fs/nfs/nfs4xdr.c

   1 /*
   2  *  fs/nfs/nfs4xdr.c
   3  *
   4  *  Client-side XDR for NFSv4.
   5  *
   6  *  Copyright (c) 2002 The Regents of the University of Michigan.
   7  *  All rights reserved.
   8  *
   9  *  Kendrick Smith <kmsmith@umich.edu>
  10  *  Andy Adamson   <andros@umich.edu>
  11  *
  12  *  Redistribution and use in source and binary forms, with or without
  13  *  modification, are permitted provided that the following conditions
  14  *  are met:
  15  *
  16  *  1. Redistributions of source code must retain the above copyright
  17  *     notice, this list of conditions and the following disclaimer.
  18  *  2. Redistributions in binary form must reproduce the above copyright
  19  *     notice, this list of conditions and the following disclaimer in the
  20  *     documentation and/or other materials provided with the distribution.
  21  *  3. Neither the name of the University nor the names of its
  22  *     contributors may be used to endorse or promote products derived
  23  *     from this software without specific prior written permission.
  24  *
  25  *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  26  *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  27  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  28  *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  29  *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30  *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31  *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  32  *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  33  *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  34  *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  35  *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 #include <linux/param.h>
  39 #include <linux/time.h>
  40 #include <linux/mm.h>
  41 #include <linux/slab.h>
  42 #include <linux/utsname.h>
  43 #include <linux/errno.h>
  44 #include <linux/string.h>
  45 #include <linux/in.h>
  46 #include <linux/pagemap.h>
  47 #include <linux/proc_fs.h>
  48 #include <linux/kdev_t.h>
  49 #include <linux/sunrpc/clnt.h>
  50 #include <linux/nfs.h>
  51 #include <linux/nfs4.h>
  52 #include <linux/nfs_fs.h>
  53 #include <linux/nfs_idmap.h>
  54 #include "nfs4_fs.h"
  55
  56 #define NFSDBG_FACILITY         NFSDBG_XDR
  57
  58 /* Mapping from NFS error code to "errno" error code. */
  59 #define errno_NFSERR_IO         EIO
  60
  61 static int 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);
 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                 struct nfs_open_to_lock *ol = opargs->u.open_lock;
 733
 734                 RESERVE_SPACE(40);
 735                 WRITE32(ol->open_seqid);
 736                 WRITEMEM(&ol->open_stateid, sizeof(ol->open_stateid));
 737                 WRITE32(ol->lock_seqid);
 738                 WRITE64(ol->lock_owner.clientid);
 739                 WRITE32(4);
 740                 WRITE32(ol->lock_owner.id);
 741         }
 742         else {
 743                 struct nfs_exist_lock *el = opargs->u.exist_lock;
 744
 745                 RESERVE_SPACE(20);
 746                 WRITEMEM(&el->stateid, sizeof(el->stateid));
 747                 WRITE32(el->seqid);
 748         }
 749
 750         return 0;
 751 }
 752
 753 static int encode_lockt(struct xdr_stream *xdr, const struct nfs_lockargs *arg)
 754 {
 755         uint32_t *p;
 756         struct nfs_lowner *opargs = arg->u.lockt;
 757
 758         RESERVE_SPACE(40);
 759         WRITE32(OP_LOCKT);
 760         WRITE32(arg->type);
 761         WRITE64(arg->offset);
 762         WRITE64(arg->length);
 763         WRITE64(opargs->clientid);
 764         WRITE32(4);
 765         WRITE32(opargs->id);
 766
 767         return 0;
 768 }
 769
 770 static int encode_locku(struct xdr_stream *xdr, const struct nfs_lockargs *arg)
 771 {
 772         uint32_t *p;
 773         struct nfs_locku_opargs *opargs = arg->u.locku;
 774
 775         RESERVE_SPACE(44);
 776         WRITE32(OP_LOCKU);
 777         WRITE32(arg->type);
 778         WRITE32(opargs->seqid);
 779         WRITEMEM(&opargs->stateid, sizeof(opargs->stateid));
 780         WRITE64(arg->offset);
 781         WRITE64(arg->length);
 782
 783         return 0;
 784 }
 785
 786 static int encode_lookup(struct xdr_stream *xdr, const struct qstr *name)
 787 {
 788         int len = name->len;
 789         uint32_t *p;
 790
 791         RESERVE_SPACE(8 + len);
 792         WRITE32(OP_LOOKUP);
 793         WRITE32(len);
 794         WRITEMEM(name->name, len);
 795
 796         return 0;
 797 }
 798
 799 static void encode_share_access(struct xdr_stream *xdr, int open_flags)
 800 {
 801         uint32_t *p;
 802
 803         RESERVE_SPACE(8);
 804         switch (open_flags & (FMODE_READ|FMODE_WRITE)) {
 805                 case FMODE_READ:
 806                         WRITE32(NFS4_SHARE_ACCESS_READ);
 807                         break;
 808                 case FMODE_WRITE:
 809                         WRITE32(NFS4_SHARE_ACCESS_WRITE);
 810                         break;
 811                 case FMODE_READ|FMODE_WRITE:
 812                         WRITE32(NFS4_SHARE_ACCESS_BOTH);
 813                         break;
 814                 default:
 815                         BUG();
 816         }
 817         WRITE32(0);             /* for linux, share_deny = 0 always */
 818 }
 819
 820 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
 821 {
 822         uint32_t *p;
 823  /*
 824  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
 825  * owner 4 = 32
 826  */
 827         RESERVE_SPACE(8);
 828         WRITE32(OP_OPEN);
 829         WRITE32(arg->seqid);
 830         encode_share_access(xdr, arg->open_flags);
 831         RESERVE_SPACE(16);
 832         WRITE64(arg->clientid);
 833         WRITE32(4);
 834         WRITE32(arg->id);
 835 }
 836
 837 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
 838 {
 839         uint32_t *p;
 840
 841         RESERVE_SPACE(4);
 842         switch(arg->open_flags & O_EXCL) {
 843                 case 0:
 844                         WRITE32(NFS4_CREATE_UNCHECKED);
 845                         encode_attrs(xdr, arg->u.attrs, arg->server);
 846                         break;
 847                 default:
 848                         WRITE32(NFS4_CREATE_EXCLUSIVE);
 849                         encode_nfs4_verifier(xdr, &arg->u.verifier);
 850         }
 851 }
 852
 853 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
 854 {
 855         uint32_t *p;
 856
 857         RESERVE_SPACE(4);
 858         switch (arg->open_flags & O_CREAT) {
 859                 case 0:
 860                         WRITE32(NFS4_OPEN_NOCREATE);
 861                         break;
 862                 default:
 863                         BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
 864                         WRITE32(NFS4_OPEN_CREATE);
 865                         encode_createmode(xdr, arg);
 866         }
 867 }
 868
 869 static inline void encode_delegation_type(struct xdr_stream *xdr, int delegation_type)
 870 {
 871         uint32_t *p;
 872
 873         RESERVE_SPACE(4);
 874         switch (delegation_type) {
 875                 case 0:
 876                         WRITE32(NFS4_OPEN_DELEGATE_NONE);
 877                         break;
 878                 case FMODE_READ:
 879                         WRITE32(NFS4_OPEN_DELEGATE_READ);
 880                         break;
 881                 case FMODE_WRITE|FMODE_READ:
 882                         WRITE32(NFS4_OPEN_DELEGATE_WRITE);
 883                         break;
 884                 default:
 885                         BUG();
 886         }
 887 }
 888
 889 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
 890 {
 891         uint32_t *p;
 892
 893         RESERVE_SPACE(4);
 894         WRITE32(NFS4_OPEN_CLAIM_NULL);
 895         encode_string(xdr, name->len, name->name);
 896 }
 897
 898 static inline void encode_claim_previous(struct xdr_stream *xdr, int type)
 899 {
 900         uint32_t *p;
 901
 902         RESERVE_SPACE(4);
 903         WRITE32(NFS4_OPEN_CLAIM_PREVIOUS);
 904         encode_delegation_type(xdr, type);
 905 }
 906
 907 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
 908 {
 909         uint32_t *p;
 910
 911         RESERVE_SPACE(4+sizeof(stateid->data));
 912         WRITE32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
 913         WRITEMEM(stateid->data, sizeof(stateid->data));
 914         encode_string(xdr, name->len, name->name);
 915 }
 916
 917 static int encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg)
 918 {
 919         encode_openhdr(xdr, arg);
 920         encode_opentype(xdr, arg);
 921         switch (arg->claim) {
 922                 case NFS4_OPEN_CLAIM_NULL:
 923                         encode_claim_null(xdr, arg->name);
 924                         break;
 925                 case NFS4_OPEN_CLAIM_PREVIOUS:
 926                         encode_claim_previous(xdr, arg->u.delegation_type);
 927                         break;
 928                 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
 929                         encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
 930                         break;
 931                 default:
 932                         BUG();
 933         }
 934         return 0;
 935 }
 936
 937 static int encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg)
 938 {
 939         uint32_t *p;
 940
 941         RESERVE_SPACE(8+sizeof(arg->stateid.data));
 942         WRITE32(OP_OPEN_CONFIRM);
 943         WRITEMEM(arg->stateid.data, sizeof(arg->stateid.data));
 944         WRITE32(arg->seqid);
 945
 946         return 0;
 947 }
 948
 949 static int encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg)
 950 {
 951         uint32_t *p;
 952
 953         RESERVE_SPACE(8+sizeof(arg->stateid.data));
 954         WRITE32(OP_OPEN_DOWNGRADE);
 955         WRITEMEM(arg->stateid.data, sizeof(arg->stateid.data));
 956         WRITE32(arg->seqid);
 957         encode_share_access(xdr, arg->open_flags);
 958         return 0;
 959 }
 960
 961 static int
 962 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh)
 963 {
 964         int len = fh->size;
 965         uint32_t *p;
 966
 967         RESERVE_SPACE(8 + len);
 968         WRITE32(OP_PUTFH);
 969         WRITE32(len);
 970         WRITEMEM(fh->data, len);
 971
 972         return 0;
 973 }
 974
 975 static int encode_putrootfh(struct xdr_stream *xdr)
 976 {
 977         uint32_t *p;
 978
 979         RESERVE_SPACE(4);
 980         WRITE32(OP_PUTROOTFH);
 981
 982         return 0;
 983 }
 984
 985 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx)
 986 {
 987         nfs4_stateid stateid;
 988         uint32_t *p;
 989
 990         RESERVE_SPACE(16);
 991         if (ctx->state != NULL) {
 992                 nfs4_copy_stateid(&stateid, ctx->state, ctx->lockowner);
 993                 WRITEMEM(stateid.data, sizeof(stateid.data));
 994         } else
 995                 WRITEMEM(zero_stateid.data, sizeof(zero_stateid.data));
 996 }
 997
 998 static int encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args)
 999 {
1000         uint32_t *p;
1001
1002         RESERVE_SPACE(4);
1003         WRITE32(OP_READ);
1004
1005         encode_stateid(xdr, args->context);
1006
1007         RESERVE_SPACE(12);
1008         WRITE64(args->offset);
1009         WRITE32(args->count);
1010
1011         return 0;
1012 }
1013
1014 static int encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req)
1015 {
1016         struct rpc_auth *auth = req->rq_task->tk_auth;
1017         uint32_t attrs[2] = {
1018                 FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID,
1019                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1020         };
1021         int replen;
1022         uint32_t *p;
1023
1024         RESERVE_SPACE(32+sizeof(nfs4_verifier));
1025         WRITE32(OP_READDIR);
1026         WRITE64(readdir->cookie);
1027         WRITEMEM(readdir->verifier.data, sizeof(readdir->verifier.data));
1028         WRITE32(readdir->count >> 1);  /* We're not doing readdirplus */
1029         WRITE32(readdir->count);
1030         WRITE32(2);
1031         /* Switch to mounted_on_fileid if the server supports it */
1032         if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
1033                 attrs[0] &= ~FATTR4_WORD0_FILEID;
1034         else
1035                 attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
1036         WRITE32(attrs[0] & readdir->bitmask[0]);
1037         WRITE32(attrs[1] & readdir->bitmask[1]);
1038         dprintk("%s: cookie = %Lu, verifier = 0x%x%x, bitmap = 0x%x%x\n",
1039                         __FUNCTION__,
1040                         (unsigned long long)readdir->cookie,
1041                         ((u32 *)readdir->verifier.data)[0],
1042                         ((u32 *)readdir->verifier.data)[1],
1043                         attrs[0] & readdir->bitmask[0],
1044                         attrs[1] & readdir->bitmask[1]);
1045
1046         /* set up reply kvec
1047          *    toplevel_status + taglen + rescount + OP_PUTFH + status
1048          *      + OP_READDIR + status + verifer(2)  = 9
1049          */
1050         replen = (RPC_REPHDRSIZE + auth->au_rslack + 9) << 2;
1051         xdr_inline_pages(&req->rq_rcv_buf, replen, readdir->pages,
1052                          readdir->pgbase, readdir->count);
1053         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
1054                         __FUNCTION__, replen, readdir->pages,
1055                         readdir->pgbase, readdir->count);
1056
1057         return 0;
1058 }
1059
1060 static int encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req)
1061 {
1062         struct rpc_auth *auth = req->rq_task->tk_auth;
1063         unsigned int replen;
1064         uint32_t *p;
1065
1066         RESERVE_SPACE(4);
1067         WRITE32(OP_READLINK);
1068
1069         /* set up reply kvec
1070          *    toplevel_status + taglen + rescount + OP_PUTFH + status
1071          *      + OP_READLINK + status + string length = 8
1072          */
1073         replen = (RPC_REPHDRSIZE + auth->au_rslack + 8) << 2;
1074         xdr_inline_pages(&req->rq_rcv_buf, replen, readlink->pages,
1075                         readlink->pgbase, readlink->pglen);
1076
1077         return 0;
1078 }
1079
1080 static int encode_remove(struct xdr_stream *xdr, const struct qstr *name)
1081 {
1082         uint32_t *p;
1083
1084         RESERVE_SPACE(8 + name->len);
1085         WRITE32(OP_REMOVE);
1086         WRITE32(name->len);
1087         WRITEMEM(name->name, name->len);
1088
1089         return 0;
1090 }
1091
1092 static int encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname)
1093 {
1094         uint32_t *p;
1095
1096         RESERVE_SPACE(8 + oldname->len);
1097         WRITE32(OP_RENAME);
1098         WRITE32(oldname->len);
1099         WRITEMEM(oldname->name, oldname->len);
1100
1101         RESERVE_SPACE(4 + newname->len);
1102         WRITE32(newname->len);
1103         WRITEMEM(newname->name, newname->len);
1104
1105         return 0;
1106 }
1107
1108 static int encode_renew(struct xdr_stream *xdr, const struct nfs4_client *client_stateid)
1109 {
1110         uint32_t *p;
1111
1112         RESERVE_SPACE(12);
1113         WRITE32(OP_RENEW);
1114         WRITE64(client_stateid->cl_clientid);
1115
1116         return 0;
1117 }
1118
1119 static int
1120 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg)
1121 {
1122         uint32_t *p;
1123
1124         RESERVE_SPACE(4+sizeof(zero_stateid.data));
1125         WRITE32(OP_SETATTR);
1126         WRITEMEM(zero_stateid.data, sizeof(zero_stateid.data));
1127         RESERVE_SPACE(2*4);
1128         WRITE32(1);
1129         WRITE32(FATTR4_WORD0_ACL);
1130         if (arg->acl_len % 4)
1131                 return -EINVAL;
1132         RESERVE_SPACE(4);
1133         WRITE32(arg->acl_len);
1134         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1135         return 0;
1136 }
1137
1138 static int
1139 encode_savefh(struct xdr_stream *xdr)
1140 {
1141         uint32_t *p;
1142
1143         RESERVE_SPACE(4);
1144         WRITE32(OP_SAVEFH);
1145
1146         return 0;
1147 }
1148
1149 static int encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server)
1150 {
1151         int status;
1152         uint32_t *p;
1153
1154         RESERVE_SPACE(4+sizeof(arg->stateid.data));
1155         WRITE32(OP_SETATTR);
1156         WRITEMEM(arg->stateid.data, sizeof(arg->stateid.data));
1157
1158         if ((status = encode_attrs(xdr, arg->iap, server)))
1159                 return status;
1160
1161         return 0;
1162 }
1163
1164 static int encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid)
1165 {
1166         uint32_t *p;
1167
1168         RESERVE_SPACE(4 + sizeof(setclientid->sc_verifier->data));
1169         WRITE32(OP_SETCLIENTID);
1170         WRITEMEM(setclientid->sc_verifier->data, sizeof(setclientid->sc_verifier->data));
1171
1172         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1173         RESERVE_SPACE(4);
1174         WRITE32(setclientid->sc_prog);
1175         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1176         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1177         RESERVE_SPACE(4);
1178         WRITE32(setclientid->sc_cb_ident);
1179
1180         return 0;
1181 }
1182
1183 static int encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_client *client_state)
1184 {
1185         uint32_t *p;
1186
1187         RESERVE_SPACE(12 + sizeof(client_state->cl_confirm.data));
1188         WRITE32(OP_SETCLIENTID_CONFIRM);
1189         WRITE64(client_state->cl_clientid);
1190         WRITEMEM(client_state->cl_confirm.data, sizeof(client_state->cl_confirm.data));
1191
1192         return 0;
1193 }
1194
1195 static int encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args)
1196 {
1197         uint32_t *p;
1198
1199         RESERVE_SPACE(4);
1200         WRITE32(OP_WRITE);
1201
1202         encode_stateid(xdr, args->context);
1203
1204         RESERVE_SPACE(16);
1205         WRITE64(args->offset);
1206         WRITE32(args->stable);
1207         WRITE32(args->count);
1208
1209         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1210
1211         return 0;
1212 }
1213
1214 static int encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1215 {
1216         uint32_t *p;
1217
1218         RESERVE_SPACE(20);
1219
1220         WRITE32(OP_DELEGRETURN);
1221         WRITEMEM(stateid->data, sizeof(stateid->data));
1222         return 0;
1223
1224 }
1225 /*
1226  * END OF "GENERIC" ENCODE ROUTINES.
1227  */
1228
1229 /*
1230  * Encode an ACCESS request
1231  */
1232 static int nfs4_xdr_enc_access(struct rpc_rqst *req, uint32_t *p, const struct nfs4_accessargs *args)
1233 {
1234         struct xdr_stream xdr;
1235         struct compound_hdr hdr = {
1236                 .nops = 2,
1237         };
1238         int status;
1239
1240         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1241         encode_compound_hdr(&xdr, &hdr);
1242         if ((status = encode_putfh(&xdr, args->fh)) == 0)
1243                 status = encode_access(&xdr, args->access);
1244         return status;
1245 }
1246
1247 /*
1248  * Encode LOOKUP request
1249  */
1250 static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, uint32_t *p, const struct nfs4_lookup_arg *args)
1251 {
1252         struct xdr_stream xdr;
1253         struct compound_hdr hdr = {
1254                 .nops = 4,
1255         };
1256         int status;
1257
1258         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1259         encode_compound_hdr(&xdr, &hdr);
1260         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1261                 goto out;
1262         if ((status = encode_lookup(&xdr, args->name)) != 0)
1263                 goto out;
1264         if ((status = encode_getfh(&xdr)) != 0)
1265                 goto out;
1266         status = encode_getfattr(&xdr, args->bitmask);
1267 out:
1268         return status;
1269 }
1270
1271 /*
1272  * Encode LOOKUP_ROOT request
1273  */
1274 static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, uint32_t *p, const struct nfs4_lookup_root_arg *args)
1275 {
1276         struct xdr_stream xdr;
1277         struct compound_hdr hdr = {
1278                 .nops = 3,
1279         };
1280         int status;
1281
1282         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1283         encode_compound_hdr(&xdr, &hdr);
1284         if ((status = encode_putrootfh(&xdr)) != 0)
1285                 goto out;
1286         if ((status = encode_getfh(&xdr)) == 0)
1287                 status = encode_getfattr(&xdr, args->bitmask);
1288 out:
1289         return status;
1290 }
1291
1292 /*
1293  * Encode REMOVE request
1294  */
1295 static int nfs4_xdr_enc_remove(struct rpc_rqst *req, uint32_t *p, const struct nfs4_remove_arg *args)
1296 {
1297         struct xdr_stream xdr;
1298         struct compound_hdr hdr = {
1299                 .nops = 2,
1300         };
1301         int status;
1302
1303         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1304         encode_compound_hdr(&xdr, &hdr);
1305         if ((status = encode_putfh(&xdr, args->fh)) == 0)
1306                 status = encode_remove(&xdr, args->name);
1307         return status;
1308 }
1309
1310 /*
1311  * Encode RENAME request
1312  */
1313 static int nfs4_xdr_enc_rename(struct rpc_rqst *req, uint32_t *p, const struct nfs4_rename_arg *args)
1314 {
1315         struct xdr_stream xdr;
1316         struct compound_hdr hdr = {
1317                 .nops = 4,
1318         };
1319         int status;
1320
1321         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1322         encode_compound_hdr(&xdr, &hdr);
1323         if ((status = encode_putfh(&xdr, args->old_dir)) != 0)
1324                 goto out;
1325         if ((status = encode_savefh(&xdr)) != 0)
1326                 goto out;
1327         if ((status = encode_putfh(&xdr, args->new_dir)) != 0)
1328                 goto out;
1329         status = encode_rename(&xdr, args->old_name, args->new_name);
1330 out:
1331         return status;
1332 }
1333
1334 /*
1335  * Encode LINK request
1336  */
1337 static int nfs4_xdr_enc_link(struct rpc_rqst *req, uint32_t *p, const struct nfs4_link_arg *args)
1338 {
1339         struct xdr_stream xdr;
1340         struct compound_hdr hdr = {
1341                 .nops = 4,
1342         };
1343         int status;
1344
1345         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1346         encode_compound_hdr(&xdr, &hdr);
1347         if ((status = encode_putfh(&xdr, args->fh)) != 0)
1348                 goto out;
1349         if ((status = encode_savefh(&xdr)) != 0)
1350                 goto out;
1351         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1352                 goto out;
1353         status = encode_link(&xdr, args->name);
1354 out:
1355         return status;
1356 }
1357
1358 /*
1359  * Encode CREATE request
1360  */
1361 static int nfs4_xdr_enc_create(struct rpc_rqst *req, uint32_t *p, const struct nfs4_create_arg *args)
1362 {
1363         struct xdr_stream xdr;
1364         struct compound_hdr hdr = {
1365                 .nops = 4,
1366         };
1367         int status;
1368
1369         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1370         encode_compound_hdr(&xdr, &hdr);
1371         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1372                 goto out;
1373         if ((status = encode_create(&xdr, args)) != 0)
1374                 goto out;
1375         if ((status = encode_getfh(&xdr)) != 0)
1376                 goto out;
1377         status = encode_getfattr(&xdr, args->bitmask);
1378 out:
1379         return status;
1380 }
1381
1382 /*
1383  * Encode SYMLINK request
1384  */
1385 static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, uint32_t *p, const struct nfs4_create_arg *args)
1386 {
1387         return nfs4_xdr_enc_create(req, p, args);
1388 }
1389
1390 /*
1391  * Encode GETATTR request
1392  */
1393 static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, uint32_t *p, const struct nfs4_getattr_arg *args)
1394 {
1395         struct xdr_stream xdr;
1396         struct compound_hdr hdr = {
1397                 .nops = 2,
1398         };
1399         int status;
1400
1401         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1402         encode_compound_hdr(&xdr, &hdr);
1403         if ((status = encode_putfh(&xdr, args->fh)) == 0)
1404                 status = encode_getfattr(&xdr, args->bitmask);
1405         return status;
1406 }
1407
1408 /*
1409  * Encode a CLOSE request
1410  */
1411 static int nfs4_xdr_enc_close(struct rpc_rqst *req, uint32_t *p, struct nfs_closeargs *args)
1412 {
1413         struct xdr_stream xdr;
1414         struct compound_hdr hdr = {
1415                 .nops   = 2,
1416         };
1417         int status;
1418
1419         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1420         encode_compound_hdr(&xdr, &hdr);
1421         status = encode_putfh(&xdr, args->fh);
1422         if(status)
1423                 goto out;
1424         status = encode_close(&xdr, args);
1425 out:
1426         return status;
1427 }
1428
1429 /*
1430  * Encode an OPEN request
1431  */
1432 static int nfs4_xdr_enc_open(struct rpc_rqst *req, uint32_t *p, struct nfs_openargs *args)
1433 {
1434         struct xdr_stream xdr;
1435         struct compound_hdr hdr = {
1436                 .nops = 4,
1437         };
1438         int status;
1439
1440         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1441         encode_compound_hdr(&xdr, &hdr);
1442         status = encode_putfh(&xdr, args->fh);
1443         if (status)
1444                 goto out;
1445         status = encode_open(&xdr, args);
1446         if (status)
1447                 goto out;
1448         status = encode_getfh(&xdr);
1449         if (status)
1450                 goto out;
1451         status = encode_getfattr(&xdr, args->bitmask);
1452 out:
1453         return status;
1454 }
1455
1456 /*
1457  * Encode an OPEN_CONFIRM request
1458  */
1459 static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, uint32_t *p, struct nfs_open_confirmargs *args)
1460 {
1461         struct xdr_stream xdr;
1462         struct compound_hdr hdr = {
1463                 .nops   = 2,
1464         };
1465         int status;
1466
1467         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1468         encode_compound_hdr(&xdr, &hdr);
1469         status = encode_putfh(&xdr, args->fh);
1470         if(status)
1471                 goto out;
1472         status = encode_open_confirm(&xdr, args);
1473 out:
1474         return status;
1475 }
1476
1477 /*
1478  * Encode an OPEN request with no attributes.
1479  */
1480 static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, uint32_t *p, struct nfs_openargs *args)
1481 {
1482         struct xdr_stream xdr;
1483         struct compound_hdr hdr = {
1484                 .nops   = 2,
1485         };
1486         int status;
1487
1488         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1489         encode_compound_hdr(&xdr, &hdr);
1490         status = encode_putfh(&xdr, args->fh);
1491         if (status)
1492                 goto out;
1493         status = encode_open(&xdr, args);
1494 out:
1495         return status;
1496 }
1497
1498 /*
1499  * Encode an OPEN_DOWNGRADE request
1500  */
1501 static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, uint32_t *p, struct nfs_closeargs *args)
1502 {
1503         struct xdr_stream xdr;
1504         struct compound_hdr hdr = {
1505                 .nops   = 2,
1506         };
1507         int status;
1508
1509         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1510         encode_compound_hdr(&xdr, &hdr);
1511         status = encode_putfh(&xdr, args->fh);
1512         if (status)
1513                 goto out;
1514         status = encode_open_downgrade(&xdr, args);
1515 out:
1516         return status;
1517 }
1518
1519 /*
1520  * Encode a LOCK request
1521  */
1522 static int nfs4_xdr_enc_lock(struct rpc_rqst *req, uint32_t *p, struct nfs_lockargs *args)
1523 {
1524         struct xdr_stream xdr;
1525         struct compound_hdr hdr = {
1526                 .nops   = 2,
1527         };
1528         int status;
1529
1530         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1531         encode_compound_hdr(&xdr, &hdr);
1532         status = encode_putfh(&xdr, args->fh);
1533         if(status)
1534                 goto out;
1535         status = encode_lock(&xdr, args);
1536 out:
1537         return status;
1538 }
1539
1540 /*
1541  * Encode a LOCKT request
1542  */
1543 static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, uint32_t *p, struct nfs_lockargs *args)
1544 {
1545         struct xdr_stream xdr;
1546         struct compound_hdr hdr = {
1547                 .nops   = 2,
1548         };
1549         int status;
1550
1551         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1552         encode_compound_hdr(&xdr, &hdr);
1553         status = encode_putfh(&xdr, args->fh);
1554         if(status)
1555                 goto out;
1556         status = encode_lockt(&xdr, args);
1557 out:
1558         return status;
1559 }
1560
1561 /*
1562  * Encode a LOCKU request
1563  */
1564 static int nfs4_xdr_enc_locku(struct rpc_rqst *req, uint32_t *p, struct nfs_lockargs *args)
1565 {
1566         struct xdr_stream xdr;
1567         struct compound_hdr hdr = {
1568                 .nops   = 2,
1569         };
1570         int status;
1571
1572         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1573         encode_compound_hdr(&xdr, &hdr);
1574         status = encode_putfh(&xdr, args->fh);
1575         if(status)
1576                 goto out;
1577         status = encode_locku(&xdr, args);
1578 out:
1579         return status;
1580 }
1581
1582 /*
1583  * Encode a READLINK request
1584  */
1585 static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, uint32_t *p, const struct nfs4_readlink *args)
1586 {
1587         struct xdr_stream xdr;
1588         struct compound_hdr hdr = {
1589                 .nops = 2,
1590         };
1591         int status;
1592
1593         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1594         encode_compound_hdr(&xdr, &hdr);
1595         status = encode_putfh(&xdr, args->fh);
1596         if(status)
1597                 goto out;
1598         status = encode_readlink(&xdr, args, req);
1599 out:
1600         return status;
1601 }
1602
1603 /*
1604  * Encode a READDIR request
1605  */
1606 static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, uint32_t *p, const struct nfs4_readdir_arg *args)
1607 {
1608         struct xdr_stream xdr;
1609         struct compound_hdr hdr = {
1610                 .nops = 2,
1611         };
1612         int status;
1613
1614         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1615         encode_compound_hdr(&xdr, &hdr);
1616         status = encode_putfh(&xdr, args->fh);
1617         if(status)
1618                 goto out;
1619         status = encode_readdir(&xdr, args, req);
1620 out:
1621         return status;
1622 }
1623
1624 /*
1625  * Encode a READ request
1626  */
1627 static int nfs4_xdr_enc_read(struct rpc_rqst *req, uint32_t *p, struct nfs_readargs *args)
1628 {
1629         struct rpc_auth *auth = req->rq_task->tk_auth;
1630         struct xdr_stream xdr;
1631         struct compound_hdr hdr = {
1632                 .nops = 2,
1633         };
1634         int replen, status;
1635
1636         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1637         encode_compound_hdr(&xdr, &hdr);
1638         status = encode_putfh(&xdr, args->fh);
1639         if (status)
1640                 goto out;
1641         status = encode_read(&xdr, args);
1642         if (status)
1643                 goto out;
1644
1645         /* set up reply kvec
1646          *    toplevel status + taglen=0 + rescount + OP_PUTFH + status
1647          *       + OP_READ + status + eof + datalen = 9
1648          */
1649         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_read_sz) << 2;
1650         xdr_inline_pages(&req->rq_rcv_buf, replen,
1651                          args->pages, args->pgbase, args->count);
1652 out:
1653         return status;
1654 }
1655
1656 /*
1657  * Encode an SETATTR request
1658  */
1659 static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, uint32_t *p, struct nfs_setattrargs *args)
1660
1661 {
1662         struct xdr_stream xdr;
1663         struct compound_hdr hdr = {
1664                 .nops   = 3,
1665         };
1666         int status;
1667
1668         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1669         encode_compound_hdr(&xdr, &hdr);
1670         status = encode_putfh(&xdr, args->fh);
1671         if(status)
1672                 goto out;
1673         status = encode_setattr(&xdr, args, args->server);
1674         if(status)
1675                 goto out;
1676         status = encode_getfattr(&xdr, args->bitmask);
1677 out:
1678         return status;
1679 }
1680
1681 /*
1682  * Encode a GETACL request
1683  */
1684 static int
1685 nfs4_xdr_enc_getacl(struct rpc_rqst *req, uint32_t *p,
1686                 struct nfs_getaclargs *args)
1687 {
1688         struct xdr_stream xdr;
1689         struct rpc_auth *auth = req->rq_task->tk_auth;
1690         struct compound_hdr hdr = {
1691                 .nops   = 2,
1692         };
1693         int replen, status;
1694
1695         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1696         encode_compound_hdr(&xdr, &hdr);
1697         status = encode_putfh(&xdr, args->fh);
1698         if (status)
1699                 goto out;
1700         status = encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0);
1701         /* set up reply buffer: */
1702         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_getacl_sz) << 2;
1703         xdr_inline_pages(&req->rq_rcv_buf, replen,
1704                 args->acl_pages, args->acl_pgbase, args->acl_len);
1705 out:
1706         return status;
1707 }
1708
1709 /*
1710  * Encode a WRITE request
1711  */
1712 static int nfs4_xdr_enc_write(struct rpc_rqst *req, uint32_t *p, struct nfs_writeargs *args)
1713 {
1714         struct xdr_stream xdr;
1715         struct compound_hdr hdr = {
1716                 .nops = 2,
1717         };
1718         int status;
1719
1720         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1721         encode_compound_hdr(&xdr, &hdr);
1722         status = encode_putfh(&xdr, args->fh);
1723         if (status)
1724                 goto out;
1725         status = encode_write(&xdr, args);
1726 out:
1727         return status;
1728 }
1729
1730 /*
1731  *  a COMMIT request
1732  */
1733 static int nfs4_xdr_enc_commit(struct rpc_rqst *req, uint32_t *p, struct nfs_writeargs *args)
1734 {
1735         struct xdr_stream xdr;
1736         struct compound_hdr hdr = {
1737                 .nops = 2,
1738         };
1739         int status;
1740
1741         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1742         encode_compound_hdr(&xdr, &hdr);
1743         status = encode_putfh(&xdr, args->fh);
1744         if (status)
1745                 goto out;
1746         status = encode_commit(&xdr, args);
1747 out:
1748         return status;
1749 }
1750
1751 /*
1752  * FSINFO request
1753  */
1754 static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, uint32_t *p, struct nfs4_fsinfo_arg *args)
1755 {
1756         struct xdr_stream xdr;
1757         struct compound_hdr hdr = {
1758                 .nops   = 2,
1759         };
1760         int status;
1761
1762         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1763         encode_compound_hdr(&xdr, &hdr);
1764         status = encode_putfh(&xdr, args->fh);
1765         if (!status)
1766                 status = encode_fsinfo(&xdr, args->bitmask);
1767         return status;
1768 }
1769
1770 /*
1771  * a PATHCONF request
1772  */
1773 static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, uint32_t *p, const struct nfs4_pathconf_arg *args)
1774 {
1775         struct xdr_stream xdr;
1776         struct compound_hdr hdr = {
1777                 .nops = 2,
1778         };
1779         int status;
1780
1781         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1782         encode_compound_hdr(&xdr, &hdr);
1783         status = encode_putfh(&xdr, args->fh);
1784         if (!status)
1785                 status = encode_getattr_one(&xdr,
1786                                 args->bitmask[0] & nfs4_pathconf_bitmap[0]);
1787         return status;
1788 }
1789
1790 /*
1791  * a STATFS request
1792  */
1793 static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, uint32_t *p, const struct nfs4_statfs_arg *args)
1794 {
1795         struct xdr_stream xdr;
1796         struct compound_hdr hdr = {
1797                 .nops = 2,
1798         };
1799         int status;
1800
1801         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1802         encode_compound_hdr(&xdr, &hdr);
1803         status = encode_putfh(&xdr, args->fh);
1804         if (status == 0)
1805                 status = encode_getattr_two(&xdr,
1806                                 args->bitmask[0] & nfs4_statfs_bitmap[0],
1807                                 args->bitmask[1] & nfs4_statfs_bitmap[1]);
1808         return status;
1809 }
1810
1811 /*
1812  * GETATTR_BITMAP request
1813  */
1814 static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, uint32_t *p, const struct nfs_fh *fhandle)
1815 {
1816         struct xdr_stream xdr;
1817         struct compound_hdr hdr = {
1818                 .nops = 2,
1819         };
1820         int status;
1821
1822         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1823         encode_compound_hdr(&xdr, &hdr);
1824         status = encode_putfh(&xdr, fhandle);
1825         if (status == 0)
1826                 status = encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
1827                                 FATTR4_WORD0_LINK_SUPPORT|
1828                                 FATTR4_WORD0_SYMLINK_SUPPORT|
1829                                 FATTR4_WORD0_ACLSUPPORT);
1830         return status;
1831 }
1832
1833 /*
1834  * a RENEW request
1835  */
1836 static int nfs4_xdr_enc_renew(struct rpc_rqst *req, uint32_t *p, struct nfs4_client *clp)
1837 {
1838         struct xdr_stream xdr;
1839         struct compound_hdr hdr = {
1840                 .nops   = 1,
1841         };
1842
1843         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1844         encode_compound_hdr(&xdr, &hdr);
1845         return encode_renew(&xdr, clp);
1846 }
1847
1848 /*
1849  * a SETCLIENTID request
1850  */
1851 static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, uint32_t *p, struct nfs4_setclientid *sc)
1852 {
1853         struct xdr_stream xdr;
1854         struct compound_hdr hdr = {
1855                 .nops   = 1,
1856         };
1857
1858         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1859         encode_compound_hdr(&xdr, &hdr);
1860         return encode_setclientid(&xdr, sc);
1861 }
1862
1863 /*
1864  * a SETCLIENTID_CONFIRM request
1865  */
1866 static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, uint32_t *p, struct nfs4_client *clp)
1867 {
1868         struct xdr_stream xdr;
1869         struct compound_hdr hdr = {
1870                 .nops   = 3,
1871         };
1872         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
1873         int status;
1874
1875         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1876         encode_compound_hdr(&xdr, &hdr);
1877         status = encode_setclientid_confirm(&xdr, clp);
1878         if (!status)
1879                 status = encode_putrootfh(&xdr);
1880         if (!status)
1881                 status = encode_fsinfo(&xdr, lease_bitmap);
1882         return status;
1883 }
1884
1885 /*
1886  * DELEGRETURN request
1887  */
1888 static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, uint32_t *p, const struct nfs4_delegreturnargs *args)
1889 {
1890         struct xdr_stream xdr;
1891         struct compound_hdr hdr = {
1892                 .nops = 2,
1893         };
1894         int status;
1895
1896         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1897         encode_compound_hdr(&xdr, &hdr);
1898         if ((status = encode_putfh(&xdr, args->fhandle)) == 0)
1899                 status = encode_delegreturn(&xdr, args->stateid);
1900         return status;
1901 }
1902
1903 /*
1904  * START OF "GENERIC" DECODE ROUTINES.
1905  *   These may look a little ugly since they are imported from a "generic"
1906  * set of XDR encode/decode routines which are intended to be shared by
1907  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
1908  *
1909  * If the pain of reading these is too great, it should be a straightforward
1910  * task to translate them into Linux-specific versions which are more
1911  * consistent with the style used in NFSv2/v3...
1912  */
1913 #define READ32(x)         (x) = ntohl(*p++)
1914 #define READ64(x)         do {                  \
1915         (x) = (u64)ntohl(*p++) << 32;           \
1916         (x) |= ntohl(*p++);                     \
1917 } while (0)
1918 #define READTIME(x)       do {                  \
1919         p++;                                    \
1920         (x.tv_sec) = ntohl(*p++);               \
1921         (x.tv_nsec) = ntohl(*p++);              \
1922 } while (0)
1923 #define COPYMEM(x,nbytes) do {                  \
1924         memcpy((x), p, nbytes);                 \
1925         p += XDR_QUADLEN(nbytes);               \
1926 } while (0)
1927
1928 #define READ_BUF(nbytes)  do { \
1929         p = xdr_inline_decode(xdr, nbytes); \
1930         if (!p) { \
1931                 printk(KERN_WARNING "%s: reply buffer overflowed in line %d.", \
1932                                 __FUNCTION__, __LINE__); \
1933                 return -EIO; \
1934         } \
1935 } while (0)
1936
1937 static int decode_opaque_inline(struct xdr_stream *xdr, uint32_t *len, char **string)
1938 {
1939         uint32_t *p;
1940
1941         READ_BUF(4);
1942         READ32(*len);
1943         READ_BUF(*len);
1944         *string = (char *)p;
1945         return 0;
1946 }
1947
1948 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
1949 {
1950         uint32_t *p;
1951
1952         READ_BUF(8);
1953         READ32(hdr->status);
1954         READ32(hdr->taglen);
1955
1956         READ_BUF(hdr->taglen + 4);
1957         hdr->tag = (char *)p;
1958         p += XDR_QUADLEN(hdr->taglen);
1959         READ32(hdr->nops);
1960         return 0;
1961 }
1962
1963 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
1964 {
1965         uint32_t *p;
1966         uint32_t opnum;
1967         int32_t nfserr;
1968
1969         READ_BUF(8);
1970         READ32(opnum);
1971         if (opnum != expected) {
1972                 printk(KERN_NOTICE
1973                                 "nfs4_decode_op_hdr: Server returned operation"
1974                                 " %d but we issued a request for %d\n",
1975                                 opnum, expected);
1976                 return -EIO;
1977         }
1978         READ32(nfserr);
1979         if (nfserr != NFS_OK)
1980                 return -nfs_stat_to_errno(nfserr);
1981         return 0;
1982 }
1983
1984 /* Dummy routine */
1985 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs4_client *clp)
1986 {
1987         uint32_t *p;
1988         uint32_t strlen;
1989         char *str;
1990
1991         READ_BUF(12);
1992         return decode_opaque_inline(xdr, &strlen, &str);
1993 }
1994
1995 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
1996 {
1997         uint32_t bmlen, *p;
1998
1999         READ_BUF(4);
2000         READ32(bmlen);
2001
2002         bitmap[0] = bitmap[1] = 0;
2003         READ_BUF((bmlen << 2));
2004         if (bmlen > 0) {
2005                 READ32(bitmap[0]);
2006                 if (bmlen > 1)
2007                         READ32(bitmap[1]);
2008         }
2009         return 0;
2010 }
2011
2012 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, uint32_t **savep)
2013 {
2014         uint32_t *p;
2015
2016         READ_BUF(4);
2017         READ32(*attrlen);
2018         *savep = xdr->p;
2019         return 0;
2020 }
2021
2022 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2023 {
2024         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2025                 decode_attr_bitmap(xdr, bitmask);
2026                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2027         } else
2028                 bitmask[0] = bitmask[1] = 0;
2029         dprintk("%s: bitmask=0x%x%x\n", __FUNCTION__, bitmask[0], bitmask[1]);
2030         return 0;
2031 }
2032
2033 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2034 {
2035         uint32_t *p;
2036
2037         *type = 0;
2038         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2039                 return -EIO;
2040         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2041                 READ_BUF(4);
2042                 READ32(*type);
2043                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2044                         dprintk("%s: bad type %d\n", __FUNCTION__, *type);
2045                         return -EIO;
2046                 }
2047                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2048         }
2049         dprintk("%s: type=0%o\n", __FUNCTION__, nfs_type2fmt[*type].nfs2type);
2050         return 0;
2051 }
2052
2053 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2054 {
2055         uint32_t *p;
2056
2057         *change = 0;
2058         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2059                 return -EIO;
2060         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2061                 READ_BUF(8);
2062                 READ64(*change);
2063                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2064         }
2065         dprintk("%s: change attribute=%Lu\n", __FUNCTION__,
2066                         (unsigned long long)*change);
2067         return 0;
2068 }
2069
2070 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2071 {
2072         uint32_t *p;
2073
2074         *size = 0;
2075         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2076                 return -EIO;
2077         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2078                 READ_BUF(8);
2079                 READ64(*size);
2080                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2081         }
2082         dprintk("%s: file size=%Lu\n", __FUNCTION__, (unsigned long long)*size);
2083         return 0;
2084 }
2085
2086 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2087 {
2088         uint32_t *p;
2089
2090         *res = 0;
2091         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2092                 return -EIO;
2093         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2094                 READ_BUF(4);
2095                 READ32(*res);
2096                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2097         }
2098         dprintk("%s: link support=%s\n", __FUNCTION__, *res == 0 ? "false" : "true");
2099         return 0;
2100 }
2101
2102 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2103 {
2104         uint32_t *p;
2105
2106         *res = 0;
2107         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2108                 return -EIO;
2109         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2110                 READ_BUF(4);
2111                 READ32(*res);
2112                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2113         }
2114         dprintk("%s: symlink support=%s\n", __FUNCTION__, *res == 0 ? "false" : "true");
2115         return 0;
2116 }
2117
2118 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fsid *fsid)
2119 {
2120         uint32_t *p;
2121
2122         fsid->major = 0;
2123         fsid->minor = 0;
2124         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2125                 return -EIO;
2126         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2127                 READ_BUF(16);
2128                 READ64(fsid->major);
2129                 READ64(fsid->minor);
2130                 bitmap[0] &= ~FATTR4_WORD0_FSID;
2131         }
2132         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __FUNCTION__,
2133                         (unsigned long long)fsid->major,
2134                         (unsigned long long)fsid->minor);
2135         return 0;
2136 }
2137
2138 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2139 {
2140         uint32_t *p;
2141
2142         *res = 60;
2143         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2144                 return -EIO;
2145         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2146                 READ_BUF(4);
2147                 READ32(*res);
2148                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2149         }
2150         dprintk("%s: file size=%u\n", __FUNCTION__, (unsigned int)*res);
2151         return 0;
2152 }
2153
2154 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2155 {
2156         uint32_t *p;
2157
2158         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2159         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2160                 return -EIO;
2161         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2162                 READ_BUF(4);
2163                 READ32(*res);
2164                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2165         }
2166         dprintk("%s: ACLs supported=%u\n", __FUNCTION__, (unsigned int)*res);
2167         return 0;
2168 }
2169
2170 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2171 {
2172         uint32_t *p;
2173
2174         *fileid = 0;
2175         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2176                 return -EIO;
2177         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2178                 READ_BUF(8);
2179                 READ64(*fileid);
2180                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2181         }
2182         dprintk("%s: fileid=%Lu\n", __FUNCTION__, (unsigned long long)*fileid);
2183         return 0;
2184 }
2185
2186 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2187 {
2188         uint32_t *p;
2189         int status = 0;
2190
2191         *res = 0;
2192         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
2193                 return -EIO;
2194         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
2195                 READ_BUF(8);
2196                 READ64(*res);
2197                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
2198         }
2199         dprintk("%s: files avail=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2200         return status;
2201 }
2202
2203 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2204 {
2205         uint32_t *p;
2206         int status = 0;
2207
2208         *res = 0;
2209         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
2210                 return -EIO;
2211         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
2212                 READ_BUF(8);
2213                 READ64(*res);
2214                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
2215         }
2216         dprintk("%s: files free=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2217         return status;
2218 }
2219
2220 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2221 {
2222         uint32_t *p;
2223         int status = 0;
2224
2225         *res = 0;
2226         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
2227                 return -EIO;
2228         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
2229                 READ_BUF(8);
2230                 READ64(*res);
2231                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
2232         }
2233         dprintk("%s: files total=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2234         return status;
2235 }
2236
2237 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2238 {
2239         uint32_t *p;
2240         int status = 0;
2241
2242         *res = 0;
2243         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
2244                 return -EIO;
2245         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
2246                 READ_BUF(8);
2247                 READ64(*res);
2248                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
2249         }
2250         dprintk("%s: maxfilesize=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2251         return status;
2252 }
2253
2254 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
2255 {
2256         uint32_t *p;
2257         int status = 0;
2258
2259         *maxlink = 1;
2260         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
2261                 return -EIO;
2262         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
2263                 READ_BUF(4);
2264                 READ32(*maxlink);
2265                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
2266         }
2267         dprintk("%s: maxlink=%u\n", __FUNCTION__, *maxlink);
2268         return status;
2269 }
2270
2271 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
2272 {
2273         uint32_t *p;
2274         int status = 0;
2275
2276         *maxname = 1024;
2277         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
2278                 return -EIO;
2279         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
2280                 READ_BUF(4);
2281                 READ32(*maxname);
2282                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
2283         }
2284         dprintk("%s: maxname=%u\n", __FUNCTION__, *maxname);
2285         return status;
2286 }
2287
2288 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2289 {
2290         uint32_t *p;
2291         int status = 0;
2292
2293         *res = 1024;
2294         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
2295                 return -EIO;
2296         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
2297                 uint64_t maxread;
2298                 READ_BUF(8);
2299                 READ64(maxread);
2300                 if (maxread > 0x7FFFFFFF)
2301                         maxread = 0x7FFFFFFF;
2302                 *res = (uint32_t)maxread;
2303                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
2304         }
2305         dprintk("%s: maxread=%lu\n", __FUNCTION__, (unsigned long)*res);
2306         return status;
2307 }
2308
2309 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2310 {
2311         uint32_t *p;
2312         int status = 0;
2313
2314         *res = 1024;
2315         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
2316                 return -EIO;
2317         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
2318                 uint64_t maxwrite;
2319                 READ_BUF(8);
2320                 READ64(maxwrite);
2321                 if (maxwrite > 0x7FFFFFFF)
2322                         maxwrite = 0x7FFFFFFF;
2323                 *res = (uint32_t)maxwrite;
2324                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
2325         }
2326         dprintk("%s: maxwrite=%lu\n", __FUNCTION__, (unsigned long)*res);
2327         return status;
2328 }
2329
2330 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *mode)
2331 {
2332         uint32_t *p;
2333
2334         *mode = 0;
2335         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
2336                 return -EIO;
2337         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
2338                 READ_BUF(4);
2339                 READ32(*mode);
2340                 *mode &= ~S_IFMT;
2341                 bitmap[1] &= ~FATTR4_WORD1_MODE;
2342         }
2343         dprintk("%s: file mode=0%o\n", __FUNCTION__, (unsigned int)*mode);
2344         return 0;
2345 }
2346
2347 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
2348 {
2349         uint32_t *p;
2350
2351         *nlink = 1;
2352         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
2353                 return -EIO;
2354         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
2355                 READ_BUF(4);
2356                 READ32(*nlink);
2357                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
2358         }
2359         dprintk("%s: nlink=%u\n", __FUNCTION__, (unsigned int)*nlink);
2360         return 0;
2361 }
2362
2363 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_client *clp, int32_t *uid)
2364 {
2365         uint32_t len, *p;
2366
2367         *uid = -2;
2368         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
2369                 return -EIO;
2370         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
2371                 READ_BUF(4);
2372                 READ32(len);
2373                 READ_BUF(len);
2374                 if (len < XDR_MAX_NETOBJ) {
2375                         if (nfs_map_name_to_uid(clp, (char *)p, len, uid) != 0)
2376                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
2377                                                 __FUNCTION__);
2378                 } else
2379                         printk(KERN_WARNING "%s: name too long (%u)!\n",
2380                                         __FUNCTION__, len);
2381                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
2382         }
2383         dprintk("%s: uid=%d\n", __FUNCTION__, (int)*uid);
2384         return 0;
2385 }
2386
2387 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_client *clp, int32_t *gid)
2388 {
2389         uint32_t len, *p;
2390
2391         *gid = -2;
2392         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
2393                 return -EIO;
2394         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
2395                 READ_BUF(4);
2396                 READ32(len);
2397                 READ_BUF(len);
2398                 if (len < XDR_MAX_NETOBJ) {
2399                         if (nfs_map_group_to_gid(clp, (char *)p, len, gid) != 0)
2400                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
2401                                                 __FUNCTION__);
2402                 } else
2403                         printk(KERN_WARNING "%s: name too long (%u)!\n",
2404                                         __FUNCTION__, len);
2405                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
2406         }
2407         dprintk("%s: gid=%d\n", __FUNCTION__, (int)*gid);
2408         return 0;
2409 }
2410
2411 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
2412 {
2413         uint32_t major = 0, minor = 0, *p;
2414
2415         *rdev = MKDEV(0,0);
2416         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
2417                 return -EIO;
2418         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
2419                 dev_t tmp;
2420
2421                 READ_BUF(8);
2422                 READ32(major);
2423                 READ32(minor);
2424                 tmp = MKDEV(major, minor);
2425                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
2426                         *rdev = tmp;
2427                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
2428         }
2429         dprintk("%s: rdev=(0x%x:0x%x)\n", __FUNCTION__, major, minor);
2430         return 0;
2431 }
2432
2433 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2434 {
2435         uint32_t *p;
2436         int status = 0;
2437
2438         *res = 0;
2439         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
2440                 return -EIO;
2441         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
2442                 READ_BUF(8);
2443                 READ64(*res);
2444                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
2445         }
2446         dprintk("%s: space avail=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2447         return status;
2448 }
2449
2450 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2451 {
2452         uint32_t *p;
2453         int status = 0;
2454
2455         *res = 0;
2456         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
2457                 return -EIO;
2458         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
2459                 READ_BUF(8);
2460                 READ64(*res);
2461                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
2462         }
2463         dprintk("%s: space free=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2464         return status;
2465 }
2466
2467 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2468 {
2469         uint32_t *p;
2470         int status = 0;
2471
2472         *res = 0;
2473         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
2474                 return -EIO;
2475         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
2476                 READ_BUF(8);
2477                 READ64(*res);
2478                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
2479         }
2480         dprintk("%s: space total=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2481         return status;
2482 }
2483
2484 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
2485 {
2486         uint32_t *p;
2487
2488         *used = 0;
2489         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
2490                 return -EIO;
2491         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
2492                 READ_BUF(8);
2493                 READ64(*used);
2494                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
2495         }
2496         dprintk("%s: space used=%Lu\n", __FUNCTION__,
2497                         (unsigned long long)*used);
2498         return 0;
2499 }
2500
2501 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
2502 {
2503         uint32_t *p;
2504         uint64_t sec;
2505         uint32_t nsec;
2506
2507         READ_BUF(12);
2508         READ64(sec);
2509         READ32(nsec);
2510         time->tv_sec = (time_t)sec;
2511         time->tv_nsec = (long)nsec;
2512         return 0;
2513 }
2514
2515 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2516 {
2517         int status = 0;
2518
2519         time->tv_sec = 0;
2520         time->tv_nsec = 0;
2521         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
2522                 return -EIO;
2523         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
2524                 status = decode_attr_time(xdr, time);
2525                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
2526         }
2527         dprintk("%s: atime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2528         return status;
2529 }
2530
2531 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2532 {
2533         int status = 0;
2534
2535         time->tv_sec = 0;
2536         time->tv_nsec = 0;
2537         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
2538                 return -EIO;
2539         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
2540                 status = decode_attr_time(xdr, time);
2541                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
2542         }
2543         dprintk("%s: ctime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2544         return status;
2545 }
2546
2547 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2548 {
2549         int status = 0;
2550
2551         time->tv_sec = 0;
2552         time->tv_nsec = 0;
2553         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
2554                 return -EIO;
2555         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
2556                 status = decode_attr_time(xdr, time);
2557                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
2558         }
2559         dprintk("%s: mtime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2560         return status;
2561 }
2562
2563 static int verify_attr_len(struct xdr_stream *xdr, uint32_t *savep, uint32_t attrlen)
2564 {
2565         unsigned int attrwords = XDR_QUADLEN(attrlen);
2566         unsigned int nwords = xdr->p - savep;
2567
2568         if (unlikely(attrwords != nwords)) {
2569                 printk(KERN_WARNING "%s: server returned incorrect attribute length: %u %c %u\n",
2570                                 __FUNCTION__,
2571                                 attrwords << 2,
2572                                 (attrwords < nwords) ? '<' : '>',
2573                                 nwords << 2);
2574                 return -EIO;
2575         }
2576         return 0;
2577 }
2578
2579 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2580 {
2581         uint32_t *p;
2582
2583         READ_BUF(20);
2584         READ32(cinfo->atomic);
2585         READ64(cinfo->before);
2586         READ64(cinfo->after);
2587         return 0;
2588 }
2589
2590 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
2591 {
2592         uint32_t *p;
2593         uint32_t supp, acc;
2594         int status;
2595
2596         status = decode_op_hdr(xdr, OP_ACCESS);
2597         if (status)
2598                 return status;
2599         READ_BUF(8);
2600         READ32(supp);
2601         READ32(acc);
2602         access->supported = supp;
2603         access->access = acc;
2604         return 0;
2605 }
2606
2607 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
2608 {
2609         uint32_t *p;
2610         int status;
2611
2612         status = decode_op_hdr(xdr, OP_CLOSE);
2613         if (status)
2614                 return status;
2615         READ_BUF(sizeof(res->stateid.data));
2616         COPYMEM(res->stateid.data, sizeof(res->stateid.data));
2617         return 0;
2618 }
2619
2620 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
2621 {
2622         uint32_t *p;
2623         int status;
2624
2625         status = decode_op_hdr(xdr, OP_COMMIT);
2626         if (status)
2627                 return status;
2628         READ_BUF(8);
2629         COPYMEM(res->verf->verifier, 8);
2630         return 0;
2631 }
2632
2633 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2634 {
2635         uint32_t *p;
2636         uint32_t bmlen;
2637         int status;
2638
2639         status = decode_op_hdr(xdr, OP_CREATE);
2640         if (status)
2641                 return status;
2642         if ((status = decode_change_info(xdr, cinfo)))
2643                 return status;
2644         READ_BUF(4);
2645         READ32(bmlen);
2646         READ_BUF(bmlen << 2);
2647         return 0;
2648 }
2649
2650 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
2651 {
2652         uint32_t *savep;
2653         uint32_t attrlen,
2654                  bitmap[2] = {0};
2655         int status;
2656
2657         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2658                 goto xdr_error;
2659         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2660                 goto xdr_error;
2661         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2662                 goto xdr_error;
2663         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
2664                 goto xdr_error;
2665         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
2666                 goto xdr_error;
2667         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
2668                 goto xdr_error;
2669         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
2670                 goto xdr_error;
2671         status = verify_attr_len(xdr, savep, attrlen);
2672 xdr_error:
2673         if (status != 0)
2674                 printk(KERN_NOTICE "%s: xdr error %d!\n", __FUNCTION__, -status);
2675         return status;
2676 }
2677
2678 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
2679 {
2680         uint32_t *savep;
2681         uint32_t attrlen,
2682                  bitmap[2] = {0};
2683         int status;
2684
2685         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2686                 goto xdr_error;
2687         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2688                 goto xdr_error;
2689         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2690                 goto xdr_error;
2691
2692         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
2693                 goto xdr_error;
2694         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
2695                 goto xdr_error;
2696         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
2697                 goto xdr_error;
2698         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
2699                 goto xdr_error;
2700         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
2701                 goto xdr_error;
2702         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
2703                 goto xdr_error;
2704
2705         status = verify_attr_len(xdr, savep, attrlen);
2706 xdr_error:
2707         if (status != 0)
2708                 printk(KERN_NOTICE "%s: xdr error %d!\n", __FUNCTION__, -status);
2709         return status;
2710 }
2711
2712 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
2713 {
2714         uint32_t *savep;
2715         uint32_t attrlen,
2716                  bitmap[2] = {0};
2717         int status;
2718
2719         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2720                 goto xdr_error;
2721         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2722                 goto xdr_error;
2723         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2724                 goto xdr_error;
2725
2726         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
2727                 goto xdr_error;
2728         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
2729                 goto xdr_error;
2730
2731         status = verify_attr_len(xdr, savep, attrlen);
2732 xdr_error:
2733         if (status != 0)
2734                 printk(KERN_NOTICE "%s: xdr error %d!\n", __FUNCTION__, -status);
2735         return status;
2736 }
2737
2738 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr, const struct nfs_server *server)
2739 {
2740         uint32_t *savep;
2741         uint32_t attrlen,
2742                  bitmap[2] = {0},
2743                  type;
2744         int status, fmode = 0;
2745
2746         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2747                 goto xdr_error;
2748         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2749                 goto xdr_error;
2750
2751         fattr->bitmap[0] = bitmap[0];
2752         fattr->bitmap[1] = bitmap[1];
2753
2754         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2755                 goto xdr_error;
2756
2757
2758         if ((status = decode_attr_type(xdr, bitmap, &type)) != 0)
2759                 goto xdr_error;
2760         fattr->type = nfs_type2fmt[type].nfs2type;
2761         fmode = nfs_type2fmt[type].mode;
2762
2763         if ((status = decode_attr_change(xdr, bitmap, &fattr->change_attr)) != 0)
2764                 goto xdr_error;
2765         if ((status = decode_attr_size(xdr, bitmap, &fattr->size)) != 0)
2766                 goto xdr_error;
2767         if ((status = decode_attr_fsid(xdr, bitmap, &fattr->fsid_u.nfs4)) != 0)
2768                 goto xdr_error;
2769         if ((status = decode_attr_fileid(xdr, bitmap, &fattr->fileid)) != 0)
2770                 goto xdr_error;
2771         if ((status = decode_attr_mode(xdr, bitmap, &fattr->mode)) != 0)
2772                 goto xdr_error;
2773         fattr->mode |= fmode;
2774         if ((status = decode_attr_nlink(xdr, bitmap, &fattr->nlink)) != 0)
2775                 goto xdr_error;
2776         if ((status = decode_attr_owner(xdr, bitmap, server->nfs4_state, &fattr->uid)) != 0)
2777                 goto xdr_error;
2778         if ((status = decode_attr_group(xdr, bitmap, server->nfs4_state, &fattr->gid)) != 0)
2779                 goto xdr_error;
2780         if ((status = decode_attr_rdev(xdr, bitmap, &fattr->rdev)) != 0)
2781                 goto xdr_error;
2782         if ((status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used)) != 0)
2783                 goto xdr_error;
2784         if ((status = decode_attr_time_access(xdr, bitmap, &fattr->atime)) != 0)
2785                 goto xdr_error;
2786         if ((status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime)) != 0)
2787                 goto xdr_error;
2788         if ((status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime)) != 0)
2789                 goto xdr_error;
2790         if ((status = verify_attr_len(xdr, savep, attrlen)) == 0) {
2791                 fattr->valid = NFS_ATTR_FATTR | NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4;
2792                 fattr->timestamp = jiffies;
2793         }
2794 xdr_error:
2795         if (status != 0)
2796                 printk(KERN_NOTICE "%s: xdr error %d!\n", __FUNCTION__, -status);
2797         return status;
2798 }
2799
2800
2801 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
2802 {
2803         uint32_t *savep;
2804         uint32_t attrlen, bitmap[2];
2805         int status;
2806
2807         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2808                 goto xdr_error;
2809         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2810                 goto xdr_error;
2811         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2812                 goto xdr_error;
2813
2814         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
2815
2816         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
2817                 goto xdr_error;
2818         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
2819                 goto xdr_error;
2820         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
2821                 goto xdr_error;
2822         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
2823         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
2824                 goto xdr_error;
2825         fsinfo->wtpref = fsinfo->wtmax;
2826
2827         status = verify_attr_len(xdr, savep, attrlen);
2828 xdr_error:
2829         if (status != 0)
2830                 printk(KERN_NOTICE "%s: xdr error %d!\n", __FUNCTION__, -status);
2831         return status;
2832 }
2833
2834 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
2835 {
2836         uint32_t *p;
2837         uint32_t len;
2838         int status;
2839
2840         status = decode_op_hdr(xdr, OP_GETFH);
2841         if (status)
2842                 return status;
2843         /* Zero handle first to allow comparisons */
2844         memset(fh, 0, sizeof(*fh));
2845
2846         READ_BUF(4);
2847         READ32(len);
2848         if (len > NFS4_FHSIZE)
2849                 return -EIO;
2850         fh->size = len;
2851         READ_BUF(len);
2852         COPYMEM(fh->data, len);
2853         return 0;
2854 }
2855
2856 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2857 {
2858         int status;
2859
2860         status = decode_op_hdr(xdr, OP_LINK);
2861         if (status)
2862                 return status;
2863         return decode_change_info(xdr, cinfo);
2864 }
2865
2866 /*
2867  * We create the owner, so we know a proper owner.id length is 4.
2868  */
2869 static int decode_lock_denied (struct xdr_stream *xdr, struct nfs_lock_denied *denied)
2870 {
2871         uint32_t *p;
2872         uint32_t namelen;
2873
2874         READ_BUF(32);
2875         READ64(denied->offset);
2876         READ64(denied->length);
2877         READ32(denied->type);
2878         READ64(denied->owner.clientid);
2879         READ32(namelen);
2880         READ_BUF(namelen);
2881         if (namelen == 4)
2882                 READ32(denied->owner.id);
2883         return -NFS4ERR_DENIED;
2884 }
2885
2886 static int decode_lock(struct xdr_stream *xdr, struct nfs_lockres *res)
2887 {
2888         uint32_t *p;
2889         int status;
2890
2891         status = decode_op_hdr(xdr, OP_LOCK);
2892         if (status == 0) {
2893                 READ_BUF(sizeof(nfs4_stateid));
2894                 COPYMEM(&res->u.stateid, sizeof(res->u.stateid));
2895         } else if (status == -NFS4ERR_DENIED)
2896                 return decode_lock_denied(xdr, &res->u.denied);
2897         return status;
2898 }
2899
2900 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockres *res)
2901 {
2902         int status;
2903         status = decode_op_hdr(xdr, OP_LOCKT);
2904         if (status == -NFS4ERR_DENIED)
2905                 return decode_lock_denied(xdr, &res->u.denied);
2906         return status;
2907 }
2908
2909 static int decode_locku(struct xdr_stream *xdr, struct nfs_lockres *res)
2910 {
2911         uint32_t *p;
2912         int status;
2913
2914         status = decode_op_hdr(xdr, OP_LOCKU);
2915         if (status == 0) {
2916                 READ_BUF(sizeof(nfs4_stateid));
2917                 COPYMEM(&res->u.stateid, sizeof(res->u.stateid));
2918         }
2919         return status;
2920 }
2921
2922 static int decode_lookup(struct xdr_stream *xdr)
2923 {
2924         return decode_op_hdr(xdr, OP_LOOKUP);
2925 }
2926
2927 /* This is too sick! */
2928 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
2929 {
2930         uint32_t *p;
2931         uint32_t limit_type, nblocks, blocksize;
2932
2933         READ_BUF(12);
2934         READ32(limit_type);
2935         switch (limit_type) {
2936                 case 1:
2937                         READ64(*maxsize);
2938                         break;
2939                 case 2:
2940                         READ32(nblocks);
2941                         READ32(blocksize);
2942                         *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
2943         }
2944         return 0;
2945 }
2946
2947 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
2948 {
2949         uint32_t *p;
2950         uint32_t delegation_type;
2951
2952         READ_BUF(4);
2953         READ32(delegation_type);
2954         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
2955                 res->delegation_type = 0;
2956                 return 0;
2957         }
2958         READ_BUF(20);
2959         COPYMEM(res->delegation.data, sizeof(res->delegation.data));
2960         READ32(res->do_recall);
2961         switch (delegation_type) {
2962                 case NFS4_OPEN_DELEGATE_READ:
2963                         res->delegation_type = FMODE_READ;
2964                         break;
2965                 case NFS4_OPEN_DELEGATE_WRITE:
2966                         res->delegation_type = FMODE_WRITE|FMODE_READ;
2967                         if (decode_space_limit(xdr, &res->maxsize) < 0)
2968                                 return -EIO;
2969         }
2970         return decode_ace(xdr, NULL, res->server->nfs4_state);
2971 }
2972
2973 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
2974 {
2975         uint32_t *p;
2976         uint32_t bmlen;
2977         int status;
2978
2979         status = decode_op_hdr(xdr, OP_OPEN);
2980         if (status)
2981                 return status;
2982         READ_BUF(sizeof(res->stateid.data));
2983         COPYMEM(res->stateid.data, sizeof(res->stateid.data));
2984
2985         decode_change_info(xdr, &res->cinfo);
2986
2987         READ_BUF(8);
2988         READ32(res->rflags);
2989         READ32(bmlen);
2990         if (bmlen > 10)
2991                 goto xdr_error;
2992
2993         READ_BUF(bmlen << 2);
2994         p += bmlen;
2995         return decode_delegation(xdr, res);
2996 xdr_error:
2997         printk(KERN_NOTICE "%s: xdr error!\n", __FUNCTION__);
2998         return -EIO;
2999 }
3000
3001 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
3002 {
3003         uint32_t *p;
3004         int status;
3005
3006         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
3007         if (status)
3008                 return status;
3009         READ_BUF(sizeof(res->stateid.data));
3010         COPYMEM(res->stateid.data, sizeof(res->stateid.data));
3011         return 0;
3012 }
3013
3014 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
3015 {
3016         uint32_t *p;
3017         int status;
3018
3019         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
3020         if (status)
3021                 return status;
3022         READ_BUF(sizeof(res->stateid.data));
3023         COPYMEM(res->stateid.data, sizeof(res->stateid.data));
3024         return 0;
3025 }
3026
3027 static int decode_putfh(struct xdr_stream *xdr)
3028 {
3029         return decode_op_hdr(xdr, OP_PUTFH);
3030 }
3031
3032 static int decode_putrootfh(struct xdr_stream *xdr)
3033 {
3034         return decode_op_hdr(xdr, OP_PUTROOTFH);
3035 }
3036
3037 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
3038 {
3039         struct kvec *iov = req->rq_rcv_buf.head;
3040         uint32_t *p;
3041         uint32_t count, eof, recvd, hdrlen;
3042         int status;
3043
3044         status = decode_op_hdr(xdr, OP_READ);
3045         if (status)
3046                 return status;
3047         READ_BUF(8);
3048         READ32(eof);
3049         READ32(count);
3050         hdrlen = (u8 *) p - (u8 *) iov->iov_base;
3051         recvd = req->rq_rcv_buf.len - hdrlen;
3052         if (count > recvd) {
3053                 printk(KERN_WARNING "NFS: server cheating in read reply: "
3054                                 "count %u > recvd %u\n", count, recvd);
3055                 count = recvd;
3056                 eof = 0;
3057         }
3058         xdr_read_pages(xdr, count);
3059         res->eof = eof;
3060         res->count = count;
3061         return 0;
3062 }
3063
3064 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
3065 {
3066         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
3067         struct page     *page = *rcvbuf->pages;
3068         struct kvec     *iov = rcvbuf->head;
3069         unsigned int    nr, pglen = rcvbuf->page_len;
3070         uint32_t        *end, *entry, *p, *kaddr;
3071         uint32_t        len, attrlen;
3072         int             hdrlen, recvd, status;
3073
3074         status = decode_op_hdr(xdr, OP_READDIR);
3075         if (status)
3076                 return status;
3077         READ_BUF(8);
3078         COPYMEM(readdir->verifier.data, 8);
3079         dprintk("%s: verifier = 0x%x%x\n",
3080                         __FUNCTION__,
3081                         ((u32 *)readdir->verifier.data)[0],
3082                         ((u32 *)readdir->verifier.data)[1]);
3083
3084
3085         hdrlen = (char *) p - (char *) iov->iov_base;
3086         recvd = rcvbuf->len - hdrlen;
3087         if (pglen > recvd)
3088                 pglen = recvd;
3089         xdr_read_pages(xdr, pglen);
3090
3091         BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
3092         kaddr = p = (uint32_t *) kmap_atomic(page, KM_USER0);
3093         end = (uint32_t *) ((char *)p + pglen + readdir->pgbase);
3094         entry = p;
3095         for (nr = 0; *p++; nr++) {
3096                 if (p + 3 > end)
3097                         goto short_pkt;
3098                 dprintk("cookie = %Lu, ", *((unsigned long long *)p));
3099                 p += 2;                 /* cookie */
3100                 len = ntohl(*p++);      /* filename length */
3101                 if (len > NFS4_MAXNAMLEN) {
3102                         printk(KERN_WARNING "NFS: giant filename in readdir (len 0x%x)\n", len);
3103                         goto err_unmap;
3104                 }
3105                 dprintk("filename = %*s\n", len, (char *)p);
3106                 p += XDR_QUADLEN(len);
3107                 if (p + 1 > end)
3108                         goto short_pkt;
3109                 len = ntohl(*p++);      /* bitmap length */
3110                 p += len;
3111                 if (p + 1 > end)
3112                         goto short_pkt;
3113                 attrlen = XDR_QUADLEN(ntohl(*p++));
3114                 p += attrlen;           /* attributes */
3115                 if (p + 2 > end)
3116                         goto short_pkt;
3117                 entry = p;
3118         }
3119         if (!nr && (entry[0] != 0 || entry[1] == 0))
3120                 goto short_pkt;
3121 out:
3122         kunmap_atomic(kaddr, KM_USER0);
3123         return 0;
3124 short_pkt:
3125         dprintk("%s: short packet at entry %d\n", __FUNCTION__, nr);
3126         entry[0] = entry[1] = 0;
3127         /* truncate listing ? */
3128         if (!nr) {
3129                 printk(KERN_NOTICE "NFS: readdir reply truncated!\n");
3130                 entry[1] = 1;
3131         }
3132         goto out;
3133 err_unmap:
3134         kunmap_atomic(kaddr, KM_USER0);
3135         return -errno_NFSERR_IO;
3136 }
3137
3138 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
3139 {
3140         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
3141         struct kvec *iov = rcvbuf->head;
3142         int hdrlen, len, recvd;
3143         uint32_t *p;
3144         char *kaddr;
3145         int status;
3146
3147         status = decode_op_hdr(xdr, OP_READLINK);
3148         if (status)
3149                 return status;
3150
3151         /* Convert length of symlink */
3152         READ_BUF(4);
3153         READ32(len);
3154         if (len >= rcvbuf->page_len || len <= 0) {
3155                 dprintk(KERN_WARNING "nfs: server returned giant symlink!\n");
3156                 return -ENAMETOOLONG;
3157         }
3158         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
3159         recvd = req->rq_rcv_buf.len - hdrlen;
3160         if (recvd < len) {
3161                 printk(KERN_WARNING "NFS: server cheating in readlink reply: "
3162                                 "count %u > recvd %u\n", len, recvd);
3163                 return -EIO;
3164         }
3165         xdr_read_pages(xdr, len);
3166         /*
3167          * The XDR encode routine has set things up so that
3168          * the link text will be copied directly into the
3169          * buffer.  We just have to do overflow-checking,
3170          * and and null-terminate the text (the VFS expects
3171          * null-termination).
3172          */
3173         kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
3174         kaddr[len+rcvbuf->page_base] = '\0';
3175         kunmap_atomic(kaddr, KM_USER0);
3176         return 0;
3177 }
3178
3179 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3180 {
3181         int status;
3182
3183         status = decode_op_hdr(xdr, OP_REMOVE);
3184         if (status)
3185                 goto out;
3186         status = decode_change_info(xdr, cinfo);
3187 out:
3188         return status;
3189 }
3190
3191 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
3192               struct nfs4_change_info *new_cinfo)
3193 {
3194         int status;
3195
3196         status = decode_op_hdr(xdr, OP_RENAME);
3197         if (status)
3198                 goto out;
3199         if ((status = decode_change_info(xdr, old_cinfo)))
3200                 goto out;
3201         status = decode_change_info(xdr, new_cinfo);
3202 out:
3203         return status;
3204 }
3205
3206 static int decode_renew(struct xdr_stream *xdr)
3207 {
3208         return decode_op_hdr(xdr, OP_RENEW);
3209 }
3210
3211 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
3212                 size_t *acl_len)
3213 {
3214         uint32_t *savep;
3215         uint32_t attrlen,
3216                  bitmap[2] = {0};
3217         struct kvec *iov = req->rq_rcv_buf.head;
3218         int status;
3219
3220         *acl_len = 0;
3221         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3222                 goto out;
3223         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3224                 goto out;
3225         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3226                 goto out;
3227
3228         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
3229                 return -EIO;
3230         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
3231                 int hdrlen, recvd;
3232
3233                 /* We ignore &savep and don't do consistency checks on
3234                  * the attr length.  Let userspace figure it out.... */
3235                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
3236                 recvd = req->rq_rcv_buf.len - hdrlen;
3237                 if (attrlen > recvd) {
3238                         printk(KERN_WARNING "NFS: server cheating in getattr"
3239                                         " acl reply: attrlen %u > recvd %u\n",
3240                                         attrlen, recvd);
3241                         return -EINVAL;
3242                 }
3243                 if (attrlen <= *acl_len)
3244                         xdr_read_pages(xdr, attrlen);
3245                 *acl_len = attrlen;
3246         }
3247
3248 out:
3249         return status;
3250 }
3251
3252 static int
3253 decode_savefh(struct xdr_stream *xdr)
3254 {
3255         return decode_op_hdr(xdr, OP_SAVEFH);
3256 }
3257
3258 static int decode_setattr(struct xdr_stream *xdr, struct nfs_setattrres *res)
3259 {
3260         uint32_t *p;
3261         uint32_t bmlen;
3262         int status;
3263
3264
3265         status = decode_op_hdr(xdr, OP_SETATTR);
3266         if (status)
3267                 return status;
3268         READ_BUF(4);
3269         READ32(bmlen);
3270         READ_BUF(bmlen << 2);
3271         return 0;
3272 }
3273
3274 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_client *clp)
3275 {
3276         uint32_t *p;
3277         uint32_t opnum;
3278         int32_t nfserr;
3279
3280         READ_BUF(8);
3281         READ32(opnum);
3282         if (opnum != OP_SETCLIENTID) {
3283                 printk(KERN_NOTICE
3284                                 "nfs4_decode_setclientid: Server returned operation"
3285                                 " %d\n", opnum);
3286                 return -EIO;
3287         }
3288         READ32(nfserr);
3289         if (nfserr == NFS_OK) {
3290                 READ_BUF(8 + sizeof(clp->cl_confirm.data));
3291                 READ64(clp->cl_clientid);
3292                 COPYMEM(clp->cl_confirm.data, sizeof(clp->cl_confirm.data));
3293         } else if (nfserr == NFSERR_CLID_INUSE) {
3294                 uint32_t len;
3295
3296                 /* skip netid string */
3297                 READ_BUF(4);
3298                 READ32(len);
3299                 READ_BUF(len);
3300
3301                 /* skip uaddr string */
3302                 READ_BUF(4);
3303                 READ32(len);
3304                 READ_BUF(len);
3305                 return -NFSERR_CLID_INUSE;
3306         } else
3307                 return -nfs_stat_to_errno(nfserr);
3308
3309         return 0;
3310 }
3311
3312 static int decode_setclientid_confirm(struct xdr_stream *xdr)
3313 {
3314         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
3315 }
3316
3317 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
3318 {
3319         uint32_t *p;
3320         int status;
3321
3322         status = decode_op_hdr(xdr, OP_WRITE);
3323         if (status)
3324                 return status;
3325
3326         READ_BUF(16);
3327         READ32(res->count);
3328         READ32(res->verf->committed);
3329         COPYMEM(res->verf->verifier, 8);
3330         return 0;
3331 }
3332
3333 static int decode_delegreturn(struct xdr_stream *xdr)
3334 {
3335         return decode_op_hdr(xdr, OP_DELEGRETURN);
3336 }
3337
3338 /*
3339  * Decode OPEN_DOWNGRADE response
3340  */
3341 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_closeres *res)
3342 {
3343         struct xdr_stream xdr;
3344         struct compound_hdr hdr;
3345         int status;
3346
3347         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3348         status = decode_compound_hdr(&xdr, &hdr);
3349         if (status)
3350                 goto out;
3351         status = decode_putfh(&xdr);
3352         if (status)
3353                 goto out;
3354         status = decode_open_downgrade(&xdr, res);
3355 out:
3356         return status;
3357 }
3358
3359 /*
3360  * END OF "GENERIC" DECODE ROUTINES.
3361  */
3362
3363 /*
3364  * Decode ACCESS response
3365  */
3366 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_accessres *res)
3367 {
3368         struct xdr_stream xdr;
3369         struct compound_hdr hdr;
3370         int status;
3371
3372         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3373         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3374                 goto out;
3375         if ((status = decode_putfh(&xdr)) == 0)
3376                 status = decode_access(&xdr, res);
3377 out:
3378         return status;
3379 }
3380
3381 /*
3382  * Decode LOOKUP response
3383  */
3384 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_lookup_res *res)
3385 {
3386         struct xdr_stream xdr;
3387         struct compound_hdr hdr;
3388         int status;
3389
3390         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3391         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3392                 goto out;
3393         if ((status = decode_putfh(&xdr)) != 0)
3394                 goto out;
3395         if ((status = decode_lookup(&xdr)) != 0)
3396                 goto out;
3397         if ((status = decode_getfh(&xdr, res->fh)) != 0)
3398                 goto out;
3399         status = decode_getfattr(&xdr, res->fattr, res->server);
3400 out:
3401         return status;
3402 }
3403
3404 /*
3405  * Decode LOOKUP_ROOT response
3406  */
3407 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_lookup_res *res)
3408 {
3409         struct xdr_stream xdr;
3410         struct compound_hdr hdr;
3411         int status;
3412
3413         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3414         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3415                 goto out;
3416         if ((status = decode_putrootfh(&xdr)) != 0)
3417                 goto out;
3418         if ((status = decode_getfh(&xdr, res->fh)) == 0)
3419                 status = decode_getfattr(&xdr, res->fattr, res->server);
3420 out:
3421         return status;
3422 }
3423
3424 /*
3425  * Decode REMOVE response
3426  */
3427 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_change_info *cinfo)
3428 {
3429         struct xdr_stream xdr;
3430         struct compound_hdr hdr;
3431         int status;
3432
3433         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3434         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3435                 goto out;
3436         if ((status = decode_putfh(&xdr)) == 0)
3437                 status = decode_remove(&xdr, cinfo);
3438 out:
3439         return status;
3440 }
3441
3442 /*
3443  * Decode RENAME response
3444  */
3445 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_rename_res *res)
3446 {
3447         struct xdr_stream xdr;
3448         struct compound_hdr hdr;
3449         int status;
3450
3451         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3452         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3453                 goto out;
3454         if ((status = decode_putfh(&xdr)) != 0)
3455                 goto out;
3456         if ((status = decode_savefh(&xdr)) != 0)
3457                 goto out;
3458         if ((status = decode_putfh(&xdr)) != 0)
3459                 goto out;
3460         status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo);
3461 out:
3462         return status;
3463 }
3464
3465 /*
3466  * Decode LINK response
3467  */
3468 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_change_info *cinfo)
3469 {
3470         struct xdr_stream xdr;
3471         struct compound_hdr hdr;
3472         int status;
3473
3474         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3475         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3476                 goto out;
3477         if ((status = decode_putfh(&xdr)) != 0)
3478                 goto out;
3479         if ((status = decode_savefh(&xdr)) != 0)
3480                 goto out;
3481         if ((status = decode_putfh(&xdr)) != 0)
3482                 goto out;
3483         status = decode_link(&xdr, cinfo);
3484 out:
3485         return status;
3486 }
3487
3488 /*
3489  * Decode CREATE response
3490  */
3491 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_create_res *res)
3492 {
3493         struct xdr_stream xdr;
3494         struct compound_hdr hdr;
3495         int status;
3496
3497         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3498         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3499                 goto out;
3500         if ((status = decode_putfh(&xdr)) != 0)
3501                 goto out;
3502         if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
3503                 goto out;
3504         if ((status = decode_getfh(&xdr, res->fh)) != 0)
3505                 goto out;
3506         status = decode_getfattr(&xdr, res->fattr, res->server);
3507         if (status == NFS4ERR_DELAY)
3508                 status = 0;
3509 out:
3510         return status;
3511 }
3512
3513 /*
3514  * Decode SYMLINK response
3515  */
3516 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_create_res *res)
3517 {
3518         return nfs4_xdr_dec_create(rqstp, p, res);
3519 }
3520
3521 /*
3522  * Decode GETATTR response
3523  */
3524 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_getattr_res *res)
3525 {
3526         struct xdr_stream xdr;
3527         struct compound_hdr hdr;
3528         int status;
3529
3530         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3531         status = decode_compound_hdr(&xdr, &hdr);
3532         if (status)
3533                 goto out;
3534         status = decode_putfh(&xdr);
3535         if (status)
3536                 goto out;
3537         status = decode_getfattr(&xdr, res->fattr, res->server);
3538 out:
3539         return status;
3540
3541 }
3542
3543 /*
3544  * Encode an SETACL request
3545  */
3546 static int
3547 nfs4_xdr_enc_setacl(struct rpc_rqst *req, uint32_t *p, struct nfs_setaclargs *args)
3548 {
3549         struct xdr_stream xdr;
3550         struct compound_hdr hdr = {
3551                 .nops   = 2,
3552         };
3553         int status;
3554
3555         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
3556         encode_compound_hdr(&xdr, &hdr);
3557         status = encode_putfh(&xdr, args->fh);
3558         if (status)
3559                 goto out;
3560         status = encode_setacl(&xdr, args);
3561 out:
3562         return status;
3563 }
3564 /*
3565  * Decode SETACL response
3566  */
3567 static int
3568 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, uint32_t *p, void *res)
3569 {
3570         struct xdr_stream xdr;
3571         struct compound_hdr hdr;
3572         int status;
3573
3574         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3575         status = decode_compound_hdr(&xdr, &hdr);
3576         if (status)
3577                 goto out;
3578         status = decode_putfh(&xdr);
3579         if (status)
3580                 goto out;
3581         status = decode_setattr(&xdr, res);
3582 out:
3583         return status;
3584 }
3585
3586 /*
3587  * Decode GETACL response
3588  */
3589 static int
3590 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, uint32_t *p, size_t *acl_len)
3591 {
3592         struct xdr_stream xdr;
3593         struct compound_hdr hdr;
3594         int status;
3595
3596         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3597         status = decode_compound_hdr(&xdr, &hdr);
3598         if (status)
3599                 goto out;
3600         status = decode_putfh(&xdr);
3601         if (status)
3602                 goto out;
3603         status = decode_getacl(&xdr, rqstp, acl_len);
3604
3605 out:
3606         return status;
3607 }
3608
3609 /*
3610  * Decode CLOSE response
3611  */
3612 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_closeres *res)
3613 {
3614         struct xdr_stream xdr;
3615         struct compound_hdr hdr;
3616         int status;
3617
3618         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3619         status = decode_compound_hdr(&xdr, &hdr);
3620         if (status)
3621                 goto out;
3622         status = decode_putfh(&xdr);
3623         if (status)
3624                 goto out;
3625         status = decode_close(&xdr, res);
3626 out:
3627         return status;
3628 }
3629
3630 /*
3631  * Decode OPEN response
3632  */
3633 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_openres *res)
3634 {
3635         struct xdr_stream xdr;
3636         struct compound_hdr hdr;
3637         int status;
3638
3639         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3640         status = decode_compound_hdr(&xdr, &hdr);
3641         if (status)
3642                 goto out;
3643         status = decode_putfh(&xdr);
3644         if (status)
3645                 goto out;
3646         status = decode_open(&xdr, res);
3647         if (status)
3648                 goto out;
3649         status = decode_getfh(&xdr, &res->fh);
3650         if (status)
3651                 goto out;
3652         status = decode_getfattr(&xdr, res->f_attr, res->server);
3653         if (status == NFS4ERR_DELAY)
3654                 status = 0;
3655 out:
3656         return status;
3657 }
3658
3659 /*
3660  * Decode OPEN_CONFIRM response
3661  */
3662 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_open_confirmres *res)
3663 {
3664         struct xdr_stream xdr;
3665         struct compound_hdr hdr;
3666         int status;
3667
3668         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3669         status = decode_compound_hdr(&xdr, &hdr);
3670         if (status)
3671                 goto out;
3672         status = decode_putfh(&xdr);
3673         if (status)
3674                 goto out;
3675         status = decode_open_confirm(&xdr, res);
3676 out:
3677         return status;
3678 }
3679
3680 /*
3681  * Decode OPEN response
3682  */
3683 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_openres *res)
3684 {
3685         struct xdr_stream xdr;
3686         struct compound_hdr hdr;
3687         int status;
3688
3689         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3690         status = decode_compound_hdr(&xdr, &hdr);
3691         if (status)
3692                 goto out;
3693         status = decode_putfh(&xdr);
3694         if (status)
3695                 goto out;
3696         status = decode_open(&xdr, res);
3697 out:
3698         return status;
3699 }
3700
3701 /*
3702  * Decode SETATTR response
3703  */
3704 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_setattrres *res)
3705 {
3706         struct xdr_stream xdr;
3707         struct compound_hdr hdr;
3708         int status;
3709
3710         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3711         status = decode_compound_hdr(&xdr, &hdr);
3712         if (status)
3713                 goto out;
3714         status = decode_putfh(&xdr);
3715         if (status)
3716                 goto out;
3717         status = decode_setattr(&xdr, res);
3718         if (status)
3719                 goto out;
3720         status = decode_getfattr(&xdr, res->fattr, res->server);
3721         if (status == NFS4ERR_DELAY)
3722                 status = 0;
3723 out:
3724         return status;
3725 }
3726
3727 /*
3728  * Decode LOCK response
3729  */
3730 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_lockres *res)
3731 {
3732         struct xdr_stream xdr;
3733         struct compound_hdr hdr;
3734         int status;
3735
3736         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3737         status = decode_compound_hdr(&xdr, &hdr);
3738         if (status)
3739                 goto out;
3740         status = decode_putfh(&xdr);
3741         if (status)
3742                 goto out;
3743         status = decode_lock(&xdr, res);
3744 out:
3745         return status;
3746 }
3747
3748 /*
3749  * Decode LOCKT response
3750  */
3751 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_lockres *res)
3752 {
3753         struct xdr_stream xdr;
3754         struct compound_hdr hdr;
3755         int status;
3756
3757         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3758         status = decode_compound_hdr(&xdr, &hdr);
3759         if (status)
3760                 goto out;
3761         status = decode_putfh(&xdr);
3762         if (status)
3763                 goto out;
3764         status = decode_lockt(&xdr, res);
3765 out:
3766         return status;
3767 }
3768
3769 /*
3770  * Decode LOCKU response
3771  */
3772 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_lockres *res)
3773 {
3774         struct xdr_stream xdr;
3775         struct compound_hdr hdr;
3776         int status;
3777
3778         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3779         status = decode_compound_hdr(&xdr, &hdr);
3780         if (status)
3781                 goto out;
3782         status = decode_putfh(&xdr);
3783         if (status)
3784                 goto out;
3785         status = decode_locku(&xdr, res);
3786 out:
3787         return status;
3788 }
3789
3790 /*
3791  * Decode READLINK response
3792  */
3793 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, uint32_t *p, void *res)
3794 {
3795         struct xdr_stream xdr;
3796         struct compound_hdr hdr;
3797         int status;
3798
3799         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3800         status = decode_compound_hdr(&xdr, &hdr);
3801         if (status)
3802                 goto out;
3803         status = decode_putfh(&xdr);
3804         if (status)
3805                 goto out;
3806         status = decode_readlink(&xdr, rqstp);
3807 out:
3808         return status;
3809 }
3810
3811 /*
3812  * Decode READDIR response
3813  */
3814 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_readdir_res *res)
3815 {
3816         struct xdr_stream xdr;
3817         struct compound_hdr hdr;
3818         int status;
3819
3820         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3821         status = decode_compound_hdr(&xdr, &hdr);
3822         if (status)
3823                 goto out;
3824         status = decode_putfh(&xdr);
3825         if (status)
3826                 goto out;
3827         status = decode_readdir(&xdr, rqstp, res);
3828 out:
3829         return status;
3830 }
3831
3832 /*
3833  * Decode Read response
3834  */
3835 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_readres *res)
3836 {
3837         struct xdr_stream xdr;
3838         struct compound_hdr hdr;
3839         int status;
3840
3841         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3842         status = decode_compound_hdr(&xdr, &hdr);
3843         if (status)
3844                 goto out;
3845         status = decode_putfh(&xdr);
3846         if (status)
3847                 goto out;
3848         status = decode_read(&xdr, rqstp, res);
3849         if (!status)
3850                 status = res->count;
3851 out:
3852         return status;
3853 }
3854
3855 /*
3856  * Decode WRITE response
3857  */
3858 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_writeres *res)
3859 {
3860         struct xdr_stream xdr;
3861         struct compound_hdr hdr;
3862         int status;
3863
3864         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3865         status = decode_compound_hdr(&xdr, &hdr);
3866         if (status)
3867                 goto out;
3868         status = decode_putfh(&xdr);
3869         if (status)
3870                 goto out;
3871         status = decode_write(&xdr, res);
3872         if (!status)
3873                 status = res->count;
3874 out:
3875         return status;
3876 }
3877
3878 /*
3879  * Decode COMMIT response
3880  */
3881 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_writeres *res)
3882 {
3883         struct xdr_stream xdr;
3884         struct compound_hdr hdr;
3885         int status;
3886
3887         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3888         status = decode_compound_hdr(&xdr, &hdr);
3889         if (status)
3890                 goto out;
3891         status = decode_putfh(&xdr);
3892         if (status)
3893                 goto out;
3894         status = decode_commit(&xdr, res);
3895 out:
3896         return status;
3897 }
3898
3899 /*
3900  * FSINFO request
3901  */
3902 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, uint32_t *p, struct nfs_fsinfo *fsinfo)
3903 {
3904         struct xdr_stream xdr;
3905         struct compound_hdr hdr;
3906         int status;
3907
3908         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
3909         status = decode_compound_hdr(&xdr, &hdr);
3910         if (!status)
3911                 status = decode_putfh(&xdr);
3912         if (!status)
3913                 status = decode_fsinfo(&xdr, fsinfo);
3914         if (!status)
3915                 status = -nfs_stat_to_errno(hdr.status);
3916         return status;
3917 }
3918
3919 /*
3920  * PATHCONF request
3921  */
3922 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, uint32_t *p, struct nfs_pathconf *pathconf)
3923 {
3924         struct xdr_stream xdr;
3925         struct compound_hdr hdr;
3926         int status;
3927
3928         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
3929         status = decode_compound_hdr(&xdr, &hdr);
3930         if (!status)
3931                 status = decode_putfh(&xdr);
3932         if (!status)
3933                 status = decode_pathconf(&xdr, pathconf);
3934         return status;
3935 }
3936
3937 /*
3938  * STATFS request
3939  */
3940 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, uint32_t *p, struct nfs_fsstat *fsstat)
3941 {
3942         struct xdr_stream xdr;
3943         struct compound_hdr hdr;
3944         int status;
3945
3946         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
3947         status = decode_compound_hdr(&xdr, &hdr);
3948         if (!status)
3949                 status = decode_putfh(&xdr);
3950         if (!status)
3951                 status = decode_statfs(&xdr, fsstat);
3952         return status;
3953 }
3954
3955 /*
3956  * GETATTR_BITMAP request
3957  */
3958 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, uint32_t *p, struct nfs4_server_caps_res *res)
3959 {
3960         struct xdr_stream xdr;
3961         struct compound_hdr hdr;
3962         int status;
3963
3964         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
3965         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3966                 goto out;
3967         if ((status = decode_putfh(&xdr)) != 0)
3968                 goto out;
3969         status = decode_server_caps(&xdr, res);
3970 out:
3971         return status;
3972 }
3973
3974 /*
3975  * Decode RENEW response
3976  */
3977 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, uint32_t *p, void *dummy)
3978 {
3979         struct xdr_stream xdr;
3980         struct compound_hdr hdr;
3981         int status;
3982
3983         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3984         status = decode_compound_hdr(&xdr, &hdr);
3985         if (!status)
3986                 status = decode_renew(&xdr);
3987         return status;
3988 }
3989
3990 /*
3991  * a SETCLIENTID request
3992  */
3993 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, uint32_t *p,
3994                 struct nfs4_client *clp)
3995 {
3996         struct xdr_stream xdr;
3997         struct compound_hdr hdr;
3998         int status;
3999
4000         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4001         status = decode_compound_hdr(&xdr, &hdr);
4002         if (!status)
4003                 status = decode_setclientid(&xdr, clp);
4004         if (!status)
4005                 status = -nfs_stat_to_errno(hdr.status);
4006         return status;
4007 }
4008
4009 /*
4010  * a SETCLIENTID_CONFIRM request
4011  */
4012 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, uint32_t *p, struct nfs_fsinfo *fsinfo)
4013 {
4014         struct xdr_stream xdr;
4015         struct compound_hdr hdr;
4016         int status;
4017
4018         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4019         status = decode_compound_hdr(&xdr, &hdr);
4020         if (!status)
4021                 status = decode_setclientid_confirm(&xdr);
4022         if (!status)
4023                 status = decode_putrootfh(&xdr);
4024         if (!status)
4025                 status = decode_fsinfo(&xdr, fsinfo);
4026         if (!status)
4027                 status = -nfs_stat_to_errno(hdr.status);
4028         return status;
4029 }
4030
4031 /*
4032  * DELEGRETURN request
4033  */
4034 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, uint32_t *p, void *dummy)
4035 {
4036         struct xdr_stream xdr;
4037         struct compound_hdr hdr;
4038         int status;
4039
4040         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4041         status = decode_compound_hdr(&xdr, &hdr);
4042         if (status == 0) {
4043                 status = decode_putfh(&xdr);
4044                 if (status == 0)
4045                         status = decode_delegreturn(&xdr);
4046         }
4047         return status;
4048 }
4049
4050 uint32_t *nfs4_decode_dirent(uint32_t *p, struct nfs_entry *entry, int plus)
4051 {
4052         uint32_t bitmap[2] = {0};
4053         uint32_t len;
4054
4055         if (!*p++) {
4056                 if (!*p)
4057                         return ERR_PTR(-EAGAIN);
4058                 entry->eof = 1;
4059                 return ERR_PTR(-EBADCOOKIE);
4060         }
4061
4062         entry->prev_cookie = entry->cookie;
4063         p = xdr_decode_hyper(p, &entry->cookie);
4064         entry->len = ntohl(*p++);
4065         entry->name = (const char *) p;
4066         p += XDR_QUADLEN(entry->len);
4067
4068         /*
4069          * In case the server doesn't return an inode number,
4070          * we fake one here.  (We don't use inode number 0,
4071          * since glibc seems to choke on it...)
4072          */
4073         entry->ino = 1;
4074
4075         len = ntohl(*p++);              /* bitmap length */
4076         if (len-- > 0) {
4077                 bitmap[0] = ntohl(*p++);
4078                 if (len-- > 0) {
4079                         bitmap[1] = ntohl(*p++);
4080                         p += len;
4081                 }
4082         }
4083         len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */
4084         if (len > 0) {
4085                 if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) {
4086                         bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
4087                         /* Ignore the return value of rdattr_error for now */
4088                         p++;
4089                         len--;
4090                 }
4091                 if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
4092                         xdr_decode_hyper(p, &entry->ino);
4093                 else if (bitmap[0] == FATTR4_WORD0_FILEID)
4094                         xdr_decode_hyper(p, &entry->ino);
4095                 p += len;
4096         }
4097
4098         entry->eof = !p[0] && p[1];
4099         return p;
4100 }
4101
4102 /*
4103  * We need to translate between nfs status return values and
4104  * the local errno values which may not be the same.
4105  */
4106 static struct {
4107         int stat;
4108         int errno;
4109 } nfs_errtbl[] = {
4110         { NFS4_OK,              0               },
4111         { NFS4ERR_PERM,         EPERM           },
4112         { NFS4ERR_NOENT,        ENOENT          },
4113         { NFS4ERR_IO,           errno_NFSERR_IO },
4114         { NFS4ERR_NXIO,         ENXIO           },
4115         { NFS4ERR_ACCESS,       EACCES          },
4116         { NFS4ERR_EXIST,        EEXIST          },
4117         { NFS4ERR_XDEV,         EXDEV           },
4118         { NFS4ERR_NOTDIR,       ENOTDIR         },
4119         { NFS4ERR_ISDIR,        EISDIR          },
4120         { NFS4ERR_INVAL,        EINVAL          },
4121         { NFS4ERR_FBIG,         EFBIG           },
4122         { NFS4ERR_NOSPC,        ENOSPC          },
4123         { NFS4ERR_ROFS,         EROFS           },
4124         { NFS4ERR_MLINK,        EMLINK          },
4125         { NFS4ERR_NAMETOOLONG,  ENAMETOOLONG    },
4126         { NFS4ERR_NOTEMPTY,     ENOTEMPTY       },
4127         { NFS4ERR_DQUOT,        EDQUOT          },
4128         { NFS4ERR_STALE,        ESTALE          },
4129         { NFS4ERR_BADHANDLE,    EBADHANDLE      },
4130         { NFS4ERR_BADOWNER,     EINVAL          },
4131         { NFS4ERR_BADNAME,      EINVAL          },
4132         { NFS4ERR_BAD_COOKIE,   EBADCOOKIE      },
4133         { NFS4ERR_NOTSUPP,      ENOTSUPP        },
4134         { NFS4ERR_TOOSMALL,     ETOOSMALL       },
4135         { NFS4ERR_SERVERFAULT,  ESERVERFAULT    },
4136         { NFS4ERR_BADTYPE,      EBADTYPE        },
4137         { NFS4ERR_LOCKED,       EAGAIN          },
4138         { NFS4ERR_RESOURCE,     EREMOTEIO       },
4139         { NFS4ERR_SYMLINK,      ELOOP           },
4140         { NFS4ERR_OP_ILLEGAL,   EOPNOTSUPP      },
4141         { NFS4ERR_DEADLOCK,     EDEADLK         },
4142         { NFS4ERR_WRONGSEC,     EPERM           }, /* FIXME: this needs
4143                                                     * to be handled by a
4144                                                     * middle-layer.
4145                                                     */
4146         { -1,                   EIO             }
4147 };
4148
4149 /*
4150  * Convert an NFS error code to a local one.
4151  * This one is used jointly by NFSv2 and NFSv3.
4152  */
4153 static int
4154 nfs_stat_to_errno(int stat)
4155 {
4156         int i;
4157         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
4158                 if (nfs_errtbl[i].stat == stat)
4159                         return nfs_errtbl[i].errno;
4160         }
4161         if (stat <= 10000 || stat > 10100) {
4162                 /* The server is looney tunes. */
4163                 return ESERVERFAULT;
4164         }
4165         /* If we cannot translate the error, the recovery routines should
4166          * handle it.
4167          * Note: remaining NFSv4 error codes have values > 10000, so should
4168          * not conflict with native Linux error codes.
4169          */
4170         return stat;
4171 }
4172
4173 #ifndef MAX
4174 # define MAX(a, b)      (((a) > (b))? (a) : (b))
4175 #endif
4176
4177 #define PROC(proc, argtype, restype)                            \
4178 [NFSPROC4_CLNT_##proc] = {                                      \
4179         .p_proc   = NFSPROC4_COMPOUND,                          \
4180         .p_encode = (kxdrproc_t) nfs4_xdr_##argtype,            \
4181         .p_decode = (kxdrproc_t) nfs4_xdr_##restype,            \
4182         .p_bufsiz = MAX(NFS4_##argtype##_sz,NFS4_##restype##_sz) << 2,  \
4183     }
4184
4185 struct rpc_procinfo     nfs4_procedures[] = {
4186   PROC(READ,            enc_read,       dec_read),
4187   PROC(WRITE,           enc_write,      dec_write),
4188   PROC(COMMIT,          enc_commit,     dec_commit),
4189   PROC(OPEN,            enc_open,       dec_open),
4190   PROC(OPEN_CONFIRM,    enc_open_confirm,       dec_open_confirm),
4191   PROC(OPEN_NOATTR,     enc_open_noattr,        dec_open_noattr),
4192   PROC(OPEN_DOWNGRADE,  enc_open_downgrade,     dec_open_downgrade),
4193   PROC(CLOSE,           enc_close,      dec_close),
4194   PROC(SETATTR,         enc_setattr,    dec_setattr),
4195   PROC(FSINFO,          enc_fsinfo,     dec_fsinfo),
4196   PROC(RENEW,           enc_renew,      dec_renew),
4197   PROC(SETCLIENTID,     enc_setclientid,        dec_setclientid),
4198   PROC(SETCLIENTID_CONFIRM,     enc_setclientid_confirm,        dec_setclientid_confirm),
4199   PROC(LOCK,            enc_lock,       dec_lock),
4200   PROC(LOCKT,           enc_lockt,      dec_lockt),
4201   PROC(LOCKU,           enc_locku,      dec_locku),
4202   PROC(ACCESS,          enc_access,     dec_access),
4203   PROC(GETATTR,         enc_getattr,    dec_getattr),
4204   PROC(LOOKUP,          enc_lookup,     dec_lookup),
4205   PROC(LOOKUP_ROOT,     enc_lookup_root,        dec_lookup_root),
4206   PROC(REMOVE,          enc_remove,     dec_remove),
4207   PROC(RENAME,          enc_rename,     dec_rename),
4208   PROC(LINK,            enc_link,       dec_link),
4209   PROC(SYMLINK,         enc_symlink,    dec_symlink),
4210   PROC(CREATE,          enc_create,     dec_create),
4211   PROC(PATHCONF,        enc_pathconf,   dec_pathconf),
4212   PROC(STATFS,          enc_statfs,     dec_statfs),
4213   PROC(READLINK,        enc_readlink,   dec_readlink),
4214   PROC(READDIR,         enc_readdir,    dec_readdir),
4215   PROC(SERVER_CAPS,     enc_server_caps, dec_server_caps),
4216   PROC(DELEGRETURN,     enc_delegreturn, dec_delegreturn),
4217   PROC(GETACL,          enc_getacl,     dec_getacl),
4218   PROC(SETACL,          enc_setacl,     dec_setacl),
4219 };
4220
4221 struct rpc_version              nfs_version4 = {
4222         .number                 = 4,
4223         .nrprocs                = sizeof(nfs4_procedures)/sizeof(nfs4_procedures[0]),
4224         .procs                  = nfs4_procedures
4225 };
4226
4227 /*
4228  * Local variables:
4229  *  c-basic-offset: 8
4230  * End:
4231  */