SAFE public projects git trees. - safe/jmp/linux-2.6/blob - fs/nfs/nfs4xdr.c

   1 /*
   2  *  fs/nfs/nfs4xdr.c
   3  *
   4  *  Client-side XDR for NFSv4.
   5  *
   6  *  Copyright (c) 2002 The Regents of the University of Michigan.
   7  *  All rights reserved.
   8  *
   9  *  Kendrick Smith <kmsmith@umich.edu>
  10  *  Andy Adamson   <andros@umich.edu>
  11  *
  12  *  Redistribution and use in source and binary forms, with or without
  13  *  modification, are permitted provided that the following conditions
  14  *  are met:
  15  *
  16  *  1. Redistributions of source code must retain the above copyright
  17  *     notice, this list of conditions and the following disclaimer.
  18  *  2. Redistributions in binary form must reproduce the above copyright
  19  *     notice, this list of conditions and the following disclaimer in the
  20  *     documentation and/or other materials provided with the distribution.
  21  *  3. Neither the name of the University nor the names of its
  22  *     contributors may be used to endorse or promote products derived
  23  *     from this software without specific prior written permission.
  24  *
  25  *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  26  *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  27  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  28  *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  29  *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30  *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31  *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  32  *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  33  *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  34  *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  35  *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 #include <linux/param.h>
  39 #include <linux/time.h>
  40 #include <linux/mm.h>
  41 #include <linux/slab.h>
  42 #include <linux/utsname.h>
  43 #include <linux/errno.h>
  44 #include <linux/string.h>
  45 #include <linux/in.h>
  46 #include <linux/pagemap.h>
  47 #include <linux/proc_fs.h>
  48 #include <linux/kdev_t.h>
  49 #include <linux/sunrpc/clnt.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
  56 #define NFSDBG_FACILITY         NFSDBG_XDR
  57
  58 /* Mapping from NFS error code to "errno" error code. */
  59 #define errno_NFSERR_IO         EIO
  60
  61 static int nfs4_stat_to_errno(int);
  62
  63 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
  64 #ifdef DEBUG
  65 #define NFS4_MAXTAGLEN          20
  66 #else
  67 #define NFS4_MAXTAGLEN          0
  68 #endif
  69
  70 /* lock,open owner id:
  71  * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT  >> 2)
  72  */
  73 #define open_owner_id_maxsz     (1 + 4)
  74 #define lock_owner_id_maxsz     (1 + 4)
  75 #define decode_lockowner_maxsz  (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  76 #define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  77 #define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  78 #define op_encode_hdr_maxsz     (1)
  79 #define op_decode_hdr_maxsz     (2)
  80 #define encode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  81 #define decode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  82 #define encode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  83 #define decode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  84 #define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
  85                                 (NFS4_FHSIZE >> 2))
  86 #define decode_putfh_maxsz      (op_decode_hdr_maxsz)
  87 #define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
  88 #define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
  89 #define encode_getfh_maxsz      (op_encode_hdr_maxsz)
  90 #define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
  91                                 ((3+NFS4_FHSIZE) >> 2))
  92 #define nfs4_fattr_bitmap_maxsz 3
  93 #define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
  94 #define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
  95 #define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
  96 #define nfs4_owner_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  97 #define nfs4_group_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  98 /* This is based on getfattr, which uses the most attributes: */
  99 #define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
 100                                 3 + 3 + 3 + nfs4_owner_maxsz + nfs4_group_maxsz))
 101 #define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
 102                                 nfs4_fattr_value_maxsz)
 103 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
 104 #define encode_attrs_maxsz      (nfs4_fattr_bitmap_maxsz + \
 105                                  1 + 2 + 1 + \
 106                                 nfs4_owner_maxsz + \
 107                                 nfs4_group_maxsz + \
 108                                 4 + 4)
 109 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
 110 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
 111 #define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
 112 #define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 113 #define encode_fsinfo_maxsz     (encode_getattr_maxsz)
 114 #define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + 11)
 115 #define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 116 #define decode_renew_maxsz      (op_decode_hdr_maxsz)
 117 #define encode_setclientid_maxsz \
 118                                 (op_encode_hdr_maxsz + \
 119                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 120                                 XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
 121                                 1 /* sc_prog */ + \
 122                                 XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 123                                 XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
 124                                 1) /* sc_cb_ident */
 125 #define decode_setclientid_maxsz \
 126                                 (op_decode_hdr_maxsz + \
 127                                 2 + \
 128                                 1024) /* large value for CLID_INUSE */
 129 #define encode_setclientid_confirm_maxsz \
 130                                 (op_encode_hdr_maxsz + \
 131                                 3 + (NFS4_VERIFIER_SIZE >> 2))
 132 #define decode_setclientid_confirm_maxsz \
 133                                 (op_decode_hdr_maxsz)
 134 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
 135 #define decode_lookup_maxsz     (op_decode_hdr_maxsz)
 136 #define encode_share_access_maxsz \
 137                                 (2)
 138 #define encode_createmode_maxsz (1 + encode_attrs_maxsz)
 139 #define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
 140 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
 141 #define encode_open_maxsz       (op_encode_hdr_maxsz + \
 142                                 2 + encode_share_access_maxsz + 2 + \
 143                                 open_owner_id_maxsz + \
 144                                 encode_opentype_maxsz + \
 145                                 encode_claim_null_maxsz)
 146 #define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
 147 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
 148                                 decode_ace_maxsz)
 149 #define decode_change_info_maxsz        (5)
 150 #define decode_open_maxsz       (op_decode_hdr_maxsz + \
 151                                 decode_stateid_maxsz + \
 152                                 decode_change_info_maxsz + 1 + \
 153                                 nfs4_fattr_bitmap_maxsz + \
 154                                 decode_delegation_maxsz)
 155 #define encode_open_confirm_maxsz \
 156                                 (op_encode_hdr_maxsz + \
 157                                  encode_stateid_maxsz + 1)
 158 #define decode_open_confirm_maxsz \
 159                                 (op_decode_hdr_maxsz + \
 160                                  decode_stateid_maxsz)
 161 #define encode_open_downgrade_maxsz \
 162                                 (op_encode_hdr_maxsz + \
 163                                  encode_stateid_maxsz + 1 + \
 164                                  encode_share_access_maxsz)
 165 #define decode_open_downgrade_maxsz \
 166                                 (op_decode_hdr_maxsz + \
 167                                  decode_stateid_maxsz)
 168 #define encode_close_maxsz      (op_encode_hdr_maxsz + \
 169                                  1 + encode_stateid_maxsz)
 170 #define decode_close_maxsz      (op_decode_hdr_maxsz + \
 171                                  decode_stateid_maxsz)
 172 #define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
 173                                  encode_stateid_maxsz + \
 174                                  encode_attrs_maxsz)
 175 #define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
 176                                  nfs4_fattr_bitmap_maxsz)
 177 #define encode_read_maxsz       (op_encode_hdr_maxsz + \
 178                                  encode_stateid_maxsz + 3)
 179 #define decode_read_maxsz       (op_decode_hdr_maxsz + 2)
 180 #define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
 181                                  2 + encode_verifier_maxsz + 5)
 182 #define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
 183                                  decode_verifier_maxsz)
 184 #define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 185 #define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1)
 186 #define encode_write_maxsz      (op_encode_hdr_maxsz + \
 187                                  encode_stateid_maxsz + 4)
 188 #define decode_write_maxsz      (op_decode_hdr_maxsz + \
 189                                  2 + decode_verifier_maxsz)
 190 #define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
 191 #define decode_commit_maxsz     (op_decode_hdr_maxsz + \
 192                                  decode_verifier_maxsz)
 193 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 194                                 nfs4_name_maxsz)
 195 #define decode_remove_maxsz     (op_decode_hdr_maxsz + \
 196                                  decode_change_info_maxsz)
 197 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 198                                 2 * nfs4_name_maxsz)
 199 #define decode_rename_maxsz     (op_decode_hdr_maxsz + \
 200                                  decode_change_info_maxsz + \
 201                                  decode_change_info_maxsz)
 202 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 203                                 nfs4_name_maxsz)
 204 #define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
 205 #define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 206                                  7 + \
 207                                  1 + encode_stateid_maxsz + 8)
 208 #define decode_lock_denied_maxsz \
 209                                 (8 + decode_lockowner_maxsz)
 210 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 211                                  decode_lock_denied_maxsz)
 212 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 12)
 213 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 214                                  decode_lock_denied_maxsz)
 215 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 216                                  encode_stateid_maxsz + \
 217                                  4)
 218 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 219                                  decode_stateid_maxsz)
 220 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 221 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 222 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 223                                 1 + nfs4_name_maxsz + \
 224                                 1 + \
 225                                 nfs4_fattr_maxsz)
 226 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 227 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 228                                 1 + 2 + nfs4_name_maxsz + \
 229                                 encode_attrs_maxsz)
 230 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
 231                                 decode_change_info_maxsz + \
 232                                 nfs4_fattr_bitmap_maxsz)
 233 #define encode_statfs_maxsz     (encode_getattr_maxsz)
 234 #define decode_statfs_maxsz     (decode_getattr_maxsz)
 235 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 236 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 237 #define encode_getacl_maxsz     (encode_getattr_maxsz)
 238 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 239                                  nfs4_fattr_bitmap_maxsz + 1)
 240 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 241                                  encode_stateid_maxsz + 3)
 242 #define decode_setacl_maxsz     (decode_setattr_maxsz)
 243 #define encode_fs_locations_maxsz \
 244                                 (encode_getattr_maxsz)
 245 #define decode_fs_locations_maxsz \
 246                                 (0)
 247
 248 #if defined(CONFIG_NFS_V4_1)
 249 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
 250                                 encode_verifier_maxsz + \
 251                                 1 /* co_ownerid.len */ + \
 252                                 XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
 253                                 1 /* flags */ + \
 254                                 1 /* spa_how */ + \
 255                                 0 /* SP4_NONE (for now) */ + \
 256                                 1 /* zero implemetation id array */)
 257 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
 258                                 2 /* eir_clientid */ + \
 259                                 1 /* eir_sequenceid */ + \
 260                                 1 /* eir_flags */ + \
 261                                 1 /* spr_how */ + \
 262                                 0 /* SP4_NONE (for now) */ + \
 263                                 2 /* eir_server_owner.so_minor_id */ + \
 264                                 /* eir_server_owner.so_major_id<> */ \
 265                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 266                                 /* eir_server_scope<> */ \
 267                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 268                                 1 /* eir_server_impl_id array length */ + \
 269                                 0 /* ignored eir_server_impl_id contents */)
 270 #define encode_sequence_maxsz   0 /* stub */
 271 #define decode_sequence_maxsz   0 /* stub */
 272 #else /* CONFIG_NFS_V4_1 */
 273 #define encode_sequence_maxsz   0
 274 #define decode_sequence_maxsz   0
 275 #endif /* CONFIG_NFS_V4_1 */
 276
 277 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 278 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 279 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 280                                 encode_sequence_maxsz + \
 281                                 encode_putfh_maxsz + \
 282                                 encode_read_maxsz)
 283 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 284                                 decode_sequence_maxsz + \
 285                                 decode_putfh_maxsz + \
 286                                 decode_read_maxsz)
 287 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 288                                 encode_sequence_maxsz + \
 289                                 encode_putfh_maxsz + \
 290                                 encode_readlink_maxsz)
 291 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 292                                 decode_sequence_maxsz + \
 293                                 decode_putfh_maxsz + \
 294                                 decode_readlink_maxsz)
 295 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 296                                 encode_sequence_maxsz + \
 297                                 encode_putfh_maxsz + \
 298                                 encode_readdir_maxsz)
 299 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 300                                 decode_sequence_maxsz + \
 301                                 decode_putfh_maxsz + \
 302                                 decode_readdir_maxsz)
 303 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 304                                 encode_sequence_maxsz + \
 305                                 encode_putfh_maxsz + \
 306                                 encode_write_maxsz + \
 307                                 encode_getattr_maxsz)
 308 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 309                                 decode_sequence_maxsz + \
 310                                 decode_putfh_maxsz + \
 311                                 decode_write_maxsz + \
 312                                 decode_getattr_maxsz)
 313 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 314                                 encode_sequence_maxsz + \
 315                                 encode_putfh_maxsz + \
 316                                 encode_commit_maxsz + \
 317                                 encode_getattr_maxsz)
 318 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 319                                 decode_sequence_maxsz + \
 320                                 decode_putfh_maxsz + \
 321                                 decode_commit_maxsz + \
 322                                 decode_getattr_maxsz)
 323 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 324                                 encode_sequence_maxsz + \
 325                                 encode_putfh_maxsz + \
 326                                 encode_savefh_maxsz + \
 327                                 encode_open_maxsz + \
 328                                 encode_getfh_maxsz + \
 329                                 encode_getattr_maxsz + \
 330                                 encode_restorefh_maxsz + \
 331                                 encode_getattr_maxsz)
 332 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 333                                 decode_sequence_maxsz + \
 334                                 decode_putfh_maxsz + \
 335                                 decode_savefh_maxsz + \
 336                                 decode_open_maxsz + \
 337                                 decode_getfh_maxsz + \
 338                                 decode_getattr_maxsz + \
 339                                 decode_restorefh_maxsz + \
 340                                 decode_getattr_maxsz)
 341 #define NFS4_enc_open_confirm_sz \
 342                                 (compound_encode_hdr_maxsz + \
 343                                  encode_putfh_maxsz + \
 344                                  encode_open_confirm_maxsz)
 345 #define NFS4_dec_open_confirm_sz \
 346                                 (compound_decode_hdr_maxsz + \
 347                                  decode_putfh_maxsz + \
 348                                  decode_open_confirm_maxsz)
 349 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 350                                         encode_sequence_maxsz + \
 351                                         encode_putfh_maxsz + \
 352                                         encode_open_maxsz + \
 353                                         encode_getattr_maxsz)
 354 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 355                                         decode_sequence_maxsz + \
 356                                         decode_putfh_maxsz + \
 357                                         decode_open_maxsz + \
 358                                         decode_getattr_maxsz)
 359 #define NFS4_enc_open_downgrade_sz \
 360                                 (compound_encode_hdr_maxsz + \
 361                                  encode_sequence_maxsz + \
 362                                  encode_putfh_maxsz + \
 363                                  encode_open_downgrade_maxsz + \
 364                                  encode_getattr_maxsz)
 365 #define NFS4_dec_open_downgrade_sz \
 366                                 (compound_decode_hdr_maxsz + \
 367                                  decode_sequence_maxsz + \
 368                                  decode_putfh_maxsz + \
 369                                  decode_open_downgrade_maxsz + \
 370                                  decode_getattr_maxsz)
 371 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 372                                  encode_sequence_maxsz + \
 373                                  encode_putfh_maxsz + \
 374                                  encode_close_maxsz + \
 375                                  encode_getattr_maxsz)
 376 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 377                                  decode_sequence_maxsz + \
 378                                  decode_putfh_maxsz + \
 379                                  decode_close_maxsz + \
 380                                  decode_getattr_maxsz)
 381 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 382                                  encode_sequence_maxsz + \
 383                                  encode_putfh_maxsz + \
 384                                  encode_setattr_maxsz + \
 385                                  encode_getattr_maxsz)
 386 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 387                                  decode_sequence_maxsz + \
 388                                  decode_putfh_maxsz + \
 389                                  decode_setattr_maxsz + \
 390                                  decode_getattr_maxsz)
 391 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 392                                 encode_sequence_maxsz + \
 393                                 encode_putfh_maxsz + \
 394                                 encode_fsinfo_maxsz)
 395 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 396                                 decode_sequence_maxsz + \
 397                                 decode_putfh_maxsz + \
 398                                 decode_fsinfo_maxsz)
 399 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 400                                 encode_renew_maxsz)
 401 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 402                                 decode_renew_maxsz)
 403 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 404                                 encode_setclientid_maxsz)
 405 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 406                                 decode_setclientid_maxsz)
 407 #define NFS4_enc_setclientid_confirm_sz \
 408                                 (compound_encode_hdr_maxsz + \
 409                                 encode_setclientid_confirm_maxsz + \
 410                                 encode_putrootfh_maxsz + \
 411                                 encode_fsinfo_maxsz)
 412 #define NFS4_dec_setclientid_confirm_sz \
 413                                 (compound_decode_hdr_maxsz + \
 414                                 decode_setclientid_confirm_maxsz + \
 415                                 decode_putrootfh_maxsz + \
 416                                 decode_fsinfo_maxsz)
 417 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 418                                 encode_sequence_maxsz + \
 419                                 encode_putfh_maxsz + \
 420                                 encode_lock_maxsz)
 421 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 422                                 decode_sequence_maxsz + \
 423                                 decode_putfh_maxsz + \
 424                                 decode_lock_maxsz)
 425 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 426                                 encode_sequence_maxsz + \
 427                                 encode_putfh_maxsz + \
 428                                 encode_lockt_maxsz)
 429 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 430                                  decode_sequence_maxsz + \
 431                                  decode_putfh_maxsz + \
 432                                  decode_lockt_maxsz)
 433 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 434                                 encode_sequence_maxsz + \
 435                                 encode_putfh_maxsz + \
 436                                 encode_locku_maxsz)
 437 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 438                                 decode_sequence_maxsz + \
 439                                 decode_putfh_maxsz + \
 440                                 decode_locku_maxsz)
 441 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 442                                 encode_sequence_maxsz + \
 443                                 encode_putfh_maxsz + \
 444                                 encode_access_maxsz + \
 445                                 encode_getattr_maxsz)
 446 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 447                                 decode_sequence_maxsz + \
 448                                 decode_putfh_maxsz + \
 449                                 decode_access_maxsz + \
 450                                 decode_getattr_maxsz)
 451 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 452                                 encode_sequence_maxsz + \
 453                                 encode_putfh_maxsz + \
 454                                 encode_getattr_maxsz)
 455 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 456                                 decode_sequence_maxsz + \
 457                                 decode_putfh_maxsz + \
 458                                 decode_getattr_maxsz)
 459 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 460                                 encode_sequence_maxsz + \
 461                                 encode_putfh_maxsz + \
 462                                 encode_lookup_maxsz + \
 463                                 encode_getattr_maxsz + \
 464                                 encode_getfh_maxsz)
 465 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 466                                 decode_sequence_maxsz + \
 467                                 decode_putfh_maxsz + \
 468                                 decode_lookup_maxsz + \
 469                                 decode_getattr_maxsz + \
 470                                 decode_getfh_maxsz)
 471 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 472                                 encode_sequence_maxsz + \
 473                                 encode_putrootfh_maxsz + \
 474                                 encode_getattr_maxsz + \
 475                                 encode_getfh_maxsz)
 476 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 477                                 decode_sequence_maxsz + \
 478                                 decode_putrootfh_maxsz + \
 479                                 decode_getattr_maxsz + \
 480                                 decode_getfh_maxsz)
 481 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 482                                 encode_sequence_maxsz + \
 483                                 encode_putfh_maxsz + \
 484                                 encode_remove_maxsz + \
 485                                 encode_getattr_maxsz)
 486 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 487                                 decode_sequence_maxsz + \
 488                                 decode_putfh_maxsz + \
 489                                 decode_remove_maxsz + \
 490                                 decode_getattr_maxsz)
 491 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 492                                 encode_sequence_maxsz + \
 493                                 encode_putfh_maxsz + \
 494                                 encode_savefh_maxsz + \
 495                                 encode_putfh_maxsz + \
 496                                 encode_rename_maxsz + \
 497                                 encode_getattr_maxsz + \
 498                                 encode_restorefh_maxsz + \
 499                                 encode_getattr_maxsz)
 500 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 501                                 decode_sequence_maxsz + \
 502                                 decode_putfh_maxsz + \
 503                                 decode_savefh_maxsz + \
 504                                 decode_putfh_maxsz + \
 505                                 decode_rename_maxsz + \
 506                                 decode_getattr_maxsz + \
 507                                 decode_restorefh_maxsz + \
 508                                 decode_getattr_maxsz)
 509 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 510                                 encode_sequence_maxsz + \
 511                                 encode_putfh_maxsz + \
 512                                 encode_savefh_maxsz + \
 513                                 encode_putfh_maxsz + \
 514                                 encode_link_maxsz + \
 515                                 decode_getattr_maxsz + \
 516                                 encode_restorefh_maxsz + \
 517                                 decode_getattr_maxsz)
 518 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 519                                 decode_sequence_maxsz + \
 520                                 decode_putfh_maxsz + \
 521                                 decode_savefh_maxsz + \
 522                                 decode_putfh_maxsz + \
 523                                 decode_link_maxsz + \
 524                                 decode_getattr_maxsz + \
 525                                 decode_restorefh_maxsz + \
 526                                 decode_getattr_maxsz)
 527 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 528                                 encode_sequence_maxsz + \
 529                                 encode_putfh_maxsz + \
 530                                 encode_symlink_maxsz + \
 531                                 encode_getattr_maxsz + \
 532                                 encode_getfh_maxsz)
 533 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 534                                 decode_sequence_maxsz + \
 535                                 decode_putfh_maxsz + \
 536                                 decode_symlink_maxsz + \
 537                                 decode_getattr_maxsz + \
 538                                 decode_getfh_maxsz)
 539 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 540                                 encode_sequence_maxsz + \
 541                                 encode_putfh_maxsz + \
 542                                 encode_savefh_maxsz + \
 543                                 encode_create_maxsz + \
 544                                 encode_getfh_maxsz + \
 545                                 encode_getattr_maxsz + \
 546                                 encode_restorefh_maxsz + \
 547                                 encode_getattr_maxsz)
 548 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 549                                 decode_sequence_maxsz + \
 550                                 decode_putfh_maxsz + \
 551                                 decode_savefh_maxsz + \
 552                                 decode_create_maxsz + \
 553                                 decode_getfh_maxsz + \
 554                                 decode_getattr_maxsz + \
 555                                 decode_restorefh_maxsz + \
 556                                 decode_getattr_maxsz)
 557 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 558                                 encode_sequence_maxsz + \
 559                                 encode_putfh_maxsz + \
 560                                 encode_getattr_maxsz)
 561 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 562                                 decode_sequence_maxsz + \
 563                                 decode_putfh_maxsz + \
 564                                 decode_getattr_maxsz)
 565 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 566                                 encode_sequence_maxsz + \
 567                                 encode_putfh_maxsz + \
 568                                 encode_statfs_maxsz)
 569 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 570                                 decode_sequence_maxsz + \
 571                                 decode_putfh_maxsz + \
 572                                 decode_statfs_maxsz)
 573 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 574                                 encode_sequence_maxsz + \
 575                                 encode_putfh_maxsz + \
 576                                 encode_getattr_maxsz)
 577 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 578                                 decode_sequence_maxsz + \
 579                                 decode_putfh_maxsz + \
 580                                 decode_getattr_maxsz)
 581 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 582                                 encode_sequence_maxsz + \
 583                                 encode_putfh_maxsz + \
 584                                 encode_delegreturn_maxsz + \
 585                                 encode_getattr_maxsz)
 586 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 587                                 decode_sequence_maxsz + \
 588                                 decode_delegreturn_maxsz + \
 589                                 decode_getattr_maxsz)
 590 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 591                                 encode_sequence_maxsz + \
 592                                 encode_putfh_maxsz + \
 593                                 encode_getacl_maxsz)
 594 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 595                                 decode_sequence_maxsz + \
 596                                 decode_putfh_maxsz + \
 597                                 decode_getacl_maxsz)
 598 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 599                                 encode_sequence_maxsz + \
 600                                 encode_putfh_maxsz + \
 601                                 encode_setacl_maxsz)
 602 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 603                                 decode_sequence_maxsz + \
 604                                 decode_putfh_maxsz + \
 605                                 decode_setacl_maxsz)
 606 #define NFS4_enc_fs_locations_sz \
 607                                 (compound_encode_hdr_maxsz + \
 608                                  encode_sequence_maxsz + \
 609                                  encode_putfh_maxsz + \
 610                                  encode_lookup_maxsz + \
 611                                  encode_fs_locations_maxsz)
 612 #define NFS4_dec_fs_locations_sz \
 613                                 (compound_decode_hdr_maxsz + \
 614                                  decode_sequence_maxsz + \
 615                                  decode_putfh_maxsz + \
 616                                  decode_lookup_maxsz + \
 617                                  decode_fs_locations_maxsz)
 618 #if defined(CONFIG_NFS_V4_1)
 619 #define NFS4_enc_exchange_id_sz \
 620                                 (compound_encode_hdr_maxsz + \
 621                                  encode_exchange_id_maxsz)
 622 #define NFS4_dec_exchange_id_sz \
 623                                 (compound_decode_hdr_maxsz + \
 624                                  decode_exchange_id_maxsz)
 625 #define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
 626                                          encode_sequence_maxsz + \
 627                                          encode_putrootfh_maxsz + \
 628                                          encode_fsinfo_maxsz)
 629 #define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
 630                                          decode_sequence_maxsz + \
 631                                          decode_putrootfh_maxsz + \
 632                                          decode_fsinfo_maxsz)
 633 #endif /* CONFIG_NFS_V4_1 */
 634
 635 static const umode_t nfs_type2fmt[] = {
 636         [NF4BAD] = 0,
 637         [NF4REG] = S_IFREG,
 638         [NF4DIR] = S_IFDIR,
 639         [NF4BLK] = S_IFBLK,
 640         [NF4CHR] = S_IFCHR,
 641         [NF4LNK] = S_IFLNK,
 642         [NF4SOCK] = S_IFSOCK,
 643         [NF4FIFO] = S_IFIFO,
 644         [NF4ATTRDIR] = 0,
 645         [NF4NAMEDATTR] = 0,
 646 };
 647
 648 struct compound_hdr {
 649         int32_t         status;
 650         uint32_t        nops;
 651         __be32 *        nops_p;
 652         uint32_t        taglen;
 653         char *          tag;
 654         uint32_t        replen;         /* expected reply words */
 655         u32             minorversion;
 656 };
 657
 658 /*
 659  * START OF "GENERIC" ENCODE ROUTINES.
 660  *   These may look a little ugly since they are imported from a "generic"
 661  * set of XDR encode/decode routines which are intended to be shared by
 662  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
 663  *
 664  * If the pain of reading these is too great, it should be a straightforward
 665  * task to translate them into Linux-specific versions which are more
 666  * consistent with the style used in NFSv2/v3...
 667  */
 668 #define WRITE32(n)               *p++ = htonl(n)
 669 #define WRITE64(n)               do {                           \
 670         *p++ = htonl((uint32_t)((n) >> 32));                            \
 671         *p++ = htonl((uint32_t)(n));                                    \
 672 } while (0)
 673 #define WRITEMEM(ptr,nbytes)     do {                           \
 674         p = xdr_encode_opaque_fixed(p, ptr, nbytes);            \
 675 } while (0)
 676
 677 #define RESERVE_SPACE(nbytes)   do {                            \
 678         p = xdr_reserve_space(xdr, nbytes);                     \
 679         BUG_ON(!p);                                             \
 680 } while (0)
 681
 682 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 683 {
 684         __be32 *p;
 685
 686         p = xdr_reserve_space(xdr, 4 + len);
 687         BUG_ON(p == NULL);
 688         xdr_encode_opaque(p, str, len);
 689 }
 690
 691 static void encode_compound_hdr(struct xdr_stream *xdr,
 692                                 struct rpc_rqst *req,
 693                                 struct compound_hdr *hdr)
 694 {
 695         __be32 *p;
 696         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
 697
 698         /* initialize running count of expected bytes in reply.
 699          * NOTE: the replied tag SHOULD be the same is the one sent,
 700          * but this is not required as a MUST for the server to do so. */
 701         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
 702
 703         dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
 704         BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
 705         RESERVE_SPACE(12+(XDR_QUADLEN(hdr->taglen)<<2));
 706         WRITE32(hdr->taglen);
 707         WRITEMEM(hdr->tag, hdr->taglen);
 708         WRITE32(hdr->minorversion);
 709         hdr->nops_p = p;
 710         WRITE32(hdr->nops);
 711 }
 712
 713 static void encode_nops(struct compound_hdr *hdr)
 714 {
 715         *hdr->nops_p = htonl(hdr->nops);
 716 }
 717
 718 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 719 {
 720         __be32 *p;
 721
 722         p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
 723         BUG_ON(p == NULL);
 724         xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
 725 }
 726
 727 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
 728 {
 729         char owner_name[IDMAP_NAMESZ];
 730         char owner_group[IDMAP_NAMESZ];
 731         int owner_namelen = 0;
 732         int owner_grouplen = 0;
 733         __be32 *p;
 734         __be32 *q;
 735         int len;
 736         uint32_t bmval0 = 0;
 737         uint32_t bmval1 = 0;
 738
 739         /*
 740          * We reserve enough space to write the entire attribute buffer at once.
 741          * In the worst-case, this would be
 742          *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
 743          *          = 36 bytes, plus any contribution from variable-length fields
 744          *            such as owner/group.
 745          */
 746         len = 16;
 747
 748         /* Sigh */
 749         if (iap->ia_valid & ATTR_SIZE)
 750                 len += 8;
 751         if (iap->ia_valid & ATTR_MODE)
 752                 len += 4;
 753         if (iap->ia_valid & ATTR_UID) {
 754                 owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name);
 755                 if (owner_namelen < 0) {
 756                         dprintk("nfs: couldn't resolve uid %d to string\n",
 757                                         iap->ia_uid);
 758                         /* XXX */
 759                         strcpy(owner_name, "nobody");
 760                         owner_namelen = sizeof("nobody") - 1;
 761                         /* goto out; */
 762                 }
 763                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
 764         }
 765         if (iap->ia_valid & ATTR_GID) {
 766                 owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group);
 767                 if (owner_grouplen < 0) {
 768                         dprintk("nfs: couldn't resolve gid %d to string\n",
 769                                         iap->ia_gid);
 770                         strcpy(owner_group, "nobody");
 771                         owner_grouplen = sizeof("nobody") - 1;
 772                         /* goto out; */
 773                 }
 774                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
 775         }
 776         if (iap->ia_valid & ATTR_ATIME_SET)
 777                 len += 16;
 778         else if (iap->ia_valid & ATTR_ATIME)
 779                 len += 4;
 780         if (iap->ia_valid & ATTR_MTIME_SET)
 781                 len += 16;
 782         else if (iap->ia_valid & ATTR_MTIME)
 783                 len += 4;
 784         RESERVE_SPACE(len);
 785
 786         /*
 787          * We write the bitmap length now, but leave the bitmap and the attribute
 788          * buffer length to be backfilled at the end of this routine.
 789          */
 790         WRITE32(2);
 791         q = p;
 792         p += 3;
 793
 794         if (iap->ia_valid & ATTR_SIZE) {
 795                 bmval0 |= FATTR4_WORD0_SIZE;
 796                 WRITE64(iap->ia_size);
 797         }
 798         if (iap->ia_valid & ATTR_MODE) {
 799                 bmval1 |= FATTR4_WORD1_MODE;
 800                 WRITE32(iap->ia_mode & S_IALLUGO);
 801         }
 802         if (iap->ia_valid & ATTR_UID) {
 803                 bmval1 |= FATTR4_WORD1_OWNER;
 804                 WRITE32(owner_namelen);
 805                 WRITEMEM(owner_name, owner_namelen);
 806         }
 807         if (iap->ia_valid & ATTR_GID) {
 808                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
 809                 WRITE32(owner_grouplen);
 810                 WRITEMEM(owner_group, owner_grouplen);
 811         }
 812         if (iap->ia_valid & ATTR_ATIME_SET) {
 813                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 814                 WRITE32(NFS4_SET_TO_CLIENT_TIME);
 815                 WRITE32(0);
 816                 WRITE32(iap->ia_mtime.tv_sec);
 817                 WRITE32(iap->ia_mtime.tv_nsec);
 818         }
 819         else if (iap->ia_valid & ATTR_ATIME) {
 820                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 821                 WRITE32(NFS4_SET_TO_SERVER_TIME);
 822         }
 823         if (iap->ia_valid & ATTR_MTIME_SET) {
 824                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 825                 WRITE32(NFS4_SET_TO_CLIENT_TIME);
 826                 WRITE32(0);
 827                 WRITE32(iap->ia_mtime.tv_sec);
 828                 WRITE32(iap->ia_mtime.tv_nsec);
 829         }
 830         else if (iap->ia_valid & ATTR_MTIME) {
 831                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 832                 WRITE32(NFS4_SET_TO_SERVER_TIME);
 833         }
 834
 835         /*
 836          * Now we backfill the bitmap and the attribute buffer length.
 837          */
 838         if (len != ((char *)p - (char *)q) + 4) {
 839                 printk(KERN_ERR "nfs: Attr length error, %u != %Zu\n",
 840                                 len, ((char *)p - (char *)q) + 4);
 841                 BUG();
 842         }
 843         len = (char *)p - (char *)q - 12;
 844         *q++ = htonl(bmval0);
 845         *q++ = htonl(bmval1);
 846         *q++ = htonl(len);
 847
 848 /* out: */
 849 }
 850
 851 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
 852 {
 853         __be32 *p;
 854
 855         RESERVE_SPACE(8);
 856         WRITE32(OP_ACCESS);
 857         WRITE32(access);
 858         hdr->nops++;
 859         hdr->replen += decode_access_maxsz;
 860 }
 861
 862 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
 863 {
 864         __be32 *p;
 865
 866         RESERVE_SPACE(8+NFS4_STATEID_SIZE);
 867         WRITE32(OP_CLOSE);
 868         WRITE32(arg->seqid->sequence->counter);
 869         WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
 870         hdr->nops++;
 871         hdr->replen += decode_close_maxsz;
 872 }
 873
 874 static void encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
 875 {
 876         __be32 *p;
 877
 878         RESERVE_SPACE(16);
 879         WRITE32(OP_COMMIT);
 880         WRITE64(args->offset);
 881         WRITE32(args->count);
 882         hdr->nops++;
 883         hdr->replen += decode_commit_maxsz;
 884 }
 885
 886 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
 887 {
 888         __be32 *p;
 889
 890         RESERVE_SPACE(8);
 891         WRITE32(OP_CREATE);
 892         WRITE32(create->ftype);
 893
 894         switch (create->ftype) {
 895         case NF4LNK:
 896                 RESERVE_SPACE(4);
 897                 WRITE32(create->u.symlink.len);
 898                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
 899                 break;
 900
 901         case NF4BLK: case NF4CHR:
 902                 RESERVE_SPACE(8);
 903                 WRITE32(create->u.device.specdata1);
 904                 WRITE32(create->u.device.specdata2);
 905                 break;
 906
 907         default:
 908                 break;
 909         }
 910
 911         RESERVE_SPACE(4 + create->name->len);
 912         WRITE32(create->name->len);
 913         WRITEMEM(create->name->name, create->name->len);
 914         hdr->nops++;
 915         hdr->replen += decode_create_maxsz;
 916
 917         encode_attrs(xdr, create->attrs, create->server);
 918 }
 919
 920 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
 921 {
 922         __be32 *p;
 923
 924         RESERVE_SPACE(12);
 925         WRITE32(OP_GETATTR);
 926         WRITE32(1);
 927         WRITE32(bitmap);
 928         hdr->nops++;
 929         hdr->replen += decode_getattr_maxsz;
 930 }
 931
 932 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
 933 {
 934         __be32 *p;
 935
 936         RESERVE_SPACE(16);
 937         WRITE32(OP_GETATTR);
 938         WRITE32(2);
 939         WRITE32(bm0);
 940         WRITE32(bm1);
 941         hdr->nops++;
 942         hdr->replen += decode_getattr_maxsz;
 943 }
 944
 945 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
 946 {
 947         encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
 948                            bitmask[1] & nfs4_fattr_bitmap[1], hdr);
 949 }
 950
 951 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
 952 {
 953         encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
 954                            bitmask[1] & nfs4_fsinfo_bitmap[1], hdr);
 955 }
 956
 957 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
 958 {
 959         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
 960                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
 961 }
 962
 963 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
 964 {
 965         __be32 *p;
 966
 967         RESERVE_SPACE(4);
 968         WRITE32(OP_GETFH);
 969         hdr->nops++;
 970         hdr->replen += decode_getfh_maxsz;
 971 }
 972
 973 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
 974 {
 975         __be32 *p;
 976
 977         RESERVE_SPACE(8 + name->len);
 978         WRITE32(OP_LINK);
 979         WRITE32(name->len);
 980         WRITEMEM(name->name, name->len);
 981         hdr->nops++;
 982         hdr->replen += decode_link_maxsz;
 983 }
 984
 985 static inline int nfs4_lock_type(struct file_lock *fl, int block)
 986 {
 987         if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
 988                 return block ? NFS4_READW_LT : NFS4_READ_LT;
 989         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
 990 }
 991
 992 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
 993 {
 994         if (fl->fl_end == OFFSET_MAX)
 995                 return ~(uint64_t)0;
 996         return fl->fl_end - fl->fl_start + 1;
 997 }
 998
 999 /*
1000  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1001  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1002  */
1003 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1004 {
1005         __be32 *p;
1006
1007         RESERVE_SPACE(32);
1008         WRITE32(OP_LOCK);
1009         WRITE32(nfs4_lock_type(args->fl, args->block));
1010         WRITE32(args->reclaim);
1011         WRITE64(args->fl->fl_start);
1012         WRITE64(nfs4_lock_length(args->fl));
1013         WRITE32(args->new_lock_owner);
1014         if (args->new_lock_owner){
1015                 RESERVE_SPACE(4+NFS4_STATEID_SIZE+32);
1016                 WRITE32(args->open_seqid->sequence->counter);
1017                 WRITEMEM(args->open_stateid->data, NFS4_STATEID_SIZE);
1018                 WRITE32(args->lock_seqid->sequence->counter);
1019                 WRITE64(args->lock_owner.clientid);
1020                 WRITE32(16);
1021                 WRITEMEM("lock id:", 8);
1022                 WRITE64(args->lock_owner.id);
1023         }
1024         else {
1025                 RESERVE_SPACE(NFS4_STATEID_SIZE+4);
1026                 WRITEMEM(args->lock_stateid->data, NFS4_STATEID_SIZE);
1027                 WRITE32(args->lock_seqid->sequence->counter);
1028         }
1029         hdr->nops++;
1030         hdr->replen += decode_lock_maxsz;
1031 }
1032
1033 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1034 {
1035         __be32 *p;
1036
1037         RESERVE_SPACE(52);
1038         WRITE32(OP_LOCKT);
1039         WRITE32(nfs4_lock_type(args->fl, 0));
1040         WRITE64(args->fl->fl_start);
1041         WRITE64(nfs4_lock_length(args->fl));
1042         WRITE64(args->lock_owner.clientid);
1043         WRITE32(16);
1044         WRITEMEM("lock id:", 8);
1045         WRITE64(args->lock_owner.id);
1046         hdr->nops++;
1047         hdr->replen += decode_lockt_maxsz;
1048 }
1049
1050 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1051 {
1052         __be32 *p;
1053
1054         RESERVE_SPACE(12+NFS4_STATEID_SIZE+16);
1055         WRITE32(OP_LOCKU);
1056         WRITE32(nfs4_lock_type(args->fl, 0));
1057         WRITE32(args->seqid->sequence->counter);
1058         WRITEMEM(args->stateid->data, NFS4_STATEID_SIZE);
1059         WRITE64(args->fl->fl_start);
1060         WRITE64(nfs4_lock_length(args->fl));
1061         hdr->nops++;
1062         hdr->replen += decode_locku_maxsz;
1063 }
1064
1065 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1066 {
1067         int len = name->len;
1068         __be32 *p;
1069
1070         RESERVE_SPACE(8 + len);
1071         WRITE32(OP_LOOKUP);
1072         WRITE32(len);
1073         WRITEMEM(name->name, len);
1074         hdr->nops++;
1075         hdr->replen += decode_lookup_maxsz;
1076 }
1077
1078 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1079 {
1080         __be32 *p;
1081
1082         RESERVE_SPACE(8);
1083         switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1084         case FMODE_READ:
1085                 WRITE32(NFS4_SHARE_ACCESS_READ);
1086                 break;
1087         case FMODE_WRITE:
1088                 WRITE32(NFS4_SHARE_ACCESS_WRITE);
1089                 break;
1090         case FMODE_READ|FMODE_WRITE:
1091                 WRITE32(NFS4_SHARE_ACCESS_BOTH);
1092                 break;
1093         default:
1094                 WRITE32(0);
1095         }
1096         WRITE32(0);             /* for linux, share_deny = 0 always */
1097 }
1098
1099 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1100 {
1101         __be32 *p;
1102  /*
1103  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1104  * owner 4 = 32
1105  */
1106         RESERVE_SPACE(8);
1107         WRITE32(OP_OPEN);
1108         WRITE32(arg->seqid->sequence->counter);
1109         encode_share_access(xdr, arg->fmode);
1110         RESERVE_SPACE(28);
1111         WRITE64(arg->clientid);
1112         WRITE32(16);
1113         WRITEMEM("open id:", 8);
1114         WRITE64(arg->id);
1115 }
1116
1117 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1118 {
1119         __be32 *p;
1120
1121         RESERVE_SPACE(4);
1122         switch(arg->open_flags & O_EXCL) {
1123         case 0:
1124                 WRITE32(NFS4_CREATE_UNCHECKED);
1125                 encode_attrs(xdr, arg->u.attrs, arg->server);
1126                 break;
1127         default:
1128                 WRITE32(NFS4_CREATE_EXCLUSIVE);
1129                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1130         }
1131 }
1132
1133 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1134 {
1135         __be32 *p;
1136
1137         RESERVE_SPACE(4);
1138         switch (arg->open_flags & O_CREAT) {
1139         case 0:
1140                 WRITE32(NFS4_OPEN_NOCREATE);
1141                 break;
1142         default:
1143                 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1144                 WRITE32(NFS4_OPEN_CREATE);
1145                 encode_createmode(xdr, arg);
1146         }
1147 }
1148
1149 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1150 {
1151         __be32 *p;
1152
1153         RESERVE_SPACE(4);
1154         switch (delegation_type) {
1155         case 0:
1156                 WRITE32(NFS4_OPEN_DELEGATE_NONE);
1157                 break;
1158         case FMODE_READ:
1159                 WRITE32(NFS4_OPEN_DELEGATE_READ);
1160                 break;
1161         case FMODE_WRITE|FMODE_READ:
1162                 WRITE32(NFS4_OPEN_DELEGATE_WRITE);
1163                 break;
1164         default:
1165                 BUG();
1166         }
1167 }
1168
1169 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1170 {
1171         __be32 *p;
1172
1173         RESERVE_SPACE(4);
1174         WRITE32(NFS4_OPEN_CLAIM_NULL);
1175         encode_string(xdr, name->len, name->name);
1176 }
1177
1178 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1179 {
1180         __be32 *p;
1181
1182         RESERVE_SPACE(4);
1183         WRITE32(NFS4_OPEN_CLAIM_PREVIOUS);
1184         encode_delegation_type(xdr, type);
1185 }
1186
1187 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1188 {
1189         __be32 *p;
1190
1191         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1192         WRITE32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1193         WRITEMEM(stateid->data, NFS4_STATEID_SIZE);
1194         encode_string(xdr, name->len, name->name);
1195 }
1196
1197 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1198 {
1199         encode_openhdr(xdr, arg);
1200         encode_opentype(xdr, arg);
1201         switch (arg->claim) {
1202         case NFS4_OPEN_CLAIM_NULL:
1203                 encode_claim_null(xdr, arg->name);
1204                 break;
1205         case NFS4_OPEN_CLAIM_PREVIOUS:
1206                 encode_claim_previous(xdr, arg->u.delegation_type);
1207                 break;
1208         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1209                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1210                 break;
1211         default:
1212                 BUG();
1213         }
1214         hdr->nops++;
1215         hdr->replen += decode_open_maxsz;
1216 }
1217
1218 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1219 {
1220         __be32 *p;
1221
1222         RESERVE_SPACE(4+NFS4_STATEID_SIZE+4);
1223         WRITE32(OP_OPEN_CONFIRM);
1224         WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
1225         WRITE32(arg->seqid->sequence->counter);
1226         hdr->nops++;
1227         hdr->replen += decode_open_confirm_maxsz;
1228 }
1229
1230 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1231 {
1232         __be32 *p;
1233
1234         RESERVE_SPACE(4+NFS4_STATEID_SIZE+4);
1235         WRITE32(OP_OPEN_DOWNGRADE);
1236         WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
1237         WRITE32(arg->seqid->sequence->counter);
1238         encode_share_access(xdr, arg->fmode);
1239         hdr->nops++;
1240         hdr->replen += decode_open_downgrade_maxsz;
1241 }
1242
1243 static void
1244 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1245 {
1246         int len = fh->size;
1247         __be32 *p;
1248
1249         RESERVE_SPACE(8 + len);
1250         WRITE32(OP_PUTFH);
1251         WRITE32(len);
1252         WRITEMEM(fh->data, len);
1253         hdr->nops++;
1254         hdr->replen += decode_putfh_maxsz;
1255 }
1256
1257 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1258 {
1259         __be32 *p;
1260
1261         RESERVE_SPACE(4);
1262         WRITE32(OP_PUTROOTFH);
1263         hdr->nops++;
1264         hdr->replen += decode_putrootfh_maxsz;
1265 }
1266
1267 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx)
1268 {
1269         nfs4_stateid stateid;
1270         __be32 *p;
1271
1272         RESERVE_SPACE(NFS4_STATEID_SIZE);
1273         if (ctx->state != NULL) {
1274                 nfs4_copy_stateid(&stateid, ctx->state, ctx->lockowner);
1275                 WRITEMEM(stateid.data, NFS4_STATEID_SIZE);
1276         } else
1277                 WRITEMEM(zero_stateid.data, NFS4_STATEID_SIZE);
1278 }
1279
1280 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1281 {
1282         __be32 *p;
1283
1284         RESERVE_SPACE(4);
1285         WRITE32(OP_READ);
1286
1287         encode_stateid(xdr, args->context);
1288
1289         RESERVE_SPACE(12);
1290         WRITE64(args->offset);
1291         WRITE32(args->count);
1292         hdr->nops++;
1293         hdr->replen += decode_read_maxsz;
1294 }
1295
1296 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1297 {
1298         uint32_t attrs[2] = {
1299                 FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID,
1300                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1301         };
1302         __be32 *p;
1303
1304         RESERVE_SPACE(12+NFS4_VERIFIER_SIZE+20);
1305         WRITE32(OP_READDIR);
1306         WRITE64(readdir->cookie);
1307         WRITEMEM(readdir->verifier.data, NFS4_VERIFIER_SIZE);
1308         WRITE32(readdir->count >> 1);  /* We're not doing readdirplus */
1309         WRITE32(readdir->count);
1310         WRITE32(2);
1311         /* Switch to mounted_on_fileid if the server supports it */
1312         if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
1313                 attrs[0] &= ~FATTR4_WORD0_FILEID;
1314         else
1315                 attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
1316         WRITE32(attrs[0] & readdir->bitmask[0]);
1317         WRITE32(attrs[1] & readdir->bitmask[1]);
1318         hdr->nops++;
1319         hdr->replen += decode_readdir_maxsz;
1320         dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1321                         __func__,
1322                         (unsigned long long)readdir->cookie,
1323                         ((u32 *)readdir->verifier.data)[0],
1324                         ((u32 *)readdir->verifier.data)[1],
1325                         attrs[0] & readdir->bitmask[0],
1326                         attrs[1] & readdir->bitmask[1]);
1327 }
1328
1329 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1330 {
1331         __be32 *p;
1332
1333         RESERVE_SPACE(4);
1334         WRITE32(OP_READLINK);
1335         hdr->nops++;
1336         hdr->replen += decode_readlink_maxsz;
1337 }
1338
1339 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1340 {
1341         __be32 *p;
1342
1343         RESERVE_SPACE(8 + name->len);
1344         WRITE32(OP_REMOVE);
1345         WRITE32(name->len);
1346         WRITEMEM(name->name, name->len);
1347         hdr->nops++;
1348         hdr->replen += decode_remove_maxsz;
1349 }
1350
1351 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1352 {
1353         __be32 *p;
1354
1355         RESERVE_SPACE(8 + oldname->len);
1356         WRITE32(OP_RENAME);
1357         WRITE32(oldname->len);
1358         WRITEMEM(oldname->name, oldname->len);
1359
1360         RESERVE_SPACE(4 + newname->len);
1361         WRITE32(newname->len);
1362         WRITEMEM(newname->name, newname->len);
1363         hdr->nops++;
1364         hdr->replen += decode_rename_maxsz;
1365 }
1366
1367 static void encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid, struct compound_hdr *hdr)
1368 {
1369         __be32 *p;
1370
1371         RESERVE_SPACE(12);
1372         WRITE32(OP_RENEW);
1373         WRITE64(client_stateid->cl_clientid);
1374         hdr->nops++;
1375         hdr->replen += decode_renew_maxsz;
1376 }
1377
1378 static void
1379 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1380 {
1381         __be32 *p;
1382
1383         RESERVE_SPACE(4);
1384         WRITE32(OP_RESTOREFH);
1385         hdr->nops++;
1386         hdr->replen += decode_restorefh_maxsz;
1387 }
1388
1389 static int
1390 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1391 {
1392         __be32 *p;
1393
1394         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1395         WRITE32(OP_SETATTR);
1396         WRITEMEM(zero_stateid.data, NFS4_STATEID_SIZE);
1397         RESERVE_SPACE(2*4);
1398         WRITE32(1);
1399         WRITE32(FATTR4_WORD0_ACL);
1400         if (arg->acl_len % 4)
1401                 return -EINVAL;
1402         RESERVE_SPACE(4);
1403         WRITE32(arg->acl_len);
1404         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1405         hdr->nops++;
1406         hdr->replen += decode_setacl_maxsz;
1407         return 0;
1408 }
1409
1410 static void
1411 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1412 {
1413         __be32 *p;
1414
1415         RESERVE_SPACE(4);
1416         WRITE32(OP_SAVEFH);
1417         hdr->nops++;
1418         hdr->replen += decode_savefh_maxsz;
1419 }
1420
1421 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1422 {
1423         __be32 *p;
1424
1425         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1426         WRITE32(OP_SETATTR);
1427         WRITEMEM(arg->stateid.data, NFS4_STATEID_SIZE);
1428         hdr->nops++;
1429         hdr->replen += decode_setattr_maxsz;
1430         encode_attrs(xdr, arg->iap, server);
1431 }
1432
1433 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1434 {
1435         __be32 *p;
1436
1437         RESERVE_SPACE(4 + NFS4_VERIFIER_SIZE);
1438         WRITE32(OP_SETCLIENTID);
1439         WRITEMEM(setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
1440
1441         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1442         RESERVE_SPACE(4);
1443         WRITE32(setclientid->sc_prog);
1444         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1445         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1446         RESERVE_SPACE(4);
1447         WRITE32(setclientid->sc_cb_ident);
1448         hdr->nops++;
1449         hdr->replen += decode_setclientid_maxsz;
1450 }
1451
1452 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs_client *client_state, struct compound_hdr *hdr)
1453 {
1454         __be32 *p;
1455
1456         RESERVE_SPACE(12 + NFS4_VERIFIER_SIZE);
1457         WRITE32(OP_SETCLIENTID_CONFIRM);
1458         WRITE64(client_state->cl_clientid);
1459         WRITEMEM(client_state->cl_confirm.data, NFS4_VERIFIER_SIZE);
1460         hdr->nops++;
1461         hdr->replen += decode_setclientid_confirm_maxsz;
1462 }
1463
1464 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1465 {
1466         __be32 *p;
1467
1468         RESERVE_SPACE(4);
1469         WRITE32(OP_WRITE);
1470
1471         encode_stateid(xdr, args->context);
1472
1473         RESERVE_SPACE(16);
1474         WRITE64(args->offset);
1475         WRITE32(args->stable);
1476         WRITE32(args->count);
1477
1478         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1479         hdr->nops++;
1480         hdr->replen += decode_write_maxsz;
1481 }
1482
1483 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1484 {
1485         __be32 *p;
1486
1487         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1488
1489         WRITE32(OP_DELEGRETURN);
1490         WRITEMEM(stateid->data, NFS4_STATEID_SIZE);
1491         hdr->nops++;
1492         hdr->replen += decode_delegreturn_maxsz;
1493 }
1494
1495 #if defined(CONFIG_NFS_V4_1)
1496 /* NFSv4.1 operations */
1497 static void encode_exchange_id(struct xdr_stream *xdr,
1498                                struct nfs41_exchange_id_args *args,
1499                                struct compound_hdr *hdr)
1500 {
1501         __be32 *p;
1502
1503         RESERVE_SPACE(4 + sizeof(args->verifier->data));
1504         WRITE32(OP_EXCHANGE_ID);
1505         WRITEMEM(args->verifier->data, sizeof(args->verifier->data));
1506
1507         encode_string(xdr, args->id_len, args->id);
1508
1509         RESERVE_SPACE(12);
1510         WRITE32(args->flags);
1511         WRITE32(0);     /* zero length state_protect4_a */
1512         WRITE32(0);     /* zero length implementation id array */
1513         hdr->nops++;
1514         hdr->replen += decode_exchange_id_maxsz;
1515 }
1516 #endif /* CONFIG_NFS_V4_1 */
1517
1518 static void encode_sequence(struct xdr_stream *xdr,
1519                             const struct nfs4_sequence_args *args,
1520                             struct compound_hdr *hdr)
1521 {
1522 #if defined(CONFIG_NFS_V4_1)
1523         struct nfs4_session *session = args->sa_session;
1524
1525         if (!session)
1526                 return;
1527
1528         /* stub */
1529         hdr->nops++;
1530         hdr->replen += decode_sequence_maxsz;
1531 #endif /* CONFIG_NFS_V4_1 */
1532 }
1533
1534 /*
1535  * END OF "GENERIC" ENCODE ROUTINES.
1536  */
1537
1538 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
1539 {
1540 #if defined(CONFIG_NFS_V4_1)
1541         if (args->sa_session)
1542                 return args->sa_session->clp->cl_minorversion;
1543 #endif /* CONFIG_NFS_V4_1 */
1544         return 0;
1545 }
1546
1547 /*
1548  * Encode an ACCESS request
1549  */
1550 static int nfs4_xdr_enc_access(struct rpc_rqst *req, __be32 *p, const struct nfs4_accessargs *args)
1551 {
1552         struct xdr_stream xdr;
1553         struct compound_hdr hdr = {
1554                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1555         };
1556
1557         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1558         encode_compound_hdr(&xdr, req, &hdr);
1559         encode_sequence(&xdr, &args->seq_args, &hdr);
1560         encode_putfh(&xdr, args->fh, &hdr);
1561         encode_access(&xdr, args->access, &hdr);
1562         encode_getfattr(&xdr, args->bitmask, &hdr);
1563         encode_nops(&hdr);
1564         return 0;
1565 }
1566
1567 /*
1568  * Encode LOOKUP request
1569  */
1570 static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_arg *args)
1571 {
1572         struct xdr_stream xdr;
1573         struct compound_hdr hdr = {
1574                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1575         };
1576
1577         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1578         encode_compound_hdr(&xdr, req, &hdr);
1579         encode_sequence(&xdr, &args->seq_args, &hdr);
1580         encode_putfh(&xdr, args->dir_fh, &hdr);
1581         encode_lookup(&xdr, args->name, &hdr);
1582         encode_getfh(&xdr, &hdr);
1583         encode_getfattr(&xdr, args->bitmask, &hdr);
1584         encode_nops(&hdr);
1585         return 0;
1586 }
1587
1588 /*
1589  * Encode LOOKUP_ROOT request
1590  */
1591 static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_root_arg *args)
1592 {
1593         struct xdr_stream xdr;
1594         struct compound_hdr hdr = {
1595                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1596         };
1597
1598         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1599         encode_compound_hdr(&xdr, req, &hdr);
1600         encode_sequence(&xdr, &args->seq_args, &hdr);
1601         encode_putrootfh(&xdr, &hdr);
1602         encode_getfh(&xdr, &hdr);
1603         encode_getfattr(&xdr, args->bitmask, &hdr);
1604         encode_nops(&hdr);
1605         return 0;
1606 }
1607
1608 /*
1609  * Encode REMOVE request
1610  */
1611 static int nfs4_xdr_enc_remove(struct rpc_rqst *req, __be32 *p, const struct nfs_removeargs *args)
1612 {
1613         struct xdr_stream xdr;
1614         struct compound_hdr hdr = {
1615                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1616         };
1617
1618         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1619         encode_compound_hdr(&xdr, req, &hdr);
1620         encode_sequence(&xdr, &args->seq_args, &hdr);
1621         encode_putfh(&xdr, args->fh, &hdr);
1622         encode_remove(&xdr, &args->name, &hdr);
1623         encode_getfattr(&xdr, args->bitmask, &hdr);
1624         encode_nops(&hdr);
1625         return 0;
1626 }
1627
1628 /*
1629  * Encode RENAME request
1630  */
1631 static int nfs4_xdr_enc_rename(struct rpc_rqst *req, __be32 *p, const struct nfs4_rename_arg *args)
1632 {
1633         struct xdr_stream xdr;
1634         struct compound_hdr hdr = {
1635                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1636         };
1637
1638         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1639         encode_compound_hdr(&xdr, req, &hdr);
1640         encode_sequence(&xdr, &args->seq_args, &hdr);
1641         encode_putfh(&xdr, args->old_dir, &hdr);
1642         encode_savefh(&xdr, &hdr);
1643         encode_putfh(&xdr, args->new_dir, &hdr);
1644         encode_rename(&xdr, args->old_name, args->new_name, &hdr);
1645         encode_getfattr(&xdr, args->bitmask, &hdr);
1646         encode_restorefh(&xdr, &hdr);
1647         encode_getfattr(&xdr, args->bitmask, &hdr);
1648         encode_nops(&hdr);
1649         return 0;
1650 }
1651
1652 /*
1653  * Encode LINK request
1654  */
1655 static int nfs4_xdr_enc_link(struct rpc_rqst *req, __be32 *p, const struct nfs4_link_arg *args)
1656 {
1657         struct xdr_stream xdr;
1658         struct compound_hdr hdr = {
1659                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1660         };
1661
1662         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1663         encode_compound_hdr(&xdr, req, &hdr);
1664         encode_sequence(&xdr, &args->seq_args, &hdr);
1665         encode_putfh(&xdr, args->fh, &hdr);
1666         encode_savefh(&xdr, &hdr);
1667         encode_putfh(&xdr, args->dir_fh, &hdr);
1668         encode_link(&xdr, args->name, &hdr);
1669         encode_getfattr(&xdr, args->bitmask, &hdr);
1670         encode_restorefh(&xdr, &hdr);
1671         encode_getfattr(&xdr, args->bitmask, &hdr);
1672         encode_nops(&hdr);
1673         return 0;
1674 }
1675
1676 /*
1677  * Encode CREATE request
1678  */
1679 static int nfs4_xdr_enc_create(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1680 {
1681         struct xdr_stream xdr;
1682         struct compound_hdr hdr = {
1683                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1684         };
1685
1686         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1687         encode_compound_hdr(&xdr, req, &hdr);
1688         encode_sequence(&xdr, &args->seq_args, &hdr);
1689         encode_putfh(&xdr, args->dir_fh, &hdr);
1690         encode_savefh(&xdr, &hdr);
1691         encode_create(&xdr, args, &hdr);
1692         encode_getfh(&xdr, &hdr);
1693         encode_getfattr(&xdr, args->bitmask, &hdr);
1694         encode_restorefh(&xdr, &hdr);
1695         encode_getfattr(&xdr, args->bitmask, &hdr);
1696         encode_nops(&hdr);
1697         return 0;
1698 }
1699
1700 /*
1701  * Encode SYMLINK request
1702  */
1703 static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1704 {
1705         return nfs4_xdr_enc_create(req, p, args);
1706 }
1707
1708 /*
1709  * Encode GETATTR request
1710  */
1711 static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, __be32 *p, const struct nfs4_getattr_arg *args)
1712 {
1713         struct xdr_stream xdr;
1714         struct compound_hdr hdr = {
1715                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1716         };
1717
1718         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1719         encode_compound_hdr(&xdr, req, &hdr);
1720         encode_sequence(&xdr, &args->seq_args, &hdr);
1721         encode_putfh(&xdr, args->fh, &hdr);
1722         encode_getfattr(&xdr, args->bitmask, &hdr);
1723         encode_nops(&hdr);
1724         return 0;
1725 }
1726
1727 /*
1728  * Encode a CLOSE request
1729  */
1730 static int nfs4_xdr_enc_close(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1731 {
1732         struct xdr_stream xdr;
1733         struct compound_hdr hdr = {
1734                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1735         };
1736
1737         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1738         encode_compound_hdr(&xdr, req, &hdr);
1739         encode_sequence(&xdr, &args->seq_args, &hdr);
1740         encode_putfh(&xdr, args->fh, &hdr);
1741         encode_close(&xdr, args, &hdr);
1742         encode_getfattr(&xdr, args->bitmask, &hdr);
1743         encode_nops(&hdr);
1744         return 0;
1745 }
1746
1747 /*
1748  * Encode an OPEN request
1749  */
1750 static int nfs4_xdr_enc_open(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1751 {
1752         struct xdr_stream xdr;
1753         struct compound_hdr hdr = {
1754                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1755         };
1756
1757         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1758         encode_compound_hdr(&xdr, req, &hdr);
1759         encode_sequence(&xdr, &args->seq_args, &hdr);
1760         encode_putfh(&xdr, args->fh, &hdr);
1761         encode_savefh(&xdr, &hdr);
1762         encode_open(&xdr, args, &hdr);
1763         encode_getfh(&xdr, &hdr);
1764         encode_getfattr(&xdr, args->bitmask, &hdr);
1765         encode_restorefh(&xdr, &hdr);
1766         encode_getfattr(&xdr, args->bitmask, &hdr);
1767         encode_nops(&hdr);
1768         return 0;
1769 }
1770
1771 /*
1772  * Encode an OPEN_CONFIRM request
1773  */
1774 static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_open_confirmargs *args)
1775 {
1776         struct xdr_stream xdr;
1777         struct compound_hdr hdr = {
1778                 .nops   = 0,
1779         };
1780
1781         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1782         encode_compound_hdr(&xdr, req, &hdr);
1783         encode_putfh(&xdr, args->fh, &hdr);
1784         encode_open_confirm(&xdr, args, &hdr);
1785         encode_nops(&hdr);
1786         return 0;
1787 }
1788
1789 /*
1790  * Encode an OPEN request with no attributes.
1791  */
1792 static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1793 {
1794         struct xdr_stream xdr;
1795         struct compound_hdr hdr = {
1796                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1797         };
1798
1799         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1800         encode_compound_hdr(&xdr, req, &hdr);
1801         encode_sequence(&xdr, &args->seq_args, &hdr);
1802         encode_putfh(&xdr, args->fh, &hdr);
1803         encode_open(&xdr, args, &hdr);
1804         encode_getfattr(&xdr, args->bitmask, &hdr);
1805         encode_nops(&hdr);
1806         return 0;
1807 }
1808
1809 /*
1810  * Encode an OPEN_DOWNGRADE request
1811  */
1812 static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1813 {
1814         struct xdr_stream xdr;
1815         struct compound_hdr hdr = {
1816                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1817         };
1818
1819         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1820         encode_compound_hdr(&xdr, req, &hdr);
1821         encode_sequence(&xdr, &args->seq_args, &hdr);
1822         encode_putfh(&xdr, args->fh, &hdr);
1823         encode_open_downgrade(&xdr, args, &hdr);
1824         encode_getfattr(&xdr, args->bitmask, &hdr);
1825         encode_nops(&hdr);
1826         return 0;
1827 }
1828
1829 /*
1830  * Encode a LOCK request
1831  */
1832 static int nfs4_xdr_enc_lock(struct rpc_rqst *req, __be32 *p, struct nfs_lock_args *args)
1833 {
1834         struct xdr_stream xdr;
1835         struct compound_hdr hdr = {
1836                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1837         };
1838
1839         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1840         encode_compound_hdr(&xdr, req, &hdr);
1841         encode_sequence(&xdr, &args->seq_args, &hdr);
1842         encode_putfh(&xdr, args->fh, &hdr);
1843         encode_lock(&xdr, args, &hdr);
1844         encode_nops(&hdr);
1845         return 0;
1846 }
1847
1848 /*
1849  * Encode a LOCKT request
1850  */
1851 static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, __be32 *p, struct nfs_lockt_args *args)
1852 {
1853         struct xdr_stream xdr;
1854         struct compound_hdr hdr = {
1855                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1856         };
1857
1858         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1859         encode_compound_hdr(&xdr, req, &hdr);
1860         encode_sequence(&xdr, &args->seq_args, &hdr);
1861         encode_putfh(&xdr, args->fh, &hdr);
1862         encode_lockt(&xdr, args, &hdr);
1863         encode_nops(&hdr);
1864         return 0;
1865 }
1866
1867 /*
1868  * Encode a LOCKU request
1869  */
1870 static int nfs4_xdr_enc_locku(struct rpc_rqst *req, __be32 *p, struct nfs_locku_args *args)
1871 {
1872         struct xdr_stream xdr;
1873         struct compound_hdr hdr = {
1874                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1875         };
1876
1877         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1878         encode_compound_hdr(&xdr, req, &hdr);
1879         encode_sequence(&xdr, &args->seq_args, &hdr);
1880         encode_putfh(&xdr, args->fh, &hdr);
1881         encode_locku(&xdr, args, &hdr);
1882         encode_nops(&hdr);
1883         return 0;
1884 }
1885
1886 /*
1887  * Encode a READLINK request
1888  */
1889 static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_readlink *args)
1890 {
1891         struct xdr_stream xdr;
1892         struct compound_hdr hdr = {
1893                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1894         };
1895
1896         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1897         encode_compound_hdr(&xdr, req, &hdr);
1898         encode_sequence(&xdr, &args->seq_args, &hdr);
1899         encode_putfh(&xdr, args->fh, &hdr);
1900         encode_readlink(&xdr, args, req, &hdr);
1901
1902         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
1903                         args->pgbase, args->pglen);
1904         encode_nops(&hdr);
1905         return 0;
1906 }
1907
1908 /*
1909  * Encode a READDIR request
1910  */
1911 static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, __be32 *p, const struct nfs4_readdir_arg *args)
1912 {
1913         struct xdr_stream xdr;
1914         struct compound_hdr hdr = {
1915                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1916         };
1917
1918         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1919         encode_compound_hdr(&xdr, req, &hdr);
1920         encode_sequence(&xdr, &args->seq_args, &hdr);
1921         encode_putfh(&xdr, args->fh, &hdr);
1922         encode_readdir(&xdr, args, req, &hdr);
1923
1924         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
1925                          args->pgbase, args->count);
1926         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
1927                         __func__, hdr.replen << 2, args->pages,
1928                         args->pgbase, args->count);
1929         encode_nops(&hdr);
1930         return 0;
1931 }
1932
1933 /*
1934  * Encode a READ request
1935  */
1936 static int nfs4_xdr_enc_read(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
1937 {
1938         struct xdr_stream xdr;
1939         struct compound_hdr hdr = {
1940                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1941         };
1942
1943         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1944         encode_compound_hdr(&xdr, req, &hdr);
1945         encode_sequence(&xdr, &args->seq_args, &hdr);
1946         encode_putfh(&xdr, args->fh, &hdr);
1947         encode_read(&xdr, args, &hdr);
1948
1949         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
1950                          args->pages, args->pgbase, args->count);
1951         req->rq_rcv_buf.flags |= XDRBUF_READ;
1952         encode_nops(&hdr);
1953         return 0;
1954 }
1955
1956 /*
1957  * Encode an SETATTR request
1958  */
1959 static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, __be32 *p, struct nfs_setattrargs *args)
1960 {
1961         struct xdr_stream xdr;
1962         struct compound_hdr hdr = {
1963                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1964         };
1965
1966         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1967         encode_compound_hdr(&xdr, req, &hdr);
1968         encode_sequence(&xdr, &args->seq_args, &hdr);
1969         encode_putfh(&xdr, args->fh, &hdr);
1970         encode_setattr(&xdr, args, args->server, &hdr);
1971         encode_getfattr(&xdr, args->bitmask, &hdr);
1972         encode_nops(&hdr);
1973         return 0;
1974 }
1975
1976 /*
1977  * Encode a GETACL request
1978  */
1979 static int
1980 nfs4_xdr_enc_getacl(struct rpc_rqst *req, __be32 *p,
1981                 struct nfs_getaclargs *args)
1982 {
1983         struct xdr_stream xdr;
1984         struct compound_hdr hdr = {
1985                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1986         };
1987         uint32_t replen;
1988
1989         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1990         encode_compound_hdr(&xdr, req, &hdr);
1991         encode_sequence(&xdr, &args->seq_args, &hdr);
1992         encode_putfh(&xdr, args->fh, &hdr);
1993         replen = hdr.replen + nfs4_fattr_bitmap_maxsz + 1;
1994         encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0, &hdr);
1995
1996         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
1997                 args->acl_pages, args->acl_pgbase, args->acl_len);
1998         encode_nops(&hdr);
1999         return 0;
2000 }
2001
2002 /*
2003  * Encode a WRITE request
2004  */
2005 static int nfs4_xdr_enc_write(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
2006 {
2007         struct xdr_stream xdr;
2008         struct compound_hdr hdr = {
2009                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2010         };
2011
2012         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2013         encode_compound_hdr(&xdr, req, &hdr);
2014         encode_sequence(&xdr, &args->seq_args, &hdr);
2015         encode_putfh(&xdr, args->fh, &hdr);
2016         encode_write(&xdr, args, &hdr);
2017         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2018         encode_getfattr(&xdr, args->bitmask, &hdr);
2019         encode_nops(&hdr);
2020         return 0;
2021 }
2022
2023 /*
2024  *  a COMMIT request
2025  */
2026 static int nfs4_xdr_enc_commit(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
2027 {
2028         struct xdr_stream xdr;
2029         struct compound_hdr hdr = {
2030                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2031         };
2032
2033         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2034         encode_compound_hdr(&xdr, req, &hdr);
2035         encode_sequence(&xdr, &args->seq_args, &hdr);
2036         encode_putfh(&xdr, args->fh, &hdr);
2037         encode_commit(&xdr, args, &hdr);
2038         encode_getfattr(&xdr, args->bitmask, &hdr);
2039         encode_nops(&hdr);
2040         return 0;
2041 }
2042
2043 /*
2044  * FSINFO request
2045  */
2046 static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs4_fsinfo_arg *args)
2047 {
2048         struct xdr_stream xdr;
2049         struct compound_hdr hdr = {
2050                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2051         };
2052
2053         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2054         encode_compound_hdr(&xdr, req, &hdr);
2055         encode_sequence(&xdr, &args->seq_args, &hdr);
2056         encode_putfh(&xdr, args->fh, &hdr);
2057         encode_fsinfo(&xdr, args->bitmask, &hdr);
2058         encode_nops(&hdr);
2059         return 0;
2060 }
2061
2062 /*
2063  * a PATHCONF request
2064  */
2065 static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, __be32 *p, const struct nfs4_pathconf_arg *args)
2066 {
2067         struct xdr_stream xdr;
2068         struct compound_hdr hdr = {
2069                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2070         };
2071
2072         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2073         encode_compound_hdr(&xdr, req, &hdr);
2074         encode_sequence(&xdr, &args->seq_args, &hdr);
2075         encode_putfh(&xdr, args->fh, &hdr);
2076         encode_getattr_one(&xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2077                            &hdr);
2078         encode_nops(&hdr);
2079         return 0;
2080 }
2081
2082 /*
2083  * a STATFS request
2084  */
2085 static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, __be32 *p, const struct nfs4_statfs_arg *args)
2086 {
2087         struct xdr_stream xdr;
2088         struct compound_hdr hdr = {
2089                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2090         };
2091
2092         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2093         encode_compound_hdr(&xdr, req, &hdr);
2094         encode_sequence(&xdr, &args->seq_args, &hdr);
2095         encode_putfh(&xdr, args->fh, &hdr);
2096         encode_getattr_two(&xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2097                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2098         encode_nops(&hdr);
2099         return 0;
2100 }
2101
2102 /*
2103  * GETATTR_BITMAP request
2104  */
2105 static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, __be32 *p,
2106                                     struct nfs4_server_caps_arg *args)
2107 {
2108         struct xdr_stream xdr;
2109         struct compound_hdr hdr = {
2110                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2111         };
2112
2113         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2114         encode_compound_hdr(&xdr, req, &hdr);
2115         encode_sequence(&xdr, &args->seq_args, &hdr);
2116         encode_putfh(&xdr, args->fhandle, &hdr);
2117         encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2118                            FATTR4_WORD0_LINK_SUPPORT|
2119                            FATTR4_WORD0_SYMLINK_SUPPORT|
2120                            FATTR4_WORD0_ACLSUPPORT, &hdr);
2121         encode_nops(&hdr);
2122         return 0;
2123 }
2124
2125 /*
2126  * a RENEW request
2127  */
2128 static int nfs4_xdr_enc_renew(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2129 {
2130         struct xdr_stream xdr;
2131         struct compound_hdr hdr = {
2132                 .nops   = 0,
2133         };
2134
2135         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2136         encode_compound_hdr(&xdr, req, &hdr);
2137         encode_renew(&xdr, clp, &hdr);
2138         encode_nops(&hdr);
2139         return 0;
2140 }
2141
2142 /*
2143  * a SETCLIENTID request
2144  */
2145 static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid *sc)
2146 {
2147         struct xdr_stream xdr;
2148         struct compound_hdr hdr = {
2149                 .nops   = 0,
2150         };
2151
2152         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2153         encode_compound_hdr(&xdr, req, &hdr);
2154         encode_setclientid(&xdr, sc, &hdr);
2155         encode_nops(&hdr);
2156         return 0;
2157 }
2158
2159 /*
2160  * a SETCLIENTID_CONFIRM request
2161  */
2162 static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2163 {
2164         struct xdr_stream xdr;
2165         struct compound_hdr hdr = {
2166                 .nops   = 0,
2167         };
2168         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2169
2170         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2171         encode_compound_hdr(&xdr, req, &hdr);
2172         encode_setclientid_confirm(&xdr, clp, &hdr);
2173         encode_putrootfh(&xdr, &hdr);
2174         encode_fsinfo(&xdr, lease_bitmap, &hdr);
2175         encode_nops(&hdr);
2176         return 0;
2177 }
2178
2179 /*
2180  * DELEGRETURN request
2181  */
2182 static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, __be32 *p, const struct nfs4_delegreturnargs *args)
2183 {
2184         struct xdr_stream xdr;
2185         struct compound_hdr hdr = {
2186                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2187         };
2188
2189         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2190         encode_compound_hdr(&xdr, req, &hdr);
2191         encode_sequence(&xdr, &args->seq_args, &hdr);
2192         encode_putfh(&xdr, args->fhandle, &hdr);
2193         encode_delegreturn(&xdr, args->stateid, &hdr);
2194         encode_getfattr(&xdr, args->bitmask, &hdr);
2195         encode_nops(&hdr);
2196         return 0;
2197 }
2198
2199 /*
2200  * Encode FS_LOCATIONS request
2201  */
2202 static int nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations_arg *args)
2203 {
2204         struct xdr_stream xdr;
2205         struct compound_hdr hdr = {
2206                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2207         };
2208         uint32_t replen;
2209
2210         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2211         encode_compound_hdr(&xdr, req, &hdr);
2212         encode_sequence(&xdr, &args->seq_args, &hdr);
2213         encode_putfh(&xdr, args->dir_fh, &hdr);
2214         encode_lookup(&xdr, args->name, &hdr);
2215         replen = hdr.replen;    /* get the attribute into args->page */
2216         encode_fs_locations(&xdr, args->bitmask, &hdr);
2217
2218         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2219                         0, PAGE_SIZE);
2220         encode_nops(&hdr);
2221         return 0;
2222 }
2223
2224 #if defined(CONFIG_NFS_V4_1)
2225 /*
2226  * EXCHANGE_ID request
2227  */
2228 static int nfs4_xdr_enc_exchange_id(struct rpc_rqst *req, uint32_t *p,
2229                                     struct nfs41_exchange_id_args *args)
2230 {
2231         struct xdr_stream xdr;
2232         struct compound_hdr hdr = {
2233                 .minorversion = args->client->cl_minorversion,
2234         };
2235
2236         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2237         encode_compound_hdr(&xdr, req, &hdr);
2238         encode_exchange_id(&xdr, args, &hdr);
2239         encode_nops(&hdr);
2240         return 0;
2241 }
2242
2243 /*
2244  * a GET_LEASE_TIME request
2245  */
2246 static int nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req, uint32_t *p,
2247                                        struct nfs4_get_lease_time_args *args)
2248 {
2249         struct xdr_stream xdr;
2250         struct compound_hdr hdr = {
2251                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2252         };
2253         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2254
2255         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2256         encode_compound_hdr(&xdr, req, &hdr);
2257         encode_sequence(&xdr, &args->la_seq_args, &hdr);
2258         encode_putrootfh(&xdr, &hdr);
2259         encode_fsinfo(&xdr, lease_bitmap, &hdr);
2260         encode_nops(&hdr);
2261         return 0;
2262 }
2263 #endif /* CONFIG_NFS_V4_1 */
2264
2265 /*
2266  * START OF "GENERIC" DECODE ROUTINES.
2267  *   These may look a little ugly since they are imported from a "generic"
2268  * set of XDR encode/decode routines which are intended to be shared by
2269  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
2270  *
2271  * If the pain of reading these is too great, it should be a straightforward
2272  * task to translate them into Linux-specific versions which are more
2273  * consistent with the style used in NFSv2/v3...
2274  */
2275 #define READ32(x)         (x) = ntohl(*p++)
2276 #define READ64(x)         do {                  \
2277         (x) = (u64)ntohl(*p++) << 32;           \
2278         (x) |= ntohl(*p++);                     \
2279 } while (0)
2280 #define READTIME(x)       do {                  \
2281         p++;                                    \
2282         (x.tv_sec) = ntohl(*p++);               \
2283         (x.tv_nsec) = ntohl(*p++);              \
2284 } while (0)
2285 #define COPYMEM(x,nbytes) do {                  \
2286         memcpy((x), p, nbytes);                 \
2287         p += XDR_QUADLEN(nbytes);               \
2288 } while (0)
2289
2290 #define READ_BUF(nbytes)  do { \
2291         p = xdr_inline_decode(xdr, nbytes); \
2292         if (unlikely(!p)) { \
2293                 dprintk("nfs: %s: prematurely hit end of receive" \
2294                                 " buffer\n", __func__); \
2295                 dprintk("nfs: %s: xdr->p=%p, bytes=%u, xdr->end=%p\n", \
2296                                 __func__, xdr->p, nbytes, xdr->end); \
2297                 return -EIO; \
2298         } \
2299 } while (0)
2300
2301 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2302 {
2303         __be32 *p;
2304
2305         READ_BUF(4);
2306         READ32(*len);
2307         READ_BUF(*len);
2308         *string = (char *)p;
2309         return 0;
2310 }
2311
2312 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2313 {
2314         __be32 *p;
2315
2316         READ_BUF(8);
2317         READ32(hdr->status);
2318         READ32(hdr->taglen);
2319
2320         READ_BUF(hdr->taglen + 4);
2321         hdr->tag = (char *)p;
2322         p += XDR_QUADLEN(hdr->taglen);
2323         READ32(hdr->nops);
2324         if (unlikely(hdr->nops < 1))
2325                 return nfs4_stat_to_errno(hdr->status);
2326         return 0;
2327 }
2328
2329 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2330 {
2331         __be32 *p;
2332         uint32_t opnum;
2333         int32_t nfserr;
2334
2335         READ_BUF(8);
2336         READ32(opnum);
2337         if (opnum != expected) {
2338                 dprintk("nfs: Server returned operation"
2339                         " %d but we issued a request for %d\n",
2340                                 opnum, expected);
2341                 return -EIO;
2342         }
2343         READ32(nfserr);
2344         if (nfserr != NFS_OK)
2345                 return nfs4_stat_to_errno(nfserr);
2346         return 0;
2347 }
2348
2349 /* Dummy routine */
2350 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2351 {
2352         __be32 *p;
2353         unsigned int strlen;
2354         char *str;
2355
2356         READ_BUF(12);
2357         return decode_opaque_inline(xdr, &strlen, &str);
2358 }
2359
2360 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2361 {
2362         uint32_t bmlen;
2363         __be32 *p;
2364
2365         READ_BUF(4);
2366         READ32(bmlen);
2367
2368         bitmap[0] = bitmap[1] = 0;
2369         READ_BUF((bmlen << 2));
2370         if (bmlen > 0) {
2371                 READ32(bitmap[0]);
2372                 if (bmlen > 1)
2373                         READ32(bitmap[1]);
2374         }
2375         return 0;
2376 }
2377
2378 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
2379 {
2380         __be32 *p;
2381
2382         READ_BUF(4);
2383         READ32(*attrlen);
2384         *savep = xdr->p;
2385         return 0;
2386 }
2387
2388 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2389 {
2390         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2391                 decode_attr_bitmap(xdr, bitmask);
2392                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2393         } else
2394                 bitmask[0] = bitmask[1] = 0;
2395         dprintk("%s: bitmask=%08x:%08x\n", __func__, bitmask[0], bitmask[1]);
2396         return 0;
2397 }
2398
2399 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2400 {
2401         __be32 *p;
2402         int ret = 0;
2403
2404         *type = 0;
2405         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2406                 return -EIO;
2407         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2408                 READ_BUF(4);
2409                 READ32(*type);
2410                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2411                         dprintk("%s: bad type %d\n", __func__, *type);
2412                         return -EIO;
2413                 }
2414                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2415                 ret = NFS_ATTR_FATTR_TYPE;
2416         }
2417         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
2418         return ret;
2419 }
2420
2421 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2422 {
2423         __be32 *p;
2424         int ret = 0;
2425
2426         *change = 0;
2427         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2428                 return -EIO;
2429         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2430                 READ_BUF(8);
2431                 READ64(*change);
2432                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2433                 ret = NFS_ATTR_FATTR_CHANGE;
2434         }
2435         dprintk("%s: change attribute=%Lu\n", __func__,
2436                         (unsigned long long)*change);
2437         return ret;
2438 }
2439
2440 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2441 {
2442         __be32 *p;
2443         int ret = 0;
2444
2445         *size = 0;
2446         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2447                 return -EIO;
2448         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2449                 READ_BUF(8);
2450                 READ64(*size);
2451                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2452                 ret = NFS_ATTR_FATTR_SIZE;
2453         }
2454         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
2455         return ret;
2456 }
2457
2458 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2459 {
2460         __be32 *p;
2461
2462         *res = 0;
2463         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2464                 return -EIO;
2465         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2466                 READ_BUF(4);
2467                 READ32(*res);
2468                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2469         }
2470         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
2471         return 0;
2472 }
2473
2474 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2475 {
2476         __be32 *p;
2477
2478         *res = 0;
2479         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2480                 return -EIO;
2481         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2482                 READ_BUF(4);
2483                 READ32(*res);
2484                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2485         }
2486         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
2487         return 0;
2488 }
2489
2490 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
2491 {
2492         __be32 *p;
2493         int ret = 0;
2494
2495         fsid->major = 0;
2496         fsid->minor = 0;
2497         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2498                 return -EIO;
2499         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2500                 READ_BUF(16);
2501                 READ64(fsid->major);
2502                 READ64(fsid->minor);
2503                 bitmap[0] &= ~FATTR4_WORD0_FSID;
2504                 ret = NFS_ATTR_FATTR_FSID;
2505         }
2506         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
2507                         (unsigned long long)fsid->major,
2508                         (unsigned long long)fsid->minor);
2509         return ret;
2510 }
2511
2512 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2513 {
2514         __be32 *p;
2515
2516         *res = 60;
2517         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2518                 return -EIO;
2519         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2520                 READ_BUF(4);
2521                 READ32(*res);
2522                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2523         }
2524         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
2525         return 0;
2526 }
2527
2528 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2529 {
2530         __be32 *p;
2531
2532         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2533         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2534                 return -EIO;
2535         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2536                 READ_BUF(4);
2537                 READ32(*res);
2538                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2539         }
2540         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
2541         return 0;
2542 }
2543
2544 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2545 {
2546         __be32 *p;
2547         int ret = 0;
2548
2549         *fileid = 0;
2550         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2551                 return -EIO;
2552         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2553                 READ_BUF(8);
2554                 READ64(*fileid);
2555                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2556                 ret = NFS_ATTR_FATTR_FILEID;
2557         }
2558         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2559         return ret;
2560 }
2561
2562 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2563 {
2564         __be32 *p;
2565         int ret = 0;
2566
2567         *fileid = 0;
2568         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
2569                 return -EIO;
2570         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
2571                 READ_BUF(8);
2572                 READ64(*fileid);
2573                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
2574                 ret = NFS_ATTR_FATTR_FILEID;
2575         }
2576         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2577         return ret;
2578 }
2579
2580 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2581 {
2582         __be32 *p;
2583         int status = 0;
2584
2585         *res = 0;
2586         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
2587                 return -EIO;
2588         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
2589                 READ_BUF(8);
2590                 READ64(*res);
2591                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
2592         }
2593         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
2594         return status;
2595 }
2596
2597 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2598 {
2599         __be32 *p;
2600         int status = 0;
2601
2602         *res = 0;
2603         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
2604                 return -EIO;
2605         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
2606                 READ_BUF(8);
2607                 READ64(*res);
2608                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
2609         }
2610         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
2611         return status;
2612 }
2613
2614 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2615 {
2616         __be32 *p;
2617         int status = 0;
2618
2619         *res = 0;
2620         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
2621                 return -EIO;
2622         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
2623                 READ_BUF(8);
2624                 READ64(*res);
2625                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
2626         }
2627         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
2628         return status;
2629 }
2630
2631 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
2632 {
2633         u32 n;
2634         __be32 *p;
2635         int status = 0;
2636
2637         READ_BUF(4);
2638         READ32(n);
2639         if (n == 0)
2640                 goto root_path;
2641         dprintk("path ");
2642         path->ncomponents = 0;
2643         while (path->ncomponents < n) {
2644                 struct nfs4_string *component = &path->components[path->ncomponents];
2645                 status = decode_opaque_inline(xdr, &component->len, &component->data);
2646                 if (unlikely(status != 0))
2647                         goto out_eio;
2648                 if (path->ncomponents != n)
2649                         dprintk("/");
2650                 dprintk("%s", component->data);
2651                 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
2652                         path->ncomponents++;
2653                 else {
2654                         dprintk("cannot parse %d components in path\n", n);
2655                         goto out_eio;
2656                 }
2657         }
2658 out:
2659         dprintk("\n");
2660         return status;
2661 root_path:
2662 /* a root pathname is sent as a zero component4 */
2663         path->ncomponents = 1;
2664         path->components[0].len=0;
2665         path->components[0].data=NULL;
2666         dprintk("path /\n");
2667         goto out;
2668 out_eio:
2669         dprintk(" status %d", status);
2670         status = -EIO;
2671         goto out;
2672 }
2673
2674 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
2675 {
2676         int n;
2677         __be32 *p;
2678         int status = -EIO;
2679
2680         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
2681                 goto out;
2682         status = 0;
2683         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
2684                 goto out;
2685         dprintk("%s: fsroot ", __func__);
2686         status = decode_pathname(xdr, &res->fs_path);
2687         if (unlikely(status != 0))
2688                 goto out;
2689         READ_BUF(4);
2690         READ32(n);
2691         if (n <= 0)
2692                 goto out_eio;
2693         res->nlocations = 0;
2694         while (res->nlocations < n) {
2695                 u32 m;
2696                 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
2697
2698                 READ_BUF(4);
2699                 READ32(m);
2700
2701                 loc->nservers = 0;
2702                 dprintk("%s: servers ", __func__);
2703                 while (loc->nservers < m) {
2704                         struct nfs4_string *server = &loc->servers[loc->nservers];
2705                         status = decode_opaque_inline(xdr, &server->len, &server->data);
2706                         if (unlikely(status != 0))
2707                                 goto out_eio;
2708                         dprintk("%s ", server->data);
2709                         if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
2710                                 loc->nservers++;
2711                         else {
2712                                 unsigned int i;
2713                                 dprintk("%s: using first %u of %u servers "
2714                                         "returned for location %u\n",
2715                                                 __func__,
2716                                                 NFS4_FS_LOCATION_MAXSERVERS,
2717                                                 m, res->nlocations);
2718                                 for (i = loc->nservers; i < m; i++) {
2719                                         unsigned int len;
2720                                         char *data;
2721                                         status = decode_opaque_inline(xdr, &len, &data);
2722                                         if (unlikely(status != 0))
2723                                                 goto out_eio;
2724                                 }
2725                         }
2726                 }
2727                 status = decode_pathname(xdr, &loc->rootpath);
2728                 if (unlikely(status != 0))
2729                         goto out_eio;
2730                 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
2731                         res->nlocations++;
2732         }
2733         if (res->nlocations != 0)
2734                 status = NFS_ATTR_FATTR_V4_REFERRAL;
2735 out:
2736         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
2737         return status;
2738 out_eio:
2739         status = -EIO;
2740         goto out;
2741 }
2742
2743 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2744 {
2745         __be32 *p;
2746         int status = 0;
2747
2748         *res = 0;
2749         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
2750                 return -EIO;
2751         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
2752                 READ_BUF(8);
2753                 READ64(*res);
2754                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
2755         }
2756         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
2757         return status;
2758 }
2759
2760 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
2761 {
2762         __be32 *p;
2763         int status = 0;
2764
2765         *maxlink = 1;
2766         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
2767                 return -EIO;
2768         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
2769                 READ_BUF(4);
2770                 READ32(*maxlink);
2771                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
2772         }
2773         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
2774         return status;
2775 }
2776
2777 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
2778 {
2779         __be32 *p;
2780         int status = 0;
2781
2782         *maxname = 1024;
2783         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
2784                 return -EIO;
2785         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
2786                 READ_BUF(4);
2787                 READ32(*maxname);
2788                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
2789         }
2790         dprintk("%s: maxname=%u\n", __func__, *maxname);
2791         return status;
2792 }
2793
2794 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2795 {
2796         __be32 *p;
2797         int status = 0;
2798
2799         *res = 1024;
2800         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
2801                 return -EIO;
2802         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
2803                 uint64_t maxread;
2804                 READ_BUF(8);
2805                 READ64(maxread);
2806                 if (maxread > 0x7FFFFFFF)
2807                         maxread = 0x7FFFFFFF;
2808                 *res = (uint32_t)maxread;
2809                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
2810         }
2811         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
2812         return status;
2813 }
2814
2815 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2816 {
2817         __be32 *p;
2818         int status = 0;
2819
2820         *res = 1024;
2821         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
2822                 return -EIO;
2823         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
2824                 uint64_t maxwrite;
2825                 READ_BUF(8);
2826                 READ64(maxwrite);
2827                 if (maxwrite > 0x7FFFFFFF)
2828                         maxwrite = 0x7FFFFFFF;
2829                 *res = (uint32_t)maxwrite;
2830                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
2831         }
2832         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
2833         return status;
2834 }
2835
2836 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
2837 {
2838         uint32_t tmp;
2839         __be32 *p;
2840         int ret = 0;
2841
2842         *mode = 0;
2843         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
2844                 return -EIO;
2845         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
2846                 READ_BUF(4);
2847                 READ32(tmp);
2848                 *mode = tmp & ~S_IFMT;
2849                 bitmap[1] &= ~FATTR4_WORD1_MODE;
2850                 ret = NFS_ATTR_FATTR_MODE;
2851         }
2852         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
2853         return ret;
2854 }
2855
2856 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
2857 {
2858         __be32 *p;
2859         int ret = 0;
2860
2861         *nlink = 1;
2862         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
2863                 return -EIO;
2864         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
2865                 READ_BUF(4);
2866                 READ32(*nlink);
2867                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
2868                 ret = NFS_ATTR_FATTR_NLINK;
2869         }
2870         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
2871         return ret;
2872 }
2873
2874 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *uid)
2875 {
2876         uint32_t len;
2877         __be32 *p;
2878         int ret = 0;
2879
2880         *uid = -2;
2881         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
2882                 return -EIO;
2883         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
2884                 READ_BUF(4);
2885                 READ32(len);
2886                 READ_BUF(len);
2887                 if (len < XDR_MAX_NETOBJ) {
2888                         if (nfs_map_name_to_uid(clp, (char *)p, len, uid) == 0)
2889                                 ret = NFS_ATTR_FATTR_OWNER;
2890                         else
2891                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
2892                                                 __func__);
2893                 } else
2894                         dprintk("%s: name too long (%u)!\n",
2895                                         __func__, len);
2896                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
2897         }
2898         dprintk("%s: uid=%d\n", __func__, (int)*uid);
2899         return ret;
2900 }
2901
2902 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *gid)
2903 {
2904         uint32_t len;
2905         __be32 *p;
2906         int ret = 0;
2907
2908         *gid = -2;
2909         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
2910                 return -EIO;
2911         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
2912                 READ_BUF(4);
2913                 READ32(len);
2914                 READ_BUF(len);
2915                 if (len < XDR_MAX_NETOBJ) {
2916                         if (nfs_map_group_to_gid(clp, (char *)p, len, gid) == 0)
2917                                 ret = NFS_ATTR_FATTR_GROUP;
2918                         else
2919                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
2920                                                 __func__);
2921                 } else
2922                         dprintk("%s: name too long (%u)!\n",
2923                                         __func__, len);
2924                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
2925         }
2926         dprintk("%s: gid=%d\n", __func__, (int)*gid);
2927         return ret;
2928 }
2929
2930 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
2931 {
2932         uint32_t major = 0, minor = 0;
2933         __be32 *p;
2934         int ret = 0;
2935
2936         *rdev = MKDEV(0,0);
2937         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
2938                 return -EIO;
2939         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
2940                 dev_t tmp;
2941
2942                 READ_BUF(8);
2943                 READ32(major);
2944                 READ32(minor);
2945                 tmp = MKDEV(major, minor);
2946                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
2947                         *rdev = tmp;
2948                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
2949                 ret = NFS_ATTR_FATTR_RDEV;
2950         }
2951         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
2952         return ret;
2953 }
2954
2955 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2956 {
2957         __be32 *p;
2958         int status = 0;
2959
2960         *res = 0;
2961         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
2962                 return -EIO;
2963         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
2964                 READ_BUF(8);
2965                 READ64(*res);
2966                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
2967         }
2968         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
2969         return status;
2970 }
2971
2972 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2973 {
2974         __be32 *p;
2975         int status = 0;
2976
2977         *res = 0;
2978         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
2979                 return -EIO;
2980         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
2981                 READ_BUF(8);
2982                 READ64(*res);
2983                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
2984         }
2985         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
2986         return status;
2987 }
2988
2989 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2990 {
2991         __be32 *p;
2992         int status = 0;
2993
2994         *res = 0;
2995         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
2996                 return -EIO;
2997         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
2998                 READ_BUF(8);
2999                 READ64(*res);
3000                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3001         }
3002         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3003         return status;
3004 }
3005
3006 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3007 {
3008         __be32 *p;
3009         int ret = 0;
3010
3011         *used = 0;
3012         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3013                 return -EIO;
3014         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3015                 READ_BUF(8);
3016                 READ64(*used);
3017                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3018                 ret = NFS_ATTR_FATTR_SPACE_USED;
3019         }
3020         dprintk("%s: space used=%Lu\n", __func__,
3021                         (unsigned long long)*used);
3022         return ret;
3023 }
3024
3025 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
3026 {
3027         __be32 *p;
3028         uint64_t sec;
3029         uint32_t nsec;
3030
3031         READ_BUF(12);
3032         READ64(sec);
3033         READ32(nsec);
3034         time->tv_sec = (time_t)sec;
3035         time->tv_nsec = (long)nsec;
3036         return 0;
3037 }
3038
3039 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3040 {
3041         int status = 0;
3042
3043         time->tv_sec = 0;
3044         time->tv_nsec = 0;
3045         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
3046                 return -EIO;
3047         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
3048                 status = decode_attr_time(xdr, time);
3049                 if (status == 0)
3050                         status = NFS_ATTR_FATTR_ATIME;
3051                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
3052         }
3053         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
3054         return status;
3055 }
3056
3057 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3058 {
3059         int status = 0;
3060
3061         time->tv_sec = 0;
3062         time->tv_nsec = 0;
3063         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
3064                 return -EIO;
3065         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
3066                 status = decode_attr_time(xdr, time);
3067                 if (status == 0)
3068                         status = NFS_ATTR_FATTR_CTIME;
3069                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
3070         }
3071         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
3072         return status;
3073 }
3074
3075 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3076 {
3077         int status = 0;
3078
3079         time->tv_sec = 0;
3080         time->tv_nsec = 0;
3081         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
3082                 return -EIO;
3083         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
3084                 status = decode_attr_time(xdr, time);
3085                 if (status == 0)
3086                         status = NFS_ATTR_FATTR_MTIME;
3087                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
3088         }
3089         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
3090         return status;
3091 }
3092
3093 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
3094 {
3095         unsigned int attrwords = XDR_QUADLEN(attrlen);
3096         unsigned int nwords = xdr->p - savep;
3097
3098         if (unlikely(attrwords != nwords)) {
3099                 dprintk("%s: server returned incorrect attribute length: "
3100                         "%u %c %u\n",
3101                                 __func__,
3102                                 attrwords << 2,
3103                                 (attrwords < nwords) ? '<' : '>',
3104                                 nwords << 2);
3105                 return -EIO;
3106         }
3107         return 0;
3108 }
3109
3110 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3111 {
3112         __be32 *p;
3113
3114         READ_BUF(20);
3115         READ32(cinfo->atomic);
3116         READ64(cinfo->before);
3117         READ64(cinfo->after);
3118         return 0;
3119 }
3120
3121 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
3122 {
3123         __be32 *p;
3124         uint32_t supp, acc;
3125         int status;
3126
3127         status = decode_op_hdr(xdr, OP_ACCESS);
3128         if (status)
3129                 return status;
3130         READ_BUF(8);
3131         READ32(supp);
3132         READ32(acc);
3133         access->supported = supp;
3134         access->access = acc;
3135         return 0;
3136 }
3137
3138 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
3139 {
3140         __be32 *p;
3141         int status;
3142
3143         status = decode_op_hdr(xdr, OP_CLOSE);
3144         if (status != -EIO)
3145                 nfs_increment_open_seqid(status, res->seqid);
3146         if (status)
3147                 return status;
3148         READ_BUF(NFS4_STATEID_SIZE);
3149         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3150         return 0;
3151 }
3152
3153 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
3154 {
3155         __be32 *p;
3156         int status;
3157
3158         status = decode_op_hdr(xdr, OP_COMMIT);
3159         if (status)
3160                 return status;
3161         READ_BUF(8);
3162         COPYMEM(res->verf->verifier, 8);
3163         return 0;
3164 }
3165
3166 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3167 {
3168         __be32 *p;
3169         uint32_t bmlen;
3170         int status;
3171
3172         status = decode_op_hdr(xdr, OP_CREATE);
3173         if (status)
3174                 return status;
3175         if ((status = decode_change_info(xdr, cinfo)))
3176                 return status;
3177         READ_BUF(4);
3178         READ32(bmlen);
3179         READ_BUF(bmlen << 2);
3180         return 0;
3181 }
3182
3183 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
3184 {
3185         __be32 *savep;
3186         uint32_t attrlen, bitmap[2] = {0};
3187         int status;
3188
3189         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3190                 goto xdr_error;
3191         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3192                 goto xdr_error;
3193         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3194                 goto xdr_error;
3195         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
3196                 goto xdr_error;
3197         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
3198                 goto xdr_error;
3199         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
3200                 goto xdr_error;
3201         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
3202                 goto xdr_error;
3203         status = verify_attr_len(xdr, savep, attrlen);
3204 xdr_error:
3205         dprintk("%s: xdr returned %d!\n", __func__, -status);
3206         return status;
3207 }
3208
3209 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
3210 {
3211         __be32 *savep;
3212         uint32_t attrlen, bitmap[2] = {0};
3213         int status;
3214
3215         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3216                 goto xdr_error;
3217         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3218                 goto xdr_error;
3219         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3220                 goto xdr_error;
3221
3222         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
3223                 goto xdr_error;
3224         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
3225                 goto xdr_error;
3226         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
3227                 goto xdr_error;
3228         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
3229                 goto xdr_error;
3230         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
3231                 goto xdr_error;
3232         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
3233                 goto xdr_error;
3234
3235         status = verify_attr_len(xdr, savep, attrlen);
3236 xdr_error:
3237         dprintk("%s: xdr returned %d!\n", __func__, -status);
3238         return status;
3239 }
3240
3241 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
3242 {
3243         __be32 *savep;
3244         uint32_t attrlen, bitmap[2] = {0};
3245         int status;
3246
3247         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3248                 goto xdr_error;
3249         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3250                 goto xdr_error;
3251         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3252                 goto xdr_error;
3253
3254         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
3255                 goto xdr_error;
3256         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
3257                 goto xdr_error;
3258
3259         status = verify_attr_len(xdr, savep, attrlen);
3260 xdr_error:
3261         dprintk("%s: xdr returned %d!\n", __func__, -status);
3262         return status;
3263 }
3264
3265 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr, const struct nfs_server *server)
3266 {
3267         __be32 *savep;
3268         uint32_t attrlen,
3269                  bitmap[2] = {0},
3270                  type;
3271         int status;
3272         umode_t fmode = 0;
3273         uint64_t fileid;
3274
3275         status = decode_op_hdr(xdr, OP_GETATTR);
3276         if (status < 0)
3277                 goto xdr_error;
3278
3279         status = decode_attr_bitmap(xdr, bitmap);
3280         if (status < 0)
3281                 goto xdr_error;
3282
3283         status = decode_attr_length(xdr, &attrlen, &savep);
3284         if (status < 0)
3285                 goto xdr_error;
3286
3287
3288         status = decode_attr_type(xdr, bitmap, &type);
3289         if (status < 0)
3290                 goto xdr_error;
3291         fattr->mode = 0;
3292         if (status != 0) {
3293                 fattr->mode |= nfs_type2fmt[type];
3294                 fattr->valid |= status;
3295         }
3296
3297         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
3298         if (status < 0)
3299                 goto xdr_error;
3300         fattr->valid |= status;
3301
3302         status = decode_attr_size(xdr, bitmap, &fattr->size);
3303         if (status < 0)
3304                 goto xdr_error;
3305         fattr->valid |= status;
3306
3307         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
3308         if (status < 0)
3309                 goto xdr_error;
3310         fattr->valid |= status;
3311
3312         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
3313         if (status < 0)
3314                 goto xdr_error;
3315         fattr->valid |= status;
3316
3317         status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
3318                                                 struct nfs4_fs_locations,
3319                                                 fattr));
3320         if (status < 0)
3321                 goto xdr_error;
3322         fattr->valid |= status;
3323
3324         status = decode_attr_mode(xdr, bitmap, &fmode);
3325         if (status < 0)
3326                 goto xdr_error;
3327         if (status != 0) {
3328                 fattr->mode |= fmode;
3329                 fattr->valid |= status;
3330         }
3331
3332         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
3333         if (status < 0)
3334                 goto xdr_error;
3335         fattr->valid |= status;
3336
3337         status = decode_attr_owner(xdr, bitmap, server->nfs_client, &fattr->uid);
3338         if (status < 0)
3339                 goto xdr_error;
3340         fattr->valid |= status;
3341
3342         status = decode_attr_group(xdr, bitmap, server->nfs_client, &fattr->gid);
3343         if (status < 0)
3344                 goto xdr_error;
3345         fattr->valid |= status;
3346
3347         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
3348         if (status < 0)
3349                 goto xdr_error;
3350         fattr->valid |= status;
3351
3352         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
3353         if (status < 0)
3354                 goto xdr_error;
3355         fattr->valid |= status;
3356
3357         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
3358         if (status < 0)
3359                 goto xdr_error;
3360         fattr->valid |= status;
3361
3362         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
3363         if (status < 0)
3364                 goto xdr_error;
3365         fattr->valid |= status;
3366
3367         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
3368         if (status < 0)
3369                 goto xdr_error;
3370         fattr->valid |= status;
3371
3372         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid);
3373         if (status < 0)
3374                 goto xdr_error;
3375         if (status != 0 && !(fattr->valid & status)) {
3376                 fattr->fileid = fileid;
3377                 fattr->valid |= status;
3378         }
3379
3380         status = verify_attr_len(xdr, savep, attrlen);
3381 xdr_error:
3382         dprintk("%s: xdr returned %d\n", __func__, -status);
3383         return status;
3384 }
3385
3386
3387 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
3388 {
3389         __be32 *savep;
3390         uint32_t attrlen, bitmap[2];
3391         int status;
3392
3393         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3394                 goto xdr_error;
3395         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3396                 goto xdr_error;
3397         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3398                 goto xdr_error;
3399
3400         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
3401
3402         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
3403                 goto xdr_error;
3404         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
3405                 goto xdr_error;
3406         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
3407                 goto xdr_error;
3408         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
3409         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
3410                 goto xdr_error;
3411         fsinfo->wtpref = fsinfo->wtmax;
3412
3413         status = verify_attr_len(xdr, savep, attrlen);
3414 xdr_error:
3415         dprintk("%s: xdr returned %d!\n", __func__, -status);
3416         return status;
3417 }
3418
3419 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
3420 {
3421         __be32 *p;
3422         uint32_t len;
3423         int status;
3424
3425         /* Zero handle first to allow comparisons */
3426         memset(fh, 0, sizeof(*fh));
3427
3428         status = decode_op_hdr(xdr, OP_GETFH);
3429         if (status)
3430                 return status;
3431
3432         READ_BUF(4);
3433         READ32(len);
3434         if (len > NFS4_FHSIZE)
3435                 return -EIO;
3436         fh->size = len;
3437         READ_BUF(len);
3438         COPYMEM(fh->data, len);
3439         return 0;
3440 }
3441
3442 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3443 {
3444         int status;
3445
3446         status = decode_op_hdr(xdr, OP_LINK);
3447         if (status)
3448                 return status;
3449         return decode_change_info(xdr, cinfo);
3450 }
3451
3452 /*
3453  * We create the owner, so we know a proper owner.id length is 4.
3454  */
3455 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
3456 {
3457         uint64_t offset, length, clientid;
3458         __be32 *p;
3459         uint32_t namelen, type;
3460
3461         READ_BUF(32);
3462         READ64(offset);
3463         READ64(length);
3464         READ32(type);
3465         if (fl != NULL) {
3466                 fl->fl_start = (loff_t)offset;
3467                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
3468                 if (length == ~(uint64_t)0)
3469                         fl->fl_end = OFFSET_MAX;
3470                 fl->fl_type = F_WRLCK;
3471                 if (type & 1)
3472                         fl->fl_type = F_RDLCK;
3473                 fl->fl_pid = 0;
3474         }
3475         READ64(clientid);
3476         READ32(namelen);
3477         READ_BUF(namelen);
3478         return -NFS4ERR_DENIED;
3479 }
3480
3481 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
3482 {
3483         __be32 *p;
3484         int status;
3485
3486         status = decode_op_hdr(xdr, OP_LOCK);
3487         if (status == -EIO)
3488                 goto out;
3489         if (status == 0) {
3490                 READ_BUF(NFS4_STATEID_SIZE);
3491                 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3492         } else if (status == -NFS4ERR_DENIED)
3493                 status = decode_lock_denied(xdr, NULL);
3494         if (res->open_seqid != NULL)
3495                 nfs_increment_open_seqid(status, res->open_seqid);
3496         nfs_increment_lock_seqid(status, res->lock_seqid);
3497 out:
3498         return status;
3499 }
3500
3501 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
3502 {
3503         int status;
3504         status = decode_op_hdr(xdr, OP_LOCKT);
3505         if (status == -NFS4ERR_DENIED)
3506                 return decode_lock_denied(xdr, res->denied);
3507         return status;
3508 }
3509
3510 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
3511 {
3512         __be32 *p;
3513         int status;
3514
3515         status = decode_op_hdr(xdr, OP_LOCKU);
3516         if (status != -EIO)
3517                 nfs_increment_lock_seqid(status, res->seqid);
3518         if (status == 0) {
3519                 READ_BUF(NFS4_STATEID_SIZE);
3520                 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3521         }
3522         return status;
3523 }
3524
3525 static int decode_lookup(struct xdr_stream *xdr)
3526 {
3527         return decode_op_hdr(xdr, OP_LOOKUP);
3528 }
3529
3530 /* This is too sick! */
3531 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
3532 {
3533         __be32 *p;
3534         uint32_t limit_type, nblocks, blocksize;
3535
3536         READ_BUF(12);
3537         READ32(limit_type);
3538         switch (limit_type) {
3539         case 1:
3540                 READ64(*maxsize);
3541                 break;
3542         case 2:
3543                 READ32(nblocks);
3544                 READ32(blocksize);
3545                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
3546         }
3547         return 0;
3548 }
3549
3550 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
3551 {
3552         __be32 *p;
3553         uint32_t delegation_type;
3554
3555         READ_BUF(4);
3556         READ32(delegation_type);
3557         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
3558                 res->delegation_type = 0;
3559                 return 0;
3560         }
3561         READ_BUF(NFS4_STATEID_SIZE+4);
3562         COPYMEM(res->delegation.data, NFS4_STATEID_SIZE);
3563         READ32(res->do_recall);
3564
3565         switch (delegation_type) {
3566         case NFS4_OPEN_DELEGATE_READ:
3567                 res->delegation_type = FMODE_READ;
3568                 break;
3569         case NFS4_OPEN_DELEGATE_WRITE:
3570                 res->delegation_type = FMODE_WRITE|FMODE_READ;
3571                 if (decode_space_limit(xdr, &res->maxsize) < 0)
3572                                 return -EIO;
3573         }
3574         return decode_ace(xdr, NULL, res->server->nfs_client);
3575 }
3576
3577 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
3578 {
3579         __be32 *p;
3580         uint32_t savewords, bmlen, i;
3581         int status;
3582
3583         status = decode_op_hdr(xdr, OP_OPEN);
3584         if (status != -EIO)
3585                 nfs_increment_open_seqid(status, res->seqid);
3586         if (status)
3587                 return status;
3588         READ_BUF(NFS4_STATEID_SIZE);
3589         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3590
3591         decode_change_info(xdr, &res->cinfo);
3592
3593         READ_BUF(8);
3594         READ32(res->rflags);
3595         READ32(bmlen);
3596         if (bmlen > 10)
3597                 goto xdr_error;
3598
3599         READ_BUF(bmlen << 2);
3600         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
3601         for (i = 0; i < savewords; ++i)
3602                 READ32(res->attrset[i]);
3603         for (; i < NFS4_BITMAP_SIZE; i++)
3604                 res->attrset[i] = 0;
3605
3606         return decode_delegation(xdr, res);
3607 xdr_error:
3608         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
3609         return -EIO;
3610 }
3611
3612 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
3613 {
3614         __be32 *p;
3615         int status;
3616
3617         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
3618         if (status != -EIO)
3619                 nfs_increment_open_seqid(status, res->seqid);
3620         if (status)
3621                 return status;
3622         READ_BUF(NFS4_STATEID_SIZE);
3623         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3624         return 0;
3625 }
3626
3627 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
3628 {
3629         __be32 *p;
3630         int status;
3631
3632         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
3633         if (status != -EIO)
3634                 nfs_increment_open_seqid(status, res->seqid);
3635         if (status)
3636                 return status;
3637         READ_BUF(NFS4_STATEID_SIZE);
3638         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3639         return 0;
3640 }
3641
3642 static int decode_putfh(struct xdr_stream *xdr)
3643 {
3644         return decode_op_hdr(xdr, OP_PUTFH);
3645 }
3646
3647 static int decode_putrootfh(struct xdr_stream *xdr)
3648 {
3649         return decode_op_hdr(xdr, OP_PUTROOTFH);
3650 }
3651
3652 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
3653 {
3654         struct kvec *iov = req->rq_rcv_buf.head;
3655         __be32 *p;
3656         uint32_t count, eof, recvd, hdrlen;
3657         int status;
3658
3659         status = decode_op_hdr(xdr, OP_READ);
3660         if (status)
3661                 return status;
3662         READ_BUF(8);
3663         READ32(eof);
3664         READ32(count);
3665         hdrlen = (u8 *) p - (u8 *) iov->iov_base;
3666         recvd = req->rq_rcv_buf.len - hdrlen;
3667         if (count > recvd) {
3668                 dprintk("NFS: server cheating in read reply: "
3669                                 "count %u > recvd %u\n", count, recvd);
3670                 count = recvd;
3671                 eof = 0;
3672         }
3673         xdr_read_pages(xdr, count);
3674         res->eof = eof;
3675         res->count = count;
3676         return 0;
3677 }
3678
3679 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
3680 {
3681         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
3682         struct page     *page = *rcvbuf->pages;
3683         struct kvec     *iov = rcvbuf->head;
3684         size_t          hdrlen;
3685         u32             recvd, pglen = rcvbuf->page_len;
3686         __be32          *end, *entry, *p, *kaddr;
3687         unsigned int    nr = 0;
3688         int             status;
3689
3690         status = decode_op_hdr(xdr, OP_READDIR);
3691         if (status)
3692                 return status;
3693         READ_BUF(8);
3694         COPYMEM(readdir->verifier.data, 8);
3695         dprintk("%s: verifier = %08x:%08x\n",
3696                         __func__,
3697                         ((u32 *)readdir->verifier.data)[0],
3698                         ((u32 *)readdir->verifier.data)[1]);
3699
3700
3701         hdrlen = (char *) p - (char *) iov->iov_base;
3702         recvd = rcvbuf->len - hdrlen;
3703         if (pglen > recvd)
3704                 pglen = recvd;
3705         xdr_read_pages(xdr, pglen);
3706
3707         BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
3708         kaddr = p = kmap_atomic(page, KM_USER0);
3709         end = p + ((pglen + readdir->pgbase) >> 2);
3710         entry = p;
3711
3712         /* Make sure the packet actually has a value_follows and EOF entry */
3713         if ((entry + 1) > end)
3714                 goto short_pkt;
3715
3716         for (; *p++; nr++) {
3717                 u32 len, attrlen, xlen;
3718                 if (end - p < 3)
3719                         goto short_pkt;
3720                 dprintk("cookie = %Lu, ", *((unsigned long long *)p));
3721                 p += 2;                 /* cookie */
3722                 len = ntohl(*p++);      /* filename length */
3723                 if (len > NFS4_MAXNAMLEN) {
3724                         dprintk("NFS: giant filename in readdir (len 0x%x)\n",
3725                                         len);
3726                         goto err_unmap;
3727                 }
3728                 xlen = XDR_QUADLEN(len);
3729                 if (end - p < xlen + 1)
3730                         goto short_pkt;
3731                 dprintk("filename = %*s\n", len, (char *)p);
3732                 p += xlen;
3733                 len = ntohl(*p++);      /* bitmap length */
3734                 if (end - p < len + 1)
3735                         goto short_pkt;
3736                 p += len;
3737                 attrlen = XDR_QUADLEN(ntohl(*p++));
3738                 if (end - p < attrlen + 2)
3739                         goto short_pkt;
3740                 p += attrlen;           /* attributes */
3741                 entry = p;
3742         }
3743         /*
3744          * Apparently some server sends responses that are a valid size, but
3745          * contain no entries, and have value_follows==0 and EOF==0. For
3746          * those, just set the EOF marker.
3747          */
3748         if (!nr && entry[1] == 0) {
3749                 dprintk("NFS: readdir reply truncated!\n");
3750                 entry[1] = 1;
3751         }
3752 out:
3753         kunmap_atomic(kaddr, KM_USER0);
3754         return 0;
3755 short_pkt:
3756         /*
3757          * When we get a short packet there are 2 possibilities. We can
3758          * return an error, or fix up the response to look like a valid
3759          * response and return what we have so far. If there are no
3760          * entries and the packet was short, then return -EIO. If there
3761          * are valid entries in the response, return them and pretend that
3762          * the call was successful, but incomplete. The caller can retry the
3763          * readdir starting at the last cookie.
3764          */
3765         dprintk("%s: short packet at entry %d\n", __func__, nr);
3766         entry[0] = entry[1] = 0;
3767         if (nr)
3768                 goto out;
3769 err_unmap:
3770         kunmap_atomic(kaddr, KM_USER0);
3771         return -errno_NFSERR_IO;
3772 }
3773
3774 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
3775 {
3776         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
3777         struct kvec *iov = rcvbuf->head;
3778         size_t hdrlen;
3779         u32 len, recvd;
3780         __be32 *p;
3781         char *kaddr;
3782         int status;
3783
3784         status = decode_op_hdr(xdr, OP_READLINK);
3785         if (status)
3786                 return status;
3787
3788         /* Convert length of symlink */
3789         READ_BUF(4);
3790         READ32(len);
3791         if (len >= rcvbuf->page_len || len <= 0) {
3792                 dprintk("nfs: server returned giant symlink!\n");
3793                 return -ENAMETOOLONG;
3794         }
3795         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
3796         recvd = req->rq_rcv_buf.len - hdrlen;
3797         if (recvd < len) {
3798                 dprintk("NFS: server cheating in readlink reply: "
3799                                 "count %u > recvd %u\n", len, recvd);
3800                 return -EIO;
3801         }
3802         xdr_read_pages(xdr, len);
3803         /*
3804          * The XDR encode routine has set things up so that
3805          * the link text will be copied directly into the
3806          * buffer.  We just have to do overflow-checking,
3807          * and and null-terminate the text (the VFS expects
3808          * null-termination).
3809          */
3810         kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
3811         kaddr[len+rcvbuf->page_base] = '\0';
3812         kunmap_atomic(kaddr, KM_USER0);
3813         return 0;
3814 }
3815
3816 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3817 {
3818         int status;
3819
3820         status = decode_op_hdr(xdr, OP_REMOVE);
3821         if (status)
3822                 goto out;
3823         status = decode_change_info(xdr, cinfo);
3824 out:
3825         return status;
3826 }
3827
3828 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
3829               struct nfs4_change_info *new_cinfo)
3830 {
3831         int status;
3832
3833         status = decode_op_hdr(xdr, OP_RENAME);
3834         if (status)
3835                 goto out;
3836         if ((status = decode_change_info(xdr, old_cinfo)))
3837                 goto out;
3838         status = decode_change_info(xdr, new_cinfo);
3839 out:
3840         return status;
3841 }
3842
3843 static int decode_renew(struct xdr_stream *xdr)
3844 {
3845         return decode_op_hdr(xdr, OP_RENEW);
3846 }
3847
3848 static int
3849 decode_restorefh(struct xdr_stream *xdr)
3850 {
3851         return decode_op_hdr(xdr, OP_RESTOREFH);
3852 }
3853
3854 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
3855                 size_t *acl_len)
3856 {
3857         __be32 *savep;
3858         uint32_t attrlen,
3859                  bitmap[2] = {0};
3860         struct kvec *iov = req->rq_rcv_buf.head;
3861         int status;
3862
3863         *acl_len = 0;
3864         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3865                 goto out;
3866         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3867                 goto out;
3868         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3869                 goto out;
3870
3871         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
3872                 return -EIO;
3873         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
3874                 size_t hdrlen;
3875                 u32 recvd;
3876
3877                 /* We ignore &savep and don't do consistency checks on
3878                  * the attr length.  Let userspace figure it out.... */
3879                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
3880                 recvd = req->rq_rcv_buf.len - hdrlen;
3881                 if (attrlen > recvd) {
3882                         dprintk("NFS: server cheating in getattr"
3883                                         " acl reply: attrlen %u > recvd %u\n",
3884                                         attrlen, recvd);
3885                         return -EINVAL;
3886                 }
3887                 xdr_read_pages(xdr, attrlen);
3888                 *acl_len = attrlen;
3889         } else
3890                 status = -EOPNOTSUPP;
3891
3892 out:
3893         return status;
3894 }
3895
3896 static int
3897 decode_savefh(struct xdr_stream *xdr)
3898 {
3899         return decode_op_hdr(xdr, OP_SAVEFH);
3900 }
3901
3902 static int decode_setattr(struct xdr_stream *xdr)
3903 {
3904         __be32 *p;
3905         uint32_t bmlen;
3906         int status;
3907
3908         status = decode_op_hdr(xdr, OP_SETATTR);
3909         if (status)
3910                 return status;
3911         READ_BUF(4);
3912         READ32(bmlen);
3913         READ_BUF(bmlen << 2);
3914         return 0;
3915 }
3916
3917 static int decode_setclientid(struct xdr_stream *xdr, struct nfs_client *clp)
3918 {
3919         __be32 *p;
3920         uint32_t opnum;
3921         int32_t nfserr;
3922
3923         READ_BUF(8);
3924         READ32(opnum);
3925         if (opnum != OP_SETCLIENTID) {
3926                 dprintk("nfs: decode_setclientid: Server returned operation"
3927                         " %d\n", opnum);
3928                 return -EIO;
3929         }
3930         READ32(nfserr);
3931         if (nfserr == NFS_OK) {
3932                 READ_BUF(8 + NFS4_VERIFIER_SIZE);
3933                 READ64(clp->cl_clientid);
3934                 COPYMEM(clp->cl_confirm.data, NFS4_VERIFIER_SIZE);
3935         } else if (nfserr == NFSERR_CLID_INUSE) {
3936                 uint32_t len;
3937
3938                 /* skip netid string */
3939                 READ_BUF(4);
3940                 READ32(len);
3941                 READ_BUF(len);
3942
3943                 /* skip uaddr string */
3944                 READ_BUF(4);
3945                 READ32(len);
3946                 READ_BUF(len);
3947                 return -NFSERR_CLID_INUSE;
3948         } else
3949                 return nfs4_stat_to_errno(nfserr);
3950
3951         return 0;
3952 }
3953
3954 static int decode_setclientid_confirm(struct xdr_stream *xdr)
3955 {
3956         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
3957 }
3958
3959 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
3960 {
3961         __be32 *p;
3962         int status;
3963
3964         status = decode_op_hdr(xdr, OP_WRITE);
3965         if (status)
3966                 return status;
3967
3968         READ_BUF(16);
3969         READ32(res->count);
3970         READ32(res->verf->committed);
3971         COPYMEM(res->verf->verifier, 8);
3972         return 0;
3973 }
3974
3975 static int decode_delegreturn(struct xdr_stream *xdr)
3976 {
3977         return decode_op_hdr(xdr, OP_DELEGRETURN);
3978 }
3979
3980 #if defined(CONFIG_NFS_V4_1)
3981 static int decode_exchange_id(struct xdr_stream *xdr,
3982                               struct nfs41_exchange_id_res *res)
3983 {
3984         __be32 *p;
3985         uint32_t dummy;
3986         int status;
3987         struct nfs_client *clp = res->client;
3988
3989         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
3990         if (status)
3991                 return status;
3992
3993         READ_BUF(8);
3994         READ64(clp->cl_ex_clid);
3995         READ_BUF(12);
3996         READ32(clp->cl_seqid);
3997         READ32(clp->cl_exchange_flags);
3998
3999         /* We ask for SP4_NONE */
4000         READ32(dummy);
4001         if (dummy != SP4_NONE)
4002                 return -EIO;
4003
4004         /* Throw away minor_id */
4005         READ_BUF(8);
4006
4007         /* Throw away Major id */
4008         READ_BUF(4);
4009         READ32(dummy);
4010         READ_BUF(dummy);
4011
4012         /* Throw away server_scope */
4013         READ_BUF(4);
4014         READ32(dummy);
4015         READ_BUF(dummy);
4016
4017         /* Throw away Implementation id array */
4018         READ_BUF(4);
4019         READ32(dummy);
4020         READ_BUF(dummy);
4021
4022         return 0;
4023 }
4024 #endif /* CONFIG_NFS_V4_1 */
4025
4026 static int decode_sequence(struct xdr_stream *xdr,
4027                            struct nfs4_sequence_res *res,
4028                            struct rpc_rqst *rqstp)
4029 {
4030 #if defined(CONFIG_NFS_V4_1)
4031         if (!res->sr_session)
4032                 return 0;
4033
4034         /* stub */
4035 #endif /* CONFIG_NFS_V4_1 */
4036
4037         return 0;
4038 }
4039
4040 /*
4041  * END OF "GENERIC" DECODE ROUTINES.
4042  */
4043
4044 /*
4045  * Decode OPEN_DOWNGRADE response
4046  */
4047 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
4048 {
4049         struct xdr_stream xdr;
4050         struct compound_hdr hdr;
4051         int status;
4052
4053         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4054         status = decode_compound_hdr(&xdr, &hdr);
4055         if (status)
4056                 goto out;
4057         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4058         if (status)
4059                 goto out;
4060         status = decode_putfh(&xdr);
4061         if (status)
4062                 goto out;
4063         status = decode_open_downgrade(&xdr, res);
4064         if (status != 0)
4065                 goto out;
4066         decode_getfattr(&xdr, res->fattr, res->server);
4067 out:
4068         return status;
4069 }
4070
4071 /*
4072  * Decode ACCESS response
4073  */
4074 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_accessres *res)
4075 {
4076         struct xdr_stream xdr;
4077         struct compound_hdr hdr;
4078         int status;
4079
4080         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4081         status = decode_compound_hdr(&xdr, &hdr);
4082         if (status)
4083                 goto out;
4084         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4085         if (status)
4086                 goto out;
4087         status = decode_putfh(&xdr);
4088         if (status != 0)
4089                 goto out;
4090         status = decode_access(&xdr, res);
4091         if (status != 0)
4092                 goto out;
4093         decode_getfattr(&xdr, res->fattr, res->server);
4094 out:
4095         return status;
4096 }
4097
4098 /*
4099  * Decode LOOKUP response
4100  */
4101 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
4102 {
4103         struct xdr_stream xdr;
4104         struct compound_hdr hdr;
4105         int status;
4106
4107         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4108         status = decode_compound_hdr(&xdr, &hdr);
4109         if (status)
4110                 goto out;
4111         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4112         if (status)
4113                 goto out;
4114         if ((status = decode_putfh(&xdr)) != 0)
4115                 goto out;
4116         if ((status = decode_lookup(&xdr)) != 0)
4117                 goto out;
4118         if ((status = decode_getfh(&xdr, res->fh)) != 0)
4119                 goto out;
4120         status = decode_getfattr(&xdr, res->fattr, res->server);
4121 out:
4122         return status;
4123 }
4124
4125 /*
4126  * Decode LOOKUP_ROOT response
4127  */
4128 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
4129 {
4130         struct xdr_stream xdr;
4131         struct compound_hdr hdr;
4132         int status;
4133
4134         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4135         status = decode_compound_hdr(&xdr, &hdr);
4136         if (status)
4137                 goto out;
4138         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4139         if (status)
4140                 goto out;
4141         if ((status = decode_putrootfh(&xdr)) != 0)
4142                 goto out;
4143         if ((status = decode_getfh(&xdr, res->fh)) == 0)
4144                 status = decode_getfattr(&xdr, res->fattr, res->server);
4145 out:
4146         return status;
4147 }
4148
4149 /*
4150  * Decode REMOVE response
4151  */
4152 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, __be32 *p, struct nfs_removeres *res)
4153 {
4154         struct xdr_stream xdr;
4155         struct compound_hdr hdr;
4156         int status;
4157
4158         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4159         status = decode_compound_hdr(&xdr, &hdr);
4160         if (status)
4161                 goto out;
4162         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4163         if (status)
4164                 goto out;
4165         if ((status = decode_putfh(&xdr)) != 0)
4166                 goto out;
4167         if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
4168                 goto out;
4169         decode_getfattr(&xdr, &res->dir_attr, res->server);
4170 out:
4171         return status;
4172 }
4173
4174 /*
4175  * Decode RENAME response
4176  */
4177 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_rename_res *res)
4178 {
4179         struct xdr_stream xdr;
4180         struct compound_hdr hdr;
4181         int status;
4182
4183         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4184         status = decode_compound_hdr(&xdr, &hdr);
4185         if (status)
4186                 goto out;
4187         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4188         if (status)
4189                 goto out;
4190         if ((status = decode_putfh(&xdr)) != 0)
4191                 goto out;
4192         if ((status = decode_savefh(&xdr)) != 0)
4193                 goto out;
4194         if ((status = decode_putfh(&xdr)) != 0)
4195                 goto out;
4196         if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0)
4197                 goto out;
4198         /* Current FH is target directory */
4199         if (decode_getfattr(&xdr, res->new_fattr, res->server) != 0)
4200                 goto out;
4201         if ((status = decode_restorefh(&xdr)) != 0)
4202                 goto out;
4203         decode_getfattr(&xdr, res->old_fattr, res->server);
4204 out:
4205         return status;
4206 }
4207
4208 /*
4209  * Decode LINK response
4210  */
4211 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_link_res *res)
4212 {
4213         struct xdr_stream xdr;
4214         struct compound_hdr hdr;
4215         int status;
4216
4217         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4218         status = decode_compound_hdr(&xdr, &hdr);
4219         if (status)
4220                 goto out;
4221         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4222         if (status)
4223                 goto out;
4224         if ((status = decode_putfh(&xdr)) != 0)
4225                 goto out;
4226         if ((status = decode_savefh(&xdr)) != 0)
4227                 goto out;
4228         if ((status = decode_putfh(&xdr)) != 0)
4229                 goto out;
4230         if ((status = decode_link(&xdr, &res->cinfo)) != 0)
4231                 goto out;
4232         /*
4233          * Note order: OP_LINK leaves the directory as the current
4234          *             filehandle.
4235          */
4236         if (decode_getfattr(&xdr, res->dir_attr, res->server) != 0)
4237                 goto out;
4238         if ((status = decode_restorefh(&xdr)) != 0)
4239                 goto out;
4240         decode_getfattr(&xdr, res->fattr, res->server);
4241 out:
4242         return status;
4243 }
4244
4245 /*
4246  * Decode CREATE response
4247  */
4248 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
4249 {
4250         struct xdr_stream xdr;
4251         struct compound_hdr hdr;
4252         int status;
4253
4254         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4255         status = decode_compound_hdr(&xdr, &hdr);
4256         if (status)
4257                 goto out;
4258         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4259         if (status)
4260                 goto out;
4261         if ((status = decode_putfh(&xdr)) != 0)
4262                 goto out;
4263         if ((status = decode_savefh(&xdr)) != 0)
4264                 goto out;
4265         if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
4266                 goto out;
4267         if ((status = decode_getfh(&xdr, res->fh)) != 0)
4268                 goto out;
4269         if (decode_getfattr(&xdr, res->fattr, res->server) != 0)
4270                 goto out;
4271         if ((status = decode_restorefh(&xdr)) != 0)
4272                 goto out;
4273         decode_getfattr(&xdr, res->dir_fattr, res->server);
4274 out:
4275         return status;
4276 }
4277
4278 /*
4279  * Decode SYMLINK response
4280  */
4281 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
4282 {
4283         return nfs4_xdr_dec_create(rqstp, p, res);
4284 }
4285
4286 /*
4287  * Decode GETATTR response
4288  */
4289 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_getattr_res *res)
4290 {
4291         struct xdr_stream xdr;
4292         struct compound_hdr hdr;
4293         int status;
4294
4295         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4296         status = decode_compound_hdr(&xdr, &hdr);
4297         if (status)
4298                 goto out;
4299         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4300         if (status)
4301                 goto out;
4302         status = decode_putfh(&xdr);
4303         if (status)
4304                 goto out;
4305         status = decode_getfattr(&xdr, res->fattr, res->server);
4306 out:
4307         return status;
4308 }
4309
4310 /*
4311  * Encode an SETACL request
4312  */
4313 static int
4314 nfs4_xdr_enc_setacl(struct rpc_rqst *req, __be32 *p, struct nfs_setaclargs *args)
4315 {
4316         struct xdr_stream xdr;
4317         struct compound_hdr hdr = {
4318                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
4319         };
4320         int status;
4321
4322         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
4323         encode_compound_hdr(&xdr, req, &hdr);
4324         encode_sequence(&xdr, &args->seq_args, &hdr);
4325         encode_putfh(&xdr, args->fh, &hdr);
4326         status = encode_setacl(&xdr, args, &hdr);
4327         encode_nops(&hdr);
4328         return status;
4329 }
4330
4331 /*
4332  * Decode SETACL response
4333  */
4334 static int
4335 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, __be32 *p,
4336                     struct nfs_setaclres *res)
4337 {
4338         struct xdr_stream xdr;
4339         struct compound_hdr hdr;
4340         int status;
4341
4342         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4343         status = decode_compound_hdr(&xdr, &hdr);
4344         if (status)
4345                 goto out;
4346         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4347         if (status)
4348                 goto out;
4349         status = decode_putfh(&xdr);
4350         if (status)
4351                 goto out;
4352         status = decode_setattr(&xdr);
4353 out:
4354         return status;
4355 }
4356
4357 /*
4358  * Decode GETACL response
4359  */
4360 static int
4361 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, __be32 *p,
4362                     struct nfs_getaclres *res)
4363 {
4364         struct xdr_stream xdr;
4365         struct compound_hdr hdr;
4366         int status;
4367
4368         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4369         status = decode_compound_hdr(&xdr, &hdr);
4370         if (status)
4371                 goto out;
4372         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4373         if (status)
4374                 goto out;
4375         status = decode_putfh(&xdr);
4376         if (status)
4377                 goto out;
4378         status = decode_getacl(&xdr, rqstp, &res->acl_len);
4379
4380 out:
4381         return status;
4382 }
4383
4384 /*
4385  * Decode CLOSE response
4386  */
4387 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
4388 {
4389         struct xdr_stream xdr;
4390         struct compound_hdr hdr;
4391         int status;
4392
4393         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4394         status = decode_compound_hdr(&xdr, &hdr);
4395         if (status)
4396                 goto out;
4397         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4398         if (status)
4399                 goto out;
4400         status = decode_putfh(&xdr);
4401         if (status)
4402                 goto out;
4403         status = decode_close(&xdr, res);
4404         if (status != 0)
4405                 goto out;
4406         /*
4407          * Note: Server may do delete on close for this file
4408          *      in which case the getattr call will fail with
4409          *      an ESTALE error. Shouldn't be a problem,
4410          *      though, since fattr->valid will remain unset.
4411          */
4412         decode_getfattr(&xdr, res->fattr, res->server);
4413 out:
4414         return status;
4415 }
4416
4417 /*
4418  * Decode OPEN response
4419  */
4420 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4421 {
4422         struct xdr_stream xdr;
4423         struct compound_hdr hdr;
4424         int status;
4425
4426         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4427         status = decode_compound_hdr(&xdr, &hdr);
4428         if (status)
4429                 goto out;
4430         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4431         if (status)
4432                 goto out;
4433         status = decode_putfh(&xdr);
4434         if (status)
4435                 goto out;
4436         status = decode_savefh(&xdr);
4437         if (status)
4438                 goto out;
4439         status = decode_open(&xdr, res);
4440         if (status)
4441                 goto out;
4442         if (decode_getfh(&xdr, &res->fh) != 0)
4443                 goto out;
4444         if (decode_getfattr(&xdr, res->f_attr, res->server) != 0)
4445                 goto out;
4446         if (decode_restorefh(&xdr) != 0)
4447                 goto out;
4448         decode_getfattr(&xdr, res->dir_attr, res->server);
4449 out:
4450         return status;
4451 }
4452
4453 /*
4454  * Decode OPEN_CONFIRM response
4455  */
4456 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, __be32 *p, struct nfs_open_confirmres *res)
4457 {
4458         struct xdr_stream xdr;
4459         struct compound_hdr hdr;
4460         int status;
4461
4462         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4463         status = decode_compound_hdr(&xdr, &hdr);
4464         if (status)
4465                 goto out;
4466         status = decode_putfh(&xdr);
4467         if (status)
4468                 goto out;
4469         status = decode_open_confirm(&xdr, res);
4470 out:
4471         return status;
4472 }
4473
4474 /*
4475  * Decode OPEN response
4476  */
4477 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4478 {
4479         struct xdr_stream xdr;
4480         struct compound_hdr hdr;
4481         int status;
4482
4483         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4484         status = decode_compound_hdr(&xdr, &hdr);
4485         if (status)
4486                 goto out;
4487         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4488         if (status)
4489                 goto out;
4490         status = decode_putfh(&xdr);
4491         if (status)
4492                 goto out;
4493         status = decode_open(&xdr, res);
4494         if (status)
4495                 goto out;
4496         decode_getfattr(&xdr, res->f_attr, res->server);
4497 out:
4498         return status;
4499 }
4500
4501 /*
4502  * Decode SETATTR response
4503  */
4504 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_setattrres *res)
4505 {
4506         struct xdr_stream xdr;
4507         struct compound_hdr hdr;
4508         int status;
4509
4510         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4511         status = decode_compound_hdr(&xdr, &hdr);
4512         if (status)
4513                 goto out;
4514         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4515         if (status)
4516                 goto out;
4517         status = decode_putfh(&xdr);
4518         if (status)
4519                 goto out;
4520         status = decode_setattr(&xdr);
4521         if (status)
4522                 goto out;
4523         decode_getfattr(&xdr, res->fattr, res->server);
4524 out:
4525         return status;
4526 }
4527
4528 /*
4529  * Decode LOCK response
4530  */
4531 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lock_res *res)
4532 {
4533         struct xdr_stream xdr;
4534         struct compound_hdr hdr;
4535         int status;
4536
4537         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4538         status = decode_compound_hdr(&xdr, &hdr);
4539         if (status)
4540                 goto out;
4541         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4542         if (status)
4543                 goto out;
4544         status = decode_putfh(&xdr);
4545         if (status)
4546                 goto out;
4547         status = decode_lock(&xdr, res);
4548 out:
4549         return status;
4550 }
4551
4552 /*
4553  * Decode LOCKT response
4554  */
4555 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lockt_res *res)
4556 {
4557         struct xdr_stream xdr;
4558         struct compound_hdr hdr;
4559         int status;
4560
4561         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4562         status = decode_compound_hdr(&xdr, &hdr);
4563         if (status)
4564                 goto out;
4565         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4566         if (status)
4567                 goto out;
4568         status = decode_putfh(&xdr);
4569         if (status)
4570                 goto out;
4571         status = decode_lockt(&xdr, res);
4572 out:
4573         return status;
4574 }
4575
4576 /*
4577  * Decode LOCKU response
4578  */
4579 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, __be32 *p, struct nfs_locku_res *res)
4580 {
4581         struct xdr_stream xdr;
4582         struct compound_hdr hdr;
4583         int status;
4584
4585         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4586         status = decode_compound_hdr(&xdr, &hdr);
4587         if (status)
4588                 goto out;
4589         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4590         if (status)
4591                 goto out;
4592         status = decode_putfh(&xdr);
4593         if (status)
4594                 goto out;
4595         status = decode_locku(&xdr, res);
4596 out:
4597         return status;
4598 }
4599
4600 /*
4601  * Decode READLINK response
4602  */
4603 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, __be32 *p,
4604                                  struct nfs4_readlink_res *res)
4605 {
4606         struct xdr_stream xdr;
4607         struct compound_hdr hdr;
4608         int status;
4609
4610         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4611         status = decode_compound_hdr(&xdr, &hdr);
4612         if (status)
4613                 goto out;
4614         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4615         if (status)
4616                 goto out;
4617         status = decode_putfh(&xdr);
4618         if (status)
4619                 goto out;
4620         status = decode_readlink(&xdr, rqstp);
4621 out:
4622         return status;
4623 }
4624
4625 /*
4626  * Decode READDIR response
4627  */
4628 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_readdir_res *res)
4629 {
4630         struct xdr_stream xdr;
4631         struct compound_hdr hdr;
4632         int status;
4633
4634         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4635         status = decode_compound_hdr(&xdr, &hdr);
4636         if (status)
4637                 goto out;
4638         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4639         if (status)
4640                 goto out;
4641         status = decode_putfh(&xdr);
4642         if (status)
4643                 goto out;
4644         status = decode_readdir(&xdr, rqstp, res);
4645 out:
4646         return status;
4647 }
4648
4649 /*
4650  * Decode Read response
4651  */
4652 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, __be32 *p, struct nfs_readres *res)
4653 {
4654         struct xdr_stream xdr;
4655         struct compound_hdr hdr;
4656         int status;
4657
4658         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4659         status = decode_compound_hdr(&xdr, &hdr);
4660         if (status)
4661                 goto out;
4662         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4663         if (status)
4664                 goto out;
4665         status = decode_putfh(&xdr);
4666         if (status)
4667                 goto out;
4668         status = decode_read(&xdr, rqstp, res);
4669         if (!status)
4670                 status = res->count;
4671 out:
4672         return status;
4673 }
4674
4675 /*
4676  * Decode WRITE response
4677  */
4678 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
4679 {
4680         struct xdr_stream xdr;
4681         struct compound_hdr hdr;
4682         int status;
4683
4684         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4685         status = decode_compound_hdr(&xdr, &hdr);
4686         if (status)
4687                 goto out;
4688         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4689         if (status)
4690                 goto out;
4691         status = decode_putfh(&xdr);
4692         if (status)
4693                 goto out;
4694         status = decode_write(&xdr, res);
4695         if (status)
4696                 goto out;
4697         decode_getfattr(&xdr, res->fattr, res->server);
4698         if (!status)
4699                 status = res->count;
4700 out:
4701         return status;
4702 }
4703
4704 /*
4705  * Decode COMMIT response
4706  */
4707 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
4708 {
4709         struct xdr_stream xdr;
4710         struct compound_hdr hdr;
4711         int status;
4712
4713         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4714         status = decode_compound_hdr(&xdr, &hdr);
4715         if (status)
4716                 goto out;
4717         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4718         if (status)
4719                 goto out;
4720         status = decode_putfh(&xdr);
4721         if (status)
4722                 goto out;
4723         status = decode_commit(&xdr, res);
4724         if (status)
4725                 goto out;
4726         decode_getfattr(&xdr, res->fattr, res->server);
4727 out:
4728         return status;
4729 }
4730
4731 /*
4732  * FSINFO request
4733  */
4734 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, __be32 *p,
4735                                struct nfs4_fsinfo_res *res)
4736 {
4737         struct xdr_stream xdr;
4738         struct compound_hdr hdr;
4739         int status;
4740
4741         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4742         status = decode_compound_hdr(&xdr, &hdr);
4743         if (!status)
4744                 status = decode_sequence(&xdr, &res->seq_res, req);
4745         if (!status)
4746                 status = decode_putfh(&xdr);
4747         if (!status)
4748                 status = decode_fsinfo(&xdr, res->fsinfo);
4749         return status;
4750 }
4751
4752 /*
4753  * PATHCONF request
4754  */
4755 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, __be32 *p,
4756                                  struct nfs4_pathconf_res *res)
4757 {
4758         struct xdr_stream xdr;
4759         struct compound_hdr hdr;
4760         int status;
4761
4762         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4763         status = decode_compound_hdr(&xdr, &hdr);
4764         if (!status)
4765                 status = decode_sequence(&xdr, &res->seq_res, req);
4766         if (!status)
4767                 status = decode_putfh(&xdr);
4768         if (!status)
4769                 status = decode_pathconf(&xdr, res->pathconf);
4770         return status;
4771 }
4772
4773 /*
4774  * STATFS request
4775  */
4776 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, __be32 *p,
4777                                struct nfs4_statfs_res *res)
4778 {
4779         struct xdr_stream xdr;
4780         struct compound_hdr hdr;
4781         int status;
4782
4783         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4784         status = decode_compound_hdr(&xdr, &hdr);
4785         if (!status)
4786                 status = decode_sequence(&xdr, &res->seq_res, req);
4787         if (!status)
4788                 status = decode_putfh(&xdr);
4789         if (!status)
4790                 status = decode_statfs(&xdr, res->fsstat);
4791         return status;
4792 }
4793
4794 /*
4795  * GETATTR_BITMAP request
4796  */
4797 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, __be32 *p, struct nfs4_server_caps_res *res)
4798 {
4799         struct xdr_stream xdr;
4800         struct compound_hdr hdr;
4801         int status;
4802
4803         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4804         status = decode_compound_hdr(&xdr, &hdr);
4805         if (status)
4806                 goto out;
4807         status = decode_sequence(&xdr, &res->seq_res, req);
4808         if (status)
4809                 goto out;
4810         if ((status = decode_putfh(&xdr)) != 0)
4811                 goto out;
4812         status = decode_server_caps(&xdr, res);
4813 out:
4814         return status;
4815 }
4816
4817 /*
4818  * Decode RENEW response
4819  */
4820 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, __be32 *p, void *dummy)
4821 {
4822         struct xdr_stream xdr;
4823         struct compound_hdr hdr;
4824         int status;
4825
4826         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4827         status = decode_compound_hdr(&xdr, &hdr);
4828         if (!status)
4829                 status = decode_renew(&xdr);
4830         return status;
4831 }
4832
4833 /*
4834  * a SETCLIENTID request
4835  */
4836 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, __be32 *p,
4837                 struct nfs_client *clp)
4838 {
4839         struct xdr_stream xdr;
4840         struct compound_hdr hdr;
4841         int status;
4842
4843         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4844         status = decode_compound_hdr(&xdr, &hdr);
4845         if (!status)
4846                 status = decode_setclientid(&xdr, clp);
4847         return status;
4848 }
4849
4850 /*
4851  * a SETCLIENTID_CONFIRM request
4852  */
4853 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
4854 {
4855         struct xdr_stream xdr;
4856         struct compound_hdr hdr;
4857         int status;
4858
4859         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4860         status = decode_compound_hdr(&xdr, &hdr);
4861         if (!status)
4862                 status = decode_setclientid_confirm(&xdr);
4863         if (!status)
4864                 status = decode_putrootfh(&xdr);
4865         if (!status)
4866                 status = decode_fsinfo(&xdr, fsinfo);
4867         return status;
4868 }
4869
4870 /*
4871  * DELEGRETURN request
4872  */
4873 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_delegreturnres *res)
4874 {
4875         struct xdr_stream xdr;
4876         struct compound_hdr hdr;
4877         int status;
4878
4879         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4880         status = decode_compound_hdr(&xdr, &hdr);
4881         if (status)
4882                 goto out;
4883         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4884         if (status)
4885                 goto out;
4886         status = decode_putfh(&xdr);
4887         if (status != 0)
4888                 goto out;
4889         status = decode_delegreturn(&xdr);
4890         decode_getfattr(&xdr, res->fattr, res->server);
4891 out:
4892         return status;
4893 }
4894
4895 /*
4896  * FS_LOCATIONS request
4897  */
4898 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, __be32 *p,
4899                                      struct nfs4_fs_locations_res *res)
4900 {
4901         struct xdr_stream xdr;
4902         struct compound_hdr hdr;
4903         int status;
4904
4905         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4906         status = decode_compound_hdr(&xdr, &hdr);
4907         if (status)
4908                 goto out;
4909         status = decode_sequence(&xdr, &res->seq_res, req);
4910         if (status)
4911                 goto out;
4912         if ((status = decode_putfh(&xdr)) != 0)
4913                 goto out;
4914         if ((status = decode_lookup(&xdr)) != 0)
4915                 goto out;
4916         xdr_enter_page(&xdr, PAGE_SIZE);
4917         status = decode_getfattr(&xdr, &res->fs_locations->fattr,
4918                                  res->fs_locations->server);
4919 out:
4920         return status;
4921 }
4922
4923 #if defined(CONFIG_NFS_V4_1)
4924 /*
4925  * EXCHANGE_ID request
4926  */
4927 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp, uint32_t *p,
4928                                     void *res)
4929 {
4930         struct xdr_stream xdr;
4931         struct compound_hdr hdr;
4932         int status;
4933
4934         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4935         status = decode_compound_hdr(&xdr, &hdr);
4936         if (!status)
4937                 status = decode_exchange_id(&xdr, res);
4938         return status;
4939 }
4940
4941 /*
4942  * a GET_LEASE_TIME request
4943  */
4944 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp, uint32_t *p,
4945                                        struct nfs4_get_lease_time_res *res)
4946 {
4947         struct xdr_stream xdr;
4948         struct compound_hdr hdr;
4949         int status;
4950
4951         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4952         status = decode_compound_hdr(&xdr, &hdr);
4953         if (!status)
4954                 status = decode_sequence(&xdr, &res->lr_seq_res, rqstp);
4955         if (!status)
4956                 status = decode_putrootfh(&xdr);
4957         if (!status)
4958                 status = decode_fsinfo(&xdr, res->lr_fsinfo);
4959         return status;
4960 }
4961 #endif /* CONFIG_NFS_V4_1 */
4962
4963 __be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus)
4964 {
4965         uint32_t bitmap[2] = {0};
4966         uint32_t len;
4967
4968         if (!*p++) {
4969                 if (!*p)
4970                         return ERR_PTR(-EAGAIN);
4971                 entry->eof = 1;
4972                 return ERR_PTR(-EBADCOOKIE);
4973         }
4974
4975         entry->prev_cookie = entry->cookie;
4976         p = xdr_decode_hyper(p, &entry->cookie);
4977         entry->len = ntohl(*p++);
4978         entry->name = (const char *) p;
4979         p += XDR_QUADLEN(entry->len);
4980
4981         /*
4982          * In case the server doesn't return an inode number,
4983          * we fake one here.  (We don't use inode number 0,
4984          * since glibc seems to choke on it...)
4985          */
4986         entry->ino = 1;
4987
4988         len = ntohl(*p++);              /* bitmap length */
4989         if (len-- > 0) {
4990                 bitmap[0] = ntohl(*p++);
4991                 if (len-- > 0) {
4992                         bitmap[1] = ntohl(*p++);
4993                         p += len;
4994                 }
4995         }
4996         len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */
4997         if (len > 0) {
4998                 if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) {
4999                         bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
5000                         /* Ignore the return value of rdattr_error for now */
5001                         p++;
5002                         len--;
5003                 }
5004                 if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
5005                         xdr_decode_hyper(p, &entry->ino);
5006                 else if (bitmap[0] == FATTR4_WORD0_FILEID)
5007                         xdr_decode_hyper(p, &entry->ino);
5008                 p += len;
5009         }
5010
5011         entry->eof = !p[0] && p[1];
5012         return p;
5013 }
5014
5015 /*
5016  * We need to translate between nfs status return values and
5017  * the local errno values which may not be the same.
5018  */
5019 static struct {
5020         int stat;
5021         int errno;
5022 } nfs_errtbl[] = {
5023         { NFS4_OK,              0               },
5024         { NFS4ERR_PERM,         -EPERM          },
5025         { NFS4ERR_NOENT,        -ENOENT         },
5026         { NFS4ERR_IO,           -errno_NFSERR_IO},
5027         { NFS4ERR_NXIO,         -ENXIO          },
5028         { NFS4ERR_ACCESS,       -EACCES         },
5029         { NFS4ERR_EXIST,        -EEXIST         },
5030         { NFS4ERR_XDEV,         -EXDEV          },
5031         { NFS4ERR_NOTDIR,       -ENOTDIR        },
5032         { NFS4ERR_ISDIR,        -EISDIR         },
5033         { NFS4ERR_INVAL,        -EINVAL         },
5034         { NFS4ERR_FBIG,         -EFBIG          },
5035         { NFS4ERR_NOSPC,        -ENOSPC         },
5036         { NFS4ERR_ROFS,         -EROFS          },
5037         { NFS4ERR_MLINK,        -EMLINK         },
5038         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
5039         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
5040         { NFS4ERR_DQUOT,        -EDQUOT         },
5041         { NFS4ERR_STALE,        -ESTALE         },
5042         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
5043         { NFS4ERR_BADOWNER,     -EINVAL         },
5044         { NFS4ERR_BADNAME,      -EINVAL         },
5045         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
5046         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
5047         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
5048         { NFS4ERR_SERVERFAULT,  -ESERVERFAULT   },
5049         { NFS4ERR_BADTYPE,      -EBADTYPE       },
5050         { NFS4ERR_LOCKED,       -EAGAIN         },
5051         { NFS4ERR_RESOURCE,     -EREMOTEIO      },
5052         { NFS4ERR_SYMLINK,      -ELOOP          },
5053         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
5054         { NFS4ERR_DEADLOCK,     -EDEADLK        },
5055         { NFS4ERR_WRONGSEC,     -EPERM          }, /* FIXME: this needs
5056                                                     * to be handled by a
5057                                                     * middle-layer.
5058                                                     */
5059         { -1,                   -EIO            }
5060 };
5061
5062 /*
5063  * Convert an NFS error code to a local one.
5064  * This one is used jointly by NFSv2 and NFSv3.
5065  */
5066 static int
5067 nfs4_stat_to_errno(int stat)
5068 {
5069         int i;
5070         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
5071                 if (nfs_errtbl[i].stat == stat)
5072                         return nfs_errtbl[i].errno;
5073         }
5074         if (stat <= 10000 || stat > 10100) {
5075                 /* The server is looney tunes. */
5076                 return -ESERVERFAULT;
5077         }
5078         /* If we cannot translate the error, the recovery routines should
5079          * handle it.
5080          * Note: remaining NFSv4 error codes have values > 10000, so should
5081          * not conflict with native Linux error codes.
5082          */
5083         return -stat;
5084 }
5085
5086 #define PROC(proc, argtype, restype)                            \
5087 [NFSPROC4_CLNT_##proc] = {                                      \
5088         .p_proc   = NFSPROC4_COMPOUND,                          \
5089         .p_encode = (kxdrproc_t) nfs4_xdr_##argtype,            \
5090         .p_decode = (kxdrproc_t) nfs4_xdr_##restype,            \
5091         .p_arglen = NFS4_##argtype##_sz,                        \
5092         .p_replen = NFS4_##restype##_sz,                        \
5093         .p_statidx = NFSPROC4_CLNT_##proc,                      \
5094         .p_name   = #proc,                                      \
5095 }
5096
5097 struct rpc_procinfo     nfs4_procedures[] = {
5098   PROC(READ,            enc_read,       dec_read),
5099   PROC(WRITE,           enc_write,      dec_write),
5100   PROC(COMMIT,          enc_commit,     dec_commit),
5101   PROC(OPEN,            enc_open,       dec_open),
5102   PROC(OPEN_CONFIRM,    enc_open_confirm,       dec_open_confirm),
5103   PROC(OPEN_NOATTR,     enc_open_noattr,        dec_open_noattr),
5104   PROC(OPEN_DOWNGRADE,  enc_open_downgrade,     dec_open_downgrade),
5105   PROC(CLOSE,           enc_close,      dec_close),
5106   PROC(SETATTR,         enc_setattr,    dec_setattr),
5107   PROC(FSINFO,          enc_fsinfo,     dec_fsinfo),
5108   PROC(RENEW,           enc_renew,      dec_renew),
5109   PROC(SETCLIENTID,     enc_setclientid,        dec_setclientid),
5110   PROC(SETCLIENTID_CONFIRM,     enc_setclientid_confirm,        dec_setclientid_confirm),
5111   PROC(LOCK,            enc_lock,       dec_lock),
5112   PROC(LOCKT,           enc_lockt,      dec_lockt),
5113   PROC(LOCKU,           enc_locku,      dec_locku),
5114   PROC(ACCESS,          enc_access,     dec_access),
5115   PROC(GETATTR,         enc_getattr,    dec_getattr),
5116   PROC(LOOKUP,          enc_lookup,     dec_lookup),
5117   PROC(LOOKUP_ROOT,     enc_lookup_root,        dec_lookup_root),
5118   PROC(REMOVE,          enc_remove,     dec_remove),
5119   PROC(RENAME,          enc_rename,     dec_rename),
5120   PROC(LINK,            enc_link,       dec_link),
5121   PROC(SYMLINK,         enc_symlink,    dec_symlink),
5122   PROC(CREATE,          enc_create,     dec_create),
5123   PROC(PATHCONF,        enc_pathconf,   dec_pathconf),
5124   PROC(STATFS,          enc_statfs,     dec_statfs),
5125   PROC(READLINK,        enc_readlink,   dec_readlink),
5126   PROC(READDIR,         enc_readdir,    dec_readdir),
5127   PROC(SERVER_CAPS,     enc_server_caps, dec_server_caps),
5128   PROC(DELEGRETURN,     enc_delegreturn, dec_delegreturn),
5129   PROC(GETACL,          enc_getacl,     dec_getacl),
5130   PROC(SETACL,          enc_setacl,     dec_setacl),
5131   PROC(FS_LOCATIONS,    enc_fs_locations, dec_fs_locations),
5132 #if defined(CONFIG_NFS_V4_1)
5133   PROC(EXCHANGE_ID,     enc_exchange_id,        dec_exchange_id),
5134   PROC(GET_LEASE_TIME,  enc_get_lease_time,     dec_get_lease_time),
5135 #endif /* CONFIG_NFS_V4_1 */
5136 };
5137
5138 struct rpc_version              nfs_version4 = {
5139         .number                 = 4,
5140         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
5141         .procs                  = nfs4_procedures
5142 };
5143
5144 /*
5145  * Local variables:
5146  *  c-basic-offset: 8
5147  * End:
5148  */