;
6133         status = decode_open_confirm(xdr, res);
6134 out:
6135         return status;
6136 }
6137
6138 /*
6139  * Decode OPEN response
6140  */
6141 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6142                                     struct xdr_stream *xdr,
6143                                     struct nfs_openres *res)
6144 {
6145         struct compound_hdr hdr;
6146         int status;
6147
6148         status = decode_compound_hdr(xdr, &hdr);
6149         if (status)
6150                 goto out;
6151         status = decode_sequence(xdr, &res->seq_res, rqstp);
6152         if (status)
6153                 goto out;
6154         status = decode_putfh(xdr);
6155         if (status)
6156                 goto out;
6157         status = decode_open(xdr, res);
6158         if (status)
6159                 goto out;
6160         decode_getfattr(xdr, res->f_attr, res->server);
6161 out:
6162         return status;
6163 }
6164
6165 /*
6166  * Decode SETATTR response
6167  */
6168 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6169                                 struct xdr_stream *xdr,
6170                                 struct nfs_setattrres *res)
6171 {
6172         struct compound_hdr hdr;
6173         int status;
6174
6175         status = decode_compound_hdr(xdr, &hdr);
6176         if (status)
6177                 goto out;
6178         status = decode_sequence(xdr, &res->seq_res, rqstp);
6179         if (status)
6180                 goto out;
6181         status = decode_putfh(xdr);
6182         if (status)
6183                 goto out;
6184         status = decode_setattr(xdr);
6185         if (status)
6186                 goto out;
6187         decode_getfattr(xdr, res->fattr, res->server);
6188 out:
6189         return status;
6190 }
6191
6192 /*
6193  * Decode LOCK response
6194  */
6195 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6196                              struct nfs_lock_res *res)
6197 {
6198         struct compound_hdr hdr;
6199         int status;
6200
6201         status = decode_compound_hdr(xdr, &hdr);
6202         if (status)
6203                 goto out;
6204         status = decode_sequence(xdr, &res->seq_res, rqstp);
6205         if (status)
6206                 goto out;
6207         status = decode_putfh(xdr);
6208         if (status)
6209                 goto out;
6210         status = decode_lock(xdr, res);
6211 out:
6212         return status;
6213 }
6214
6215 /*
6216  * Decode LOCKT response
6217  */
6218 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6219                               struct nfs_lockt_res *res)
6220 {
6221         struct compound_hdr hdr;
6222         int status;
6223
6224         status = decode_compound_hdr(xdr, &hdr);
6225         if (status)
6226                 goto out;
6227         status = decode_sequence(xdr, &res->seq_res, rqstp);
6228         if (status)
6229                 goto out;
6230         status = decode_putfh(xdr);
6231         if (status)
6232                 goto out;
6233         status = decode_lockt(xdr, res);
6234 out:
6235         return status;
6236 }
6237
6238 /*
6239  * Decode LOCKU response
6240  */
6241 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6242                               struct nfs_locku_res *res)
6243 {
6244         struct compound_hdr hdr;
6245         int status;
6246
6247         status = decode_compound_hdr(xdr, &hdr);
6248         if (status)
6249                 goto out;
6250         status = decode_sequence(xdr, &res->seq_res, rqstp);
6251         if (status)
6252                 goto out;
6253         status = decode_putfh(xdr);
6254         if (status)
6255                 goto out;
6256         status = decode_locku(xdr, res);
6257 out:
6258         return status;
6259 }
6260
6261 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6262                                           struct xdr_stream *xdr, void *dummy)
6263 {
6264         struct compound_hdr hdr;
6265         int status;
6266
6267         status = decode_compound_hdr(xdr, &hdr);
6268         if (!status)
6269                 status = decode_release_lockowner(xdr);
6270         return status;
6271 }
6272
6273 /*
6274  * Decode READLINK response
6275  */
6276 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6277                                  struct xdr_stream *xdr,
6278                                  struct nfs4_readlink_res *res)
6279 {
6280         struct compound_hdr hdr;
6281         int status;
6282
6283         status = decode_compound_hdr(xdr, &hdr);
6284         if (status)
6285                 goto out;
6286         status = decode_sequence(xdr, &res->seq_res, rqstp);
6287         if (status)
6288                 goto out;
6289         status = decode_putfh(xdr);
6290         if (status)
6291                 goto out;
6292         status = decode_readlink(xdr, rqstp);
6293 out:
6294         return status;
6295 }
6296
6297 /*
6298  * Decode READDIR response
6299  */
6300 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6301                                 struct nfs4_readdir_res *res)
6302 {
6303         struct compound_hdr hdr;
6304         int status;
6305
6306         status = decode_compound_hdr(xdr, &hdr);
6307         if (status)
6308                 goto out;
6309         status = decode_sequence(xdr, &res->seq_res, rqstp);
6310         if (status)
6311                 goto out;
6312         status = decode_putfh(xdr);
6313         if (status)
6314                 goto out;
6315         status = decode_readdir(xdr, rqstp, res);
6316 out:
6317         return status;
6318 }
6319
6320 /*
6321  * Decode Read response
6322  */
6323 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6324                              struct nfs_readres *res)
6325 {
6326         struct compound_hdr hdr;
6327         int status;
6328
6329         status = decode_compound_hdr(xdr, &hdr);
6330         if (status)
6331                 goto out;
6332         status = decode_sequence(xdr, &res->seq_res, rqstp);
6333         if (status)
6334                 goto out;
6335         status = decode_putfh(xdr);
6336         if (status)
6337                 goto out;
6338         status = decode_read(xdr, rqstp, res);
6339         if (!status)
6340                 status = res->count;
6341 out:
6342         return status;
6343 }
6344
6345 /*
6346  * Decode WRITE response
6347  */
6348 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6349                               struct nfs_writeres *res)
6350 {
6351         struct compound_hdr hdr;
6352         int status;
6353
6354         status = decode_compound_hdr(xdr, &hdr);
6355         if (status)
6356                 goto out;
6357         status = decode_sequence(xdr, &res->seq_res, rqstp);
6358         if (status)
6359                 goto out;
6360         status = decode_putfh(xdr);
6361         if (status)
6362                 goto out;
6363         status = decode_write(xdr, res);
6364         if (status)
6365                 goto out;
6366         if (res->fattr)
6367                 decode_getfattr(xdr, res->fattr, res->server);
6368         if (!status)
6369                 status = res->count;
6370 out:
6371         return status;
6372 }
6373
6374 /*
6375  * Decode COMMIT response
6376  */
6377 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6378                                struct nfs_writeres *res)
6379 {
6380         struct compound_hdr hdr;
6381         int status;
6382
6383         status = decode_compound_hdr(xdr, &hdr);
6384         if (status)
6385                 goto out;
6386         status = decode_sequence(xdr, &res->seq_res, rqstp);
6387         if (status)
6388                 goto out;
6389         status = decode_putfh(xdr);
6390         if (status)
6391                 goto out;
6392         status = decode_commit(xdr, res);
6393         if (status)
6394                 goto out;
6395         if (res->fattr)
6396                 decode_getfattr(xdr, res->fattr, res->server);
6397 out:
6398         return status;
6399 }
6400
6401 /*
6402  * Decode FSINFO response
6403  */
6404 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6405                                struct nfs4_fsinfo_res *res)
6406 {
6407         struct compound_hdr hdr;
6408         int status;
6409
6410         status = decode_compound_hdr(xdr, &hdr);
6411         if (!status)
6412                 status = decode_sequence(xdr, &res->seq_res, req);
6413         if (!status)
6414                 status = decode_putfh(xdr);
6415         if (!status)
6416                 status = decode_fsinfo(xdr, res->fsinfo);
6417         return status;
6418 }
6419
6420 /*
6421  * Decode PATHCONF response
6422  */
6423 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6424                                  struct nfs4_pathconf_res *res)
6425 {
6426         struct compound_hdr hdr;
6427         int status;
6428
6429         status = decode_compound_hdr(xdr, &hdr);
6430         if (!status)
6431                 status = decode_sequence(xdr, &res->seq_res, req);
6432         if (!status)
6433                 status = decode_putfh(xdr);
6434         if (!status)
6435                 status = decode_pathconf(xdr, res->pathconf);
6436         return status;
6437 }
6438
6439 /*
6440  * Decode STATFS response
6441  */
6442 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6443                                struct nfs4_statfs_res *res)
6444 {
6445         struct compound_hdr hdr;
6446         int status;
6447
6448         status = decode_compound_hdr(xdr, &hdr);
6449         if (!status)
6450                 status = decode_sequence(xdr, &res->seq_res, req);
6451         if (!status)
6452                 status = decode_putfh(xdr);
6453         if (!status)
6454                 status = decode_statfs(xdr, res->fsstat);
6455         return status;
6456 }
6457
6458 /*
6459  * Decode GETATTR_BITMAP response
6460  */
6461 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6462                                     struct xdr_stream *xdr,
6463                                     struct nfs4_server_caps_res *res)
6464 {
6465         struct compound_hdr hdr;
6466         int status;
6467
6468         status = decode_compound_hdr(xdr, &hdr);
6469         if (status)
6470                 goto out;
6471         status = decode_sequence(xdr, &res->seq_res, req);
6472         if (status)
6473                 goto out;
6474         status = decode_putfh(xdr);
6475         if (status)
6476                 goto out;
6477         status = decode_server_caps(xdr, res);
6478 out:
6479         return status;
6480 }
6481
6482 /*
6483  * Decode RENEW response
6484  */
6485 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6486                               void *__unused)
6487 {
6488         struct compound_hdr hdr;
6489         int status;
6490
6491         status = decode_compound_hdr(xdr, &hdr);
6492         if (!status)
6493                 status = decode_renew(xdr);
6494         return status;
6495 }
6496
6497 /*
6498  * Decode SETCLIENTID response
6499  */
6500 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6501                                     struct xdr_stream *xdr,
6502                                     struct nfs4_setclientid_res *res)
6503 {
6504         struct compound_hdr hdr;
6505         int status;
6506
6507         status = decode_compound_hdr(xdr, &hdr);
6508         if (!status)
6509                 status = decode_setclientid(xdr, res);
6510         return status;
6511 }
6512
6513 /*
6514  * Decode SETCLIENTID_CONFIRM response
6515  */
6516 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6517                                             struct xdr_stream *xdr,
6518                                             struct nfs_fsinfo *fsinfo)
6519 {
6520         struct compound_hdr hdr;
6521         int status;
6522
6523         status = decode_compound_hdr(xdr, &hdr);
6524         if (!status)
6525                 status = decode_setclientid_confirm(xdr);
6526         if (!status)
6527                 status = decode_putrootfh(xdr);
6528         if (!status)
6529                 status = decode_fsinfo(xdr, fsinfo);
6530         return status;
6531 }
6532
6533 /*
6534  * Decode DELEGRETURN response
6535  */
6536 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6537                                     struct xdr_stream *xdr,
6538                                     struct nfs4_delegreturnres *res)
6539 {
6540         struct compound_hdr hdr;
6541         int status;
6542
6543         status = decode_compound_hdr(xdr, &hdr);
6544         if (status)
6545                 goto out;
6546         status = decode_sequence(xdr, &res->seq_res, rqstp);
6547         if (status)
6548                 goto out;
6549         status = decode_putfh(xdr);
6550         if (status != 0)
6551                 goto out;
6552         status = decode_delegreturn(xdr);
6553         if (status != 0)
6554                 goto out;
6555         decode_getfattr(xdr, res->fattr, res->server);
6556 out:
6557         return status;
6558 }
6559
6560 /*
6561  * Decode FS_LOCATIONS response
6562  */
6563 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6564                                      struct xdr_stream *xdr,
6565                                      struct nfs4_fs_locations_res *res)
6566 {
6567         struct compound_hdr hdr;
6568         int status;
6569
6570         status = decode_compound_hdr(xdr, &hdr);
6571         if (status)
6572                 goto out;
6573         status = decode_sequence(xdr, &res->seq_res, req);
6574         if (status)
6575                 goto out;
6576         status = decode_putfh(xdr);
6577         if (status)
6578                 goto out;
6579         status = decode_lookup(xdr);
6580         if (status)
6581                 goto out;
6582         xdr_enter_page(xdr, PAGE_SIZE);
6583         status = decode_getfattr(xdr, &res->fs_locations->fattr,
6584                                  res->fs_locations->server);
6585 out:
6586         return status;
6587 }
6588
6589 /*
6590  * Decode SECINFO response
6591  */
6592 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6593                                 struct xdr_stream *xdr,
6594                                 struct nfs4_secinfo_res *res)
6595 {
6596         struct compound_hdr hdr;
6597         int status;
6598
6599         status = decode_compound_hdr(xdr, &hdr);
6600         if (status)
6601                 goto out;
6602         status = decode_sequence(xdr, &res->seq_res, rqstp);
6603         if (status)
6604                 goto out;
6605         status = decode_putfh(xdr);
6606         if (status)
6607                 goto out;
6608         status = decode_secinfo(xdr, res);
6609 out:
6610         return status;
6611 }
6612
6613 #if defined(CONFIG_NFS_V4_1)
6614 /*
6615  * Decode EXCHANGE_ID response
6616  */
6617 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
6618                                     struct xdr_stream *xdr,
6619                                     void *res)
6620 {
6621         struct compound_hdr hdr;
6622         int status;
6623
6624         status = decode_compound_hdr(xdr, &hdr);
6625         if (!status)
6626                 status = decode_exchange_id(xdr, res);
6627         return status;
6628 }
6629
6630 /*
6631  * Decode CREATE_SESSION response
6632  */
6633 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
6634                                        struct xdr_stream *xdr,
6635                                        struct nfs41_create_session_res *res)
6636 {
6637         struct compound_hdr hdr;
6638         int status;
6639
6640         status = decode_compound_hdr(xdr, &hdr);
6641         if (!status)
6642                 status = decode_create_session(xdr, res);
6643         return status;
6644 }
6645
6646 /*
6647  * Decode DESTROY_SESSION response
6648  */
6649 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
6650                                         struct xdr_stream *xdr,
6651                                         void *res)
6652 {
6653         struct compound_hdr hdr;
6654         int status;
6655
6656         status = decode_compound_hdr(xdr, &hdr);
6657         if (!status)
6658                 status = decode_destroy_session(xdr, res);
6659         return status;
6660 }
6661
6662 /*
6663  * Decode SEQUENCE response
6664  */
6665 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
6666                                  struct xdr_stream *xdr,
6667                                  struct nfs4_sequence_res *res)
6668 {
6669         struct compound_hdr hdr;
6670         int status;
6671
6672         status = decode_compound_hdr(xdr, &hdr);
6673         if (!status)
6674                 status = decode_sequence(xdr, res, rqstp);
6675         return status;
6676 }
6677
6678 /*
6679  * Decode GET_LEASE_TIME response
6680  */
6681 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
6682                                        struct xdr_stream *xdr,
6683                                        struct nfs4_get_lease_time_res *res)
6684 {
6685         struct compound_hdr hdr;
6686         int status;
6687
6688         status = decode_compound_hdr(xdr, &hdr);
6689         if (!status)
6690                 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
6691         if (!status)
6692                 status = decode_putrootfh(xdr);
6693         if (!status)
6694                 status = decode_fsinfo(xdr, res->lr_fsinfo);
6695         return status;
6696 }
6697
6698 /*
6699  * Decode RECLAIM_COMPLETE response
6700  */
6701 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
6702                                          struct xdr_stream *xdr,
6703                                          struct nfs41_reclaim_complete_res *res)
6704 {
6705         struct compound_hdr hdr;
6706         int status;
6707
6708         status = decode_compound_hdr(xdr, &hdr);
6709         if (!status)
6710                 status = decode_sequence(xdr, &res->seq_res, rqstp);
6711         if (!status)
6712                 status = decode_reclaim_complete(xdr, (void *)NULL);
6713         return status;
6714 }
6715
6716 /*
6717  * Decode GETDEVICELIST response
6718  */
6719 static int nfs4_xdr_dec_getdevicelist(struct rpc_rqst *rqstp,
6720                                       struct xdr_stream *xdr,
6721                                       struct nfs4_getdevicelist_res *res)
6722 {
6723         struct compound_hdr hdr;
6724         int status;
6725
6726         dprintk("encoding getdevicelist!\n");
6727
6728         status = decode_compound_hdr(xdr, &hdr);
6729         if (status != 0)
6730                 goto out;
6731         status = decode_sequence(xdr, &res->seq_res, rqstp);
6732         if (status != 0)
6733                 goto out;
6734         status = decode_putfh(xdr);
6735         if (status != 0)
6736                 goto out;
6737         status = decode_getdevicelist(xdr, res->devlist);
6738 out:
6739         return status;
6740 }
6741
6742 /*
6743  * Decode GETDEVINFO response
6744  */
6745 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
6746                                       struct xdr_stream *xdr,
6747                                       struct nfs4_getdeviceinfo_res *res)
6748 {
6749         struct compound_hdr hdr;
6750         int status;
6751
6752         status = decode_compound_hdr(xdr, &hdr);
6753         if (status != 0)
6754                 goto out;
6755         status = decode_sequence(xdr, &res->seq_res, rqstp);
6756         if (status != 0)
6757                 goto out;
6758         status = decode_getdeviceinfo(xdr, res->pdev);
6759 out:
6760         return status;
6761 }
6762
6763 /*
6764  * Decode LAYOUTGET response
6765  */
6766 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
6767                                   struct xdr_stream *xdr,
6768                                   struct nfs4_layoutget_res *res)
6769 {
6770         struct compound_hdr hdr;
6771         int status;
6772
6773         status = decode_compound_hdr(xdr, &hdr);
6774         if (status)
6775                 goto out;
6776         status = decode_sequence(xdr, &res->seq_res, rqstp);
6777         if (status)
6778                 goto out;
6779         status = decode_putfh(xdr);
6780         if (status)
6781                 goto out;
6782         status = decode_layoutget(xdr, rqstp, res);
6783 out:
6784         return status;
6785 }
6786
6787 /*
6788  * Decode LAYOUTRETURN response
6789  */
6790 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
6791                                      struct xdr_stream *xdr,
6792                                      struct nfs4_layoutreturn_res *res)
6793 {
6794         struct compound_hdr hdr;
6795         int status;
6796
6797         status = decode_compound_hdr(xdr, &hdr);
6798         if (status)
6799                 goto out;
6800         status = decode_sequence(xdr, &res->seq_res, rqstp);
6801         if (status)
6802                 goto out;
6803         status = decode_putfh(xdr);
6804         if (status)
6805                 goto out;
6806         status = decode_layoutreturn(xdr, res);
6807 out:
6808         return status;
6809 }
6810
6811 /*
6812  * Decode LAYOUTCOMMIT response
6813  */
6814 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
6815                                      struct xdr_stream *xdr,
6816                                      struct nfs4_layoutcommit_res *res)
6817 {
6818         struct compound_hdr hdr;
6819         int status;
6820
6821         status = decode_compound_hdr(xdr, &hdr);
6822         if (status)
6823                 goto out;
6824         status = decode_sequence(xdr, &res->seq_res, rqstp);
6825         if (status)
6826                 goto out;
6827         status = decode_putfh(xdr);
6828         if (status)
6829                 goto out;
6830         status = decode_layoutcommit(xdr, rqstp, res);
6831         if (status)
6832                 goto out;
6833         decode_getfattr(xdr, res->fattr, res->server);
6834 out:
6835         return status;
6836 }
6837
6838 /*
6839  * Decode SECINFO_NO_NAME response
6840  */
6841 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
6842                                         struct xdr_stream *xdr,
6843                                         struct nfs4_secinfo_res *res)
6844 {
6845         struct compound_hdr hdr;
6846         int status;
6847
6848         status = decode_compound_hdr(xdr, &hdr);
6849         if (status)
6850                 goto out;
6851         status = decode_sequence(xdr, &res->seq_res, rqstp);
6852         if (status)
6853                 goto out;
6854         status = decode_putrootfh(xdr);
6855         if (status)
6856                 goto out;
6857         status = decode_secinfo(xdr, res);
6858 out:
6859         return status;
6860 }
6861
6862 /*
6863  * Decode TEST_STATEID response
6864  */
6865 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
6866                                      struct xdr_stream *xdr,
6867                                      struct nfs41_test_stateid_res *res)
6868 {
6869         struct compound_hdr hdr;
6870         int status;
6871
6872         status = decode_compound_hdr(xdr, &hdr);
6873         if (status)
6874                 goto out;
6875         status = decode_sequence(xdr, &res->seq_res, rqstp);
6876         if (status)
6877                 goto out;
6878         status = decode_test_stateid(xdr, res);
6879 out:
6880         return status;
6881 }
6882
6883 /*
6884  * Decode FREE_STATEID response
6885  */
6886 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
6887                                      struct xdr_stream *xdr,
6888                                      struct nfs41_free_stateid_res *res)
6889 {
6890         struct compound_hdr hdr;
6891         int status;
6892
6893         status = decode_compound_hdr(xdr, &hdr);
6894         if (status)
6895                 goto out;
6896         status = decode_sequence(xdr, &res->seq_res, rqstp);
6897         if (status)
6898                 goto out;
6899         status = decode_free_stateid(xdr, res);
6900 out:
6901         return status;
6902 }
6903 #endif /* CONFIG_NFS_V4_1 */
6904
6905 /**
6906  * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
6907  *                      the local page cache.
6908  * @xdr: XDR stream where entry resides
6909  * @entry: buffer to fill in with entry data
6910  * @plus: boolean indicating whether this should be a readdirplus entry
6911  *
6912  * Returns zero if successful, otherwise a negative errno value is
6913  * returned.
6914  *
6915  * This function is not invoked during READDIR reply decoding, but
6916  * rather whenever an application invokes the getdents(2) system call
6917  * on a directory already in our cache.
6918  */
6919 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
6920                        int plus)
6921 {
6922         uint32_t bitmap[3] = {0};
6923         uint32_t len;
6924         __be32 *p = xdr_inline_decode(xdr, 4);
6925         if (unlikely(!p))
6926                 goto out_overflow;
6927         if (*p == xdr_zero) {
6928                 p = xdr_inline_decode(xdr, 4);
6929                 if (unlikely(!p))
6930                         goto out_overflow;
6931                 if (*p == xdr_zero)
6932                         return -EAGAIN;
6933                 entry->eof = 1;
6934                 return -EBADCOOKIE;
6935         }
6936
6937         p = xdr_inline_decode(xdr, 12);
6938         if (unlikely(!p))
6939                 goto out_overflow;
6940         entry->prev_cookie = entry->cookie;
6941         p = xdr_decode_hyper(p, &entry->cookie);
6942         entry->len = be32_to_cpup(p);
6943
6944         p = xdr_inline_decode(xdr, entry->len);
6945         if (unlikely(!p))
6946                 goto out_overflow;
6947         entry->name = (const char *) p;
6948
6949         /*
6950          * In case the server doesn't return an inode number,
6951          * we fake one here.  (We don't use inode number 0,
6952          * since glibc seems to choke on it...)
6953          */
6954         entry->ino = 1;
6955         entry->fattr->valid = 0;
6956
6957         if (decode_attr_bitmap(xdr, bitmap) < 0)
6958                 goto out_overflow;
6959
6960         if (decode_attr_length(xdr, &len, &p) < 0)
6961                 goto out_overflow;
6962
6963         if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
6964                                         entry->server) < 0)
6965                 goto out_overflow;
6966         if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
6967                 entry->ino = entry->fattr->mounted_on_fileid;
6968         else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
6969                 entry->ino = entry->fattr->fileid;
6970
6971         entry->d_type = DT_UNKNOWN;
6972         if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
6973                 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
6974
6975         return 0;
6976
6977 out_overflow:
6978         print_overflow_msg(__func__, xdr);
6979         return -EAGAIN;
6980 }
6981
6982 /*
6983  * We need to translate between nfs status return values and
6984  * the local errno values which may not be the same.
6985  */
6986 static struct {
6987         int stat;
6988         int errno;
6989 } nfs_errtbl[] = {
6990         { NFS4_OK,              0               },
6991         { NFS4ERR_PERM,         -EPERM          },
6992         { NFS4ERR_NOENT,        -ENOENT         },
6993         { NFS4ERR_IO,           -errno_NFSERR_IO},
6994         { NFS4ERR_NXIO,         -ENXIO          },
6995         { NFS4ERR_ACCESS,       -EACCES         },
6996         { NFS4ERR_EXIST,        -EEXIST         },
6997         { NFS4ERR_XDEV,         -EXDEV          },
6998         { NFS4ERR_NOTDIR,       -ENOTDIR        },
6999         { NFS4ERR_ISDIR,        -EISDIR         },
7000         { NFS4ERR_INVAL,        -EINVAL         },
7001         { NFS4ERR_FBIG,         -EFBIG          },
7002         { NFS4ERR_NOSPC,        -ENOSPC         },
7003         { NFS4ERR_ROFS,         -EROFS          },
7004         { NFS4ERR_MLINK,        -EMLINK         },
7005         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
7006         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
7007         { NFS4ERR_DQUOT,        -EDQUOT         },
7008         { NFS4ERR_STALE,        -ESTALE         },
7009         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
7010         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
7011         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
7012         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
7013         { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
7014         { NFS4ERR_BADTYPE,      -EBADTYPE       },
7015         { NFS4ERR_LOCKED,       -EAGAIN         },
7016         { NFS4ERR_SYMLINK,      -ELOOP          },
7017         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
7018         { NFS4ERR_DEADLOCK,     -EDEADLK        },
7019         { -1,                   -EIO            }
7020 };
7021
7022 /*
7023  * Convert an NFS error code to a local one.
7024  * This one is used jointly by NFSv2 and NFSv3.
7025  */
7026 static int
7027 nfs4_stat_to_errno(int stat)
7028 {
7029         int i;
7030         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7031                 if (nfs_errtbl[i].stat == stat)
7032                         return nfs_errtbl[i].errno;
7033         }
7034         if (stat <= 10000 || stat > 10100) {
7035                 /* The server is looney tunes. */
7036                 return -EREMOTEIO;
7037         }
7038         /* If we cannot translate the error, the recovery routines should
7039          * handle it.
7040          * Note: remaining NFSv4 error codes have values > 10000, so should
7041          * not conflict with native Linux error codes.
7042          */
7043         return -stat;
7044 }
7045
7046 #define PROC(proc, argtype, restype)                            \
7047 [NFSPROC4_CLNT_##proc] = {                                      \
7048         .p_proc   = NFSPROC4_COMPOUND,                          \
7049         .p_encode = (kxdreproc_t)nfs4_xdr_##argtype,            \
7050         .p_decode = (kxdrdproc_t)nfs4_xdr_##restype,            \
7051         .p_arglen = NFS4_##argtype##_sz,                        \
7052         .p_replen = NFS4_##restype##_sz,                        \
7053         .p_statidx = NFSPROC4_CLNT_##proc,                      \
7054         .p_name   = #proc,                                      \
7055 }
7056
7057 struct rpc_procinfo     nfs4_procedures[] = {
7058         PROC(READ,              enc_read,               dec_read),
7059         PROC(WRITE,             enc_write,              dec_write),
7060         PROC(COMMIT,            enc_commit,             dec_commit),
7061         PROC(OPEN,              enc_open,               dec_open),
7062         PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
7063         PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
7064         PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
7065         PROC(CLOSE,             enc_close,              dec_close),
7066         PROC(SETATTR,           enc_setattr,            dec_setattr),
7067         PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
7068         PROC(RENEW,             enc_renew,              dec_renew),
7069         PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
7070         PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7071         PROC(LOCK,              enc_lock,               dec_lock),
7072         PROC(LOCKT,             enc_lockt,              dec_lockt),
7073         PROC(LOCKU,             enc_locku,              dec_locku),
7074         PROC(ACCESS,            enc_access,             dec_access),
7075         PROC(GETATTR,           enc_getattr,            dec_getattr),
7076         PROC(LOOKUP,            enc_lookup,             dec_lookup),
7077         PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
7078         PROC(REMOVE,            enc_remove,             dec_remove),
7079         PROC(RENAME,            enc_rename,             dec_rename),
7080         PROC(LINK,              enc_link,               dec_link),
7081         PROC(SYMLINK,           enc_symlink,            dec_symlink),
7082         PROC(CREATE,            enc_create,             dec_create),
7083         PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
7084         PROC(STATFS,            enc_statfs,             dec_statfs),
7085         PROC(READLINK,          enc_readlink,           dec_readlink),
7086         PROC(READDIR,           enc_readdir,            dec_readdir),
7087         PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
7088         PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
7089         PROC(GETACL,            enc_getacl,             dec_getacl),
7090         PROC(SETACL,            enc_setacl,             dec_setacl),
7091         PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
7092         PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
7093         PROC(SECINFO,           enc_secinfo,            dec_secinfo),
7094 #if defined(CONFIG_NFS_V4_1)
7095         PROC(EXCHANGE_ID,       enc_exchange_id,        dec_exchange_id),
7096         PROC(CREATE_SESSION,    enc_create_session,     dec_create_session),
7097         PROC(DESTROY_SESSION,   enc_destroy_session,    dec_destroy_session),
7098         PROC(SEQUENCE,          enc_sequence,           dec_sequence),
7099         PROC(GET_LEASE_TIME,    enc_get_lease_time,     dec_get_lease_time),
7100         PROC(RECLAIM_COMPLETE,  enc_reclaim_complete,   dec_reclaim_complete),
7101         PROC(GETDEVICEINFO,     enc_getdeviceinfo,      dec_getdeviceinfo),
7102         PROC(LAYOUTGET,         enc_layoutget,          dec_layoutget),
7103         PROC(LAYOUTCOMMIT,      enc_layoutcommit,       dec_layoutcommit),
7104         PROC(LAYOUTRETURN,      enc_layoutreturn,       dec_layoutreturn),
7105         PROC(SECINFO_NO_NAME,   enc_secinfo_no_name,    dec_secinfo_no_name),
7106         PROC(TEST_STATEID,      enc_test_stateid,       dec_test_stateid),
7107         PROC(FREE_STATEID,      enc_free_stateid,       dec_free_stateid),
7108         PROC(GETDEVICELIST,     enc_getdevicelist,      dec_getdevicelist),
7109 #endif /* CONFIG_NFS_V4_1 */
7110 };
7111
7112 struct rpc_version              nfs_version4 = {
7113         .number                 = 4,
7114         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
7115         .procs                  = nfs4_procedures
7116 };
7117
7118 /*
7119  * Local variables:
7120  *  c-basic-offset: 8
7121  * End:
7122  */