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 encode_rename_maxsz     (op_encode_hdr_maxsz + \
 196                                 2 * nfs4_name_maxsz)
 197 #define decode_rename_maxsz     (op_decode_hdr_maxsz + 5 + 5)
 198 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 199                                 nfs4_name_maxsz)
 200 #define decode_link_maxsz       (op_decode_hdr_maxsz + 5)
 201 #define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 202                                  7 + \
 203                                  1 + encode_stateid_maxsz + 8)
 204 #define decode_lock_denied_maxsz \
 205                                 (8 + decode_lockowner_maxsz)
 206 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 207                                  decode_lock_denied_maxsz)
 208 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 12)
 209 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 210                                  decode_lock_denied_maxsz)
 211 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 212                                  encode_stateid_maxsz + \
 213                                  4)
 214 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 215                                  decode_stateid_maxsz)
 216 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 217 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 218 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 219                                 1 + nfs4_name_maxsz + \
 220                                 1 + \
 221                                 nfs4_fattr_maxsz)
 222 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 223 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 224                                 1 + 2 + nfs4_name_maxsz + \
 225                                 encode_attrs_maxsz)
 226 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
 227                                 decode_change_info_maxsz + \
 228                                 nfs4_fattr_bitmap_maxsz)
 229 #define encode_statfs_maxsz     (encode_getattr_maxsz)
 230 #define decode_statfs_maxsz     (decode_getattr_maxsz)
 231 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 232 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 233 #define encode_getacl_maxsz     (encode_getattr_maxsz)
 234 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 235                                  nfs4_fattr_bitmap_maxsz + 1)
 236 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 237                                  encode_stateid_maxsz + 3)
 238 #define decode_setacl_maxsz     (decode_setattr_maxsz)
 239 #define encode_fs_locations_maxsz \
 240                                 (encode_getattr_maxsz)
 241 #define decode_fs_locations_maxsz \
 242                                 (0)
 243 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 244 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 245 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 246                                 encode_putfh_maxsz + \
 247                                 encode_read_maxsz)
 248 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 249                                 decode_putfh_maxsz + \
 250                                 decode_read_maxsz)
 251 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 252                                 encode_putfh_maxsz + \
 253                                 encode_readlink_maxsz)
 254 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 255                                 decode_putfh_maxsz + \
 256                                 decode_readlink_maxsz)
 257 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 258                                 encode_putfh_maxsz + \
 259                                 encode_readdir_maxsz)
 260 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 261                                 decode_putfh_maxsz + \
 262                                 decode_readdir_maxsz)
 263 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 264                                 encode_putfh_maxsz + \
 265                                 encode_write_maxsz + \
 266                                 encode_getattr_maxsz)
 267 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 268                                 decode_putfh_maxsz + \
 269                                 decode_write_maxsz + \
 270                                 decode_getattr_maxsz)
 271 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 272                                 encode_putfh_maxsz + \
 273                                 encode_commit_maxsz + \
 274                                 encode_getattr_maxsz)
 275 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 276                                 decode_putfh_maxsz + \
 277                                 decode_commit_maxsz + \
 278                                 decode_getattr_maxsz)
 279 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 280                                 encode_putfh_maxsz + \
 281                                 encode_savefh_maxsz + \
 282                                 encode_open_maxsz + \
 283                                 encode_getfh_maxsz + \
 284                                 encode_getattr_maxsz + \
 285                                 encode_restorefh_maxsz + \
 286                                 encode_getattr_maxsz)
 287 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 288                                 decode_putfh_maxsz + \
 289                                 decode_savefh_maxsz + \
 290                                 decode_open_maxsz + \
 291                                 decode_getfh_maxsz + \
 292                                 decode_getattr_maxsz + \
 293                                 decode_restorefh_maxsz + \
 294                                 decode_getattr_maxsz)
 295 #define NFS4_enc_open_confirm_sz \
 296                                 (compound_encode_hdr_maxsz + \
 297                                  encode_putfh_maxsz + \
 298                                  encode_open_confirm_maxsz)
 299 #define NFS4_dec_open_confirm_sz \
 300                                 (compound_decode_hdr_maxsz + \
 301                                  decode_putfh_maxsz + \
 302                                  decode_open_confirm_maxsz)
 303 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 304                                         encode_putfh_maxsz + \
 305                                         encode_open_maxsz + \
 306                                         encode_getattr_maxsz)
 307 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 308                                         decode_putfh_maxsz + \
 309                                         decode_open_maxsz + \
 310                                         decode_getattr_maxsz)
 311 #define NFS4_enc_open_downgrade_sz \
 312                                 (compound_encode_hdr_maxsz + \
 313                                  encode_putfh_maxsz + \
 314                                  encode_open_downgrade_maxsz + \
 315                                  encode_getattr_maxsz)
 316 #define NFS4_dec_open_downgrade_sz \
 317                                 (compound_decode_hdr_maxsz + \
 318                                  decode_putfh_maxsz + \
 319                                  decode_open_downgrade_maxsz + \
 320                                  decode_getattr_maxsz)
 321 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 322                                  encode_putfh_maxsz + \
 323                                  encode_close_maxsz + \
 324                                  encode_getattr_maxsz)
 325 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 326                                  decode_putfh_maxsz + \
 327                                  decode_close_maxsz + \
 328                                  decode_getattr_maxsz)
 329 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 330                                  encode_putfh_maxsz + \
 331                                  encode_setattr_maxsz + \
 332                                  encode_getattr_maxsz)
 333 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 334                                  decode_putfh_maxsz + \
 335                                  decode_setattr_maxsz + \
 336                                  decode_getattr_maxsz)
 337 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 338                                 encode_putfh_maxsz + \
 339                                 encode_fsinfo_maxsz)
 340 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 341                                 decode_putfh_maxsz + \
 342                                 decode_fsinfo_maxsz)
 343 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 344                                 encode_renew_maxsz)
 345 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 346                                 decode_renew_maxsz)
 347 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 348                                 encode_setclientid_maxsz)
 349 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 350                                 decode_setclientid_maxsz)
 351 #define NFS4_enc_setclientid_confirm_sz \
 352                                 (compound_encode_hdr_maxsz + \
 353                                 encode_setclientid_confirm_maxsz + \
 354                                 encode_putrootfh_maxsz + \
 355                                 encode_fsinfo_maxsz)
 356 #define NFS4_dec_setclientid_confirm_sz \
 357                                 (compound_decode_hdr_maxsz + \
 358                                 decode_setclientid_confirm_maxsz + \
 359                                 decode_putrootfh_maxsz + \
 360                                 decode_fsinfo_maxsz)
 361 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 362                                 encode_putfh_maxsz + \
 363                                 encode_lock_maxsz)
 364 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 365                                 decode_putfh_maxsz + \
 366                                 decode_lock_maxsz)
 367 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 368                                 encode_putfh_maxsz + \
 369                                 encode_lockt_maxsz)
 370 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 371                                  decode_putfh_maxsz + \
 372                                  decode_lockt_maxsz)
 373 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 374                                 encode_putfh_maxsz + \
 375                                 encode_locku_maxsz)
 376 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 377                                 decode_putfh_maxsz + \
 378                                 decode_locku_maxsz)
 379 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 380                                 encode_putfh_maxsz + \
 381                                 encode_access_maxsz + \
 382                                 encode_getattr_maxsz)
 383 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 384                                 decode_putfh_maxsz + \
 385                                 decode_access_maxsz + \
 386                                 decode_getattr_maxsz)
 387 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 388                                 encode_putfh_maxsz + \
 389                                 encode_getattr_maxsz)
 390 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 391                                 decode_putfh_maxsz + \
 392                                 decode_getattr_maxsz)
 393 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 394                                 encode_putfh_maxsz + \
 395                                 encode_lookup_maxsz + \
 396                                 encode_getattr_maxsz + \
 397                                 encode_getfh_maxsz)
 398 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 399                                 decode_putfh_maxsz + \
 400                                 decode_lookup_maxsz + \
 401                                 decode_getattr_maxsz + \
 402                                 decode_getfh_maxsz)
 403 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 404                                 encode_putrootfh_maxsz + \
 405                                 encode_getattr_maxsz + \
 406                                 encode_getfh_maxsz)
 407 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 408                                 decode_putrootfh_maxsz + \
 409                                 decode_getattr_maxsz + \
 410                                 decode_getfh_maxsz)
 411 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 412                                 encode_putfh_maxsz + \
 413                                 encode_remove_maxsz + \
 414                                 encode_getattr_maxsz)
 415 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 416                                 decode_putfh_maxsz + \
 417                                 op_decode_hdr_maxsz + 5 + \
 418                                 decode_getattr_maxsz)
 419 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 420                                 encode_putfh_maxsz + \
 421                                 encode_savefh_maxsz + \
 422                                 encode_putfh_maxsz + \
 423                                 encode_rename_maxsz + \
 424                                 encode_getattr_maxsz + \
 425                                 encode_restorefh_maxsz + \
 426                                 encode_getattr_maxsz)
 427 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 428                                 decode_putfh_maxsz + \
 429                                 decode_savefh_maxsz + \
 430                                 decode_putfh_maxsz + \
 431                                 decode_rename_maxsz + \
 432                                 decode_getattr_maxsz + \
 433                                 decode_restorefh_maxsz + \
 434                                 decode_getattr_maxsz)
 435 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 436                                 encode_putfh_maxsz + \
 437                                 encode_savefh_maxsz + \
 438                                 encode_putfh_maxsz + \
 439                                 encode_link_maxsz + \
 440                                 decode_getattr_maxsz + \
 441                                 encode_restorefh_maxsz + \
 442                                 decode_getattr_maxsz)
 443 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 444                                 decode_putfh_maxsz + \
 445                                 decode_savefh_maxsz + \
 446                                 decode_putfh_maxsz + \
 447                                 decode_link_maxsz + \
 448                                 decode_getattr_maxsz + \
 449                                 decode_restorefh_maxsz + \
 450                                 decode_getattr_maxsz)
 451 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 452                                 encode_putfh_maxsz + \
 453                                 encode_symlink_maxsz + \
 454                                 encode_getattr_maxsz + \
 455                                 encode_getfh_maxsz)
 456 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 457                                 decode_putfh_maxsz + \
 458                                 decode_symlink_maxsz + \
 459                                 decode_getattr_maxsz + \
 460                                 decode_getfh_maxsz)
 461 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 462                                 encode_putfh_maxsz + \
 463                                 encode_savefh_maxsz + \
 464                                 encode_create_maxsz + \
 465                                 encode_getfh_maxsz + \
 466                                 encode_getattr_maxsz + \
 467                                 encode_restorefh_maxsz + \
 468                                 encode_getattr_maxsz)
 469 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 470                                 decode_putfh_maxsz + \
 471                                 decode_savefh_maxsz + \
 472                                 decode_create_maxsz + \
 473                                 decode_getfh_maxsz + \
 474                                 decode_getattr_maxsz + \
 475                                 decode_restorefh_maxsz + \
 476                                 decode_getattr_maxsz)
 477 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 478                                 encode_putfh_maxsz + \
 479                                 encode_getattr_maxsz)
 480 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 481                                 decode_putfh_maxsz + \
 482                                 decode_getattr_maxsz)
 483 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 484                                 encode_putfh_maxsz + \
 485                                 encode_statfs_maxsz)
 486 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 487                                 decode_putfh_maxsz + \
 488                                 decode_statfs_maxsz)
 489 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 490                                 encode_putfh_maxsz + \
 491                                 encode_getattr_maxsz)
 492 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 493                                 decode_putfh_maxsz + \
 494                                 decode_getattr_maxsz)
 495 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 496                                 encode_putfh_maxsz + \
 497                                 encode_delegreturn_maxsz + \
 498                                 encode_getattr_maxsz)
 499 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 500                                 decode_delegreturn_maxsz + \
 501                                 decode_getattr_maxsz)
 502 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 503                                 encode_putfh_maxsz + \
 504                                 encode_getacl_maxsz)
 505 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 506                                 decode_putfh_maxsz + \
 507                                 decode_getacl_maxsz)
 508 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 509                                 encode_putfh_maxsz + \
 510                                 encode_setacl_maxsz)
 511 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 512                                 decode_putfh_maxsz + \
 513                                 decode_setacl_maxsz)
 514 #define NFS4_enc_fs_locations_sz \
 515                                 (compound_encode_hdr_maxsz + \
 516                                  encode_putfh_maxsz + \
 517                                  encode_lookup_maxsz + \
 518                                  encode_fs_locations_maxsz)
 519 #define NFS4_dec_fs_locations_sz \
 520                                 (compound_decode_hdr_maxsz + \
 521                                  decode_putfh_maxsz + \
 522                                  decode_lookup_maxsz + \
 523                                  decode_fs_locations_maxsz)
 524
 525 static const umode_t nfs_type2fmt[] = {
 526         [NF4BAD] = 0,
 527         [NF4REG] = S_IFREG,
 528         [NF4DIR] = S_IFDIR,
 529         [NF4BLK] = S_IFBLK,
 530         [NF4CHR] = S_IFCHR,
 531         [NF4LNK] = S_IFLNK,
 532         [NF4SOCK] = S_IFSOCK,
 533         [NF4FIFO] = S_IFIFO,
 534         [NF4ATTRDIR] = 0,
 535         [NF4NAMEDATTR] = 0,
 536 };
 537
 538 struct compound_hdr {
 539         int32_t         status;
 540         uint32_t        nops;
 541         __be32 *        nops_p;
 542         uint32_t        taglen;
 543         char *          tag;
 544 };
 545
 546 /*
 547  * START OF "GENERIC" ENCODE ROUTINES.
 548  *   These may look a little ugly since they are imported from a "generic"
 549  * set of XDR encode/decode routines which are intended to be shared by
 550  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
 551  *
 552  * If the pain of reading these is too great, it should be a straightforward
 553  * task to translate them into Linux-specific versions which are more
 554  * consistent with the style used in NFSv2/v3...
 555  */
 556 #define WRITE32(n)               *p++ = htonl(n)
 557 #define WRITE64(n)               do {                           \
 558         *p++ = htonl((uint32_t)((n) >> 32));                            \
 559         *p++ = htonl((uint32_t)(n));                                    \
 560 } while (0)
 561 #define WRITEMEM(ptr,nbytes)     do {                           \
 562         p = xdr_encode_opaque_fixed(p, ptr, nbytes);            \
 563 } while (0)
 564
 565 #define RESERVE_SPACE(nbytes)   do {                            \
 566         p = xdr_reserve_space(xdr, nbytes);                     \
 567         BUG_ON(!p);                                             \
 568 } while (0)
 569
 570 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 571 {
 572         __be32 *p;
 573
 574         p = xdr_reserve_space(xdr, 4 + len);
 575         BUG_ON(p == NULL);
 576         xdr_encode_opaque(p, str, len);
 577 }
 578
 579 static void encode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
 580 {
 581         __be32 *p;
 582
 583         dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
 584         BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
 585         RESERVE_SPACE(12+(XDR_QUADLEN(hdr->taglen)<<2));
 586         WRITE32(hdr->taglen);
 587         WRITEMEM(hdr->tag, hdr->taglen);
 588         WRITE32(NFS4_MINOR_VERSION);
 589         hdr->nops_p = p;
 590         WRITE32(hdr->nops);
 591 }
 592
 593 static void encode_nops(struct compound_hdr *hdr)
 594 {
 595         *hdr->nops_p = htonl(hdr->nops);
 596 }
 597
 598 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 599 {
 600         __be32 *p;
 601
 602         p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
 603         BUG_ON(p == NULL);
 604         xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
 605 }
 606
 607 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
 608 {
 609         char owner_name[IDMAP_NAMESZ];
 610         char owner_group[IDMAP_NAMESZ];
 611         int owner_namelen = 0;
 612         int owner_grouplen = 0;
 613         __be32 *p;
 614         __be32 *q;
 615         int len;
 616         uint32_t bmval0 = 0;
 617         uint32_t bmval1 = 0;
 618
 619         /*
 620          * We reserve enough space to write the entire attribute buffer at once.
 621          * In the worst-case, this would be
 622          *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
 623          *          = 36 bytes, plus any contribution from variable-length fields
 624          *            such as owner/group.
 625          */
 626         len = 16;
 627
 628         /* Sigh */
 629         if (iap->ia_valid & ATTR_SIZE)
 630                 len += 8;
 631         if (iap->ia_valid & ATTR_MODE)
 632                 len += 4;
 633         if (iap->ia_valid & ATTR_UID) {
 634                 owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name);
 635                 if (owner_namelen < 0) {
 636                         dprintk("nfs: couldn't resolve uid %d to string\n",
 637                                         iap->ia_uid);
 638                         /* XXX */
 639                         strcpy(owner_name, "nobody");
 640                         owner_namelen = sizeof("nobody") - 1;
 641                         /* goto out; */
 642                 }
 643                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
 644         }
 645         if (iap->ia_valid & ATTR_GID) {
 646                 owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group);
 647                 if (owner_grouplen < 0) {
 648                         dprintk("nfs: couldn't resolve gid %d to string\n",
 649                                         iap->ia_gid);
 650                         strcpy(owner_group, "nobody");
 651                         owner_grouplen = sizeof("nobody") - 1;
 652                         /* goto out; */
 653                 }
 654                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
 655         }
 656         if (iap->ia_valid & ATTR_ATIME_SET)
 657                 len += 16;
 658         else if (iap->ia_valid & ATTR_ATIME)
 659                 len += 4;
 660         if (iap->ia_valid & ATTR_MTIME_SET)
 661                 len += 16;
 662         else if (iap->ia_valid & ATTR_MTIME)
 663                 len += 4;
 664         RESERVE_SPACE(len);
 665
 666         /*
 667          * We write the bitmap length now, but leave the bitmap and the attribute
 668          * buffer length to be backfilled at the end of this routine.
 669          */
 670         WRITE32(2);
 671         q = p;
 672         p += 3;
 673
 674         if (iap->ia_valid & ATTR_SIZE) {
 675                 bmval0 |= FATTR4_WORD0_SIZE;
 676                 WRITE64(iap->ia_size);
 677         }
 678         if (iap->ia_valid & ATTR_MODE) {
 679                 bmval1 |= FATTR4_WORD1_MODE;
 680                 WRITE32(iap->ia_mode & S_IALLUGO);
 681         }
 682         if (iap->ia_valid & ATTR_UID) {
 683                 bmval1 |= FATTR4_WORD1_OWNER;
 684                 WRITE32(owner_namelen);
 685                 WRITEMEM(owner_name, owner_namelen);
 686         }
 687         if (iap->ia_valid & ATTR_GID) {
 688                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
 689                 WRITE32(owner_grouplen);
 690                 WRITEMEM(owner_group, owner_grouplen);
 691         }
 692         if (iap->ia_valid & ATTR_ATIME_SET) {
 693                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 694                 WRITE32(NFS4_SET_TO_CLIENT_TIME);
 695                 WRITE32(0);
 696                 WRITE32(iap->ia_mtime.tv_sec);
 697                 WRITE32(iap->ia_mtime.tv_nsec);
 698         }
 699         else if (iap->ia_valid & ATTR_ATIME) {
 700                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 701                 WRITE32(NFS4_SET_TO_SERVER_TIME);
 702         }
 703         if (iap->ia_valid & ATTR_MTIME_SET) {
 704                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 705                 WRITE32(NFS4_SET_TO_CLIENT_TIME);
 706                 WRITE32(0);
 707                 WRITE32(iap->ia_mtime.tv_sec);
 708                 WRITE32(iap->ia_mtime.tv_nsec);
 709         }
 710         else if (iap->ia_valid & ATTR_MTIME) {
 711                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 712                 WRITE32(NFS4_SET_TO_SERVER_TIME);
 713         }
 714
 715         /*
 716          * Now we backfill the bitmap and the attribute buffer length.
 717          */
 718         if (len != ((char *)p - (char *)q) + 4) {
 719                 printk(KERN_ERR "nfs: Attr length error, %u != %Zu\n",
 720                                 len, ((char *)p - (char *)q) + 4);
 721                 BUG();
 722         }
 723         len = (char *)p - (char *)q - 12;
 724         *q++ = htonl(bmval0);
 725         *q++ = htonl(bmval1);
 726         *q++ = htonl(len);
 727
 728 /* out: */
 729 }
 730
 731 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
 732 {
 733         __be32 *p;
 734
 735         RESERVE_SPACE(8);
 736         WRITE32(OP_ACCESS);
 737         WRITE32(access);
 738         hdr->nops++;
 739 }
 740
 741 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
 742 {
 743         __be32 *p;
 744
 745         RESERVE_SPACE(8+NFS4_STATEID_SIZE);
 746         WRITE32(OP_CLOSE);
 747         WRITE32(arg->seqid->sequence->counter);
 748         WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
 749         hdr->nops++;
 750 }
 751
 752 static void encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
 753 {
 754         __be32 *p;
 755
 756         RESERVE_SPACE(16);
 757         WRITE32(OP_COMMIT);
 758         WRITE64(args->offset);
 759         WRITE32(args->count);
 760         hdr->nops++;
 761 }
 762
 763 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
 764 {
 765         __be32 *p;
 766
 767         RESERVE_SPACE(8);
 768         WRITE32(OP_CREATE);
 769         WRITE32(create->ftype);
 770
 771         switch (create->ftype) {
 772         case NF4LNK:
 773                 RESERVE_SPACE(4);
 774                 WRITE32(create->u.symlink.len);
 775                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
 776                 break;
 777
 778         case NF4BLK: case NF4CHR:
 779                 RESERVE_SPACE(8);
 780                 WRITE32(create->u.device.specdata1);
 781                 WRITE32(create->u.device.specdata2);
 782                 break;
 783
 784         default:
 785                 break;
 786         }
 787
 788         RESERVE_SPACE(4 + create->name->len);
 789         WRITE32(create->name->len);
 790         WRITEMEM(create->name->name, create->name->len);
 791         hdr->nops++;
 792
 793         encode_attrs(xdr, create->attrs, create->server);
 794 }
 795
 796 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
 797 {
 798         __be32 *p;
 799
 800         RESERVE_SPACE(12);
 801         WRITE32(OP_GETATTR);
 802         WRITE32(1);
 803         WRITE32(bitmap);
 804         hdr->nops++;
 805 }
 806
 807 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
 808 {
 809         __be32 *p;
 810
 811         RESERVE_SPACE(16);
 812         WRITE32(OP_GETATTR);
 813         WRITE32(2);
 814         WRITE32(bm0);
 815         WRITE32(bm1);
 816         hdr->nops++;
 817 }
 818
 819 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
 820 {
 821         encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
 822                            bitmask[1] & nfs4_fattr_bitmap[1], hdr);
 823 }
 824
 825 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
 826 {
 827         encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
 828                            bitmask[1] & nfs4_fsinfo_bitmap[1], hdr);
 829 }
 830
 831 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
 832 {
 833         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
 834                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
 835 }
 836
 837 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
 838 {
 839         __be32 *p;
 840
 841         RESERVE_SPACE(4);
 842         WRITE32(OP_GETFH);
 843         hdr->nops++;
 844 }
 845
 846 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
 847 {
 848         __be32 *p;
 849
 850         RESERVE_SPACE(8 + name->len);
 851         WRITE32(OP_LINK);
 852         WRITE32(name->len);
 853         WRITEMEM(name->name, name->len);
 854         hdr->nops++;
 855 }
 856
 857 static inline int nfs4_lock_type(struct file_lock *fl, int block)
 858 {
 859         if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
 860                 return block ? NFS4_READW_LT : NFS4_READ_LT;
 861         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
 862 }
 863
 864 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
 865 {
 866         if (fl->fl_end == OFFSET_MAX)
 867                 return ~(uint64_t)0;
 868         return fl->fl_end - fl->fl_start + 1;
 869 }
 870
 871 /*
 872  * opcode,type,reclaim,offset,length,new_lock_owner = 32
 873  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
 874  */
 875 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
 876 {
 877         __be32 *p;
 878
 879         RESERVE_SPACE(32);
 880         WRITE32(OP_LOCK);
 881         WRITE32(nfs4_lock_type(args->fl, args->block));
 882         WRITE32(args->reclaim);
 883         WRITE64(args->fl->fl_start);
 884         WRITE64(nfs4_lock_length(args->fl));
 885         WRITE32(args->new_lock_owner);
 886         if (args->new_lock_owner){
 887                 RESERVE_SPACE(4+NFS4_STATEID_SIZE+32);
 888                 WRITE32(args->open_seqid->sequence->counter);
 889                 WRITEMEM(args->open_stateid->data, NFS4_STATEID_SIZE);
 890                 WRITE32(args->lock_seqid->sequence->counter);
 891                 WRITE64(args->lock_owner.clientid);
 892                 WRITE32(16);
 893                 WRITEMEM("lock id:", 8);
 894                 WRITE64(args->lock_owner.id);
 895         }
 896         else {
 897                 RESERVE_SPACE(NFS4_STATEID_SIZE+4);
 898                 WRITEMEM(args->lock_stateid->data, NFS4_STATEID_SIZE);
 899                 WRITE32(args->lock_seqid->sequence->counter);
 900         }
 901         hdr->nops++;
 902 }
 903
 904 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
 905 {
 906         __be32 *p;
 907
 908         RESERVE_SPACE(52);
 909         WRITE32(OP_LOCKT);
 910         WRITE32(nfs4_lock_type(args->fl, 0));
 911         WRITE64(args->fl->fl_start);
 912         WRITE64(nfs4_lock_length(args->fl));
 913         WRITE64(args->lock_owner.clientid);
 914         WRITE32(16);
 915         WRITEMEM("lock id:", 8);
 916         WRITE64(args->lock_owner.id);
 917         hdr->nops++;
 918 }
 919
 920 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
 921 {
 922         __be32 *p;
 923
 924         RESERVE_SPACE(12+NFS4_STATEID_SIZE+16);
 925         WRITE32(OP_LOCKU);
 926         WRITE32(nfs4_lock_type(args->fl, 0));
 927         WRITE32(args->seqid->sequence->counter);
 928         WRITEMEM(args->stateid->data, NFS4_STATEID_SIZE);
 929         WRITE64(args->fl->fl_start);
 930         WRITE64(nfs4_lock_length(args->fl));
 931         hdr->nops++;
 932 }
 933
 934 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
 935 {
 936         int len = name->len;
 937         __be32 *p;
 938
 939         RESERVE_SPACE(8 + len);
 940         WRITE32(OP_LOOKUP);
 941         WRITE32(len);
 942         WRITEMEM(name->name, len);
 943         hdr->nops++;
 944 }
 945
 946 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
 947 {
 948         __be32 *p;
 949
 950         RESERVE_SPACE(8);
 951         switch (fmode & (FMODE_READ|FMODE_WRITE)) {
 952         case FMODE_READ:
 953                 WRITE32(NFS4_SHARE_ACCESS_READ);
 954                 break;
 955         case FMODE_WRITE:
 956                 WRITE32(NFS4_SHARE_ACCESS_WRITE);
 957                 break;
 958         case FMODE_READ|FMODE_WRITE:
 959                 WRITE32(NFS4_SHARE_ACCESS_BOTH);
 960                 break;
 961         default:
 962                 WRITE32(0);
 963         }
 964         WRITE32(0);             /* for linux, share_deny = 0 always */
 965 }
 966
 967 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
 968 {
 969         __be32 *p;
 970  /*
 971  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
 972  * owner 4 = 32
 973  */
 974         RESERVE_SPACE(8);
 975         WRITE32(OP_OPEN);
 976         WRITE32(arg->seqid->sequence->counter);
 977         encode_share_access(xdr, arg->fmode);
 978         RESERVE_SPACE(28);
 979         WRITE64(arg->clientid);
 980         WRITE32(16);
 981         WRITEMEM("open id:", 8);
 982         WRITE64(arg->id);
 983 }
 984
 985 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
 986 {
 987         __be32 *p;
 988
 989         RESERVE_SPACE(4);
 990         switch(arg->open_flags & O_EXCL) {
 991         case 0:
 992                 WRITE32(NFS4_CREATE_UNCHECKED);
 993                 encode_attrs(xdr, arg->u.attrs, arg->server);
 994                 break;
 995         default:
 996                 WRITE32(NFS4_CREATE_EXCLUSIVE);
 997                 encode_nfs4_verifier(xdr, &arg->u.verifier);
 998         }
 999 }
1000
1001 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1002 {
1003         __be32 *p;
1004
1005         RESERVE_SPACE(4);
1006         switch (arg->open_flags & O_CREAT) {
1007         case 0:
1008                 WRITE32(NFS4_OPEN_NOCREATE);
1009                 break;
1010         default:
1011                 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1012                 WRITE32(NFS4_OPEN_CREATE);
1013                 encode_createmode(xdr, arg);
1014         }
1015 }
1016
1017 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1018 {
1019         __be32 *p;
1020
1021         RESERVE_SPACE(4);
1022         switch (delegation_type) {
1023         case 0:
1024                 WRITE32(NFS4_OPEN_DELEGATE_NONE);
1025                 break;
1026         case FMODE_READ:
1027                 WRITE32(NFS4_OPEN_DELEGATE_READ);
1028                 break;
1029         case FMODE_WRITE|FMODE_READ:
1030                 WRITE32(NFS4_OPEN_DELEGATE_WRITE);
1031                 break;
1032         default:
1033                 BUG();
1034         }
1035 }
1036
1037 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1038 {
1039         __be32 *p;
1040
1041         RESERVE_SPACE(4);
1042         WRITE32(NFS4_OPEN_CLAIM_NULL);
1043         encode_string(xdr, name->len, name->name);
1044 }
1045
1046 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1047 {
1048         __be32 *p;
1049
1050         RESERVE_SPACE(4);
1051         WRITE32(NFS4_OPEN_CLAIM_PREVIOUS);
1052         encode_delegation_type(xdr, type);
1053 }
1054
1055 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1056 {
1057         __be32 *p;
1058
1059         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1060         WRITE32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1061         WRITEMEM(stateid->data, NFS4_STATEID_SIZE);
1062         encode_string(xdr, name->len, name->name);
1063 }
1064
1065 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1066 {
1067         encode_openhdr(xdr, arg);
1068         encode_opentype(xdr, arg);
1069         switch (arg->claim) {
1070         case NFS4_OPEN_CLAIM_NULL:
1071                 encode_claim_null(xdr, arg->name);
1072                 break;
1073         case NFS4_OPEN_CLAIM_PREVIOUS:
1074                 encode_claim_previous(xdr, arg->u.delegation_type);
1075                 break;
1076         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1077                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1078                 break;
1079         default:
1080                 BUG();
1081         }
1082         hdr->nops++;
1083 }
1084
1085 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1086 {
1087         __be32 *p;
1088
1089         RESERVE_SPACE(4+NFS4_STATEID_SIZE+4);
1090         WRITE32(OP_OPEN_CONFIRM);
1091         WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
1092         WRITE32(arg->seqid->sequence->counter);
1093         hdr->nops++;
1094 }
1095
1096 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1097 {
1098         __be32 *p;
1099
1100         RESERVE_SPACE(4+NFS4_STATEID_SIZE+4);
1101         WRITE32(OP_OPEN_DOWNGRADE);
1102         WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
1103         WRITE32(arg->seqid->sequence->counter);
1104         encode_share_access(xdr, arg->fmode);
1105         hdr->nops++;
1106 }
1107
1108 static void
1109 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1110 {
1111         int len = fh->size;
1112         __be32 *p;
1113
1114         RESERVE_SPACE(8 + len);
1115         WRITE32(OP_PUTFH);
1116         WRITE32(len);
1117         WRITEMEM(fh->data, len);
1118         hdr->nops++;
1119 }
1120
1121 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1122 {
1123         __be32 *p;
1124
1125         RESERVE_SPACE(4);
1126         WRITE32(OP_PUTROOTFH);
1127         hdr->nops++;
1128 }
1129
1130 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx)
1131 {
1132         nfs4_stateid stateid;
1133         __be32 *p;
1134
1135         RESERVE_SPACE(NFS4_STATEID_SIZE);
1136         if (ctx->state != NULL) {
1137                 nfs4_copy_stateid(&stateid, ctx->state, ctx->lockowner);
1138                 WRITEMEM(stateid.data, NFS4_STATEID_SIZE);
1139         } else
1140                 WRITEMEM(zero_stateid.data, NFS4_STATEID_SIZE);
1141 }
1142
1143 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1144 {
1145         __be32 *p;
1146
1147         RESERVE_SPACE(4);
1148         WRITE32(OP_READ);
1149
1150         encode_stateid(xdr, args->context);
1151
1152         RESERVE_SPACE(12);
1153         WRITE64(args->offset);
1154         WRITE32(args->count);
1155         hdr->nops++;
1156 }
1157
1158 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1159 {
1160         uint32_t attrs[2] = {
1161                 FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID,
1162                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1163         };
1164         __be32 *p;
1165
1166         RESERVE_SPACE(12+NFS4_VERIFIER_SIZE+20);
1167         WRITE32(OP_READDIR);
1168         WRITE64(readdir->cookie);
1169         WRITEMEM(readdir->verifier.data, NFS4_VERIFIER_SIZE);
1170         WRITE32(readdir->count >> 1);  /* We're not doing readdirplus */
1171         WRITE32(readdir->count);
1172         WRITE32(2);
1173         /* Switch to mounted_on_fileid if the server supports it */
1174         if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
1175                 attrs[0] &= ~FATTR4_WORD0_FILEID;
1176         else
1177                 attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
1178         WRITE32(attrs[0] & readdir->bitmask[0]);
1179         WRITE32(attrs[1] & readdir->bitmask[1]);
1180         hdr->nops++;
1181         dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1182                         __func__,
1183                         (unsigned long long)readdir->cookie,
1184                         ((u32 *)readdir->verifier.data)[0],
1185                         ((u32 *)readdir->verifier.data)[1],
1186                         attrs[0] & readdir->bitmask[0],
1187                         attrs[1] & readdir->bitmask[1]);
1188 }
1189
1190 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1191 {
1192         __be32 *p;
1193
1194         RESERVE_SPACE(4);
1195         WRITE32(OP_READLINK);
1196         hdr->nops++;
1197 }
1198
1199 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1200 {
1201         __be32 *p;
1202
1203         RESERVE_SPACE(8 + name->len);
1204         WRITE32(OP_REMOVE);
1205         WRITE32(name->len);
1206         WRITEMEM(name->name, name->len);
1207         hdr->nops++;
1208 }
1209
1210 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1211 {
1212         __be32 *p;
1213
1214         RESERVE_SPACE(8 + oldname->len);
1215         WRITE32(OP_RENAME);
1216         WRITE32(oldname->len);
1217         WRITEMEM(oldname->name, oldname->len);
1218
1219         RESERVE_SPACE(4 + newname->len);
1220         WRITE32(newname->len);
1221         WRITEMEM(newname->name, newname->len);
1222         hdr->nops++;
1223 }
1224
1225 static void encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid, struct compound_hdr *hdr)
1226 {
1227         __be32 *p;
1228
1229         RESERVE_SPACE(12);
1230         WRITE32(OP_RENEW);
1231         WRITE64(client_stateid->cl_clientid);
1232         hdr->nops++;
1233 }
1234
1235 static void
1236 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1237 {
1238         __be32 *p;
1239
1240         RESERVE_SPACE(4);
1241         WRITE32(OP_RESTOREFH);
1242         hdr->nops++;
1243 }
1244
1245 static int
1246 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1247 {
1248         __be32 *p;
1249
1250         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1251         WRITE32(OP_SETATTR);
1252         WRITEMEM(zero_stateid.data, NFS4_STATEID_SIZE);
1253         RESERVE_SPACE(2*4);
1254         WRITE32(1);
1255         WRITE32(FATTR4_WORD0_ACL);
1256         if (arg->acl_len % 4)
1257                 return -EINVAL;
1258         RESERVE_SPACE(4);
1259         WRITE32(arg->acl_len);
1260         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1261         hdr->nops++;
1262         return 0;
1263 }
1264
1265 static void
1266 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1267 {
1268         __be32 *p;
1269
1270         RESERVE_SPACE(4);
1271         WRITE32(OP_SAVEFH);
1272         hdr->nops++;
1273 }
1274
1275 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1276 {
1277         __be32 *p;
1278
1279         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1280         WRITE32(OP_SETATTR);
1281         WRITEMEM(arg->stateid.data, NFS4_STATEID_SIZE);
1282         hdr->nops++;
1283         encode_attrs(xdr, arg->iap, server);
1284 }
1285
1286 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1287 {
1288         __be32 *p;
1289
1290         RESERVE_SPACE(4 + NFS4_VERIFIER_SIZE);
1291         WRITE32(OP_SETCLIENTID);
1292         WRITEMEM(setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
1293
1294         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1295         RESERVE_SPACE(4);
1296         WRITE32(setclientid->sc_prog);
1297         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1298         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1299         RESERVE_SPACE(4);
1300         WRITE32(setclientid->sc_cb_ident);
1301         hdr->nops++;
1302 }
1303
1304 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs_client *client_state, struct compound_hdr *hdr)
1305 {
1306         __be32 *p;
1307
1308         RESERVE_SPACE(12 + NFS4_VERIFIER_SIZE);
1309         WRITE32(OP_SETCLIENTID_CONFIRM);
1310         WRITE64(client_state->cl_clientid);
1311         WRITEMEM(client_state->cl_confirm.data, NFS4_VERIFIER_SIZE);
1312         hdr->nops++;
1313 }
1314
1315 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1316 {
1317         __be32 *p;
1318
1319         RESERVE_SPACE(4);
1320         WRITE32(OP_WRITE);
1321
1322         encode_stateid(xdr, args->context);
1323
1324         RESERVE_SPACE(16);
1325         WRITE64(args->offset);
1326         WRITE32(args->stable);
1327         WRITE32(args->count);
1328
1329         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1330         hdr->nops++;
1331 }
1332
1333 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1334 {
1335         __be32 *p;
1336
1337         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1338
1339         WRITE32(OP_DELEGRETURN);
1340         WRITEMEM(stateid->data, NFS4_STATEID_SIZE);
1341         hdr->nops++;
1342 }
1343 /*
1344  * END OF "GENERIC" ENCODE ROUTINES.
1345  */
1346
1347 /*
1348  * Encode an ACCESS request
1349  */
1350 static int nfs4_xdr_enc_access(struct rpc_rqst *req, __be32 *p, const struct nfs4_accessargs *args)
1351 {
1352         struct xdr_stream xdr;
1353         struct compound_hdr hdr = {
1354                 .nops = 0,
1355         };
1356
1357         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1358         encode_compound_hdr(&xdr, &hdr);
1359         encode_putfh(&xdr, args->fh, &hdr);
1360         encode_access(&xdr, args->access, &hdr);
1361         encode_getfattr(&xdr, args->bitmask, &hdr);
1362         encode_nops(&hdr);
1363         return 0;
1364 }
1365
1366 /*
1367  * Encode LOOKUP request
1368  */
1369 static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_arg *args)
1370 {
1371         struct xdr_stream xdr;
1372         struct compound_hdr hdr = {
1373                 .nops = 0,
1374         };
1375
1376         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1377         encode_compound_hdr(&xdr, &hdr);
1378         encode_putfh(&xdr, args->dir_fh, &hdr);
1379         encode_lookup(&xdr, args->name, &hdr);
1380         encode_getfh(&xdr, &hdr);
1381         encode_getfattr(&xdr, args->bitmask, &hdr);
1382         encode_nops(&hdr);
1383         return 0;
1384 }
1385
1386 /*
1387  * Encode LOOKUP_ROOT request
1388  */
1389 static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_root_arg *args)
1390 {
1391         struct xdr_stream xdr;
1392         struct compound_hdr hdr = {
1393                 .nops = 0,
1394         };
1395
1396         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1397         encode_compound_hdr(&xdr, &hdr);
1398         encode_putrootfh(&xdr, &hdr);
1399         encode_getfh(&xdr, &hdr);
1400         encode_getfattr(&xdr, args->bitmask, &hdr);
1401         encode_nops(&hdr);
1402         return 0;
1403 }
1404
1405 /*
1406  * Encode REMOVE request
1407  */
1408 static int nfs4_xdr_enc_remove(struct rpc_rqst *req, __be32 *p, const struct nfs_removeargs *args)
1409 {
1410         struct xdr_stream xdr;
1411         struct compound_hdr hdr = {
1412                 .nops = 0,
1413         };
1414
1415         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1416         encode_compound_hdr(&xdr, &hdr);
1417         encode_putfh(&xdr, args->fh, &hdr);
1418         encode_remove(&xdr, &args->name, &hdr);
1419         encode_getfattr(&xdr, args->bitmask, &hdr);
1420         encode_nops(&hdr);
1421         return 0;
1422 }
1423
1424 /*
1425  * Encode RENAME request
1426  */
1427 static int nfs4_xdr_enc_rename(struct rpc_rqst *req, __be32 *p, const struct nfs4_rename_arg *args)
1428 {
1429         struct xdr_stream xdr;
1430         struct compound_hdr hdr = {
1431                 .nops = 0,
1432         };
1433
1434         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1435         encode_compound_hdr(&xdr, &hdr);
1436         encode_putfh(&xdr, args->old_dir, &hdr);
1437         encode_savefh(&xdr, &hdr);
1438         encode_putfh(&xdr, args->new_dir, &hdr);
1439         encode_rename(&xdr, args->old_name, args->new_name, &hdr);
1440         encode_getfattr(&xdr, args->bitmask, &hdr);
1441         encode_restorefh(&xdr, &hdr);
1442         encode_getfattr(&xdr, args->bitmask, &hdr);
1443         encode_nops(&hdr);
1444         return 0;
1445 }
1446
1447 /*
1448  * Encode LINK request
1449  */
1450 static int nfs4_xdr_enc_link(struct rpc_rqst *req, __be32 *p, const struct nfs4_link_arg *args)
1451 {
1452         struct xdr_stream xdr;
1453         struct compound_hdr hdr = {
1454                 .nops = 0,
1455         };
1456
1457         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1458         encode_compound_hdr(&xdr, &hdr);
1459         encode_putfh(&xdr, args->fh, &hdr);
1460         encode_savefh(&xdr, &hdr);
1461         encode_putfh(&xdr, args->dir_fh, &hdr);
1462         encode_link(&xdr, args->name, &hdr);
1463         encode_getfattr(&xdr, args->bitmask, &hdr);
1464         encode_restorefh(&xdr, &hdr);
1465         encode_getfattr(&xdr, args->bitmask, &hdr);
1466         encode_nops(&hdr);
1467         return 0;
1468 }
1469
1470 /*
1471  * Encode CREATE request
1472  */
1473 static int nfs4_xdr_enc_create(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1474 {
1475         struct xdr_stream xdr;
1476         struct compound_hdr hdr = {
1477                 .nops = 0,
1478         };
1479
1480         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1481         encode_compound_hdr(&xdr, &hdr);
1482         encode_putfh(&xdr, args->dir_fh, &hdr);
1483         encode_savefh(&xdr, &hdr);
1484         encode_create(&xdr, args, &hdr);
1485         encode_getfh(&xdr, &hdr);
1486         encode_getfattr(&xdr, args->bitmask, &hdr);
1487         encode_restorefh(&xdr, &hdr);
1488         encode_getfattr(&xdr, args->bitmask, &hdr);
1489         encode_nops(&hdr);
1490         return 0;
1491 }
1492
1493 /*
1494  * Encode SYMLINK request
1495  */
1496 static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1497 {
1498         return nfs4_xdr_enc_create(req, p, args);
1499 }
1500
1501 /*
1502  * Encode GETATTR request
1503  */
1504 static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, __be32 *p, const struct nfs4_getattr_arg *args)
1505 {
1506         struct xdr_stream xdr;
1507         struct compound_hdr hdr = {
1508                 .nops = 0,
1509         };
1510
1511         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1512         encode_compound_hdr(&xdr, &hdr);
1513         encode_putfh(&xdr, args->fh, &hdr);
1514         encode_getfattr(&xdr, args->bitmask, &hdr);
1515         encode_nops(&hdr);
1516         return 0;
1517 }
1518
1519 /*
1520  * Encode a CLOSE request
1521  */
1522 static int nfs4_xdr_enc_close(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1523 {
1524         struct xdr_stream xdr;
1525         struct compound_hdr hdr = {
1526                 .nops   = 0,
1527         };
1528
1529         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1530         encode_compound_hdr(&xdr, &hdr);
1531         encode_putfh(&xdr, args->fh, &hdr);
1532         encode_close(&xdr, args, &hdr);
1533         encode_getfattr(&xdr, args->bitmask, &hdr);
1534         encode_nops(&hdr);
1535         return 0;
1536 }
1537
1538 /*
1539  * Encode an OPEN request
1540  */
1541 static int nfs4_xdr_enc_open(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1542 {
1543         struct xdr_stream xdr;
1544         struct compound_hdr hdr = {
1545                 .nops = 0,
1546         };
1547
1548         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1549         encode_compound_hdr(&xdr, &hdr);
1550         encode_putfh(&xdr, args->fh, &hdr);
1551         encode_savefh(&xdr, &hdr);
1552         encode_open(&xdr, args, &hdr);
1553         encode_getfh(&xdr, &hdr);
1554         encode_getfattr(&xdr, args->bitmask, &hdr);
1555         encode_restorefh(&xdr, &hdr);
1556         encode_getfattr(&xdr, args->bitmask, &hdr);
1557         encode_nops(&hdr);
1558         return 0;
1559 }
1560
1561 /*
1562  * Encode an OPEN_CONFIRM request
1563  */
1564 static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_open_confirmargs *args)
1565 {
1566         struct xdr_stream xdr;
1567         struct compound_hdr hdr = {
1568                 .nops   = 0,
1569         };
1570
1571         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1572         encode_compound_hdr(&xdr, &hdr);
1573         encode_putfh(&xdr, args->fh, &hdr);
1574         encode_open_confirm(&xdr, args, &hdr);
1575         encode_nops(&hdr);
1576         return 0;
1577 }
1578
1579 /*
1580  * Encode an OPEN request with no attributes.
1581  */
1582 static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1583 {
1584         struct xdr_stream xdr;
1585         struct compound_hdr hdr = {
1586                 .nops   = 0,
1587         };
1588
1589         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1590         encode_compound_hdr(&xdr, &hdr);
1591         encode_putfh(&xdr, args->fh, &hdr);
1592         encode_open(&xdr, args, &hdr);
1593         encode_getfattr(&xdr, args->bitmask, &hdr);
1594         encode_nops(&hdr);
1595         return 0;
1596 }
1597
1598 /*
1599  * Encode an OPEN_DOWNGRADE request
1600  */
1601 static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1602 {
1603         struct xdr_stream xdr;
1604         struct compound_hdr hdr = {
1605                 .nops   = 0,
1606         };
1607
1608         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1609         encode_compound_hdr(&xdr, &hdr);
1610         encode_putfh(&xdr, args->fh, &hdr);
1611         encode_open_downgrade(&xdr, args, &hdr);
1612         encode_getfattr(&xdr, args->bitmask, &hdr);
1613         encode_nops(&hdr);
1614         return 0;
1615 }
1616
1617 /*
1618  * Encode a LOCK request
1619  */
1620 static int nfs4_xdr_enc_lock(struct rpc_rqst *req, __be32 *p, struct nfs_lock_args *args)
1621 {
1622         struct xdr_stream xdr;
1623         struct compound_hdr hdr = {
1624                 .nops   = 0,
1625         };
1626
1627         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1628         encode_compound_hdr(&xdr, &hdr);
1629         encode_putfh(&xdr, args->fh, &hdr);
1630         encode_lock(&xdr, args, &hdr);
1631         encode_nops(&hdr);
1632         return 0;
1633 }
1634
1635 /*
1636  * Encode a LOCKT request
1637  */
1638 static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, __be32 *p, struct nfs_lockt_args *args)
1639 {
1640         struct xdr_stream xdr;
1641         struct compound_hdr hdr = {
1642                 .nops   = 0,
1643         };
1644
1645         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1646         encode_compound_hdr(&xdr, &hdr);
1647         encode_putfh(&xdr, args->fh, &hdr);
1648         encode_lockt(&xdr, args, &hdr);
1649         encode_nops(&hdr);
1650         return 0;
1651 }
1652
1653 /*
1654  * Encode a LOCKU request
1655  */
1656 static int nfs4_xdr_enc_locku(struct rpc_rqst *req, __be32 *p, struct nfs_locku_args *args)
1657 {
1658         struct xdr_stream xdr;
1659         struct compound_hdr hdr = {
1660                 .nops   = 0,
1661         };
1662
1663         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1664         encode_compound_hdr(&xdr, &hdr);
1665         encode_putfh(&xdr, args->fh, &hdr);
1666         encode_locku(&xdr, args, &hdr);
1667         encode_nops(&hdr);
1668         return 0;
1669 }
1670
1671 /*
1672  * Encode a READLINK request
1673  */
1674 static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_readlink *args)
1675 {
1676         struct xdr_stream xdr;
1677         struct compound_hdr hdr = {
1678                 .nops = 0,
1679         };
1680         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1681         unsigned int replen;
1682
1683         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1684         encode_compound_hdr(&xdr, &hdr);
1685         encode_putfh(&xdr, args->fh, &hdr);
1686         encode_readlink(&xdr, args, req, &hdr);
1687
1688         /* set up reply kvec
1689          *    toplevel_status + taglen + rescount + OP_PUTFH + status
1690          *      + OP_READLINK + status + string length = 8
1691          */
1692         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_readlink_sz) << 2;
1693         xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages,
1694                         args->pgbase, args->pglen);
1695         encode_nops(&hdr);
1696         return 0;
1697 }
1698
1699 /*
1700  * Encode a READDIR request
1701  */
1702 static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, __be32 *p, const struct nfs4_readdir_arg *args)
1703 {
1704         struct xdr_stream xdr;
1705         struct compound_hdr hdr = {
1706                 .nops = 0,
1707         };
1708         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1709         int replen;
1710
1711         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1712         encode_compound_hdr(&xdr, &hdr);
1713         encode_putfh(&xdr, args->fh, &hdr);
1714         encode_readdir(&xdr, args, req, &hdr);
1715
1716         /* set up reply kvec
1717          *    toplevel_status + taglen + rescount + OP_PUTFH + status
1718          *      + OP_READDIR + status + verifer(2)  = 9
1719          */
1720         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_readdir_sz) << 2;
1721         xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages,
1722                          args->pgbase, args->count);
1723         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
1724                         __func__, replen, args->pages,
1725                         args->pgbase, args->count);
1726         encode_nops(&hdr);
1727         return 0;
1728 }
1729
1730 /*
1731  * Encode a READ request
1732  */
1733 static int nfs4_xdr_enc_read(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
1734 {
1735         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1736         struct xdr_stream xdr;
1737         struct compound_hdr hdr = {
1738                 .nops = 0,
1739         };
1740         int replen;
1741
1742         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1743         encode_compound_hdr(&xdr, &hdr);
1744         encode_putfh(&xdr, args->fh, &hdr);
1745         encode_read(&xdr, args, &hdr);
1746
1747         /* set up reply kvec
1748          *    toplevel status + taglen=0 + rescount + OP_PUTFH + status
1749          *       + OP_READ + status + eof + datalen = 9
1750          */
1751         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_read_sz) << 2;
1752         xdr_inline_pages(&req->rq_rcv_buf, replen,
1753                          args->pages, args->pgbase, args->count);
1754         req->rq_rcv_buf.flags |= XDRBUF_READ;
1755         encode_nops(&hdr);
1756         return 0;
1757 }
1758
1759 /*
1760  * Encode an SETATTR request
1761  */
1762 static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, __be32 *p, struct nfs_setattrargs *args)
1763 {
1764         struct xdr_stream xdr;
1765         struct compound_hdr hdr = {
1766                 .nops   = 0,
1767         };
1768
1769         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1770         encode_compound_hdr(&xdr, &hdr);
1771         encode_putfh(&xdr, args->fh, &hdr);
1772         encode_setattr(&xdr, args, args->server, &hdr);
1773         encode_getfattr(&xdr, args->bitmask, &hdr);
1774         encode_nops(&hdr);
1775         return 0;
1776 }
1777
1778 /*
1779  * Encode a GETACL request
1780  */
1781 static int
1782 nfs4_xdr_enc_getacl(struct rpc_rqst *req, __be32 *p,
1783                 struct nfs_getaclargs *args)
1784 {
1785         struct xdr_stream xdr;
1786         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1787         struct compound_hdr hdr = {
1788                 .nops   = 0,
1789         };
1790         int replen;
1791
1792         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1793         encode_compound_hdr(&xdr, &hdr);
1794         encode_putfh(&xdr, args->fh, &hdr);
1795         encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0, &hdr);
1796
1797         /* set up reply buffer: */
1798         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_getacl_sz) << 2;
1799         xdr_inline_pages(&req->rq_rcv_buf, replen,
1800                 args->acl_pages, args->acl_pgbase, args->acl_len);
1801         encode_nops(&hdr);
1802         return 0;
1803 }
1804
1805 /*
1806  * Encode a WRITE request
1807  */
1808 static int nfs4_xdr_enc_write(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
1809 {
1810         struct xdr_stream xdr;
1811         struct compound_hdr hdr = {
1812                 .nops = 0,
1813         };
1814
1815         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1816         encode_compound_hdr(&xdr, &hdr);
1817         encode_putfh(&xdr, args->fh, &hdr);
1818         encode_write(&xdr, args, &hdr);
1819         req->rq_snd_buf.flags |= XDRBUF_WRITE;
1820         encode_getfattr(&xdr, args->bitmask, &hdr);
1821         encode_nops(&hdr);
1822         return 0;
1823 }
1824
1825 /*
1826  *  a COMMIT request
1827  */
1828 static int nfs4_xdr_enc_commit(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
1829 {
1830         struct xdr_stream xdr;
1831         struct compound_hdr hdr = {
1832                 .nops = 0,
1833         };
1834
1835         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1836         encode_compound_hdr(&xdr, &hdr);
1837         encode_putfh(&xdr, args->fh, &hdr);
1838         encode_commit(&xdr, args, &hdr);
1839         encode_getfattr(&xdr, args->bitmask, &hdr);
1840         encode_nops(&hdr);
1841         return 0;
1842 }
1843
1844 /*
1845  * FSINFO request
1846  */
1847 static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs4_fsinfo_arg *args)
1848 {
1849         struct xdr_stream xdr;
1850         struct compound_hdr hdr = {
1851                 .nops   = 0,
1852         };
1853
1854         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1855         encode_compound_hdr(&xdr, &hdr);
1856         encode_putfh(&xdr, args->fh, &hdr);
1857         encode_fsinfo(&xdr, args->bitmask, &hdr);
1858         encode_nops(&hdr);
1859         return 0;
1860 }
1861
1862 /*
1863  * a PATHCONF request
1864  */
1865 static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, __be32 *p, const struct nfs4_pathconf_arg *args)
1866 {
1867         struct xdr_stream xdr;
1868         struct compound_hdr hdr = {
1869                 .nops = 0,
1870         };
1871
1872         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1873         encode_compound_hdr(&xdr, &hdr);
1874         encode_putfh(&xdr, args->fh, &hdr);
1875         encode_getattr_one(&xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
1876                            &hdr);
1877         encode_nops(&hdr);
1878         return 0;
1879 }
1880
1881 /*
1882  * a STATFS request
1883  */
1884 static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, __be32 *p, const struct nfs4_statfs_arg *args)
1885 {
1886         struct xdr_stream xdr;
1887         struct compound_hdr hdr = {
1888                 .nops = 0,
1889         };
1890
1891         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1892         encode_compound_hdr(&xdr, &hdr);
1893         encode_putfh(&xdr, args->fh, &hdr);
1894         encode_getattr_two(&xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
1895                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
1896         encode_nops(&hdr);
1897         return 0;
1898 }
1899
1900 /*
1901  * GETATTR_BITMAP request
1902  */
1903 static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, __be32 *p, const struct nfs_fh *fhandle)
1904 {
1905         struct xdr_stream xdr;
1906         struct compound_hdr hdr = {
1907                 .nops = 0,
1908         };
1909
1910         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1911         encode_compound_hdr(&xdr, &hdr);
1912         encode_putfh(&xdr, fhandle, &hdr);
1913         encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
1914                            FATTR4_WORD0_LINK_SUPPORT|
1915                            FATTR4_WORD0_SYMLINK_SUPPORT|
1916                            FATTR4_WORD0_ACLSUPPORT, &hdr);
1917         encode_nops(&hdr);
1918         return 0;
1919 }
1920
1921 /*
1922  * a RENEW request
1923  */
1924 static int nfs4_xdr_enc_renew(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
1925 {
1926         struct xdr_stream xdr;
1927         struct compound_hdr hdr = {
1928                 .nops   = 0,
1929         };
1930
1931         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1932         encode_compound_hdr(&xdr, &hdr);
1933         encode_renew(&xdr, clp, &hdr);
1934         encode_nops(&hdr);
1935         return 0;
1936 }
1937
1938 /*
1939  * a SETCLIENTID request
1940  */
1941 static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid *sc)
1942 {
1943         struct xdr_stream xdr;
1944         struct compound_hdr hdr = {
1945                 .nops   = 0,
1946         };
1947
1948         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1949         encode_compound_hdr(&xdr, &hdr);
1950         encode_setclientid(&xdr, sc, &hdr);
1951         encode_nops(&hdr);
1952         return 0;
1953 }
1954
1955 /*
1956  * a SETCLIENTID_CONFIRM request
1957  */
1958 static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
1959 {
1960         struct xdr_stream xdr;
1961         struct compound_hdr hdr = {
1962                 .nops   = 0,
1963         };
1964         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
1965
1966         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1967         encode_compound_hdr(&xdr, &hdr);
1968         encode_setclientid_confirm(&xdr, clp, &hdr);
1969         encode_putrootfh(&xdr, &hdr);
1970         encode_fsinfo(&xdr, lease_bitmap, &hdr);
1971         encode_nops(&hdr);
1972         return 0;
1973 }
1974
1975 /*
1976  * DELEGRETURN request
1977  */
1978 static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, __be32 *p, const struct nfs4_delegreturnargs *args)
1979 {
1980         struct xdr_stream xdr;
1981         struct compound_hdr hdr = {
1982                 .nops = 0,
1983         };
1984
1985         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1986         encode_compound_hdr(&xdr, &hdr);
1987         encode_putfh(&xdr, args->fhandle, &hdr);
1988         encode_delegreturn(&xdr, args->stateid, &hdr);
1989         encode_getfattr(&xdr, args->bitmask, &hdr);
1990         encode_nops(&hdr);
1991         return 0;
1992 }
1993
1994 /*
1995  * Encode FS_LOCATIONS request
1996  */
1997 static int nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations_arg *args)
1998 {
1999         struct xdr_stream xdr;
2000         struct compound_hdr hdr = {
2001                 .nops = 0,
2002         };
2003         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
2004         int replen;
2005
2006         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2007         encode_compound_hdr(&xdr, &hdr);
2008         encode_putfh(&xdr, args->dir_fh, &hdr);
2009         encode_lookup(&xdr, args->name, &hdr);
2010         encode_fs_locations(&xdr, args->bitmask, &hdr);
2011
2012         /* set up reply
2013          *   toplevel_status + OP_PUTFH + status
2014          *   + OP_LOOKUP + status + OP_GETATTR + status = 7
2015          */
2016         replen = (RPC_REPHDRSIZE + auth->au_rslack + 7) << 2;
2017         xdr_inline_pages(&req->rq_rcv_buf, replen, &args->page,
2018                         0, PAGE_SIZE);
2019         encode_nops(&hdr);
2020         return 0;
2021 }
2022
2023 /*
2024  * START OF "GENERIC" DECODE ROUTINES.
2025  *   These may look a little ugly since they are imported from a "generic"
2026  * set of XDR encode/decode routines which are intended to be shared by
2027  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
2028  *
2029  * If the pain of reading these is too great, it should be a straightforward
2030  * task to translate them into Linux-specific versions which are more
2031  * consistent with the style used in NFSv2/v3...
2032  */
2033 #define READ32(x)         (x) = ntohl(*p++)
2034 #define READ64(x)         do {                  \
2035         (x) = (u64)ntohl(*p++) << 32;           \
2036         (x) |= ntohl(*p++);                     \
2037 } while (0)
2038 #define READTIME(x)       do {                  \
2039         p++;                                    \
2040         (x.tv_sec) = ntohl(*p++);               \
2041         (x.tv_nsec) = ntohl(*p++);              \
2042 } while (0)
2043 #define COPYMEM(x,nbytes) do {                  \
2044         memcpy((x), p, nbytes);                 \
2045         p += XDR_QUADLEN(nbytes);               \
2046 } while (0)
2047
2048 #define READ_BUF(nbytes)  do { \
2049         p = xdr_inline_decode(xdr, nbytes); \
2050         if (unlikely(!p)) { \
2051                 dprintk("nfs: %s: prematurely hit end of receive" \
2052                                 " buffer\n", __func__); \
2053                 dprintk("nfs: %s: xdr->p=%p, bytes=%u, xdr->end=%p\n", \
2054                                 __func__, xdr->p, nbytes, xdr->end); \
2055                 return -EIO; \
2056         } \
2057 } while (0)
2058
2059 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2060 {
2061         __be32 *p;
2062
2063         READ_BUF(4);
2064         READ32(*len);
2065         READ_BUF(*len);
2066         *string = (char *)p;
2067         return 0;
2068 }
2069
2070 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2071 {
2072         __be32 *p;
2073
2074         READ_BUF(8);
2075         READ32(hdr->status);
2076         READ32(hdr->taglen);
2077
2078         READ_BUF(hdr->taglen + 4);
2079         hdr->tag = (char *)p;
2080         p += XDR_QUADLEN(hdr->taglen);
2081         READ32(hdr->nops);
2082         if (unlikely(hdr->nops < 1))
2083                 return nfs4_stat_to_errno(hdr->status);
2084         return 0;
2085 }
2086
2087 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2088 {
2089         __be32 *p;
2090         uint32_t opnum;
2091         int32_t nfserr;
2092
2093         READ_BUF(8);
2094         READ32(opnum);
2095         if (opnum != expected) {
2096                 dprintk("nfs: Server returned operation"
2097                         " %d but we issued a request for %d\n",
2098                                 opnum, expected);
2099                 return -EIO;
2100         }
2101         READ32(nfserr);
2102         if (nfserr != NFS_OK)
2103                 return nfs4_stat_to_errno(nfserr);
2104         return 0;
2105 }
2106
2107 /* Dummy routine */
2108 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2109 {
2110         __be32 *p;
2111         unsigned int strlen;
2112         char *str;
2113
2114         READ_BUF(12);
2115         return decode_opaque_inline(xdr, &strlen, &str);
2116 }
2117
2118 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2119 {
2120         uint32_t bmlen;
2121         __be32 *p;
2122
2123         READ_BUF(4);
2124         READ32(bmlen);
2125
2126         bitmap[0] = bitmap[1] = 0;
2127         READ_BUF((bmlen << 2));
2128         if (bmlen > 0) {
2129                 READ32(bitmap[0]);
2130                 if (bmlen > 1)
2131                         READ32(bitmap[1]);
2132         }
2133         return 0;
2134 }
2135
2136 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
2137 {
2138         __be32 *p;
2139
2140         READ_BUF(4);
2141         READ32(*attrlen);
2142         *savep = xdr->p;
2143         return 0;
2144 }
2145
2146 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2147 {
2148         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2149                 decode_attr_bitmap(xdr, bitmask);
2150                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2151         } else
2152                 bitmask[0] = bitmask[1] = 0;
2153         dprintk("%s: bitmask=%08x:%08x\n", __func__, bitmask[0], bitmask[1]);
2154         return 0;
2155 }
2156
2157 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2158 {
2159         __be32 *p;
2160
2161         *type = 0;
2162         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2163                 return -EIO;
2164         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2165                 READ_BUF(4);
2166                 READ32(*type);
2167                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2168                         dprintk("%s: bad type %d\n", __func__, *type);
2169                         return -EIO;
2170                 }
2171                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2172         }
2173         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
2174         return 0;
2175 }
2176
2177 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2178 {
2179         __be32 *p;
2180
2181         *change = 0;
2182         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2183                 return -EIO;
2184         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2185                 READ_BUF(8);
2186                 READ64(*change);
2187                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2188         }
2189         dprintk("%s: change attribute=%Lu\n", __func__,
2190                         (unsigned long long)*change);
2191         return 0;
2192 }
2193
2194 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2195 {
2196         __be32 *p;
2197
2198         *size = 0;
2199         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2200                 return -EIO;
2201         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2202                 READ_BUF(8);
2203                 READ64(*size);
2204                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2205         }
2206         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
2207         return 0;
2208 }
2209
2210 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2211 {
2212         __be32 *p;
2213
2214         *res = 0;
2215         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2216                 return -EIO;
2217         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2218                 READ_BUF(4);
2219                 READ32(*res);
2220                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2221         }
2222         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
2223         return 0;
2224 }
2225
2226 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2227 {
2228         __be32 *p;
2229
2230         *res = 0;
2231         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2232                 return -EIO;
2233         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2234                 READ_BUF(4);
2235                 READ32(*res);
2236                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2237         }
2238         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
2239         return 0;
2240 }
2241
2242 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
2243 {
2244         __be32 *p;
2245
2246         fsid->major = 0;
2247         fsid->minor = 0;
2248         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2249                 return -EIO;
2250         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2251                 READ_BUF(16);
2252                 READ64(fsid->major);
2253                 READ64(fsid->minor);
2254                 bitmap[0] &= ~FATTR4_WORD0_FSID;
2255         }
2256         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
2257                         (unsigned long long)fsid->major,
2258                         (unsigned long long)fsid->minor);
2259         return 0;
2260 }
2261
2262 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2263 {
2264         __be32 *p;
2265
2266         *res = 60;
2267         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2268                 return -EIO;
2269         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2270                 READ_BUF(4);
2271                 READ32(*res);
2272                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2273         }
2274         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
2275         return 0;
2276 }
2277
2278 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2279 {
2280         __be32 *p;
2281
2282         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2283         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2284                 return -EIO;
2285         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2286                 READ_BUF(4);
2287                 READ32(*res);
2288                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2289         }
2290         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
2291         return 0;
2292 }
2293
2294 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2295 {
2296         __be32 *p;
2297
2298         *fileid = 0;
2299         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2300                 return -EIO;
2301         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2302                 READ_BUF(8);
2303                 READ64(*fileid);
2304                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2305         }
2306         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2307         return 0;
2308 }
2309
2310 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2311 {
2312         __be32 *p;
2313
2314         *fileid = 0;
2315         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
2316                 return -EIO;
2317         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
2318                 READ_BUF(8);
2319                 READ64(*fileid);
2320                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
2321         }
2322         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2323         return 0;
2324 }
2325
2326 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2327 {
2328         __be32 *p;
2329         int status = 0;
2330
2331         *res = 0;
2332         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
2333                 return -EIO;
2334         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
2335                 READ_BUF(8);
2336                 READ64(*res);
2337                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
2338         }
2339         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
2340         return status;
2341 }
2342
2343 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2344 {
2345         __be32 *p;
2346         int status = 0;
2347
2348         *res = 0;
2349         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
2350                 return -EIO;
2351         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
2352                 READ_BUF(8);
2353                 READ64(*res);
2354                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
2355         }
2356         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
2357         return status;
2358 }
2359
2360 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2361 {
2362         __be32 *p;
2363         int status = 0;
2364
2365         *res = 0;
2366         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
2367                 return -EIO;
2368         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
2369                 READ_BUF(8);
2370                 READ64(*res);
2371                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
2372         }
2373         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
2374         return status;
2375 }
2376
2377 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
2378 {
2379         u32 n;
2380         __be32 *p;
2381         int status = 0;
2382
2383         READ_BUF(4);
2384         READ32(n);
2385         if (n == 0)
2386                 goto root_path;
2387         dprintk("path ");
2388         path->ncomponents = 0;
2389         while (path->ncomponents < n) {
2390                 struct nfs4_string *component = &path->components[path->ncomponents];
2391                 status = decode_opaque_inline(xdr, &component->len, &component->data);
2392                 if (unlikely(status != 0))
2393                         goto out_eio;
2394                 if (path->ncomponents != n)
2395                         dprintk("/");
2396                 dprintk("%s", component->data);
2397                 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
2398                         path->ncomponents++;
2399                 else {
2400                         dprintk("cannot parse %d components in path\n", n);
2401                         goto out_eio;
2402                 }
2403         }
2404 out:
2405         dprintk("\n");
2406         return status;
2407 root_path:
2408 /* a root pathname is sent as a zero component4 */
2409         path->ncomponents = 1;
2410         path->components[0].len=0;
2411         path->components[0].data=NULL;
2412         dprintk("path /\n");
2413         goto out;
2414 out_eio:
2415         dprintk(" status %d", status);
2416         status = -EIO;
2417         goto out;
2418 }
2419
2420 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
2421 {
2422         int n;
2423         __be32 *p;
2424         int status = -EIO;
2425
2426         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
2427                 goto out;
2428         status = 0;
2429         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
2430                 goto out;
2431         dprintk("%s: fsroot ", __func__);
2432         status = decode_pathname(xdr, &res->fs_path);
2433         if (unlikely(status != 0))
2434                 goto out;
2435         READ_BUF(4);
2436         READ32(n);
2437         if (n <= 0)
2438                 goto out_eio;
2439         res->nlocations = 0;
2440         while (res->nlocations < n) {
2441                 u32 m;
2442                 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
2443
2444                 READ_BUF(4);
2445                 READ32(m);
2446
2447                 loc->nservers = 0;
2448                 dprintk("%s: servers ", __func__);
2449                 while (loc->nservers < m) {
2450                         struct nfs4_string *server = &loc->servers[loc->nservers];
2451                         status = decode_opaque_inline(xdr, &server->len, &server->data);
2452                         if (unlikely(status != 0))
2453                                 goto out_eio;
2454                         dprintk("%s ", server->data);
2455                         if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
2456                                 loc->nservers++;
2457                         else {
2458                                 unsigned int i;
2459                                 dprintk("%s: using first %u of %u servers "
2460                                         "returned for location %u\n",
2461                                                 __func__,
2462                                                 NFS4_FS_LOCATION_MAXSERVERS,
2463                                                 m, res->nlocations);
2464                                 for (i = loc->nservers; i < m; i++) {
2465                                         unsigned int len;
2466                                         char *data;
2467                                         status = decode_opaque_inline(xdr, &len, &data);
2468                                         if (unlikely(status != 0))
2469                                                 goto out_eio;
2470                                 }
2471                         }
2472                 }
2473                 status = decode_pathname(xdr, &loc->rootpath);
2474                 if (unlikely(status != 0))
2475                         goto out_eio;
2476                 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
2477                         res->nlocations++;
2478         }
2479 out:
2480         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
2481         return status;
2482 out_eio:
2483         status = -EIO;
2484         goto out;
2485 }
2486
2487 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2488 {
2489         __be32 *p;
2490         int status = 0;
2491
2492         *res = 0;
2493         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
2494                 return -EIO;
2495         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
2496                 READ_BUF(8);
2497                 READ64(*res);
2498                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
2499         }
2500         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
2501         return status;
2502 }
2503
2504 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
2505 {
2506         __be32 *p;
2507         int status = 0;
2508
2509         *maxlink = 1;
2510         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
2511                 return -EIO;
2512         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
2513                 READ_BUF(4);
2514                 READ32(*maxlink);
2515                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
2516         }
2517         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
2518         return status;
2519 }
2520
2521 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
2522 {
2523         __be32 *p;
2524         int status = 0;
2525
2526         *maxname = 1024;
2527         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
2528                 return -EIO;
2529         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
2530                 READ_BUF(4);
2531                 READ32(*maxname);
2532                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
2533         }
2534         dprintk("%s: maxname=%u\n", __func__, *maxname);
2535         return status;
2536 }
2537
2538 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2539 {
2540         __be32 *p;
2541         int status = 0;
2542
2543         *res = 1024;
2544         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
2545                 return -EIO;
2546         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
2547                 uint64_t maxread;
2548                 READ_BUF(8);
2549                 READ64(maxread);
2550                 if (maxread > 0x7FFFFFFF)
2551                         maxread = 0x7FFFFFFF;
2552                 *res = (uint32_t)maxread;
2553                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
2554         }
2555         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
2556         return status;
2557 }
2558
2559 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2560 {
2561         __be32 *p;
2562         int status = 0;
2563
2564         *res = 1024;
2565         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
2566                 return -EIO;
2567         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
2568                 uint64_t maxwrite;
2569                 READ_BUF(8);
2570                 READ64(maxwrite);
2571                 if (maxwrite > 0x7FFFFFFF)
2572                         maxwrite = 0x7FFFFFFF;
2573                 *res = (uint32_t)maxwrite;
2574                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
2575         }
2576         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
2577         return status;
2578 }
2579
2580 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
2581 {
2582         uint32_t tmp;
2583         __be32 *p;
2584
2585         *mode = 0;
2586         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
2587                 return -EIO;
2588         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
2589                 READ_BUF(4);
2590                 READ32(tmp);
2591                 *mode = tmp & ~S_IFMT;
2592                 bitmap[1] &= ~FATTR4_WORD1_MODE;
2593         }
2594         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
2595         return 0;
2596 }
2597
2598 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
2599 {
2600         __be32 *p;
2601
2602         *nlink = 1;
2603         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
2604                 return -EIO;
2605         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
2606                 READ_BUF(4);
2607                 READ32(*nlink);
2608                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
2609         }
2610         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
2611         return 0;
2612 }
2613
2614 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *uid)
2615 {
2616         uint32_t len;
2617         __be32 *p;
2618
2619         *uid = -2;
2620         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
2621                 return -EIO;
2622         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
2623                 READ_BUF(4);
2624                 READ32(len);
2625                 READ_BUF(len);
2626                 if (len < XDR_MAX_NETOBJ) {
2627                         if (nfs_map_name_to_uid(clp, (char *)p, len, uid) != 0)
2628                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
2629                                                 __func__);
2630                 } else
2631                         dprintk("%s: name too long (%u)!\n",
2632                                         __func__, len);
2633                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
2634         }
2635         dprintk("%s: uid=%d\n", __func__, (int)*uid);
2636         return 0;
2637 }
2638
2639 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *gid)
2640 {
2641         uint32_t len;
2642         __be32 *p;
2643
2644         *gid = -2;
2645         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
2646                 return -EIO;
2647         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
2648                 READ_BUF(4);
2649                 READ32(len);
2650                 READ_BUF(len);
2651                 if (len < XDR_MAX_NETOBJ) {
2652                         if (nfs_map_group_to_gid(clp, (char *)p, len, gid) != 0)
2653                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
2654                                                 __func__);
2655                 } else
2656                         dprintk("%s: name too long (%u)!\n",
2657                                         __func__, len);
2658                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
2659         }
2660         dprintk("%s: gid=%d\n", __func__, (int)*gid);
2661         return 0;
2662 }
2663
2664 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
2665 {
2666         uint32_t major = 0, minor = 0;
2667         __be32 *p;
2668
2669         *rdev = MKDEV(0,0);
2670         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
2671                 return -EIO;
2672         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
2673                 dev_t tmp;
2674
2675                 READ_BUF(8);
2676                 READ32(major);
2677                 READ32(minor);
2678                 tmp = MKDEV(major, minor);
2679                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
2680                         *rdev = tmp;
2681                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
2682         }
2683         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
2684         return 0;
2685 }
2686
2687 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2688 {
2689         __be32 *p;
2690         int status = 0;
2691
2692         *res = 0;
2693         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
2694                 return -EIO;
2695         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
2696                 READ_BUF(8);
2697                 READ64(*res);
2698                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
2699         }
2700         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
2701         return status;
2702 }
2703
2704 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2705 {
2706         __be32 *p;
2707         int status = 0;
2708
2709         *res = 0;
2710         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
2711                 return -EIO;
2712         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
2713                 READ_BUF(8);
2714                 READ64(*res);
2715                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
2716         }
2717         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
2718         return status;
2719 }
2720
2721 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2722 {
2723         __be32 *p;
2724         int status = 0;
2725
2726         *res = 0;
2727         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
2728                 return -EIO;
2729         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
2730                 READ_BUF(8);
2731                 READ64(*res);
2732                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
2733         }
2734         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
2735         return status;
2736 }
2737
2738 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
2739 {
2740         __be32 *p;
2741
2742         *used = 0;
2743         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
2744                 return -EIO;
2745         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
2746                 READ_BUF(8);
2747                 READ64(*used);
2748                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
2749         }
2750         dprintk("%s: space used=%Lu\n", __func__,
2751                         (unsigned long long)*used);
2752         return 0;
2753 }
2754
2755 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
2756 {
2757         __be32 *p;
2758         uint64_t sec;
2759         uint32_t nsec;
2760
2761         READ_BUF(12);
2762         READ64(sec);
2763         READ32(nsec);
2764         time->tv_sec = (time_t)sec;
2765         time->tv_nsec = (long)nsec;
2766         return 0;
2767 }
2768
2769 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2770 {
2771         int status = 0;
2772
2773         time->tv_sec = 0;
2774         time->tv_nsec = 0;
2775         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
2776                 return -EIO;
2777         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
2778                 status = decode_attr_time(xdr, time);
2779                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
2780         }
2781         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
2782         return status;
2783 }
2784
2785 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2786 {
2787         int status = 0;
2788
2789         time->tv_sec = 0;
2790         time->tv_nsec = 0;
2791         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
2792                 return -EIO;
2793         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
2794                 status = decode_attr_time(xdr, time);
2795                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
2796         }
2797         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
2798         return status;
2799 }
2800
2801 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2802 {
2803         int status = 0;
2804
2805         time->tv_sec = 0;
2806         time->tv_nsec = 0;
2807         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
2808                 return -EIO;
2809         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
2810                 status = decode_attr_time(xdr, time);
2811                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
2812         }
2813         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
2814         return status;
2815 }
2816
2817 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
2818 {
2819         unsigned int attrwords = XDR_QUADLEN(attrlen);
2820         unsigned int nwords = xdr->p - savep;
2821
2822         if (unlikely(attrwords != nwords)) {
2823                 dprintk("%s: server returned incorrect attribute length: "
2824                         "%u %c %u\n",
2825                                 __func__,
2826                                 attrwords << 2,
2827                                 (attrwords < nwords) ? '<' : '>',
2828                                 nwords << 2);
2829                 return -EIO;
2830         }
2831         return 0;
2832 }
2833
2834 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2835 {
2836         __be32 *p;
2837
2838         READ_BUF(20);
2839         READ32(cinfo->atomic);
2840         READ64(cinfo->before);
2841         READ64(cinfo->after);
2842         return 0;
2843 }
2844
2845 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
2846 {
2847         __be32 *p;
2848         uint32_t supp, acc;
2849         int status;
2850
2851         status = decode_op_hdr(xdr, OP_ACCESS);
2852         if (status)
2853                 return status;
2854         READ_BUF(8);
2855         READ32(supp);
2856         READ32(acc);
2857         access->supported = supp;
2858         access->access = acc;
2859         return 0;
2860 }
2861
2862 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
2863 {
2864         __be32 *p;
2865         int status;
2866
2867         status = decode_op_hdr(xdr, OP_CLOSE);
2868         if (status != -EIO)
2869                 nfs_increment_open_seqid(status, res->seqid);
2870         if (status)
2871                 return status;
2872         READ_BUF(NFS4_STATEID_SIZE);
2873         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
2874         return 0;
2875 }
2876
2877 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
2878 {
2879         __be32 *p;
2880         int status;
2881
2882         status = decode_op_hdr(xdr, OP_COMMIT);
2883         if (status)
2884                 return status;
2885         READ_BUF(8);
2886         COPYMEM(res->verf->verifier, 8);
2887         return 0;
2888 }
2889
2890 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2891 {
2892         __be32 *p;
2893         uint32_t bmlen;
2894         int status;
2895
2896         status = decode_op_hdr(xdr, OP_CREATE);
2897         if (status)
2898                 return status;
2899         if ((status = decode_change_info(xdr, cinfo)))
2900                 return status;
2901         READ_BUF(4);
2902         READ32(bmlen);
2903         READ_BUF(bmlen << 2);
2904         return 0;
2905 }
2906
2907 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
2908 {
2909         __be32 *savep;
2910         uint32_t attrlen, bitmap[2] = {0};
2911         int status;
2912
2913         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2914                 goto xdr_error;
2915         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2916                 goto xdr_error;
2917         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2918                 goto xdr_error;
2919         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
2920                 goto xdr_error;
2921         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
2922                 goto xdr_error;
2923         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
2924                 goto xdr_error;
2925         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
2926                 goto xdr_error;
2927         status = verify_attr_len(xdr, savep, attrlen);
2928 xdr_error:
2929         dprintk("%s: xdr returned %d!\n", __func__, -status);
2930         return status;
2931 }
2932
2933 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
2934 {
2935         __be32 *savep;
2936         uint32_t attrlen, bitmap[2] = {0};
2937         int status;
2938
2939         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2940                 goto xdr_error;
2941         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2942                 goto xdr_error;
2943         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2944                 goto xdr_error;
2945
2946         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
2947                 goto xdr_error;
2948         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
2949                 goto xdr_error;
2950         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
2951                 goto xdr_error;
2952         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
2953                 goto xdr_error;
2954         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
2955                 goto xdr_error;
2956         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
2957                 goto xdr_error;
2958
2959         status = verify_attr_len(xdr, savep, attrlen);
2960 xdr_error:
2961         dprintk("%s: xdr returned %d!\n", __func__, -status);
2962         return status;
2963 }
2964
2965 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
2966 {
2967         __be32 *savep;
2968         uint32_t attrlen, bitmap[2] = {0};
2969         int status;
2970
2971         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2972                 goto xdr_error;
2973         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2974                 goto xdr_error;
2975         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2976                 goto xdr_error;
2977
2978         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
2979                 goto xdr_error;
2980         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
2981                 goto xdr_error;
2982
2983         status = verify_attr_len(xdr, savep, attrlen);
2984 xdr_error:
2985         dprintk("%s: xdr returned %d!\n", __func__, -status);
2986         return status;
2987 }
2988
2989 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr, const struct nfs_server *server)
2990 {
2991         __be32 *savep;
2992         uint32_t attrlen,
2993                  bitmap[2] = {0},
2994                  type;
2995         int status;
2996         umode_t fmode = 0;
2997         uint64_t fileid;
2998
2999         status = decode_op_hdr(xdr, OP_GETATTR);
3000         if (status < 0)
3001                 goto xdr_error;
3002
3003         status = decode_attr_bitmap(xdr, bitmap);
3004         if (status < 0)
3005                 goto xdr_error;
3006
3007         status = decode_attr_length(xdr, &attrlen, &savep);
3008         if (status < 0)
3009                 goto xdr_error;
3010
3011
3012         status = decode_attr_type(xdr, bitmap, &type);
3013         if (status < 0)
3014                 goto xdr_error;
3015         fattr->mode = nfs_type2fmt[type];
3016
3017         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
3018         if (status < 0)
3019                 goto xdr_error;
3020
3021         status = decode_attr_size(xdr, bitmap, &fattr->size);
3022         if (status < 0)
3023                 goto xdr_error;
3024
3025         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
3026         if (status < 0)
3027                 goto xdr_error;
3028
3029         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
3030         if (status < 0)
3031                 goto xdr_error;
3032
3033         status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
3034                                                 struct nfs4_fs_locations,
3035                                                 fattr));
3036         if (status < 0)
3037                 goto xdr_error;
3038
3039         status = decode_attr_mode(xdr, bitmap, &fmode);
3040         if (status < 0)
3041                 goto xdr_error;
3042         fattr->mode |= fmode;
3043
3044         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
3045         if (status < 0)
3046                 goto xdr_error;
3047
3048         status = decode_attr_owner(xdr, bitmap, server->nfs_client, &fattr->uid);
3049         if (status < 0)
3050                 goto xdr_error;
3051
3052         status = decode_attr_group(xdr, bitmap, server->nfs_client, &fattr->gid);
3053         if (status < 0)
3054                 goto xdr_error;
3055
3056         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
3057         if (status < 0)
3058                 goto xdr_error;
3059
3060         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
3061         if (status < 0)
3062                 goto xdr_error;
3063
3064         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
3065         if (status < 0)
3066                 goto xdr_error;
3067
3068         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
3069         if (status < 0)
3070                 goto xdr_error;
3071
3072         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
3073         if (status < 0)
3074                 goto xdr_error;
3075
3076         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid);
3077         if (status < 0)
3078                 goto xdr_error;
3079         if (fattr->fileid == 0 && fileid != 0)
3080                 fattr->fileid = fileid;
3081
3082         status = verify_attr_len(xdr, savep, attrlen);
3083         if (status == 0)
3084                 fattr->valid = NFS_ATTR_FATTR_V4;
3085 xdr_error:
3086         dprintk("%s: xdr returned %d\n", __func__, -status);
3087         return status;
3088 }
3089
3090
3091 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
3092 {
3093         __be32 *savep;
3094         uint32_t attrlen, bitmap[2];
3095         int status;
3096
3097         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3098                 goto xdr_error;
3099         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3100                 goto xdr_error;
3101         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3102                 goto xdr_error;
3103
3104         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
3105
3106         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
3107                 goto xdr_error;
3108         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
3109                 goto xdr_error;
3110         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
3111                 goto xdr_error;
3112         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
3113         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
3114                 goto xdr_error;
3115         fsinfo->wtpref = fsinfo->wtmax;
3116
3117         status = verify_attr_len(xdr, savep, attrlen);
3118 xdr_error:
3119         dprintk("%s: xdr returned %d!\n", __func__, -status);
3120         return status;
3121 }
3122
3123 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
3124 {
3125         __be32 *p;
3126         uint32_t len;
3127         int status;
3128
3129         /* Zero handle first to allow comparisons */
3130         memset(fh, 0, sizeof(*fh));
3131
3132         status = decode_op_hdr(xdr, OP_GETFH);
3133         if (status)
3134                 return status;
3135
3136         READ_BUF(4);
3137         READ32(len);
3138         if (len > NFS4_FHSIZE)
3139                 return -EIO;
3140         fh->size = len;
3141         READ_BUF(len);
3142         COPYMEM(fh->data, len);
3143         return 0;
3144 }
3145
3146 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3147 {
3148         int status;
3149
3150         status = decode_op_hdr(xdr, OP_LINK);
3151         if (status)
3152                 return status;
3153         return decode_change_info(xdr, cinfo);
3154 }
3155
3156 /*
3157  * We create the owner, so we know a proper owner.id length is 4.
3158  */
3159 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
3160 {
3161         uint64_t offset, length, clientid;
3162         __be32 *p;
3163         uint32_t namelen, type;
3164
3165         READ_BUF(32);
3166         READ64(offset);
3167         READ64(length);
3168         READ32(type);
3169         if (fl != NULL) {
3170                 fl->fl_start = (loff_t)offset;
3171                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
3172                 if (length == ~(uint64_t)0)
3173                         fl->fl_end = OFFSET_MAX;
3174                 fl->fl_type = F_WRLCK;
3175                 if (type & 1)
3176                         fl->fl_type = F_RDLCK;
3177                 fl->fl_pid = 0;
3178         }
3179         READ64(clientid);
3180         READ32(namelen);
3181         READ_BUF(namelen);
3182         return -NFS4ERR_DENIED;
3183 }
3184
3185 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
3186 {
3187         __be32 *p;
3188         int status;
3189
3190         status = decode_op_hdr(xdr, OP_LOCK);
3191         if (status == -EIO)
3192                 goto out;
3193         if (status == 0) {
3194                 READ_BUF(NFS4_STATEID_SIZE);
3195                 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3196         } else if (status == -NFS4ERR_DENIED)
3197                 status = decode_lock_denied(xdr, NULL);
3198         if (res->open_seqid != NULL)
3199                 nfs_increment_open_seqid(status, res->open_seqid);
3200         nfs_increment_lock_seqid(status, res->lock_seqid);
3201 out:
3202         return status;
3203 }
3204
3205 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
3206 {
3207         int status;
3208         status = decode_op_hdr(xdr, OP_LOCKT);
3209         if (status == -NFS4ERR_DENIED)
3210                 return decode_lock_denied(xdr, res->denied);
3211         return status;
3212 }
3213
3214 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
3215 {
3216         __be32 *p;
3217         int status;
3218
3219         status = decode_op_hdr(xdr, OP_LOCKU);
3220         if (status != -EIO)
3221                 nfs_increment_lock_seqid(status, res->seqid);
3222         if (status == 0) {
3223                 READ_BUF(NFS4_STATEID_SIZE);
3224                 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3225         }
3226         return status;
3227 }
3228
3229 static int decode_lookup(struct xdr_stream *xdr)
3230 {
3231         return decode_op_hdr(xdr, OP_LOOKUP);
3232 }
3233
3234 /* This is too sick! */
3235 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
3236 {
3237         __be32 *p;
3238         uint32_t limit_type, nblocks, blocksize;
3239
3240         READ_BUF(12);
3241         READ32(limit_type);
3242         switch (limit_type) {
3243         case 1:
3244                 READ64(*maxsize);
3245                 break;
3246         case 2:
3247                 READ32(nblocks);
3248                 READ32(blocksize);
3249                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
3250         }
3251         return 0;
3252 }
3253
3254 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
3255 {
3256         __be32 *p;
3257         uint32_t delegation_type;
3258
3259         READ_BUF(4);
3260         READ32(delegation_type);
3261         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
3262                 res->delegation_type = 0;
3263                 return 0;
3264         }
3265         READ_BUF(NFS4_STATEID_SIZE+4);
3266         COPYMEM(res->delegation.data, NFS4_STATEID_SIZE);
3267         READ32(res->do_recall);
3268
3269         switch (delegation_type) {
3270         case NFS4_OPEN_DELEGATE_READ:
3271                 res->delegation_type = FMODE_READ;
3272                 break;
3273         case NFS4_OPEN_DELEGATE_WRITE:
3274                 res->delegation_type = FMODE_WRITE|FMODE_READ;
3275                 if (decode_space_limit(xdr, &res->maxsize) < 0)
3276                                 return -EIO;
3277         }
3278         return decode_ace(xdr, NULL, res->server->nfs_client);
3279 }
3280
3281 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
3282 {
3283         __be32 *p;
3284         uint32_t savewords, bmlen, i;
3285         int status;
3286
3287         status = decode_op_hdr(xdr, OP_OPEN);
3288         if (status != -EIO)
3289                 nfs_increment_open_seqid(status, res->seqid);
3290         if (status)
3291                 return status;
3292         READ_BUF(NFS4_STATEID_SIZE);
3293         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3294
3295         decode_change_info(xdr, &res->cinfo);
3296
3297         READ_BUF(8);
3298         READ32(res->rflags);
3299         READ32(bmlen);
3300         if (bmlen > 10)
3301                 goto xdr_error;
3302
3303         READ_BUF(bmlen << 2);
3304         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
3305         for (i = 0; i < savewords; ++i)
3306                 READ32(res->attrset[i]);
3307         for (; i < NFS4_BITMAP_SIZE; i++)
3308                 res->attrset[i] = 0;
3309
3310         return decode_delegation(xdr, res);
3311 xdr_error:
3312         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
3313         return -EIO;
3314 }
3315
3316 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
3317 {
3318         __be32 *p;
3319         int status;
3320
3321         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
3322         if (status != -EIO)
3323                 nfs_increment_open_seqid(status, res->seqid);
3324         if (status)
3325                 return status;
3326         READ_BUF(NFS4_STATEID_SIZE);
3327         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3328         return 0;
3329 }
3330
3331 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
3332 {
3333         __be32 *p;
3334         int status;
3335
3336         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
3337         if (status != -EIO)
3338                 nfs_increment_open_seqid(status, res->seqid);
3339         if (status)
3340                 return status;
3341         READ_BUF(NFS4_STATEID_SIZE);
3342         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3343         return 0;
3344 }
3345
3346 static int decode_putfh(struct xdr_stream *xdr)
3347 {
3348         return decode_op_hdr(xdr, OP_PUTFH);
3349 }
3350
3351 static int decode_putrootfh(struct xdr_stream *xdr)
3352 {
3353         return decode_op_hdr(xdr, OP_PUTROOTFH);
3354 }
3355
3356 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
3357 {
3358         struct kvec *iov = req->rq_rcv_buf.head;
3359         __be32 *p;
3360         uint32_t count, eof, recvd, hdrlen;
3361         int status;
3362
3363         status = decode_op_hdr(xdr, OP_READ);
3364         if (status)
3365                 return status;
3366         READ_BUF(8);
3367         READ32(eof);
3368         READ32(count);
3369         hdrlen = (u8 *) p - (u8 *) iov->iov_base;
3370         recvd = req->rq_rcv_buf.len - hdrlen;
3371         if (count > recvd) {
3372                 dprintk("NFS: server cheating in read reply: "
3373                                 "count %u > recvd %u\n", count, recvd);
3374                 count = recvd;
3375                 eof = 0;
3376         }
3377         xdr_read_pages(xdr, count);
3378         res->eof = eof;
3379         res->count = count;
3380         return 0;
3381 }
3382
3383 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
3384 {
3385         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
3386         struct page     *page = *rcvbuf->pages;
3387         struct kvec     *iov = rcvbuf->head;
3388         size_t          hdrlen;
3389         u32             recvd, pglen = rcvbuf->page_len;
3390         __be32          *end, *entry, *p, *kaddr;
3391         unsigned int    nr = 0;
3392         int             status;
3393
3394         status = decode_op_hdr(xdr, OP_READDIR);
3395         if (status)
3396                 return status;
3397         READ_BUF(8);
3398         COPYMEM(readdir->verifier.data, 8);
3399         dprintk("%s: verifier = %08x:%08x\n",
3400                         __func__,
3401                         ((u32 *)readdir->verifier.data)[0],
3402                         ((u32 *)readdir->verifier.data)[1]);
3403
3404
3405         hdrlen = (char *) p - (char *) iov->iov_base;
3406         recvd = rcvbuf->len - hdrlen;
3407         if (pglen > recvd)
3408                 pglen = recvd;
3409         xdr_read_pages(xdr, pglen);
3410
3411         BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
3412         kaddr = p = kmap_atomic(page, KM_USER0);
3413         end = p + ((pglen + readdir->pgbase) >> 2);
3414         entry = p;
3415
3416         /* Make sure the packet actually has a value_follows and EOF entry */
3417         if ((entry + 1) > end)
3418                 goto short_pkt;
3419
3420         for (; *p++; nr++) {
3421                 u32 len, attrlen, xlen;
3422                 if (end - p < 3)
3423                         goto short_pkt;
3424                 dprintk("cookie = %Lu, ", *((unsigned long long *)p));
3425                 p += 2;                 /* cookie */
3426                 len = ntohl(*p++);      /* filename length */
3427                 if (len > NFS4_MAXNAMLEN) {
3428                         dprintk("NFS: giant filename in readdir (len 0x%x)\n",
3429                                         len);
3430                         goto err_unmap;
3431                 }
3432                 xlen = XDR_QUADLEN(len);
3433                 if (end - p < xlen + 1)
3434                         goto short_pkt;
3435                 dprintk("filename = %*s\n", len, (char *)p);
3436                 p += xlen;
3437                 len = ntohl(*p++);      /* bitmap length */
3438                 if (end - p < len + 1)
3439                         goto short_pkt;
3440                 p += len;
3441                 attrlen = XDR_QUADLEN(ntohl(*p++));
3442                 if (end - p < attrlen + 2)
3443                         goto short_pkt;
3444                 p += attrlen;           /* attributes */
3445                 entry = p;
3446         }
3447         /*
3448          * Apparently some server sends responses that are a valid size, but
3449          * contain no entries, and have value_follows==0 and EOF==0. For
3450          * those, just set the EOF marker.
3451          */
3452         if (!nr && entry[1] == 0) {
3453                 dprintk("NFS: readdir reply truncated!\n");
3454                 entry[1] = 1;
3455         }
3456 out:
3457         kunmap_atomic(kaddr, KM_USER0);
3458         return 0;
3459 short_pkt:
3460         /*
3461          * When we get a short packet there are 2 possibilities. We can
3462          * return an error, or fix up the response to look like a valid
3463          * response and return what we have so far. If there are no
3464          * entries and the packet was short, then return -EIO. If there
3465          * are valid entries in the response, return them and pretend that
3466          * the call was successful, but incomplete. The caller can retry the
3467          * readdir starting at the last cookie.
3468          */
3469         dprintk("%s: short packet at entry %d\n", __func__, nr);
3470         entry[0] = entry[1] = 0;
3471         if (nr)
3472                 goto out;
3473 err_unmap:
3474         kunmap_atomic(kaddr, KM_USER0);
3475         return -errno_NFSERR_IO;
3476 }
3477
3478 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
3479 {
3480         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
3481         struct kvec *iov = rcvbuf->head;
3482         size_t hdrlen;
3483         u32 len, recvd;
3484         __be32 *p;
3485         char *kaddr;
3486         int status;
3487
3488         status = decode_op_hdr(xdr, OP_READLINK);
3489         if (status)
3490                 return status;
3491
3492         /* Convert length of symlink */
3493         READ_BUF(4);
3494         READ32(len);
3495         if (len >= rcvbuf->page_len || len <= 0) {
3496                 dprintk("nfs: server returned giant symlink!\n");
3497                 return -ENAMETOOLONG;
3498         }
3499         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
3500         recvd = req->rq_rcv_buf.len - hdrlen;
3501         if (recvd < len) {
3502                 dprintk("NFS: server cheating in readlink reply: "
3503                                 "count %u > recvd %u\n", len, recvd);
3504                 return -EIO;
3505         }
3506         xdr_read_pages(xdr, len);
3507         /*
3508          * The XDR encode routine has set things up so that
3509          * the link text will be copied directly into the
3510          * buffer.  We just have to do overflow-checking,
3511          * and and null-terminate the text (the VFS expects
3512          * null-termination).
3513          */
3514         kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
3515         kaddr[len+rcvbuf->page_base] = '\0';
3516         kunmap_atomic(kaddr, KM_USER0);
3517         return 0;
3518 }
3519
3520 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3521 {
3522         int status;
3523
3524         status = decode_op_hdr(xdr, OP_REMOVE);
3525         if (status)
3526                 goto out;
3527         status = decode_change_info(xdr, cinfo);
3528 out:
3529         return status;
3530 }
3531
3532 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
3533               struct nfs4_change_info *new_cinfo)
3534 {
3535         int status;
3536
3537         status = decode_op_hdr(xdr, OP_RENAME);
3538         if (status)
3539                 goto out;
3540         if ((status = decode_change_info(xdr, old_cinfo)))
3541                 goto out;
3542         status = decode_change_info(xdr, new_cinfo);
3543 out:
3544         return status;
3545 }
3546
3547 static int decode_renew(struct xdr_stream *xdr)
3548 {
3549         return decode_op_hdr(xdr, OP_RENEW);
3550 }
3551
3552 static int
3553 decode_restorefh(struct xdr_stream *xdr)
3554 {
3555         return decode_op_hdr(xdr, OP_RESTOREFH);
3556 }
3557
3558 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
3559                 size_t *acl_len)
3560 {
3561         __be32 *savep;
3562         uint32_t attrlen,
3563                  bitmap[2] = {0};
3564         struct kvec *iov = req->rq_rcv_buf.head;
3565         int status;
3566
3567         *acl_len = 0;
3568         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3569                 goto out;
3570         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3571                 goto out;
3572         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3573                 goto out;
3574
3575         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
3576                 return -EIO;
3577         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
3578                 size_t hdrlen;
3579                 u32 recvd;
3580
3581                 /* We ignore &savep and don't do consistency checks on
3582                  * the attr length.  Let userspace figure it out.... */
3583                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
3584                 recvd = req->rq_rcv_buf.len - hdrlen;
3585                 if (attrlen > recvd) {
3586                         dprintk("NFS: server cheating in getattr"
3587                                         " acl reply: attrlen %u > recvd %u\n",
3588                                         attrlen, recvd);
3589                         return -EINVAL;
3590                 }
3591                 xdr_read_pages(xdr, attrlen);
3592                 *acl_len = attrlen;
3593         } else
3594                 status = -EOPNOTSUPP;
3595
3596 out:
3597         return status;
3598 }
3599
3600 static int
3601 decode_savefh(struct xdr_stream *xdr)
3602 {
3603         return decode_op_hdr(xdr, OP_SAVEFH);
3604 }
3605
3606 static int decode_setattr(struct xdr_stream *xdr, struct nfs_setattrres *res)
3607 {
3608         __be32 *p;
3609         uint32_t bmlen;
3610         int status;
3611
3612         status = decode_op_hdr(xdr, OP_SETATTR);
3613         if (status)
3614                 return status;
3615         READ_BUF(4);
3616         READ32(bmlen);
3617         READ_BUF(bmlen << 2);
3618         return 0;
3619 }
3620
3621 static int decode_setclientid(struct xdr_stream *xdr, struct nfs_client *clp)
3622 {
3623         __be32 *p;
3624         uint32_t opnum;
3625         int32_t nfserr;
3626
3627         READ_BUF(8);
3628         READ32(opnum);
3629         if (opnum != OP_SETCLIENTID) {
3630                 dprintk("nfs: decode_setclientid: Server returned operation"
3631                         " %d\n", opnum);
3632                 return -EIO;
3633         }
3634         READ32(nfserr);
3635         if (nfserr == NFS_OK) {
3636                 READ_BUF(8 + NFS4_VERIFIER_SIZE);
3637                 READ64(clp->cl_clientid);
3638                 COPYMEM(clp->cl_confirm.data, NFS4_VERIFIER_SIZE);
3639         } else if (nfserr == NFSERR_CLID_INUSE) {
3640                 uint32_t len;
3641
3642                 /* skip netid string */
3643                 READ_BUF(4);
3644                 READ32(len);
3645                 READ_BUF(len);
3646
3647                 /* skip uaddr string */
3648                 READ_BUF(4);
3649                 READ32(len);
3650                 READ_BUF(len);
3651                 return -NFSERR_CLID_INUSE;
3652         } else
3653                 return nfs4_stat_to_errno(nfserr);
3654
3655         return 0;
3656 }
3657
3658 static int decode_setclientid_confirm(struct xdr_stream *xdr)
3659 {
3660         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
3661 }
3662
3663 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
3664 {
3665         __be32 *p;
3666         int status;
3667
3668         status = decode_op_hdr(xdr, OP_WRITE);
3669         if (status)
3670                 return status;
3671
3672         READ_BUF(16);
3673         READ32(res->count);
3674         READ32(res->verf->committed);
3675         COPYMEM(res->verf->verifier, 8);
3676         return 0;
3677 }
3678
3679 static int decode_delegreturn(struct xdr_stream *xdr)
3680 {
3681         return decode_op_hdr(xdr, OP_DELEGRETURN);
3682 }
3683
3684 /*
3685  * END OF "GENERIC" DECODE ROUTINES.
3686  */
3687
3688 /*
3689  * Decode OPEN_DOWNGRADE response
3690  */
3691 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
3692 {
3693         struct xdr_stream xdr;
3694         struct compound_hdr hdr;
3695         int status;
3696
3697         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3698         status = decode_compound_hdr(&xdr, &hdr);
3699         if (status)
3700                 goto out;
3701         status = decode_putfh(&xdr);
3702         if (status)
3703                 goto out;
3704         status = decode_open_downgrade(&xdr, res);
3705         if (status != 0)
3706                 goto out;
3707         decode_getfattr(&xdr, res->fattr, res->server);
3708 out:
3709         return status;
3710 }
3711
3712 /*
3713  * Decode ACCESS response
3714  */
3715 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_accessres *res)
3716 {
3717         struct xdr_stream xdr;
3718         struct compound_hdr hdr;
3719         int status;
3720
3721         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3722         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3723                 goto out;
3724         status = decode_putfh(&xdr);
3725         if (status != 0)
3726                 goto out;
3727         status = decode_access(&xdr, res);
3728         if (status != 0)
3729                 goto out;
3730         decode_getfattr(&xdr, res->fattr, res->server);
3731 out:
3732         return status;
3733 }
3734
3735 /*
3736  * Decode LOOKUP response
3737  */
3738 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
3739 {
3740         struct xdr_stream xdr;
3741         struct compound_hdr hdr;
3742         int status;
3743
3744         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3745         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3746                 goto out;
3747         if ((status = decode_putfh(&xdr)) != 0)
3748                 goto out;
3749         if ((status = decode_lookup(&xdr)) != 0)
3750                 goto out;
3751         if ((status = decode_getfh(&xdr, res->fh)) != 0)
3752                 goto out;
3753         status = decode_getfattr(&xdr, res->fattr, res->server);
3754 out:
3755         return status;
3756 }
3757
3758 /*
3759  * Decode LOOKUP_ROOT response
3760  */
3761 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
3762 {
3763         struct xdr_stream xdr;
3764         struct compound_hdr hdr;
3765         int status;
3766
3767         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3768         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3769                 goto out;
3770         if ((status = decode_putrootfh(&xdr)) != 0)
3771                 goto out;
3772         if ((status = decode_getfh(&xdr, res->fh)) == 0)
3773                 status = decode_getfattr(&xdr, res->fattr, res->server);
3774 out:
3775         return status;
3776 }
3777
3778 /*
3779  * Decode REMOVE response
3780  */
3781 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, __be32 *p, struct nfs_removeres *res)
3782 {
3783         struct xdr_stream xdr;
3784         struct compound_hdr hdr;
3785         int status;
3786
3787         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3788         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3789                 goto out;
3790         if ((status = decode_putfh(&xdr)) != 0)
3791                 goto out;
3792         if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
3793                 goto out;
3794         decode_getfattr(&xdr, &res->dir_attr, res->server);
3795 out:
3796         return status;
3797 }
3798
3799 /*
3800  * Decode RENAME response
3801  */
3802 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_rename_res *res)
3803 {
3804         struct xdr_stream xdr;
3805         struct compound_hdr hdr;
3806         int status;
3807
3808         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3809         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3810                 goto out;
3811         if ((status = decode_putfh(&xdr)) != 0)
3812                 goto out;
3813         if ((status = decode_savefh(&xdr)) != 0)
3814                 goto out;
3815         if ((status = decode_putfh(&xdr)) != 0)
3816                 goto out;
3817         if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0)
3818                 goto out;
3819         /* Current FH is target directory */
3820         if (decode_getfattr(&xdr, res->new_fattr, res->server) != 0)
3821                 goto out;
3822         if ((status = decode_restorefh(&xdr)) != 0)
3823                 goto out;
3824         decode_getfattr(&xdr, res->old_fattr, res->server);
3825 out:
3826         return status;
3827 }
3828
3829 /*
3830  * Decode LINK response
3831  */
3832 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_link_res *res)
3833 {
3834         struct xdr_stream xdr;
3835         struct compound_hdr hdr;
3836         int status;
3837
3838         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3839         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3840                 goto out;
3841         if ((status = decode_putfh(&xdr)) != 0)
3842                 goto out;
3843         if ((status = decode_savefh(&xdr)) != 0)
3844                 goto out;
3845         if ((status = decode_putfh(&xdr)) != 0)
3846                 goto out;
3847         if ((status = decode_link(&xdr, &res->cinfo)) != 0)
3848                 goto out;
3849         /*
3850          * Note order: OP_LINK leaves the directory as the current
3851          *             filehandle.
3852          */
3853         if (decode_getfattr(&xdr, res->dir_attr, res->server) != 0)
3854                 goto out;
3855         if ((status = decode_restorefh(&xdr)) != 0)
3856                 goto out;
3857         decode_getfattr(&xdr, res->fattr, res->server);
3858 out:
3859         return status;
3860 }
3861
3862 /*
3863  * Decode CREATE response
3864  */
3865 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
3866 {
3867         struct xdr_stream xdr;
3868         struct compound_hdr hdr;
3869         int status;
3870
3871         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3872         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3873                 goto out;
3874         if ((status = decode_putfh(&xdr)) != 0)
3875                 goto out;
3876         if ((status = decode_savefh(&xdr)) != 0)
3877                 goto out;
3878         if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
3879                 goto out;
3880         if ((status = decode_getfh(&xdr, res->fh)) != 0)
3881                 goto out;
3882         if (decode_getfattr(&xdr, res->fattr, res->server) != 0)
3883                 goto out;
3884         if ((status = decode_restorefh(&xdr)) != 0)
3885                 goto out;
3886         decode_getfattr(&xdr, res->dir_fattr, res->server);
3887 out:
3888         return status;
3889 }
3890
3891 /*
3892  * Decode SYMLINK response
3893  */
3894 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
3895 {
3896         return nfs4_xdr_dec_create(rqstp, p, res);
3897 }
3898
3899 /*
3900  * Decode GETATTR response
3901  */
3902 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_getattr_res *res)
3903 {
3904         struct xdr_stream xdr;
3905         struct compound_hdr hdr;
3906         int status;
3907
3908         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3909         status = decode_compound_hdr(&xdr, &hdr);
3910         if (status)
3911                 goto out;
3912         status = decode_putfh(&xdr);
3913         if (status)
3914                 goto out;
3915         status = decode_getfattr(&xdr, res->fattr, res->server);
3916 out:
3917         return status;
3918 }
3919
3920 /*
3921  * Encode an SETACL request
3922  */
3923 static int
3924 nfs4_xdr_enc_setacl(struct rpc_rqst *req, __be32 *p, struct nfs_setaclargs *args)
3925 {
3926         struct xdr_stream xdr;
3927         struct compound_hdr hdr = {
3928                 .nops   = 0,
3929         };
3930         int status;
3931
3932         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
3933         encode_compound_hdr(&xdr, &hdr);
3934         encode_putfh(&xdr, args->fh, &hdr);
3935         status = encode_setacl(&xdr, args, &hdr);
3936         encode_nops(&hdr);
3937         return status;
3938 }
3939
3940 /*
3941  * Decode SETACL response
3942  */
3943 static int
3944 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, __be32 *p, void *res)
3945 {
3946         struct xdr_stream xdr;
3947         struct compound_hdr hdr;
3948         int status;
3949
3950         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3951         status = decode_compound_hdr(&xdr, &hdr);
3952         if (status)
3953                 goto out;
3954         status = decode_putfh(&xdr);
3955         if (status)
3956                 goto out;
3957         status = decode_setattr(&xdr, res);
3958 out:
3959         return status;
3960 }
3961
3962 /*
3963  * Decode GETACL response
3964  */
3965 static int
3966 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, __be32 *p, size_t *acl_len)
3967 {
3968         struct xdr_stream xdr;
3969         struct compound_hdr hdr;
3970         int status;
3971
3972         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3973         status = decode_compound_hdr(&xdr, &hdr);
3974         if (status)
3975                 goto out;
3976         status = decode_putfh(&xdr);
3977         if (status)
3978                 goto out;
3979         status = decode_getacl(&xdr, rqstp, acl_len);
3980
3981 out:
3982         return status;
3983 }
3984
3985 /*
3986  * Decode CLOSE response
3987  */
3988 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
3989 {
3990         struct xdr_stream xdr;
3991         struct compound_hdr hdr;
3992         int status;
3993
3994         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3995         status = decode_compound_hdr(&xdr, &hdr);
3996         if (status)
3997                 goto out;
3998         status = decode_putfh(&xdr);
3999         if (status)
4000                 goto out;
4001         status = decode_close(&xdr, res);
4002         if (status != 0)
4003                 goto out;
4004         /*
4005          * Note: Server may do delete on close for this file
4006          *      in which case the getattr call will fail with
4007          *      an ESTALE error. Shouldn't be a problem,
4008          *      though, since fattr->valid will remain unset.
4009          */
4010         decode_getfattr(&xdr, res->fattr, res->server);
4011 out:
4012         return status;
4013 }
4014
4015 /*
4016  * Decode OPEN response
4017  */
4018 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4019 {
4020         struct xdr_stream xdr;
4021         struct compound_hdr hdr;
4022         int status;
4023
4024         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4025         status = decode_compound_hdr(&xdr, &hdr);
4026         if (status)
4027                 goto out;
4028         status = decode_putfh(&xdr);
4029         if (status)
4030                 goto out;
4031         status = decode_savefh(&xdr);
4032         if (status)
4033                 goto out;
4034         status = decode_open(&xdr, res);
4035         if (status)
4036                 goto out;
4037         if (decode_getfh(&xdr, &res->fh) != 0)
4038                 goto out;
4039         if (decode_getfattr(&xdr, res->f_attr, res->server) != 0)
4040                 goto out;
4041         if (decode_restorefh(&xdr) != 0)
4042                 goto out;
4043         decode_getfattr(&xdr, res->dir_attr, res->server);
4044 out:
4045         return status;
4046 }
4047
4048 /*
4049  * Decode OPEN_CONFIRM response
4050  */
4051 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, __be32 *p, struct nfs_open_confirmres *res)
4052 {
4053         struct xdr_stream xdr;
4054         struct compound_hdr hdr;
4055         int status;
4056
4057         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4058         status = decode_compound_hdr(&xdr, &hdr);
4059         if (status)
4060                 goto out;
4061         status = decode_putfh(&xdr);
4062         if (status)
4063                 goto out;
4064         status = decode_open_confirm(&xdr, res);
4065 out:
4066         return status;
4067 }
4068
4069 /*
4070  * Decode OPEN response
4071  */
4072 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4073 {
4074         struct xdr_stream xdr;
4075         struct compound_hdr hdr;
4076         int status;
4077
4078         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4079         status = decode_compound_hdr(&xdr, &hdr);
4080         if (status)
4081                 goto out;
4082         status = decode_putfh(&xdr);
4083         if (status)
4084                 goto out;
4085         status = decode_open(&xdr, res);
4086         if (status)
4087                 goto out;
4088         decode_getfattr(&xdr, res->f_attr, res->server);
4089 out:
4090         return status;
4091 }
4092
4093 /*
4094  * Decode SETATTR response
4095  */
4096 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_setattrres *res)
4097 {
4098         struct xdr_stream xdr;
4099         struct compound_hdr hdr;
4100         int status;
4101
4102         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4103         status = decode_compound_hdr(&xdr, &hdr);
4104         if (status)
4105                 goto out;
4106         status = decode_putfh(&xdr);
4107         if (status)
4108                 goto out;
4109         status = decode_setattr(&xdr, res);
4110         if (status)
4111                 goto out;
4112         decode_getfattr(&xdr, res->fattr, res->server);
4113 out:
4114         return status;
4115 }
4116
4117 /*
4118  * Decode LOCK response
4119  */
4120 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lock_res *res)
4121 {
4122         struct xdr_stream xdr;
4123         struct compound_hdr hdr;
4124         int status;
4125
4126         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4127         status = decode_compound_hdr(&xdr, &hdr);
4128         if (status)
4129                 goto out;
4130         status = decode_putfh(&xdr);
4131         if (status)
4132                 goto out;
4133         status = decode_lock(&xdr, res);
4134 out:
4135         return status;
4136 }
4137
4138 /*
4139  * Decode LOCKT response
4140  */
4141 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lockt_res *res)
4142 {
4143         struct xdr_stream xdr;
4144         struct compound_hdr hdr;
4145         int status;
4146
4147         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4148         status = decode_compound_hdr(&xdr, &hdr);
4149         if (status)
4150                 goto out;
4151         status = decode_putfh(&xdr);
4152         if (status)
4153                 goto out;
4154         status = decode_lockt(&xdr, res);
4155 out:
4156         return status;
4157 }
4158
4159 /*
4160  * Decode LOCKU response
4161  */
4162 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, __be32 *p, struct nfs_locku_res *res)
4163 {
4164         struct xdr_stream xdr;
4165         struct compound_hdr hdr;
4166         int status;
4167
4168         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4169         status = decode_compound_hdr(&xdr, &hdr);
4170         if (status)
4171                 goto out;
4172         status = decode_putfh(&xdr);
4173         if (status)
4174                 goto out;
4175         status = decode_locku(&xdr, res);
4176 out:
4177         return status;
4178 }
4179
4180 /*
4181  * Decode READLINK response
4182  */
4183 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, __be32 *p, void *res)
4184 {
4185         struct xdr_stream xdr;
4186         struct compound_hdr hdr;
4187         int status;
4188
4189         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4190         status = decode_compound_hdr(&xdr, &hdr);
4191         if (status)
4192                 goto out;
4193         status = decode_putfh(&xdr);
4194         if (status)
4195                 goto out;
4196         status = decode_readlink(&xdr, rqstp);
4197 out:
4198         return status;
4199 }
4200
4201 /*
4202  * Decode READDIR response
4203  */
4204 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_readdir_res *res)
4205 {
4206         struct xdr_stream xdr;
4207         struct compound_hdr hdr;
4208         int status;
4209
4210         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4211         status = decode_compound_hdr(&xdr, &hdr);
4212         if (status)
4213                 goto out;
4214         status = decode_putfh(&xdr);
4215         if (status)
4216                 goto out;
4217         status = decode_readdir(&xdr, rqstp, res);
4218 out:
4219         return status;
4220 }
4221
4222 /*
4223  * Decode Read response
4224  */
4225 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, __be32 *p, struct nfs_readres *res)
4226 {
4227         struct xdr_stream xdr;
4228         struct compound_hdr hdr;
4229         int status;
4230
4231         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4232         status = decode_compound_hdr(&xdr, &hdr);
4233         if (status)
4234                 goto out;
4235         status = decode_putfh(&xdr);
4236         if (status)
4237                 goto out;
4238         status = decode_read(&xdr, rqstp, res);
4239         if (!status)
4240                 status = res->count;
4241 out:
4242         return status;
4243 }
4244
4245 /*
4246  * Decode WRITE response
4247  */
4248 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *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_putfh(&xdr);
4259         if (status)
4260                 goto out;
4261         status = decode_write(&xdr, res);
4262         if (status)
4263                 goto out;
4264         decode_getfattr(&xdr, res->fattr, res->server);
4265         if (!status)
4266                 status = res->count;
4267 out:
4268         return status;
4269 }
4270
4271 /*
4272  * Decode COMMIT response
4273  */
4274 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
4275 {
4276         struct xdr_stream xdr;
4277         struct compound_hdr hdr;
4278         int status;
4279
4280         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4281         status = decode_compound_hdr(&xdr, &hdr);
4282         if (status)
4283                 goto out;
4284         status = decode_putfh(&xdr);
4285         if (status)
4286                 goto out;
4287         status = decode_commit(&xdr, res);
4288         if (status)
4289                 goto out;
4290         decode_getfattr(&xdr, res->fattr, res->server);
4291 out:
4292         return status;
4293 }
4294
4295 /*
4296  * FSINFO request
4297  */
4298 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
4299 {
4300         struct xdr_stream xdr;
4301         struct compound_hdr hdr;
4302         int status;
4303
4304         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4305         status = decode_compound_hdr(&xdr, &hdr);
4306         if (!status)
4307                 status = decode_putfh(&xdr);
4308         if (!status)
4309                 status = decode_fsinfo(&xdr, fsinfo);
4310         return status;
4311 }
4312
4313 /*
4314  * PATHCONF request
4315  */
4316 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, __be32 *p, struct nfs_pathconf *pathconf)
4317 {
4318         struct xdr_stream xdr;
4319         struct compound_hdr hdr;
4320         int status;
4321
4322         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4323         status = decode_compound_hdr(&xdr, &hdr);
4324         if (!status)
4325                 status = decode_putfh(&xdr);
4326         if (!status)
4327                 status = decode_pathconf(&xdr, pathconf);
4328         return status;
4329 }
4330
4331 /*
4332  * STATFS request
4333  */
4334 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, __be32 *p, struct nfs_fsstat *fsstat)
4335 {
4336         struct xdr_stream xdr;
4337         struct compound_hdr hdr;
4338         int status;
4339
4340         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4341         status = decode_compound_hdr(&xdr, &hdr);
4342         if (!status)
4343                 status = decode_putfh(&xdr);
4344         if (!status)
4345                 status = decode_statfs(&xdr, fsstat);
4346         return status;
4347 }
4348
4349 /*
4350  * GETATTR_BITMAP request
4351  */
4352 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, __be32 *p, struct nfs4_server_caps_res *res)
4353 {
4354         struct xdr_stream xdr;
4355         struct compound_hdr hdr;
4356         int status;
4357
4358         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4359         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
4360                 goto out;
4361         if ((status = decode_putfh(&xdr)) != 0)
4362                 goto out;
4363         status = decode_server_caps(&xdr, res);
4364 out:
4365         return status;
4366 }
4367
4368 /*
4369  * Decode RENEW response
4370  */
4371 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, __be32 *p, void *dummy)
4372 {
4373         struct xdr_stream xdr;
4374         struct compound_hdr hdr;
4375         int status;
4376
4377         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4378         status = decode_compound_hdr(&xdr, &hdr);
4379         if (!status)
4380                 status = decode_renew(&xdr);
4381         return status;
4382 }
4383
4384 /*
4385  * a SETCLIENTID request
4386  */
4387 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, __be32 *p,
4388                 struct nfs_client *clp)
4389 {
4390         struct xdr_stream xdr;
4391         struct compound_hdr hdr;
4392         int status;
4393
4394         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4395         status = decode_compound_hdr(&xdr, &hdr);
4396         if (!status)
4397                 status = decode_setclientid(&xdr, clp);
4398         return status;
4399 }
4400
4401 /*
4402  * a SETCLIENTID_CONFIRM request
4403  */
4404 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
4405 {
4406         struct xdr_stream xdr;
4407         struct compound_hdr hdr;
4408         int status;
4409
4410         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4411         status = decode_compound_hdr(&xdr, &hdr);
4412         if (!status)
4413                 status = decode_setclientid_confirm(&xdr);
4414         if (!status)
4415                 status = decode_putrootfh(&xdr);
4416         if (!status)
4417                 status = decode_fsinfo(&xdr, fsinfo);
4418         return status;
4419 }
4420
4421 /*
4422  * DELEGRETURN request
4423  */
4424 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_delegreturnres *res)
4425 {
4426         struct xdr_stream xdr;
4427         struct compound_hdr hdr;
4428         int status;
4429
4430         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4431         status = decode_compound_hdr(&xdr, &hdr);
4432         if (status != 0)
4433                 goto out;
4434         status = decode_putfh(&xdr);
4435         if (status != 0)
4436                 goto out;
4437         status = decode_delegreturn(&xdr);
4438         decode_getfattr(&xdr, res->fattr, res->server);
4439 out:
4440         return status;
4441 }
4442
4443 /*
4444  * FS_LOCATIONS request
4445  */
4446 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations *res)
4447 {
4448         struct xdr_stream xdr;
4449         struct compound_hdr hdr;
4450         int status;
4451
4452         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4453         status = decode_compound_hdr(&xdr, &hdr);
4454         if (status != 0)
4455                 goto out;
4456         if ((status = decode_putfh(&xdr)) != 0)
4457                 goto out;
4458         if ((status = decode_lookup(&xdr)) != 0)
4459                 goto out;
4460         xdr_enter_page(&xdr, PAGE_SIZE);
4461         status = decode_getfattr(&xdr, &res->fattr, res->server);
4462 out:
4463         return status;
4464 }
4465
4466 __be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus)
4467 {
4468         uint32_t bitmap[2] = {0};
4469         uint32_t len;
4470
4471         if (!*p++) {
4472                 if (!*p)
4473                         return ERR_PTR(-EAGAIN);
4474                 entry->eof = 1;
4475                 return ERR_PTR(-EBADCOOKIE);
4476         }
4477
4478         entry->prev_cookie = entry->cookie;
4479         p = xdr_decode_hyper(p, &entry->cookie);
4480         entry->len = ntohl(*p++);
4481         entry->name = (const char *) p;
4482         p += XDR_QUADLEN(entry->len);
4483
4484         /*
4485          * In case the server doesn't return an inode number,
4486          * we fake one here.  (We don't use inode number 0,
4487          * since glibc seems to choke on it...)
4488          */
4489         entry->ino = 1;
4490
4491         len = ntohl(*p++);              /* bitmap length */
4492         if (len-- > 0) {
4493                 bitmap[0] = ntohl(*p++);
4494                 if (len-- > 0) {
4495                         bitmap[1] = ntohl(*p++);
4496                         p += len;
4497                 }
4498         }
4499         len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */
4500         if (len > 0) {
4501                 if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) {
4502                         bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
4503                         /* Ignore the return value of rdattr_error for now */
4504                         p++;
4505                         len--;
4506                 }
4507                 if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
4508                         xdr_decode_hyper(p, &entry->ino);
4509                 else if (bitmap[0] == FATTR4_WORD0_FILEID)
4510                         xdr_decode_hyper(p, &entry->ino);
4511                 p += len;
4512         }
4513
4514         entry->eof = !p[0] && p[1];
4515         return p;
4516 }
4517
4518 /*
4519  * We need to translate between nfs status return values and
4520  * the local errno values which may not be the same.
4521  */
4522 static struct {
4523         int stat;
4524         int errno;
4525 } nfs_errtbl[] = {
4526         { NFS4_OK,              0               },
4527         { NFS4ERR_PERM,         -EPERM          },
4528         { NFS4ERR_NOENT,        -ENOENT         },
4529         { NFS4ERR_IO,           -errno_NFSERR_IO},
4530         { NFS4ERR_NXIO,         -ENXIO          },
4531         { NFS4ERR_ACCESS,       -EACCES         },
4532         { NFS4ERR_EXIST,        -EEXIST         },
4533         { NFS4ERR_XDEV,         -EXDEV          },
4534         { NFS4ERR_NOTDIR,       -ENOTDIR        },
4535         { NFS4ERR_ISDIR,        -EISDIR         },
4536         { NFS4ERR_INVAL,        -EINVAL         },
4537         { NFS4ERR_FBIG,         -EFBIG          },
4538         { NFS4ERR_NOSPC,        -ENOSPC         },
4539         { NFS4ERR_ROFS,         -EROFS          },
4540         { NFS4ERR_MLINK,        -EMLINK         },
4541         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
4542         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
4543         { NFS4ERR_DQUOT,        -EDQUOT         },
4544         { NFS4ERR_STALE,        -ESTALE         },
4545         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
4546         { NFS4ERR_BADOWNER,     -EINVAL         },
4547         { NFS4ERR_BADNAME,      -EINVAL         },
4548         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
4549         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
4550         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
4551         { NFS4ERR_SERVERFAULT,  -ESERVERFAULT   },
4552         { NFS4ERR_BADTYPE,      -EBADTYPE       },
4553         { NFS4ERR_LOCKED,       -EAGAIN         },
4554         { NFS4ERR_RESOURCE,     -EREMOTEIO      },
4555         { NFS4ERR_SYMLINK,      -ELOOP          },
4556         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
4557         { NFS4ERR_DEADLOCK,     -EDEADLK        },
4558         { NFS4ERR_WRONGSEC,     -EPERM          }, /* FIXME: this needs
4559                                                     * to be handled by a
4560                                                     * middle-layer.
4561                                                     */
4562         { -1,                   -EIO            }
4563 };
4564
4565 /*
4566  * Convert an NFS error code to a local one.
4567  * This one is used jointly by NFSv2 and NFSv3.
4568  */
4569 static int
4570 nfs4_stat_to_errno(int stat)
4571 {
4572         int i;
4573         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
4574                 if (nfs_errtbl[i].stat == stat)
4575                         return nfs_errtbl[i].errno;
4576         }
4577         if (stat <= 10000 || stat > 10100) {
4578                 /* The server is looney tunes. */
4579                 return -ESERVERFAULT;
4580         }
4581         /* If we cannot translate the error, the recovery routines should
4582          * handle it.
4583          * Note: remaining NFSv4 error codes have values > 10000, so should
4584          * not conflict with native Linux error codes.
4585          */
4586         return -stat;
4587 }
4588
4589 #define PROC(proc, argtype, restype)                            \
4590 [NFSPROC4_CLNT_##proc] = {                                      \
4591         .p_proc   = NFSPROC4_COMPOUND,                          \
4592         .p_encode = (kxdrproc_t) nfs4_xdr_##argtype,            \
4593         .p_decode = (kxdrproc_t) nfs4_xdr_##restype,            \
4594         .p_arglen = NFS4_##argtype##_sz,                        \
4595         .p_replen = NFS4_##restype##_sz,                        \
4596         .p_statidx = NFSPROC4_CLNT_##proc,                      \
4597         .p_name   = #proc,                                      \
4598 }
4599
4600 struct rpc_procinfo     nfs4_procedures[] = {
4601   PROC(READ,            enc_read,       dec_read),
4602   PROC(WRITE,           enc_write,      dec_write),
4603   PROC(COMMIT,          enc_commit,     dec_commit),
4604   PROC(OPEN,            enc_open,       dec_open),
4605   PROC(OPEN_CONFIRM,    enc_open_confirm,       dec_open_confirm),
4606   PROC(OPEN_NOATTR,     enc_open_noattr,        dec_open_noattr),
4607   PROC(OPEN_DOWNGRADE,  enc_open_downgrade,     dec_open_downgrade),
4608   PROC(CLOSE,           enc_close,      dec_close),
4609   PROC(SETATTR,         enc_setattr,    dec_setattr),
4610   PROC(FSINFO,          enc_fsinfo,     dec_fsinfo),
4611   PROC(RENEW,           enc_renew,      dec_renew),
4612   PROC(SETCLIENTID,     enc_setclientid,        dec_setclientid),
4613   PROC(SETCLIENTID_CONFIRM,     enc_setclientid_confirm,        dec_setclientid_confirm),
4614   PROC(LOCK,            enc_lock,       dec_lock),
4615   PROC(LOCKT,           enc_lockt,      dec_lockt),
4616   PROC(LOCKU,           enc_locku,      dec_locku),
4617   PROC(ACCESS,          enc_access,     dec_access),
4618   PROC(GETATTR,         enc_getattr,    dec_getattr),
4619   PROC(LOOKUP,          enc_lookup,     dec_lookup),
4620   PROC(LOOKUP_ROOT,     enc_lookup_root,        dec_lookup_root),
4621   PROC(REMOVE,          enc_remove,     dec_remove),
4622   PROC(RENAME,          enc_rename,     dec_rename),
4623   PROC(LINK,            enc_link,       dec_link),
4624   PROC(SYMLINK,         enc_symlink,    dec_symlink),
4625   PROC(CREATE,          enc_create,     dec_create),
4626   PROC(PATHCONF,        enc_pathconf,   dec_pathconf),
4627   PROC(STATFS,          enc_statfs,     dec_statfs),
4628   PROC(READLINK,        enc_readlink,   dec_readlink),
4629   PROC(READDIR,         enc_readdir,    dec_readdir),
4630   PROC(SERVER_CAPS,     enc_server_caps, dec_server_caps),
4631   PROC(DELEGRETURN,     enc_delegreturn, dec_delegreturn),
4632   PROC(GETACL,          enc_getacl,     dec_getacl),
4633   PROC(SETACL,          enc_setacl,     dec_setacl),
4634   PROC(FS_LOCATIONS,    enc_fs_locations, dec_fs_locations),
4635 };
4636
4637 struct rpc_version              nfs_version4 = {
4638         .number                 = 4,
4639         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
4640         .procs                  = nfs4_procedures
4641 };
4642
4643 /*
4644  * Local variables:
4645  *  c-basic-offset: 8
4646  * End:
4647  */