git.oblomov.eu Git - 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 1 (u32) out of (NFS4_OPAQUE_LIMIT  >> 2)
  72  */
  73 #define owner_id_maxsz          (1 + 1)
  74 #define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  75 #define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  76 #define op_encode_hdr_maxsz     (1)
  77 #define op_decode_hdr_maxsz     (2)
  78 #define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
  79                                 (NFS4_FHSIZE >> 2))
  80 #define decode_putfh_maxsz      (op_decode_hdr_maxsz)
  81 #define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
  82 #define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
  83 #define encode_getfh_maxsz      (op_encode_hdr_maxsz)
  84 #define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
  85                                 ((3+NFS4_FHSIZE) >> 2))
  86 #define nfs4_fattr_bitmap_maxsz 3
  87 #define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
  88 #define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
  89 #define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
  90 /* This is based on getfattr, which uses the most attributes: */
  91 #define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
  92                                 3 + 3 + 3 + 2 * nfs4_name_maxsz))
  93 #define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
  94                                 nfs4_fattr_value_maxsz)
  95 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
  96 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
  97 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
  98 #define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
  99 #define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 100 #define encode_fsinfo_maxsz     (op_encode_hdr_maxsz + 2)
 101 #define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + 11)
 102 #define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 103 #define decode_renew_maxsz      (op_decode_hdr_maxsz)
 104 #define encode_setclientid_maxsz \
 105                                 (op_encode_hdr_maxsz + \
 106                                 4 /*server->ip_addr*/ + \
 107                                 1 /*Netid*/ + \
 108                                 6 /*uaddr*/ + \
 109                                 6 + (NFS4_VERIFIER_SIZE >> 2))
 110 #define decode_setclientid_maxsz \
 111                                 (op_decode_hdr_maxsz + \
 112                                 2 + \
 113                                 1024) /* large value for CLID_INUSE */
 114 #define encode_setclientid_confirm_maxsz \
 115                                 (op_encode_hdr_maxsz + \
 116                                 3 + (NFS4_VERIFIER_SIZE >> 2))
 117 #define decode_setclientid_confirm_maxsz \
 118                                 (op_decode_hdr_maxsz)
 119 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + \
 120                                 1 + ((3 + NFS4_FHSIZE) >> 2))
 121 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 122                                 nfs4_name_maxsz)
 123 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 124                                 2 * nfs4_name_maxsz)
 125 #define decode_rename_maxsz     (op_decode_hdr_maxsz + 5 + 5)
 126 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 127                                 nfs4_name_maxsz)
 128 #define decode_link_maxsz       (op_decode_hdr_maxsz + 5)
 129 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 130                                 1 + nfs4_name_maxsz + \
 131                                 1 + \
 132                                 nfs4_fattr_maxsz)
 133 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 134 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 135                                 2 + nfs4_name_maxsz + \
 136                                 nfs4_fattr_maxsz)
 137 #define decode_create_maxsz     (op_decode_hdr_maxsz + 8)
 138 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 139 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 140 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 141 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 142 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 143                                 encode_putfh_maxsz + \
 144                                 op_encode_hdr_maxsz + 7)
 145 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 146                                 decode_putfh_maxsz + \
 147                                 op_decode_hdr_maxsz + 2)
 148 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 149                                 encode_putfh_maxsz + \
 150                                 op_encode_hdr_maxsz)
 151 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 152                                 decode_putfh_maxsz + \
 153                                 op_decode_hdr_maxsz)
 154 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 155                                 encode_putfh_maxsz + \
 156                                 op_encode_hdr_maxsz + 9)
 157 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 158                                 decode_putfh_maxsz + \
 159                                 op_decode_hdr_maxsz + 2)
 160 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 161                                 encode_putfh_maxsz + \
 162                                 op_encode_hdr_maxsz + 8 + \
 163                                 encode_getattr_maxsz)
 164 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 165                                 decode_putfh_maxsz + \
 166                                 op_decode_hdr_maxsz + 4 + \
 167                                 decode_getattr_maxsz)
 168 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 169                                 encode_putfh_maxsz + \
 170                                 op_encode_hdr_maxsz + 3 + \
 171                                 encode_getattr_maxsz)
 172 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 173                                 decode_putfh_maxsz + \
 174                                 op_decode_hdr_maxsz + 2 + \
 175                                 decode_getattr_maxsz)
 176 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 177                                 encode_putfh_maxsz + \
 178                                 op_encode_hdr_maxsz + \
 179                                 13 + 3 + 2 + 64 + \
 180                                 encode_getattr_maxsz + \
 181                                 encode_getfh_maxsz)
 182 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 183                                 decode_putfh_maxsz + \
 184                                 op_decode_hdr_maxsz + 4 + 5 + 2 + 3 + \
 185                                 decode_getattr_maxsz + \
 186                                 decode_getfh_maxsz)
 187 #define NFS4_enc_open_confirm_sz      \
 188                                 (compound_encode_hdr_maxsz + \
 189                                 encode_putfh_maxsz + \
 190                                 op_encode_hdr_maxsz + 5)
 191 #define NFS4_dec_open_confirm_sz        (compound_decode_hdr_maxsz + \
 192                                         decode_putfh_maxsz + \
 193                                         op_decode_hdr_maxsz + 4)
 194 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 195                                         encode_putfh_maxsz + \
 196                                         op_encode_hdr_maxsz + \
 197                                         11)
 198 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 199                                         decode_putfh_maxsz + \
 200                                         op_decode_hdr_maxsz + \
 201                                         4 + 5 + 2 + 3)
 202 #define NFS4_enc_open_downgrade_sz \
 203                                 (compound_encode_hdr_maxsz + \
 204                                 encode_putfh_maxsz + \
 205                                 op_encode_hdr_maxsz + 7 + \
 206                                 encode_getattr_maxsz)
 207 #define NFS4_dec_open_downgrade_sz \
 208                                 (compound_decode_hdr_maxsz + \
 209                                 decode_putfh_maxsz + \
 210                                 op_decode_hdr_maxsz + 4 + \
 211                                 decode_getattr_maxsz)
 212 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 213                                 encode_putfh_maxsz + \
 214                                 op_encode_hdr_maxsz + 5 + \
 215                                 encode_getattr_maxsz)
 216 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 217                                 decode_putfh_maxsz + \
 218                                 op_decode_hdr_maxsz + 4 + \
 219                                 decode_getattr_maxsz)
 220 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 221                                 encode_putfh_maxsz + \
 222                                 op_encode_hdr_maxsz + 4 + \
 223                                 nfs4_fattr_maxsz + \
 224                                 encode_getattr_maxsz)
 225 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 226                                 decode_putfh_maxsz + \
 227                                 op_decode_hdr_maxsz + 3)
 228 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 229                                 encode_putfh_maxsz + \
 230                                 encode_fsinfo_maxsz)
 231 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 232                                 decode_putfh_maxsz + \
 233                                 decode_fsinfo_maxsz)
 234 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 235                                 encode_renew_maxsz)
 236 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 237                                 decode_renew_maxsz)
 238 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 239                                 encode_setclientid_maxsz)
 240 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 241                                 decode_setclientid_maxsz)
 242 #define NFS4_enc_setclientid_confirm_sz \
 243                                 (compound_encode_hdr_maxsz + \
 244                                 encode_setclientid_confirm_maxsz + \
 245                                 encode_putrootfh_maxsz + \
 246                                 encode_fsinfo_maxsz)
 247 #define NFS4_dec_setclientid_confirm_sz \
 248                                 (compound_decode_hdr_maxsz + \
 249                                 decode_setclientid_confirm_maxsz + \
 250                                 decode_putrootfh_maxsz + \
 251                                 decode_fsinfo_maxsz)
 252 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 253                                 encode_putfh_maxsz + \
 254                                 encode_getattr_maxsz + \
 255                                 op_encode_hdr_maxsz + \
 256                                 1 + 1 + 2 + 2 + \
 257                                 1 + 4 + 1 + 2 + \
 258                                 owner_id_maxsz)
 259 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 260                                 decode_putfh_maxsz + \
 261                                 decode_getattr_maxsz + \
 262                                 op_decode_hdr_maxsz + \
 263                                 2 + 2 + 1 + 2 + \
 264                                 owner_id_maxsz)
 265 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 266                                 encode_putfh_maxsz + \
 267                                 encode_getattr_maxsz + \
 268                                 op_encode_hdr_maxsz + \
 269                                 1 + 2 + 2 + 2 + \
 270                                 owner_id_maxsz)
 271 #define NFS4_dec_lockt_sz       (NFS4_dec_lock_sz)
 272 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 273                                 encode_putfh_maxsz + \
 274                                 encode_getattr_maxsz + \
 275                                 op_encode_hdr_maxsz + \
 276                                 1 + 1 + 4 + 2 + 2)
 277 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 278                                 decode_putfh_maxsz + \
 279                                 decode_getattr_maxsz + \
 280                                 op_decode_hdr_maxsz + 4)
 281 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 282                                 encode_putfh_maxsz + \
 283                                 op_encode_hdr_maxsz + 1)
 284 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 285                                 decode_putfh_maxsz + \
 286                                 op_decode_hdr_maxsz + 2)
 287 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 288                                 encode_putfh_maxsz + \
 289                                 encode_getattr_maxsz)
 290 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 291                                 decode_putfh_maxsz + \
 292                                 decode_getattr_maxsz)
 293 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 294                                 encode_putfh_maxsz + \
 295                                 encode_lookup_maxsz + \
 296                                 encode_getattr_maxsz + \
 297                                 encode_getfh_maxsz)
 298 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 299                                 decode_putfh_maxsz + \
 300                                 op_decode_hdr_maxsz + \
 301                                 decode_getattr_maxsz + \
 302                                 decode_getfh_maxsz)
 303 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 304                                 encode_putrootfh_maxsz + \
 305                                 encode_getattr_maxsz + \
 306                                 encode_getfh_maxsz)
 307 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 308                                 decode_putrootfh_maxsz + \
 309                                 decode_getattr_maxsz + \
 310                                 decode_getfh_maxsz)
 311 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 312                                 encode_putfh_maxsz + \
 313                                 encode_remove_maxsz + \
 314                                 encode_getattr_maxsz)
 315 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 316                                 decode_putfh_maxsz + \
 317                                 op_decode_hdr_maxsz + 5 + \
 318                                 decode_getattr_maxsz)
 319 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 320                                 encode_putfh_maxsz + \
 321                                 encode_savefh_maxsz + \
 322                                 encode_putfh_maxsz + \
 323                                 encode_rename_maxsz + \
 324                                 encode_getattr_maxsz + \
 325                                 encode_restorefh_maxsz + \
 326                                 encode_getattr_maxsz)
 327 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 328                                 decode_putfh_maxsz + \
 329                                 decode_savefh_maxsz + \
 330                                 decode_putfh_maxsz + \
 331                                 decode_rename_maxsz + \
 332                                 decode_getattr_maxsz + \
 333                                 decode_restorefh_maxsz + \
 334                                 decode_getattr_maxsz)
 335 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 336                                 encode_putfh_maxsz + \
 337                                 encode_savefh_maxsz + \
 338                                 encode_putfh_maxsz + \
 339                                 encode_link_maxsz + \
 340                                 decode_getattr_maxsz + \
 341                                 encode_restorefh_maxsz + \
 342                                 decode_getattr_maxsz)
 343 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 344                                 decode_putfh_maxsz + \
 345                                 decode_savefh_maxsz + \
 346                                 decode_putfh_maxsz + \
 347                                 decode_link_maxsz + \
 348                                 decode_getattr_maxsz + \
 349                                 decode_restorefh_maxsz + \
 350                                 decode_getattr_maxsz)
 351 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 352                                 encode_putfh_maxsz + \
 353                                 encode_symlink_maxsz + \
 354                                 encode_getattr_maxsz + \
 355                                 encode_getfh_maxsz)
 356 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 357                                 decode_putfh_maxsz + \
 358                                 decode_symlink_maxsz + \
 359                                 decode_getattr_maxsz + \
 360                                 decode_getfh_maxsz)
 361 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 362                                 encode_putfh_maxsz + \
 363                                 encode_savefh_maxsz + \
 364                                 encode_create_maxsz + \
 365                                 encode_getfh_maxsz + \
 366                                 encode_getattr_maxsz + \
 367                                 encode_restorefh_maxsz + \
 368                                 encode_getattr_maxsz)
 369 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 370                                 decode_putfh_maxsz + \
 371                                 decode_savefh_maxsz + \
 372                                 decode_create_maxsz + \
 373                                 decode_getfh_maxsz + \
 374                                 decode_getattr_maxsz + \
 375                                 decode_restorefh_maxsz + \
 376                                 decode_getattr_maxsz)
 377 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 378                                 encode_putfh_maxsz + \
 379                                 encode_getattr_maxsz)
 380 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 381                                 decode_putfh_maxsz + \
 382                                 decode_getattr_maxsz)
 383 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 384                                 encode_putfh_maxsz + \
 385                                 encode_getattr_maxsz)
 386 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 387                                 decode_putfh_maxsz + \
 388                                 op_decode_hdr_maxsz + 12)
 389 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 390                                 encode_getattr_maxsz)
 391 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 392                                 decode_getattr_maxsz)
 393 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 394                                 encode_putfh_maxsz + \
 395                                 encode_delegreturn_maxsz + \
 396                                 encode_getattr_maxsz)
 397 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 398                                 decode_delegreturn_maxsz + \
 399                                 decode_getattr_maxsz)
 400 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 401                                 encode_putfh_maxsz + \
 402                                 encode_getattr_maxsz)
 403 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 404                                 decode_putfh_maxsz + \
 405                                 op_decode_hdr_maxsz + \
 406                                 nfs4_fattr_bitmap_maxsz + 1)
 407 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 408                                 encode_putfh_maxsz + \
 409                                 op_encode_hdr_maxsz + 4 + \
 410                                 nfs4_fattr_bitmap_maxsz + 1)
 411 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 412                                 decode_putfh_maxsz + \
 413                                 op_decode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
 414 #define NFS4_enc_fs_locations_sz \
 415                                 (compound_encode_hdr_maxsz + \
 416                                  encode_putfh_maxsz + \
 417                                  encode_getattr_maxsz)
 418 #define NFS4_dec_fs_locations_sz \
 419                                 (compound_decode_hdr_maxsz + \
 420                                  decode_putfh_maxsz + \
 421                                  op_decode_hdr_maxsz + \
 422                                  nfs4_fattr_bitmap_maxsz)
 423
 424 static struct {
 425         unsigned int    mode;
 426         unsigned int    nfs2type;
 427 } nfs_type2fmt[] = {
 428         { 0,            NFNON        },
 429         { S_IFREG,      NFREG        },
 430         { S_IFDIR,      NFDIR        },
 431         { S_IFBLK,      NFBLK        },
 432         { S_IFCHR,      NFCHR        },
 433         { S_IFLNK,      NFLNK        },
 434         { S_IFSOCK,     NFSOCK       },
 435         { S_IFIFO,      NFFIFO       },
 436         { 0,            NFNON        },
 437         { 0,            NFNON        },
 438 };
 439
 440 struct compound_hdr {
 441         int32_t         status;
 442         uint32_t        nops;
 443         uint32_t        taglen;
 444         char *          tag;
 445 };
 446
 447 /*
 448  * START OF "GENERIC" ENCODE ROUTINES.
 449  *   These may look a little ugly since they are imported from a "generic"
 450  * set of XDR encode/decode routines which are intended to be shared by
 451  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
 452  *
 453  * If the pain of reading these is too great, it should be a straightforward
 454  * task to translate them into Linux-specific versions which are more
 455  * consistent with the style used in NFSv2/v3...
 456  */
 457 #define WRITE32(n)               *p++ = htonl(n)
 458 #define WRITE64(n)               do {                           \
 459         *p++ = htonl((uint32_t)((n) >> 32));                            \
 460         *p++ = htonl((uint32_t)(n));                                    \
 461 } while (0)
 462 #define WRITEMEM(ptr,nbytes)     do {                           \
 463         p = xdr_encode_opaque_fixed(p, ptr, nbytes);            \
 464 } while (0)
 465
 466 #define RESERVE_SPACE(nbytes)   do {                            \
 467         p = xdr_reserve_space(xdr, nbytes);                     \
 468         if (!p) printk("RESERVE_SPACE(%d) failed in function %s\n", (int) (nbytes), __FUNCTION__); \
 469         BUG_ON(!p);                                             \
 470 } while (0)
 471
 472 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 473 {
 474         __be32 *p;
 475
 476         p = xdr_reserve_space(xdr, 4 + len);
 477         BUG_ON(p == NULL);
 478         xdr_encode_opaque(p, str, len);
 479 }
 480
 481 static int encode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
 482 {
 483         __be32 *p;
 484
 485         dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
 486         BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
 487         RESERVE_SPACE(12+(XDR_QUADLEN(hdr->taglen)<<2));
 488         WRITE32(hdr->taglen);
 489         WRITEMEM(hdr->tag, hdr->taglen);
 490         WRITE32(NFS4_MINOR_VERSION);
 491         WRITE32(hdr->nops);
 492         return 0;
 493 }
 494
 495 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 496 {
 497         __be32 *p;
 498
 499         p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
 500         BUG_ON(p == NULL);
 501         xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
 502 }
 503
 504 static int encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
 505 {
 506         char owner_name[IDMAP_NAMESZ];
 507         char owner_group[IDMAP_NAMESZ];
 508         int owner_namelen = 0;
 509         int owner_grouplen = 0;
 510         __be32 *p;
 511         __be32 *q;
 512         int len;
 513         uint32_t bmval0 = 0;
 514         uint32_t bmval1 = 0;
 515         int status;
 516
 517         /*
 518          * We reserve enough space to write the entire attribute buffer at once.
 519          * In the worst-case, this would be
 520          *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
 521          *          = 36 bytes, plus any contribution from variable-length fields
 522          *            such as owner/group.
 523          */
 524         len = 16;
 525
 526         /* Sigh */
 527         if (iap->ia_valid & ATTR_SIZE)
 528                 len += 8;
 529         if (iap->ia_valid & ATTR_MODE)
 530                 len += 4;
 531         if (iap->ia_valid & ATTR_UID) {
 532                 owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name);
 533                 if (owner_namelen < 0) {
 534                         printk(KERN_WARNING "nfs: couldn't resolve uid %d to string\n",
 535                                iap->ia_uid);
 536                         /* XXX */
 537                         strcpy(owner_name, "nobody");
 538                         owner_namelen = sizeof("nobody") - 1;
 539                         /* goto out; */
 540                 }
 541                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
 542         }
 543         if (iap->ia_valid & ATTR_GID) {
 544                 owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group);
 545                 if (owner_grouplen < 0) {
 546                         printk(KERN_WARNING "nfs4: couldn't resolve gid %d to string\n",
 547                                iap->ia_gid);
 548                         strcpy(owner_group, "nobody");
 549                         owner_grouplen = sizeof("nobody") - 1;
 550                         /* goto out; */
 551                 }
 552                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
 553         }
 554         if (iap->ia_valid & ATTR_ATIME_SET)
 555                 len += 16;
 556         else if (iap->ia_valid & ATTR_ATIME)
 557                 len += 4;
 558         if (iap->ia_valid & ATTR_MTIME_SET)
 559                 len += 16;
 560         else if (iap->ia_valid & ATTR_MTIME)
 561                 len += 4;
 562         RESERVE_SPACE(len);
 563
 564         /*
 565          * We write the bitmap length now, but leave the bitmap and the attribute
 566          * buffer length to be backfilled at the end of this routine.
 567          */
 568         WRITE32(2);
 569         q = p;
 570         p += 3;
 571
 572         if (iap->ia_valid & ATTR_SIZE) {
 573                 bmval0 |= FATTR4_WORD0_SIZE;
 574                 WRITE64(iap->ia_size);
 575         }
 576         if (iap->ia_valid & ATTR_MODE) {
 577                 bmval1 |= FATTR4_WORD1_MODE;
 578                 WRITE32(iap->ia_mode & S_IALLUGO);
 579         }
 580         if (iap->ia_valid & ATTR_UID) {
 581                 bmval1 |= FATTR4_WORD1_OWNER;
 582                 WRITE32(owner_namelen);
 583                 WRITEMEM(owner_name, owner_namelen);
 584         }
 585         if (iap->ia_valid & ATTR_GID) {
 586                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
 587                 WRITE32(owner_grouplen);
 588                 WRITEMEM(owner_group, owner_grouplen);
 589         }
 590         if (iap->ia_valid & ATTR_ATIME_SET) {
 591                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 592                 WRITE32(NFS4_SET_TO_CLIENT_TIME);
 593                 WRITE32(0);
 594                 WRITE32(iap->ia_mtime.tv_sec);
 595                 WRITE32(iap->ia_mtime.tv_nsec);
 596         }
 597         else if (iap->ia_valid & ATTR_ATIME) {
 598                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 599                 WRITE32(NFS4_SET_TO_SERVER_TIME);
 600         }
 601         if (iap->ia_valid & ATTR_MTIME_SET) {
 602                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 603                 WRITE32(NFS4_SET_TO_CLIENT_TIME);
 604                 WRITE32(0);
 605                 WRITE32(iap->ia_mtime.tv_sec);
 606                 WRITE32(iap->ia_mtime.tv_nsec);
 607         }
 608         else if (iap->ia_valid & ATTR_MTIME) {
 609                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 610                 WRITE32(NFS4_SET_TO_SERVER_TIME);
 611         }
 612
 613         /*
 614          * Now we backfill the bitmap and the attribute buffer length.
 615          */
 616         if (len != ((char *)p - (char *)q) + 4) {
 617                 printk ("encode_attr: Attr length calculation error! %u != %Zu\n",
 618                                 len, ((char *)p - (char *)q) + 4);
 619                 BUG();
 620         }
 621         len = (char *)p - (char *)q - 12;
 622         *q++ = htonl(bmval0);
 623         *q++ = htonl(bmval1);
 624         *q++ = htonl(len);
 625
 626         status = 0;
 627 /* out: */
 628         return status;
 629 }
 630
 631 static int encode_access(struct xdr_stream *xdr, u32 access)
 632 {
 633         __be32 *p;
 634
 635         RESERVE_SPACE(8);
 636         WRITE32(OP_ACCESS);
 637         WRITE32(access);
 638
 639         return 0;
 640 }
 641
 642 static int encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg)
 643 {
 644         __be32 *p;
 645
 646         RESERVE_SPACE(8+sizeof(arg->stateid->data));
 647         WRITE32(OP_CLOSE);
 648         WRITE32(arg->seqid->sequence->counter);
 649         WRITEMEM(arg->stateid->data, sizeof(arg->stateid->data));
 650
 651         return 0;
 652 }
 653
 654 static int encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args)
 655 {
 656         __be32 *p;
 657
 658         RESERVE_SPACE(16);
 659         WRITE32(OP_COMMIT);
 660         WRITE64(args->offset);
 661         WRITE32(args->count);
 662
 663         return 0;
 664 }
 665
 666 static int encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create)
 667 {
 668         __be32 *p;
 669
 670         RESERVE_SPACE(8);
 671         WRITE32(OP_CREATE);
 672         WRITE32(create->ftype);
 673
 674         switch (create->ftype) {
 675         case NF4LNK:
 676                 RESERVE_SPACE(4);
 677                 WRITE32(create->u.symlink.len);
 678                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
 679                 break;
 680
 681         case NF4BLK: case NF4CHR:
 682                 RESERVE_SPACE(8);
 683                 WRITE32(create->u.device.specdata1);
 684                 WRITE32(create->u.device.specdata2);
 685                 break;
 686
 687         default:
 688                 break;
 689         }
 690
 691         RESERVE_SPACE(4 + create->name->len);
 692         WRITE32(create->name->len);
 693         WRITEMEM(create->name->name, create->name->len);
 694
 695         return encode_attrs(xdr, create->attrs, create->server);
 696 }
 697
 698 static int encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap)
 699 {
 700         __be32 *p;
 701
 702         RESERVE_SPACE(12);
 703         WRITE32(OP_GETATTR);
 704         WRITE32(1);
 705         WRITE32(bitmap);
 706         return 0;
 707 }
 708
 709 static int encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1)
 710 {
 711         __be32 *p;
 712
 713         RESERVE_SPACE(16);
 714         WRITE32(OP_GETATTR);
 715         WRITE32(2);
 716         WRITE32(bm0);
 717         WRITE32(bm1);
 718         return 0;
 719 }
 720
 721 static int encode_getfattr(struct xdr_stream *xdr, const u32* bitmask)
 722 {
 723         return encode_getattr_two(xdr,
 724                         bitmask[0] & nfs4_fattr_bitmap[0],
 725                         bitmask[1] & nfs4_fattr_bitmap[1]);
 726 }
 727
 728 static int encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask)
 729 {
 730         return encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
 731                         bitmask[1] & nfs4_fsinfo_bitmap[1]);
 732 }
 733
 734 static int encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask)
 735 {
 736         return encode_getattr_two(xdr,
 737                                   bitmask[0] & nfs4_fs_locations_bitmap[0],
 738                                   bitmask[1] & nfs4_fs_locations_bitmap[1]);
 739 }
 740
 741 static int encode_getfh(struct xdr_stream *xdr)
 742 {
 743         __be32 *p;
 744
 745         RESERVE_SPACE(4);
 746         WRITE32(OP_GETFH);
 747
 748         return 0;
 749 }
 750
 751 static int encode_link(struct xdr_stream *xdr, const struct qstr *name)
 752 {
 753         __be32 *p;
 754
 755         RESERVE_SPACE(8 + name->len);
 756         WRITE32(OP_LINK);
 757         WRITE32(name->len);
 758         WRITEMEM(name->name, name->len);
 759
 760         return 0;
 761 }
 762
 763 static inline int nfs4_lock_type(struct file_lock *fl, int block)
 764 {
 765         if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
 766                 return block ? NFS4_READW_LT : NFS4_READ_LT;
 767         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
 768 }
 769
 770 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
 771 {
 772         if (fl->fl_end == OFFSET_MAX)
 773                 return ~(uint64_t)0;
 774         return fl->fl_end - fl->fl_start + 1;
 775 }
 776
 777 /*
 778  * opcode,type,reclaim,offset,length,new_lock_owner = 32
 779  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
 780  */
 781 static int encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args)
 782 {
 783         __be32 *p;
 784
 785         RESERVE_SPACE(32);
 786         WRITE32(OP_LOCK);
 787         WRITE32(nfs4_lock_type(args->fl, args->block));
 788         WRITE32(args->reclaim);
 789         WRITE64(args->fl->fl_start);
 790         WRITE64(nfs4_lock_length(args->fl));
 791         WRITE32(args->new_lock_owner);
 792         if (args->new_lock_owner){
 793                 RESERVE_SPACE(40);
 794                 WRITE32(args->open_seqid->sequence->counter);
 795                 WRITEMEM(args->open_stateid->data, sizeof(args->open_stateid->data));
 796                 WRITE32(args->lock_seqid->sequence->counter);
 797                 WRITE64(args->lock_owner.clientid);
 798                 WRITE32(4);
 799                 WRITE32(args->lock_owner.id);
 800         }
 801         else {
 802                 RESERVE_SPACE(20);
 803                 WRITEMEM(args->lock_stateid->data, sizeof(args->lock_stateid->data));
 804                 WRITE32(args->lock_seqid->sequence->counter);
 805         }
 806
 807         return 0;
 808 }
 809
 810 static int encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args)
 811 {
 812         __be32 *p;
 813
 814         RESERVE_SPACE(40);
 815         WRITE32(OP_LOCKT);
 816         WRITE32(nfs4_lock_type(args->fl, 0));
 817         WRITE64(args->fl->fl_start);
 818         WRITE64(nfs4_lock_length(args->fl));
 819         WRITE64(args->lock_owner.clientid);
 820         WRITE32(4);
 821         WRITE32(args->lock_owner.id);
 822
 823         return 0;
 824 }
 825
 826 static int encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args)
 827 {
 828         __be32 *p;
 829
 830         RESERVE_SPACE(44);
 831         WRITE32(OP_LOCKU);
 832         WRITE32(nfs4_lock_type(args->fl, 0));
 833         WRITE32(args->seqid->sequence->counter);
 834         WRITEMEM(args->stateid->data, sizeof(args->stateid->data));
 835         WRITE64(args->fl->fl_start);
 836         WRITE64(nfs4_lock_length(args->fl));
 837
 838         return 0;
 839 }
 840
 841 static int encode_lookup(struct xdr_stream *xdr, const struct qstr *name)
 842 {
 843         int len = name->len;
 844         __be32 *p;
 845
 846         RESERVE_SPACE(8 + len);
 847         WRITE32(OP_LOOKUP);
 848         WRITE32(len);
 849         WRITEMEM(name->name, len);
 850
 851         return 0;
 852 }
 853
 854 static void encode_share_access(struct xdr_stream *xdr, int open_flags)
 855 {
 856         __be32 *p;
 857
 858         RESERVE_SPACE(8);
 859         switch (open_flags & (FMODE_READ|FMODE_WRITE)) {
 860                 case FMODE_READ:
 861                         WRITE32(NFS4_SHARE_ACCESS_READ);
 862                         break;
 863                 case FMODE_WRITE:
 864                         WRITE32(NFS4_SHARE_ACCESS_WRITE);
 865                         break;
 866                 case FMODE_READ|FMODE_WRITE:
 867                         WRITE32(NFS4_SHARE_ACCESS_BOTH);
 868                         break;
 869                 default:
 870                         BUG();
 871         }
 872         WRITE32(0);             /* for linux, share_deny = 0 always */
 873 }
 874
 875 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
 876 {
 877         __be32 *p;
 878  /*
 879  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
 880  * owner 4 = 32
 881  */
 882         RESERVE_SPACE(8);
 883         WRITE32(OP_OPEN);
 884         WRITE32(arg->seqid->sequence->counter);
 885         encode_share_access(xdr, arg->open_flags);
 886         RESERVE_SPACE(16);
 887         WRITE64(arg->clientid);
 888         WRITE32(4);
 889         WRITE32(arg->id);
 890 }
 891
 892 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
 893 {
 894         __be32 *p;
 895
 896         RESERVE_SPACE(4);
 897         switch(arg->open_flags & O_EXCL) {
 898                 case 0:
 899                         WRITE32(NFS4_CREATE_UNCHECKED);
 900                         encode_attrs(xdr, arg->u.attrs, arg->server);
 901                         break;
 902                 default:
 903                         WRITE32(NFS4_CREATE_EXCLUSIVE);
 904                         encode_nfs4_verifier(xdr, &arg->u.verifier);
 905         }
 906 }
 907
 908 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
 909 {
 910         __be32 *p;
 911
 912         RESERVE_SPACE(4);
 913         switch (arg->open_flags & O_CREAT) {
 914                 case 0:
 915                         WRITE32(NFS4_OPEN_NOCREATE);
 916                         break;
 917                 default:
 918                         BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
 919                         WRITE32(NFS4_OPEN_CREATE);
 920                         encode_createmode(xdr, arg);
 921         }
 922 }
 923
 924 static inline void encode_delegation_type(struct xdr_stream *xdr, int delegation_type)
 925 {
 926         __be32 *p;
 927
 928         RESERVE_SPACE(4);
 929         switch (delegation_type) {
 930                 case 0:
 931                         WRITE32(NFS4_OPEN_DELEGATE_NONE);
 932                         break;
 933                 case FMODE_READ:
 934                         WRITE32(NFS4_OPEN_DELEGATE_READ);
 935                         break;
 936                 case FMODE_WRITE|FMODE_READ:
 937                         WRITE32(NFS4_OPEN_DELEGATE_WRITE);
 938                         break;
 939                 default:
 940                         BUG();
 941         }
 942 }
 943
 944 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
 945 {
 946         __be32 *p;
 947
 948         RESERVE_SPACE(4);
 949         WRITE32(NFS4_OPEN_CLAIM_NULL);
 950         encode_string(xdr, name->len, name->name);
 951 }
 952
 953 static inline void encode_claim_previous(struct xdr_stream *xdr, int type)
 954 {
 955         __be32 *p;
 956
 957         RESERVE_SPACE(4);
 958         WRITE32(NFS4_OPEN_CLAIM_PREVIOUS);
 959         encode_delegation_type(xdr, type);
 960 }
 961
 962 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
 963 {
 964         __be32 *p;
 965
 966         RESERVE_SPACE(4+sizeof(stateid->data));
 967         WRITE32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
 968         WRITEMEM(stateid->data, sizeof(stateid->data));
 969         encode_string(xdr, name->len, name->name);
 970 }
 971
 972 static int encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg)
 973 {
 974         encode_openhdr(xdr, arg);
 975         encode_opentype(xdr, arg);
 976         switch (arg->claim) {
 977                 case NFS4_OPEN_CLAIM_NULL:
 978                         encode_claim_null(xdr, arg->name);
 979                         break;
 980                 case NFS4_OPEN_CLAIM_PREVIOUS:
 981                         encode_claim_previous(xdr, arg->u.delegation_type);
 982                         break;
 983                 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
 984                         encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
 985                         break;
 986                 default:
 987                         BUG();
 988         }
 989         return 0;
 990 }
 991
 992 static int encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg)
 993 {
 994         __be32 *p;
 995
 996         RESERVE_SPACE(8+sizeof(arg->stateid->data));
 997         WRITE32(OP_OPEN_CONFIRM);
 998         WRITEMEM(arg->stateid->data, sizeof(arg->stateid->data));
 999         WRITE32(arg->seqid->sequence->counter);
1000
1001         return 0;
1002 }
1003
1004 static int encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg)
1005 {
1006         __be32 *p;
1007
1008         RESERVE_SPACE(8+sizeof(arg->stateid->data));
1009         WRITE32(OP_OPEN_DOWNGRADE);
1010         WRITEMEM(arg->stateid->data, sizeof(arg->stateid->data));
1011         WRITE32(arg->seqid->sequence->counter);
1012         encode_share_access(xdr, arg->open_flags);
1013         return 0;
1014 }
1015
1016 static int
1017 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh)
1018 {
1019         int len = fh->size;
1020         __be32 *p;
1021
1022         RESERVE_SPACE(8 + len);
1023         WRITE32(OP_PUTFH);
1024         WRITE32(len);
1025         WRITEMEM(fh->data, len);
1026
1027         return 0;
1028 }
1029
1030 static int encode_putrootfh(struct xdr_stream *xdr)
1031 {
1032         __be32 *p;
1033
1034         RESERVE_SPACE(4);
1035         WRITE32(OP_PUTROOTFH);
1036
1037         return 0;
1038 }
1039
1040 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx)
1041 {
1042         nfs4_stateid stateid;
1043         __be32 *p;
1044
1045         RESERVE_SPACE(16);
1046         if (ctx->state != NULL) {
1047                 nfs4_copy_stateid(&stateid, ctx->state, ctx->lockowner);
1048                 WRITEMEM(stateid.data, sizeof(stateid.data));
1049         } else
1050                 WRITEMEM(zero_stateid.data, sizeof(zero_stateid.data));
1051 }
1052
1053 static int encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args)
1054 {
1055         __be32 *p;
1056
1057         RESERVE_SPACE(4);
1058         WRITE32(OP_READ);
1059
1060         encode_stateid(xdr, args->context);
1061
1062         RESERVE_SPACE(12);
1063         WRITE64(args->offset);
1064         WRITE32(args->count);
1065
1066         return 0;
1067 }
1068
1069 static int encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req)
1070 {
1071         struct rpc_auth *auth = req->rq_task->tk_auth;
1072         uint32_t attrs[2] = {
1073                 FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID,
1074                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1075         };
1076         int replen;
1077         __be32 *p;
1078
1079         RESERVE_SPACE(32+sizeof(nfs4_verifier));
1080         WRITE32(OP_READDIR);
1081         WRITE64(readdir->cookie);
1082         WRITEMEM(readdir->verifier.data, sizeof(readdir->verifier.data));
1083         WRITE32(readdir->count >> 1);  /* We're not doing readdirplus */
1084         WRITE32(readdir->count);
1085         WRITE32(2);
1086         /* Switch to mounted_on_fileid if the server supports it */
1087         if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
1088                 attrs[0] &= ~FATTR4_WORD0_FILEID;
1089         else
1090                 attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
1091         WRITE32(attrs[0] & readdir->bitmask[0]);
1092         WRITE32(attrs[1] & readdir->bitmask[1]);
1093         dprintk("%s: cookie = %Lu, verifier = 0x%x%x, bitmap = 0x%x%x\n",
1094                         __FUNCTION__,
1095                         (unsigned long long)readdir->cookie,
1096                         ((u32 *)readdir->verifier.data)[0],
1097                         ((u32 *)readdir->verifier.data)[1],
1098                         attrs[0] & readdir->bitmask[0],
1099                         attrs[1] & readdir->bitmask[1]);
1100
1101         /* set up reply kvec
1102          *    toplevel_status + taglen + rescount + OP_PUTFH + status
1103          *      + OP_READDIR + status + verifer(2)  = 9
1104          */
1105         replen = (RPC_REPHDRSIZE + auth->au_rslack + 9) << 2;
1106         xdr_inline_pages(&req->rq_rcv_buf, replen, readdir->pages,
1107                          readdir->pgbase, readdir->count);
1108         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
1109                         __FUNCTION__, replen, readdir->pages,
1110                         readdir->pgbase, readdir->count);
1111
1112         return 0;
1113 }
1114
1115 static int encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req)
1116 {
1117         struct rpc_auth *auth = req->rq_task->tk_auth;
1118         unsigned int replen;
1119         __be32 *p;
1120
1121         RESERVE_SPACE(4);
1122         WRITE32(OP_READLINK);
1123
1124         /* set up reply kvec
1125          *    toplevel_status + taglen + rescount + OP_PUTFH + status
1126          *      + OP_READLINK + status + string length = 8
1127          */
1128         replen = (RPC_REPHDRSIZE + auth->au_rslack + 8) << 2;
1129         xdr_inline_pages(&req->rq_rcv_buf, replen, readlink->pages,
1130                         readlink->pgbase, readlink->pglen);
1131
1132         return 0;
1133 }
1134
1135 static int encode_remove(struct xdr_stream *xdr, const struct qstr *name)
1136 {
1137         __be32 *p;
1138
1139         RESERVE_SPACE(8 + name->len);
1140         WRITE32(OP_REMOVE);
1141         WRITE32(name->len);
1142         WRITEMEM(name->name, name->len);
1143
1144         return 0;
1145 }
1146
1147 static int encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname)
1148 {
1149         __be32 *p;
1150
1151         RESERVE_SPACE(8 + oldname->len);
1152         WRITE32(OP_RENAME);
1153         WRITE32(oldname->len);
1154         WRITEMEM(oldname->name, oldname->len);
1155
1156         RESERVE_SPACE(4 + newname->len);
1157         WRITE32(newname->len);
1158         WRITEMEM(newname->name, newname->len);
1159
1160         return 0;
1161 }
1162
1163 static int encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid)
1164 {
1165         __be32 *p;
1166
1167         RESERVE_SPACE(12);
1168         WRITE32(OP_RENEW);
1169         WRITE64(client_stateid->cl_clientid);
1170
1171         return 0;
1172 }
1173
1174 static int
1175 encode_restorefh(struct xdr_stream *xdr)
1176 {
1177         __be32 *p;
1178
1179         RESERVE_SPACE(4);
1180         WRITE32(OP_RESTOREFH);
1181
1182         return 0;
1183 }
1184
1185 static int
1186 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg)
1187 {
1188         __be32 *p;
1189
1190         RESERVE_SPACE(4+sizeof(zero_stateid.data));
1191         WRITE32(OP_SETATTR);
1192         WRITEMEM(zero_stateid.data, sizeof(zero_stateid.data));
1193         RESERVE_SPACE(2*4);
1194         WRITE32(1);
1195         WRITE32(FATTR4_WORD0_ACL);
1196         if (arg->acl_len % 4)
1197                 return -EINVAL;
1198         RESERVE_SPACE(4);
1199         WRITE32(arg->acl_len);
1200         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1201         return 0;
1202 }
1203
1204 static int
1205 encode_savefh(struct xdr_stream *xdr)
1206 {
1207         __be32 *p;
1208
1209         RESERVE_SPACE(4);
1210         WRITE32(OP_SAVEFH);
1211
1212         return 0;
1213 }
1214
1215 static int encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server)
1216 {
1217         int status;
1218         __be32 *p;
1219
1220         RESERVE_SPACE(4+sizeof(arg->stateid.data));
1221         WRITE32(OP_SETATTR);
1222         WRITEMEM(arg->stateid.data, sizeof(arg->stateid.data));
1223
1224         if ((status = encode_attrs(xdr, arg->iap, server)))
1225                 return status;
1226
1227         return 0;
1228 }
1229
1230 static int encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid)
1231 {
1232         __be32 *p;
1233
1234         RESERVE_SPACE(4 + sizeof(setclientid->sc_verifier->data));
1235         WRITE32(OP_SETCLIENTID);
1236         WRITEMEM(setclientid->sc_verifier->data, sizeof(setclientid->sc_verifier->data));
1237
1238         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1239         RESERVE_SPACE(4);
1240         WRITE32(setclientid->sc_prog);
1241         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1242         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1243         RESERVE_SPACE(4);
1244         WRITE32(setclientid->sc_cb_ident);
1245
1246         return 0;
1247 }
1248
1249 static int encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs_client *client_state)
1250 {
1251         __be32 *p;
1252
1253         RESERVE_SPACE(12 + sizeof(client_state->cl_confirm.data));
1254         WRITE32(OP_SETCLIENTID_CONFIRM);
1255         WRITE64(client_state->cl_clientid);
1256         WRITEMEM(client_state->cl_confirm.data, sizeof(client_state->cl_confirm.data));
1257
1258         return 0;
1259 }
1260
1261 static int encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args)
1262 {
1263         __be32 *p;
1264
1265         RESERVE_SPACE(4);
1266         WRITE32(OP_WRITE);
1267
1268         encode_stateid(xdr, args->context);
1269
1270         RESERVE_SPACE(16);
1271         WRITE64(args->offset);
1272         WRITE32(args->stable);
1273         WRITE32(args->count);
1274
1275         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1276
1277         return 0;
1278 }
1279
1280 static int encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1281 {
1282         __be32 *p;
1283
1284         RESERVE_SPACE(20);
1285
1286         WRITE32(OP_DELEGRETURN);
1287         WRITEMEM(stateid->data, sizeof(stateid->data));
1288         return 0;
1289
1290 }
1291 /*
1292  * END OF "GENERIC" ENCODE ROUTINES.
1293  */
1294
1295 /*
1296  * Encode an ACCESS request
1297  */
1298 static int nfs4_xdr_enc_access(struct rpc_rqst *req, __be32 *p, const struct nfs4_accessargs *args)
1299 {
1300         struct xdr_stream xdr;
1301         struct compound_hdr hdr = {
1302                 .nops = 2,
1303         };
1304         int status;
1305
1306         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1307         encode_compound_hdr(&xdr, &hdr);
1308         if ((status = encode_putfh(&xdr, args->fh)) == 0)
1309                 status = encode_access(&xdr, args->access);
1310         return status;
1311 }
1312
1313 /*
1314  * Encode LOOKUP request
1315  */
1316 static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_arg *args)
1317 {
1318         struct xdr_stream xdr;
1319         struct compound_hdr hdr = {
1320                 .nops = 4,
1321         };
1322         int status;
1323
1324         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1325         encode_compound_hdr(&xdr, &hdr);
1326         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1327                 goto out;
1328         if ((status = encode_lookup(&xdr, args->name)) != 0)
1329                 goto out;
1330         if ((status = encode_getfh(&xdr)) != 0)
1331                 goto out;
1332         status = encode_getfattr(&xdr, args->bitmask);
1333 out:
1334         return status;
1335 }
1336
1337 /*
1338  * Encode LOOKUP_ROOT request
1339  */
1340 static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_root_arg *args)
1341 {
1342         struct xdr_stream xdr;
1343         struct compound_hdr hdr = {
1344                 .nops = 3,
1345         };
1346         int status;
1347
1348         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1349         encode_compound_hdr(&xdr, &hdr);
1350         if ((status = encode_putrootfh(&xdr)) != 0)
1351                 goto out;
1352         if ((status = encode_getfh(&xdr)) == 0)
1353                 status = encode_getfattr(&xdr, args->bitmask);
1354 out:
1355         return status;
1356 }
1357
1358 /*
1359  * Encode REMOVE request
1360  */
1361 static int nfs4_xdr_enc_remove(struct rpc_rqst *req, __be32 *p, const struct nfs4_remove_arg *args)
1362 {
1363         struct xdr_stream xdr;
1364         struct compound_hdr hdr = {
1365                 .nops = 3,
1366         };
1367         int status;
1368
1369         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1370         encode_compound_hdr(&xdr, &hdr);
1371         if ((status = encode_putfh(&xdr, args->fh)) != 0)
1372                 goto out;
1373         if ((status = encode_remove(&xdr, args->name)) != 0)
1374                 goto out;
1375         status = encode_getfattr(&xdr, args->bitmask);
1376 out:
1377         return status;
1378 }
1379
1380 /*
1381  * Encode RENAME request
1382  */
1383 static int nfs4_xdr_enc_rename(struct rpc_rqst *req, __be32 *p, const struct nfs4_rename_arg *args)
1384 {
1385         struct xdr_stream xdr;
1386         struct compound_hdr hdr = {
1387                 .nops = 7,
1388         };
1389         int status;
1390
1391         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1392         encode_compound_hdr(&xdr, &hdr);
1393         if ((status = encode_putfh(&xdr, args->old_dir)) != 0)
1394                 goto out;
1395         if ((status = encode_savefh(&xdr)) != 0)
1396                 goto out;
1397         if ((status = encode_putfh(&xdr, args->new_dir)) != 0)
1398                 goto out;
1399         if ((status = encode_rename(&xdr, args->old_name, args->new_name)) != 0)
1400                 goto out;
1401         if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
1402                 goto out;
1403         if ((status = encode_restorefh(&xdr)) != 0)
1404                 goto out;
1405         status = encode_getfattr(&xdr, args->bitmask);
1406 out:
1407         return status;
1408 }
1409
1410 /*
1411  * Encode LINK request
1412  */
1413 static int nfs4_xdr_enc_link(struct rpc_rqst *req, __be32 *p, const struct nfs4_link_arg *args)
1414 {
1415         struct xdr_stream xdr;
1416         struct compound_hdr hdr = {
1417                 .nops = 7,
1418         };
1419         int status;
1420
1421         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1422         encode_compound_hdr(&xdr, &hdr);
1423         if ((status = encode_putfh(&xdr, args->fh)) != 0)
1424                 goto out;
1425         if ((status = encode_savefh(&xdr)) != 0)
1426                 goto out;
1427         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1428                 goto out;
1429         if ((status = encode_link(&xdr, args->name)) != 0)
1430                 goto out;
1431         if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
1432                 goto out;
1433         if ((status = encode_restorefh(&xdr)) != 0)
1434                 goto out;
1435         status = encode_getfattr(&xdr, args->bitmask);
1436 out:
1437         return status;
1438 }
1439
1440 /*
1441  * Encode CREATE request
1442  */
1443 static int nfs4_xdr_enc_create(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1444 {
1445         struct xdr_stream xdr;
1446         struct compound_hdr hdr = {
1447                 .nops = 7,
1448         };
1449         int status;
1450
1451         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1452         encode_compound_hdr(&xdr, &hdr);
1453         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1454                 goto out;
1455         if ((status = encode_savefh(&xdr)) != 0)
1456                 goto out;
1457         if ((status = encode_create(&xdr, args)) != 0)
1458                 goto out;
1459         if ((status = encode_getfh(&xdr)) != 0)
1460                 goto out;
1461         if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
1462                 goto out;
1463         if ((status = encode_restorefh(&xdr)) != 0)
1464                 goto out;
1465         status = encode_getfattr(&xdr, args->bitmask);
1466 out:
1467         return status;
1468 }
1469
1470 /*
1471  * Encode SYMLINK request
1472  */
1473 static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1474 {
1475         return nfs4_xdr_enc_create(req, p, args);
1476 }
1477
1478 /*
1479  * Encode GETATTR request
1480  */
1481 static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, __be32 *p, const struct nfs4_getattr_arg *args)
1482 {
1483         struct xdr_stream xdr;
1484         struct compound_hdr hdr = {
1485                 .nops = 2,
1486         };
1487         int status;
1488
1489         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1490         encode_compound_hdr(&xdr, &hdr);
1491         if ((status = encode_putfh(&xdr, args->fh)) == 0)
1492                 status = encode_getfattr(&xdr, args->bitmask);
1493         return status;
1494 }
1495
1496 /*
1497  * Encode a CLOSE request
1498  */
1499 static int nfs4_xdr_enc_close(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1500 {
1501         struct xdr_stream xdr;
1502         struct compound_hdr hdr = {
1503                 .nops   = 3,
1504         };
1505         int status;
1506
1507         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1508         encode_compound_hdr(&xdr, &hdr);
1509         status = encode_putfh(&xdr, args->fh);
1510         if(status)
1511                 goto out;
1512         status = encode_close(&xdr, args);
1513         if (status != 0)
1514                 goto out;
1515         status = encode_getfattr(&xdr, args->bitmask);
1516 out:
1517         return status;
1518 }
1519
1520 /*
1521  * Encode an OPEN request
1522  */
1523 static int nfs4_xdr_enc_open(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1524 {
1525         struct xdr_stream xdr;
1526         struct compound_hdr hdr = {
1527                 .nops = 7,
1528         };
1529         int status;
1530
1531         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1532         encode_compound_hdr(&xdr, &hdr);
1533         status = encode_putfh(&xdr, args->fh);
1534         if (status)
1535                 goto out;
1536         status = encode_savefh(&xdr);
1537         if (status)
1538                 goto out;
1539         status = encode_open(&xdr, args);
1540         if (status)
1541                 goto out;
1542         status = encode_getfh(&xdr);
1543         if (status)
1544                 goto out;
1545         status = encode_getfattr(&xdr, args->bitmask);
1546         if (status)
1547                 goto out;
1548         status = encode_restorefh(&xdr);
1549         if (status)
1550                 goto out;
1551         status = encode_getfattr(&xdr, args->bitmask);
1552 out:
1553         return status;
1554 }
1555
1556 /*
1557  * Encode an OPEN_CONFIRM request
1558  */
1559 static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_open_confirmargs *args)
1560 {
1561         struct xdr_stream xdr;
1562         struct compound_hdr hdr = {
1563                 .nops   = 2,
1564         };
1565         int status;
1566
1567         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1568         encode_compound_hdr(&xdr, &hdr);
1569         status = encode_putfh(&xdr, args->fh);
1570         if(status)
1571                 goto out;
1572         status = encode_open_confirm(&xdr, args);
1573 out:
1574         return status;
1575 }
1576
1577 /*
1578  * Encode an OPEN request with no attributes.
1579  */
1580 static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1581 {
1582         struct xdr_stream xdr;
1583         struct compound_hdr hdr = {
1584                 .nops   = 3,
1585         };
1586         int status;
1587
1588         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1589         encode_compound_hdr(&xdr, &hdr);
1590         status = encode_putfh(&xdr, args->fh);
1591         if (status)
1592                 goto out;
1593         status = encode_open(&xdr, args);
1594         if (status)
1595                 goto out;
1596         status = encode_getfattr(&xdr, args->bitmask);
1597 out:
1598         return status;
1599 }
1600
1601 /*
1602  * Encode an OPEN_DOWNGRADE request
1603  */
1604 static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1605 {
1606         struct xdr_stream xdr;
1607         struct compound_hdr hdr = {
1608                 .nops   = 3,
1609         };
1610         int status;
1611
1612         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1613         encode_compound_hdr(&xdr, &hdr);
1614         status = encode_putfh(&xdr, args->fh);
1615         if (status)
1616                 goto out;
1617         status = encode_open_downgrade(&xdr, args);
1618         if (status != 0)
1619                 goto out;
1620         status = encode_getfattr(&xdr, args->bitmask);
1621 out:
1622         return status;
1623 }
1624
1625 /*
1626  * Encode a LOCK request
1627  */
1628 static int nfs4_xdr_enc_lock(struct rpc_rqst *req, __be32 *p, struct nfs_lock_args *args)
1629 {
1630         struct xdr_stream xdr;
1631         struct compound_hdr hdr = {
1632                 .nops   = 2,
1633         };
1634         int status;
1635
1636         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1637         encode_compound_hdr(&xdr, &hdr);
1638         status = encode_putfh(&xdr, args->fh);
1639         if(status)
1640                 goto out;
1641         status = encode_lock(&xdr, args);
1642 out:
1643         return status;
1644 }
1645
1646 /*
1647  * Encode a LOCKT request
1648  */
1649 static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, __be32 *p, struct nfs_lockt_args *args)
1650 {
1651         struct xdr_stream xdr;
1652         struct compound_hdr hdr = {
1653                 .nops   = 2,
1654         };
1655         int status;
1656
1657         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1658         encode_compound_hdr(&xdr, &hdr);
1659         status = encode_putfh(&xdr, args->fh);
1660         if(status)
1661                 goto out;
1662         status = encode_lockt(&xdr, args);
1663 out:
1664         return status;
1665 }
1666
1667 /*
1668  * Encode a LOCKU request
1669  */
1670 static int nfs4_xdr_enc_locku(struct rpc_rqst *req, __be32 *p, struct nfs_locku_args *args)
1671 {
1672         struct xdr_stream xdr;
1673         struct compound_hdr hdr = {
1674                 .nops   = 2,
1675         };
1676         int status;
1677
1678         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1679         encode_compound_hdr(&xdr, &hdr);
1680         status = encode_putfh(&xdr, args->fh);
1681         if(status)
1682                 goto out;
1683         status = encode_locku(&xdr, args);
1684 out:
1685         return status;
1686 }
1687
1688 /*
1689  * Encode a READLINK request
1690  */
1691 static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_readlink *args)
1692 {
1693         struct xdr_stream xdr;
1694         struct compound_hdr hdr = {
1695                 .nops = 2,
1696         };
1697         int status;
1698
1699         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1700         encode_compound_hdr(&xdr, &hdr);
1701         status = encode_putfh(&xdr, args->fh);
1702         if(status)
1703                 goto out;
1704         status = encode_readlink(&xdr, args, req);
1705 out:
1706         return status;
1707 }
1708
1709 /*
1710  * Encode a READDIR request
1711  */
1712 static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, __be32 *p, const struct nfs4_readdir_arg *args)
1713 {
1714         struct xdr_stream xdr;
1715         struct compound_hdr hdr = {
1716                 .nops = 2,
1717         };
1718         int status;
1719
1720         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1721         encode_compound_hdr(&xdr, &hdr);
1722         status = encode_putfh(&xdr, args->fh);
1723         if(status)
1724                 goto out;
1725         status = encode_readdir(&xdr, args, req);
1726 out:
1727         return status;
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_auth;
1736         struct xdr_stream xdr;
1737         struct compound_hdr hdr = {
1738                 .nops = 2,
1739         };
1740         int replen, status;
1741
1742         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1743         encode_compound_hdr(&xdr, &hdr);
1744         status = encode_putfh(&xdr, args->fh);
1745         if (status)
1746                 goto out;
1747         status = encode_read(&xdr, args);
1748         if (status)
1749                 goto out;
1750
1751         /* set up reply kvec
1752          *    toplevel status + taglen=0 + rescount + OP_PUTFH + status
1753          *       + OP_READ + status + eof + datalen = 9
1754          */
1755         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_read_sz) << 2;
1756         xdr_inline_pages(&req->rq_rcv_buf, replen,
1757                          args->pages, args->pgbase, args->count);
1758 out:
1759         return status;
1760 }
1761
1762 /*
1763  * Encode an SETATTR request
1764  */
1765 static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, __be32 *p, struct nfs_setattrargs *args)
1766
1767 {
1768         struct xdr_stream xdr;
1769         struct compound_hdr hdr = {
1770                 .nops   = 3,
1771         };
1772         int status;
1773
1774         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1775         encode_compound_hdr(&xdr, &hdr);
1776         status = encode_putfh(&xdr, args->fh);
1777         if(status)
1778                 goto out;
1779         status = encode_setattr(&xdr, args, args->server);
1780         if(status)
1781                 goto out;
1782         status = encode_getfattr(&xdr, args->bitmask);
1783 out:
1784         return status;
1785 }
1786
1787 /*
1788  * Encode a GETACL request
1789  */
1790 static int
1791 nfs4_xdr_enc_getacl(struct rpc_rqst *req, __be32 *p,
1792                 struct nfs_getaclargs *args)
1793 {
1794         struct xdr_stream xdr;
1795         struct rpc_auth *auth = req->rq_task->tk_auth;
1796         struct compound_hdr hdr = {
1797                 .nops   = 2,
1798         };
1799         int replen, status;
1800
1801         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1802         encode_compound_hdr(&xdr, &hdr);
1803         status = encode_putfh(&xdr, args->fh);
1804         if (status)
1805                 goto out;
1806         status = encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0);
1807         /* set up reply buffer: */
1808         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_getacl_sz) << 2;
1809         xdr_inline_pages(&req->rq_rcv_buf, replen,
1810                 args->acl_pages, args->acl_pgbase, args->acl_len);
1811 out:
1812         return status;
1813 }
1814
1815 /*
1816  * Encode a WRITE request
1817  */
1818 static int nfs4_xdr_enc_write(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
1819 {
1820         struct xdr_stream xdr;
1821         struct compound_hdr hdr = {
1822                 .nops = 3,
1823         };
1824         int status;
1825
1826         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1827         encode_compound_hdr(&xdr, &hdr);
1828         status = encode_putfh(&xdr, args->fh);
1829         if (status)
1830                 goto out;
1831         status = encode_write(&xdr, args);
1832         if (status)
1833                 goto out;
1834         status = encode_getfattr(&xdr, args->bitmask);
1835 out:
1836         return status;
1837 }
1838
1839 /*
1840  *  a COMMIT request
1841  */
1842 static int nfs4_xdr_enc_commit(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
1843 {
1844         struct xdr_stream xdr;
1845         struct compound_hdr hdr = {
1846                 .nops = 3,
1847         };
1848         int status;
1849
1850         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1851         encode_compound_hdr(&xdr, &hdr);
1852         status = encode_putfh(&xdr, args->fh);
1853         if (status)
1854                 goto out;
1855         status = encode_commit(&xdr, args);
1856         if (status)
1857                 goto out;
1858         status = encode_getfattr(&xdr, args->bitmask);
1859 out:
1860         return status;
1861 }
1862
1863 /*
1864  * FSINFO request
1865  */
1866 static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs4_fsinfo_arg *args)
1867 {
1868         struct xdr_stream xdr;
1869         struct compound_hdr hdr = {
1870                 .nops   = 2,
1871         };
1872         int status;
1873
1874         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1875         encode_compound_hdr(&xdr, &hdr);
1876         status = encode_putfh(&xdr, args->fh);
1877         if (!status)
1878                 status = encode_fsinfo(&xdr, args->bitmask);
1879         return status;
1880 }
1881
1882 /*
1883  * a PATHCONF request
1884  */
1885 static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, __be32 *p, const struct nfs4_pathconf_arg *args)
1886 {
1887         struct xdr_stream xdr;
1888         struct compound_hdr hdr = {
1889                 .nops = 2,
1890         };
1891         int status;
1892
1893         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1894         encode_compound_hdr(&xdr, &hdr);
1895         status = encode_putfh(&xdr, args->fh);
1896         if (!status)
1897                 status = encode_getattr_one(&xdr,
1898                                 args->bitmask[0] & nfs4_pathconf_bitmap[0]);
1899         return status;
1900 }
1901
1902 /*
1903  * a STATFS request
1904  */
1905 static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, __be32 *p, const struct nfs4_statfs_arg *args)
1906 {
1907         struct xdr_stream xdr;
1908         struct compound_hdr hdr = {
1909                 .nops = 2,
1910         };
1911         int status;
1912
1913         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1914         encode_compound_hdr(&xdr, &hdr);
1915         status = encode_putfh(&xdr, args->fh);
1916         if (status == 0)
1917                 status = encode_getattr_two(&xdr,
1918                                 args->bitmask[0] & nfs4_statfs_bitmap[0],
1919                                 args->bitmask[1] & nfs4_statfs_bitmap[1]);
1920         return status;
1921 }
1922
1923 /*
1924  * GETATTR_BITMAP request
1925  */
1926 static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, __be32 *p, const struct nfs_fh *fhandle)
1927 {
1928         struct xdr_stream xdr;
1929         struct compound_hdr hdr = {
1930                 .nops = 2,
1931         };
1932         int status;
1933
1934         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1935         encode_compound_hdr(&xdr, &hdr);
1936         status = encode_putfh(&xdr, fhandle);
1937         if (status == 0)
1938                 status = encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
1939                                 FATTR4_WORD0_LINK_SUPPORT|
1940                                 FATTR4_WORD0_SYMLINK_SUPPORT|
1941                                 FATTR4_WORD0_ACLSUPPORT);
1942         return status;
1943 }
1944
1945 /*
1946  * a RENEW request
1947  */
1948 static int nfs4_xdr_enc_renew(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
1949 {
1950         struct xdr_stream xdr;
1951         struct compound_hdr hdr = {
1952                 .nops   = 1,
1953         };
1954
1955         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1956         encode_compound_hdr(&xdr, &hdr);
1957         return encode_renew(&xdr, clp);
1958 }
1959
1960 /*
1961  * a SETCLIENTID request
1962  */
1963 static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid *sc)
1964 {
1965         struct xdr_stream xdr;
1966         struct compound_hdr hdr = {
1967                 .nops   = 1,
1968         };
1969
1970         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1971         encode_compound_hdr(&xdr, &hdr);
1972         return encode_setclientid(&xdr, sc);
1973 }
1974
1975 /*
1976  * a SETCLIENTID_CONFIRM request
1977  */
1978 static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
1979 {
1980         struct xdr_stream xdr;
1981         struct compound_hdr hdr = {
1982                 .nops   = 3,
1983         };
1984         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
1985         int status;
1986
1987         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1988         encode_compound_hdr(&xdr, &hdr);
1989         status = encode_setclientid_confirm(&xdr, clp);
1990         if (!status)
1991                 status = encode_putrootfh(&xdr);
1992         if (!status)
1993                 status = encode_fsinfo(&xdr, lease_bitmap);
1994         return status;
1995 }
1996
1997 /*
1998  * DELEGRETURN request
1999  */
2000 static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, __be32 *p, const struct nfs4_delegreturnargs *args)
2001 {
2002         struct xdr_stream xdr;
2003         struct compound_hdr hdr = {
2004                 .nops = 3,
2005         };
2006         int status;
2007
2008         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2009         encode_compound_hdr(&xdr, &hdr);
2010         status = encode_putfh(&xdr, args->fhandle);
2011         if (status != 0)
2012                 goto out;
2013         status = encode_delegreturn(&xdr, args->stateid);
2014         if (status != 0)
2015                 goto out;
2016         status = encode_getfattr(&xdr, args->bitmask);
2017 out:
2018         return status;
2019 }
2020
2021 /*
2022  * Encode FS_LOCATIONS request
2023  */
2024 static int nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations_arg *args)
2025 {
2026         struct xdr_stream xdr;
2027         struct compound_hdr hdr = {
2028                 .nops = 3,
2029         };
2030         struct rpc_auth *auth = req->rq_task->tk_auth;
2031         int replen;
2032         int status;
2033
2034         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2035         encode_compound_hdr(&xdr, &hdr);
2036         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
2037                 goto out;
2038         if ((status = encode_lookup(&xdr, args->name)) != 0)
2039                 goto out;
2040         if ((status = encode_fs_locations(&xdr, args->bitmask)) != 0)
2041                 goto out;
2042         /* set up reply
2043          *   toplevel_status + OP_PUTFH + status
2044          *   + OP_LOOKUP + status + OP_GETATTR + status = 7
2045          */
2046         replen = (RPC_REPHDRSIZE + auth->au_rslack + 7) << 2;
2047         xdr_inline_pages(&req->rq_rcv_buf, replen, &args->page,
2048                         0, PAGE_SIZE);
2049 out:
2050         return status;
2051 }
2052
2053 /*
2054  * START OF "GENERIC" DECODE ROUTINES.
2055  *   These may look a little ugly since they are imported from a "generic"
2056  * set of XDR encode/decode routines which are intended to be shared by
2057  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
2058  *
2059  * If the pain of reading these is too great, it should be a straightforward
2060  * task to translate them into Linux-specific versions which are more
2061  * consistent with the style used in NFSv2/v3...
2062  */
2063 #define READ32(x)         (x) = ntohl(*p++)
2064 #define READ64(x)         do {                  \
2065         (x) = (u64)ntohl(*p++) << 32;           \
2066         (x) |= ntohl(*p++);                     \
2067 } while (0)
2068 #define READTIME(x)       do {                  \
2069         p++;                                    \
2070         (x.tv_sec) = ntohl(*p++);               \
2071         (x.tv_nsec) = ntohl(*p++);              \
2072 } while (0)
2073 #define COPYMEM(x,nbytes) do {                  \
2074         memcpy((x), p, nbytes);                 \
2075         p += XDR_QUADLEN(nbytes);               \
2076 } while (0)
2077
2078 #define READ_BUF(nbytes)  do { \
2079         p = xdr_inline_decode(xdr, nbytes); \
2080         if (!p) { \
2081                 printk(KERN_WARNING "%s: reply buffer overflowed in line %d.", \
2082                                 __FUNCTION__, __LINE__); \
2083                 return -EIO; \
2084         } \
2085 } while (0)
2086
2087 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2088 {
2089         __be32 *p;
2090
2091         READ_BUF(4);
2092         READ32(*len);
2093         READ_BUF(*len);
2094         *string = (char *)p;
2095         return 0;
2096 }
2097
2098 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2099 {
2100         __be32 *p;
2101
2102         READ_BUF(8);
2103         READ32(hdr->status);
2104         READ32(hdr->taglen);
2105
2106         READ_BUF(hdr->taglen + 4);
2107         hdr->tag = (char *)p;
2108         p += XDR_QUADLEN(hdr->taglen);
2109         READ32(hdr->nops);
2110         return 0;
2111 }
2112
2113 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2114 {
2115         __be32 *p;
2116         uint32_t opnum;
2117         int32_t nfserr;
2118
2119         READ_BUF(8);
2120         READ32(opnum);
2121         if (opnum != expected) {
2122                 printk(KERN_NOTICE
2123                                 "nfs4_decode_op_hdr: Server returned operation"
2124                                 " %d but we issued a request for %d\n",
2125                                 opnum, expected);
2126                 return -EIO;
2127         }
2128         READ32(nfserr);
2129         if (nfserr != NFS_OK)
2130                 return -nfs4_stat_to_errno(nfserr);
2131         return 0;
2132 }
2133
2134 /* Dummy routine */
2135 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2136 {
2137         __be32 *p;
2138         unsigned int strlen;
2139         char *str;
2140
2141         READ_BUF(12);
2142         return decode_opaque_inline(xdr, &strlen, &str);
2143 }
2144
2145 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2146 {
2147         uint32_t bmlen;
2148         __be32 *p;
2149
2150         READ_BUF(4);
2151         READ32(bmlen);
2152
2153         bitmap[0] = bitmap[1] = 0;
2154         READ_BUF((bmlen << 2));
2155         if (bmlen > 0) {
2156                 READ32(bitmap[0]);
2157                 if (bmlen > 1)
2158                         READ32(bitmap[1]);
2159         }
2160         return 0;
2161 }
2162
2163 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
2164 {
2165         __be32 *p;
2166
2167         READ_BUF(4);
2168         READ32(*attrlen);
2169         *savep = xdr->p;
2170         return 0;
2171 }
2172
2173 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2174 {
2175         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2176                 decode_attr_bitmap(xdr, bitmask);
2177                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2178         } else
2179                 bitmask[0] = bitmask[1] = 0;
2180         dprintk("%s: bitmask=0x%x%x\n", __FUNCTION__, bitmask[0], bitmask[1]);
2181         return 0;
2182 }
2183
2184 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2185 {
2186         __be32 *p;
2187
2188         *type = 0;
2189         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2190                 return -EIO;
2191         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2192                 READ_BUF(4);
2193                 READ32(*type);
2194                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2195                         dprintk("%s: bad type %d\n", __FUNCTION__, *type);
2196                         return -EIO;
2197                 }
2198                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2199         }
2200         dprintk("%s: type=0%o\n", __FUNCTION__, nfs_type2fmt[*type].nfs2type);
2201         return 0;
2202 }
2203
2204 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2205 {
2206         __be32 *p;
2207
2208         *change = 0;
2209         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2210                 return -EIO;
2211         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2212                 READ_BUF(8);
2213                 READ64(*change);
2214                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2215         }
2216         dprintk("%s: change attribute=%Lu\n", __FUNCTION__,
2217                         (unsigned long long)*change);
2218         return 0;
2219 }
2220
2221 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2222 {
2223         __be32 *p;
2224
2225         *size = 0;
2226         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2227                 return -EIO;
2228         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2229                 READ_BUF(8);
2230                 READ64(*size);
2231                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2232         }
2233         dprintk("%s: file size=%Lu\n", __FUNCTION__, (unsigned long long)*size);
2234         return 0;
2235 }
2236
2237 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2238 {
2239         __be32 *p;
2240
2241         *res = 0;
2242         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2243                 return -EIO;
2244         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2245                 READ_BUF(4);
2246                 READ32(*res);
2247                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2248         }
2249         dprintk("%s: link support=%s\n", __FUNCTION__, *res == 0 ? "false" : "true");
2250         return 0;
2251 }
2252
2253 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2254 {
2255         __be32 *p;
2256
2257         *res = 0;
2258         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2259                 return -EIO;
2260         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2261                 READ_BUF(4);
2262                 READ32(*res);
2263                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2264         }
2265         dprintk("%s: symlink support=%s\n", __FUNCTION__, *res == 0 ? "false" : "true");
2266         return 0;
2267 }
2268
2269 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
2270 {
2271         __be32 *p;
2272
2273         fsid->major = 0;
2274         fsid->minor = 0;
2275         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2276                 return -EIO;
2277         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2278                 READ_BUF(16);
2279                 READ64(fsid->major);
2280                 READ64(fsid->minor);
2281                 bitmap[0] &= ~FATTR4_WORD0_FSID;
2282         }
2283         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __FUNCTION__,
2284                         (unsigned long long)fsid->major,
2285                         (unsigned long long)fsid->minor);
2286         return 0;
2287 }
2288
2289 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2290 {
2291         __be32 *p;
2292
2293         *res = 60;
2294         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2295                 return -EIO;
2296         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2297                 READ_BUF(4);
2298                 READ32(*res);
2299                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2300         }
2301         dprintk("%s: file size=%u\n", __FUNCTION__, (unsigned int)*res);
2302         return 0;
2303 }
2304
2305 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2306 {
2307         __be32 *p;
2308
2309         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2310         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2311                 return -EIO;
2312         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2313                 READ_BUF(4);
2314                 READ32(*res);
2315                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2316         }
2317         dprintk("%s: ACLs supported=%u\n", __FUNCTION__, (unsigned int)*res);
2318         return 0;
2319 }
2320
2321 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2322 {
2323         __be32 *p;
2324
2325         *fileid = 0;
2326         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2327                 return -EIO;
2328         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2329                 READ_BUF(8);
2330                 READ64(*fileid);
2331                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2332         }
2333         dprintk("%s: fileid=%Lu\n", __FUNCTION__, (unsigned long long)*fileid);
2334         return 0;
2335 }
2336
2337 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2338 {
2339         __be32 *p;
2340
2341         *fileid = 0;
2342         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
2343                 return -EIO;
2344         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
2345                 READ_BUF(8);
2346                 READ64(*fileid);
2347                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
2348         }
2349         dprintk("%s: fileid=%Lu\n", __FUNCTION__, (unsigned long long)*fileid);
2350         return 0;
2351 }
2352
2353 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2354 {
2355         __be32 *p;
2356         int status = 0;
2357
2358         *res = 0;
2359         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
2360                 return -EIO;
2361         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
2362                 READ_BUF(8);
2363                 READ64(*res);
2364                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
2365         }
2366         dprintk("%s: files avail=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2367         return status;
2368 }
2369
2370 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2371 {
2372         __be32 *p;
2373         int status = 0;
2374
2375         *res = 0;
2376         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
2377                 return -EIO;
2378         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
2379                 READ_BUF(8);
2380                 READ64(*res);
2381                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
2382         }
2383         dprintk("%s: files free=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2384         return status;
2385 }
2386
2387 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2388 {
2389         __be32 *p;
2390         int status = 0;
2391
2392         *res = 0;
2393         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
2394                 return -EIO;
2395         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
2396                 READ_BUF(8);
2397                 READ64(*res);
2398                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
2399         }
2400         dprintk("%s: files total=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2401         return status;
2402 }
2403
2404 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
2405 {
2406         int n;
2407         __be32 *p;
2408         int status = 0;
2409
2410         READ_BUF(4);
2411         READ32(n);
2412         if (n < 0)
2413                 goto out_eio;
2414         if (n == 0)
2415                 goto root_path;
2416         dprintk("path ");
2417         path->ncomponents = 0;
2418         while (path->ncomponents < n) {
2419                 struct nfs4_string *component = &path->components[path->ncomponents];
2420                 status = decode_opaque_inline(xdr, &component->len, &component->data);
2421                 if (unlikely(status != 0))
2422                         goto out_eio;
2423                 if (path->ncomponents != n)
2424                         dprintk("/");
2425                 dprintk("%s", component->data);
2426                 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
2427                         path->ncomponents++;
2428                 else {
2429                         dprintk("cannot parse %d components in path\n", n);
2430                         goto out_eio;
2431                 }
2432         }
2433 out:
2434         dprintk("\n");
2435         return status;
2436 root_path:
2437 /* a root pathname is sent as a zero component4 */
2438         path->ncomponents = 1;
2439         path->components[0].len=0;
2440         path->components[0].data=NULL;
2441         dprintk("path /\n");
2442         goto out;
2443 out_eio:
2444         dprintk(" status %d", status);
2445         status = -EIO;
2446         goto out;
2447 }
2448
2449 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
2450 {
2451         int n;
2452         __be32 *p;
2453         int status = -EIO;
2454
2455         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
2456                 goto out;
2457         status = 0;
2458         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
2459                 goto out;
2460         dprintk("%s: fsroot ", __FUNCTION__);
2461         status = decode_pathname(xdr, &res->fs_path);
2462         if (unlikely(status != 0))
2463                 goto out;
2464         READ_BUF(4);
2465         READ32(n);
2466         if (n <= 0)
2467                 goto out_eio;
2468         res->nlocations = 0;
2469         while (res->nlocations < n) {
2470                 int m;
2471                 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
2472
2473                 READ_BUF(4);
2474                 READ32(m);
2475                 if (m <= 0)
2476                         goto out_eio;
2477
2478                 loc->nservers = 0;
2479                 dprintk("%s: servers ", __FUNCTION__);
2480                 while (loc->nservers < m) {
2481                         struct nfs4_string *server = &loc->servers[loc->nservers];
2482                         status = decode_opaque_inline(xdr, &server->len, &server->data);
2483                         if (unlikely(status != 0))
2484                                 goto out_eio;
2485                         dprintk("%s ", server->data);
2486                         if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
2487                                 loc->nservers++;
2488                         else {
2489                                 int i;
2490                                 dprintk("%s: using first %d of %d servers returned for location %d\n", __FUNCTION__, NFS4_FS_LOCATION_MAXSERVERS, m, res->nlocations);
2491                                 for (i = loc->nservers; i < m; i++) {
2492                                         int len;
2493                                         char *data;
2494                                         status = decode_opaque_inline(xdr, &len, &data);
2495                                         if (unlikely(status != 0))
2496                                                 goto out_eio;
2497                                 }
2498                         }
2499                 }
2500                 status = decode_pathname(xdr, &loc->rootpath);
2501                 if (unlikely(status != 0))
2502                         goto out_eio;
2503                 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
2504                         res->nlocations++;
2505         }
2506 out:
2507         dprintk("%s: fs_locations done, error = %d\n", __FUNCTION__, status);
2508         return status;
2509 out_eio:
2510         status = -EIO;
2511         goto out;
2512 }
2513
2514 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2515 {
2516         __be32 *p;
2517         int status = 0;
2518
2519         *res = 0;
2520         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
2521                 return -EIO;
2522         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
2523                 READ_BUF(8);
2524                 READ64(*res);
2525                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
2526         }
2527         dprintk("%s: maxfilesize=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2528         return status;
2529 }
2530
2531 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
2532 {
2533         __be32 *p;
2534         int status = 0;
2535
2536         *maxlink = 1;
2537         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
2538                 return -EIO;
2539         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
2540                 READ_BUF(4);
2541                 READ32(*maxlink);
2542                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
2543         }
2544         dprintk("%s: maxlink=%u\n", __FUNCTION__, *maxlink);
2545         return status;
2546 }
2547
2548 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
2549 {
2550         __be32 *p;
2551         int status = 0;
2552
2553         *maxname = 1024;
2554         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
2555                 return -EIO;
2556         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
2557                 READ_BUF(4);
2558                 READ32(*maxname);
2559                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
2560         }
2561         dprintk("%s: maxname=%u\n", __FUNCTION__, *maxname);
2562         return status;
2563 }
2564
2565 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2566 {
2567         __be32 *p;
2568         int status = 0;
2569
2570         *res = 1024;
2571         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
2572                 return -EIO;
2573         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
2574                 uint64_t maxread;
2575                 READ_BUF(8);
2576                 READ64(maxread);
2577                 if (maxread > 0x7FFFFFFF)
2578                         maxread = 0x7FFFFFFF;
2579                 *res = (uint32_t)maxread;
2580                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
2581         }
2582         dprintk("%s: maxread=%lu\n", __FUNCTION__, (unsigned long)*res);
2583         return status;
2584 }
2585
2586 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2587 {
2588         __be32 *p;
2589         int status = 0;
2590
2591         *res = 1024;
2592         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
2593                 return -EIO;
2594         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
2595                 uint64_t maxwrite;
2596                 READ_BUF(8);
2597                 READ64(maxwrite);
2598                 if (maxwrite > 0x7FFFFFFF)
2599                         maxwrite = 0x7FFFFFFF;
2600                 *res = (uint32_t)maxwrite;
2601                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
2602         }
2603         dprintk("%s: maxwrite=%lu\n", __FUNCTION__, (unsigned long)*res);
2604         return status;
2605 }
2606
2607 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *mode)
2608 {
2609         __be32 *p;
2610
2611         *mode = 0;
2612         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
2613                 return -EIO;
2614         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
2615                 READ_BUF(4);
2616                 READ32(*mode);
2617                 *mode &= ~S_IFMT;
2618                 bitmap[1] &= ~FATTR4_WORD1_MODE;
2619         }
2620         dprintk("%s: file mode=0%o\n", __FUNCTION__, (unsigned int)*mode);
2621         return 0;
2622 }
2623
2624 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
2625 {
2626         __be32 *p;
2627
2628         *nlink = 1;
2629         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
2630                 return -EIO;
2631         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
2632                 READ_BUF(4);
2633                 READ32(*nlink);
2634                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
2635         }
2636         dprintk("%s: nlink=%u\n", __FUNCTION__, (unsigned int)*nlink);
2637         return 0;
2638 }
2639
2640 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, int32_t *uid)
2641 {
2642         uint32_t len;
2643         __be32 *p;
2644
2645         *uid = -2;
2646         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
2647                 return -EIO;
2648         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
2649                 READ_BUF(4);
2650                 READ32(len);
2651                 READ_BUF(len);
2652                 if (len < XDR_MAX_NETOBJ) {
2653                         if (nfs_map_name_to_uid(clp, (char *)p, len, uid) != 0)
2654                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
2655                                                 __FUNCTION__);
2656                 } else
2657                         printk(KERN_WARNING "%s: name too long (%u)!\n",
2658                                         __FUNCTION__, len);
2659                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
2660         }
2661         dprintk("%s: uid=%d\n", __FUNCTION__, (int)*uid);
2662         return 0;
2663 }
2664
2665 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, int32_t *gid)
2666 {
2667         uint32_t len;
2668         __be32 *p;
2669
2670         *gid = -2;
2671         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
2672                 return -EIO;
2673         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
2674                 READ_BUF(4);
2675                 READ32(len);
2676                 READ_BUF(len);
2677                 if (len < XDR_MAX_NETOBJ) {
2678                         if (nfs_map_group_to_gid(clp, (char *)p, len, gid) != 0)
2679                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
2680                                                 __FUNCTION__);
2681                 } else
2682                         printk(KERN_WARNING "%s: name too long (%u)!\n",
2683                                         __FUNCTION__, len);
2684                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
2685         }
2686         dprintk("%s: gid=%d\n", __FUNCTION__, (int)*gid);
2687         return 0;
2688 }
2689
2690 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
2691 {
2692         uint32_t major = 0, minor = 0;
2693         __be32 *p;
2694
2695         *rdev = MKDEV(0,0);
2696         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
2697                 return -EIO;
2698         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
2699                 dev_t tmp;
2700
2701                 READ_BUF(8);
2702                 READ32(major);
2703                 READ32(minor);
2704                 tmp = MKDEV(major, minor);
2705                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
2706                         *rdev = tmp;
2707                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
2708         }
2709         dprintk("%s: rdev=(0x%x:0x%x)\n", __FUNCTION__, major, minor);
2710         return 0;
2711 }
2712
2713 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2714 {
2715         __be32 *p;
2716         int status = 0;
2717
2718         *res = 0;
2719         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
2720                 return -EIO;
2721         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
2722                 READ_BUF(8);
2723                 READ64(*res);
2724                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
2725         }
2726         dprintk("%s: space avail=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2727         return status;
2728 }
2729
2730 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2731 {
2732         __be32 *p;
2733         int status = 0;
2734
2735         *res = 0;
2736         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
2737                 return -EIO;
2738         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
2739                 READ_BUF(8);
2740                 READ64(*res);
2741                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
2742         }
2743         dprintk("%s: space free=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2744         return status;
2745 }
2746
2747 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2748 {
2749         __be32 *p;
2750         int status = 0;
2751
2752         *res = 0;
2753         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
2754                 return -EIO;
2755         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
2756                 READ_BUF(8);
2757                 READ64(*res);
2758                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
2759         }
2760         dprintk("%s: space total=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2761         return status;
2762 }
2763
2764 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
2765 {
2766         __be32 *p;
2767
2768         *used = 0;
2769         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
2770                 return -EIO;
2771         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
2772                 READ_BUF(8);
2773                 READ64(*used);
2774                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
2775         }
2776         dprintk("%s: space used=%Lu\n", __FUNCTION__,
2777                         (unsigned long long)*used);
2778         return 0;
2779 }
2780
2781 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
2782 {
2783         __be32 *p;
2784         uint64_t sec;
2785         uint32_t nsec;
2786
2787         READ_BUF(12);
2788         READ64(sec);
2789         READ32(nsec);
2790         time->tv_sec = (time_t)sec;
2791         time->tv_nsec = (long)nsec;
2792         return 0;
2793 }
2794
2795 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2796 {
2797         int status = 0;
2798
2799         time->tv_sec = 0;
2800         time->tv_nsec = 0;
2801         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
2802                 return -EIO;
2803         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
2804                 status = decode_attr_time(xdr, time);
2805                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
2806         }
2807         dprintk("%s: atime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2808         return status;
2809 }
2810
2811 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2812 {
2813         int status = 0;
2814
2815         time->tv_sec = 0;
2816         time->tv_nsec = 0;
2817         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
2818                 return -EIO;
2819         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
2820                 status = decode_attr_time(xdr, time);
2821                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
2822         }
2823         dprintk("%s: ctime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2824         return status;
2825 }
2826
2827 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2828 {
2829         int status = 0;
2830
2831         time->tv_sec = 0;
2832         time->tv_nsec = 0;
2833         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
2834                 return -EIO;
2835         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
2836                 status = decode_attr_time(xdr, time);
2837                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
2838         }
2839         dprintk("%s: mtime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2840         return status;
2841 }
2842
2843 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
2844 {
2845         unsigned int attrwords = XDR_QUADLEN(attrlen);
2846         unsigned int nwords = xdr->p - savep;
2847
2848         if (unlikely(attrwords != nwords)) {
2849                 printk(KERN_WARNING "%s: server returned incorrect attribute length: %u %c %u\n",
2850                                 __FUNCTION__,
2851                                 attrwords << 2,
2852                                 (attrwords < nwords) ? '<' : '>',
2853                                 nwords << 2);
2854                 return -EIO;
2855         }
2856         return 0;
2857 }
2858
2859 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2860 {
2861         __be32 *p;
2862
2863         READ_BUF(20);
2864         READ32(cinfo->atomic);
2865         READ64(cinfo->before);
2866         READ64(cinfo->after);
2867         return 0;
2868 }
2869
2870 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
2871 {
2872         __be32 *p;
2873         uint32_t supp, acc;
2874         int status;
2875
2876         status = decode_op_hdr(xdr, OP_ACCESS);
2877         if (status)
2878                 return status;
2879         READ_BUF(8);
2880         READ32(supp);
2881         READ32(acc);
2882         access->supported = supp;
2883         access->access = acc;
2884         return 0;
2885 }
2886
2887 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
2888 {
2889         __be32 *p;
2890         int status;
2891
2892         status = decode_op_hdr(xdr, OP_CLOSE);
2893         if (status)
2894                 return status;
2895         READ_BUF(sizeof(res->stateid.data));
2896         COPYMEM(res->stateid.data, sizeof(res->stateid.data));
2897         return 0;
2898 }
2899
2900 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
2901 {
2902         __be32 *p;
2903         int status;
2904
2905         status = decode_op_hdr(xdr, OP_COMMIT);
2906         if (status)
2907                 return status;
2908         READ_BUF(8);
2909         COPYMEM(res->verf->verifier, 8);
2910         return 0;
2911 }
2912
2913 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2914 {
2915         __be32 *p;
2916         uint32_t bmlen;
2917         int status;
2918
2919         status = decode_op_hdr(xdr, OP_CREATE);
2920         if (status)
2921                 return status;
2922         if ((status = decode_change_info(xdr, cinfo)))
2923                 return status;
2924         READ_BUF(4);
2925         READ32(bmlen);
2926         READ_BUF(bmlen << 2);
2927         return 0;
2928 }
2929
2930 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
2931 {
2932         __be32 *savep;
2933         uint32_t attrlen,
2934                  bitmap[2] = {0};
2935         int status;
2936
2937         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2938                 goto xdr_error;
2939         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2940                 goto xdr_error;
2941         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2942                 goto xdr_error;
2943         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
2944                 goto xdr_error;
2945         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
2946                 goto xdr_error;
2947         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
2948                 goto xdr_error;
2949         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
2950                 goto xdr_error;
2951         status = verify_attr_len(xdr, savep, attrlen);
2952 xdr_error:
2953         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
2954         return status;
2955 }
2956
2957 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
2958 {
2959         __be32 *savep;
2960         uint32_t attrlen,
2961                  bitmap[2] = {0};
2962         int status;
2963
2964         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2965                 goto xdr_error;
2966         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2967                 goto xdr_error;
2968         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2969                 goto xdr_error;
2970
2971         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
2972                 goto xdr_error;
2973         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
2974                 goto xdr_error;
2975         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
2976                 goto xdr_error;
2977         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
2978                 goto xdr_error;
2979         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
2980                 goto xdr_error;
2981         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
2982                 goto xdr_error;
2983
2984         status = verify_attr_len(xdr, savep, attrlen);
2985 xdr_error:
2986         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
2987         return status;
2988 }
2989
2990 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
2991 {
2992         __be32 *savep;
2993         uint32_t attrlen,
2994                  bitmap[2] = {0};
2995         int status;
2996
2997         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2998                 goto xdr_error;
2999         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3000                 goto xdr_error;
3001         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3002                 goto xdr_error;
3003
3004         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
3005                 goto xdr_error;
3006         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
3007                 goto xdr_error;
3008
3009         status = verify_attr_len(xdr, savep, attrlen);
3010 xdr_error:
3011         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
3012         return status;
3013 }
3014
3015 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr, const struct nfs_server *server)
3016 {
3017         __be32 *savep;
3018         uint32_t attrlen,
3019                  bitmap[2] = {0},
3020                  type;
3021         int status, fmode = 0;
3022         uint64_t fileid;
3023
3024         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3025                 goto xdr_error;
3026         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3027                 goto xdr_error;
3028
3029         fattr->bitmap[0] = bitmap[0];
3030         fattr->bitmap[1] = bitmap[1];
3031
3032         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3033                 goto xdr_error;
3034
3035
3036         if ((status = decode_attr_type(xdr, bitmap, &type)) != 0)
3037                 goto xdr_error;
3038         fattr->type = nfs_type2fmt[type].nfs2type;
3039         fmode = nfs_type2fmt[type].mode;
3040
3041         if ((status = decode_attr_change(xdr, bitmap, &fattr->change_attr)) != 0)
3042                 goto xdr_error;
3043         if ((status = decode_attr_size(xdr, bitmap, &fattr->size)) != 0)
3044                 goto xdr_error;
3045         if ((status = decode_attr_fsid(xdr, bitmap, &fattr->fsid)) != 0)
3046                 goto xdr_error;
3047         if ((status = decode_attr_fileid(xdr, bitmap, &fattr->fileid)) != 0)
3048                 goto xdr_error;
3049         if ((status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
3050                                                 struct nfs4_fs_locations,
3051                                                 fattr))) != 0)
3052                 goto xdr_error;
3053         if ((status = decode_attr_mode(xdr, bitmap, &fattr->mode)) != 0)
3054                 goto xdr_error;
3055         fattr->mode |= fmode;
3056         if ((status = decode_attr_nlink(xdr, bitmap, &fattr->nlink)) != 0)
3057                 goto xdr_error;
3058         if ((status = decode_attr_owner(xdr, bitmap, server->nfs_client, &fattr->uid)) != 0)
3059                 goto xdr_error;
3060         if ((status = decode_attr_group(xdr, bitmap, server->nfs_client, &fattr->gid)) != 0)
3061                 goto xdr_error;
3062         if ((status = decode_attr_rdev(xdr, bitmap, &fattr->rdev)) != 0)
3063                 goto xdr_error;
3064         if ((status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used)) != 0)
3065                 goto xdr_error;
3066         if ((status = decode_attr_time_access(xdr, bitmap, &fattr->atime)) != 0)
3067                 goto xdr_error;
3068         if ((status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime)) != 0)
3069                 goto xdr_error;
3070         if ((status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime)) != 0)
3071                 goto xdr_error;
3072         if ((status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid)) != 0)
3073                 goto xdr_error;
3074         if (fattr->fileid == 0 && fileid != 0)
3075                 fattr->fileid = fileid;
3076         if ((status = verify_attr_len(xdr, savep, attrlen)) == 0)
3077                 fattr->valid = NFS_ATTR_FATTR | NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4;
3078 xdr_error:
3079         dprintk("%s: xdr returned %d\n", __FUNCTION__, -status);
3080         return status;
3081 }
3082
3083
3084 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
3085 {
3086         __be32 *savep;
3087         uint32_t attrlen, bitmap[2];
3088         int status;
3089
3090         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3091                 goto xdr_error;
3092         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3093                 goto xdr_error;
3094         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3095                 goto xdr_error;
3096
3097         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
3098
3099         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
3100                 goto xdr_error;
3101         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
3102                 goto xdr_error;
3103         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
3104                 goto xdr_error;
3105         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
3106         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
3107                 goto xdr_error;
3108         fsinfo->wtpref = fsinfo->wtmax;
3109
3110         status = verify_attr_len(xdr, savep, attrlen);
3111 xdr_error:
3112         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
3113         return status;
3114 }
3115
3116 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
3117 {
3118         __be32 *p;
3119         uint32_t len;
3120         int status;
3121
3122         status = decode_op_hdr(xdr, OP_GETFH);
3123         if (status)
3124                 return status;
3125         /* Zero handle first to allow comparisons */
3126         memset(fh, 0, sizeof(*fh));
3127
3128         READ_BUF(4);
3129         READ32(len);
3130         if (len > NFS4_FHSIZE)
3131                 return -EIO;
3132         fh->size = len;
3133         READ_BUF(len);
3134         COPYMEM(fh->data, len);
3135         return 0;
3136 }
3137
3138 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3139 {
3140         int status;
3141
3142         status = decode_op_hdr(xdr, OP_LINK);
3143         if (status)
3144                 return status;
3145         return decode_change_info(xdr, cinfo);
3146 }
3147
3148 /*
3149  * We create the owner, so we know a proper owner.id length is 4.
3150  */
3151 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
3152 {
3153         uint64_t offset, length, clientid;
3154         __be32 *p;
3155         uint32_t namelen, type;
3156
3157         READ_BUF(32);
3158         READ64(offset);
3159         READ64(length);
3160         READ32(type);
3161         if (fl != NULL) {
3162                 fl->fl_start = (loff_t)offset;
3163                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
3164                 if (length == ~(uint64_t)0)
3165                         fl->fl_end = OFFSET_MAX;
3166                 fl->fl_type = F_WRLCK;
3167                 if (type & 1)
3168                         fl->fl_type = F_RDLCK;
3169                 fl->fl_pid = 0;
3170         }
3171         READ64(clientid);
3172         READ32(namelen);
3173         READ_BUF(namelen);
3174         return -NFS4ERR_DENIED;
3175 }
3176
3177 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
3178 {
3179         __be32 *p;
3180         int status;
3181
3182         status = decode_op_hdr(xdr, OP_LOCK);
3183         if (status == 0) {
3184                 READ_BUF(sizeof(res->stateid.data));
3185                 COPYMEM(res->stateid.data, sizeof(res->stateid.data));
3186         } else if (status == -NFS4ERR_DENIED)
3187                 return decode_lock_denied(xdr, NULL);
3188         return status;
3189 }
3190
3191 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
3192 {
3193         int status;
3194         status = decode_op_hdr(xdr, OP_LOCKT);
3195         if (status == -NFS4ERR_DENIED)
3196                 return decode_lock_denied(xdr, res->denied);
3197         return status;
3198 }
3199
3200 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
3201 {
3202         __be32 *p;
3203         int status;
3204
3205         status = decode_op_hdr(xdr, OP_LOCKU);
3206         if (status == 0) {
3207                 READ_BUF(sizeof(res->stateid.data));
3208                 COPYMEM(res->stateid.data, sizeof(res->stateid.data));
3209         }
3210         return status;
3211 }
3212
3213 static int decode_lookup(struct xdr_stream *xdr)
3214 {
3215         return decode_op_hdr(xdr, OP_LOOKUP);
3216 }
3217
3218 /* This is too sick! */
3219 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
3220 {
3221         __be32 *p;
3222         uint32_t limit_type, nblocks, blocksize;
3223
3224         READ_BUF(12);
3225         READ32(limit_type);
3226         switch (limit_type) {
3227                 case 1:
3228                         READ64(*maxsize);
3229                         break;
3230                 case 2:
3231                         READ32(nblocks);
3232                         READ32(blocksize);
3233                         *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
3234         }
3235         return 0;
3236 }
3237
3238 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
3239 {
3240         __be32 *p;
3241         uint32_t delegation_type;
3242
3243         READ_BUF(4);
3244         READ32(delegation_type);
3245         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
3246                 res->delegation_type = 0;
3247                 return 0;
3248         }
3249         READ_BUF(20);
3250         COPYMEM(res->delegation.data, sizeof(res->delegation.data));
3251         READ32(res->do_recall);
3252         switch (delegation_type) {
3253                 case NFS4_OPEN_DELEGATE_READ:
3254                         res->delegation_type = FMODE_READ;
3255                         break;
3256                 case NFS4_OPEN_DELEGATE_WRITE:
3257                         res->delegation_type = FMODE_WRITE|FMODE_READ;
3258                         if (decode_space_limit(xdr, &res->maxsize) < 0)
3259                                 return -EIO;
3260         }
3261         return decode_ace(xdr, NULL, res->server->nfs_client);
3262 }
3263
3264 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
3265 {
3266         __be32 *p;
3267         uint32_t bmlen;
3268         int status;
3269
3270         status = decode_op_hdr(xdr, OP_OPEN);
3271         if (status)
3272                 return status;
3273         READ_BUF(sizeof(res->stateid.data));
3274         COPYMEM(res->stateid.data, sizeof(res->stateid.data));
3275
3276         decode_change_info(xdr, &res->cinfo);
3277
3278         READ_BUF(8);
3279         READ32(res->rflags);
3280         READ32(bmlen);
3281         if (bmlen > 10)
3282                 goto xdr_error;
3283
3284         READ_BUF(bmlen << 2);
3285         p += bmlen;
3286         return decode_delegation(xdr, res);
3287 xdr_error:
3288         dprintk("%s: Bitmap too large! Length = %u\n", __FUNCTION__, bmlen);
3289         return -EIO;
3290 }
3291
3292 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
3293 {
3294         __be32 *p;
3295         int status;
3296
3297         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
3298         if (status)
3299                 return status;
3300         READ_BUF(sizeof(res->stateid.data));
3301         COPYMEM(res->stateid.data, sizeof(res->stateid.data));
3302         return 0;
3303 }
3304
3305 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
3306 {
3307         __be32 *p;
3308         int status;
3309
3310         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
3311         if (status)
3312                 return status;
3313         READ_BUF(sizeof(res->stateid.data));
3314         COPYMEM(res->stateid.data, sizeof(res->stateid.data));
3315         return 0;
3316 }
3317
3318 static int decode_putfh(struct xdr_stream *xdr)
3319 {
3320         return decode_op_hdr(xdr, OP_PUTFH);
3321 }
3322
3323 static int decode_putrootfh(struct xdr_stream *xdr)
3324 {
3325         return decode_op_hdr(xdr, OP_PUTROOTFH);
3326 }
3327
3328 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
3329 {
3330         struct kvec *iov = req->rq_rcv_buf.head;
3331         __be32 *p;
3332         uint32_t count, eof, recvd, hdrlen;
3333         int status;
3334
3335         status = decode_op_hdr(xdr, OP_READ);
3336         if (status)
3337                 return status;
3338         READ_BUF(8);
3339         READ32(eof);
3340         READ32(count);
3341         hdrlen = (u8 *) p - (u8 *) iov->iov_base;
3342         recvd = req->rq_rcv_buf.len - hdrlen;
3343         if (count > recvd) {
3344                 printk(KERN_WARNING "NFS: server cheating in read reply: "
3345                                 "count %u > recvd %u\n", count, recvd);
3346                 count = recvd;
3347                 eof = 0;
3348         }
3349         xdr_read_pages(xdr, count);
3350         res->eof = eof;
3351         res->count = count;
3352         return 0;
3353 }
3354
3355 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
3356 {
3357         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
3358         struct page     *page = *rcvbuf->pages;
3359         struct kvec     *iov = rcvbuf->head;
3360         unsigned int    nr, pglen = rcvbuf->page_len;
3361         __be32          *end, *entry, *p, *kaddr;
3362         uint32_t        len, attrlen, xlen;
3363         int             hdrlen, recvd, status;
3364
3365         status = decode_op_hdr(xdr, OP_READDIR);
3366         if (status)
3367                 return status;
3368         READ_BUF(8);
3369         COPYMEM(readdir->verifier.data, 8);
3370         dprintk("%s: verifier = 0x%x%x\n",
3371                         __FUNCTION__,
3372                         ((u32 *)readdir->verifier.data)[0],
3373                         ((u32 *)readdir->verifier.data)[1]);
3374
3375
3376         hdrlen = (char *) p - (char *) iov->iov_base;
3377         recvd = rcvbuf->len - hdrlen;
3378         if (pglen > recvd)
3379                 pglen = recvd;
3380         xdr_read_pages(xdr, pglen);
3381
3382         BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
3383         kaddr = p = kmap_atomic(page, KM_USER0);
3384         end = p + ((pglen + readdir->pgbase) >> 2);
3385         entry = p;
3386         for (nr = 0; *p++; nr++) {
3387                 if (end - p < 3)
3388                         goto short_pkt;
3389                 dprintk("cookie = %Lu, ", *((unsigned long long *)p));
3390                 p += 2;                 /* cookie */
3391                 len = ntohl(*p++);      /* filename length */
3392                 if (len > NFS4_MAXNAMLEN) {
3393                         printk(KERN_WARNING "NFS: giant filename in readdir (len 0x%x)\n", len);
3394                         goto err_unmap;
3395                 }
3396                 xlen = XDR_QUADLEN(len);
3397                 if (end - p < xlen + 1)
3398                         goto short_pkt;
3399                 dprintk("filename = %*s\n", len, (char *)p);
3400                 p += xlen;
3401                 len = ntohl(*p++);      /* bitmap length */
3402                 if (end - p < len + 1)
3403                         goto short_pkt;
3404                 p += len;
3405                 attrlen = XDR_QUADLEN(ntohl(*p++));
3406                 if (end - p < attrlen + 2)
3407                         goto short_pkt;
3408                 p += attrlen;           /* attributes */
3409                 entry = p;
3410         }
3411         if (!nr && (entry[0] != 0 || entry[1] == 0))
3412                 goto short_pkt;
3413 out:
3414         kunmap_atomic(kaddr, KM_USER0);
3415         return 0;
3416 short_pkt:
3417         dprintk("%s: short packet at entry %d\n", __FUNCTION__, nr);
3418         entry[0] = entry[1] = 0;
3419         /* truncate listing ? */
3420         if (!nr) {
3421                 printk(KERN_NOTICE "NFS: readdir reply truncated!\n");
3422                 entry[1] = 1;
3423         }
3424         goto out;
3425 err_unmap:
3426         kunmap_atomic(kaddr, KM_USER0);
3427         return -errno_NFSERR_IO;
3428 }
3429
3430 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
3431 {
3432         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
3433         struct kvec *iov = rcvbuf->head;
3434         int hdrlen, len, recvd;
3435         __be32 *p;
3436         char *kaddr;
3437         int status;
3438
3439         status = decode_op_hdr(xdr, OP_READLINK);
3440         if (status)
3441                 return status;
3442
3443         /* Convert length of symlink */
3444         READ_BUF(4);
3445         READ32(len);
3446         if (len >= rcvbuf->page_len || len <= 0) {
3447                 dprintk(KERN_WARNING "nfs: server returned giant symlink!\n");
3448                 return -ENAMETOOLONG;
3449         }
3450         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
3451         recvd = req->rq_rcv_buf.len - hdrlen;
3452         if (recvd < len) {
3453                 printk(KERN_WARNING "NFS: server cheating in readlink reply: "
3454                                 "count %u > recvd %u\n", len, recvd);
3455                 return -EIO;
3456         }
3457         xdr_read_pages(xdr, len);
3458         /*
3459          * The XDR encode routine has set things up so that
3460          * the link text will be copied directly into the
3461          * buffer.  We just have to do overflow-checking,
3462          * and and null-terminate the text (the VFS expects
3463          * null-termination).
3464          */
3465         kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
3466         kaddr[len+rcvbuf->page_base] = '\0';
3467         kunmap_atomic(kaddr, KM_USER0);
3468         return 0;
3469 }
3470
3471 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3472 {
3473         int status;
3474
3475         status = decode_op_hdr(xdr, OP_REMOVE);
3476         if (status)
3477                 goto out;
3478         status = decode_change_info(xdr, cinfo);
3479 out:
3480         return status;
3481 }
3482
3483 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
3484               struct nfs4_change_info *new_cinfo)
3485 {
3486         int status;
3487
3488         status = decode_op_hdr(xdr, OP_RENAME);
3489         if (status)
3490                 goto out;
3491         if ((status = decode_change_info(xdr, old_cinfo)))
3492                 goto out;
3493         status = decode_change_info(xdr, new_cinfo);
3494 out:
3495         return status;
3496 }
3497
3498 static int decode_renew(struct xdr_stream *xdr)
3499 {
3500         return decode_op_hdr(xdr, OP_RENEW);
3501 }
3502
3503 static int
3504 decode_restorefh(struct xdr_stream *xdr)
3505 {
3506         return decode_op_hdr(xdr, OP_RESTOREFH);
3507 }
3508
3509 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
3510                 size_t *acl_len)
3511 {
3512         __be32 *savep;
3513         uint32_t attrlen,
3514                  bitmap[2] = {0};
3515         struct kvec *iov = req->rq_rcv_buf.head;
3516         int status;
3517
3518         *acl_len = 0;
3519         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3520                 goto out;
3521         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3522                 goto out;
3523         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3524                 goto out;
3525
3526         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
3527                 return -EIO;
3528         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
3529                 int hdrlen, recvd;
3530
3531                 /* We ignore &savep and don't do consistency checks on
3532                  * the attr length.  Let userspace figure it out.... */
3533                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
3534                 recvd = req->rq_rcv_buf.len - hdrlen;
3535                 if (attrlen > recvd) {
3536                         printk(KERN_WARNING "NFS: server cheating in getattr"
3537                                         " acl reply: attrlen %u > recvd %u\n",
3538                                         attrlen, recvd);
3539                         return -EINVAL;
3540                 }
3541                 xdr_read_pages(xdr, attrlen);
3542                 *acl_len = attrlen;
3543         } else
3544                 status = -EOPNOTSUPP;
3545
3546 out:
3547         return status;
3548 }
3549
3550 static int
3551 decode_savefh(struct xdr_stream *xdr)
3552 {
3553         return decode_op_hdr(xdr, OP_SAVEFH);
3554 }
3555
3556 static int decode_setattr(struct xdr_stream *xdr, struct nfs_setattrres *res)
3557 {
3558         __be32 *p;
3559         uint32_t bmlen;
3560         int status;
3561
3562
3563         status = decode_op_hdr(xdr, OP_SETATTR);
3564         if (status)
3565                 return status;
3566         READ_BUF(4);
3567         READ32(bmlen);
3568         READ_BUF(bmlen << 2);
3569         return 0;
3570 }
3571
3572 static int decode_setclientid(struct xdr_stream *xdr, struct nfs_client *clp)
3573 {
3574         __be32 *p;
3575         uint32_t opnum;
3576         int32_t nfserr;
3577
3578         READ_BUF(8);
3579         READ32(opnum);
3580         if (opnum != OP_SETCLIENTID) {
3581                 printk(KERN_NOTICE
3582                                 "nfs4_decode_setclientid: Server returned operation"
3583                                 " %d\n", opnum);
3584                 return -EIO;
3585         }
3586         READ32(nfserr);
3587         if (nfserr == NFS_OK) {
3588                 READ_BUF(8 + sizeof(clp->cl_confirm.data));
3589                 READ64(clp->cl_clientid);
3590                 COPYMEM(clp->cl_confirm.data, sizeof(clp->cl_confirm.data));
3591         } else if (nfserr == NFSERR_CLID_INUSE) {
3592                 uint32_t len;
3593
3594                 /* skip netid string */
3595                 READ_BUF(4);
3596                 READ32(len);
3597                 READ_BUF(len);
3598
3599                 /* skip uaddr string */
3600                 READ_BUF(4);
3601                 READ32(len);
3602                 READ_BUF(len);
3603                 return -NFSERR_CLID_INUSE;
3604         } else
3605                 return -nfs4_stat_to_errno(nfserr);
3606
3607         return 0;
3608 }
3609
3610 static int decode_setclientid_confirm(struct xdr_stream *xdr)
3611 {
3612         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
3613 }
3614
3615 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
3616 {
3617         __be32 *p;
3618         int status;
3619
3620         status = decode_op_hdr(xdr, OP_WRITE);
3621         if (status)
3622                 return status;
3623
3624         READ_BUF(16);
3625         READ32(res->count);
3626         READ32(res->verf->committed);
3627         COPYMEM(res->verf->verifier, 8);
3628         return 0;
3629 }
3630
3631 static int decode_delegreturn(struct xdr_stream *xdr)
3632 {
3633         return decode_op_hdr(xdr, OP_DELEGRETURN);
3634 }
3635
3636 /*
3637  * Decode OPEN_DOWNGRADE response
3638  */
3639 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
3640 {
3641         struct xdr_stream xdr;
3642         struct compound_hdr hdr;
3643         int status;
3644
3645         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3646         status = decode_compound_hdr(&xdr, &hdr);
3647         if (status)
3648                 goto out;
3649         status = decode_putfh(&xdr);
3650         if (status)
3651                 goto out;
3652         status = decode_open_downgrade(&xdr, res);
3653         if (status != 0)
3654                 goto out;
3655         decode_getfattr(&xdr, res->fattr, res->server);
3656 out:
3657         return status;
3658 }
3659
3660 /*
3661  * END OF "GENERIC" DECODE ROUTINES.
3662  */
3663
3664 /*
3665  * Decode ACCESS response
3666  */
3667 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_accessres *res)
3668 {
3669         struct xdr_stream xdr;
3670         struct compound_hdr hdr;
3671         int status;
3672
3673         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3674         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3675                 goto out;
3676         if ((status = decode_putfh(&xdr)) == 0)
3677                 status = decode_access(&xdr, res);
3678 out:
3679         return status;
3680 }
3681
3682 /*
3683  * Decode LOOKUP response
3684  */
3685 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
3686 {
3687         struct xdr_stream xdr;
3688         struct compound_hdr hdr;
3689         int status;
3690
3691         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3692         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3693                 goto out;
3694         if ((status = decode_putfh(&xdr)) != 0)
3695                 goto out;
3696         if ((status = decode_lookup(&xdr)) != 0)
3697                 goto out;
3698         if ((status = decode_getfh(&xdr, res->fh)) != 0)
3699                 goto out;
3700         status = decode_getfattr(&xdr, res->fattr, res->server);
3701 out:
3702         return status;
3703 }
3704
3705 /*
3706  * Decode LOOKUP_ROOT response
3707  */
3708 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
3709 {
3710         struct xdr_stream xdr;
3711         struct compound_hdr hdr;
3712         int status;
3713
3714         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3715         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3716                 goto out;
3717         if ((status = decode_putrootfh(&xdr)) != 0)
3718                 goto out;
3719         if ((status = decode_getfh(&xdr, res->fh)) == 0)
3720                 status = decode_getfattr(&xdr, res->fattr, res->server);
3721 out:
3722         return status;
3723 }
3724
3725 /*
3726  * Decode REMOVE response
3727  */
3728 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_remove_res *res)
3729 {
3730         struct xdr_stream xdr;
3731         struct compound_hdr hdr;
3732         int status;
3733
3734         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3735         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3736                 goto out;
3737         if ((status = decode_putfh(&xdr)) != 0)
3738                 goto out;
3739         if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
3740                 goto out;
3741         decode_getfattr(&xdr, res->dir_attr, res->server);
3742 out:
3743         return status;
3744 }
3745
3746 /*
3747  * Decode RENAME response
3748  */
3749 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_rename_res *res)
3750 {
3751         struct xdr_stream xdr;
3752         struct compound_hdr hdr;
3753         int status;
3754
3755         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3756         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3757                 goto out;
3758         if ((status = decode_putfh(&xdr)) != 0)
3759                 goto out;
3760         if ((status = decode_savefh(&xdr)) != 0)
3761                 goto out;
3762         if ((status = decode_putfh(&xdr)) != 0)
3763                 goto out;
3764         if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0)
3765                 goto out;
3766         /* Current FH is target directory */
3767         if (decode_getfattr(&xdr, res->new_fattr, res->server) != 0)
3768                 goto out;
3769         if ((status = decode_restorefh(&xdr)) != 0)
3770                 goto out;
3771         decode_getfattr(&xdr, res->old_fattr, res->server);
3772 out:
3773         return status;
3774 }
3775
3776 /*
3777  * Decode LINK response
3778  */
3779 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_link_res *res)
3780 {
3781         struct xdr_stream xdr;
3782         struct compound_hdr hdr;
3783         int status;
3784
3785         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3786         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3787                 goto out;
3788         if ((status = decode_putfh(&xdr)) != 0)
3789                 goto out;
3790         if ((status = decode_savefh(&xdr)) != 0)
3791                 goto out;
3792         if ((status = decode_putfh(&xdr)) != 0)
3793                 goto out;
3794         if ((status = decode_link(&xdr, &res->cinfo)) != 0)
3795                 goto out;
3796         /*
3797          * Note order: OP_LINK leaves the directory as the current
3798          *             filehandle.
3799          */
3800         if (decode_getfattr(&xdr, res->dir_attr, res->server) != 0)
3801                 goto out;
3802         if ((status = decode_restorefh(&xdr)) != 0)
3803                 goto out;
3804         decode_getfattr(&xdr, res->fattr, res->server);
3805 out:
3806         return status;
3807 }
3808
3809 /*
3810  * Decode CREATE response
3811  */
3812 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
3813 {
3814         struct xdr_stream xdr;
3815         struct compound_hdr hdr;
3816         int status;
3817
3818         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3819         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3820                 goto out;
3821         if ((status = decode_putfh(&xdr)) != 0)
3822                 goto out;
3823         if ((status = decode_savefh(&xdr)) != 0)
3824                 goto out;
3825         if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
3826                 goto out;
3827         if ((status = decode_getfh(&xdr, res->fh)) != 0)
3828                 goto out;
3829         if (decode_getfattr(&xdr, res->fattr, res->server) != 0)
3830                 goto out;
3831         if ((status = decode_restorefh(&xdr)) != 0)
3832                 goto out;
3833         decode_getfattr(&xdr, res->dir_fattr, res->server);
3834 out:
3835         return status;
3836 }
3837
3838 /*
3839  * Decode SYMLINK response
3840  */
3841 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
3842 {
3843         return nfs4_xdr_dec_create(rqstp, p, res);
3844 }
3845
3846 /*
3847  * Decode GETATTR response
3848  */
3849 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_getattr_res *res)
3850 {
3851         struct xdr_stream xdr;
3852         struct compound_hdr hdr;
3853         int status;
3854
3855         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3856         status = decode_compound_hdr(&xdr, &hdr);
3857         if (status)
3858                 goto out;
3859         status = decode_putfh(&xdr);
3860         if (status)
3861                 goto out;
3862         status = decode_getfattr(&xdr, res->fattr, res->server);
3863 out:
3864         return status;
3865
3866 }
3867
3868 /*
3869  * Encode an SETACL request
3870  */
3871 static int
3872 nfs4_xdr_enc_setacl(struct rpc_rqst *req, __be32 *p, struct nfs_setaclargs *args)
3873 {
3874         struct xdr_stream xdr;
3875         struct compound_hdr hdr = {
3876                 .nops   = 2,
3877         };
3878         int status;
3879
3880         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
3881         encode_compound_hdr(&xdr, &hdr);
3882         status = encode_putfh(&xdr, args->fh);
3883         if (status)
3884                 goto out;
3885         status = encode_setacl(&xdr, args);
3886 out:
3887         return status;
3888 }
3889 /*
3890  * Decode SETACL response
3891  */
3892 static int
3893 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, __be32 *p, void *res)
3894 {
3895         struct xdr_stream xdr;
3896         struct compound_hdr hdr;
3897         int status;
3898
3899         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3900         status = decode_compound_hdr(&xdr, &hdr);
3901         if (status)
3902                 goto out;
3903         status = decode_putfh(&xdr);
3904         if (status)
3905                 goto out;
3906         status = decode_setattr(&xdr, res);
3907 out:
3908         return status;
3909 }
3910
3911 /*
3912  * Decode GETACL response
3913  */
3914 static int
3915 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, __be32 *p, size_t *acl_len)
3916 {
3917         struct xdr_stream xdr;
3918         struct compound_hdr hdr;
3919         int status;
3920
3921         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3922         status = decode_compound_hdr(&xdr, &hdr);
3923         if (status)
3924                 goto out;
3925         status = decode_putfh(&xdr);
3926         if (status)
3927                 goto out;
3928         status = decode_getacl(&xdr, rqstp, acl_len);
3929
3930 out:
3931         return status;
3932 }
3933
3934 /*
3935  * Decode CLOSE response
3936  */
3937 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
3938 {
3939         struct xdr_stream xdr;
3940         struct compound_hdr hdr;
3941         int status;
3942
3943         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3944         status = decode_compound_hdr(&xdr, &hdr);
3945         if (status)
3946                 goto out;
3947         status = decode_putfh(&xdr);
3948         if (status)
3949                 goto out;
3950         status = decode_close(&xdr, res);
3951         if (status != 0)
3952                 goto out;
3953         /*
3954          * Note: Server may do delete on close for this file
3955          *      in which case the getattr call will fail with
3956          *      an ESTALE error. Shouldn't be a problem,
3957          *      though, since fattr->valid will remain unset.
3958          */
3959         decode_getfattr(&xdr, res->fattr, res->server);
3960 out:
3961         return status;
3962 }
3963
3964 /*
3965  * Decode OPEN response
3966  */
3967 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
3968 {
3969         struct xdr_stream xdr;
3970         struct compound_hdr hdr;
3971         int status;
3972
3973         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3974         status = decode_compound_hdr(&xdr, &hdr);
3975         if (status)
3976                 goto out;
3977         status = decode_putfh(&xdr);
3978         if (status)
3979                 goto out;
3980         status = decode_savefh(&xdr);
3981         if (status)
3982                 goto out;
3983         status = decode_open(&xdr, res);
3984         if (status)
3985                 goto out;
3986         status = decode_getfh(&xdr, &res->fh);
3987         if (status)
3988                 goto out;
3989         if (decode_getfattr(&xdr, res->f_attr, res->server) != 0)
3990                 goto out;
3991         if ((status = decode_restorefh(&xdr)) != 0)
3992                 goto out;
3993         decode_getfattr(&xdr, res->dir_attr, res->server);
3994 out:
3995         return status;
3996 }
3997
3998 /*
3999  * Decode OPEN_CONFIRM response
4000  */
4001 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, __be32 *p, struct nfs_open_confirmres *res)
4002 {
4003         struct xdr_stream xdr;
4004         struct compound_hdr hdr;
4005         int status;
4006
4007         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4008         status = decode_compound_hdr(&xdr, &hdr);
4009         if (status)
4010                 goto out;
4011         status = decode_putfh(&xdr);
4012         if (status)
4013                 goto out;
4014         status = decode_open_confirm(&xdr, res);
4015 out:
4016         return status;
4017 }
4018
4019 /*
4020  * Decode OPEN response
4021  */
4022 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4023 {
4024         struct xdr_stream xdr;
4025         struct compound_hdr hdr;
4026         int status;
4027
4028         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4029         status = decode_compound_hdr(&xdr, &hdr);
4030         if (status)
4031                 goto out;
4032         status = decode_putfh(&xdr);
4033         if (status)
4034                 goto out;
4035         status = decode_open(&xdr, res);
4036         if (status)
4037                 goto out;
4038         decode_getfattr(&xdr, res->f_attr, res->server);
4039 out:
4040         return status;
4041 }
4042
4043 /*
4044  * Decode SETATTR response
4045  */
4046 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_setattrres *res)
4047 {
4048         struct xdr_stream xdr;
4049         struct compound_hdr hdr;
4050         int status;
4051
4052         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4053         status = decode_compound_hdr(&xdr, &hdr);
4054         if (status)
4055                 goto out;
4056         status = decode_putfh(&xdr);
4057         if (status)
4058                 goto out;
4059         status = decode_setattr(&xdr, res);
4060         if (status)
4061                 goto out;
4062         status = decode_getfattr(&xdr, res->fattr, res->server);
4063         if (status == NFS4ERR_DELAY)
4064                 status = 0;
4065 out:
4066         return status;
4067 }
4068
4069 /*
4070  * Decode LOCK response
4071  */
4072 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lock_res *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_lock(&xdr, res);
4086 out:
4087         return status;
4088 }
4089
4090 /*
4091  * Decode LOCKT response
4092  */
4093 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lockt_res *res)
4094 {
4095         struct xdr_stream xdr;
4096         struct compound_hdr hdr;
4097         int status;
4098
4099         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4100         status = decode_compound_hdr(&xdr, &hdr);
4101         if (status)
4102                 goto out;
4103         status = decode_putfh(&xdr);
4104         if (status)
4105                 goto out;
4106         status = decode_lockt(&xdr, res);
4107 out:
4108         return status;
4109 }
4110
4111 /*
4112  * Decode LOCKU response
4113  */
4114 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, __be32 *p, struct nfs_locku_res *res)
4115 {
4116         struct xdr_stream xdr;
4117         struct compound_hdr hdr;
4118         int status;
4119
4120         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4121         status = decode_compound_hdr(&xdr, &hdr);
4122         if (status)
4123                 goto out;
4124         status = decode_putfh(&xdr);
4125         if (status)
4126                 goto out;
4127         status = decode_locku(&xdr, res);
4128 out:
4129         return status;
4130 }
4131
4132 /*
4133  * Decode READLINK response
4134  */
4135 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, __be32 *p, void *res)
4136 {
4137         struct xdr_stream xdr;
4138         struct compound_hdr hdr;
4139         int status;
4140
4141         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4142         status = decode_compound_hdr(&xdr, &hdr);
4143         if (status)
4144                 goto out;
4145         status = decode_putfh(&xdr);
4146         if (status)
4147                 goto out;
4148         status = decode_readlink(&xdr, rqstp);
4149 out:
4150         return status;
4151 }
4152
4153 /*
4154  * Decode READDIR response
4155  */
4156 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_readdir_res *res)
4157 {
4158         struct xdr_stream xdr;
4159         struct compound_hdr hdr;
4160         int status;
4161
4162         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4163         status = decode_compound_hdr(&xdr, &hdr);
4164         if (status)
4165                 goto out;
4166         status = decode_putfh(&xdr);
4167         if (status)
4168                 goto out;
4169         status = decode_readdir(&xdr, rqstp, res);
4170 out:
4171         return status;
4172 }
4173
4174 /*
4175  * Decode Read response
4176  */
4177 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, __be32 *p, struct nfs_readres *res)
4178 {
4179         struct xdr_stream xdr;
4180         struct compound_hdr hdr;
4181         int status;
4182
4183         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4184         status = decode_compound_hdr(&xdr, &hdr);
4185         if (status)
4186                 goto out;
4187         status = decode_putfh(&xdr);
4188         if (status)
4189                 goto out;
4190         status = decode_read(&xdr, rqstp, res);
4191         if (!status)
4192                 status = res->count;
4193 out:
4194         return status;
4195 }
4196
4197 /*
4198  * Decode WRITE response
4199  */
4200 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
4201 {
4202         struct xdr_stream xdr;
4203         struct compound_hdr hdr;
4204         int status;
4205
4206         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4207         status = decode_compound_hdr(&xdr, &hdr);
4208         if (status)
4209                 goto out;
4210         status = decode_putfh(&xdr);
4211         if (status)
4212                 goto out;
4213         status = decode_write(&xdr, res);
4214         if (status)
4215                 goto out;
4216         decode_getfattr(&xdr, res->fattr, res->server);
4217         if (!status)
4218                 status = res->count;
4219 out:
4220         return status;
4221 }
4222
4223 /*
4224  * Decode COMMIT response
4225  */
4226 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
4227 {
4228         struct xdr_stream xdr;
4229         struct compound_hdr hdr;
4230         int status;
4231
4232         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4233         status = decode_compound_hdr(&xdr, &hdr);
4234         if (status)
4235                 goto out;
4236         status = decode_putfh(&xdr);
4237         if (status)
4238                 goto out;
4239         status = decode_commit(&xdr, res);
4240         if (status)
4241                 goto out;
4242         decode_getfattr(&xdr, res->fattr, res->server);
4243 out:
4244         return status;
4245 }
4246
4247 /*
4248  * FSINFO request
4249  */
4250 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
4251 {
4252         struct xdr_stream xdr;
4253         struct compound_hdr hdr;
4254         int status;
4255
4256         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4257         status = decode_compound_hdr(&xdr, &hdr);
4258         if (!status)
4259                 status = decode_putfh(&xdr);
4260         if (!status)
4261                 status = decode_fsinfo(&xdr, fsinfo);
4262         if (!status)
4263                 status = -nfs4_stat_to_errno(hdr.status);
4264         return status;
4265 }
4266
4267 /*
4268  * PATHCONF request
4269  */
4270 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, __be32 *p, struct nfs_pathconf *pathconf)
4271 {
4272         struct xdr_stream xdr;
4273         struct compound_hdr hdr;
4274         int status;
4275
4276         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4277         status = decode_compound_hdr(&xdr, &hdr);
4278         if (!status)
4279                 status = decode_putfh(&xdr);
4280         if (!status)
4281                 status = decode_pathconf(&xdr, pathconf);
4282         return status;
4283 }
4284
4285 /*
4286  * STATFS request
4287  */
4288 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, __be32 *p, struct nfs_fsstat *fsstat)
4289 {
4290         struct xdr_stream xdr;
4291         struct compound_hdr hdr;
4292         int status;
4293
4294         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4295         status = decode_compound_hdr(&xdr, &hdr);
4296         if (!status)
4297                 status = decode_putfh(&xdr);
4298         if (!status)
4299                 status = decode_statfs(&xdr, fsstat);
4300         return status;
4301 }
4302
4303 /*
4304  * GETATTR_BITMAP request
4305  */
4306 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, __be32 *p, struct nfs4_server_caps_res *res)
4307 {
4308         struct xdr_stream xdr;
4309         struct compound_hdr hdr;
4310         int status;
4311
4312         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4313         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
4314                 goto out;
4315         if ((status = decode_putfh(&xdr)) != 0)
4316                 goto out;
4317         status = decode_server_caps(&xdr, res);
4318 out:
4319         return status;
4320 }
4321
4322 /*
4323  * Decode RENEW response
4324  */
4325 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, __be32 *p, void *dummy)
4326 {
4327         struct xdr_stream xdr;
4328         struct compound_hdr hdr;
4329         int status;
4330
4331         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4332         status = decode_compound_hdr(&xdr, &hdr);
4333         if (!status)
4334                 status = decode_renew(&xdr);
4335         return status;
4336 }
4337
4338 /*
4339  * a SETCLIENTID request
4340  */
4341 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, __be32 *p,
4342                 struct nfs_client *clp)
4343 {
4344         struct xdr_stream xdr;
4345         struct compound_hdr hdr;
4346         int status;
4347
4348         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4349         status = decode_compound_hdr(&xdr, &hdr);
4350         if (!status)
4351                 status = decode_setclientid(&xdr, clp);
4352         if (!status)
4353                 status = -nfs4_stat_to_errno(hdr.status);
4354         return status;
4355 }
4356
4357 /*
4358  * a SETCLIENTID_CONFIRM request
4359  */
4360 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
4361 {
4362         struct xdr_stream xdr;
4363         struct compound_hdr hdr;
4364         int status;
4365
4366         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4367         status = decode_compound_hdr(&xdr, &hdr);
4368         if (!status)
4369                 status = decode_setclientid_confirm(&xdr);
4370         if (!status)
4371                 status = decode_putrootfh(&xdr);
4372         if (!status)
4373                 status = decode_fsinfo(&xdr, fsinfo);
4374         if (!status)
4375                 status = -nfs4_stat_to_errno(hdr.status);
4376         return status;
4377 }
4378
4379 /*
4380  * DELEGRETURN request
4381  */
4382 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_delegreturnres *res)
4383 {
4384         struct xdr_stream xdr;
4385         struct compound_hdr hdr;
4386         int status;
4387
4388         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4389         status = decode_compound_hdr(&xdr, &hdr);
4390         if (status != 0)
4391                 goto out;
4392         status = decode_putfh(&xdr);
4393         if (status != 0)
4394                 goto out;
4395         status = decode_delegreturn(&xdr);
4396         decode_getfattr(&xdr, res->fattr, res->server);
4397 out:
4398         return status;
4399 }
4400
4401 /*
4402  * FS_LOCATIONS request
4403  */
4404 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations *res)
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 != 0)
4413                 goto out;
4414         if ((status = decode_putfh(&xdr)) != 0)
4415                 goto out;
4416         if ((status = decode_lookup(&xdr)) != 0)
4417                 goto out;
4418         xdr_enter_page(&xdr, PAGE_SIZE);
4419         status = decode_getfattr(&xdr, &res->fattr, res->server);
4420 out:
4421         return status;
4422 }
4423
4424 __be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus)
4425 {
4426         uint32_t bitmap[2] = {0};
4427         uint32_t len;
4428
4429         if (!*p++) {
4430                 if (!*p)
4431                         return ERR_PTR(-EAGAIN);
4432                 entry->eof = 1;
4433                 return ERR_PTR(-EBADCOOKIE);
4434         }
4435
4436         entry->prev_cookie = entry->cookie;
4437         p = xdr_decode_hyper(p, &entry->cookie);
4438         entry->len = ntohl(*p++);
4439         entry->name = (const char *) p;
4440         p += XDR_QUADLEN(entry->len);
4441
4442         /*
4443          * In case the server doesn't return an inode number,
4444          * we fake one here.  (We don't use inode number 0,
4445          * since glibc seems to choke on it...)
4446          */
4447         entry->ino = 1;
4448
4449         len = ntohl(*p++);              /* bitmap length */
4450         if (len-- > 0) {
4451                 bitmap[0] = ntohl(*p++);
4452                 if (len-- > 0) {
4453                         bitmap[1] = ntohl(*p++);
4454                         p += len;
4455                 }
4456         }
4457         len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */
4458         if (len > 0) {
4459                 if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) {
4460                         bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
4461                         /* Ignore the return value of rdattr_error for now */
4462                         p++;
4463                         len--;
4464                 }
4465                 if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
4466                         xdr_decode_hyper(p, &entry->ino);
4467                 else if (bitmap[0] == FATTR4_WORD0_FILEID)
4468                         xdr_decode_hyper(p, &entry->ino);
4469                 p += len;
4470         }
4471
4472         entry->eof = !p[0] && p[1];
4473         return p;
4474 }
4475
4476 /*
4477  * We need to translate between nfs status return values and
4478  * the local errno values which may not be the same.
4479  */
4480 static struct {
4481         int stat;
4482         int errno;
4483 } nfs_errtbl[] = {
4484         { NFS4_OK,              0               },
4485         { NFS4ERR_PERM,         EPERM           },
4486         { NFS4ERR_NOENT,        ENOENT          },
4487         { NFS4ERR_IO,           errno_NFSERR_IO },
4488         { NFS4ERR_NXIO,         ENXIO           },
4489         { NFS4ERR_ACCESS,       EACCES          },
4490         { NFS4ERR_EXIST,        EEXIST          },
4491         { NFS4ERR_XDEV,         EXDEV           },
4492         { NFS4ERR_NOTDIR,       ENOTDIR         },
4493         { NFS4ERR_ISDIR,        EISDIR          },
4494         { NFS4ERR_INVAL,        EINVAL          },
4495         { NFS4ERR_FBIG,         EFBIG           },
4496         { NFS4ERR_NOSPC,        ENOSPC          },
4497         { NFS4ERR_ROFS,         EROFS           },
4498         { NFS4ERR_MLINK,        EMLINK          },
4499         { NFS4ERR_NAMETOOLONG,  ENAMETOOLONG    },
4500         { NFS4ERR_NOTEMPTY,     ENOTEMPTY       },
4501         { NFS4ERR_DQUOT,        EDQUOT          },
4502         { NFS4ERR_STALE,        ESTALE          },
4503         { NFS4ERR_BADHANDLE,    EBADHANDLE      },
4504         { NFS4ERR_BADOWNER,     EINVAL          },
4505         { NFS4ERR_BADNAME,      EINVAL          },
4506         { NFS4ERR_BAD_COOKIE,   EBADCOOKIE      },
4507         { NFS4ERR_NOTSUPP,      ENOTSUPP        },
4508         { NFS4ERR_TOOSMALL,     ETOOSMALL       },
4509         { NFS4ERR_SERVERFAULT,  ESERVERFAULT    },
4510         { NFS4ERR_BADTYPE,      EBADTYPE        },
4511         { NFS4ERR_LOCKED,       EAGAIN          },
4512         { NFS4ERR_RESOURCE,     EREMOTEIO       },
4513         { NFS4ERR_SYMLINK,      ELOOP           },
4514         { NFS4ERR_OP_ILLEGAL,   EOPNOTSUPP      },
4515         { NFS4ERR_DEADLOCK,     EDEADLK         },
4516         { NFS4ERR_WRONGSEC,     EPERM           }, /* FIXME: this needs
4517                                                     * to be handled by a
4518                                                     * middle-layer.
4519                                                     */
4520         { -1,                   EIO             }
4521 };
4522
4523 /*
4524  * Convert an NFS error code to a local one.
4525  * This one is used jointly by NFSv2 and NFSv3.
4526  */
4527 static int
4528 nfs4_stat_to_errno(int stat)
4529 {
4530         int i;
4531         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
4532                 if (nfs_errtbl[i].stat == stat)
4533                         return nfs_errtbl[i].errno;
4534         }
4535         if (stat <= 10000 || stat > 10100) {
4536                 /* The server is looney tunes. */
4537                 return ESERVERFAULT;
4538         }
4539         /* If we cannot translate the error, the recovery routines should
4540          * handle it.
4541          * Note: remaining NFSv4 error codes have values > 10000, so should
4542          * not conflict with native Linux error codes.
4543          */
4544         return stat;
4545 }
4546
4547 #ifndef MAX
4548 # define MAX(a, b)      (((a) > (b))? (a) : (b))
4549 #endif
4550
4551 #define PROC(proc, argtype, restype)                            \
4552 [NFSPROC4_CLNT_##proc] = {                                      \
4553         .p_proc   = NFSPROC4_COMPOUND,                          \
4554         .p_encode = (kxdrproc_t) nfs4_xdr_##argtype,            \
4555         .p_decode = (kxdrproc_t) nfs4_xdr_##restype,            \
4556         .p_bufsiz = MAX(NFS4_##argtype##_sz,NFS4_##restype##_sz) << 2,  \
4557         .p_statidx = NFSPROC4_CLNT_##proc,                      \
4558         .p_name   = #proc,                                      \
4559     }
4560
4561 struct rpc_procinfo     nfs4_procedures[] = {
4562   PROC(READ,            enc_read,       dec_read),
4563   PROC(WRITE,           enc_write,      dec_write),
4564   PROC(COMMIT,          enc_commit,     dec_commit),
4565   PROC(OPEN,            enc_open,       dec_open),
4566   PROC(OPEN_CONFIRM,    enc_open_confirm,       dec_open_confirm),
4567   PROC(OPEN_NOATTR,     enc_open_noattr,        dec_open_noattr),
4568   PROC(OPEN_DOWNGRADE,  enc_open_downgrade,     dec_open_downgrade),
4569   PROC(CLOSE,           enc_close,      dec_close),
4570   PROC(SETATTR,         enc_setattr,    dec_setattr),
4571   PROC(FSINFO,          enc_fsinfo,     dec_fsinfo),
4572   PROC(RENEW,           enc_renew,      dec_renew),
4573   PROC(SETCLIENTID,     enc_setclientid,        dec_setclientid),
4574   PROC(SETCLIENTID_CONFIRM,     enc_setclientid_confirm,        dec_setclientid_confirm),
4575   PROC(LOCK,            enc_lock,       dec_lock),
4576   PROC(LOCKT,           enc_lockt,      dec_lockt),
4577   PROC(LOCKU,           enc_locku,      dec_locku),
4578   PROC(ACCESS,          enc_access,     dec_access),
4579   PROC(GETATTR,         enc_getattr,    dec_getattr),
4580   PROC(LOOKUP,          enc_lookup,     dec_lookup),
4581   PROC(LOOKUP_ROOT,     enc_lookup_root,        dec_lookup_root),
4582   PROC(REMOVE,          enc_remove,     dec_remove),
4583   PROC(RENAME,          enc_rename,     dec_rename),
4584   PROC(LINK,            enc_link,       dec_link),
4585   PROC(SYMLINK,         enc_symlink,    dec_symlink),
4586   PROC(CREATE,          enc_create,     dec_create),
4587   PROC(PATHCONF,        enc_pathconf,   dec_pathconf),
4588   PROC(STATFS,          enc_statfs,     dec_statfs),
4589   PROC(READLINK,        enc_readlink,   dec_readlink),
4590   PROC(READDIR,         enc_readdir,    dec_readdir),
4591   PROC(SERVER_CAPS,     enc_server_caps, dec_server_caps),
4592   PROC(DELEGRETURN,     enc_delegreturn, dec_delegreturn),
4593   PROC(GETACL,          enc_getacl,     dec_getacl),
4594   PROC(SETACL,          enc_setacl,     dec_setacl),
4595   PROC(FS_LOCATIONS,    enc_fs_locations, dec_fs_locations),
4596 };
4597
4598 struct rpc_version              nfs_version4 = {
4599         .number                 = 4,
4600         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
4601         .procs                  = nfs4_procedures
4602 };
4603
4604 /*
4605  * Local variables:
4606  *  c-basic-offset: 8
4607  * End:
4608  */