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