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   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 nfs_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_fsinfo_maxsz     (op_encode_hdr_maxsz + 2)
  99 #define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + 11)
 100 #define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 101 #define decode_renew_maxsz      (op_decode_hdr_maxsz)
 102 #define encode_setclientid_maxsz \
 103                                 (op_encode_hdr_maxsz + \
 104                                 4 /*server->ip_addr*/ + \
 105                                 1 /*Netid*/ + \
 106                                 6 /*uaddr*/ + \
 107                                 6 + (NFS4_VERIFIER_SIZE >> 2))
 108 #define decode_setclientid_maxsz \
 109                                 (op_decode_hdr_maxsz + \
 110                                 2 + \
 111                                 1024) /* large value for CLID_INUSE */
 112 #define encode_setclientid_confirm_maxsz \
 113                                 (op_encode_hdr_maxsz + \
 114                                 3 + (NFS4_VERIFIER_SIZE >> 2))
 115 #define decode_setclientid_confirm_maxsz \
 116                                 (op_decode_hdr_maxsz)
 117 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + \
 118                                 1 + ((3 + NFS4_FHSIZE) >> 2))
 119 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 120                                 nfs4_name_maxsz)
 121 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 122                                 2 * nfs4_name_maxsz)
 123 #define decode_rename_maxsz     (op_decode_hdr_maxsz + 5 + 5)
 124 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 125                                 nfs4_name_maxsz)
 126 #define decode_link_maxsz       (op_decode_hdr_maxsz + 5)
 127 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 128                                 1 + nfs4_name_maxsz + \
 129                                 nfs4_path_maxsz + \
 130                                 nfs4_fattr_maxsz)
 131 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 132 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 133                                 2 + nfs4_name_maxsz + \
 134                                 nfs4_fattr_maxsz)
 135 #define decode_create_maxsz     (op_decode_hdr_maxsz + 8)
 136 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 137 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 138 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 139 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 140 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 141                                 encode_putfh_maxsz + \
 142                                 op_encode_hdr_maxsz + 7)
 143 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 144                                 decode_putfh_maxsz + \
 145                                 op_decode_hdr_maxsz + 2)
 146 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 147                                 encode_putfh_maxsz + \
 148                                 op_encode_hdr_maxsz)
 149 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 150                                 decode_putfh_maxsz + \
 151                                 op_decode_hdr_maxsz)
 152 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 153                                 encode_putfh_maxsz + \
 154                                 op_encode_hdr_maxsz + 9)
 155 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 156                                 decode_putfh_maxsz + \
 157                                 op_decode_hdr_maxsz + 2)
 158 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 159                                 encode_putfh_maxsz + \
 160                                 op_encode_hdr_maxsz + 8)
 161 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 162                                 decode_putfh_maxsz + \
 163                                 op_decode_hdr_maxsz + 4)
 164 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 165                                 encode_putfh_maxsz + \
 166                                 op_encode_hdr_maxsz + 3)
 167 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 168                                 decode_putfh_maxsz + \
 169                                 op_decode_hdr_maxsz + 2)
 170 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 171                                 encode_putfh_maxsz + \
 172                                 op_encode_hdr_maxsz + \
 173                                 13 + 3 + 2 + 64 + \
 174                                 encode_getattr_maxsz + \
 175                                 encode_getfh_maxsz)
 176 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 177                                 decode_putfh_maxsz + \
 178                                 op_decode_hdr_maxsz + 4 + 5 + 2 + 3 + \
 179                                 decode_getattr_maxsz + \
 180                                 decode_getfh_maxsz)
 181 #define NFS4_enc_open_confirm_sz      \
 182                                 (compound_encode_hdr_maxsz + \
 183                                 encode_putfh_maxsz + \
 184                                 op_encode_hdr_maxsz + 5)
 185 #define NFS4_dec_open_confirm_sz        (compound_decode_hdr_maxsz + \
 186                                         decode_putfh_maxsz + \
 187                                         op_decode_hdr_maxsz + 4)
 188 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 189                                         encode_putfh_maxsz + \
 190                                         op_encode_hdr_maxsz + \
 191                                         11)
 192 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 193                                         decode_putfh_maxsz + \
 194                                         op_decode_hdr_maxsz + \
 195                                         4 + 5 + 2 + 3)
 196 #define NFS4_enc_open_downgrade_sz \
 197                                 (compound_encode_hdr_maxsz + \
 198                                 encode_putfh_maxsz + \
 199                                 op_encode_hdr_maxsz + 7)
 200 #define NFS4_dec_open_downgrade_sz \
 201                                 (compound_decode_hdr_maxsz + \
 202                                 decode_putfh_maxsz + \
 203                                 op_decode_hdr_maxsz + 4)
 204 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 205                                 encode_putfh_maxsz + \
 206                                 op_encode_hdr_maxsz + 5)
 207 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 208                                 decode_putfh_maxsz + \
 209                                 op_decode_hdr_maxsz + 4)
 210 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 211                                 encode_putfh_maxsz + \
 212                                 op_encode_hdr_maxsz + 4 + \
 213                                 nfs4_fattr_maxsz + \
 214                                 encode_getattr_maxsz)
 215 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 216                                 decode_putfh_maxsz + \
 217                                 op_decode_hdr_maxsz + 3)
 218 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 219                                 encode_putfh_maxsz + \
 220                                 encode_fsinfo_maxsz)
 221 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 222                                 decode_putfh_maxsz + \
 223                                 decode_fsinfo_maxsz)
 224 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 225                                 encode_renew_maxsz)
 226 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 227                                 decode_renew_maxsz)
 228 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 229                                 encode_setclientid_maxsz)
 230 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 231                                 decode_setclientid_maxsz)
 232 #define NFS4_enc_setclientid_confirm_sz \
 233                                 (compound_encode_hdr_maxsz + \
 234                                 encode_setclientid_confirm_maxsz + \
 235                                 encode_putrootfh_maxsz + \
 236                                 encode_fsinfo_maxsz)
 237 #define NFS4_dec_setclientid_confirm_sz \
 238                                 (compound_decode_hdr_maxsz + \
 239                                 decode_setclientid_confirm_maxsz + \
 240                                 decode_putrootfh_maxsz + \
 241                                 decode_fsinfo_maxsz)
 242 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 243                                 encode_putfh_maxsz + \
 244                                 encode_getattr_maxsz + \
 245                                 op_encode_hdr_maxsz + \
 246                                 1 + 1 + 2 + 2 + \
 247                                 1 + 4 + 1 + 2 + \
 248                                 owner_id_maxsz)
 249 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 250                                 decode_putfh_maxsz + \
 251                                 decode_getattr_maxsz + \
 252                                 op_decode_hdr_maxsz + \
 253                                 2 + 2 + 1 + 2 + \
 254                                 owner_id_maxsz)
 255 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 256                                 encode_putfh_maxsz + \
 257                                 encode_getattr_maxsz + \
 258                                 op_encode_hdr_maxsz + \
 259                                 1 + 2 + 2 + 2 + \
 260                                 owner_id_maxsz)
 261 #define NFS4_dec_lockt_sz       (NFS4_dec_lock_sz)
 262 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 263                                 encode_putfh_maxsz + \
 264                                 encode_getattr_maxsz + \
 265                                 op_encode_hdr_maxsz + \
 266                                 1 + 1 + 4 + 2 + 2)
 267 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 268                                 decode_putfh_maxsz + \
 269                                 decode_getattr_maxsz + \
 270                                 op_decode_hdr_maxsz + 4)
 271 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 272                                 encode_putfh_maxsz + \
 273                                 op_encode_hdr_maxsz + 1)
 274 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 275                                 decode_putfh_maxsz + \
 276                                 op_decode_hdr_maxsz + 2)
 277 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 278                                 encode_putfh_maxsz + \
 279                                 encode_getattr_maxsz)
 280 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 281                                 decode_putfh_maxsz + \
 282                                 decode_getattr_maxsz)
 283 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 284                                 encode_putfh_maxsz + \
 285                                 encode_lookup_maxsz + \
 286                                 encode_getattr_maxsz + \
 287                                 encode_getfh_maxsz)
 288 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 289                                 decode_putfh_maxsz + \
 290                                 op_decode_hdr_maxsz + \
 291                                 decode_getattr_maxsz + \
 292                                 decode_getfh_maxsz)
 293 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 294                                 encode_putrootfh_maxsz + \
 295                                 encode_getattr_maxsz + \
 296                                 encode_getfh_maxsz)
 297 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 298                                 decode_putrootfh_maxsz + \
 299                                 decode_getattr_maxsz + \
 300                                 decode_getfh_maxsz)
 301 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 302                                 encode_putfh_maxsz + \
 303                                 encode_remove_maxsz)
 304 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 305                                 decode_putfh_maxsz + \
 306                                 op_decode_hdr_maxsz + 5)
 307 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 308                                 encode_putfh_maxsz + \
 309                                 encode_savefh_maxsz + \
 310                                 encode_putfh_maxsz + \
 311                                 encode_rename_maxsz)
 312 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 313                                 decode_putfh_maxsz + \
 314                                 decode_savefh_maxsz + \
 315                                 decode_putfh_maxsz + \
 316                                 decode_rename_maxsz)
 317 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 318                                 encode_putfh_maxsz + \
 319                                 encode_savefh_maxsz + \
 320                                 encode_putfh_maxsz + \
 321                                 encode_link_maxsz)
 322 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 323                                 decode_putfh_maxsz + \
 324                                 decode_savefh_maxsz + \
 325                                 decode_putfh_maxsz + \
 326                                 decode_link_maxsz)
 327 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 328                                 encode_putfh_maxsz + \
 329                                 encode_symlink_maxsz + \
 330                                 encode_getattr_maxsz + \
 331                                 encode_getfh_maxsz)
 332 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 333                                 decode_putfh_maxsz + \
 334                                 decode_symlink_maxsz + \
 335                                 decode_getattr_maxsz + \
 336                                 decode_getfh_maxsz)
 337 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 338                                 encode_putfh_maxsz + \
 339                                 encode_create_maxsz + \
 340                                 encode_getattr_maxsz + \
 341                                 encode_getfh_maxsz)
 342 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 343                                 decode_putfh_maxsz + \
 344                                 decode_create_maxsz + \
 345                                 decode_getattr_maxsz + \
 346                                 decode_getfh_maxsz)
 347 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 348                                 encode_putfh_maxsz + \
 349                                 encode_getattr_maxsz)
 350 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 351                                 decode_putfh_maxsz + \
 352                                 decode_getattr_maxsz)
 353 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 354                                 encode_putfh_maxsz + \
 355                                 encode_getattr_maxsz)
 356 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 357                                 decode_putfh_maxsz + \
 358                                 op_decode_hdr_maxsz + 12)
 359 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 360                                 encode_getattr_maxsz)
 361 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 362                                 decode_getattr_maxsz)
 363 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 364                                 encode_putfh_maxsz + \
 365                                 encode_delegreturn_maxsz)
 366 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 367                                 decode_delegreturn_maxsz)
 368 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 369                                 encode_putfh_maxsz + \
 370                                 encode_getattr_maxsz)
 371 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 372                                 decode_putfh_maxsz + \
 373                                 op_decode_hdr_maxsz + \
 374                                 nfs4_fattr_bitmap_maxsz + 1)
 375 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 376                                 encode_putfh_maxsz + \
 377                                 op_encode_hdr_maxsz + 4 + \
 378                                 nfs4_fattr_bitmap_maxsz + 1)
 379 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 380                                 decode_putfh_maxsz + \
 381                                 op_decode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
 382
 383 static struct {
 384         unsigned int    mode;
 385         unsigned int    nfs2type;
 386 } nfs_type2fmt[] = {
 387         { 0,            NFNON        },
 388         { S_IFREG,      NFREG        },
 389         { S_IFDIR,      NFDIR        },
 390         { S_IFBLK,      NFBLK        },
 391         { S_IFCHR,      NFCHR        },
 392         { S_IFLNK,      NFLNK        },
 393         { S_IFSOCK,     NFSOCK       },
 394         { S_IFIFO,      NFFIFO       },
 395         { 0,            NFNON        },
 396         { 0,            NFNON        },
 397 };
 398
 399 struct compound_hdr {
 400         int32_t         status;
 401         uint32_t        nops;
 402         uint32_t        taglen;
 403         char *          tag;
 404 };
 405
 406 /*
 407  * START OF "GENERIC" ENCODE ROUTINES.
 408  *   These may look a little ugly since they are imported from a "generic"
 409  * set of XDR encode/decode routines which are intended to be shared by
 410  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
 411  *
 412  * If the pain of reading these is too great, it should be a straightforward
 413  * task to translate them into Linux-specific versions which are more
 414  * consistent with the style used in NFSv2/v3...
 415  */
 416 #define WRITE32(n)               *p++ = htonl(n)
 417 #define WRITE64(n)               do {                           \
 418         *p++ = htonl((uint32_t)((n) >> 32));                            \
 419         *p++ = htonl((uint32_t)(n));                                    \
 420 } while (0)
 421 #define WRITEMEM(ptr,nbytes)     do {                           \
 422         p = xdr_encode_opaque_fixed(p, ptr, nbytes);            \
 423 } while (0)
 424
 425 #define RESERVE_SPACE(nbytes)   do {                            \
 426         p = xdr_reserve_space(xdr, nbytes);                     \
 427         if (!p) printk("RESERVE_SPACE(%d) failed in function %s\n", (int) (nbytes), __FUNCTION__); \
 428         BUG_ON(!p);                                             \
 429 } while (0)
 430
 431 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 432 {
 433         uint32_t *p;
 434
 435         p = xdr_reserve_space(xdr, 4 + len);
 436         BUG_ON(p == NULL);
 437         xdr_encode_opaque(p, str, len);
 438 }
 439
 440 static int encode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
 441 {
 442         uint32_t *p;
 443
 444         dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
 445         BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
 446         RESERVE_SPACE(12+(XDR_QUADLEN(hdr->taglen)<<2));
 447         WRITE32(hdr->taglen);
 448         WRITEMEM(hdr->tag, hdr->taglen);
 449         WRITE32(NFS4_MINOR_VERSION);
 450         WRITE32(hdr->nops);
 451         return 0;
 452 }
 453
 454 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 455 {
 456         uint32_t *p;
 457
 458         p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
 459         BUG_ON(p == NULL);
 460         xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
 461 }
 462
 463 static int encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
 464 {
 465         char owner_name[IDMAP_NAMESZ];
 466         char owner_group[IDMAP_NAMESZ];
 467         int owner_namelen = 0;
 468         int owner_grouplen = 0;
 469         uint32_t *p;
 470         uint32_t *q;
 471         int len;
 472         uint32_t bmval0 = 0;
 473         uint32_t bmval1 = 0;
 474         int status;
 475
 476         /*
 477          * We reserve enough space to write the entire attribute buffer at once.
 478          * In the worst-case, this would be
 479          *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
 480          *          = 36 bytes, plus any contribution from variable-length fields
 481          *            such as owner/group.
 482          */
 483         len = 16;
 484
 485         /* Sigh */
 486         if (iap->ia_valid & ATTR_SIZE)
 487                 len += 8;
 488         if (iap->ia_valid & ATTR_MODE)
 489                 len += 4;
 490         if (iap->ia_valid & ATTR_UID) {
 491                 owner_namelen = nfs_map_uid_to_name(server->nfs4_state, iap->ia_uid, owner_name);
 492                 if (owner_namelen < 0) {
 493                         printk(KERN_WARNING "nfs: couldn't resolve uid %d to string\n",
 494                                iap->ia_uid);
 495                         /* XXX */
 496                         strcpy(owner_name, "nobody");
 497                         owner_namelen = sizeof("nobody") - 1;
 498                         /* goto out; */
 499                 }
 500                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
 501         }
 502         if (iap->ia_valid & ATTR_GID) {
 503                 owner_grouplen = nfs_map_gid_to_group(server->nfs4_state, iap->ia_gid, owner_group);
 504                 if (owner_grouplen < 0) {
 505                         printk(KERN_WARNING "nfs4: couldn't resolve gid %d to string\n",
 506                                iap->ia_gid);
 507                         strcpy(owner_group, "nobody");
 508                         owner_grouplen = sizeof("nobody") - 1;
 509                         /* goto out; */
 510                 }
 511                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
 512         }
 513         if (iap->ia_valid & ATTR_ATIME_SET)
 514                 len += 16;
 515         else if (iap->ia_valid & ATTR_ATIME)
 516                 len += 4;
 517         if (iap->ia_valid & ATTR_MTIME_SET)
 518                 len += 16;
 519         else if (iap->ia_valid & ATTR_MTIME)
 520                 len += 4;
 521         RESERVE_SPACE(len);
 522
 523         /*
 524          * We write the bitmap length now, but leave the bitmap and the attribute
 525          * buffer length to be backfilled at the end of this routine.
 526          */
 527         WRITE32(2);
 528         q = p;
 529         p += 3;
 530
 531         if (iap->ia_valid & ATTR_SIZE) {
 532                 bmval0 |= FATTR4_WORD0_SIZE;
 533                 WRITE64(iap->ia_size);
 534         }
 535         if (iap->ia_valid & ATTR_MODE) {
 536                 bmval1 |= FATTR4_WORD1_MODE;
 537                 WRITE32(iap->ia_mode);
 538         }
 539         if (iap->ia_valid & ATTR_UID) {
 540                 bmval1 |= FATTR4_WORD1_OWNER;
 541                 WRITE32(owner_namelen);
 542                 WRITEMEM(owner_name, owner_namelen);
 543         }
 544         if (iap->ia_valid & ATTR_GID) {
 545                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
 546                 WRITE32(owner_grouplen);
 547                 WRITEMEM(owner_group, owner_grouplen);
 548         }
 549         if (iap->ia_valid & ATTR_ATIME_SET) {
 550                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 551                 WRITE32(NFS4_SET_TO_CLIENT_TIME);
 552                 WRITE32(0);
 553                 WRITE32(iap->ia_mtime.tv_sec);
 554                 WRITE32(iap->ia_mtime.tv_nsec);
 555         }
 556         else if (iap->ia_valid & ATTR_ATIME) {
 557                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 558                 WRITE32(NFS4_SET_TO_SERVER_TIME);
 559         }
 560         if (iap->ia_valid & ATTR_MTIME_SET) {
 561                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 562                 WRITE32(NFS4_SET_TO_CLIENT_TIME);
 563                 WRITE32(0);
 564                 WRITE32(iap->ia_mtime.tv_sec);
 565                 WRITE32(iap->ia_mtime.tv_nsec);
 566         }
 567         else if (iap->ia_valid & ATTR_MTIME) {
 568                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 569                 WRITE32(NFS4_SET_TO_SERVER_TIME);
 570         }
 571
 572         /*
 573          * Now we backfill the bitmap and the attribute buffer length.
 574          */
 575         if (len != ((char *)p - (char *)q) + 4) {
 576                 printk ("encode_attr: Attr length calculation error! %u != %Zu\n",
 577                                 len, ((char *)p - (char *)q) + 4);
 578                 BUG();
 579         }
 580         len = (char *)p - (char *)q - 12;
 581         *q++ = htonl(bmval0);
 582         *q++ = htonl(bmval1);
 583         *q++ = htonl(len);
 584
 585         status = 0;
 586 /* out: */
 587         return status;
 588 }
 589
 590 static int encode_access(struct xdr_stream *xdr, u32 access)
 591 {
 592         uint32_t *p;
 593
 594         RESERVE_SPACE(8);
 595         WRITE32(OP_ACCESS);
 596         WRITE32(access);
 597
 598         return 0;
 599 }
 600
 601 static int encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg)
 602 {
 603         uint32_t *p;
 604
 605         RESERVE_SPACE(8+sizeof(arg->stateid->data));
 606         WRITE32(OP_CLOSE);
 607         WRITE32(arg->seqid->sequence->counter);
 608         WRITEMEM(arg->stateid->data, sizeof(arg->stateid->data));
 609
 610         return 0;
 611 }
 612
 613 static int encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args)
 614 {
 615         uint32_t *p;
 616
 617         RESERVE_SPACE(16);
 618         WRITE32(OP_COMMIT);
 619         WRITE64(args->offset);
 620         WRITE32(args->count);
 621
 622         return 0;
 623 }
 624
 625 static int encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create)
 626 {
 627         uint32_t *p;
 628
 629         RESERVE_SPACE(8);
 630         WRITE32(OP_CREATE);
 631         WRITE32(create->ftype);
 632
 633         switch (create->ftype) {
 634         case NF4LNK:
 635                 RESERVE_SPACE(4 + create->u.symlink->len);
 636                 WRITE32(create->u.symlink->len);
 637                 WRITEMEM(create->u.symlink->name, create->u.symlink->len);
 638                 break;
 639
 640         case NF4BLK: case NF4CHR:
 641                 RESERVE_SPACE(8);
 642                 WRITE32(create->u.device.specdata1);
 643                 WRITE32(create->u.device.specdata2);
 644                 break;
 645
 646         default:
 647                 break;
 648         }
 649
 650         RESERVE_SPACE(4 + create->name->len);
 651         WRITE32(create->name->len);
 652         WRITEMEM(create->name->name, create->name->len);
 653
 654         return encode_attrs(xdr, create->attrs, create->server);
 655 }
 656
 657 static int encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap)
 658 {
 659         uint32_t *p;
 660
 661         RESERVE_SPACE(12);
 662         WRITE32(OP_GETATTR);
 663         WRITE32(1);
 664         WRITE32(bitmap);
 665         return 0;
 666 }
 667
 668 static int encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1)
 669 {
 670         uint32_t *p;
 671
 672         RESERVE_SPACE(16);
 673         WRITE32(OP_GETATTR);
 674         WRITE32(2);
 675         WRITE32(bm0);
 676         WRITE32(bm1);
 677         return 0;
 678 }
 679
 680 static int encode_getfattr(struct xdr_stream *xdr, const u32* bitmask)
 681 {
 682         return encode_getattr_two(xdr,
 683                         bitmask[0] & nfs4_fattr_bitmap[0],
 684                         bitmask[1] & nfs4_fattr_bitmap[1]);
 685 }
 686
 687 static int encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask)
 688 {
 689         return encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
 690                         bitmask[1] & nfs4_fsinfo_bitmap[1]);
 691 }
 692
 693 static int encode_getfh(struct xdr_stream *xdr)
 694 {
 695         uint32_t *p;
 696
 697         RESERVE_SPACE(4);
 698         WRITE32(OP_GETFH);
 699
 700         return 0;
 701 }
 702
 703 static int encode_link(struct xdr_stream *xdr, const struct qstr *name)
 704 {
 705         uint32_t *p;
 706
 707         RESERVE_SPACE(8 + name->len);
 708         WRITE32(OP_LINK);
 709         WRITE32(name->len);
 710         WRITEMEM(name->name, name->len);
 711
 712         return 0;
 713 }
 714
 715 /*
 716  * opcode,type,reclaim,offset,length,new_lock_owner = 32
 717  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
 718  */
 719 static int encode_lock(struct xdr_stream *xdr, const struct nfs_lockargs *arg)
 720 {
 721         uint32_t *p;
 722         struct nfs_lock_opargs *opargs = arg->u.lock;
 723
 724         RESERVE_SPACE(32);
 725         WRITE32(OP_LOCK);
 726         WRITE32(arg->type);
 727         WRITE32(opargs->reclaim);
 728         WRITE64(arg->offset);
 729         WRITE64(arg->length);
 730         WRITE32(opargs->new_lock_owner);
 731         if (opargs->new_lock_owner){
 732                 RESERVE_SPACE(40);
 733                 WRITE32(opargs->open_seqid->sequence->counter);
 734                 WRITEMEM(opargs->open_stateid->data, sizeof(opargs->open_stateid->data));
 735                 WRITE32(opargs->lock_seqid->sequence->counter);
 736                 WRITE64(opargs->lock_owner.clientid);
 737                 WRITE32(4);
 738                 WRITE32(opargs->lock_owner.id);
 739         }
 740         else {
 741                 RESERVE_SPACE(20);
 742                 WRITEMEM(opargs->lock_stateid->data, sizeof(opargs->lock_stateid->data));
 743                 WRITE32(opargs->lock_seqid->sequence->counter);
 744         }
 745
 746         return 0;
 747 }
 748
 749 static int encode_lockt(struct xdr_stream *xdr, const struct nfs_lockargs *arg)
 750 {
 751         uint32_t *p;
 752         struct nfs_lowner *opargs = arg->u.lockt;
 753
 754         RESERVE_SPACE(40);
 755         WRITE32(OP_LOCKT);
 756         WRITE32(arg->type);
 757         WRITE64(arg->offset);
 758         WRITE64(arg->length);
 759         WRITE64(opargs->clientid);
 760         WRITE32(4);
 761         WRITE32(opargs->id);
 762
 763         return 0;
 764 }
 765
 766 static int encode_locku(struct xdr_stream *xdr, const struct nfs_lockargs *arg)
 767 {
 768         uint32_t *p;
 769         struct nfs_locku_opargs *opargs = arg->u.locku;
 770
 771         RESERVE_SPACE(44);
 772         WRITE32(OP_LOCKU);
 773         WRITE32(arg->type);
 774         WRITE32(opargs->seqid->sequence->counter);
 775         WRITEMEM(opargs->stateid->data, sizeof(opargs->stateid->data));
 776         WRITE64(arg->offset);
 777         WRITE64(arg->length);
 778
 779         return 0;
 780 }
 781
 782 static int encode_lookup(struct xdr_stream *xdr, const struct qstr *name)
 783 {
 784         int len = name->len;
 785         uint32_t *p;
 786
 787         RESERVE_SPACE(8 + len);
 788         WRITE32(OP_LOOKUP);
 789         WRITE32(len);
 790         WRITEMEM(name->name, len);
 791
 792         return 0;
 793 }
 794
 795 static void encode_share_access(struct xdr_stream *xdr, int open_flags)
 796 {
 797         uint32_t *p;
 798
 799         RESERVE_SPACE(8);
 800         switch (open_flags & (FMODE_READ|FMODE_WRITE)) {
 801                 case FMODE_READ:
 802                         WRITE32(NFS4_SHARE_ACCESS_READ);
 803                         break;
 804                 case FMODE_WRITE:
 805                         WRITE32(NFS4_SHARE_ACCESS_WRITE);
 806                         break;
 807                 case FMODE_READ|FMODE_WRITE:
 808                         WRITE32(NFS4_SHARE_ACCESS_BOTH);
 809                         break;
 810                 default:
 811                         BUG();
 812         }
 813         WRITE32(0);             /* for linux, share_deny = 0 always */
 814 }
 815
 816 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
 817 {
 818         uint32_t *p;
 819  /*
 820  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
 821  * owner 4 = 32
 822  */
 823         RESERVE_SPACE(8);
 824         WRITE32(OP_OPEN);
 825         WRITE32(arg->seqid->sequence->counter);
 826         encode_share_access(xdr, arg->open_flags);
 827         RESERVE_SPACE(16);
 828         WRITE64(arg->clientid);
 829         WRITE32(4);
 830         WRITE32(arg->id);
 831 }
 832
 833 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
 834 {
 835         uint32_t *p;
 836
 837         RESERVE_SPACE(4);
 838         switch(arg->open_flags & O_EXCL) {
 839                 case 0:
 840                         WRITE32(NFS4_CREATE_UNCHECKED);
 841                         encode_attrs(xdr, arg->u.attrs, arg->server);
 842                         break;
 843                 default:
 844                         WRITE32(NFS4_CREATE_EXCLUSIVE);
 845                         encode_nfs4_verifier(xdr, &arg->u.verifier);
 846         }
 847 }
 848
 849 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
 850 {
 851         uint32_t *p;
 852
 853         RESERVE_SPACE(4);
 854         switch (arg->open_flags & O_CREAT) {
 855                 case 0:
 856                         WRITE32(NFS4_OPEN_NOCREATE);
 857                         break;
 858                 default:
 859                         BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
 860                         WRITE32(NFS4_OPEN_CREATE);
 861                         encode_createmode(xdr, arg);
 862         }
 863 }
 864
 865 static inline void encode_delegation_type(struct xdr_stream *xdr, int delegation_type)
 866 {
 867         uint32_t *p;
 868
 869         RESERVE_SPACE(4);
 870         switch (delegation_type) {
 871                 case 0:
 872                         WRITE32(NFS4_OPEN_DELEGATE_NONE);
 873                         break;
 874                 case FMODE_READ:
 875                         WRITE32(NFS4_OPEN_DELEGATE_READ);
 876                         break;
 877                 case FMODE_WRITE|FMODE_READ:
 878                         WRITE32(NFS4_OPEN_DELEGATE_WRITE);
 879                         break;
 880                 default:
 881                         BUG();
 882         }
 883 }
 884
 885 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
 886 {
 887         uint32_t *p;
 888
 889         RESERVE_SPACE(4);
 890         WRITE32(NFS4_OPEN_CLAIM_NULL);
 891         encode_string(xdr, name->len, name->name);
 892 }
 893
 894 static inline void encode_claim_previous(struct xdr_stream *xdr, int type)
 895 {
 896         uint32_t *p;
 897
 898         RESERVE_SPACE(4);
 899         WRITE32(NFS4_OPEN_CLAIM_PREVIOUS);
 900         encode_delegation_type(xdr, type);
 901 }
 902
 903 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
 904 {
 905         uint32_t *p;
 906
 907         RESERVE_SPACE(4+sizeof(stateid->data));
 908         WRITE32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
 909         WRITEMEM(stateid->data, sizeof(stateid->data));
 910         encode_string(xdr, name->len, name->name);
 911 }
 912
 913 static int encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg)
 914 {
 915         encode_openhdr(xdr, arg);
 916         encode_opentype(xdr, arg);
 917         switch (arg->claim) {
 918                 case NFS4_OPEN_CLAIM_NULL:
 919                         encode_claim_null(xdr, arg->name);
 920                         break;
 921                 case NFS4_OPEN_CLAIM_PREVIOUS:
 922                         encode_claim_previous(xdr, arg->u.delegation_type);
 923                         break;
 924                 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
 925                         encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
 926                         break;
 927                 default:
 928                         BUG();
 929         }
 930         return 0;
 931 }
 932
 933 static int encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg)
 934 {
 935         uint32_t *p;
 936
 937         RESERVE_SPACE(8+sizeof(arg->stateid.data));
 938         WRITE32(OP_OPEN_CONFIRM);
 939         WRITEMEM(arg->stateid.data, sizeof(arg->stateid.data));
 940         WRITE32(arg->seqid->sequence->counter);
 941
 942         return 0;
 943 }
 944
 945 static int encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg)
 946 {
 947         uint32_t *p;
 948
 949         RESERVE_SPACE(8+sizeof(arg->stateid->data));
 950         WRITE32(OP_OPEN_DOWNGRADE);
 951         WRITEMEM(arg->stateid->data, sizeof(arg->stateid->data));
 952         WRITE32(arg->seqid->sequence->counter);
 953         encode_share_access(xdr, arg->open_flags);
 954         return 0;
 955 }
 956
 957 static int
 958 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh)
 959 {
 960         int len = fh->size;
 961         uint32_t *p;
 962
 963         RESERVE_SPACE(8 + len);
 964         WRITE32(OP_PUTFH);
 965         WRITE32(len);
 966         WRITEMEM(fh->data, len);
 967
 968         return 0;
 969 }
 970
 971 static int encode_putrootfh(struct xdr_stream *xdr)
 972 {
 973         uint32_t *p;
 974
 975         RESERVE_SPACE(4);
 976         WRITE32(OP_PUTROOTFH);
 977
 978         return 0;
 979 }
 980
 981 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx)
 982 {
 983         nfs4_stateid stateid;
 984         uint32_t *p;
 985
 986         RESERVE_SPACE(16);
 987         if (ctx->state != NULL) {
 988                 nfs4_copy_stateid(&stateid, ctx->state, ctx->lockowner);
 989                 WRITEMEM(stateid.data, sizeof(stateid.data));
 990         } else
 991                 WRITEMEM(zero_stateid.data, sizeof(zero_stateid.data));
 992 }
 993
 994 static int encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args)
 995 {
 996         uint32_t *p;
 997
 998         RESERVE_SPACE(4);
 999         WRITE32(OP_READ);
1000
1001         encode_stateid(xdr, args->context);
1002
1003         RESERVE_SPACE(12);
1004         WRITE64(args->offset);
1005         WRITE32(args->count);
1006
1007         return 0;
1008 }
1009
1010 static int encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req)
1011 {
1012         struct rpc_auth *auth = req->rq_task->tk_auth;
1013         uint32_t attrs[2] = {
1014                 FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID,
1015                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1016         };
1017         int replen;
1018         uint32_t *p;
1019
1020         RESERVE_SPACE(32+sizeof(nfs4_verifier));
1021         WRITE32(OP_READDIR);
1022         WRITE64(readdir->cookie);
1023         WRITEMEM(readdir->verifier.data, sizeof(readdir->verifier.data));
1024         WRITE32(readdir->count >> 1);  /* We're not doing readdirplus */
1025         WRITE32(readdir->count);
1026         WRITE32(2);
1027         /* Switch to mounted_on_fileid if the server supports it */
1028         if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
1029                 attrs[0] &= ~FATTR4_WORD0_FILEID;
1030         else
1031                 attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
1032         WRITE32(attrs[0] & readdir->bitmask[0]);
1033         WRITE32(attrs[1] & readdir->bitmask[1]);
1034         dprintk("%s: cookie = %Lu, verifier = 0x%x%x, bitmap = 0x%x%x\n",
1035                         __FUNCTION__,
1036                         (unsigned long long)readdir->cookie,
1037                         ((u32 *)readdir->verifier.data)[0],
1038                         ((u32 *)readdir->verifier.data)[1],
1039                         attrs[0] & readdir->bitmask[0],
1040                         attrs[1] & readdir->bitmask[1]);
1041
1042         /* set up reply kvec
1043          *    toplevel_status + taglen + rescount + OP_PUTFH + status
1044          *      + OP_READDIR + status + verifer(2)  = 9
1045          */
1046         replen = (RPC_REPHDRSIZE + auth->au_rslack + 9) << 2;
1047         xdr_inline_pages(&req->rq_rcv_buf, replen, readdir->pages,
1048                          readdir->pgbase, readdir->count);
1049         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
1050                         __FUNCTION__, replen, readdir->pages,
1051                         readdir->pgbase, readdir->count);
1052
1053         return 0;
1054 }
1055
1056 static int encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req)
1057 {
1058         struct rpc_auth *auth = req->rq_task->tk_auth;
1059         unsigned int replen;
1060         uint32_t *p;
1061
1062         RESERVE_SPACE(4);
1063         WRITE32(OP_READLINK);
1064
1065         /* set up reply kvec
1066          *    toplevel_status + taglen + rescount + OP_PUTFH + status
1067          *      + OP_READLINK + status + string length = 8
1068          */
1069         replen = (RPC_REPHDRSIZE + auth->au_rslack + 8) << 2;
1070         xdr_inline_pages(&req->rq_rcv_buf, replen, readlink->pages,
1071                         readlink->pgbase, readlink->pglen);
1072
1073         return 0;
1074 }
1075
1076 static int encode_remove(struct xdr_stream *xdr, const struct qstr *name)
1077 {
1078         uint32_t *p;
1079
1080         RESERVE_SPACE(8 + name->len);
1081         WRITE32(OP_REMOVE);
1082         WRITE32(name->len);
1083         WRITEMEM(name->name, name->len);
1084
1085         return 0;
1086 }
1087
1088 static int encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname)
1089 {
1090         uint32_t *p;
1091
1092         RESERVE_SPACE(8 + oldname->len);
1093         WRITE32(OP_RENAME);
1094         WRITE32(oldname->len);
1095         WRITEMEM(oldname->name, oldname->len);
1096
1097         RESERVE_SPACE(4 + newname->len);
1098         WRITE32(newname->len);
1099         WRITEMEM(newname->name, newname->len);
1100
1101         return 0;
1102 }
1103
1104 static int encode_renew(struct xdr_stream *xdr, const struct nfs4_client *client_stateid)
1105 {
1106         uint32_t *p;
1107
1108         RESERVE_SPACE(12);
1109         WRITE32(OP_RENEW);
1110         WRITE64(client_stateid->cl_clientid);
1111
1112         return 0;
1113 }
1114
1115 static int
1116 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg)
1117 {
1118         uint32_t *p;
1119
1120         RESERVE_SPACE(4+sizeof(zero_stateid.data));
1121         WRITE32(OP_SETATTR);
1122         WRITEMEM(zero_stateid.data, sizeof(zero_stateid.data));
1123         RESERVE_SPACE(2*4);
1124         WRITE32(1);
1125         WRITE32(FATTR4_WORD0_ACL);
1126         if (arg->acl_len % 4)
1127                 return -EINVAL;
1128         RESERVE_SPACE(4);
1129         WRITE32(arg->acl_len);
1130         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1131         return 0;
1132 }
1133
1134 static int
1135 encode_savefh(struct xdr_stream *xdr)
1136 {
1137         uint32_t *p;
1138
1139         RESERVE_SPACE(4);
1140         WRITE32(OP_SAVEFH);
1141
1142         return 0;
1143 }
1144
1145 static int encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server)
1146 {
1147         int status;
1148         uint32_t *p;
1149
1150         RESERVE_SPACE(4+sizeof(arg->stateid.data));
1151         WRITE32(OP_SETATTR);
1152         WRITEMEM(arg->stateid.data, sizeof(arg->stateid.data));
1153
1154         if ((status = encode_attrs(xdr, arg->iap, server)))
1155                 return status;
1156
1157         return 0;
1158 }
1159
1160 static int encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid)
1161 {
1162         uint32_t *p;
1163
1164         RESERVE_SPACE(4 + sizeof(setclientid->sc_verifier->data));
1165         WRITE32(OP_SETCLIENTID);
1166         WRITEMEM(setclientid->sc_verifier->data, sizeof(setclientid->sc_verifier->data));
1167
1168         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1169         RESERVE_SPACE(4);
1170         WRITE32(setclientid->sc_prog);
1171         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1172         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1173         RESERVE_SPACE(4);
1174         WRITE32(setclientid->sc_cb_ident);
1175
1176         return 0;
1177 }
1178
1179 static int encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_client *client_state)
1180 {
1181         uint32_t *p;
1182
1183         RESERVE_SPACE(12 + sizeof(client_state->cl_confirm.data));
1184         WRITE32(OP_SETCLIENTID_CONFIRM);
1185         WRITE64(client_state->cl_clientid);
1186         WRITEMEM(client_state->cl_confirm.data, sizeof(client_state->cl_confirm.data));
1187
1188         return 0;
1189 }
1190
1191 static int encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args)
1192 {
1193         uint32_t *p;
1194
1195         RESERVE_SPACE(4);
1196         WRITE32(OP_WRITE);
1197
1198         encode_stateid(xdr, args->context);
1199
1200         RESERVE_SPACE(16);
1201         WRITE64(args->offset);
1202         WRITE32(args->stable);
1203         WRITE32(args->count);
1204
1205         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1206
1207         return 0;
1208 }
1209
1210 static int encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1211 {
1212         uint32_t *p;
1213
1214         RESERVE_SPACE(20);
1215
1216         WRITE32(OP_DELEGRETURN);
1217         WRITEMEM(stateid->data, sizeof(stateid->data));
1218         return 0;
1219
1220 }
1221 /*
1222  * END OF "GENERIC" ENCODE ROUTINES.
1223  */
1224
1225 /*
1226  * Encode an ACCESS request
1227  */
1228 static int nfs4_xdr_enc_access(struct rpc_rqst *req, uint32_t *p, const struct nfs4_accessargs *args)
1229 {
1230         struct xdr_stream xdr;
1231         struct compound_hdr hdr = {
1232                 .nops = 2,
1233         };
1234         int status;
1235
1236         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1237         encode_compound_hdr(&xdr, &hdr);
1238         if ((status = encode_putfh(&xdr, args->fh)) == 0)
1239                 status = encode_access(&xdr, args->access);
1240         return status;
1241 }
1242
1243 /*
1244  * Encode LOOKUP request
1245  */
1246 static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, uint32_t *p, const struct nfs4_lookup_arg *args)
1247 {
1248         struct xdr_stream xdr;
1249         struct compound_hdr hdr = {
1250                 .nops = 4,
1251         };
1252         int status;
1253
1254         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1255         encode_compound_hdr(&xdr, &hdr);
1256         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1257                 goto out;
1258         if ((status = encode_lookup(&xdr, args->name)) != 0)
1259                 goto out;
1260         if ((status = encode_getfh(&xdr)) != 0)
1261                 goto out;
1262         status = encode_getfattr(&xdr, args->bitmask);
1263 out:
1264         return status;
1265 }
1266
1267 /*
1268  * Encode LOOKUP_ROOT request
1269  */
1270 static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, uint32_t *p, const struct nfs4_lookup_root_arg *args)
1271 {
1272         struct xdr_stream xdr;
1273         struct compound_hdr hdr = {
1274                 .nops = 3,
1275         };
1276         int status;
1277
1278         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1279         encode_compound_hdr(&xdr, &hdr);
1280         if ((status = encode_putrootfh(&xdr)) != 0)
1281                 goto out;
1282         if ((status = encode_getfh(&xdr)) == 0)
1283                 status = encode_getfattr(&xdr, args->bitmask);
1284 out:
1285         return status;
1286 }
1287
1288 /*
1289  * Encode REMOVE request
1290  */
1291 static int nfs4_xdr_enc_remove(struct rpc_rqst *req, uint32_t *p, const struct nfs4_remove_arg *args)
1292 {
1293         struct xdr_stream xdr;
1294         struct compound_hdr hdr = {
1295                 .nops = 2,
1296         };
1297         int status;
1298
1299         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1300         encode_compound_hdr(&xdr, &hdr);
1301         if ((status = encode_putfh(&xdr, args->fh)) == 0)
1302                 status = encode_remove(&xdr, args->name);
1303         return status;
1304 }
1305
1306 /*
1307  * Encode RENAME request
1308  */
1309 static int nfs4_xdr_enc_rename(struct rpc_rqst *req, uint32_t *p, const struct nfs4_rename_arg *args)
1310 {
1311         struct xdr_stream xdr;
1312         struct compound_hdr hdr = {
1313                 .nops = 4,
1314         };
1315         int status;
1316
1317         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1318         encode_compound_hdr(&xdr, &hdr);
1319         if ((status = encode_putfh(&xdr, args->old_dir)) != 0)
1320                 goto out;
1321         if ((status = encode_savefh(&xdr)) != 0)
1322                 goto out;
1323         if ((status = encode_putfh(&xdr, args->new_dir)) != 0)
1324                 goto out;
1325         status = encode_rename(&xdr, args->old_name, args->new_name);
1326 out:
1327         return status;
1328 }
1329
1330 /*
1331  * Encode LINK request
1332  */
1333 static int nfs4_xdr_enc_link(struct rpc_rqst *req, uint32_t *p, const struct nfs4_link_arg *args)
1334 {
1335         struct xdr_stream xdr;
1336         struct compound_hdr hdr = {
1337                 .nops = 4,
1338         };
1339         int status;
1340
1341         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1342         encode_compound_hdr(&xdr, &hdr);
1343         if ((status = encode_putfh(&xdr, args->fh)) != 0)
1344                 goto out;
1345         if ((status = encode_savefh(&xdr)) != 0)
1346                 goto out;
1347         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1348                 goto out;
1349         status = encode_link(&xdr, args->name);
1350 out:
1351         return status;
1352 }
1353
1354 /*
1355  * Encode CREATE request
1356  */
1357 static int nfs4_xdr_enc_create(struct rpc_rqst *req, uint32_t *p, const struct nfs4_create_arg *args)
1358 {
1359         struct xdr_stream xdr;
1360         struct compound_hdr hdr = {
1361                 .nops = 4,
1362         };
1363         int status;
1364
1365         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1366         encode_compound_hdr(&xdr, &hdr);
1367         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1368                 goto out;
1369         if ((status = encode_create(&xdr, args)) != 0)
1370                 goto out;
1371         if ((status = encode_getfh(&xdr)) != 0)
1372                 goto out;
1373         status = encode_getfattr(&xdr, args->bitmask);
1374 out:
1375         return status;
1376 }
1377
1378 /*
1379  * Encode SYMLINK request
1380  */
1381 static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, uint32_t *p, const struct nfs4_create_arg *args)
1382 {
1383         return nfs4_xdr_enc_create(req, p, args);
1384 }
1385
1386 /*
1387  * Encode GETATTR request
1388  */
1389 static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, uint32_t *p, const struct nfs4_getattr_arg *args)
1390 {
1391         struct xdr_stream xdr;
1392         struct compound_hdr hdr = {
1393                 .nops = 2,
1394         };
1395         int status;
1396
1397         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1398         encode_compound_hdr(&xdr, &hdr);
1399         if ((status = encode_putfh(&xdr, args->fh)) == 0)
1400                 status = encode_getfattr(&xdr, args->bitmask);
1401         return status;
1402 }
1403
1404 /*
1405  * Encode a CLOSE request
1406  */
1407 static int nfs4_xdr_enc_close(struct rpc_rqst *req, uint32_t *p, struct nfs_closeargs *args)
1408 {
1409         struct xdr_stream xdr;
1410         struct compound_hdr hdr = {
1411                 .nops   = 2,
1412         };
1413         int status;
1414
1415         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1416         encode_compound_hdr(&xdr, &hdr);
1417         status = encode_putfh(&xdr, args->fh);
1418         if(status)
1419                 goto out;
1420         status = encode_close(&xdr, args);
1421 out:
1422         return status;
1423 }
1424
1425 /*
1426  * Encode an OPEN request
1427  */
1428 static int nfs4_xdr_enc_open(struct rpc_rqst *req, uint32_t *p, struct nfs_openargs *args)
1429 {
1430         struct xdr_stream xdr;
1431         struct compound_hdr hdr = {
1432                 .nops = 4,
1433         };
1434         int status;
1435
1436         status = nfs_wait_on_sequence(args->seqid, req->rq_task);
1437         if (status != 0)
1438                 goto out;
1439         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1440         encode_compound_hdr(&xdr, &hdr);
1441         status = encode_putfh(&xdr, args->fh);
1442         if (status)
1443                 goto out;
1444         status = encode_open(&xdr, args);
1445         if (status)
1446                 goto out;
1447         status = encode_getfh(&xdr);
1448         if (status)
1449                 goto out;
1450         status = encode_getfattr(&xdr, args->bitmask);
1451 out:
1452         return status;
1453 }
1454
1455 /*
1456  * Encode an OPEN_CONFIRM request
1457  */
1458 static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, uint32_t *p, struct nfs_open_confirmargs *args)
1459 {
1460         struct xdr_stream xdr;
1461         struct compound_hdr hdr = {
1462                 .nops   = 2,
1463         };
1464         int status;
1465
1466         status = nfs_wait_on_sequence(args->seqid, req->rq_task);
1467         if (status != 0)
1468                 goto out;
1469         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1470         encode_compound_hdr(&xdr, &hdr);
1471         status = encode_putfh(&xdr, args->fh);
1472         if(status)
1473                 goto out;
1474         status = encode_open_confirm(&xdr, args);
1475 out:
1476         return status;
1477 }
1478
1479 /*
1480  * Encode an OPEN request with no attributes.
1481  */
1482 static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, uint32_t *p, struct nfs_openargs *args)
1483 {
1484         struct xdr_stream xdr;
1485         struct compound_hdr hdr = {
1486                 .nops   = 2,
1487         };
1488         int status;
1489
1490         status = nfs_wait_on_sequence(args->seqid, req->rq_task);
1491         if (status != 0)
1492                 goto out;
1493         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1494         encode_compound_hdr(&xdr, &hdr);
1495         status = encode_putfh(&xdr, args->fh);
1496         if (status)
1497                 goto out;
1498         status = encode_open(&xdr, args);
1499 out:
1500         return status;
1501 }
1502
1503 /*
1504  * Encode an OPEN_DOWNGRADE request
1505  */
1506 static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, uint32_t *p, struct nfs_closeargs *args)
1507 {
1508         struct xdr_stream xdr;
1509         struct compound_hdr hdr = {
1510                 .nops   = 2,
1511         };
1512         int status;
1513
1514         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1515         encode_compound_hdr(&xdr, &hdr);
1516         status = encode_putfh(&xdr, args->fh);
1517         if (status)
1518                 goto out;
1519         status = encode_open_downgrade(&xdr, args);
1520 out:
1521         return status;
1522 }
1523
1524 /*
1525  * Encode a LOCK request
1526  */
1527 static int nfs4_xdr_enc_lock(struct rpc_rqst *req, uint32_t *p, struct nfs_lockargs *args)
1528 {
1529         struct xdr_stream xdr;
1530         struct compound_hdr hdr = {
1531                 .nops   = 2,
1532         };
1533         struct nfs_lock_opargs *opargs = args->u.lock;
1534         int status;
1535
1536         status = nfs_wait_on_sequence(opargs->lock_seqid, req->rq_task);
1537         if (status != 0)
1538                 goto out;
1539         /* Do we need to do an open_to_lock_owner? */
1540         if (opargs->lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)
1541                 opargs->new_lock_owner = 0;
1542         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1543         encode_compound_hdr(&xdr, &hdr);
1544         status = encode_putfh(&xdr, args->fh);
1545         if(status)
1546                 goto out;
1547         status = encode_lock(&xdr, args);
1548 out:
1549         return status;
1550 }
1551
1552 /*
1553  * Encode a LOCKT request
1554  */
1555 static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, uint32_t *p, struct nfs_lockargs *args)
1556 {
1557         struct xdr_stream xdr;
1558         struct compound_hdr hdr = {
1559                 .nops   = 2,
1560         };
1561         int status;
1562
1563         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1564         encode_compound_hdr(&xdr, &hdr);
1565         status = encode_putfh(&xdr, args->fh);
1566         if(status)
1567                 goto out;
1568         status = encode_lockt(&xdr, args);
1569 out:
1570         return status;
1571 }
1572
1573 /*
1574  * Encode a LOCKU request
1575  */
1576 static int nfs4_xdr_enc_locku(struct rpc_rqst *req, uint32_t *p, struct nfs_lockargs *args)
1577 {
1578         struct xdr_stream xdr;
1579         struct compound_hdr hdr = {
1580                 .nops   = 2,
1581         };
1582         int status;
1583
1584         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1585         encode_compound_hdr(&xdr, &hdr);
1586         status = encode_putfh(&xdr, args->fh);
1587         if(status)
1588                 goto out;
1589         status = encode_locku(&xdr, args);
1590 out:
1591         return status;
1592 }
1593
1594 /*
1595  * Encode a READLINK request
1596  */
1597 static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, uint32_t *p, const struct nfs4_readlink *args)
1598 {
1599         struct xdr_stream xdr;
1600         struct compound_hdr hdr = {
1601                 .nops = 2,
1602         };
1603         int status;
1604
1605         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1606         encode_compound_hdr(&xdr, &hdr);
1607         status = encode_putfh(&xdr, args->fh);
1608         if(status)
1609                 goto out;
1610         status = encode_readlink(&xdr, args, req);
1611 out:
1612         return status;
1613 }
1614
1615 /*
1616  * Encode a READDIR request
1617  */
1618 static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, uint32_t *p, const struct nfs4_readdir_arg *args)
1619 {
1620         struct xdr_stream xdr;
1621         struct compound_hdr hdr = {
1622                 .nops = 2,
1623         };
1624         int status;
1625
1626         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1627         encode_compound_hdr(&xdr, &hdr);
1628         status = encode_putfh(&xdr, args->fh);
1629         if(status)
1630                 goto out;
1631         status = encode_readdir(&xdr, args, req);
1632 out:
1633         return status;
1634 }
1635
1636 /*
1637  * Encode a READ request
1638  */
1639 static int nfs4_xdr_enc_read(struct rpc_rqst *req, uint32_t *p, struct nfs_readargs *args)
1640 {
1641         struct rpc_auth *auth = req->rq_task->tk_auth;
1642         struct xdr_stream xdr;
1643         struct compound_hdr hdr = {
1644                 .nops = 2,
1645         };
1646         int replen, status;
1647
1648         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1649         encode_compound_hdr(&xdr, &hdr);
1650         status = encode_putfh(&xdr, args->fh);
1651         if (status)
1652                 goto out;
1653         status = encode_read(&xdr, args);
1654         if (status)
1655                 goto out;
1656
1657         /* set up reply kvec
1658          *    toplevel status + taglen=0 + rescount + OP_PUTFH + status
1659          *       + OP_READ + status + eof + datalen = 9
1660          */
1661         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_read_sz) << 2;
1662         xdr_inline_pages(&req->rq_rcv_buf, replen,
1663                          args->pages, args->pgbase, args->count);
1664 out:
1665         return status;
1666 }
1667
1668 /*
1669  * Encode an SETATTR request
1670  */
1671 static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, uint32_t *p, struct nfs_setattrargs *args)
1672
1673 {
1674         struct xdr_stream xdr;
1675         struct compound_hdr hdr = {
1676                 .nops   = 3,
1677         };
1678         int status;
1679
1680         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1681         encode_compound_hdr(&xdr, &hdr);
1682         status = encode_putfh(&xdr, args->fh);
1683         if(status)
1684                 goto out;
1685         status = encode_setattr(&xdr, args, args->server);
1686         if(status)
1687                 goto out;
1688         status = encode_getfattr(&xdr, args->bitmask);
1689 out:
1690         return status;
1691 }
1692
1693 /*
1694  * Encode a GETACL request
1695  */
1696 static int
1697 nfs4_xdr_enc_getacl(struct rpc_rqst *req, uint32_t *p,
1698                 struct nfs_getaclargs *args)
1699 {
1700         struct xdr_stream xdr;
1701         struct rpc_auth *auth = req->rq_task->tk_auth;
1702         struct compound_hdr hdr = {
1703                 .nops   = 2,
1704         };
1705         int replen, status;
1706
1707         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1708         encode_compound_hdr(&xdr, &hdr);
1709         status = encode_putfh(&xdr, args->fh);
1710         if (status)
1711                 goto out;
1712         status = encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0);
1713         /* set up reply buffer: */
1714         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_getacl_sz) << 2;
1715         xdr_inline_pages(&req->rq_rcv_buf, replen,
1716                 args->acl_pages, args->acl_pgbase, args->acl_len);
1717 out:
1718         return status;
1719 }
1720
1721 /*
1722  * Encode a WRITE request
1723  */
1724 static int nfs4_xdr_enc_write(struct rpc_rqst *req, uint32_t *p, struct nfs_writeargs *args)
1725 {
1726         struct xdr_stream xdr;
1727         struct compound_hdr hdr = {
1728                 .nops = 2,
1729         };
1730         int status;
1731
1732         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1733         encode_compound_hdr(&xdr, &hdr);
1734         status = encode_putfh(&xdr, args->fh);
1735         if (status)
1736                 goto out;
1737         status = encode_write(&xdr, args);
1738 out:
1739         return status;
1740 }
1741
1742 /*
1743  *  a COMMIT request
1744  */
1745 static int nfs4_xdr_enc_commit(struct rpc_rqst *req, uint32_t *p, struct nfs_writeargs *args)
1746 {
1747         struct xdr_stream xdr;
1748         struct compound_hdr hdr = {
1749                 .nops = 2,
1750         };
1751         int status;
1752
1753         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1754         encode_compound_hdr(&xdr, &hdr);
1755         status = encode_putfh(&xdr, args->fh);
1756         if (status)
1757                 goto out;
1758         status = encode_commit(&xdr, args);
1759 out:
1760         return status;
1761 }
1762
1763 /*
1764  * FSINFO request
1765  */
1766 static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, uint32_t *p, struct nfs4_fsinfo_arg *args)
1767 {
1768         struct xdr_stream xdr;
1769         struct compound_hdr hdr = {
1770                 .nops   = 2,
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                 status = encode_fsinfo(&xdr, args->bitmask);
1779         return status;
1780 }
1781
1782 /*
1783  * a PATHCONF request
1784  */
1785 static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, uint32_t *p, const struct nfs4_pathconf_arg *args)
1786 {
1787         struct xdr_stream xdr;
1788         struct compound_hdr hdr = {
1789                 .nops = 2,
1790         };
1791         int status;
1792
1793         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1794         encode_compound_hdr(&xdr, &hdr);
1795         status = encode_putfh(&xdr, args->fh);
1796         if (!status)
1797                 status = encode_getattr_one(&xdr,
1798                                 args->bitmask[0] & nfs4_pathconf_bitmap[0]);
1799         return status;
1800 }
1801
1802 /*
1803  * a STATFS request
1804  */
1805 static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, uint32_t *p, const struct nfs4_statfs_arg *args)
1806 {
1807         struct xdr_stream xdr;
1808         struct compound_hdr hdr = {
1809                 .nops = 2,
1810         };
1811         int status;
1812
1813         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1814         encode_compound_hdr(&xdr, &hdr);
1815         status = encode_putfh(&xdr, args->fh);
1816         if (status == 0)
1817                 status = encode_getattr_two(&xdr,
1818                                 args->bitmask[0] & nfs4_statfs_bitmap[0],
1819                                 args->bitmask[1] & nfs4_statfs_bitmap[1]);
1820         return status;
1821 }
1822
1823 /*
1824  * GETATTR_BITMAP request
1825  */
1826 static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, uint32_t *p, const struct nfs_fh *fhandle)
1827 {
1828         struct xdr_stream xdr;
1829         struct compound_hdr hdr = {
1830                 .nops = 2,
1831         };
1832         int status;
1833
1834         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1835         encode_compound_hdr(&xdr, &hdr);
1836         status = encode_putfh(&xdr, fhandle);
1837         if (status == 0)
1838                 status = encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
1839                                 FATTR4_WORD0_LINK_SUPPORT|
1840                                 FATTR4_WORD0_SYMLINK_SUPPORT|
1841                                 FATTR4_WORD0_ACLSUPPORT);
1842         return status;
1843 }
1844
1845 /*
1846  * a RENEW request
1847  */
1848 static int nfs4_xdr_enc_renew(struct rpc_rqst *req, uint32_t *p, struct nfs4_client *clp)
1849 {
1850         struct xdr_stream xdr;
1851         struct compound_hdr hdr = {
1852                 .nops   = 1,
1853         };
1854
1855         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1856         encode_compound_hdr(&xdr, &hdr);
1857         return encode_renew(&xdr, clp);
1858 }
1859
1860 /*
1861  * a SETCLIENTID request
1862  */
1863 static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, uint32_t *p, struct nfs4_setclientid *sc)
1864 {
1865         struct xdr_stream xdr;
1866         struct compound_hdr hdr = {
1867                 .nops   = 1,
1868         };
1869
1870         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1871         encode_compound_hdr(&xdr, &hdr);
1872         return encode_setclientid(&xdr, sc);
1873 }
1874
1875 /*
1876  * a SETCLIENTID_CONFIRM request
1877  */
1878 static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, uint32_t *p, struct nfs4_client *clp)
1879 {
1880         struct xdr_stream xdr;
1881         struct compound_hdr hdr = {
1882                 .nops   = 3,
1883         };
1884         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
1885         int status;
1886
1887         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1888         encode_compound_hdr(&xdr, &hdr);
1889         status = encode_setclientid_confirm(&xdr, clp);
1890         if (!status)
1891                 status = encode_putrootfh(&xdr);
1892         if (!status)
1893                 status = encode_fsinfo(&xdr, lease_bitmap);
1894         return status;
1895 }
1896
1897 /*
1898  * DELEGRETURN request
1899  */
1900 static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, uint32_t *p, const struct nfs4_delegreturnargs *args)
1901 {
1902         struct xdr_stream xdr;
1903         struct compound_hdr hdr = {
1904                 .nops = 2,
1905         };
1906         int status;
1907
1908         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1909         encode_compound_hdr(&xdr, &hdr);
1910         if ((status = encode_putfh(&xdr, args->fhandle)) == 0)
1911                 status = encode_delegreturn(&xdr, args->stateid);
1912         return status;
1913 }
1914
1915 /*
1916  * START OF "GENERIC" DECODE ROUTINES.
1917  *   These may look a little ugly since they are imported from a "generic"
1918  * set of XDR encode/decode routines which are intended to be shared by
1919  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
1920  *
1921  * If the pain of reading these is too great, it should be a straightforward
1922  * task to translate them into Linux-specific versions which are more
1923  * consistent with the style used in NFSv2/v3...
1924  */
1925 #define READ32(x)         (x) = ntohl(*p++)
1926 #define READ64(x)         do {                  \
1927         (x) = (u64)ntohl(*p++) << 32;           \
1928         (x) |= ntohl(*p++);                     \
1929 } while (0)
1930 #define READTIME(x)       do {                  \
1931         p++;                                    \
1932         (x.tv_sec) = ntohl(*p++);               \
1933         (x.tv_nsec) = ntohl(*p++);              \
1934 } while (0)
1935 #define COPYMEM(x,nbytes) do {                  \
1936         memcpy((x), p, nbytes);                 \
1937         p += XDR_QUADLEN(nbytes);               \
1938 } while (0)
1939
1940 #define READ_BUF(nbytes)  do { \
1941         p = xdr_inline_decode(xdr, nbytes); \
1942         if (!p) { \
1943                 printk(KERN_WARNING "%s: reply buffer overflowed in line %d.", \
1944                                 __FUNCTION__, __LINE__); \
1945                 return -EIO; \
1946         } \
1947 } while (0)
1948
1949 static int decode_opaque_inline(struct xdr_stream *xdr, uint32_t *len, char **string)
1950 {
1951         uint32_t *p;
1952
1953         READ_BUF(4);
1954         READ32(*len);
1955         READ_BUF(*len);
1956         *string = (char *)p;
1957         return 0;
1958 }
1959
1960 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
1961 {
1962         uint32_t *p;
1963
1964         READ_BUF(8);
1965         READ32(hdr->status);
1966         READ32(hdr->taglen);
1967
1968         READ_BUF(hdr->taglen + 4);
1969         hdr->tag = (char *)p;
1970         p += XDR_QUADLEN(hdr->taglen);
1971         READ32(hdr->nops);
1972         return 0;
1973 }
1974
1975 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
1976 {
1977         uint32_t *p;
1978         uint32_t opnum;
1979         int32_t nfserr;
1980
1981         READ_BUF(8);
1982         READ32(opnum);
1983         if (opnum != expected) {
1984                 printk(KERN_NOTICE
1985                                 "nfs4_decode_op_hdr: Server returned operation"
1986                                 " %d but we issued a request for %d\n",
1987                                 opnum, expected);
1988                 return -EIO;
1989         }
1990         READ32(nfserr);
1991         if (nfserr != NFS_OK)
1992                 return -nfs_stat_to_errno(nfserr);
1993         return 0;
1994 }
1995
1996 /* Dummy routine */
1997 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs4_client *clp)
1998 {
1999         uint32_t *p;
2000         uint32_t strlen;
2001         char *str;
2002
2003         READ_BUF(12);
2004         return decode_opaque_inline(xdr, &strlen, &str);
2005 }
2006
2007 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2008 {
2009         uint32_t bmlen, *p;
2010
2011         READ_BUF(4);
2012         READ32(bmlen);
2013
2014         bitmap[0] = bitmap[1] = 0;
2015         READ_BUF((bmlen << 2));
2016         if (bmlen > 0) {
2017                 READ32(bitmap[0]);
2018                 if (bmlen > 1)
2019                         READ32(bitmap[1]);
2020         }
2021         return 0;
2022 }
2023
2024 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, uint32_t **savep)
2025 {
2026         uint32_t *p;
2027
2028         READ_BUF(4);
2029         READ32(*attrlen);
2030         *savep = xdr->p;
2031         return 0;
2032 }
2033
2034 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2035 {
2036         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2037                 decode_attr_bitmap(xdr, bitmask);
2038                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2039         } else
2040                 bitmask[0] = bitmask[1] = 0;
2041         dprintk("%s: bitmask=0x%x%x\n", __FUNCTION__, bitmask[0], bitmask[1]);
2042         return 0;
2043 }
2044
2045 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2046 {
2047         uint32_t *p;
2048
2049         *type = 0;
2050         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2051                 return -EIO;
2052         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2053                 READ_BUF(4);
2054                 READ32(*type);
2055                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2056                         dprintk("%s: bad type %d\n", __FUNCTION__, *type);
2057                         return -EIO;
2058                 }
2059                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2060         }
2061         dprintk("%s: type=0%o\n", __FUNCTION__, nfs_type2fmt[*type].nfs2type);
2062         return 0;
2063 }
2064
2065 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2066 {
2067         uint32_t *p;
2068
2069         *change = 0;
2070         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2071                 return -EIO;
2072         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2073                 READ_BUF(8);
2074                 READ64(*change);
2075                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2076         }
2077         dprintk("%s: change attribute=%Lu\n", __FUNCTION__,
2078                         (unsigned long long)*change);
2079         return 0;
2080 }
2081
2082 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2083 {
2084         uint32_t *p;
2085
2086         *size = 0;
2087         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2088                 return -EIO;
2089         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2090                 READ_BUF(8);
2091                 READ64(*size);
2092                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2093         }
2094         dprintk("%s: file size=%Lu\n", __FUNCTION__, (unsigned long long)*size);
2095         return 0;
2096 }
2097
2098 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2099 {
2100         uint32_t *p;
2101
2102         *res = 0;
2103         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2104                 return -EIO;
2105         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2106                 READ_BUF(4);
2107                 READ32(*res);
2108                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2109         }
2110         dprintk("%s: link support=%s\n", __FUNCTION__, *res == 0 ? "false" : "true");
2111         return 0;
2112 }
2113
2114 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2115 {
2116         uint32_t *p;
2117
2118         *res = 0;
2119         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2120                 return -EIO;
2121         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2122                 READ_BUF(4);
2123                 READ32(*res);
2124                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2125         }
2126         dprintk("%s: symlink support=%s\n", __FUNCTION__, *res == 0 ? "false" : "true");
2127         return 0;
2128 }
2129
2130 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fsid *fsid)
2131 {
2132         uint32_t *p;
2133
2134         fsid->major = 0;
2135         fsid->minor = 0;
2136         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2137                 return -EIO;
2138         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2139                 READ_BUF(16);
2140                 READ64(fsid->major);
2141                 READ64(fsid->minor);
2142                 bitmap[0] &= ~FATTR4_WORD0_FSID;
2143         }
2144         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __FUNCTION__,
2145                         (unsigned long long)fsid->major,
2146                         (unsigned long long)fsid->minor);
2147         return 0;
2148 }
2149
2150 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2151 {
2152         uint32_t *p;
2153
2154         *res = 60;
2155         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2156                 return -EIO;
2157         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2158                 READ_BUF(4);
2159                 READ32(*res);
2160                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2161         }
2162         dprintk("%s: file size=%u\n", __FUNCTION__, (unsigned int)*res);
2163         return 0;
2164 }
2165
2166 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2167 {
2168         uint32_t *p;
2169
2170         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2171         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2172                 return -EIO;
2173         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2174                 READ_BUF(4);
2175                 READ32(*res);
2176                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2177         }
2178         dprintk("%s: ACLs supported=%u\n", __FUNCTION__, (unsigned int)*res);
2179         return 0;
2180 }
2181
2182 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2183 {
2184         uint32_t *p;
2185
2186         *fileid = 0;
2187         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2188                 return -EIO;
2189         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2190                 READ_BUF(8);
2191                 READ64(*fileid);
2192                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2193         }
2194         dprintk("%s: fileid=%Lu\n", __FUNCTION__, (unsigned long long)*fileid);
2195         return 0;
2196 }
2197
2198 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2199 {
2200         uint32_t *p;
2201         int status = 0;
2202
2203         *res = 0;
2204         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
2205                 return -EIO;
2206         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
2207                 READ_BUF(8);
2208                 READ64(*res);
2209                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
2210         }
2211         dprintk("%s: files avail=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2212         return status;
2213 }
2214
2215 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2216 {
2217         uint32_t *p;
2218         int status = 0;
2219
2220         *res = 0;
2221         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
2222                 return -EIO;
2223         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
2224                 READ_BUF(8);
2225                 READ64(*res);
2226                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
2227         }
2228         dprintk("%s: files free=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2229         return status;
2230 }
2231
2232 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2233 {
2234         uint32_t *p;
2235         int status = 0;
2236
2237         *res = 0;
2238         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
2239                 return -EIO;
2240         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
2241                 READ_BUF(8);
2242                 READ64(*res);
2243                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
2244         }
2245         dprintk("%s: files total=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2246         return status;
2247 }
2248
2249 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2250 {
2251         uint32_t *p;
2252         int status = 0;
2253
2254         *res = 0;
2255         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
2256                 return -EIO;
2257         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
2258                 READ_BUF(8);
2259                 READ64(*res);
2260                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
2261         }
2262         dprintk("%s: maxfilesize=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2263         return status;
2264 }
2265
2266 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
2267 {
2268         uint32_t *p;
2269         int status = 0;
2270
2271         *maxlink = 1;
2272         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
2273                 return -EIO;
2274         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
2275                 READ_BUF(4);
2276                 READ32(*maxlink);
2277                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
2278         }
2279         dprintk("%s: maxlink=%u\n", __FUNCTION__, *maxlink);
2280         return status;
2281 }
2282
2283 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
2284 {
2285         uint32_t *p;
2286         int status = 0;
2287
2288         *maxname = 1024;
2289         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
2290                 return -EIO;
2291         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
2292                 READ_BUF(4);
2293                 READ32(*maxname);
2294                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
2295         }
2296         dprintk("%s: maxname=%u\n", __FUNCTION__, *maxname);
2297         return status;
2298 }
2299
2300 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2301 {
2302         uint32_t *p;
2303         int status = 0;
2304
2305         *res = 1024;
2306         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
2307                 return -EIO;
2308         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
2309                 uint64_t maxread;
2310                 READ_BUF(8);
2311                 READ64(maxread);
2312                 if (maxread > 0x7FFFFFFF)
2313                         maxread = 0x7FFFFFFF;
2314                 *res = (uint32_t)maxread;
2315                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
2316         }
2317         dprintk("%s: maxread=%lu\n", __FUNCTION__, (unsigned long)*res);
2318         return status;
2319 }
2320
2321 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2322 {
2323         uint32_t *p;
2324         int status = 0;
2325
2326         *res = 1024;
2327         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
2328                 return -EIO;
2329         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
2330                 uint64_t maxwrite;
2331                 READ_BUF(8);
2332                 READ64(maxwrite);
2333                 if (maxwrite > 0x7FFFFFFF)
2334                         maxwrite = 0x7FFFFFFF;
2335                 *res = (uint32_t)maxwrite;
2336                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
2337         }
2338         dprintk("%s: maxwrite=%lu\n", __FUNCTION__, (unsigned long)*res);
2339         return status;
2340 }
2341
2342 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *mode)
2343 {
2344         uint32_t *p;
2345
2346         *mode = 0;
2347         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
2348                 return -EIO;
2349         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
2350                 READ_BUF(4);
2351                 READ32(*mode);
2352                 *mode &= ~S_IFMT;
2353                 bitmap[1] &= ~FATTR4_WORD1_MODE;
2354         }
2355         dprintk("%s: file mode=0%o\n", __FUNCTION__, (unsigned int)*mode);
2356         return 0;
2357 }
2358
2359 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
2360 {
2361         uint32_t *p;
2362
2363         *nlink = 1;
2364         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
2365                 return -EIO;
2366         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
2367                 READ_BUF(4);
2368                 READ32(*nlink);
2369                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
2370         }
2371         dprintk("%s: nlink=%u\n", __FUNCTION__, (unsigned int)*nlink);
2372         return 0;
2373 }
2374
2375 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_client *clp, int32_t *uid)
2376 {
2377         uint32_t len, *p;
2378
2379         *uid = -2;
2380         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
2381                 return -EIO;
2382         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
2383                 READ_BUF(4);
2384                 READ32(len);
2385                 READ_BUF(len);
2386                 if (len < XDR_MAX_NETOBJ) {
2387                         if (nfs_map_name_to_uid(clp, (char *)p, len, uid) != 0)
2388                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
2389                                                 __FUNCTION__);
2390                 } else
2391                         printk(KERN_WARNING "%s: name too long (%u)!\n",
2392                                         __FUNCTION__, len);
2393                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
2394         }
2395         dprintk("%s: uid=%d\n", __FUNCTION__, (int)*uid);
2396         return 0;
2397 }
2398
2399 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_client *clp, int32_t *gid)
2400 {
2401         uint32_t len, *p;
2402
2403         *gid = -2;
2404         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
2405                 return -EIO;
2406         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
2407                 READ_BUF(4);
2408                 READ32(len);
2409                 READ_BUF(len);
2410                 if (len < XDR_MAX_NETOBJ) {
2411                         if (nfs_map_group_to_gid(clp, (char *)p, len, gid) != 0)
2412                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
2413                                                 __FUNCTION__);
2414                 } else
2415                         printk(KERN_WARNING "%s: name too long (%u)!\n",
2416                                         __FUNCTION__, len);
2417                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
2418         }
2419         dprintk("%s: gid=%d\n", __FUNCTION__, (int)*gid);
2420         return 0;
2421 }
2422
2423 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
2424 {
2425         uint32_t major = 0, minor = 0, *p;
2426
2427         *rdev = MKDEV(0,0);
2428         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
2429                 return -EIO;
2430         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
2431                 dev_t tmp;
2432
2433                 READ_BUF(8);
2434                 READ32(major);
2435                 READ32(minor);
2436                 tmp = MKDEV(major, minor);
2437                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
2438                         *rdev = tmp;
2439                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
2440         }
2441         dprintk("%s: rdev=(0x%x:0x%x)\n", __FUNCTION__, major, minor);
2442         return 0;
2443 }
2444
2445 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2446 {
2447         uint32_t *p;
2448         int status = 0;
2449
2450         *res = 0;
2451         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
2452                 return -EIO;
2453         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
2454                 READ_BUF(8);
2455                 READ64(*res);
2456                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
2457         }
2458         dprintk("%s: space avail=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2459         return status;
2460 }
2461
2462 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2463 {
2464         uint32_t *p;
2465         int status = 0;
2466
2467         *res = 0;
2468         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
2469                 return -EIO;
2470         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
2471                 READ_BUF(8);
2472                 READ64(*res);
2473                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
2474         }
2475         dprintk("%s: space free=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2476         return status;
2477 }
2478
2479 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2480 {
2481         uint32_t *p;
2482         int status = 0;
2483
2484         *res = 0;
2485         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
2486                 return -EIO;
2487         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
2488                 READ_BUF(8);
2489                 READ64(*res);
2490                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
2491         }
2492         dprintk("%s: space total=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2493         return status;
2494 }
2495
2496 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
2497 {
2498         uint32_t *p;
2499
2500         *used = 0;
2501         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
2502                 return -EIO;
2503         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
2504                 READ_BUF(8);
2505                 READ64(*used);
2506                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
2507         }
2508         dprintk("%s: space used=%Lu\n", __FUNCTION__,
2509                         (unsigned long long)*used);
2510         return 0;
2511 }
2512
2513 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
2514 {
2515         uint32_t *p;
2516         uint64_t sec;
2517         uint32_t nsec;
2518
2519         READ_BUF(12);
2520         READ64(sec);
2521         READ32(nsec);
2522         time->tv_sec = (time_t)sec;
2523         time->tv_nsec = (long)nsec;
2524         return 0;
2525 }
2526
2527 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2528 {
2529         int status = 0;
2530
2531         time->tv_sec = 0;
2532         time->tv_nsec = 0;
2533         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
2534                 return -EIO;
2535         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
2536                 status = decode_attr_time(xdr, time);
2537                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
2538         }
2539         dprintk("%s: atime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2540         return status;
2541 }
2542
2543 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2544 {
2545         int status = 0;
2546
2547         time->tv_sec = 0;
2548         time->tv_nsec = 0;
2549         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
2550                 return -EIO;
2551         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
2552                 status = decode_attr_time(xdr, time);
2553                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
2554         }
2555         dprintk("%s: ctime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2556         return status;
2557 }
2558
2559 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2560 {
2561         int status = 0;
2562
2563         time->tv_sec = 0;
2564         time->tv_nsec = 0;
2565         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
2566                 return -EIO;
2567         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
2568                 status = decode_attr_time(xdr, time);
2569                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
2570         }
2571         dprintk("%s: mtime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2572         return status;
2573 }
2574
2575 static int verify_attr_len(struct xdr_stream *xdr, uint32_t *savep, uint32_t attrlen)
2576 {
2577         unsigned int attrwords = XDR_QUADLEN(attrlen);
2578         unsigned int nwords = xdr->p - savep;
2579
2580         if (unlikely(attrwords != nwords)) {
2581                 printk(KERN_WARNING "%s: server returned incorrect attribute length: %u %c %u\n",
2582                                 __FUNCTION__,
2583                                 attrwords << 2,
2584                                 (attrwords < nwords) ? '<' : '>',
2585                                 nwords << 2);
2586                 return -EIO;
2587         }
2588         return 0;
2589 }
2590
2591 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2592 {
2593         uint32_t *p;
2594
2595         READ_BUF(20);
2596         READ32(cinfo->atomic);
2597         READ64(cinfo->before);
2598         READ64(cinfo->after);
2599         return 0;
2600 }
2601
2602 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
2603 {
2604         uint32_t *p;
2605         uint32_t supp, acc;
2606         int status;
2607
2608         status = decode_op_hdr(xdr, OP_ACCESS);
2609         if (status)
2610                 return status;
2611         READ_BUF(8);
2612         READ32(supp);
2613         READ32(acc);
2614         access->supported = supp;
2615         access->access = acc;
2616         return 0;
2617 }
2618
2619 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
2620 {
2621         uint32_t *p;
2622         int status;
2623
2624         status = decode_op_hdr(xdr, OP_CLOSE);
2625         if (status)
2626                 return status;
2627         READ_BUF(sizeof(res->stateid.data));
2628         COPYMEM(res->stateid.data, sizeof(res->stateid.data));
2629         return 0;
2630 }
2631
2632 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
2633 {
2634         uint32_t *p;
2635         int status;
2636
2637         status = decode_op_hdr(xdr, OP_COMMIT);
2638         if (status)
2639                 return status;
2640         READ_BUF(8);
2641         COPYMEM(res->verf->verifier, 8);
2642         return 0;
2643 }
2644
2645 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2646 {
2647         uint32_t *p;
2648         uint32_t bmlen;
2649         int status;
2650
2651         status = decode_op_hdr(xdr, OP_CREATE);
2652         if (status)
2653                 return status;
2654         if ((status = decode_change_info(xdr, cinfo)))
2655                 return status;
2656         READ_BUF(4);
2657         READ32(bmlen);
2658         READ_BUF(bmlen << 2);
2659         return 0;
2660 }
2661
2662 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
2663 {
2664         uint32_t *savep;
2665         uint32_t attrlen,
2666                  bitmap[2] = {0};
2667         int status;
2668
2669         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2670                 goto xdr_error;
2671         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2672                 goto xdr_error;
2673         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2674                 goto xdr_error;
2675         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
2676                 goto xdr_error;
2677         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
2678                 goto xdr_error;
2679         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
2680                 goto xdr_error;
2681         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
2682                 goto xdr_error;
2683         status = verify_attr_len(xdr, savep, attrlen);
2684 xdr_error:
2685         if (status != 0)
2686                 printk(KERN_NOTICE "%s: xdr error %d!\n", __FUNCTION__, -status);
2687         return status;
2688 }
2689
2690 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
2691 {
2692         uint32_t *savep;
2693         uint32_t attrlen,
2694                  bitmap[2] = {0};
2695         int status;
2696
2697         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2698                 goto xdr_error;
2699         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2700                 goto xdr_error;
2701         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2702                 goto xdr_error;
2703
2704         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
2705                 goto xdr_error;
2706         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
2707                 goto xdr_error;
2708         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
2709                 goto xdr_error;
2710         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
2711                 goto xdr_error;
2712         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
2713                 goto xdr_error;
2714         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
2715                 goto xdr_error;
2716
2717         status = verify_attr_len(xdr, savep, attrlen);
2718 xdr_error:
2719         if (status != 0)
2720                 printk(KERN_NOTICE "%s: xdr error %d!\n", __FUNCTION__, -status);
2721         return status;
2722 }
2723
2724 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
2725 {
2726         uint32_t *savep;
2727         uint32_t attrlen,
2728                  bitmap[2] = {0};
2729         int status;
2730
2731         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2732                 goto xdr_error;
2733         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2734                 goto xdr_error;
2735         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2736                 goto xdr_error;
2737
2738         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
2739                 goto xdr_error;
2740         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
2741                 goto xdr_error;
2742
2743         status = verify_attr_len(xdr, savep, attrlen);
2744 xdr_error:
2745         if (status != 0)
2746                 printk(KERN_NOTICE "%s: xdr error %d!\n", __FUNCTION__, -status);
2747         return status;
2748 }
2749
2750 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr, const struct nfs_server *server)
2751 {
2752         uint32_t *savep;
2753         uint32_t attrlen,
2754                  bitmap[2] = {0},
2755                  type;
2756         int status, fmode = 0;
2757
2758         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2759                 goto xdr_error;
2760         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2761                 goto xdr_error;
2762
2763         fattr->bitmap[0] = bitmap[0];
2764         fattr->bitmap[1] = bitmap[1];
2765
2766         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2767                 goto xdr_error;
2768
2769
2770         if ((status = decode_attr_type(xdr, bitmap, &type)) != 0)
2771                 goto xdr_error;
2772         fattr->type = nfs_type2fmt[type].nfs2type;
2773         fmode = nfs_type2fmt[type].mode;
2774
2775         if ((status = decode_attr_change(xdr, bitmap, &fattr->change_attr)) != 0)
2776                 goto xdr_error;
2777         if ((status = decode_attr_size(xdr, bitmap, &fattr->size)) != 0)
2778                 goto xdr_error;
2779         if ((status = decode_attr_fsid(xdr, bitmap, &fattr->fsid_u.nfs4)) != 0)
2780                 goto xdr_error;
2781         if ((status = decode_attr_fileid(xdr, bitmap, &fattr->fileid)) != 0)
2782                 goto xdr_error;
2783         if ((status = decode_attr_mode(xdr, bitmap, &fattr->mode)) != 0)
2784                 goto xdr_error;
2785         fattr->mode |= fmode;
2786         if ((status = decode_attr_nlink(xdr, bitmap, &fattr->nlink)) != 0)
2787                 goto xdr_error;
2788         if ((status = decode_attr_owner(xdr, bitmap, server->nfs4_state, &fattr->uid)) != 0)
2789                 goto xdr_error;
2790         if ((status = decode_attr_group(xdr, bitmap, server->nfs4_state, &fattr->gid)) != 0)
2791                 goto xdr_error;
2792         if ((status = decode_attr_rdev(xdr, bitmap, &fattr->rdev)) != 0)
2793                 goto xdr_error;
2794         if ((status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used)) != 0)
2795                 goto xdr_error;
2796         if ((status = decode_attr_time_access(xdr, bitmap, &fattr->atime)) != 0)
2797                 goto xdr_error;
2798         if ((status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime)) != 0)
2799                 goto xdr_error;
2800         if ((status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime)) != 0)
2801                 goto xdr_error;
2802         if ((status = verify_attr_len(xdr, savep, attrlen)) == 0)
2803                 fattr->valid = NFS_ATTR_FATTR | NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4;
2804 xdr_error:
2805         if (status != 0)
2806                 printk(KERN_NOTICE "%s: xdr error %d!\n", __FUNCTION__, -status);
2807         return status;
2808 }
2809
2810
2811 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
2812 {
2813         uint32_t *savep;
2814         uint32_t attrlen, bitmap[2];
2815         int status;
2816
2817         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2818                 goto xdr_error;
2819         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2820                 goto xdr_error;
2821         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2822                 goto xdr_error;
2823
2824         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
2825
2826         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
2827                 goto xdr_error;
2828         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
2829                 goto xdr_error;
2830         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
2831                 goto xdr_error;
2832         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
2833         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
2834                 goto xdr_error;
2835         fsinfo->wtpref = fsinfo->wtmax;
2836
2837         status = verify_attr_len(xdr, savep, attrlen);
2838 xdr_error:
2839         if (status != 0)
2840                 printk(KERN_NOTICE "%s: xdr error %d!\n", __FUNCTION__, -status);
2841         return status;
2842 }
2843
2844 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
2845 {
2846         uint32_t *p;
2847         uint32_t len;
2848         int status;
2849
2850         status = decode_op_hdr(xdr, OP_GETFH);
2851         if (status)
2852                 return status;
2853         /* Zero handle first to allow comparisons */
2854         memset(fh, 0, sizeof(*fh));
2855
2856         READ_BUF(4);
2857         READ32(len);
2858         if (len > NFS4_FHSIZE)
2859                 return -EIO;
2860         fh->size = len;
2861         READ_BUF(len);
2862         COPYMEM(fh->data, len);
2863         return 0;
2864 }
2865
2866 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2867 {
2868         int status;
2869
2870         status = decode_op_hdr(xdr, OP_LINK);
2871         if (status)
2872                 return status;
2873         return decode_change_info(xdr, cinfo);
2874 }
2875
2876 /*
2877  * We create the owner, so we know a proper owner.id length is 4.
2878  */
2879 static int decode_lock_denied (struct xdr_stream *xdr, struct nfs_lock_denied *denied)
2880 {
2881         uint32_t *p;
2882         uint32_t namelen;
2883
2884         READ_BUF(32);
2885         READ64(denied->offset);
2886         READ64(denied->length);
2887         READ32(denied->type);
2888         READ64(denied->owner.clientid);
2889         READ32(namelen);
2890         READ_BUF(namelen);
2891         if (namelen == 4)
2892                 READ32(denied->owner.id);
2893         return -NFS4ERR_DENIED;
2894 }
2895
2896 static int decode_lock(struct xdr_stream *xdr, struct nfs_lockres *res)
2897 {
2898         uint32_t *p;
2899         int status;
2900
2901         status = decode_op_hdr(xdr, OP_LOCK);
2902         if (status == 0) {
2903                 READ_BUF(sizeof(res->u.stateid.data));
2904                 COPYMEM(res->u.stateid.data, sizeof(res->u.stateid.data));
2905         } else if (status == -NFS4ERR_DENIED)
2906                 return decode_lock_denied(xdr, &res->u.denied);
2907         return status;
2908 }
2909
2910 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockres *res)
2911 {
2912         int status;
2913         status = decode_op_hdr(xdr, OP_LOCKT);
2914         if (status == -NFS4ERR_DENIED)
2915                 return decode_lock_denied(xdr, &res->u.denied);
2916         return status;
2917 }
2918
2919 static int decode_locku(struct xdr_stream *xdr, struct nfs_lockres *res)
2920 {
2921         uint32_t *p;
2922         int status;
2923
2924         status = decode_op_hdr(xdr, OP_LOCKU);
2925         if (status == 0) {
2926                 READ_BUF(sizeof(res->u.stateid.data));
2927                 COPYMEM(res->u.stateid.data, sizeof(res->u.stateid.data));
2928         }
2929         return status;
2930 }
2931
2932 static int decode_lookup(struct xdr_stream *xdr)
2933 {
2934         return decode_op_hdr(xdr, OP_LOOKUP);
2935 }
2936
2937 /* This is too sick! */
2938 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
2939 {
2940         uint32_t *p;
2941         uint32_t limit_type, nblocks, blocksize;
2942
2943         READ_BUF(12);
2944         READ32(limit_type);
2945         switch (limit_type) {
2946                 case 1:
2947                         READ64(*maxsize);
2948                         break;
2949                 case 2:
2950                         READ32(nblocks);
2951                         READ32(blocksize);
2952                         *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
2953         }
2954         return 0;
2955 }
2956
2957 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
2958 {
2959         uint32_t *p;
2960         uint32_t delegation_type;
2961
2962         READ_BUF(4);
2963         READ32(delegation_type);
2964         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
2965                 res->delegation_type = 0;
2966                 return 0;
2967         }
2968         READ_BUF(20);
2969         COPYMEM(res->delegation.data, sizeof(res->delegation.data));
2970         READ32(res->do_recall);
2971         switch (delegation_type) {
2972                 case NFS4_OPEN_DELEGATE_READ:
2973                         res->delegation_type = FMODE_READ;
2974                         break;
2975                 case NFS4_OPEN_DELEGATE_WRITE:
2976                         res->delegation_type = FMODE_WRITE|FMODE_READ;
2977                         if (decode_space_limit(xdr, &res->maxsize) < 0)
2978                                 return -EIO;
2979         }
2980         return decode_ace(xdr, NULL, res->server->nfs4_state);
2981 }
2982
2983 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
2984 {
2985         uint32_t *p;
2986         uint32_t bmlen;
2987         int status;
2988
2989         status = decode_op_hdr(xdr, OP_OPEN);
2990         if (status)
2991                 return status;
2992         READ_BUF(sizeof(res->stateid.data));
2993         COPYMEM(res->stateid.data, sizeof(res->stateid.data));
2994
2995         decode_change_info(xdr, &res->cinfo);
2996
2997         READ_BUF(8);
2998         READ32(res->rflags);
2999         READ32(bmlen);
3000         if (bmlen > 10)
3001                 goto xdr_error;
3002
3003         READ_BUF(bmlen << 2);
3004         p += bmlen;
3005         return decode_delegation(xdr, res);
3006 xdr_error:
3007         printk(KERN_NOTICE "%s: xdr error!\n", __FUNCTION__);
3008         return -EIO;
3009 }
3010
3011 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
3012 {
3013         uint32_t *p;
3014         int status;
3015
3016         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
3017         if (status)
3018                 return status;
3019         READ_BUF(sizeof(res->stateid.data));
3020         COPYMEM(res->stateid.data, sizeof(res->stateid.data));
3021         return 0;
3022 }
3023
3024 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
3025 {
3026         uint32_t *p;
3027         int status;
3028
3029         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
3030         if (status)
3031                 return status;
3032         READ_BUF(sizeof(res->stateid.data));
3033         COPYMEM(res->stateid.data, sizeof(res->stateid.data));
3034         return 0;
3035 }
3036
3037 static int decode_putfh(struct xdr_stream *xdr)
3038 {
3039         return decode_op_hdr(xdr, OP_PUTFH);
3040 }
3041
3042 static int decode_putrootfh(struct xdr_stream *xdr)
3043 {
3044         return decode_op_hdr(xdr, OP_PUTROOTFH);
3045 }
3046
3047 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
3048 {
3049         struct kvec *iov = req->rq_rcv_buf.head;
3050         uint32_t *p;
3051         uint32_t count, eof, recvd, hdrlen;
3052         int status;
3053
3054         status = decode_op_hdr(xdr, OP_READ);
3055         if (status)
3056                 return status;
3057         READ_BUF(8);
3058         READ32(eof);
3059         READ32(count);
3060         hdrlen = (u8 *) p - (u8 *) iov->iov_base;
3061         recvd = req->rq_rcv_buf.len - hdrlen;
3062         if (count > recvd) {
3063                 printk(KERN_WARNING "NFS: server cheating in read reply: "
3064                                 "count %u > recvd %u\n", count, recvd);
3065                 count = recvd;
3066                 eof = 0;
3067         }
3068         xdr_read_pages(xdr, count);
3069         res->eof = eof;
3070         res->count = count;
3071         return 0;
3072 }
3073
3074 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
3075 {
3076         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
3077         struct page     *page = *rcvbuf->pages;
3078         struct kvec     *iov = rcvbuf->head;
3079         unsigned int    nr, pglen = rcvbuf->page_len;
3080         uint32_t        *end, *entry, *p, *kaddr;
3081         uint32_t        len, attrlen;
3082         int             hdrlen, recvd, status;
3083
3084         status = decode_op_hdr(xdr, OP_READDIR);
3085         if (status)
3086                 return status;
3087         READ_BUF(8);
3088         COPYMEM(readdir->verifier.data, 8);
3089         dprintk("%s: verifier = 0x%x%x\n",
3090                         __FUNCTION__,
3091                         ((u32 *)readdir->verifier.data)[0],
3092                         ((u32 *)readdir->verifier.data)[1]);
3093
3094
3095         hdrlen = (char *) p - (char *) iov->iov_base;
3096         recvd = rcvbuf->len - hdrlen;
3097         if (pglen > recvd)
3098                 pglen = recvd;
3099         xdr_read_pages(xdr, pglen);
3100
3101         BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
3102         kaddr = p = (uint32_t *) kmap_atomic(page, KM_USER0);
3103         end = (uint32_t *) ((char *)p + pglen + readdir->pgbase);
3104         entry = p;
3105         for (nr = 0; *p++; nr++) {
3106                 if (p + 3 > end)
3107                         goto short_pkt;
3108                 dprintk("cookie = %Lu, ", *((unsigned long long *)p));
3109                 p += 2;                 /* cookie */
3110                 len = ntohl(*p++);      /* filename length */
3111                 if (len > NFS4_MAXNAMLEN) {
3112                         printk(KERN_WARNING "NFS: giant filename in readdir (len 0x%x)\n", len);
3113                         goto err_unmap;
3114                 }
3115                 dprintk("filename = %*s\n", len, (char *)p);
3116                 p += XDR_QUADLEN(len);
3117                 if (p + 1 > end)
3118                         goto short_pkt;
3119                 len = ntohl(*p++);      /* bitmap length */
3120                 p += len;
3121                 if (p + 1 > end)
3122                         goto short_pkt;
3123                 attrlen = XDR_QUADLEN(ntohl(*p++));
3124                 p += attrlen;           /* attributes */
3125                 if (p + 2 > end)
3126                         goto short_pkt;
3127                 entry = p;
3128         }
3129         if (!nr && (entry[0] != 0 || entry[1] == 0))
3130                 goto short_pkt;
3131 out:
3132         kunmap_atomic(kaddr, KM_USER0);
3133         return 0;
3134 short_pkt:
3135         dprintk("%s: short packet at entry %d\n", __FUNCTION__, nr);
3136         entry[0] = entry[1] = 0;
3137         /* truncate listing ? */
3138         if (!nr) {
3139                 printk(KERN_NOTICE "NFS: readdir reply truncated!\n");
3140                 entry[1] = 1;
3141         }
3142         goto out;
3143 err_unmap:
3144         kunmap_atomic(kaddr, KM_USER0);
3145         return -errno_NFSERR_IO;
3146 }
3147
3148 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
3149 {
3150         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
3151         struct kvec *iov = rcvbuf->head;
3152         int hdrlen, len, recvd;
3153         uint32_t *p;
3154         char *kaddr;
3155         int status;
3156
3157         status = decode_op_hdr(xdr, OP_READLINK);
3158         if (status)
3159                 return status;
3160
3161         /* Convert length of symlink */
3162         READ_BUF(4);
3163         READ32(len);
3164         if (len >= rcvbuf->page_len || len <= 0) {
3165                 dprintk(KERN_WARNING "nfs: server returned giant symlink!\n");
3166                 return -ENAMETOOLONG;
3167         }
3168         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
3169         recvd = req->rq_rcv_buf.len - hdrlen;
3170         if (recvd < len) {
3171                 printk(KERN_WARNING "NFS: server cheating in readlink reply: "
3172                                 "count %u > recvd %u\n", len, recvd);
3173                 return -EIO;
3174         }
3175         xdr_read_pages(xdr, len);
3176         /*
3177          * The XDR encode routine has set things up so that
3178          * the link text will be copied directly into the
3179          * buffer.  We just have to do overflow-checking,
3180          * and and null-terminate the text (the VFS expects
3181          * null-termination).
3182          */
3183         kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
3184         kaddr[len+rcvbuf->page_base] = '\0';
3185         kunmap_atomic(kaddr, KM_USER0);
3186         return 0;
3187 }
3188
3189 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3190 {
3191         int status;
3192
3193         status = decode_op_hdr(xdr, OP_REMOVE);
3194         if (status)
3195                 goto out;
3196         status = decode_change_info(xdr, cinfo);
3197 out:
3198         return status;
3199 }
3200
3201 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
3202               struct nfs4_change_info *new_cinfo)
3203 {
3204         int status;
3205
3206         status = decode_op_hdr(xdr, OP_RENAME);
3207         if (status)
3208                 goto out;
3209         if ((status = decode_change_info(xdr, old_cinfo)))
3210                 goto out;
3211         status = decode_change_info(xdr, new_cinfo);
3212 out:
3213         return status;
3214 }
3215
3216 static int decode_renew(struct xdr_stream *xdr)
3217 {
3218         return decode_op_hdr(xdr, OP_RENEW);
3219 }
3220
3221 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
3222                 size_t *acl_len)
3223 {
3224         uint32_t *savep;
3225         uint32_t attrlen,
3226                  bitmap[2] = {0};
3227         struct kvec *iov = req->rq_rcv_buf.head;
3228         int status;
3229
3230         *acl_len = 0;
3231         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3232                 goto out;
3233         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3234                 goto out;
3235         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3236                 goto out;
3237
3238         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
3239                 return -EIO;
3240         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
3241                 int hdrlen, recvd;
3242
3243                 /* We ignore &savep and don't do consistency checks on
3244                  * the attr length.  Let userspace figure it out.... */
3245                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
3246                 recvd = req->rq_rcv_buf.len - hdrlen;
3247                 if (attrlen > recvd) {
3248                         printk(KERN_WARNING "NFS: server cheating in getattr"
3249                                         " acl reply: attrlen %u > recvd %u\n",
3250                                         attrlen, recvd);
3251                         return -EINVAL;
3252                 }
3253                 if (attrlen <= *acl_len)
3254                         xdr_read_pages(xdr, attrlen);
3255                 *acl_len = attrlen;
3256         } else
3257                 status = -EOPNOTSUPP;
3258
3259 out:
3260         return status;
3261 }
3262
3263 static int
3264 decode_savefh(struct xdr_stream *xdr)
3265 {
3266         return decode_op_hdr(xdr, OP_SAVEFH);
3267 }
3268
3269 static int decode_setattr(struct xdr_stream *xdr, struct nfs_setattrres *res)
3270 {
3271         uint32_t *p;
3272         uint32_t bmlen;
3273         int status;
3274
3275
3276         status = decode_op_hdr(xdr, OP_SETATTR);
3277         if (status)
3278                 return status;
3279         READ_BUF(4);
3280         READ32(bmlen);
3281         READ_BUF(bmlen << 2);
3282         return 0;
3283 }
3284
3285 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_client *clp)
3286 {
3287         uint32_t *p;
3288         uint32_t opnum;
3289         int32_t nfserr;
3290
3291         READ_BUF(8);
3292         READ32(opnum);
3293         if (opnum != OP_SETCLIENTID) {
3294                 printk(KERN_NOTICE
3295                                 "nfs4_decode_setclientid: Server returned operation"
3296                                 " %d\n", opnum);
3297                 return -EIO;
3298         }
3299         READ32(nfserr);
3300         if (nfserr == NFS_OK) {
3301                 READ_BUF(8 + sizeof(clp->cl_confirm.data));
3302                 READ64(clp->cl_clientid);
3303                 COPYMEM(clp->cl_confirm.data, sizeof(clp->cl_confirm.data));
3304         } else if (nfserr == NFSERR_CLID_INUSE) {
3305                 uint32_t len;
3306
3307                 /* skip netid string */
3308                 READ_BUF(4);
3309                 READ32(len);
3310                 READ_BUF(len);
3311
3312                 /* skip uaddr string */
3313                 READ_BUF(4);
3314                 READ32(len);
3315                 READ_BUF(len);
3316                 return -NFSERR_CLID_INUSE;
3317         } else
3318                 return -nfs_stat_to_errno(nfserr);
3319
3320         return 0;
3321 }
3322
3323 static int decode_setclientid_confirm(struct xdr_stream *xdr)
3324 {
3325         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
3326 }
3327
3328 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
3329 {
3330         uint32_t *p;
3331         int status;
3332
3333         status = decode_op_hdr(xdr, OP_WRITE);
3334         if (status)
3335                 return status;
3336
3337         READ_BUF(16);
3338         READ32(res->count);
3339         READ32(res->verf->committed);
3340         COPYMEM(res->verf->verifier, 8);
3341         return 0;
3342 }
3343
3344 static int decode_delegreturn(struct xdr_stream *xdr)
3345 {
3346         return decode_op_hdr(xdr, OP_DELEGRETURN);
3347 }
3348
3349 /*
3350  * Decode OPEN_DOWNGRADE response
3351  */
3352 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_closeres *res)
3353 {
3354         struct xdr_stream xdr;
3355         struct compound_hdr hdr;
3356         int status;
3357
3358         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3359         status = decode_compound_hdr(&xdr, &hdr);
3360         if (status)
3361                 goto out;
3362         status = decode_putfh(&xdr);
3363         if (status)
3364                 goto out;
3365         status = decode_open_downgrade(&xdr, res);
3366 out:
3367         return status;
3368 }
3369
3370 /*
3371  * END OF "GENERIC" DECODE ROUTINES.
3372  */
3373
3374 /*
3375  * Decode ACCESS response
3376  */
3377 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_accessres *res)
3378 {
3379         struct xdr_stream xdr;
3380         struct compound_hdr hdr;
3381         int status;
3382
3383         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3384         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3385                 goto out;
3386         if ((status = decode_putfh(&xdr)) == 0)
3387                 status = decode_access(&xdr, res);
3388 out:
3389         return status;
3390 }
3391
3392 /*
3393  * Decode LOOKUP response
3394  */
3395 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_lookup_res *res)
3396 {
3397         struct xdr_stream xdr;
3398         struct compound_hdr hdr;
3399         int status;
3400
3401         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3402         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3403                 goto out;
3404         if ((status = decode_putfh(&xdr)) != 0)
3405                 goto out;
3406         if ((status = decode_lookup(&xdr)) != 0)
3407                 goto out;
3408         if ((status = decode_getfh(&xdr, res->fh)) != 0)
3409                 goto out;
3410         status = decode_getfattr(&xdr, res->fattr, res->server);
3411 out:
3412         return status;
3413 }
3414
3415 /*
3416  * Decode LOOKUP_ROOT response
3417  */
3418 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_lookup_res *res)
3419 {
3420         struct xdr_stream xdr;
3421         struct compound_hdr hdr;
3422         int status;
3423
3424         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3425         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3426                 goto out;
3427         if ((status = decode_putrootfh(&xdr)) != 0)
3428                 goto out;
3429         if ((status = decode_getfh(&xdr, res->fh)) == 0)
3430                 status = decode_getfattr(&xdr, res->fattr, res->server);
3431 out:
3432         return status;
3433 }
3434
3435 /*
3436  * Decode REMOVE response
3437  */
3438 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_change_info *cinfo)
3439 {
3440         struct xdr_stream xdr;
3441         struct compound_hdr hdr;
3442         int status;
3443
3444         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3445         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3446                 goto out;
3447         if ((status = decode_putfh(&xdr)) == 0)
3448                 status = decode_remove(&xdr, cinfo);
3449 out:
3450         return status;
3451 }
3452
3453 /*
3454  * Decode RENAME response
3455  */
3456 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_rename_res *res)
3457 {
3458         struct xdr_stream xdr;
3459         struct compound_hdr hdr;
3460         int status;
3461
3462         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3463         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3464                 goto out;
3465         if ((status = decode_putfh(&xdr)) != 0)
3466                 goto out;
3467         if ((status = decode_savefh(&xdr)) != 0)
3468                 goto out;
3469         if ((status = decode_putfh(&xdr)) != 0)
3470                 goto out;
3471         status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo);
3472 out:
3473         return status;
3474 }
3475
3476 /*
3477  * Decode LINK response
3478  */
3479 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_change_info *cinfo)
3480 {
3481         struct xdr_stream xdr;
3482         struct compound_hdr hdr;
3483         int status;
3484
3485         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3486         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3487                 goto out;
3488         if ((status = decode_putfh(&xdr)) != 0)
3489                 goto out;
3490         if ((status = decode_savefh(&xdr)) != 0)
3491                 goto out;
3492         if ((status = decode_putfh(&xdr)) != 0)
3493                 goto out;
3494         status = decode_link(&xdr, cinfo);
3495 out:
3496         return status;
3497 }
3498
3499 /*
3500  * Decode CREATE response
3501  */
3502 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_create_res *res)
3503 {
3504         struct xdr_stream xdr;
3505         struct compound_hdr hdr;
3506         int status;
3507
3508         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3509         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3510                 goto out;
3511         if ((status = decode_putfh(&xdr)) != 0)
3512                 goto out;
3513         if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
3514                 goto out;
3515         if ((status = decode_getfh(&xdr, res->fh)) != 0)
3516                 goto out;
3517         status = decode_getfattr(&xdr, res->fattr, res->server);
3518         if (status == NFS4ERR_DELAY)
3519                 status = 0;
3520 out:
3521         return status;
3522 }
3523
3524 /*
3525  * Decode SYMLINK response
3526  */
3527 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_create_res *res)
3528 {
3529         return nfs4_xdr_dec_create(rqstp, p, res);
3530 }
3531
3532 /*
3533  * Decode GETATTR response
3534  */
3535 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_getattr_res *res)
3536 {
3537         struct xdr_stream xdr;
3538         struct compound_hdr hdr;
3539         int status;
3540
3541         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3542         status = decode_compound_hdr(&xdr, &hdr);
3543         if (status)
3544                 goto out;
3545         status = decode_putfh(&xdr);
3546         if (status)
3547                 goto out;
3548         status = decode_getfattr(&xdr, res->fattr, res->server);
3549 out:
3550         return status;
3551
3552 }
3553
3554 /*
3555  * Encode an SETACL request
3556  */
3557 static int
3558 nfs4_xdr_enc_setacl(struct rpc_rqst *req, uint32_t *p, struct nfs_setaclargs *args)
3559 {
3560         struct xdr_stream xdr;
3561         struct compound_hdr hdr = {
3562                 .nops   = 2,
3563         };
3564         int status;
3565
3566         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
3567         encode_compound_hdr(&xdr, &hdr);
3568         status = encode_putfh(&xdr, args->fh);
3569         if (status)
3570                 goto out;
3571         status = encode_setacl(&xdr, args);
3572 out:
3573         return status;
3574 }
3575 /*
3576  * Decode SETACL response
3577  */
3578 static int
3579 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, uint32_t *p, void *res)
3580 {
3581         struct xdr_stream xdr;
3582         struct compound_hdr hdr;
3583         int status;
3584
3585         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3586         status = decode_compound_hdr(&xdr, &hdr);
3587         if (status)
3588                 goto out;
3589         status = decode_putfh(&xdr);
3590         if (status)
3591                 goto out;
3592         status = decode_setattr(&xdr, res);
3593 out:
3594         return status;
3595 }
3596
3597 /*
3598  * Decode GETACL response
3599  */
3600 static int
3601 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, uint32_t *p, size_t *acl_len)
3602 {
3603         struct xdr_stream xdr;
3604         struct compound_hdr hdr;
3605         int status;
3606
3607         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3608         status = decode_compound_hdr(&xdr, &hdr);
3609         if (status)
3610                 goto out;
3611         status = decode_putfh(&xdr);
3612         if (status)
3613                 goto out;
3614         status = decode_getacl(&xdr, rqstp, acl_len);
3615
3616 out:
3617         return status;
3618 }
3619
3620 /*
3621  * Decode CLOSE response
3622  */
3623 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_closeres *res)
3624 {
3625         struct xdr_stream xdr;
3626         struct compound_hdr hdr;
3627         int status;
3628
3629         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3630         status = decode_compound_hdr(&xdr, &hdr);
3631         if (status)
3632                 goto out;
3633         status = decode_putfh(&xdr);
3634         if (status)
3635                 goto out;
3636         status = decode_close(&xdr, res);
3637 out:
3638         return status;
3639 }
3640
3641 /*
3642  * Decode OPEN response
3643  */
3644 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_openres *res)
3645 {
3646         struct xdr_stream xdr;
3647         struct compound_hdr hdr;
3648         int status;
3649
3650         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3651         status = decode_compound_hdr(&xdr, &hdr);
3652         if (status)
3653                 goto out;
3654         status = decode_putfh(&xdr);
3655         if (status)
3656                 goto out;
3657         status = decode_open(&xdr, res);
3658         if (status)
3659                 goto out;
3660         status = decode_getfh(&xdr, &res->fh);
3661         if (status)
3662                 goto out;
3663         status = decode_getfattr(&xdr, res->f_attr, res->server);
3664         if (status == NFS4ERR_DELAY)
3665                 status = 0;
3666 out:
3667         return status;
3668 }
3669
3670 /*
3671  * Decode OPEN_CONFIRM response
3672  */
3673 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_open_confirmres *res)
3674 {
3675         struct xdr_stream xdr;
3676         struct compound_hdr hdr;
3677         int status;
3678
3679         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3680         status = decode_compound_hdr(&xdr, &hdr);
3681         if (status)
3682                 goto out;
3683         status = decode_putfh(&xdr);
3684         if (status)
3685                 goto out;
3686         status = decode_open_confirm(&xdr, res);
3687 out:
3688         return status;
3689 }
3690
3691 /*
3692  * Decode OPEN response
3693  */
3694 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_openres *res)
3695 {
3696         struct xdr_stream xdr;
3697         struct compound_hdr hdr;
3698         int status;
3699
3700         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3701         status = decode_compound_hdr(&xdr, &hdr);
3702         if (status)
3703                 goto out;
3704         status = decode_putfh(&xdr);
3705         if (status)
3706                 goto out;
3707         status = decode_open(&xdr, res);
3708 out:
3709         return status;
3710 }
3711
3712 /*
3713  * Decode SETATTR response
3714  */
3715 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_setattrres *res)
3716 {
3717         struct xdr_stream xdr;
3718         struct compound_hdr hdr;
3719         int status;
3720
3721         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3722         status = decode_compound_hdr(&xdr, &hdr);
3723         if (status)
3724                 goto out;
3725         status = decode_putfh(&xdr);
3726         if (status)
3727                 goto out;
3728         status = decode_setattr(&xdr, res);
3729         if (status)
3730                 goto out;
3731         status = decode_getfattr(&xdr, res->fattr, res->server);
3732         if (status == NFS4ERR_DELAY)
3733                 status = 0;
3734 out:
3735         return status;
3736 }
3737
3738 /*
3739  * Decode LOCK response
3740  */
3741 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_lockres *res)
3742 {
3743         struct xdr_stream xdr;
3744         struct compound_hdr hdr;
3745         int status;
3746
3747         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3748         status = decode_compound_hdr(&xdr, &hdr);
3749         if (status)
3750                 goto out;
3751         status = decode_putfh(&xdr);
3752         if (status)
3753                 goto out;
3754         status = decode_lock(&xdr, res);
3755 out:
3756         return status;
3757 }
3758
3759 /*
3760  * Decode LOCKT response
3761  */
3762 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_lockres *res)
3763 {
3764         struct xdr_stream xdr;
3765         struct compound_hdr hdr;
3766         int status;
3767
3768         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3769         status = decode_compound_hdr(&xdr, &hdr);
3770         if (status)
3771                 goto out;
3772         status = decode_putfh(&xdr);
3773         if (status)
3774                 goto out;
3775         status = decode_lockt(&xdr, res);
3776 out:
3777         return status;
3778 }
3779
3780 /*
3781  * Decode LOCKU response
3782  */
3783 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_lockres *res)
3784 {
3785         struct xdr_stream xdr;
3786         struct compound_hdr hdr;
3787         int status;
3788
3789         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3790         status = decode_compound_hdr(&xdr, &hdr);
3791         if (status)
3792                 goto out;
3793         status = decode_putfh(&xdr);
3794         if (status)
3795                 goto out;
3796         status = decode_locku(&xdr, res);
3797 out:
3798         return status;
3799 }
3800
3801 /*
3802  * Decode READLINK response
3803  */
3804 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, uint32_t *p, void *res)
3805 {
3806         struct xdr_stream xdr;
3807         struct compound_hdr hdr;
3808         int status;
3809
3810         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3811         status = decode_compound_hdr(&xdr, &hdr);
3812         if (status)
3813                 goto out;
3814         status = decode_putfh(&xdr);
3815         if (status)
3816                 goto out;
3817         status = decode_readlink(&xdr, rqstp);
3818 out:
3819         return status;
3820 }
3821
3822 /*
3823  * Decode READDIR response
3824  */
3825 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_readdir_res *res)
3826 {
3827         struct xdr_stream xdr;
3828         struct compound_hdr hdr;
3829         int status;
3830
3831         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3832         status = decode_compound_hdr(&xdr, &hdr);
3833         if (status)
3834                 goto out;
3835         status = decode_putfh(&xdr);
3836         if (status)
3837                 goto out;
3838         status = decode_readdir(&xdr, rqstp, res);
3839 out:
3840         return status;
3841 }
3842
3843 /*
3844  * Decode Read response
3845  */
3846 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_readres *res)
3847 {
3848         struct xdr_stream xdr;
3849         struct compound_hdr hdr;
3850         int status;
3851
3852         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3853         status = decode_compound_hdr(&xdr, &hdr);
3854         if (status)
3855                 goto out;
3856         status = decode_putfh(&xdr);
3857         if (status)
3858                 goto out;
3859         status = decode_read(&xdr, rqstp, res);
3860         if (!status)
3861                 status = res->count;
3862 out:
3863         return status;
3864 }
3865
3866 /*
3867  * Decode WRITE response
3868  */
3869 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_writeres *res)
3870 {
3871         struct xdr_stream xdr;
3872         struct compound_hdr hdr;
3873         int status;
3874
3875         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3876         status = decode_compound_hdr(&xdr, &hdr);
3877         if (status)
3878                 goto out;
3879         status = decode_putfh(&xdr);
3880         if (status)
3881                 goto out;
3882         status = decode_write(&xdr, res);
3883         if (!status)
3884                 status = res->count;
3885 out:
3886         return status;
3887 }
3888
3889 /*
3890  * Decode COMMIT response
3891  */
3892 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_writeres *res)
3893 {
3894         struct xdr_stream xdr;
3895         struct compound_hdr hdr;
3896         int status;
3897
3898         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3899         status = decode_compound_hdr(&xdr, &hdr);
3900         if (status)
3901                 goto out;
3902         status = decode_putfh(&xdr);
3903         if (status)
3904                 goto out;
3905         status = decode_commit(&xdr, res);
3906 out:
3907         return status;
3908 }
3909
3910 /*
3911  * FSINFO request
3912  */
3913 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, uint32_t *p, struct nfs_fsinfo *fsinfo)
3914 {
3915         struct xdr_stream xdr;
3916         struct compound_hdr hdr;
3917         int status;
3918
3919         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
3920         status = decode_compound_hdr(&xdr, &hdr);
3921         if (!status)
3922                 status = decode_putfh(&xdr);
3923         if (!status)
3924                 status = decode_fsinfo(&xdr, fsinfo);
3925         if (!status)
3926                 status = -nfs_stat_to_errno(hdr.status);
3927         return status;
3928 }
3929
3930 /*
3931  * PATHCONF request
3932  */
3933 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, uint32_t *p, struct nfs_pathconf *pathconf)
3934 {
3935         struct xdr_stream xdr;
3936         struct compound_hdr hdr;
3937         int status;
3938
3939         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
3940         status = decode_compound_hdr(&xdr, &hdr);
3941         if (!status)
3942                 status = decode_putfh(&xdr);
3943         if (!status)
3944                 status = decode_pathconf(&xdr, pathconf);
3945         return status;
3946 }
3947
3948 /*
3949  * STATFS request
3950  */
3951 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, uint32_t *p, struct nfs_fsstat *fsstat)
3952 {
3953         struct xdr_stream xdr;
3954         struct compound_hdr hdr;
3955         int status;
3956
3957         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
3958         status = decode_compound_hdr(&xdr, &hdr);
3959         if (!status)
3960                 status = decode_putfh(&xdr);
3961         if (!status)
3962                 status = decode_statfs(&xdr, fsstat);
3963         return status;
3964 }
3965
3966 /*
3967  * GETATTR_BITMAP request
3968  */
3969 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, uint32_t *p, struct nfs4_server_caps_res *res)
3970 {
3971         struct xdr_stream xdr;
3972         struct compound_hdr hdr;
3973         int status;
3974
3975         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
3976         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3977                 goto out;
3978         if ((status = decode_putfh(&xdr)) != 0)
3979                 goto out;
3980         status = decode_server_caps(&xdr, res);
3981 out:
3982         return status;
3983 }
3984
3985 /*
3986  * Decode RENEW response
3987  */
3988 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, uint32_t *p, void *dummy)
3989 {
3990         struct xdr_stream xdr;
3991         struct compound_hdr hdr;
3992         int status;
3993
3994         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3995         status = decode_compound_hdr(&xdr, &hdr);
3996         if (!status)
3997                 status = decode_renew(&xdr);
3998         return status;
3999 }
4000
4001 /*
4002  * a SETCLIENTID request
4003  */
4004 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, uint32_t *p,
4005                 struct nfs4_client *clp)
4006 {
4007         struct xdr_stream xdr;
4008         struct compound_hdr hdr;
4009         int status;
4010
4011         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4012         status = decode_compound_hdr(&xdr, &hdr);
4013         if (!status)
4014                 status = decode_setclientid(&xdr, clp);
4015         if (!status)
4016                 status = -nfs_stat_to_errno(hdr.status);
4017         return status;
4018 }
4019
4020 /*
4021  * a SETCLIENTID_CONFIRM request
4022  */
4023 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, uint32_t *p, struct nfs_fsinfo *fsinfo)
4024 {
4025         struct xdr_stream xdr;
4026         struct compound_hdr hdr;
4027         int status;
4028
4029         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4030         status = decode_compound_hdr(&xdr, &hdr);
4031         if (!status)
4032                 status = decode_setclientid_confirm(&xdr);
4033         if (!status)
4034                 status = decode_putrootfh(&xdr);
4035         if (!status)
4036                 status = decode_fsinfo(&xdr, fsinfo);
4037         if (!status)
4038                 status = -nfs_stat_to_errno(hdr.status);
4039         return status;
4040 }
4041
4042 /*
4043  * DELEGRETURN request
4044  */
4045 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, uint32_t *p, void *dummy)
4046 {
4047         struct xdr_stream xdr;
4048         struct compound_hdr hdr;
4049         int status;
4050
4051         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4052         status = decode_compound_hdr(&xdr, &hdr);
4053         if (status == 0) {
4054                 status = decode_putfh(&xdr);
4055                 if (status == 0)
4056                         status = decode_delegreturn(&xdr);
4057         }
4058         return status;
4059 }
4060
4061 uint32_t *nfs4_decode_dirent(uint32_t *p, struct nfs_entry *entry, int plus)
4062 {
4063         uint32_t bitmap[2] = {0};
4064         uint32_t len;
4065
4066         if (!*p++) {
4067                 if (!*p)
4068                         return ERR_PTR(-EAGAIN);
4069                 entry->eof = 1;
4070                 return ERR_PTR(-EBADCOOKIE);
4071         }
4072
4073         entry->prev_cookie = entry->cookie;
4074         p = xdr_decode_hyper(p, &entry->cookie);
4075         entry->len = ntohl(*p++);
4076         entry->name = (const char *) p;
4077         p += XDR_QUADLEN(entry->len);
4078
4079         /*
4080          * In case the server doesn't return an inode number,
4081          * we fake one here.  (We don't use inode number 0,
4082          * since glibc seems to choke on it...)
4083          */
4084         entry->ino = 1;
4085
4086         len = ntohl(*p++);              /* bitmap length */
4087         if (len-- > 0) {
4088                 bitmap[0] = ntohl(*p++);
4089                 if (len-- > 0) {
4090                         bitmap[1] = ntohl(*p++);
4091                         p += len;
4092                 }
4093         }
4094         len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */
4095         if (len > 0) {
4096                 if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) {
4097                         bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
4098                         /* Ignore the return value of rdattr_error for now */
4099                         p++;
4100                         len--;
4101                 }
4102                 if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
4103                         xdr_decode_hyper(p, &entry->ino);
4104                 else if (bitmap[0] == FATTR4_WORD0_FILEID)
4105                         xdr_decode_hyper(p, &entry->ino);
4106                 p += len;
4107         }
4108
4109         entry->eof = !p[0] && p[1];
4110         return p;
4111 }
4112
4113 /*
4114  * We need to translate between nfs status return values and
4115  * the local errno values which may not be the same.
4116  */
4117 static struct {
4118         int stat;
4119         int errno;
4120 } nfs_errtbl[] = {
4121         { NFS4_OK,              0               },
4122         { NFS4ERR_PERM,         EPERM           },
4123         { NFS4ERR_NOENT,        ENOENT          },
4124         { NFS4ERR_IO,           errno_NFSERR_IO },
4125         { NFS4ERR_NXIO,         ENXIO           },
4126         { NFS4ERR_ACCESS,       EACCES          },
4127         { NFS4ERR_EXIST,        EEXIST          },
4128         { NFS4ERR_XDEV,         EXDEV           },
4129         { NFS4ERR_NOTDIR,       ENOTDIR         },
4130         { NFS4ERR_ISDIR,        EISDIR          },
4131         { NFS4ERR_INVAL,        EINVAL          },
4132         { NFS4ERR_FBIG,         EFBIG           },
4133         { NFS4ERR_NOSPC,        ENOSPC          },
4134         { NFS4ERR_ROFS,         EROFS           },
4135         { NFS4ERR_MLINK,        EMLINK          },
4136         { NFS4ERR_NAMETOOLONG,  ENAMETOOLONG    },
4137         { NFS4ERR_NOTEMPTY,     ENOTEMPTY       },
4138         { NFS4ERR_DQUOT,        EDQUOT          },
4139         { NFS4ERR_STALE,        ESTALE          },
4140         { NFS4ERR_BADHANDLE,    EBADHANDLE      },
4141         { NFS4ERR_BADOWNER,     EINVAL          },
4142         { NFS4ERR_BADNAME,      EINVAL          },
4143         { NFS4ERR_BAD_COOKIE,   EBADCOOKIE      },
4144         { NFS4ERR_NOTSUPP,      ENOTSUPP        },
4145         { NFS4ERR_TOOSMALL,     ETOOSMALL       },
4146         { NFS4ERR_SERVERFAULT,  ESERVERFAULT    },
4147         { NFS4ERR_BADTYPE,      EBADTYPE        },
4148         { NFS4ERR_LOCKED,       EAGAIN          },
4149         { NFS4ERR_RESOURCE,     EREMOTEIO       },
4150         { NFS4ERR_SYMLINK,      ELOOP           },
4151         { NFS4ERR_OP_ILLEGAL,   EOPNOTSUPP      },
4152         { NFS4ERR_DEADLOCK,     EDEADLK         },
4153         { NFS4ERR_WRONGSEC,     EPERM           }, /* FIXME: this needs
4154                                                     * to be handled by a
4155                                                     * middle-layer.
4156                                                     */
4157         { -1,                   EIO             }
4158 };
4159
4160 /*
4161  * Convert an NFS error code to a local one.
4162  * This one is used jointly by NFSv2 and NFSv3.
4163  */
4164 static int
4165 nfs_stat_to_errno(int stat)
4166 {
4167         int i;
4168         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
4169                 if (nfs_errtbl[i].stat == stat)
4170                         return nfs_errtbl[i].errno;
4171         }
4172         if (stat <= 10000 || stat > 10100) {
4173                 /* The server is looney tunes. */
4174                 return ESERVERFAULT;
4175         }
4176         /* If we cannot translate the error, the recovery routines should
4177          * handle it.
4178          * Note: remaining NFSv4 error codes have values > 10000, so should
4179          * not conflict with native Linux error codes.
4180          */
4181         return stat;
4182 }
4183
4184 #ifndef MAX
4185 # define MAX(a, b)      (((a) > (b))? (a) : (b))
4186 #endif
4187
4188 #define PROC(proc, argtype, restype)                            \
4189 [NFSPROC4_CLNT_##proc] = {                                      \
4190         .p_proc   = NFSPROC4_COMPOUND,                          \
4191         .p_encode = (kxdrproc_t) nfs4_xdr_##argtype,            \
4192         .p_decode = (kxdrproc_t) nfs4_xdr_##restype,            \
4193         .p_bufsiz = MAX(NFS4_##argtype##_sz,NFS4_##restype##_sz) << 2,  \
4194     }
4195
4196 struct rpc_procinfo     nfs4_procedures[] = {
4197   PROC(READ,            enc_read,       dec_read),
4198   PROC(WRITE,           enc_write,      dec_write),
4199   PROC(COMMIT,          enc_commit,     dec_commit),
4200   PROC(OPEN,            enc_open,       dec_open),
4201   PROC(OPEN_CONFIRM,    enc_open_confirm,       dec_open_confirm),
4202   PROC(OPEN_NOATTR,     enc_open_noattr,        dec_open_noattr),
4203   PROC(OPEN_DOWNGRADE,  enc_open_downgrade,     dec_open_downgrade),
4204   PROC(CLOSE,           enc_close,      dec_close),
4205   PROC(SETATTR,         enc_setattr,    dec_setattr),
4206   PROC(FSINFO,          enc_fsinfo,     dec_fsinfo),
4207   PROC(RENEW,           enc_renew,      dec_renew),
4208   PROC(SETCLIENTID,     enc_setclientid,        dec_setclientid),
4209   PROC(SETCLIENTID_CONFIRM,     enc_setclientid_confirm,        dec_setclientid_confirm),
4210   PROC(LOCK,            enc_lock,       dec_lock),
4211   PROC(LOCKT,           enc_lockt,      dec_lockt),
4212   PROC(LOCKU,           enc_locku,      dec_locku),
4213   PROC(ACCESS,          enc_access,     dec_access),
4214   PROC(GETATTR,         enc_getattr,    dec_getattr),
4215   PROC(LOOKUP,          enc_lookup,     dec_lookup),
4216   PROC(LOOKUP_ROOT,     enc_lookup_root,        dec_lookup_root),
4217   PROC(REMOVE,          enc_remove,     dec_remove),
4218   PROC(RENAME,          enc_rename,     dec_rename),
4219   PROC(LINK,            enc_link,       dec_link),
4220   PROC(SYMLINK,         enc_symlink,    dec_symlink),
4221   PROC(CREATE,          enc_create,     dec_create),
4222   PROC(PATHCONF,        enc_pathconf,   dec_pathconf),
4223   PROC(STATFS,          enc_statfs,     dec_statfs),
4224   PROC(READLINK,        enc_readlink,   dec_readlink),
4225   PROC(READDIR,         enc_readdir,    dec_readdir),
4226   PROC(SERVER_CAPS,     enc_server_caps, dec_server_caps),
4227   PROC(DELEGRETURN,     enc_delegreturn, dec_delegreturn),
4228   PROC(GETACL,          enc_getacl,     dec_getacl),
4229   PROC(SETACL,          enc_setacl,     dec_setacl),
4230 };
4231
4232 struct rpc_version              nfs_version4 = {
4233         .number                 = 4,
4234         .nrprocs                = sizeof(nfs4_procedures)/sizeof(nfs4_procedures[0]),
4235         .procs                  = nfs4_procedures
4236 };
4237
4238 /*
4239  * Local variables:
4240  *  c-basic-offset: 8
4241  * End:
4242  */