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/errno.h>
  42 #include <linux/string.h>
  43 #include <linux/in.h>
  44 #include <linux/pagemap.h>
  45 #include <linux/proc_fs.h>
  46 #include <linux/kdev_t.h>
  47 #include <linux/sunrpc/clnt.h>
  48 #include <linux/sunrpc/msg_prot.h>
  49 #include <linux/sunrpc/gss_api.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 #include "internal.h"
  56 #include "pnfs.h"
  57
  58 #define NFSDBG_FACILITY         NFSDBG_XDR
  59
  60 /* Mapping from NFS error code to "errno" error code. */
  61 #define errno_NFSERR_IO         EIO
  62
  63 static int nfs4_stat_to_errno(int);
  64
  65 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
  66 #ifdef DEBUG
  67 #define NFS4_MAXTAGLEN          20
  68 #else
  69 #define NFS4_MAXTAGLEN          0
  70 #endif
  71
  72 /* lock,open owner id:
  73  * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT  >> 2)
  74  */
  75 #define open_owner_id_maxsz     (1 + 1 + 4)
  76 #define lock_owner_id_maxsz     (1 + 1 + 4)
  77 #define decode_lockowner_maxsz  (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  78 #define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  79 #define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  80 #define op_encode_hdr_maxsz     (1)
  81 #define op_decode_hdr_maxsz     (2)
  82 #define encode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  83 #define decode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  84 #define encode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  85 #define decode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  86 #define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
  87                                 (NFS4_FHSIZE >> 2))
  88 #define decode_putfh_maxsz      (op_decode_hdr_maxsz)
  89 #define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
  90 #define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
  91 #define encode_getfh_maxsz      (op_encode_hdr_maxsz)
  92 #define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
  93                                 ((3+NFS4_FHSIZE) >> 2))
  94 #define nfs4_fattr_bitmap_maxsz 3
  95 #define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
  96 #define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
  97 #define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
  98 #define nfs4_owner_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  99 #define nfs4_group_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 100 /* This is based on getfattr, which uses the most attributes: */
 101 #define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
 102                                 3 + 3 + 3 + nfs4_owner_maxsz + nfs4_group_maxsz))
 103 #define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
 104                                 nfs4_fattr_value_maxsz)
 105 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
 106 #define encode_attrs_maxsz      (nfs4_fattr_bitmap_maxsz + \
 107                                  1 + 2 + 1 + \
 108                                 nfs4_owner_maxsz + \
 109                                 nfs4_group_maxsz + \
 110                                 4 + 4)
 111 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
 112 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
 113 #define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
 114 #define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 115 #define encode_fsinfo_maxsz     (encode_getattr_maxsz)
 116 #define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + 15)
 117 #define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 118 #define decode_renew_maxsz      (op_decode_hdr_maxsz)
 119 #define encode_setclientid_maxsz \
 120                                 (op_encode_hdr_maxsz + \
 121                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 122                                 XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
 123                                 1 /* sc_prog */ + \
 124                                 XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 125                                 XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
 126                                 1) /* sc_cb_ident */
 127 #define decode_setclientid_maxsz \
 128                                 (op_decode_hdr_maxsz + \
 129                                 2 + \
 130                                 1024) /* large value for CLID_INUSE */
 131 #define encode_setclientid_confirm_maxsz \
 132                                 (op_encode_hdr_maxsz + \
 133                                 3 + (NFS4_VERIFIER_SIZE >> 2))
 134 #define decode_setclientid_confirm_maxsz \
 135                                 (op_decode_hdr_maxsz)
 136 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
 137 #define decode_lookup_maxsz     (op_decode_hdr_maxsz)
 138 #define encode_share_access_maxsz \
 139                                 (2)
 140 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
 141 #define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
 142 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
 143 #define encode_open_maxsz       (op_encode_hdr_maxsz + \
 144                                 2 + encode_share_access_maxsz + 2 + \
 145                                 open_owner_id_maxsz + \
 146                                 encode_opentype_maxsz + \
 147                                 encode_claim_null_maxsz)
 148 #define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
 149 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
 150                                 decode_ace_maxsz)
 151 #define decode_change_info_maxsz        (5)
 152 #define decode_open_maxsz       (op_decode_hdr_maxsz + \
 153                                 decode_stateid_maxsz + \
 154                                 decode_change_info_maxsz + 1 + \
 155                                 nfs4_fattr_bitmap_maxsz + \
 156                                 decode_delegation_maxsz)
 157 #define encode_open_confirm_maxsz \
 158                                 (op_encode_hdr_maxsz + \
 159                                  encode_stateid_maxsz + 1)
 160 #define decode_open_confirm_maxsz \
 161                                 (op_decode_hdr_maxsz + \
 162                                  decode_stateid_maxsz)
 163 #define encode_open_downgrade_maxsz \
 164                                 (op_encode_hdr_maxsz + \
 165                                  encode_stateid_maxsz + 1 + \
 166                                  encode_share_access_maxsz)
 167 #define decode_open_downgrade_maxsz \
 168                                 (op_decode_hdr_maxsz + \
 169                                  decode_stateid_maxsz)
 170 #define encode_close_maxsz      (op_encode_hdr_maxsz + \
 171                                  1 + encode_stateid_maxsz)
 172 #define decode_close_maxsz      (op_decode_hdr_maxsz + \
 173                                  decode_stateid_maxsz)
 174 #define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
 175                                  encode_stateid_maxsz + \
 176                                  encode_attrs_maxsz)
 177 #define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
 178                                  nfs4_fattr_bitmap_maxsz)
 179 #define encode_read_maxsz       (op_encode_hdr_maxsz + \
 180                                  encode_stateid_maxsz + 3)
 181 #define decode_read_maxsz       (op_decode_hdr_maxsz + 2)
 182 #define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
 183                                  2 + encode_verifier_maxsz + 5)
 184 #define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
 185                                  decode_verifier_maxsz)
 186 #define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 187 #define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1)
 188 #define encode_write_maxsz      (op_encode_hdr_maxsz + \
 189                                  encode_stateid_maxsz + 4)
 190 #define decode_write_maxsz      (op_decode_hdr_maxsz + \
 191                                  2 + decode_verifier_maxsz)
 192 #define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
 193 #define decode_commit_maxsz     (op_decode_hdr_maxsz + \
 194                                  decode_verifier_maxsz)
 195 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 196                                 nfs4_name_maxsz)
 197 #define decode_remove_maxsz     (op_decode_hdr_maxsz + \
 198                                  decode_change_info_maxsz)
 199 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 200                                 2 * nfs4_name_maxsz)
 201 #define decode_rename_maxsz     (op_decode_hdr_maxsz + \
 202                                  decode_change_info_maxsz + \
 203                                  decode_change_info_maxsz)
 204 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 205                                 nfs4_name_maxsz)
 206 #define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
 207 #define encode_lockowner_maxsz  (7)
 208 #define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 209                                  7 + \
 210                                  1 + encode_stateid_maxsz + 1 + \
 211                                  encode_lockowner_maxsz)
 212 #define decode_lock_denied_maxsz \
 213                                 (8 + decode_lockowner_maxsz)
 214 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 215                                  decode_lock_denied_maxsz)
 216 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 5 + \
 217                                 encode_lockowner_maxsz)
 218 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 219                                  decode_lock_denied_maxsz)
 220 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 221                                  encode_stateid_maxsz + \
 222                                  4)
 223 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 224                                  decode_stateid_maxsz)
 225 #define encode_release_lockowner_maxsz \
 226                                 (op_encode_hdr_maxsz + \
 227                                  encode_lockowner_maxsz)
 228 #define decode_release_lockowner_maxsz \
 229                                 (op_decode_hdr_maxsz)
 230 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 231 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 232 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 233                                 1 + nfs4_name_maxsz + \
 234                                 1 + \
 235                                 nfs4_fattr_maxsz)
 236 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 237 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 238                                 1 + 2 + nfs4_name_maxsz + \
 239                                 encode_attrs_maxsz)
 240 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
 241                                 decode_change_info_maxsz + \
 242                                 nfs4_fattr_bitmap_maxsz)
 243 #define encode_statfs_maxsz     (encode_getattr_maxsz)
 244 #define decode_statfs_maxsz     (decode_getattr_maxsz)
 245 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 246 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 247 #define encode_getacl_maxsz     (encode_getattr_maxsz)
 248 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 249                                  nfs4_fattr_bitmap_maxsz + 1)
 250 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 251                                  encode_stateid_maxsz + 3)
 252 #define decode_setacl_maxsz     (decode_setattr_maxsz)
 253 #define encode_fs_locations_maxsz \
 254                                 (encode_getattr_maxsz)
 255 #define decode_fs_locations_maxsz \
 256                                 (0)
 257 #define encode_secinfo_maxsz    (op_encode_hdr_maxsz + nfs4_name_maxsz)
 258 #define decode_secinfo_maxsz    (op_decode_hdr_maxsz + 4 + (NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)))
 259
 260 #if defined(CONFIG_NFS_V4_1)
 261 #define NFS4_MAX_MACHINE_NAME_LEN (64)
 262
 263 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
 264                                 encode_verifier_maxsz + \
 265                                 1 /* co_ownerid.len */ + \
 266                                 XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
 267                                 1 /* flags */ + \
 268                                 1 /* spa_how */ + \
 269                                 0 /* SP4_NONE (for now) */ + \
 270                                 1 /* zero implemetation id array */)
 271 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
 272                                 2 /* eir_clientid */ + \
 273                                 1 /* eir_sequenceid */ + \
 274                                 1 /* eir_flags */ + \
 275                                 1 /* spr_how */ + \
 276                                 0 /* SP4_NONE (for now) */ + \
 277                                 2 /* eir_server_owner.so_minor_id */ + \
 278                                 /* eir_server_owner.so_major_id<> */ \
 279                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 280                                 /* eir_server_scope<> */ \
 281                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 282                                 1 /* eir_server_impl_id array length */ + \
 283                                 0 /* ignored eir_server_impl_id contents */)
 284 #define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
 285 #define decode_channel_attrs_maxsz  (6 + \
 286                                      1 /* ca_rdma_ird.len */ + \
 287                                      1 /* ca_rdma_ird */)
 288 #define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
 289                                      2 /* csa_clientid */ + \
 290                                      1 /* csa_sequence */ + \
 291                                      1 /* csa_flags */ + \
 292                                      encode_channel_attrs_maxsz + \
 293                                      encode_channel_attrs_maxsz + \
 294                                      1 /* csa_cb_program */ + \
 295                                      1 /* csa_sec_parms.len (1) */ + \
 296                                      1 /* cb_secflavor (AUTH_SYS) */ + \
 297                                      1 /* stamp */ + \
 298                                      1 /* machinename.len */ + \
 299                                      XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
 300                                      1 /* uid */ + \
 301                                      1 /* gid */ + \
 302                                      1 /* gids.len (0) */)
 303 #define decode_create_session_maxsz  (op_decode_hdr_maxsz +     \
 304                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 305                                      1 /* csr_sequence */ + \
 306                                      1 /* csr_flags */ + \
 307                                      decode_channel_attrs_maxsz + \
 308                                      decode_channel_attrs_maxsz)
 309 #define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
 310 #define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
 311 #define encode_sequence_maxsz   (op_encode_hdr_maxsz + \
 312                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
 313 #define decode_sequence_maxsz   (op_decode_hdr_maxsz + \
 314                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
 315 #define encode_reclaim_complete_maxsz   (op_encode_hdr_maxsz + 4)
 316 #define decode_reclaim_complete_maxsz   (op_decode_hdr_maxsz + 4)
 317 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + 4 + \
 318                                 XDR_QUADLEN(NFS4_DEVICEID4_SIZE))
 319 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
 320                                 1 /* layout type */ + \
 321                                 1 /* opaque devaddr4 length */ + \
 322                                   /* devaddr4 payload is read into page */ \
 323                                 1 /* notification bitmap length */ + \
 324                                 1 /* notification bitmap */)
 325 #define encode_layoutget_maxsz  (op_encode_hdr_maxsz + 10 + \
 326                                 encode_stateid_maxsz)
 327 #define decode_layoutget_maxsz  (op_decode_hdr_maxsz + 8 + \
 328                                 decode_stateid_maxsz + \
 329                                 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
 330 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz +          \
 331                                 2 /* offset */ + \
 332                                 2 /* length */ + \
 333                                 1 /* reclaim */ + \
 334                                 encode_stateid_maxsz + \
 335                                 1 /* new offset (true) */ + \
 336                                 2 /* last byte written */ + \
 337                                 1 /* nt_timechanged (false) */ + \
 338                                 1 /* layoutupdate4 layout type */ + \
 339                                 1 /* NULL filelayout layoutupdate4 payload */)
 340 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
 341 #define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
 342                                 encode_stateid_maxsz + \
 343                                 1 /* FIXME: opaque lrf_body always empty at the moment */)
 344 #define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
 345                                 1 + decode_stateid_maxsz)
 346 #else /* CONFIG_NFS_V4_1 */
 347 #define encode_sequence_maxsz   0
 348 #define decode_sequence_maxsz   0
 349 #endif /* CONFIG_NFS_V4_1 */
 350
 351 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 352 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 353 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 354                                 encode_sequence_maxsz + \
 355                                 encode_putfh_maxsz + \
 356                                 encode_read_maxsz)
 357 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 358                                 decode_sequence_maxsz + \
 359                                 decode_putfh_maxsz + \
 360                                 decode_read_maxsz)
 361 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 362                                 encode_sequence_maxsz + \
 363                                 encode_putfh_maxsz + \
 364                                 encode_readlink_maxsz)
 365 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 366                                 decode_sequence_maxsz + \
 367                                 decode_putfh_maxsz + \
 368                                 decode_readlink_maxsz)
 369 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 370                                 encode_sequence_maxsz + \
 371                                 encode_putfh_maxsz + \
 372                                 encode_readdir_maxsz)
 373 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 374                                 decode_sequence_maxsz + \
 375                                 decode_putfh_maxsz + \
 376                                 decode_readdir_maxsz)
 377 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 378                                 encode_sequence_maxsz + \
 379                                 encode_putfh_maxsz + \
 380                                 encode_write_maxsz + \
 381                                 encode_getattr_maxsz)
 382 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 383                                 decode_sequence_maxsz + \
 384                                 decode_putfh_maxsz + \
 385                                 decode_write_maxsz + \
 386                                 decode_getattr_maxsz)
 387 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 388                                 encode_sequence_maxsz + \
 389                                 encode_putfh_maxsz + \
 390                                 encode_commit_maxsz + \
 391                                 encode_getattr_maxsz)
 392 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 393                                 decode_sequence_maxsz + \
 394                                 decode_putfh_maxsz + \
 395                                 decode_commit_maxsz + \
 396                                 decode_getattr_maxsz)
 397 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 398                                 encode_sequence_maxsz + \
 399                                 encode_putfh_maxsz + \
 400                                 encode_savefh_maxsz + \
 401                                 encode_open_maxsz + \
 402                                 encode_getfh_maxsz + \
 403                                 encode_getattr_maxsz + \
 404                                 encode_restorefh_maxsz + \
 405                                 encode_getattr_maxsz)
 406 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 407                                 decode_sequence_maxsz + \
 408                                 decode_putfh_maxsz + \
 409                                 decode_savefh_maxsz + \
 410                                 decode_open_maxsz + \
 411                                 decode_getfh_maxsz + \
 412                                 decode_getattr_maxsz + \
 413                                 decode_restorefh_maxsz + \
 414                                 decode_getattr_maxsz)
 415 #define NFS4_enc_open_confirm_sz \
 416                                 (compound_encode_hdr_maxsz + \
 417                                  encode_putfh_maxsz + \
 418                                  encode_open_confirm_maxsz)
 419 #define NFS4_dec_open_confirm_sz \
 420                                 (compound_decode_hdr_maxsz + \
 421                                  decode_putfh_maxsz + \
 422                                  decode_open_confirm_maxsz)
 423 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 424                                         encode_sequence_maxsz + \
 425                                         encode_putfh_maxsz + \
 426                                         encode_open_maxsz + \
 427                                         encode_getattr_maxsz)
 428 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 429                                         decode_sequence_maxsz + \
 430                                         decode_putfh_maxsz + \
 431                                         decode_open_maxsz + \
 432                                         decode_getattr_maxsz)
 433 #define NFS4_enc_open_downgrade_sz \
 434                                 (compound_encode_hdr_maxsz + \
 435                                  encode_sequence_maxsz + \
 436                                  encode_putfh_maxsz + \
 437                                  encode_open_downgrade_maxsz + \
 438                                  encode_getattr_maxsz)
 439 #define NFS4_dec_open_downgrade_sz \
 440                                 (compound_decode_hdr_maxsz + \
 441                                  decode_sequence_maxsz + \
 442                                  decode_putfh_maxsz + \
 443                                  decode_open_downgrade_maxsz + \
 444                                  decode_getattr_maxsz)
 445 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 446                                  encode_sequence_maxsz + \
 447                                  encode_putfh_maxsz + \
 448                                  encode_close_maxsz + \
 449                                  encode_getattr_maxsz)
 450 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 451                                  decode_sequence_maxsz + \
 452                                  decode_putfh_maxsz + \
 453                                  decode_close_maxsz + \
 454                                  decode_getattr_maxsz)
 455 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 456                                  encode_sequence_maxsz + \
 457                                  encode_putfh_maxsz + \
 458                                  encode_setattr_maxsz + \
 459                                  encode_getattr_maxsz)
 460 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 461                                  decode_sequence_maxsz + \
 462                                  decode_putfh_maxsz + \
 463                                  decode_setattr_maxsz + \
 464                                  decode_getattr_maxsz)
 465 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 466                                 encode_sequence_maxsz + \
 467                                 encode_putfh_maxsz + \
 468                                 encode_fsinfo_maxsz)
 469 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 470                                 decode_sequence_maxsz + \
 471                                 decode_putfh_maxsz + \
 472                                 decode_fsinfo_maxsz)
 473 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 474                                 encode_renew_maxsz)
 475 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 476                                 decode_renew_maxsz)
 477 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 478                                 encode_setclientid_maxsz)
 479 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 480                                 decode_setclientid_maxsz)
 481 #define NFS4_enc_setclientid_confirm_sz \
 482                                 (compound_encode_hdr_maxsz + \
 483                                 encode_setclientid_confirm_maxsz + \
 484                                 encode_putrootfh_maxsz + \
 485                                 encode_fsinfo_maxsz)
 486 #define NFS4_dec_setclientid_confirm_sz \
 487                                 (compound_decode_hdr_maxsz + \
 488                                 decode_setclientid_confirm_maxsz + \
 489                                 decode_putrootfh_maxsz + \
 490                                 decode_fsinfo_maxsz)
 491 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 492                                 encode_sequence_maxsz + \
 493                                 encode_putfh_maxsz + \
 494                                 encode_lock_maxsz)
 495 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 496                                 decode_sequence_maxsz + \
 497                                 decode_putfh_maxsz + \
 498                                 decode_lock_maxsz)
 499 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 500                                 encode_sequence_maxsz + \
 501                                 encode_putfh_maxsz + \
 502                                 encode_lockt_maxsz)
 503 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 504                                  decode_sequence_maxsz + \
 505                                  decode_putfh_maxsz + \
 506                                  decode_lockt_maxsz)
 507 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 508                                 encode_sequence_maxsz + \
 509                                 encode_putfh_maxsz + \
 510                                 encode_locku_maxsz)
 511 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 512                                 decode_sequence_maxsz + \
 513                                 decode_putfh_maxsz + \
 514                                 decode_locku_maxsz)
 515 #define NFS4_enc_release_lockowner_sz \
 516                                 (compound_encode_hdr_maxsz + \
 517                                  encode_lockowner_maxsz)
 518 #define NFS4_dec_release_lockowner_sz \
 519                                 (compound_decode_hdr_maxsz + \
 520                                  decode_lockowner_maxsz)
 521 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 522                                 encode_sequence_maxsz + \
 523                                 encode_putfh_maxsz + \
 524                                 encode_access_maxsz + \
 525                                 encode_getattr_maxsz)
 526 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 527                                 decode_sequence_maxsz + \
 528                                 decode_putfh_maxsz + \
 529                                 decode_access_maxsz + \
 530                                 decode_getattr_maxsz)
 531 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 532                                 encode_sequence_maxsz + \
 533                                 encode_putfh_maxsz + \
 534                                 encode_getattr_maxsz)
 535 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 536                                 decode_sequence_maxsz + \
 537                                 decode_putfh_maxsz + \
 538                                 decode_getattr_maxsz)
 539 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 540                                 encode_sequence_maxsz + \
 541                                 encode_putfh_maxsz + \
 542                                 encode_lookup_maxsz + \
 543                                 encode_getattr_maxsz + \
 544                                 encode_getfh_maxsz)
 545 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 546                                 decode_sequence_maxsz + \
 547                                 decode_putfh_maxsz + \
 548                                 decode_lookup_maxsz + \
 549                                 decode_getattr_maxsz + \
 550                                 decode_getfh_maxsz)
 551 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 552                                 encode_sequence_maxsz + \
 553                                 encode_putrootfh_maxsz + \
 554                                 encode_getattr_maxsz + \
 555                                 encode_getfh_maxsz)
 556 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 557                                 decode_sequence_maxsz + \
 558                                 decode_putrootfh_maxsz + \
 559                                 decode_getattr_maxsz + \
 560                                 decode_getfh_maxsz)
 561 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 562                                 encode_sequence_maxsz + \
 563                                 encode_putfh_maxsz + \
 564                                 encode_remove_maxsz + \
 565                                 encode_getattr_maxsz)
 566 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 567                                 decode_sequence_maxsz + \
 568                                 decode_putfh_maxsz + \
 569                                 decode_remove_maxsz + \
 570                                 decode_getattr_maxsz)
 571 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 572                                 encode_sequence_maxsz + \
 573                                 encode_putfh_maxsz + \
 574                                 encode_savefh_maxsz + \
 575                                 encode_putfh_maxsz + \
 576                                 encode_rename_maxsz + \
 577                                 encode_getattr_maxsz + \
 578                                 encode_restorefh_maxsz + \
 579                                 encode_getattr_maxsz)
 580 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 581                                 decode_sequence_maxsz + \
 582                                 decode_putfh_maxsz + \
 583                                 decode_savefh_maxsz + \
 584                                 decode_putfh_maxsz + \
 585                                 decode_rename_maxsz + \
 586                                 decode_getattr_maxsz + \
 587                                 decode_restorefh_maxsz + \
 588                                 decode_getattr_maxsz)
 589 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 590                                 encode_sequence_maxsz + \
 591                                 encode_putfh_maxsz + \
 592                                 encode_savefh_maxsz + \
 593                                 encode_putfh_maxsz + \
 594                                 encode_link_maxsz + \
 595                                 decode_getattr_maxsz + \
 596                                 encode_restorefh_maxsz + \
 597                                 decode_getattr_maxsz)
 598 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 599                                 decode_sequence_maxsz + \
 600                                 decode_putfh_maxsz + \
 601                                 decode_savefh_maxsz + \
 602                                 decode_putfh_maxsz + \
 603                                 decode_link_maxsz + \
 604                                 decode_getattr_maxsz + \
 605                                 decode_restorefh_maxsz + \
 606                                 decode_getattr_maxsz)
 607 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 608                                 encode_sequence_maxsz + \
 609                                 encode_putfh_maxsz + \
 610                                 encode_symlink_maxsz + \
 611                                 encode_getattr_maxsz + \
 612                                 encode_getfh_maxsz)
 613 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 614                                 decode_sequence_maxsz + \
 615                                 decode_putfh_maxsz + \
 616                                 decode_symlink_maxsz + \
 617                                 decode_getattr_maxsz + \
 618                                 decode_getfh_maxsz)
 619 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 620                                 encode_sequence_maxsz + \
 621                                 encode_putfh_maxsz + \
 622                                 encode_savefh_maxsz + \
 623                                 encode_create_maxsz + \
 624                                 encode_getfh_maxsz + \
 625                                 encode_getattr_maxsz + \
 626                                 encode_restorefh_maxsz + \
 627                                 encode_getattr_maxsz)
 628 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 629                                 decode_sequence_maxsz + \
 630                                 decode_putfh_maxsz + \
 631                                 decode_savefh_maxsz + \
 632                                 decode_create_maxsz + \
 633                                 decode_getfh_maxsz + \
 634                                 decode_getattr_maxsz + \
 635                                 decode_restorefh_maxsz + \
 636                                 decode_getattr_maxsz)
 637 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 638                                 encode_sequence_maxsz + \
 639                                 encode_putfh_maxsz + \
 640                                 encode_getattr_maxsz)
 641 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 642                                 decode_sequence_maxsz + \
 643                                 decode_putfh_maxsz + \
 644                                 decode_getattr_maxsz)
 645 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 646                                 encode_sequence_maxsz + \
 647                                 encode_putfh_maxsz + \
 648                                 encode_statfs_maxsz)
 649 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 650                                 decode_sequence_maxsz + \
 651                                 decode_putfh_maxsz + \
 652                                 decode_statfs_maxsz)
 653 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 654                                 encode_sequence_maxsz + \
 655                                 encode_putfh_maxsz + \
 656                                 encode_getattr_maxsz)
 657 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 658                                 decode_sequence_maxsz + \
 659                                 decode_putfh_maxsz + \
 660                                 decode_getattr_maxsz)
 661 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 662                                 encode_sequence_maxsz + \
 663                                 encode_putfh_maxsz + \
 664                                 encode_delegreturn_maxsz + \
 665                                 encode_getattr_maxsz)
 666 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 667                                 decode_sequence_maxsz + \
 668                                 decode_delegreturn_maxsz + \
 669                                 decode_getattr_maxsz)
 670 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 671                                 encode_sequence_maxsz + \
 672                                 encode_putfh_maxsz + \
 673                                 encode_getacl_maxsz)
 674 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 675                                 decode_sequence_maxsz + \
 676                                 decode_putfh_maxsz + \
 677                                 decode_getacl_maxsz)
 678 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 679                                 encode_sequence_maxsz + \
 680                                 encode_putfh_maxsz + \
 681                                 encode_setacl_maxsz)
 682 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 683                                 decode_sequence_maxsz + \
 684                                 decode_putfh_maxsz + \
 685                                 decode_setacl_maxsz)
 686 #define NFS4_enc_fs_locations_sz \
 687                                 (compound_encode_hdr_maxsz + \
 688                                  encode_sequence_maxsz + \
 689                                  encode_putfh_maxsz + \
 690                                  encode_lookup_maxsz + \
 691                                  encode_fs_locations_maxsz)
 692 #define NFS4_dec_fs_locations_sz \
 693                                 (compound_decode_hdr_maxsz + \
 694                                  decode_sequence_maxsz + \
 695                                  decode_putfh_maxsz + \
 696                                  decode_lookup_maxsz + \
 697                                  decode_fs_locations_maxsz)
 698 #define NFS4_enc_secinfo_sz     (compound_encode_hdr_maxsz + \
 699                                 encode_sequence_maxsz + \
 700                                 encode_putfh_maxsz + \
 701                                 encode_secinfo_maxsz)
 702 #define NFS4_dec_secinfo_sz     (compound_decode_hdr_maxsz + \
 703                                 decode_sequence_maxsz + \
 704                                 decode_putfh_maxsz + \
 705                                 decode_secinfo_maxsz)
 706 #if defined(CONFIG_NFS_V4_1)
 707 #define NFS4_enc_exchange_id_sz \
 708                                 (compound_encode_hdr_maxsz + \
 709                                  encode_exchange_id_maxsz)
 710 #define NFS4_dec_exchange_id_sz \
 711                                 (compound_decode_hdr_maxsz + \
 712                                  decode_exchange_id_maxsz)
 713 #define NFS4_enc_create_session_sz \
 714                                 (compound_encode_hdr_maxsz + \
 715                                  encode_create_session_maxsz)
 716 #define NFS4_dec_create_session_sz \
 717                                 (compound_decode_hdr_maxsz + \
 718                                  decode_create_session_maxsz)
 719 #define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
 720                                          encode_destroy_session_maxsz)
 721 #define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
 722                                          decode_destroy_session_maxsz)
 723 #define NFS4_enc_sequence_sz \
 724                                 (compound_decode_hdr_maxsz + \
 725                                  encode_sequence_maxsz)
 726 #define NFS4_dec_sequence_sz \
 727                                 (compound_decode_hdr_maxsz + \
 728                                  decode_sequence_maxsz)
 729 #define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
 730                                          encode_sequence_maxsz + \
 731                                          encode_putrootfh_maxsz + \
 732                                          encode_fsinfo_maxsz)
 733 #define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
 734                                          decode_sequence_maxsz + \
 735                                          decode_putrootfh_maxsz + \
 736                                          decode_fsinfo_maxsz)
 737 #define NFS4_enc_reclaim_complete_sz    (compound_encode_hdr_maxsz + \
 738                                          encode_sequence_maxsz + \
 739                                          encode_reclaim_complete_maxsz)
 740 #define NFS4_dec_reclaim_complete_sz    (compound_decode_hdr_maxsz + \
 741                                          decode_sequence_maxsz + \
 742                                          decode_reclaim_complete_maxsz)
 743 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
 744                                 encode_sequence_maxsz +\
 745                                 encode_getdeviceinfo_maxsz)
 746 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
 747                                 decode_sequence_maxsz + \
 748                                 decode_getdeviceinfo_maxsz)
 749 #define NFS4_enc_layoutget_sz   (compound_encode_hdr_maxsz + \
 750                                 encode_sequence_maxsz + \
 751                                 encode_putfh_maxsz +        \
 752                                 encode_layoutget_maxsz)
 753 #define NFS4_dec_layoutget_sz   (compound_decode_hdr_maxsz + \
 754                                 decode_sequence_maxsz + \
 755                                 decode_putfh_maxsz +        \
 756                                 decode_layoutget_maxsz)
 757 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
 758                                 encode_sequence_maxsz +\
 759                                 encode_putfh_maxsz + \
 760                                 encode_layoutcommit_maxsz + \
 761                                 encode_getattr_maxsz)
 762 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
 763                                 decode_sequence_maxsz + \
 764                                 decode_putfh_maxsz + \
 765                                 decode_layoutcommit_maxsz + \
 766                                 decode_getattr_maxsz)
 767 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
 768                                 encode_sequence_maxsz + \
 769                                 encode_putfh_maxsz + \
 770                                 encode_layoutreturn_maxsz)
 771 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
 772                                 decode_sequence_maxsz + \
 773                                 decode_putfh_maxsz + \
 774                                 decode_layoutreturn_maxsz)
 775
 776 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 777                                       compound_encode_hdr_maxsz +
 778                                       encode_sequence_maxsz +
 779                                       encode_putfh_maxsz +
 780                                       encode_getattr_maxsz) *
 781                                      XDR_UNIT);
 782
 783 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 784                                      compound_decode_hdr_maxsz +
 785                                      decode_sequence_maxsz +
 786                                      decode_putfh_maxsz) *
 787                                     XDR_UNIT);
 788 #endif /* CONFIG_NFS_V4_1 */
 789
 790 static const umode_t nfs_type2fmt[] = {
 791         [NF4BAD] = 0,
 792         [NF4REG] = S_IFREG,
 793         [NF4DIR] = S_IFDIR,
 794         [NF4BLK] = S_IFBLK,
 795         [NF4CHR] = S_IFCHR,
 796         [NF4LNK] = S_IFLNK,
 797         [NF4SOCK] = S_IFSOCK,
 798         [NF4FIFO] = S_IFIFO,
 799         [NF4ATTRDIR] = 0,
 800         [NF4NAMEDATTR] = 0,
 801 };
 802
 803 struct compound_hdr {
 804         int32_t         status;
 805         uint32_t        nops;
 806         __be32 *        nops_p;
 807         uint32_t        taglen;
 808         char *          tag;
 809         uint32_t        replen;         /* expected reply words */
 810         u32             minorversion;
 811 };
 812
 813 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
 814 {
 815         __be32 *p = xdr_reserve_space(xdr, nbytes);
 816         BUG_ON(!p);
 817         return p;
 818 }
 819
 820 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 821 {
 822         __be32 *p;
 823
 824         p = xdr_reserve_space(xdr, 4 + len);
 825         BUG_ON(p == NULL);
 826         xdr_encode_opaque(p, str, len);
 827 }
 828
 829 static void encode_compound_hdr(struct xdr_stream *xdr,
 830                                 struct rpc_rqst *req,
 831                                 struct compound_hdr *hdr)
 832 {
 833         __be32 *p;
 834         struct rpc_auth *auth = req->rq_cred->cr_auth;
 835
 836         /* initialize running count of expected bytes in reply.
 837          * NOTE: the replied tag SHOULD be the same is the one sent,
 838          * but this is not required as a MUST for the server to do so. */
 839         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
 840
 841         dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
 842         BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
 843         p = reserve_space(xdr, 4 + hdr->taglen + 8);
 844         p = xdr_encode_opaque(p, hdr->tag, hdr->taglen);
 845         *p++ = cpu_to_be32(hdr->minorversion);
 846         hdr->nops_p = p;
 847         *p = cpu_to_be32(hdr->nops);
 848 }
 849
 850 static void encode_nops(struct compound_hdr *hdr)
 851 {
 852         BUG_ON(hdr->nops > NFS4_MAX_OPS);
 853         *hdr->nops_p = htonl(hdr->nops);
 854 }
 855
 856 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 857 {
 858         __be32 *p;
 859
 860         p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
 861         BUG_ON(p == NULL);
 862         xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
 863 }
 864
 865 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
 866 {
 867         char owner_name[IDMAP_NAMESZ];
 868         char owner_group[IDMAP_NAMESZ];
 869         int owner_namelen = 0;
 870         int owner_grouplen = 0;
 871         __be32 *p;
 872         __be32 *q;
 873         int len;
 874         uint32_t bmval0 = 0;
 875         uint32_t bmval1 = 0;
 876
 877         /*
 878          * We reserve enough space to write the entire attribute buffer at once.
 879          * In the worst-case, this would be
 880          *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
 881          *          = 36 bytes, plus any contribution from variable-length fields
 882          *            such as owner/group.
 883          */
 884         len = 16;
 885
 886         /* Sigh */
 887         if (iap->ia_valid & ATTR_SIZE)
 888                 len += 8;
 889         if (iap->ia_valid & ATTR_MODE)
 890                 len += 4;
 891         if (iap->ia_valid & ATTR_UID) {
 892                 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
 893                 if (owner_namelen < 0) {
 894                         dprintk("nfs: couldn't resolve uid %d to string\n",
 895                                         iap->ia_uid);
 896                         /* XXX */
 897                         strcpy(owner_name, "nobody");
 898                         owner_namelen = sizeof("nobody") - 1;
 899                         /* goto out; */
 900                 }
 901                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
 902         }
 903         if (iap->ia_valid & ATTR_GID) {
 904                 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
 905                 if (owner_grouplen < 0) {
 906                         dprintk("nfs: couldn't resolve gid %d to string\n",
 907                                         iap->ia_gid);
 908                         strcpy(owner_group, "nobody");
 909                         owner_grouplen = sizeof("nobody") - 1;
 910                         /* goto out; */
 911                 }
 912                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
 913         }
 914         if (iap->ia_valid & ATTR_ATIME_SET)
 915                 len += 16;
 916         else if (iap->ia_valid & ATTR_ATIME)
 917                 len += 4;
 918         if (iap->ia_valid & ATTR_MTIME_SET)
 919                 len += 16;
 920         else if (iap->ia_valid & ATTR_MTIME)
 921                 len += 4;
 922         p = reserve_space(xdr, len);
 923
 924         /*
 925          * We write the bitmap length now, but leave the bitmap and the attribute
 926          * buffer length to be backfilled at the end of this routine.
 927          */
 928         *p++ = cpu_to_be32(2);
 929         q = p;
 930         p += 3;
 931
 932         if (iap->ia_valid & ATTR_SIZE) {
 933                 bmval0 |= FATTR4_WORD0_SIZE;
 934                 p = xdr_encode_hyper(p, iap->ia_size);
 935         }
 936         if (iap->ia_valid & ATTR_MODE) {
 937                 bmval1 |= FATTR4_WORD1_MODE;
 938                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
 939         }
 940         if (iap->ia_valid & ATTR_UID) {
 941                 bmval1 |= FATTR4_WORD1_OWNER;
 942                 p = xdr_encode_opaque(p, owner_name, owner_namelen);
 943         }
 944         if (iap->ia_valid & ATTR_GID) {
 945                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
 946                 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
 947         }
 948         if (iap->ia_valid & ATTR_ATIME_SET) {
 949                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 950                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
 951                 *p++ = cpu_to_be32(0);
 952                 *p++ = cpu_to_be32(iap->ia_atime.tv_sec);
 953                 *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
 954         }
 955         else if (iap->ia_valid & ATTR_ATIME) {
 956                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 957                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
 958         }
 959         if (iap->ia_valid & ATTR_MTIME_SET) {
 960                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 961                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
 962                 *p++ = cpu_to_be32(0);
 963                 *p++ = cpu_to_be32(iap->ia_mtime.tv_sec);
 964                 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
 965         }
 966         else if (iap->ia_valid & ATTR_MTIME) {
 967                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 968                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
 969         }
 970
 971         /*
 972          * Now we backfill the bitmap and the attribute buffer length.
 973          */
 974         if (len != ((char *)p - (char *)q) + 4) {
 975                 printk(KERN_ERR "nfs: Attr length error, %u != %Zu\n",
 976                                 len, ((char *)p - (char *)q) + 4);
 977                 BUG();
 978         }
 979         len = (char *)p - (char *)q - 12;
 980         *q++ = htonl(bmval0);
 981         *q++ = htonl(bmval1);
 982         *q = htonl(len);
 983
 984 /* out: */
 985 }
 986
 987 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
 988 {
 989         __be32 *p;
 990
 991         p = reserve_space(xdr, 8);
 992         *p++ = cpu_to_be32(OP_ACCESS);
 993         *p = cpu_to_be32(access);
 994         hdr->nops++;
 995         hdr->replen += decode_access_maxsz;
 996 }
 997
 998 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
 999 {
1000         __be32 *p;
1001
1002         p = reserve_space(xdr, 8+NFS4_STATEID_SIZE);
1003         *p++ = cpu_to_be32(OP_CLOSE);
1004         *p++ = cpu_to_be32(arg->seqid->sequence->counter);
1005         xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1006         hdr->nops++;
1007         hdr->replen += decode_close_maxsz;
1008 }
1009
1010 static void encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1011 {
1012         __be32 *p;
1013
1014         p = reserve_space(xdr, 16);
1015         *p++ = cpu_to_be32(OP_COMMIT);
1016         p = xdr_encode_hyper(p, args->offset);
1017         *p = cpu_to_be32(args->count);
1018         hdr->nops++;
1019         hdr->replen += decode_commit_maxsz;
1020 }
1021
1022 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1023 {
1024         __be32 *p;
1025
1026         p = reserve_space(xdr, 8);
1027         *p++ = cpu_to_be32(OP_CREATE);
1028         *p = cpu_to_be32(create->ftype);
1029
1030         switch (create->ftype) {
1031         case NF4LNK:
1032                 p = reserve_space(xdr, 4);
1033                 *p = cpu_to_be32(create->u.symlink.len);
1034                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
1035                 break;
1036
1037         case NF4BLK: case NF4CHR:
1038                 p = reserve_space(xdr, 8);
1039                 *p++ = cpu_to_be32(create->u.device.specdata1);
1040                 *p = cpu_to_be32(create->u.device.specdata2);
1041                 break;
1042
1043         default:
1044                 break;
1045         }
1046
1047         encode_string(xdr, create->name->len, create->name->name);
1048         hdr->nops++;
1049         hdr->replen += decode_create_maxsz;
1050
1051         encode_attrs(xdr, create->attrs, create->server);
1052 }
1053
1054 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1055 {
1056         __be32 *p;
1057
1058         p = reserve_space(xdr, 12);
1059         *p++ = cpu_to_be32(OP_GETATTR);
1060         *p++ = cpu_to_be32(1);
1061         *p = cpu_to_be32(bitmap);
1062         hdr->nops++;
1063         hdr->replen += decode_getattr_maxsz;
1064 }
1065
1066 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1067 {
1068         __be32 *p;
1069
1070         p = reserve_space(xdr, 16);
1071         *p++ = cpu_to_be32(OP_GETATTR);
1072         *p++ = cpu_to_be32(2);
1073         *p++ = cpu_to_be32(bm0);
1074         *p = cpu_to_be32(bm1);
1075         hdr->nops++;
1076         hdr->replen += decode_getattr_maxsz;
1077 }
1078
1079 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1080 {
1081         encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1082                            bitmask[1] & nfs4_fattr_bitmap[1], hdr);
1083 }
1084
1085 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1086 {
1087         encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
1088                            bitmask[1] & nfs4_fsinfo_bitmap[1], hdr);
1089 }
1090
1091 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1092 {
1093         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1094                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1095 }
1096
1097 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1098 {
1099         __be32 *p;
1100
1101         p = reserve_space(xdr, 4);
1102         *p = cpu_to_be32(OP_GETFH);
1103         hdr->nops++;
1104         hdr->replen += decode_getfh_maxsz;
1105 }
1106
1107 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1108 {
1109         __be32 *p;
1110
1111         p = reserve_space(xdr, 8 + name->len);
1112         *p++ = cpu_to_be32(OP_LINK);
1113         xdr_encode_opaque(p, name->name, name->len);
1114         hdr->nops++;
1115         hdr->replen += decode_link_maxsz;
1116 }
1117
1118 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1119 {
1120         if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
1121                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1122         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1123 }
1124
1125 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1126 {
1127         if (fl->fl_end == OFFSET_MAX)
1128                 return ~(uint64_t)0;
1129         return fl->fl_end - fl->fl_start + 1;
1130 }
1131
1132 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1133 {
1134         __be32 *p;
1135
1136         p = reserve_space(xdr, 32);
1137         p = xdr_encode_hyper(p, lowner->clientid);
1138         *p++ = cpu_to_be32(20);
1139         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1140         *p++ = cpu_to_be32(lowner->s_dev);
1141         xdr_encode_hyper(p, lowner->id);
1142 }
1143
1144 /*
1145  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1146  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1147  */
1148 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1149 {
1150         __be32 *p;
1151
1152         p = reserve_space(xdr, 32);
1153         *p++ = cpu_to_be32(OP_LOCK);
1154         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1155         *p++ = cpu_to_be32(args->reclaim);
1156         p = xdr_encode_hyper(p, args->fl->fl_start);
1157         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1158         *p = cpu_to_be32(args->new_lock_owner);
1159         if (args->new_lock_owner){
1160                 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1161                 *p++ = cpu_to_be32(args->open_seqid->sequence->counter);
1162                 p = xdr_encode_opaque_fixed(p, args->open_stateid->data, NFS4_STATEID_SIZE);
1163                 *p++ = cpu_to_be32(args->lock_seqid->sequence->counter);
1164                 encode_lockowner(xdr, &args->lock_owner);
1165         }
1166         else {
1167                 p = reserve_space(xdr, NFS4_STATEID_SIZE+4);
1168                 p = xdr_encode_opaque_fixed(p, args->lock_stateid->data, NFS4_STATEID_SIZE);
1169                 *p = cpu_to_be32(args->lock_seqid->sequence->counter);
1170         }
1171         hdr->nops++;
1172         hdr->replen += decode_lock_maxsz;
1173 }
1174
1175 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1176 {
1177         __be32 *p;
1178
1179         p = reserve_space(xdr, 24);
1180         *p++ = cpu_to_be32(OP_LOCKT);
1181         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1182         p = xdr_encode_hyper(p, args->fl->fl_start);
1183         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1184         encode_lockowner(xdr, &args->lock_owner);
1185         hdr->nops++;
1186         hdr->replen += decode_lockt_maxsz;
1187 }
1188
1189 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1190 {
1191         __be32 *p;
1192
1193         p = reserve_space(xdr, 12+NFS4_STATEID_SIZE+16);
1194         *p++ = cpu_to_be32(OP_LOCKU);
1195         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1196         *p++ = cpu_to_be32(args->seqid->sequence->counter);
1197         p = xdr_encode_opaque_fixed(p, args->stateid->data, NFS4_STATEID_SIZE);
1198         p = xdr_encode_hyper(p, args->fl->fl_start);
1199         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1200         hdr->nops++;
1201         hdr->replen += decode_locku_maxsz;
1202 }
1203
1204 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1205 {
1206         __be32 *p;
1207
1208         p = reserve_space(xdr, 4);
1209         *p = cpu_to_be32(OP_RELEASE_LOCKOWNER);
1210         encode_lockowner(xdr, lowner);
1211         hdr->nops++;
1212         hdr->replen += decode_release_lockowner_maxsz;
1213 }
1214
1215 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1216 {
1217         int len = name->len;
1218         __be32 *p;
1219
1220         p = reserve_space(xdr, 8 + len);
1221         *p++ = cpu_to_be32(OP_LOOKUP);
1222         xdr_encode_opaque(p, name->name, len);
1223         hdr->nops++;
1224         hdr->replen += decode_lookup_maxsz;
1225 }
1226
1227 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1228 {
1229         __be32 *p;
1230
1231         p = reserve_space(xdr, 8);
1232         switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1233         case FMODE_READ:
1234                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1235                 break;
1236         case FMODE_WRITE:
1237                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1238                 break;
1239         case FMODE_READ|FMODE_WRITE:
1240                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1241                 break;
1242         default:
1243                 *p++ = cpu_to_be32(0);
1244         }
1245         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1246 }
1247
1248 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1249 {
1250         __be32 *p;
1251  /*
1252  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1253  * owner 4 = 32
1254  */
1255         p = reserve_space(xdr, 8);
1256         *p++ = cpu_to_be32(OP_OPEN);
1257         *p = cpu_to_be32(arg->seqid->sequence->counter);
1258         encode_share_access(xdr, arg->fmode);
1259         p = reserve_space(xdr, 32);
1260         p = xdr_encode_hyper(p, arg->clientid);
1261         *p++ = cpu_to_be32(20);
1262         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1263         *p++ = cpu_to_be32(arg->server->s_dev);
1264         xdr_encode_hyper(p, arg->id);
1265 }
1266
1267 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1268 {
1269         __be32 *p;
1270         struct nfs_client *clp;
1271
1272         p = reserve_space(xdr, 4);
1273         switch(arg->open_flags & O_EXCL) {
1274         case 0:
1275                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1276                 encode_attrs(xdr, arg->u.attrs, arg->server);
1277                 break;
1278         default:
1279                 clp = arg->server->nfs_client;
1280                 if (clp->cl_mvops->minor_version > 0) {
1281                         if (nfs4_has_persistent_session(clp)) {
1282                                 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1283                                 encode_attrs(xdr, arg->u.attrs, arg->server);
1284                         } else {
1285                                 struct iattr dummy;
1286
1287                                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1288                                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1289                                 dummy.ia_valid = 0;
1290                                 encode_attrs(xdr, &dummy, arg->server);
1291                         }
1292                 } else {
1293                         *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1294                         encode_nfs4_verifier(xdr, &arg->u.verifier);
1295                 }
1296         }
1297 }
1298
1299 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1300 {
1301         __be32 *p;
1302
1303         p = reserve_space(xdr, 4);
1304         switch (arg->open_flags & O_CREAT) {
1305         case 0:
1306                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1307                 break;
1308         default:
1309                 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1310                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1311                 encode_createmode(xdr, arg);
1312         }
1313 }
1314
1315 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1316 {
1317         __be32 *p;
1318
1319         p = reserve_space(xdr, 4);
1320         switch (delegation_type) {
1321         case 0:
1322                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1323                 break;
1324         case FMODE_READ:
1325                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1326                 break;
1327         case FMODE_WRITE|FMODE_READ:
1328                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1329                 break;
1330         default:
1331                 BUG();
1332         }
1333 }
1334
1335 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1336 {
1337         __be32 *p;
1338
1339         p = reserve_space(xdr, 4);
1340         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1341         encode_string(xdr, name->len, name->name);
1342 }
1343
1344 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1345 {
1346         __be32 *p;
1347
1348         p = reserve_space(xdr, 4);
1349         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1350         encode_delegation_type(xdr, type);
1351 }
1352
1353 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1354 {
1355         __be32 *p;
1356
1357         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1358         *p++ = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1359         xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1360         encode_string(xdr, name->len, name->name);
1361 }
1362
1363 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1364 {
1365         encode_openhdr(xdr, arg);
1366         encode_opentype(xdr, arg);
1367         switch (arg->claim) {
1368         case NFS4_OPEN_CLAIM_NULL:
1369                 encode_claim_null(xdr, arg->name);
1370                 break;
1371         case NFS4_OPEN_CLAIM_PREVIOUS:
1372                 encode_claim_previous(xdr, arg->u.delegation_type);
1373                 break;
1374         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1375                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1376                 break;
1377         default:
1378                 BUG();
1379         }
1380         hdr->nops++;
1381         hdr->replen += decode_open_maxsz;
1382 }
1383
1384 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1385 {
1386         __be32 *p;
1387
1388         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1389         *p++ = cpu_to_be32(OP_OPEN_CONFIRM);
1390         p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1391         *p = cpu_to_be32(arg->seqid->sequence->counter);
1392         hdr->nops++;
1393         hdr->replen += decode_open_confirm_maxsz;
1394 }
1395
1396 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1397 {
1398         __be32 *p;
1399
1400         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1401         *p++ = cpu_to_be32(OP_OPEN_DOWNGRADE);
1402         p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1403         *p = cpu_to_be32(arg->seqid->sequence->counter);
1404         encode_share_access(xdr, arg->fmode);
1405         hdr->nops++;
1406         hdr->replen += decode_open_downgrade_maxsz;
1407 }
1408
1409 static void
1410 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1411 {
1412         int len = fh->size;
1413         __be32 *p;
1414
1415         p = reserve_space(xdr, 8 + len);
1416         *p++ = cpu_to_be32(OP_PUTFH);
1417         xdr_encode_opaque(p, fh->data, len);
1418         hdr->nops++;
1419         hdr->replen += decode_putfh_maxsz;
1420 }
1421
1422 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1423 {
1424         __be32 *p;
1425
1426         p = reserve_space(xdr, 4);
1427         *p = cpu_to_be32(OP_PUTROOTFH);
1428         hdr->nops++;
1429         hdr->replen += decode_putrootfh_maxsz;
1430 }
1431
1432 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx, const struct nfs_lock_context *l_ctx, int zero_seqid)
1433 {
1434         nfs4_stateid stateid;
1435         __be32 *p;
1436
1437         p = reserve_space(xdr, NFS4_STATEID_SIZE);
1438         if (ctx->state != NULL) {
1439                 nfs4_copy_stateid(&stateid, ctx->state, l_ctx->lockowner, l_ctx->pid);
1440                 if (zero_seqid)
1441                         stateid.stateid.seqid = 0;
1442                 xdr_encode_opaque_fixed(p, stateid.data, NFS4_STATEID_SIZE);
1443         } else
1444                 xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1445 }
1446
1447 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1448 {
1449         __be32 *p;
1450
1451         p = reserve_space(xdr, 4);
1452         *p = cpu_to_be32(OP_READ);
1453
1454         encode_stateid(xdr, args->context, args->lock_context,
1455                        hdr->minorversion);
1456
1457         p = reserve_space(xdr, 12);
1458         p = xdr_encode_hyper(p, args->offset);
1459         *p = cpu_to_be32(args->count);
1460         hdr->nops++;
1461         hdr->replen += decode_read_maxsz;
1462 }
1463
1464 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1465 {
1466         uint32_t attrs[2] = {
1467                 FATTR4_WORD0_RDATTR_ERROR,
1468                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1469         };
1470         uint32_t dircount = readdir->count >> 1;
1471         __be32 *p;
1472
1473         if (readdir->plus) {
1474                 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1475                         FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1476                 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1477                         FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1478                         FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1479                         FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1480                 dircount >>= 1;
1481         }
1482         /* Use mounted_on_fileid only if the server supports it */
1483         if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1484                 attrs[0] |= FATTR4_WORD0_FILEID;
1485
1486         p = reserve_space(xdr, 12+NFS4_VERIFIER_SIZE+20);
1487         *p++ = cpu_to_be32(OP_READDIR);
1488         p = xdr_encode_hyper(p, readdir->cookie);
1489         p = xdr_encode_opaque_fixed(p, readdir->verifier.data, NFS4_VERIFIER_SIZE);
1490         *p++ = cpu_to_be32(dircount);
1491         *p++ = cpu_to_be32(readdir->count);
1492         *p++ = cpu_to_be32(2);
1493
1494         *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1495         *p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1496         hdr->nops++;
1497         hdr->replen += decode_readdir_maxsz;
1498         dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1499                         __func__,
1500                         (unsigned long long)readdir->cookie,
1501                         ((u32 *)readdir->verifier.data)[0],
1502                         ((u32 *)readdir->verifier.data)[1],
1503                         attrs[0] & readdir->bitmask[0],
1504                         attrs[1] & readdir->bitmask[1]);
1505 }
1506
1507 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1508 {
1509         __be32 *p;
1510
1511         p = reserve_space(xdr, 4);
1512         *p = cpu_to_be32(OP_READLINK);
1513         hdr->nops++;
1514         hdr->replen += decode_readlink_maxsz;
1515 }
1516
1517 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1518 {
1519         __be32 *p;
1520
1521         p = reserve_space(xdr, 8 + name->len);
1522         *p++ = cpu_to_be32(OP_REMOVE);
1523         xdr_encode_opaque(p, name->name, name->len);
1524         hdr->nops++;
1525         hdr->replen += decode_remove_maxsz;
1526 }
1527
1528 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1529 {
1530         __be32 *p;
1531
1532         p = reserve_space(xdr, 4);
1533         *p = cpu_to_be32(OP_RENAME);
1534         encode_string(xdr, oldname->len, oldname->name);
1535         encode_string(xdr, newname->len, newname->name);
1536         hdr->nops++;
1537         hdr->replen += decode_rename_maxsz;
1538 }
1539
1540 static void encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid, struct compound_hdr *hdr)
1541 {
1542         __be32 *p;
1543
1544         p = reserve_space(xdr, 12);
1545         *p++ = cpu_to_be32(OP_RENEW);
1546         xdr_encode_hyper(p, client_stateid->cl_clientid);
1547         hdr->nops++;
1548         hdr->replen += decode_renew_maxsz;
1549 }
1550
1551 static void
1552 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1553 {
1554         __be32 *p;
1555
1556         p = reserve_space(xdr, 4);
1557         *p = cpu_to_be32(OP_RESTOREFH);
1558         hdr->nops++;
1559         hdr->replen += decode_restorefh_maxsz;
1560 }
1561
1562 static void
1563 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1564 {
1565         __be32 *p;
1566
1567         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1568         *p++ = cpu_to_be32(OP_SETATTR);
1569         xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1570         p = reserve_space(xdr, 2*4);
1571         *p++ = cpu_to_be32(1);
1572         *p = cpu_to_be32(FATTR4_WORD0_ACL);
1573         BUG_ON(arg->acl_len % 4);
1574         p = reserve_space(xdr, 4);
1575         *p = cpu_to_be32(arg->acl_len);
1576         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1577         hdr->nops++;
1578         hdr->replen += decode_setacl_maxsz;
1579 }
1580
1581 static void
1582 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1583 {
1584         __be32 *p;
1585
1586         p = reserve_space(xdr, 4);
1587         *p = cpu_to_be32(OP_SAVEFH);
1588         hdr->nops++;
1589         hdr->replen += decode_savefh_maxsz;
1590 }
1591
1592 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1593 {
1594         __be32 *p;
1595
1596         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1597         *p++ = cpu_to_be32(OP_SETATTR);
1598         xdr_encode_opaque_fixed(p, arg->stateid.data, NFS4_STATEID_SIZE);
1599         hdr->nops++;
1600         hdr->replen += decode_setattr_maxsz;
1601         encode_attrs(xdr, arg->iap, server);
1602 }
1603
1604 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1605 {
1606         __be32 *p;
1607
1608         p = reserve_space(xdr, 4 + NFS4_VERIFIER_SIZE);
1609         *p++ = cpu_to_be32(OP_SETCLIENTID);
1610         xdr_encode_opaque_fixed(p, setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
1611
1612         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1613         p = reserve_space(xdr, 4);
1614         *p = cpu_to_be32(setclientid->sc_prog);
1615         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1616         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1617         p = reserve_space(xdr, 4);
1618         *p = cpu_to_be32(setclientid->sc_cb_ident);
1619         hdr->nops++;
1620         hdr->replen += decode_setclientid_maxsz;
1621 }
1622
1623 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1624 {
1625         __be32 *p;
1626
1627         p = reserve_space(xdr, 12 + NFS4_VERIFIER_SIZE);
1628         *p++ = cpu_to_be32(OP_SETCLIENTID_CONFIRM);
1629         p = xdr_encode_hyper(p, arg->clientid);
1630         xdr_encode_opaque_fixed(p, arg->confirm.data, NFS4_VERIFIER_SIZE);
1631         hdr->nops++;
1632         hdr->replen += decode_setclientid_confirm_maxsz;
1633 }
1634
1635 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1636 {
1637         __be32 *p;
1638
1639         p = reserve_space(xdr, 4);
1640         *p = cpu_to_be32(OP_WRITE);
1641
1642         encode_stateid(xdr, args->context, args->lock_context,
1643                        hdr->minorversion);
1644
1645         p = reserve_space(xdr, 16);
1646         p = xdr_encode_hyper(p, args->offset);
1647         *p++ = cpu_to_be32(args->stable);
1648         *p = cpu_to_be32(args->count);
1649
1650         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1651         hdr->nops++;
1652         hdr->replen += decode_write_maxsz;
1653 }
1654
1655 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1656 {
1657         __be32 *p;
1658
1659         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1660
1661         *p++ = cpu_to_be32(OP_DELEGRETURN);
1662         xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1663         hdr->nops++;
1664         hdr->replen += decode_delegreturn_maxsz;
1665 }
1666
1667 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1668 {
1669         int len = name->len;
1670         __be32 *p;
1671
1672         p = reserve_space(xdr, 8 + len);
1673         *p++ = cpu_to_be32(OP_SECINFO);
1674         xdr_encode_opaque(p, name->name, len);
1675         hdr->nops++;
1676         hdr->replen += decode_secinfo_maxsz;
1677 }
1678
1679 #if defined(CONFIG_NFS_V4_1)
1680 /* NFSv4.1 operations */
1681 static void encode_exchange_id(struct xdr_stream *xdr,
1682                                struct nfs41_exchange_id_args *args,
1683                                struct compound_hdr *hdr)
1684 {
1685         __be32 *p;
1686
1687         p = reserve_space(xdr, 4 + sizeof(args->verifier->data));
1688         *p++ = cpu_to_be32(OP_EXCHANGE_ID);
1689         xdr_encode_opaque_fixed(p, args->verifier->data, sizeof(args->verifier->data));
1690
1691         encode_string(xdr, args->id_len, args->id);
1692
1693         p = reserve_space(xdr, 12);
1694         *p++ = cpu_to_be32(args->flags);
1695         *p++ = cpu_to_be32(0);  /* zero length state_protect4_a */
1696         *p = cpu_to_be32(0);    /* zero length implementation id array */
1697         hdr->nops++;
1698         hdr->replen += decode_exchange_id_maxsz;
1699 }
1700
1701 static void encode_create_session(struct xdr_stream *xdr,
1702                                   struct nfs41_create_session_args *args,
1703                                   struct compound_hdr *hdr)
1704 {
1705         __be32 *p;
1706         char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1707         uint32_t len;
1708         struct nfs_client *clp = args->client;
1709         u32 max_resp_sz_cached;
1710
1711         /*
1712          * Assumes OPEN is the biggest non-idempotent compound.
1713          * 2 is the verifier.
1714          */
1715         max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1716                               RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1717
1718         len = scnprintf(machine_name, sizeof(machine_name), "%s",
1719                         clp->cl_ipaddr);
1720
1721         p = reserve_space(xdr, 20 + 2*28 + 20 + len + 12);
1722         *p++ = cpu_to_be32(OP_CREATE_SESSION);
1723         p = xdr_encode_hyper(p, clp->cl_clientid);
1724         *p++ = cpu_to_be32(clp->cl_seqid);                      /*Sequence id */
1725         *p++ = cpu_to_be32(args->flags);                        /*flags */
1726
1727         /* Fore Channel */
1728         *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
1729         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1730         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1731         *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1732         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1733         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1734         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1735
1736         /* Back Channel */
1737         *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
1738         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1739         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1740         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1741         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1742         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1743         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1744
1745         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1746         *p++ = cpu_to_be32(1);
1747         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1748
1749         /* authsys_parms rfc1831 */
1750         *p++ = cpu_to_be32((u32)clp->cl_boot_time.tv_nsec);     /* stamp */
1751         p = xdr_encode_opaque(p, machine_name, len);
1752         *p++ = cpu_to_be32(0);                          /* UID */
1753         *p++ = cpu_to_be32(0);                          /* GID */
1754         *p = cpu_to_be32(0);                            /* No more gids */
1755         hdr->nops++;
1756         hdr->replen += decode_create_session_maxsz;
1757 }
1758
1759 static void encode_destroy_session(struct xdr_stream *xdr,
1760                                    struct nfs4_session *session,
1761                                    struct compound_hdr *hdr)
1762 {
1763         __be32 *p;
1764         p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN);
1765         *p++ = cpu_to_be32(OP_DESTROY_SESSION);
1766         xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1767         hdr->nops++;
1768         hdr->replen += decode_destroy_session_maxsz;
1769 }
1770
1771 static void encode_reclaim_complete(struct xdr_stream *xdr,
1772                                     struct nfs41_reclaim_complete_args *args,
1773                                     struct compound_hdr *hdr)
1774 {
1775         __be32 *p;
1776
1777         p = reserve_space(xdr, 8);
1778         *p++ = cpu_to_be32(OP_RECLAIM_COMPLETE);
1779         *p++ = cpu_to_be32(args->one_fs);
1780         hdr->nops++;
1781         hdr->replen += decode_reclaim_complete_maxsz;
1782 }
1783 #endif /* CONFIG_NFS_V4_1 */
1784
1785 static void encode_sequence(struct xdr_stream *xdr,
1786                             const struct nfs4_sequence_args *args,
1787                             struct compound_hdr *hdr)
1788 {
1789 #if defined(CONFIG_NFS_V4_1)
1790         struct nfs4_session *session = args->sa_session;
1791         struct nfs4_slot_table *tp;
1792         struct nfs4_slot *slot;
1793         __be32 *p;
1794
1795         if (!session)
1796                 return;
1797
1798         tp = &session->fc_slot_table;
1799
1800         WARN_ON(args->sa_slotid == NFS4_MAX_SLOT_TABLE);
1801         slot = tp->slots + args->sa_slotid;
1802
1803         p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN + 16);
1804         *p++ = cpu_to_be32(OP_SEQUENCE);
1805
1806         /*
1807          * Sessionid + seqid + slotid + max slotid + cache_this
1808          */
1809         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1810                 "max_slotid=%d cache_this=%d\n",
1811                 __func__,
1812                 ((u32 *)session->sess_id.data)[0],
1813                 ((u32 *)session->sess_id.data)[1],
1814                 ((u32 *)session->sess_id.data)[2],
1815                 ((u32 *)session->sess_id.data)[3],
1816                 slot->seq_nr, args->sa_slotid,
1817                 tp->highest_used_slotid, args->sa_cache_this);
1818         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1819         *p++ = cpu_to_be32(slot->seq_nr);
1820         *p++ = cpu_to_be32(args->sa_slotid);
1821         *p++ = cpu_to_be32(tp->highest_used_slotid);
1822         *p = cpu_to_be32(args->sa_cache_this);
1823         hdr->nops++;
1824         hdr->replen += decode_sequence_maxsz;
1825 #endif /* CONFIG_NFS_V4_1 */
1826 }
1827
1828 #ifdef CONFIG_NFS_V4_1
1829 static void
1830 encode_getdeviceinfo(struct xdr_stream *xdr,
1831                      const struct nfs4_getdeviceinfo_args *args,
1832                      struct compound_hdr *hdr)
1833 {
1834         __be32 *p;
1835
1836         p = reserve_space(xdr, 16 + NFS4_DEVICEID4_SIZE);
1837         *p++ = cpu_to_be32(OP_GETDEVICEINFO);
1838         p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1839                                     NFS4_DEVICEID4_SIZE);
1840         *p++ = cpu_to_be32(args->pdev->layout_type);
1841         *p++ = cpu_to_be32(args->pdev->pglen);          /* gdia_maxcount */
1842         *p++ = cpu_to_be32(0);                          /* bitmap length 0 */
1843         hdr->nops++;
1844         hdr->replen += decode_getdeviceinfo_maxsz;
1845 }
1846
1847 static void
1848 encode_layoutget(struct xdr_stream *xdr,
1849                       const struct nfs4_layoutget_args *args,
1850                       struct compound_hdr *hdr)
1851 {
1852         __be32 *p;
1853
1854         p = reserve_space(xdr, 44 + NFS4_STATEID_SIZE);
1855         *p++ = cpu_to_be32(OP_LAYOUTGET);
1856         *p++ = cpu_to_be32(0);     /* Signal layout available */
1857         *p++ = cpu_to_be32(args->type);
1858         *p++ = cpu_to_be32(args->range.iomode);
1859         p = xdr_encode_hyper(p, args->range.offset);
1860         p = xdr_encode_hyper(p, args->range.length);
1861         p = xdr_encode_hyper(p, args->minlength);
1862         p = xdr_encode_opaque_fixed(p, &args->stateid.data, NFS4_STATEID_SIZE);
1863         *p = cpu_to_be32(args->maxcount);
1864
1865         dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1866                 __func__,
1867                 args->type,
1868                 args->range.iomode,
1869                 (unsigned long)args->range.offset,
1870                 (unsigned long)args->range.length,
1871                 args->maxcount);
1872         hdr->nops++;
1873         hdr->replen += decode_layoutget_maxsz;
1874 }
1875
1876 static int
1877 encode_layoutcommit(struct xdr_stream *xdr,
1878                     const struct nfs4_layoutcommit_args *args,
1879                     struct compound_hdr *hdr)
1880 {
1881         __be32 *p;
1882
1883         dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1884                 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1885
1886         p = reserve_space(xdr, 48 + NFS4_STATEID_SIZE);
1887         *p++ = cpu_to_be32(OP_LAYOUTCOMMIT);
1888         /* Only whole file layouts */
1889         p = xdr_encode_hyper(p, 0); /* offset */
1890         p = xdr_encode_hyper(p, NFS4_MAX_UINT64); /* length */
1891         *p++ = cpu_to_be32(0); /* reclaim */
1892         p = xdr_encode_opaque_fixed(p, args->stateid.data, NFS4_STATEID_SIZE);
1893         *p++ = cpu_to_be32(1); /* newoffset = TRUE */
1894         p = xdr_encode_hyper(p, args->lastbytewritten);
1895         *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
1896         *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
1897         *p++ = cpu_to_be32(0); /* no file layout payload */
1898
1899         hdr->nops++;
1900         hdr->replen += decode_layoutcommit_maxsz;
1901         return 0;
1902 }
1903
1904 static void
1905 encode_layoutreturn(struct xdr_stream *xdr,
1906                     const struct nfs4_layoutreturn_args *args,
1907                     struct compound_hdr *hdr)
1908 {
1909         __be32 *p;
1910
1911         p = reserve_space(xdr, 20);
1912         *p++ = cpu_to_be32(OP_LAYOUTRETURN);
1913         *p++ = cpu_to_be32(0);          /* reclaim. always 0 for now */
1914         *p++ = cpu_to_be32(args->layout_type);
1915         *p++ = cpu_to_be32(IOMODE_ANY);
1916         *p = cpu_to_be32(RETURN_FILE);
1917         p = reserve_space(xdr, 16 + NFS4_STATEID_SIZE);
1918         p = xdr_encode_hyper(p, 0);
1919         p = xdr_encode_hyper(p, NFS4_MAX_UINT64);
1920         spin_lock(&args->inode->i_lock);
1921         xdr_encode_opaque_fixed(p, &args->stateid.data, NFS4_STATEID_SIZE);
1922         spin_unlock(&args->inode->i_lock);
1923         if (NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn) {
1924                 NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn(
1925                         NFS_I(args->inode)->layout, xdr, args);
1926         } else {
1927                 p = reserve_space(xdr, 4);
1928                 *p = cpu_to_be32(0);
1929         }
1930         hdr->nops++;
1931         hdr->replen += decode_layoutreturn_maxsz;
1932 }
1933 #endif /* CONFIG_NFS_V4_1 */
1934
1935 /*
1936  * END OF "GENERIC" ENCODE ROUTINES.
1937  */
1938
1939 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
1940 {
1941 #if defined(CONFIG_NFS_V4_1)
1942         if (args->sa_session)
1943                 return args->sa_session->clp->cl_mvops->minor_version;
1944 #endif /* CONFIG_NFS_V4_1 */
1945         return 0;
1946 }
1947
1948 /*
1949  * Encode an ACCESS request
1950  */
1951 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
1952                                 const struct nfs4_accessargs *args)
1953 {
1954         struct compound_hdr hdr = {
1955                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1956         };
1957
1958         encode_compound_hdr(xdr, req, &hdr);
1959         encode_sequence(xdr, &args->seq_args, &hdr);
1960         encode_putfh(xdr, args->fh, &hdr);
1961         encode_access(xdr, args->access, &hdr);
1962         encode_getfattr(xdr, args->bitmask, &hdr);
1963         encode_nops(&hdr);
1964 }
1965
1966 /*
1967  * Encode LOOKUP request
1968  */
1969 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
1970                                 const struct nfs4_lookup_arg *args)
1971 {
1972         struct compound_hdr hdr = {
1973                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1974         };
1975
1976         encode_compound_hdr(xdr, req, &hdr);
1977         encode_sequence(xdr, &args->seq_args, &hdr);
1978         encode_putfh(xdr, args->dir_fh, &hdr);
1979         encode_lookup(xdr, args->name, &hdr);
1980         encode_getfh(xdr, &hdr);
1981         encode_getfattr(xdr, args->bitmask, &hdr);
1982         encode_nops(&hdr);
1983 }
1984
1985 /*
1986  * Encode LOOKUP_ROOT request
1987  */
1988 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
1989                                      struct xdr_stream *xdr,
1990                                      const struct nfs4_lookup_root_arg *args)
1991 {
1992         struct compound_hdr hdr = {
1993                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1994         };
1995
1996         encode_compound_hdr(xdr, req, &hdr);
1997         encode_sequence(xdr, &args->seq_args, &hdr);
1998         encode_putrootfh(xdr, &hdr);
1999         encode_getfh(xdr, &hdr);
2000         encode_getfattr(xdr, args->bitmask, &hdr);
2001         encode_nops(&hdr);
2002 }
2003
2004 /*
2005  * Encode REMOVE request
2006  */
2007 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2008                                 const struct nfs_removeargs *args)
2009 {
2010         struct compound_hdr hdr = {
2011                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2012         };
2013
2014         encode_compound_hdr(xdr, req, &hdr);
2015         encode_sequence(xdr, &args->seq_args, &hdr);
2016         encode_putfh(xdr, args->fh, &hdr);
2017         encode_remove(xdr, &args->name, &hdr);
2018         encode_getfattr(xdr, args->bitmask, &hdr);
2019         encode_nops(&hdr);
2020 }
2021
2022 /*
2023  * Encode RENAME request
2024  */
2025 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2026                                 const struct nfs_renameargs *args)
2027 {
2028         struct compound_hdr hdr = {
2029                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2030         };
2031
2032         encode_compound_hdr(xdr, req, &hdr);
2033         encode_sequence(xdr, &args->seq_args, &hdr);
2034         encode_putfh(xdr, args->old_dir, &hdr);
2035         encode_savefh(xdr, &hdr);
2036         encode_putfh(xdr, args->new_dir, &hdr);
2037         encode_rename(xdr, args->old_name, args->new_name, &hdr);
2038         encode_getfattr(xdr, args->bitmask, &hdr);
2039         encode_restorefh(xdr, &hdr);
2040         encode_getfattr(xdr, args->bitmask, &hdr);
2041         encode_nops(&hdr);
2042 }
2043
2044 /*
2045  * Encode LINK request
2046  */
2047 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2048                              const struct nfs4_link_arg *args)
2049 {
2050         struct compound_hdr hdr = {
2051                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2052         };
2053
2054         encode_compound_hdr(xdr, req, &hdr);
2055         encode_sequence(xdr, &args->seq_args, &hdr);
2056         encode_putfh(xdr, args->fh, &hdr);
2057         encode_savefh(xdr, &hdr);
2058         encode_putfh(xdr, args->dir_fh, &hdr);
2059         encode_link(xdr, args->name, &hdr);
2060         encode_getfattr(xdr, args->bitmask, &hdr);
2061         encode_restorefh(xdr, &hdr);
2062         encode_getfattr(xdr, args->bitmask, &hdr);
2063         encode_nops(&hdr);
2064 }
2065
2066 /*
2067  * Encode CREATE request
2068  */
2069 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2070                                 const struct nfs4_create_arg *args)
2071 {
2072         struct compound_hdr hdr = {
2073                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2074         };
2075
2076         encode_compound_hdr(xdr, req, &hdr);
2077         encode_sequence(xdr, &args->seq_args, &hdr);
2078         encode_putfh(xdr, args->dir_fh, &hdr);
2079         encode_savefh(xdr, &hdr);
2080         encode_create(xdr, args, &hdr);
2081         encode_getfh(xdr, &hdr);
2082         encode_getfattr(xdr, args->bitmask, &hdr);
2083         encode_restorefh(xdr, &hdr);
2084         encode_getfattr(xdr, args->bitmask, &hdr);
2085         encode_nops(&hdr);
2086 }
2087
2088 /*
2089  * Encode SYMLINK request
2090  */
2091 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2092                                  const struct nfs4_create_arg *args)
2093 {
2094         nfs4_xdr_enc_create(req, xdr, args);
2095 }
2096
2097 /*
2098  * Encode GETATTR request
2099  */
2100 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2101                                  const struct nfs4_getattr_arg *args)
2102 {
2103         struct compound_hdr hdr = {
2104                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2105         };
2106
2107         encode_compound_hdr(xdr, req, &hdr);
2108         encode_sequence(xdr, &args->seq_args, &hdr);
2109         encode_putfh(xdr, args->fh, &hdr);
2110         encode_getfattr(xdr, args->bitmask, &hdr);
2111         encode_nops(&hdr);
2112 }
2113
2114 /*
2115  * Encode a CLOSE request
2116  */
2117 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2118                                struct nfs_closeargs *args)
2119 {
2120         struct compound_hdr hdr = {
2121                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2122         };
2123
2124         encode_compound_hdr(xdr, req, &hdr);
2125         encode_sequence(xdr, &args->seq_args, &hdr);
2126         encode_putfh(xdr, args->fh, &hdr);
2127         encode_close(xdr, args, &hdr);
2128         encode_getfattr(xdr, args->bitmask, &hdr);
2129         encode_nops(&hdr);
2130 }
2131
2132 /*
2133  * Encode an OPEN request
2134  */
2135 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2136                               struct nfs_openargs *args)
2137 {
2138         struct compound_hdr hdr = {
2139                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2140         };
2141
2142         encode_compound_hdr(xdr, req, &hdr);
2143         encode_sequence(xdr, &args->seq_args, &hdr);
2144         encode_putfh(xdr, args->fh, &hdr);
2145         encode_savefh(xdr, &hdr);
2146         encode_open(xdr, args, &hdr);
2147         encode_getfh(xdr, &hdr);
2148         encode_getfattr(xdr, args->bitmask, &hdr);
2149         encode_restorefh(xdr, &hdr);
2150         encode_getfattr(xdr, args->bitmask, &hdr);
2151         encode_nops(&hdr);
2152 }
2153
2154 /*
2155  * Encode an OPEN_CONFIRM request
2156  */
2157 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2158                                       struct xdr_stream *xdr,
2159                                       struct nfs_open_confirmargs *args)
2160 {
2161         struct compound_hdr hdr = {
2162                 .nops   = 0,
2163         };
2164
2165         encode_compound_hdr(xdr, req, &hdr);
2166         encode_putfh(xdr, args->fh, &hdr);
2167         encode_open_confirm(xdr, args, &hdr);
2168         encode_nops(&hdr);
2169 }
2170
2171 /*
2172  * Encode an OPEN request with no attributes.
2173  */
2174 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2175                                      struct xdr_stream *xdr,
2176                                      struct nfs_openargs *args)
2177 {
2178         struct compound_hdr hdr = {
2179                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2180         };
2181
2182         encode_compound_hdr(xdr, req, &hdr);
2183         encode_sequence(xdr, &args->seq_args, &hdr);
2184         encode_putfh(xdr, args->fh, &hdr);
2185         encode_open(xdr, args, &hdr);
2186         encode_getfattr(xdr, args->bitmask, &hdr);
2187         encode_nops(&hdr);
2188 }
2189
2190 /*
2191  * Encode an OPEN_DOWNGRADE request
2192  */
2193 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2194                                         struct xdr_stream *xdr,
2195                                         struct nfs_closeargs *args)
2196 {
2197         struct compound_hdr hdr = {
2198                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2199         };
2200
2201         encode_compound_hdr(xdr, req, &hdr);
2202         encode_sequence(xdr, &args->seq_args, &hdr);
2203         encode_putfh(xdr, args->fh, &hdr);
2204         encode_open_downgrade(xdr, args, &hdr);
2205         encode_getfattr(xdr, args->bitmask, &hdr);
2206         encode_nops(&hdr);
2207 }
2208
2209 /*
2210  * Encode a LOCK request
2211  */
2212 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2213                               struct nfs_lock_args *args)
2214 {
2215         struct compound_hdr hdr = {
2216                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2217         };
2218
2219         encode_compound_hdr(xdr, req, &hdr);
2220         encode_sequence(xdr, &args->seq_args, &hdr);
2221         encode_putfh(xdr, args->fh, &hdr);
2222         encode_lock(xdr, args, &hdr);
2223         encode_nops(&hdr);
2224 }
2225
2226 /*
2227  * Encode a LOCKT request
2228  */
2229 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2230                                struct nfs_lockt_args *args)
2231 {
2232         struct compound_hdr hdr = {
2233                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2234         };
2235
2236         encode_compound_hdr(xdr, req, &hdr);
2237         encode_sequence(xdr, &args->seq_args, &hdr);
2238         encode_putfh(xdr, args->fh, &hdr);
2239         encode_lockt(xdr, args, &hdr);
2240         encode_nops(&hdr);
2241 }
2242
2243 /*
2244  * Encode a LOCKU request
2245  */
2246 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2247                                struct nfs_locku_args *args)
2248 {
2249         struct compound_hdr hdr = {
2250                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2251         };
2252
2253         encode_compound_hdr(xdr, req, &hdr);
2254         encode_sequence(xdr, &args->seq_args, &hdr);
2255         encode_putfh(xdr, args->fh, &hdr);
2256         encode_locku(xdr, args, &hdr);
2257         encode_nops(&hdr);
2258 }
2259
2260 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2261                                            struct xdr_stream *xdr,
2262                                         struct nfs_release_lockowner_args *args)
2263 {
2264         struct compound_hdr hdr = {
2265                 .minorversion = 0,
2266         };
2267
2268         encode_compound_hdr(xdr, req, &hdr);
2269         encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2270         encode_nops(&hdr);
2271 }
2272
2273 /*
2274  * Encode a READLINK request
2275  */
2276 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2277                                   const struct nfs4_readlink *args)
2278 {
2279         struct compound_hdr hdr = {
2280                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2281         };
2282
2283         encode_compound_hdr(xdr, req, &hdr);
2284         encode_sequence(xdr, &args->seq_args, &hdr);
2285         encode_putfh(xdr, args->fh, &hdr);
2286         encode_readlink(xdr, args, req, &hdr);
2287
2288         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2289                         args->pgbase, args->pglen);
2290         encode_nops(&hdr);
2291 }
2292
2293 /*
2294  * Encode a READDIR request
2295  */
2296 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2297                                  const struct nfs4_readdir_arg *args)
2298 {
2299         struct compound_hdr hdr = {
2300                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2301         };
2302
2303         encode_compound_hdr(xdr, req, &hdr);
2304         encode_sequence(xdr, &args->seq_args, &hdr);
2305         encode_putfh(xdr, args->fh, &hdr);
2306         encode_readdir(xdr, args, req, &hdr);
2307
2308         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2309                          args->pgbase, args->count);
2310         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2311                         __func__, hdr.replen << 2, args->pages,
2312                         args->pgbase, args->count);
2313         encode_nops(&hdr);
2314 }
2315
2316 /*
2317  * Encode a READ request
2318  */
2319 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2320                               struct nfs_readargs *args)
2321 {
2322         struct compound_hdr hdr = {
2323                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2324         };
2325
2326         encode_compound_hdr(xdr, req, &hdr);
2327         encode_sequence(xdr, &args->seq_args, &hdr);
2328         encode_putfh(xdr, args->fh, &hdr);
2329         encode_read(xdr, args, &hdr);
2330
2331         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2332                          args->pages, args->pgbase, args->count);
2333         req->rq_rcv_buf.flags |= XDRBUF_READ;
2334         encode_nops(&hdr);
2335 }
2336
2337 /*
2338  * Encode an SETATTR request
2339  */
2340 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2341                                  struct nfs_setattrargs *args)
2342 {
2343         struct compound_hdr hdr = {
2344                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2345         };
2346
2347         encode_compound_hdr(xdr, req, &hdr);
2348         encode_sequence(xdr, &args->seq_args, &hdr);
2349         encode_putfh(xdr, args->fh, &hdr);
2350         encode_setattr(xdr, args, args->server, &hdr);
2351         encode_getfattr(xdr, args->bitmask, &hdr);
2352         encode_nops(&hdr);
2353 }
2354
2355 /*
2356  * Encode a GETACL request
2357  */
2358 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2359                                 struct nfs_getaclargs *args)
2360 {
2361         struct compound_hdr hdr = {
2362                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2363         };
2364         uint32_t replen;
2365
2366         encode_compound_hdr(xdr, req, &hdr);
2367         encode_sequence(xdr, &args->seq_args, &hdr);
2368         encode_putfh(xdr, args->fh, &hdr);
2369         replen = hdr.replen + op_decode_hdr_maxsz + nfs4_fattr_bitmap_maxsz + 1;
2370         encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2371
2372         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2373                 args->acl_pages, args->acl_pgbase, args->acl_len);
2374         encode_nops(&hdr);
2375 }
2376
2377 /*
2378  * Encode a WRITE request
2379  */
2380 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2381                                struct nfs_writeargs *args)
2382 {
2383         struct compound_hdr hdr = {
2384                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2385         };
2386
2387         encode_compound_hdr(xdr, req, &hdr);
2388         encode_sequence(xdr, &args->seq_args, &hdr);
2389         encode_putfh(xdr, args->fh, &hdr);
2390         encode_write(xdr, args, &hdr);
2391         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2392         if (args->bitmask)
2393                 encode_getfattr(xdr, args->bitmask, &hdr);
2394         encode_nops(&hdr);
2395 }
2396
2397 /*
2398  *  a COMMIT request
2399  */
2400 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2401                                 struct nfs_writeargs *args)
2402 {
2403         struct compound_hdr hdr = {
2404                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2405         };
2406
2407         encode_compound_hdr(xdr, req, &hdr);
2408         encode_sequence(xdr, &args->seq_args, &hdr);
2409         encode_putfh(xdr, args->fh, &hdr);
2410         encode_commit(xdr, args, &hdr);
2411         if (args->bitmask)
2412                 encode_getfattr(xdr, args->bitmask, &hdr);
2413         encode_nops(&hdr);
2414 }
2415
2416 /*
2417  * FSINFO request
2418  */
2419 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2420                                 struct nfs4_fsinfo_arg *args)
2421 {
2422         struct compound_hdr hdr = {
2423                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2424         };
2425
2426         encode_compound_hdr(xdr, req, &hdr);
2427         encode_sequence(xdr, &args->seq_args, &hdr);
2428         encode_putfh(xdr, args->fh, &hdr);
2429         encode_fsinfo(xdr, args->bitmask, &hdr);
2430         encode_nops(&hdr);
2431 }
2432
2433 /*
2434  * a PATHCONF request
2435  */
2436 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2437                                   const struct nfs4_pathconf_arg *args)
2438 {
2439         struct compound_hdr hdr = {
2440                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2441         };
2442
2443         encode_compound_hdr(xdr, req, &hdr);
2444         encode_sequence(xdr, &args->seq_args, &hdr);
2445         encode_putfh(xdr, args->fh, &hdr);
2446         encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2447                            &hdr);
2448         encode_nops(&hdr);
2449 }
2450
2451 /*
2452  * a STATFS request
2453  */
2454 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2455                                 const struct nfs4_statfs_arg *args)
2456 {
2457         struct compound_hdr hdr = {
2458                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2459         };
2460
2461         encode_compound_hdr(xdr, req, &hdr);
2462         encode_sequence(xdr, &args->seq_args, &hdr);
2463         encode_putfh(xdr, args->fh, &hdr);
2464         encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2465                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2466         encode_nops(&hdr);
2467 }
2468
2469 /*
2470  * GETATTR_BITMAP request
2471  */
2472 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2473                                      struct xdr_stream *xdr,
2474                                      struct nfs4_server_caps_arg *args)
2475 {
2476         struct compound_hdr hdr = {
2477                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2478         };
2479
2480         encode_compound_hdr(xdr, req, &hdr);
2481         encode_sequence(xdr, &args->seq_args, &hdr);
2482         encode_putfh(xdr, args->fhandle, &hdr);
2483         encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2484                            FATTR4_WORD0_LINK_SUPPORT|
2485                            FATTR4_WORD0_SYMLINK_SUPPORT|
2486                            FATTR4_WORD0_ACLSUPPORT, &hdr);
2487         encode_nops(&hdr);
2488 }
2489
2490 /*
2491  * a RENEW request
2492  */
2493 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2494                                struct nfs_client *clp)
2495 {
2496         struct compound_hdr hdr = {
2497                 .nops   = 0,
2498         };
2499
2500         encode_compound_hdr(xdr, req, &hdr);
2501         encode_renew(xdr, clp, &hdr);
2502         encode_nops(&hdr);
2503 }
2504
2505 /*
2506  * a SETCLIENTID request
2507  */
2508 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2509                                      struct xdr_stream *xdr,
2510                                      struct nfs4_setclientid *sc)
2511 {
2512         struct compound_hdr hdr = {
2513                 .nops   = 0,
2514         };
2515
2516         encode_compound_hdr(xdr, req, &hdr);
2517         encode_setclientid(xdr, sc, &hdr);
2518         encode_nops(&hdr);
2519 }
2520
2521 /*
2522  * a SETCLIENTID_CONFIRM request
2523  */
2524 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2525                                              struct xdr_stream *xdr,
2526                                              struct nfs4_setclientid_res *arg)
2527 {
2528         struct compound_hdr hdr = {
2529                 .nops   = 0,
2530         };
2531         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2532
2533         encode_compound_hdr(xdr, req, &hdr);
2534         encode_setclientid_confirm(xdr, arg, &hdr);
2535         encode_putrootfh(xdr, &hdr);
2536         encode_fsinfo(xdr, lease_bitmap, &hdr);
2537         encode_nops(&hdr);
2538 }
2539
2540 /*
2541  * DELEGRETURN request
2542  */
2543 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2544                                      struct xdr_stream *xdr,
2545                                      const struct nfs4_delegreturnargs *args)
2546 {
2547         struct compound_hdr hdr = {
2548                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2549         };
2550
2551         encode_compound_hdr(xdr, req, &hdr);
2552         encode_sequence(xdr, &args->seq_args, &hdr);
2553         encode_putfh(xdr, args->fhandle, &hdr);
2554         encode_delegreturn(xdr, args->stateid, &hdr);
2555         encode_getfattr(xdr, args->bitmask, &hdr);
2556         encode_nops(&hdr);
2557 }
2558
2559 /*
2560  * Encode FS_LOCATIONS request
2561  */
2562 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2563                                       struct xdr_stream *xdr,
2564                                       struct nfs4_fs_locations_arg *args)
2565 {
2566         struct compound_hdr hdr = {
2567                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2568         };
2569         uint32_t replen;
2570
2571         encode_compound_hdr(xdr, req, &hdr);
2572         encode_sequence(xdr, &args->seq_args, &hdr);
2573         encode_putfh(xdr, args->dir_fh, &hdr);
2574         encode_lookup(xdr, args->name, &hdr);
2575         replen = hdr.replen;    /* get the attribute into args->page */
2576         encode_fs_locations(xdr, args->bitmask, &hdr);
2577
2578         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2579                         0, PAGE_SIZE);
2580         encode_nops(&hdr);
2581 }
2582
2583 /*
2584  * Encode SECINFO request
2585  */
2586 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2587                                 struct xdr_stream *xdr,
2588                                 struct nfs4_secinfo_arg *args)
2589 {
2590         struct compound_hdr hdr = {
2591                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2592         };
2593
2594         encode_compound_hdr(xdr, req, &hdr);
2595         encode_sequence(xdr, &args->seq_args, &hdr);
2596         encode_putfh(xdr, args->dir_fh, &hdr);
2597         encode_secinfo(xdr, args->name, &hdr);
2598         encode_nops(&hdr);
2599 }
2600
2601 #if defined(CONFIG_NFS_V4_1)
2602 /*
2603  * EXCHANGE_ID request
2604  */
2605 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2606                                      struct xdr_stream *xdr,
2607                                      struct nfs41_exchange_id_args *args)
2608 {
2609         struct compound_hdr hdr = {
2610                 .minorversion = args->client->cl_mvops->minor_version,
2611         };
2612
2613         encode_compound_hdr(xdr, req, &hdr);
2614         encode_exchange_id(xdr, args, &hdr);
2615         encode_nops(&hdr);
2616 }
2617
2618 /*
2619  * a CREATE_SESSION request
2620  */
2621 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2622                                         struct xdr_stream *xdr,
2623                                         struct nfs41_create_session_args *args)
2624 {
2625         struct compound_hdr hdr = {
2626                 .minorversion = args->client->cl_mvops->minor_version,
2627         };
2628
2629         encode_compound_hdr(xdr, req, &hdr);
2630         encode_create_session(xdr, args, &hdr);
2631         encode_nops(&hdr);
2632 }
2633
2634 /*
2635  * a DESTROY_SESSION request
2636  */
2637 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2638                                          struct xdr_stream *xdr,
2639                                          struct nfs4_session *session)
2640 {
2641         struct compound_hdr hdr = {
2642                 .minorversion = session->clp->cl_mvops->minor_version,
2643         };
2644
2645         encode_compound_hdr(xdr, req, &hdr);
2646         encode_destroy_session(xdr, session, &hdr);
2647         encode_nops(&hdr);
2648 }
2649
2650 /*
2651  * a SEQUENCE request
2652  */
2653 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2654                                   struct nfs4_sequence_args *args)
2655 {
2656         struct compound_hdr hdr = {
2657                 .minorversion = nfs4_xdr_minorversion(args),
2658         };
2659
2660         encode_compound_hdr(xdr, req, &hdr);
2661         encode_sequence(xdr, args, &hdr);
2662         encode_nops(&hdr);
2663 }
2664
2665 /*
2666  * a GET_LEASE_TIME request
2667  */
2668 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2669                                         struct xdr_stream *xdr,
2670                                         struct nfs4_get_lease_time_args *args)
2671 {
2672         struct compound_hdr hdr = {
2673                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2674         };
2675         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2676
2677         encode_compound_hdr(xdr, req, &hdr);
2678         encode_sequence(xdr, &args->la_seq_args, &hdr);
2679         encode_putrootfh(xdr, &hdr);
2680         encode_fsinfo(xdr, lease_bitmap, &hdr);
2681         encode_nops(&hdr);
2682 }
2683
2684 /*
2685  * a RECLAIM_COMPLETE request
2686  */
2687 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2688                                           struct xdr_stream *xdr,
2689                                 struct nfs41_reclaim_complete_args *args)
2690 {
2691         struct compound_hdr hdr = {
2692                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2693         };
2694
2695         encode_compound_hdr(xdr, req, &hdr);
2696         encode_sequence(xdr, &args->seq_args, &hdr);
2697         encode_reclaim_complete(xdr, args, &hdr);
2698         encode_nops(&hdr);
2699 }
2700
2701 /*
2702  * Encode GETDEVICEINFO request
2703  */
2704 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2705                                        struct xdr_stream *xdr,
2706                                        struct nfs4_getdeviceinfo_args *args)
2707 {
2708         struct compound_hdr hdr = {
2709                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2710         };
2711
2712         encode_compound_hdr(xdr, req, &hdr);
2713         encode_sequence(xdr, &args->seq_args, &hdr);
2714         encode_getdeviceinfo(xdr, args, &hdr);
2715
2716         /* set up reply kvec. Subtract notification bitmap max size (2)
2717          * so that notification bitmap is put in xdr_buf tail */
2718         xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2719                          args->pdev->pages, args->pdev->pgbase,
2720                          args->pdev->pglen);
2721
2722         encode_nops(&hdr);
2723 }
2724
2725 /*
2726  *  Encode LAYOUTGET request
2727  */
2728 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2729                                    struct xdr_stream *xdr,
2730                                    struct nfs4_layoutget_args *args)
2731 {
2732         struct compound_hdr hdr = {
2733                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2734         };
2735
2736         encode_compound_hdr(xdr, req, &hdr);
2737         encode_sequence(xdr, &args->seq_args, &hdr);
2738         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2739         encode_layoutget(xdr, args, &hdr);
2740
2741         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2742             args->layout.pages, 0, args->layout.pglen);
2743
2744         encode_nops(&hdr);
2745 }
2746
2747 /*
2748  *  Encode LAYOUTCOMMIT request
2749  */
2750 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2751                                       struct xdr_stream *xdr,
2752                                       struct nfs4_layoutcommit_args *args)
2753 {
2754         struct compound_hdr hdr = {
2755                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2756         };
2757
2758         encode_compound_hdr(xdr, req, &hdr);
2759         encode_sequence(xdr, &args->seq_args, &hdr);
2760         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2761         encode_layoutcommit(xdr, args, &hdr);
2762         encode_getfattr(xdr, args->bitmask, &hdr);
2763         encode_nops(&hdr);
2764 }
2765
2766 /*
2767  * Encode LAYOUTRETURN request
2768  */
2769 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2770                                       struct xdr_stream *xdr,
2771                                       struct nfs4_layoutreturn_args *args)
2772 {
2773         struct compound_hdr hdr = {
2774                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2775         };
2776
2777         encode_compound_hdr(xdr, req, &hdr);
2778         encode_sequence(xdr, &args->seq_args, &hdr);
2779         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2780         encode_layoutreturn(xdr, args, &hdr);
2781         encode_nops(&hdr);
2782 }
2783 #endif /* CONFIG_NFS_V4_1 */
2784
2785 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
2786 {
2787         dprintk("nfs: %s: prematurely hit end of receive buffer. "
2788                 "Remaining buffer length is %tu words.\n",
2789                 func, xdr->end - xdr->p);
2790 }
2791
2792 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2793 {
2794         __be32 *p;
2795
2796         p = xdr_inline_decode(xdr, 4);
2797         if (unlikely(!p))
2798                 goto out_overflow;
2799         *len = be32_to_cpup(p);
2800         p = xdr_inline_decode(xdr, *len);
2801         if (unlikely(!p))
2802                 goto out_overflow;
2803         *string = (char *)p;
2804         return 0;
2805 out_overflow:
2806         print_overflow_msg(__func__, xdr);
2807         return -EIO;
2808 }
2809
2810 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2811 {
2812         __be32 *p;
2813
2814         p = xdr_inline_decode(xdr, 8);
2815         if (unlikely(!p))
2816                 goto out_overflow;
2817         hdr->status = be32_to_cpup(p++);
2818         hdr->taglen = be32_to_cpup(p);
2819
2820         p = xdr_inline_decode(xdr, hdr->taglen + 4);
2821         if (unlikely(!p))
2822                 goto out_overflow;
2823         hdr->tag = (char *)p;
2824         p += XDR_QUADLEN(hdr->taglen);
2825         hdr->nops = be32_to_cpup(p);
2826         if (unlikely(hdr->nops < 1))
2827                 return nfs4_stat_to_errno(hdr->status);
2828         return 0;
2829 out_overflow:
2830         print_overflow_msg(__func__, xdr);
2831         return -EIO;
2832 }
2833
2834 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2835 {
2836         __be32 *p;
2837         uint32_t opnum;
2838         int32_t nfserr;
2839
2840         p = xdr_inline_decode(xdr, 8);
2841         if (unlikely(!p))
2842                 goto out_overflow;
2843         opnum = be32_to_cpup(p++);
2844         if (opnum != expected) {
2845                 dprintk("nfs: Server returned operation"
2846                         " %d but we issued a request for %d\n",
2847                                 opnum, expected);
2848                 return -EIO;
2849         }
2850         nfserr = be32_to_cpup(p);
2851         if (nfserr != NFS_OK)
2852                 return nfs4_stat_to_errno(nfserr);
2853         return 0;
2854 out_overflow:
2855         print_overflow_msg(__func__, xdr);
2856         return -EIO;
2857 }
2858
2859 /* Dummy routine */
2860 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2861 {
2862         __be32 *p;
2863         unsigned int strlen;
2864         char *str;
2865
2866         p = xdr_inline_decode(xdr, 12);
2867         if (likely(p))
2868                 return decode_opaque_inline(xdr, &strlen, &str);
2869         print_overflow_msg(__func__, xdr);
2870         return -EIO;
2871 }
2872
2873 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2874 {
2875         uint32_t bmlen;
2876         __be32 *p;
2877
2878         p = xdr_inline_decode(xdr, 4);
2879         if (unlikely(!p))
2880                 goto out_overflow;
2881         bmlen = be32_to_cpup(p);
2882
2883         bitmap[0] = bitmap[1] = 0;
2884         p = xdr_inline_decode(xdr, (bmlen << 2));
2885         if (unlikely(!p))
2886                 goto out_overflow;
2887         if (bmlen > 0) {
2888                 bitmap[0] = be32_to_cpup(p++);
2889                 if (bmlen > 1)
2890                         bitmap[1] = be32_to_cpup(p);
2891         }
2892         return 0;
2893 out_overflow:
2894         print_overflow_msg(__func__, xdr);
2895         return -EIO;
2896 }
2897
2898 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
2899 {
2900         __be32 *p;
2901
2902         p = xdr_inline_decode(xdr, 4);
2903         if (unlikely(!p))
2904                 goto out_overflow;
2905         *attrlen = be32_to_cpup(p);
2906         *savep = xdr->p;
2907         return 0;
2908 out_overflow:
2909         print_overflow_msg(__func__, xdr);
2910         return -EIO;
2911 }
2912
2913 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2914 {
2915         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2916                 int ret;
2917                 ret = decode_attr_bitmap(xdr, bitmask);
2918                 if (unlikely(ret < 0))
2919                         return ret;
2920                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2921         } else
2922                 bitmask[0] = bitmask[1] = 0;
2923         dprintk("%s: bitmask=%08x:%08x\n", __func__, bitmask[0], bitmask[1]);
2924         return 0;
2925 }
2926
2927 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2928 {
2929         __be32 *p;
2930         int ret = 0;
2931
2932         *type = 0;
2933         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2934                 return -EIO;
2935         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2936                 p = xdr_inline_decode(xdr, 4);
2937                 if (unlikely(!p))
2938                         goto out_overflow;
2939                 *type = be32_to_cpup(p);
2940                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2941                         dprintk("%s: bad type %d\n", __func__, *type);
2942                         return -EIO;
2943                 }
2944                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2945                 ret = NFS_ATTR_FATTR_TYPE;
2946         }
2947         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
2948         return ret;
2949 out_overflow:
2950         print_overflow_msg(__func__, xdr);
2951         return -EIO;
2952 }
2953
2954 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2955 {
2956         __be32 *p;
2957         int ret = 0;
2958
2959         *change = 0;
2960         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2961                 return -EIO;
2962         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2963                 p = xdr_inline_decode(xdr, 8);
2964                 if (unlikely(!p))
2965                         goto out_overflow;
2966                 xdr_decode_hyper(p, change);
2967                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2968                 ret = NFS_ATTR_FATTR_CHANGE;
2969         }
2970         dprintk("%s: change attribute=%Lu\n", __func__,
2971                         (unsigned long long)*change);
2972         return ret;
2973 out_overflow:
2974         print_overflow_msg(__func__, xdr);
2975         return -EIO;
2976 }
2977
2978 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2979 {
2980         __be32 *p;
2981         int ret = 0;
2982
2983         *size = 0;
2984         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2985                 return -EIO;
2986         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2987                 p = xdr_inline_decode(xdr, 8);
2988                 if (unlikely(!p))
2989                         goto out_overflow;
2990                 xdr_decode_hyper(p, size);
2991                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2992                 ret = NFS_ATTR_FATTR_SIZE;
2993         }
2994         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
2995         return ret;
2996 out_overflow:
2997         print_overflow_msg(__func__, xdr);
2998         return -EIO;
2999 }
3000
3001 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3002 {
3003         __be32 *p;
3004
3005         *res = 0;
3006         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3007                 return -EIO;
3008         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3009                 p = xdr_inline_decode(xdr, 4);
3010                 if (unlikely(!p))
3011                         goto out_overflow;
3012                 *res = be32_to_cpup(p);
3013                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3014         }
3015         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3016         return 0;
3017 out_overflow:
3018         print_overflow_msg(__func__, xdr);
3019         return -EIO;
3020 }
3021
3022 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3023 {
3024         __be32 *p;
3025
3026         *res = 0;
3027         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3028                 return -EIO;
3029         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3030                 p = xdr_inline_decode(xdr, 4);
3031                 if (unlikely(!p))
3032                         goto out_overflow;
3033                 *res = be32_to_cpup(p);
3034                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3035         }
3036         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3037         return 0;
3038 out_overflow:
3039         print_overflow_msg(__func__, xdr);
3040         return -EIO;
3041 }
3042
3043 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3044 {
3045         __be32 *p;
3046         int ret = 0;
3047
3048         fsid->major = 0;
3049         fsid->minor = 0;
3050         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3051                 return -EIO;
3052         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3053                 p = xdr_inline_decode(xdr, 16);
3054                 if (unlikely(!p))
3055                         goto out_overflow;
3056                 p = xdr_decode_hyper(p, &fsid->major);
3057                 xdr_decode_hyper(p, &fsid->minor);
3058                 bitmap[0] &= ~FATTR4_WORD0_FSID;
3059                 ret = NFS_ATTR_FATTR_FSID;
3060         }
3061         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3062                         (unsigned long long)fsid->major,
3063                         (unsigned long long)fsid->minor);
3064         return ret;
3065 out_overflow:
3066         print_overflow_msg(__func__, xdr);
3067         return -EIO;
3068 }
3069
3070 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3071 {
3072         __be32 *p;
3073
3074         *res = 60;
3075         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3076                 return -EIO;
3077         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3078                 p = xdr_inline_decode(xdr, 4);
3079                 if (unlikely(!p))
3080                         goto out_overflow;
3081                 *res = be32_to_cpup(p);
3082                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3083         }
3084         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3085         return 0;
3086 out_overflow:
3087         print_overflow_msg(__func__, xdr);
3088         return -EIO;
3089 }
3090
3091 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap)
3092 {
3093         __be32 *p;
3094
3095         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3096                 return -EIO;
3097         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3098                 p = xdr_inline_decode(xdr, 4);
3099                 if (unlikely(!p))
3100                         goto out_overflow;
3101                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3102                 return -be32_to_cpup(p);
3103         }
3104         return 0;
3105 out_overflow:
3106         print_overflow_msg(__func__, xdr);
3107         return -EIO;
3108 }
3109
3110 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3111 {
3112         __be32 *p;
3113         int len;
3114
3115         if (fh != NULL)
3116                 memset(fh, 0, sizeof(*fh));
3117
3118         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3119                 return -EIO;
3120         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3121                 p = xdr_inline_decode(xdr, 4);
3122                 if (unlikely(!p))
3123                         goto out_overflow;
3124                 len = be32_to_cpup(p);
3125                 if (len > NFS4_FHSIZE)
3126                         return -EIO;
3127                 p = xdr_inline_decode(xdr, len);
3128                 if (unlikely(!p))
3129                         goto out_overflow;
3130                 if (fh != NULL) {
3131                         memcpy(fh->data, p, len);
3132                         fh->size = len;
3133                 }
3134                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3135         }
3136         return 0;
3137 out_overflow:
3138         print_overflow_msg(__func__, xdr);
3139         return -EIO;
3140 }
3141
3142 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3143 {
3144         __be32 *p;
3145
3146         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
3147         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3148                 return -EIO;
3149         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3150                 p = xdr_inline_decode(xdr, 4);
3151                 if (unlikely(!p))
3152                         goto out_overflow;
3153                 *res = be32_to_cpup(p);
3154                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3155         }
3156         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3157         return 0;
3158 out_overflow:
3159         print_overflow_msg(__func__, xdr);
3160         return -EIO;
3161 }
3162
3163 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3164 {
3165         __be32 *p;
3166         int ret = 0;
3167
3168         *fileid = 0;
3169         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3170                 return -EIO;
3171         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3172                 p = xdr_inline_decode(xdr, 8);
3173                 if (unlikely(!p))
3174                         goto out_overflow;
3175                 xdr_decode_hyper(p, fileid);
3176                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3177                 ret = NFS_ATTR_FATTR_FILEID;
3178         }
3179         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3180         return ret;
3181 out_overflow:
3182         print_overflow_msg(__func__, xdr);
3183         return -EIO;
3184 }
3185
3186 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3187 {
3188         __be32 *p;
3189         int ret = 0;
3190
3191         *fileid = 0;
3192         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3193                 return -EIO;
3194         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3195                 p = xdr_inline_decode(xdr, 8);
3196                 if (unlikely(!p))
3197                         goto out_overflow;
3198                 xdr_decode_hyper(p, fileid);
3199                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3200                 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3201         }
3202         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3203         return ret;
3204 out_overflow:
3205         print_overflow_msg(__func__, xdr);
3206         return -EIO;
3207 }
3208
3209 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3210 {
3211         __be32 *p;
3212         int status = 0;
3213
3214         *res = 0;
3215         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3216                 return -EIO;
3217         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3218                 p = xdr_inline_decode(xdr, 8);
3219                 if (unlikely(!p))
3220                         goto out_overflow;
3221                 xdr_decode_hyper(p, res);
3222                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3223         }
3224         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3225         return status;
3226 out_overflow:
3227         print_overflow_msg(__func__, xdr);
3228         return -EIO;
3229 }
3230
3231 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3232 {
3233         __be32 *p;
3234         int status = 0;
3235
3236         *res = 0;
3237         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3238                 return -EIO;
3239         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3240                 p = xdr_inline_decode(xdr, 8);
3241                 if (unlikely(!p))
3242                         goto out_overflow;
3243                 xdr_decode_hyper(p, res);
3244                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3245         }
3246         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3247         return status;
3248 out_overflow:
3249         print_overflow_msg(__func__, xdr);
3250         return -EIO;
3251 }
3252
3253 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3254 {
3255         __be32 *p;
3256         int status = 0;
3257
3258         *res = 0;
3259         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3260                 return -EIO;
3261         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3262                 p = xdr_inline_decode(xdr, 8);
3263                 if (unlikely(!p))
3264                         goto out_overflow;
3265                 xdr_decode_hyper(p, res);
3266                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3267         }
3268         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3269         return status;
3270 out_overflow:
3271         print_overflow_msg(__func__, xdr);
3272         return -EIO;
3273 }
3274
3275 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3276 {
3277         u32 n;
3278         __be32 *p;
3279         int status = 0;
3280
3281         p = xdr_inline_decode(xdr, 4);
3282         if (unlikely(!p))
3283                 goto out_overflow;
3284         n = be32_to_cpup(p);
3285         if (n == 0)
3286                 goto root_path;
3287         dprintk("path ");
3288         path->ncomponents = 0;
3289         while (path->ncomponents < n) {
3290                 struct nfs4_string *component = &path->components[path->ncomponents];
3291                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3292                 if (unlikely(status != 0))
3293                         goto out_eio;
3294                 if (path->ncomponents != n)
3295                         dprintk("/");
3296                 dprintk("%s", component->data);
3297                 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
3298                         path->ncomponents++;
3299                 else {
3300                         dprintk("cannot parse %d components in path\n", n);
3301                         goto out_eio;
3302                 }
3303         }
3304 out:
3305         dprintk("\n");
3306         return status;
3307 root_path:
3308 /* a root pathname is sent as a zero component4 */
3309         path->ncomponents = 1;
3310         path->components[0].len=0;
3311         path->components[0].data=NULL;
3312         dprintk("path /\n");
3313         goto out;
3314 out_eio:
3315         dprintk(" status %d", status);
3316         status = -EIO;
3317         goto out;
3318 out_overflow:
3319         print_overflow_msg(__func__, xdr);
3320         return -EIO;
3321 }
3322
3323 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3324 {
3325         int n;
3326         __be32 *p;
3327         int status = -EIO;
3328
3329         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3330                 goto out;
3331         status = 0;
3332         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3333                 goto out;
3334         dprintk("%s: fsroot ", __func__);
3335         status = decode_pathname(xdr, &res->fs_path);
3336         if (unlikely(status != 0))
3337                 goto out;
3338         p = xdr_inline_decode(xdr, 4);
3339         if (unlikely(!p))
3340                 goto out_overflow;
3341         n = be32_to_cpup(p);
3342         if (n <= 0)
3343                 goto out_eio;
3344         res->nlocations = 0;
3345         while (res->nlocations < n) {
3346                 u32 m;
3347                 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
3348
3349                 p = xdr_inline_decode(xdr, 4);
3350                 if (unlikely(!p))
3351                         goto out_overflow;
3352                 m = be32_to_cpup(p);
3353
3354                 loc->nservers = 0;
3355                 dprintk("%s: servers ", __func__);
3356                 while (loc->nservers < m) {
3357                         struct nfs4_string *server = &loc->servers[loc->nservers];
3358                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3359                         if (unlikely(status != 0))
3360                                 goto out_eio;
3361                         dprintk("%s ", server->data);
3362                         if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
3363                                 loc->nservers++;
3364                         else {
3365                                 unsigned int i;
3366                                 dprintk("%s: using first %u of %u servers "
3367                                         "returned for location %u\n",
3368                                                 __func__,
3369                                                 NFS4_FS_LOCATION_MAXSERVERS,
3370                                                 m, res->nlocations);
3371                                 for (i = loc->nservers; i < m; i++) {
3372                                         unsigned int len;
3373                                         char *data;
3374                                         status = decode_opaque_inline(xdr, &len, &data);
3375                                         if (unlikely(status != 0))
3376                                                 goto out_eio;
3377                                 }
3378                         }
3379                 }
3380                 status = decode_pathname(xdr, &loc->rootpath);
3381                 if (unlikely(status != 0))
3382                         goto out_eio;
3383                 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
3384                         res->nlocations++;
3385         }
3386         if (res->nlocations != 0)
3387                 status = NFS_ATTR_FATTR_V4_REFERRAL;
3388 out:
3389         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3390         return status;
3391 out_overflow:
3392         print_overflow_msg(__func__, xdr);
3393 out_eio:
3394         status = -EIO;
3395         goto out;
3396 }
3397
3398 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3399 {
3400         __be32 *p;
3401         int status = 0;
3402
3403         *res = 0;
3404         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3405                 return -EIO;
3406         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3407                 p = xdr_inline_decode(xdr, 8);
3408                 if (unlikely(!p))
3409                         goto out_overflow;
3410                 xdr_decode_hyper(p, res);
3411                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3412         }
3413         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3414         return status;
3415 out_overflow:
3416         print_overflow_msg(__func__, xdr);
3417         return -EIO;
3418 }
3419
3420 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3421 {
3422         __be32 *p;
3423         int status = 0;
3424
3425         *maxlink = 1;
3426         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3427                 return -EIO;
3428         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3429                 p = xdr_inline_decode(xdr, 4);
3430                 if (unlikely(!p))
3431                         goto out_overflow;
3432                 *maxlink = be32_to_cpup(p);
3433                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3434         }
3435         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3436         return status;
3437 out_overflow:
3438         print_overflow_msg(__func__, xdr);
3439         return -EIO;
3440 }
3441
3442 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3443 {
3444         __be32 *p;
3445         int status = 0;
3446
3447         *maxname = 1024;
3448         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3449                 return -EIO;
3450         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3451                 p = xdr_inline_decode(xdr, 4);
3452                 if (unlikely(!p))
3453                         goto out_overflow;
3454                 *maxname = be32_to_cpup(p);
3455                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3456         }
3457         dprintk("%s: maxname=%u\n", __func__, *maxname);
3458         return status;
3459 out_overflow:
3460         print_overflow_msg(__func__, xdr);
3461         return -EIO;
3462 }
3463
3464 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3465 {
3466         __be32 *p;
3467         int status = 0;
3468
3469         *res = 1024;
3470         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3471                 return -EIO;
3472         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3473                 uint64_t maxread;
3474                 p = xdr_inline_decode(xdr, 8);
3475                 if (unlikely(!p))
3476                         goto out_overflow;
3477                 xdr_decode_hyper(p, &maxread);
3478                 if (maxread > 0x7FFFFFFF)
3479                         maxread = 0x7FFFFFFF;
3480                 *res = (uint32_t)maxread;
3481                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3482         }
3483         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3484         return status;
3485 out_overflow:
3486         print_overflow_msg(__func__, xdr);
3487         return -EIO;
3488 }
3489
3490 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3491 {
3492         __be32 *p;
3493         int status = 0;
3494
3495         *res = 1024;
3496         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3497                 return -EIO;
3498         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3499                 uint64_t maxwrite;
3500                 p = xdr_inline_decode(xdr, 8);
3501                 if (unlikely(!p))
3502                         goto out_overflow;
3503                 xdr_decode_hyper(p, &maxwrite);
3504                 if (maxwrite > 0x7FFFFFFF)
3505                         maxwrite = 0x7FFFFFFF;
3506                 *res = (uint32_t)maxwrite;
3507                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3508         }
3509         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3510         return status;
3511 out_overflow:
3512         print_overflow_msg(__func__, xdr);
3513         return -EIO;
3514 }
3515
3516 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3517 {
3518         uint32_t tmp;
3519         __be32 *p;
3520         int ret = 0;
3521
3522         *mode = 0;
3523         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3524                 return -EIO;
3525         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3526                 p = xdr_inline_decode(xdr, 4);
3527                 if (unlikely(!p))
3528                         goto out_overflow;
3529                 tmp = be32_to_cpup(p);
3530                 *mode = tmp & ~S_IFMT;
3531                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3532                 ret = NFS_ATTR_FATTR_MODE;
3533         }
3534         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3535         return ret;
3536 out_overflow:
3537         print_overflow_msg(__func__, xdr);
3538         return -EIO;
3539 }
3540
3541 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3542 {
3543         __be32 *p;
3544         int ret = 0;
3545
3546         *nlink = 1;
3547         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3548                 return -EIO;
3549         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3550                 p = xdr_inline_decode(xdr, 4);
3551                 if (unlikely(!p))
3552                         goto out_overflow;
3553                 *nlink = be32_to_cpup(p);
3554                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3555                 ret = NFS_ATTR_FATTR_NLINK;
3556         }
3557         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3558         return ret;
3559 out_overflow:
3560         print_overflow_msg(__func__, xdr);
3561         return -EIO;
3562 }
3563
3564 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3565                 const struct nfs_server *server, uint32_t *uid, int may_sleep)
3566 {
3567         uint32_t len;
3568         __be32 *p;
3569         int ret = 0;
3570
3571         *uid = -2;
3572         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3573                 return -EIO;
3574         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3575                 p = xdr_inline_decode(xdr, 4);
3576                 if (unlikely(!p))
3577                         goto out_overflow;
3578                 len = be32_to_cpup(p);
3579                 p = xdr_inline_decode(xdr, len);
3580                 if (unlikely(!p))
3581                         goto out_overflow;
3582                 if (!may_sleep) {
3583                         /* do nothing */
3584                 } else if (len < XDR_MAX_NETOBJ) {
3585                         if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3586                                 ret = NFS_ATTR_FATTR_OWNER;
3587                         else
3588                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3589                                                 __func__);
3590                 } else
3591                         dprintk("%s: name too long (%u)!\n",
3592                                         __func__, len);
3593                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3594         }
3595         dprintk("%s: uid=%d\n", __func__, (int)*uid);
3596         return ret;
3597 out_overflow:
3598         print_overflow_msg(__func__, xdr);
3599         return -EIO;
3600 }
3601
3602 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3603                 const struct nfs_server *server, uint32_t *gid, int may_sleep)
3604 {
3605         uint32_t len;
3606         __be32 *p;
3607         int ret = 0;
3608
3609         *gid = -2;
3610         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3611                 return -EIO;
3612         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3613                 p = xdr_inline_decode(xdr, 4);
3614                 if (unlikely(!p))
3615                         goto out_overflow;
3616                 len = be32_to_cpup(p);
3617                 p = xdr_inline_decode(xdr, len);
3618                 if (unlikely(!p))
3619                         goto out_overflow;
3620                 if (!may_sleep) {
3621                         /* do nothing */
3622                 } else if (len < XDR_MAX_NETOBJ) {
3623                         if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3624                                 ret = NFS_ATTR_FATTR_GROUP;
3625                         else
3626                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3627                                                 __func__);
3628                 } else
3629                         dprintk("%s: name too long (%u)!\n",
3630                                         __func__, len);
3631                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3632         }
3633         dprintk("%s: gid=%d\n", __func__, (int)*gid);
3634         return ret;
3635 out_overflow:
3636         print_overflow_msg(__func__, xdr);
3637         return -EIO;
3638 }
3639
3640 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3641 {
3642         uint32_t major = 0, minor = 0;
3643         __be32 *p;
3644         int ret = 0;
3645
3646         *rdev = MKDEV(0,0);
3647         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3648                 return -EIO;
3649         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3650                 dev_t tmp;
3651
3652                 p = xdr_inline_decode(xdr, 8);
3653                 if (unlikely(!p))
3654                         goto out_overflow;
3655                 major = be32_to_cpup(p++);
3656                 minor = be32_to_cpup(p);
3657                 tmp = MKDEV(major, minor);
3658                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3659                         *rdev = tmp;
3660                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3661                 ret = NFS_ATTR_FATTR_RDEV;
3662         }
3663         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3664         return ret;
3665 out_overflow:
3666         print_overflow_msg(__func__, xdr);
3667         return -EIO;
3668 }
3669
3670 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3671 {
3672         __be32 *p;
3673         int status = 0;
3674
3675         *res = 0;
3676         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3677                 return -EIO;
3678         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3679                 p = xdr_inline_decode(xdr, 8);
3680                 if (unlikely(!p))
3681                         goto out_overflow;
3682                 xdr_decode_hyper(p, res);
3683                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3684         }
3685         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3686         return status;
3687 out_overflow:
3688         print_overflow_msg(__func__, xdr);
3689         return -EIO;
3690 }
3691
3692 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3693 {
3694         __be32 *p;
3695         int status = 0;
3696
3697         *res = 0;
3698         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3699                 return -EIO;
3700         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3701                 p = xdr_inline_decode(xdr, 8);
3702                 if (unlikely(!p))
3703                         goto out_overflow;
3704                 xdr_decode_hyper(p, res);
3705                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3706         }
3707         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3708         return status;
3709 out_overflow:
3710         print_overflow_msg(__func__, xdr);
3711         return -EIO;
3712 }
3713
3714 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3715 {
3716         __be32 *p;
3717         int status = 0;
3718
3719         *res = 0;
3720         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3721                 return -EIO;
3722         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3723                 p = xdr_inline_decode(xdr, 8);
3724                 if (unlikely(!p))
3725                         goto out_overflow;
3726                 xdr_decode_hyper(p, res);
3727                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3728         }
3729         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3730         return status;
3731 out_overflow:
3732         print_overflow_msg(__func__, xdr);
3733         return -EIO;
3734 }
3735
3736 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3737 {
3738         __be32 *p;
3739         int ret = 0;
3740
3741         *used = 0;
3742         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3743                 return -EIO;
3744         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3745                 p = xdr_inline_decode(xdr, 8);
3746                 if (unlikely(!p))
3747                         goto out_overflow;
3748                 xdr_decode_hyper(p, used);
3749                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3750                 ret = NFS_ATTR_FATTR_SPACE_USED;
3751         }
3752         dprintk("%s: space used=%Lu\n", __func__,
3753                         (unsigned long long)*used);
3754         return ret;
3755 out_overflow:
3756         print_overflow_msg(__func__, xdr);
3757         return -EIO;
3758 }
3759
3760 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
3761 {
3762         __be32 *p;
3763         uint64_t sec;
3764         uint32_t nsec;
3765
3766         p = xdr_inline_decode(xdr, 12);
3767         if (unlikely(!p))
3768                 goto out_overflow;
3769         p = xdr_decode_hyper(p, &sec);
3770         nsec = be32_to_cpup(p);
3771         time->tv_sec = (time_t)sec;
3772         time->tv_nsec = (long)nsec;
3773         return 0;
3774 out_overflow:
3775         print_overflow_msg(__func__, xdr);
3776         return -EIO;
3777 }
3778
3779 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3780 {
3781         int status = 0;
3782
3783         time->tv_sec = 0;
3784         time->tv_nsec = 0;
3785         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
3786                 return -EIO;
3787         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
3788                 status = decode_attr_time(xdr, time);
3789                 if (status == 0)
3790                         status = NFS_ATTR_FATTR_ATIME;
3791                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
3792         }
3793         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
3794         return status;
3795 }
3796
3797 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3798 {
3799         int status = 0;
3800
3801         time->tv_sec = 0;
3802         time->tv_nsec = 0;
3803         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
3804                 return -EIO;
3805         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
3806                 status = decode_attr_time(xdr, time);
3807                 if (status == 0)
3808                         status = NFS_ATTR_FATTR_CTIME;
3809                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
3810         }
3811         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
3812         return status;
3813 }
3814
3815 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
3816                                   struct timespec *time)
3817 {
3818         int status = 0;
3819
3820         time->tv_sec = 0;
3821         time->tv_nsec = 0;
3822         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
3823                 return -EIO;
3824         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
3825                 status = decode_attr_time(xdr, time);
3826                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
3827         }
3828         dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
3829                 (long)time->tv_nsec);
3830         return status;
3831 }
3832
3833 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3834 {
3835         int status = 0;
3836
3837         time->tv_sec = 0;
3838         time->tv_nsec = 0;
3839         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
3840                 return -EIO;
3841         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
3842                 status = decode_attr_time(xdr, time);
3843                 if (status == 0)
3844                         status = NFS_ATTR_FATTR_MTIME;
3845                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
3846         }
3847         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
3848         return status;
3849 }
3850
3851 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
3852 {
3853         unsigned int attrwords = XDR_QUADLEN(attrlen);
3854         unsigned int nwords = xdr->p - savep;
3855
3856         if (unlikely(attrwords != nwords)) {
3857                 dprintk("%s: server returned incorrect attribute length: "
3858                         "%u %c %u\n",
3859                                 __func__,
3860                                 attrwords << 2,
3861                                 (attrwords < nwords) ? '<' : '>',
3862                                 nwords << 2);
3863                 return -EIO;
3864         }
3865         return 0;
3866 }
3867
3868 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3869 {
3870         __be32 *p;
3871
3872         p = xdr_inline_decode(xdr, 20);
3873         if (unlikely(!p))
3874                 goto out_overflow;
3875         cinfo->atomic = be32_to_cpup(p++);
3876         p = xdr_decode_hyper(p, &cinfo->before);
3877         xdr_decode_hyper(p, &cinfo->after);
3878         return 0;
3879 out_overflow:
3880         print_overflow_msg(__func__, xdr);
3881         return -EIO;
3882 }
3883
3884 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
3885 {
3886         __be32 *p;
3887         uint32_t supp, acc;
3888         int status;
3889
3890         status = decode_op_hdr(xdr, OP_ACCESS);
3891         if (status)
3892                 return status;
3893         p = xdr_inline_decode(xdr, 8);
3894         if (unlikely(!p))
3895                 goto out_overflow;
3896         supp = be32_to_cpup(p++);
3897         acc = be32_to_cpup(p);
3898         access->supported = supp;
3899         access->access = acc;
3900         return 0;
3901 out_overflow:
3902         print_overflow_msg(__func__, xdr);
3903         return -EIO;
3904 }
3905
3906 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
3907 {
3908         __be32 *p;
3909
3910         p = xdr_inline_decode(xdr, len);
3911         if (likely(p)) {
3912                 memcpy(buf, p, len);
3913                 return 0;
3914         }
3915         print_overflow_msg(__func__, xdr);
3916         return -EIO;
3917 }
3918
3919 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
3920 {
3921         return decode_opaque_fixed(xdr, stateid->data, NFS4_STATEID_SIZE);
3922 }
3923
3924 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
3925 {
3926         int status;
3927
3928         status = decode_op_hdr(xdr, OP_CLOSE);
3929         if (status != -EIO)
3930                 nfs_increment_open_seqid(status, res->seqid);
3931         if (!status)
3932                 status = decode_stateid(xdr, &res->stateid);
3933         return status;
3934 }
3935
3936 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
3937 {
3938         return decode_opaque_fixed(xdr, verifier, 8);
3939 }
3940
3941 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
3942 {
3943         int status;
3944
3945         status = decode_op_hdr(xdr, OP_COMMIT);
3946         if (!status)
3947                 status = decode_verifier(xdr, res->verf->verifier);
3948         return status;
3949 }
3950
3951 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3952 {
3953         __be32 *p;
3954         uint32_t bmlen;
3955         int status;
3956
3957         status = decode_op_hdr(xdr, OP_CREATE);
3958         if (status)
3959                 return status;
3960         if ((status = decode_change_info(xdr, cinfo)))
3961                 return status;
3962         p = xdr_inline_decode(xdr, 4);
3963         if (unlikely(!p))
3964                 goto out_overflow;
3965         bmlen = be32_to_cpup(p);
3966         p = xdr_inline_decode(xdr, bmlen << 2);
3967         if (likely(p))
3968                 return 0;
3969 out_overflow:
3970         print_overflow_msg(__func__, xdr);
3971         return -EIO;
3972 }
3973
3974 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
3975 {
3976         __be32 *savep;
3977         uint32_t attrlen, bitmap[2] = {0};
3978         int status;
3979
3980         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3981                 goto xdr_error;
3982         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3983                 goto xdr_error;
3984         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3985                 goto xdr_error;
3986         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
3987                 goto xdr_error;
3988         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
3989                 goto xdr_error;
3990         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
3991                 goto xdr_error;
3992         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
3993                 goto xdr_error;
3994         status = verify_attr_len(xdr, savep, attrlen);
3995 xdr_error:
3996         dprintk("%s: xdr returned %d!\n", __func__, -status);
3997         return status;
3998 }
3999
4000 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4001 {
4002         __be32 *savep;
4003         uint32_t attrlen, bitmap[2] = {0};
4004         int status;
4005
4006         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4007                 goto xdr_error;
4008         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4009                 goto xdr_error;
4010         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4011                 goto xdr_error;
4012
4013         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4014                 goto xdr_error;
4015         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4016                 goto xdr_error;
4017         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4018                 goto xdr_error;
4019         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4020                 goto xdr_error;
4021         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4022                 goto xdr_error;
4023         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4024                 goto xdr_error;
4025
4026         status = verify_attr_len(xdr, savep, attrlen);
4027 xdr_error:
4028         dprintk("%s: xdr returned %d!\n", __func__, -status);
4029         return status;
4030 }
4031
4032 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4033 {
4034         __be32 *savep;
4035         uint32_t attrlen, bitmap[2] = {0};
4036         int status;
4037
4038         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4039                 goto xdr_error;
4040         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4041                 goto xdr_error;
4042         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4043                 goto xdr_error;
4044
4045         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4046                 goto xdr_error;
4047         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4048                 goto xdr_error;
4049
4050         status = verify_attr_len(xdr, savep, attrlen);
4051 xdr_error:
4052         dprintk("%s: xdr returned %d!\n", __func__, -status);
4053         return status;
4054 }
4055
4056 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4057                 struct nfs_fattr *fattr, struct nfs_fh *fh,
4058                 const struct nfs_server *server, int may_sleep)
4059 {
4060         int status;
4061         umode_t fmode = 0;
4062         uint32_t type;
4063
4064         status = decode_attr_type(xdr, bitmap, &type);
4065         if (status < 0)
4066                 goto xdr_error;
4067         fattr->mode = 0;
4068         if (status != 0) {
4069                 fattr->mode |= nfs_type2fmt[type];
4070                 fattr->valid |= status;
4071         }
4072
4073         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4074         if (status < 0)
4075                 goto xdr_error;
4076         fattr->valid |= status;
4077
4078         status = decode_attr_size(xdr, bitmap, &fattr->size);
4079         if (status < 0)
4080                 goto xdr_error;
4081         fattr->valid |= status;
4082
4083         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4084         if (status < 0)
4085                 goto xdr_error;
4086         fattr->valid |= status;
4087
4088         status = decode_attr_error(xdr, bitmap);
4089         if (status == -NFS4ERR_WRONGSEC) {
4090                 nfs_fixup_secinfo_attributes(fattr, fh);
4091                 status = 0;
4092         }
4093         if (status < 0)
4094                 goto xdr_error;
4095
4096         status = decode_attr_filehandle(xdr, bitmap, fh);
4097         if (status < 0)
4098                 goto xdr_error;
4099
4100         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4101         if (status < 0)
4102                 goto xdr_error;
4103         fattr->valid |= status;
4104
4105         status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
4106                                                 struct nfs4_fs_locations,
4107                                                 fattr));
4108         if (status < 0)
4109                 goto xdr_error;
4110         fattr->valid |= status;
4111
4112         status = decode_attr_mode(xdr, bitmap, &fmode);
4113         if (status < 0)
4114                 goto xdr_error;
4115         if (status != 0) {
4116                 fattr->mode |= fmode;
4117                 fattr->valid |= status;
4118         }
4119
4120         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4121         if (status < 0)
4122                 goto xdr_error;
4123         fattr->valid |= status;
4124
4125         status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, may_sleep);
4126         if (status < 0)
4127                 goto xdr_error;
4128         fattr->valid |= status;
4129
4130         status = decode_attr_group(xdr, bitmap, server, &fattr->gid, may_sleep);
4131         if (status < 0)
4132                 goto xdr_error;
4133         fattr->valid |= status;
4134
4135         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4136         if (status < 0)
4137                 goto xdr_error;
4138         fattr->valid |= status;
4139
4140         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4141         if (status < 0)
4142                 goto xdr_error;
4143         fattr->valid |= status;
4144
4145         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4146         if (status < 0)
4147                 goto xdr_error;
4148         fattr->valid |= status;
4149
4150         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4151         if (status < 0)
4152                 goto xdr_error;
4153         fattr->valid |= status;
4154
4155         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4156         if (status < 0)
4157                 goto xdr_error;
4158         fattr->valid |= status;
4159
4160         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4161         if (status < 0)
4162                 goto xdr_error;
4163         fattr->valid |= status;
4164
4165 xdr_error:
4166         dprintk("%s: xdr returned %d\n", __func__, -status);
4167         return status;
4168 }
4169
4170 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4171                 struct nfs_fh *fh, const struct nfs_server *server, int may_sleep)
4172 {
4173         __be32 *savep;
4174         uint32_t attrlen,
4175                  bitmap[2] = {0};
4176         int status;
4177
4178         status = decode_op_hdr(xdr, OP_GETATTR);
4179         if (status < 0)
4180                 goto xdr_error;
4181
4182         status = decode_attr_bitmap(xdr, bitmap);
4183         if (status < 0)
4184                 goto xdr_error;
4185
4186         status = decode_attr_length(xdr, &attrlen, &savep);
4187         if (status < 0)
4188                 goto xdr_error;
4189
4190         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, server, may_sleep);
4191         if (status < 0)
4192                 goto xdr_error;
4193
4194         status = verify_attr_len(xdr, savep, attrlen);
4195 xdr_error:
4196         dprintk("%s: xdr returned %d\n", __func__, -status);
4197         return status;
4198 }
4199
4200 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4201                 const struct nfs_server *server, int may_sleep)
4202 {
4203         return decode_getfattr_generic(xdr, fattr, NULL, server, may_sleep);
4204 }
4205
4206 /*
4207  * Decode potentially multiple layout types. Currently we only support
4208  * one layout driver per file system.
4209  */
4210 static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4211                                          uint32_t *layouttype)
4212 {
4213         uint32_t *p;
4214         int num;
4215
4216         p = xdr_inline_decode(xdr, 4);
4217         if (unlikely(!p))
4218                 goto out_overflow;
4219         num = be32_to_cpup(p);
4220
4221         /* pNFS is not supported by the underlying file system */
4222         if (num == 0) {
4223                 *layouttype = 0;
4224                 return 0;
4225         }
4226         if (num > 1)
4227                 printk(KERN_INFO "%s: Warning: Multiple pNFS layout drivers "
4228                         "per filesystem not supported\n", __func__);
4229
4230         /* Decode and set first layout type, move xdr->p past unused types */
4231         p = xdr_inline_decode(xdr, num * 4);
4232         if (unlikely(!p))
4233                 goto out_overflow;
4234         *layouttype = be32_to_cpup(p);
4235         return 0;
4236 out_overflow:
4237         print_overflow_msg(__func__, xdr);
4238         return -EIO;
4239 }
4240
4241 /*
4242  * The type of file system exported.
4243  * Note we must ensure that layouttype is set in any non-error case.
4244  */
4245 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4246                                 uint32_t *layouttype)
4247 {
4248         int status = 0;
4249
4250         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4251         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4252                 return -EIO;
4253         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4254                 status = decode_first_pnfs_layout_type(xdr, layouttype);
4255                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4256         } else
4257                 *layouttype = 0;
4258         return status;
4259 }
4260
4261 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4262 {
4263         __be32 *savep;
4264         uint32_t attrlen, bitmap[2];
4265         int status;
4266
4267         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4268                 goto xdr_error;
4269         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4270                 goto xdr_error;
4271         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4272                 goto xdr_error;
4273
4274         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4275
4276         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4277                 goto xdr_error;
4278         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4279                 goto xdr_error;
4280         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4281                 goto xdr_error;
4282         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4283         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4284                 goto xdr_error;
4285         fsinfo->wtpref = fsinfo->wtmax;
4286         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4287         if (status != 0)
4288                 goto xdr_error;
4289         status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4290         if (status != 0)
4291                 goto xdr_error;
4292
4293         status = verify_attr_len(xdr, savep, attrlen);
4294 xdr_error:
4295         dprintk("%s: xdr returned %d!\n", __func__, -status);
4296         return status;
4297 }
4298
4299 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4300 {
4301         __be32 *p;
4302         uint32_t len;
4303         int status;
4304
4305         /* Zero handle first to allow comparisons */
4306         memset(fh, 0, sizeof(*fh));
4307
4308         status = decode_op_hdr(xdr, OP_GETFH);
4309         if (status)
4310                 return status;
4311
4312         p = xdr_inline_decode(xdr, 4);
4313         if (unlikely(!p))
4314                 goto out_overflow;
4315         len = be32_to_cpup(p);
4316         if (len > NFS4_FHSIZE)
4317                 return -EIO;
4318         fh->size = len;
4319         p = xdr_inline_decode(xdr, len);
4320         if (unlikely(!p))
4321                 goto out_overflow;
4322         memcpy(fh->data, p, len);
4323         return 0;
4324 out_overflow:
4325         print_overflow_msg(__func__, xdr);
4326         return -EIO;
4327 }
4328
4329 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4330 {
4331         int status;
4332
4333         status = decode_op_hdr(xdr, OP_LINK);
4334         if (status)
4335                 return status;
4336         return decode_change_info(xdr, cinfo);
4337 }
4338
4339 /*
4340  * We create the owner, so we know a proper owner.id length is 4.
4341  */
4342 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4343 {
4344         uint64_t offset, length, clientid;
4345         __be32 *p;
4346         uint32_t namelen, type;
4347
4348         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4349         if (unlikely(!p))
4350                 goto out_overflow;
4351         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4352         p = xdr_decode_hyper(p, &length);
4353         type = be32_to_cpup(p++); /* 4 byte read */
4354         if (fl != NULL) { /* manipulate file lock */
4355                 fl->fl_start = (loff_t)offset;
4356                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4357                 if (length == ~(uint64_t)0)
4358                         fl->fl_end = OFFSET_MAX;
4359                 fl->fl_type = F_WRLCK;
4360                 if (type & 1)
4361                         fl->fl_type = F_RDLCK;
4362                 fl->fl_pid = 0;
4363         }
4364         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4365         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4366         p = xdr_inline_decode(xdr, namelen); /* variable size field */
4367         if (likely(p))
4368                 return -NFS4ERR_DENIED;
4369 out_overflow:
4370         print_overflow_msg(__func__, xdr);
4371         return -EIO;
4372 }
4373
4374 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4375 {
4376         int status;
4377
4378         status = decode_op_hdr(xdr, OP_LOCK);
4379         if (status == -EIO)
4380                 goto out;
4381         if (status == 0) {
4382                 status = decode_stateid(xdr, &res->stateid);
4383                 if (unlikely(status))
4384                         goto out;
4385         } else if (status == -NFS4ERR_DENIED)
4386                 status = decode_lock_denied(xdr, NULL);
4387         if (res->open_seqid != NULL)
4388                 nfs_increment_open_seqid(status, res->open_seqid);
4389         nfs_increment_lock_seqid(status, res->lock_seqid);
4390 out:
4391         return status;
4392 }
4393
4394 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4395 {
4396         int status;
4397         status = decode_op_hdr(xdr, OP_LOCKT);
4398         if (status == -NFS4ERR_DENIED)
4399                 return decode_lock_denied(xdr, res->denied);
4400         return status;
4401 }
4402
4403 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4404 {
4405         int status;
4406
4407         status = decode_op_hdr(xdr, OP_LOCKU);
4408         if (status != -EIO)
4409                 nfs_increment_lock_seqid(status, res->seqid);
4410         if (status == 0)
4411                 status = decode_stateid(xdr, &res->stateid);
4412         return status;
4413 }
4414
4415 static int decode_release_lockowner(struct xdr_stream *xdr)
4416 {
4417         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4418 }
4419
4420 static int decode_lookup(struct xdr_stream *xdr)
4421 {
4422         return decode_op_hdr(xdr, OP_LOOKUP);
4423 }
4424
4425 /* This is too sick! */
4426 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4427 {
4428         __be32 *p;
4429         uint32_t limit_type, nblocks, blocksize;
4430
4431         p = xdr_inline_decode(xdr, 12);
4432         if (unlikely(!p))
4433                 goto out_overflow;
4434         limit_type = be32_to_cpup(p++);
4435         switch (limit_type) {
4436         case 1:
4437                 xdr_decode_hyper(p, maxsize);
4438                 break;
4439         case 2:
4440                 nblocks = be32_to_cpup(p++);
4441                 blocksize = be32_to_cpup(p);
4442                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4443         }
4444         return 0;
4445 out_overflow:
4446         print_overflow_msg(__func__, xdr);
4447         return -EIO;
4448 }
4449
4450 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4451 {
4452         __be32 *p;
4453         uint32_t delegation_type;
4454         int status;
4455
4456         p = xdr_inline_decode(xdr, 4);
4457         if (unlikely(!p))
4458                 goto out_overflow;
4459         delegation_type = be32_to_cpup(p);
4460         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4461                 res->delegation_type = 0;
4462                 return 0;
4463         }
4464         status = decode_stateid(xdr, &res->delegation);
4465         if (unlikely(status))
4466                 return status;
4467         p = xdr_inline_decode(xdr, 4);
4468         if (unlikely(!p))
4469                 goto out_overflow;
4470         res->do_recall = be32_to_cpup(p);
4471
4472         switch (delegation_type) {
4473         case NFS4_OPEN_DELEGATE_READ:
4474                 res->delegation_type = FMODE_READ;
4475                 break;
4476         case NFS4_OPEN_DELEGATE_WRITE:
4477                 res->delegation_type = FMODE_WRITE|FMODE_READ;
4478                 if (decode_space_limit(xdr, &res->maxsize) < 0)
4479                                 return -EIO;
4480         }
4481         return decode_ace(xdr, NULL, res->server->nfs_client);
4482 out_overflow:
4483         print_overflow_msg(__func__, xdr);
4484         return -EIO;
4485 }
4486
4487 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
4488 {
4489         __be32 *p;
4490         uint32_t savewords, bmlen, i;
4491         int status;
4492
4493         status = decode_op_hdr(xdr, OP_OPEN);
4494         if (status != -EIO)
4495                 nfs_increment_open_seqid(status, res->seqid);
4496         if (!status)
4497                 status = decode_stateid(xdr, &res->stateid);
4498         if (unlikely(status))
4499                 return status;
4500
4501         decode_change_info(xdr, &res->cinfo);
4502
4503         p = xdr_inline_decode(xdr, 8);
4504         if (unlikely(!p))
4505                 goto out_overflow;
4506         res->rflags = be32_to_cpup(p++);
4507         bmlen = be32_to_cpup(p);
4508         if (bmlen > 10)
4509                 goto xdr_error;
4510
4511         p = xdr_inline_decode(xdr, bmlen << 2);
4512         if (unlikely(!p))
4513                 goto out_overflow;
4514         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
4515         for (i = 0; i < savewords; ++i)
4516                 res->attrset[i] = be32_to_cpup(p++);
4517         for (; i < NFS4_BITMAP_SIZE; i++)
4518                 res->attrset[i] = 0;
4519
4520         return decode_delegation(xdr, res);
4521 xdr_error:
4522         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
4523         return -EIO;
4524 out_overflow:
4525         print_overflow_msg(__func__, xdr);
4526         return -EIO;
4527 }
4528
4529 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
4530 {
4531         int status;
4532
4533         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
4534         if (status != -EIO)
4535                 nfs_increment_open_seqid(status, res->seqid);
4536         if (!status)
4537                 status = decode_stateid(xdr, &res->stateid);
4538         return status;
4539 }
4540
4541 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
4542 {
4543         int status;
4544
4545         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
4546         if (status != -EIO)
4547                 nfs_increment_open_seqid(status, res->seqid);
4548         if (!status)
4549                 status = decode_stateid(xdr, &res->stateid);
4550         return status;
4551 }
4552
4553 static int decode_putfh(struct xdr_stream *xdr)
4554 {
4555         return decode_op_hdr(xdr, OP_PUTFH);
4556 }
4557
4558 static int decode_putrootfh(struct xdr_stream *xdr)
4559 {
4560         return decode_op_hdr(xdr, OP_PUTROOTFH);
4561 }
4562
4563 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
4564 {
4565         struct kvec *iov = req->rq_rcv_buf.head;
4566         __be32 *p;
4567         uint32_t count, eof, recvd, hdrlen;
4568         int status;
4569
4570         status = decode_op_hdr(xdr, OP_READ);
4571         if (status)
4572                 return status;
4573         p = xdr_inline_decode(xdr, 8);
4574         if (unlikely(!p))
4575                 goto out_overflow;
4576         eof = be32_to_cpup(p++);
4577         count = be32_to_cpup(p);
4578         hdrlen = (u8 *) xdr->p - (u8 *) iov->iov_base;
4579         recvd = req->rq_rcv_buf.len - hdrlen;
4580         if (count > recvd) {
4581                 dprintk("NFS: server cheating in read reply: "
4582                                 "count %u > recvd %u\n", count, recvd);
4583                 count = recvd;
4584                 eof = 0;
4585         }
4586         xdr_read_pages(xdr, count);
4587         res->eof = eof;
4588         res->count = count;
4589         return 0;
4590 out_overflow:
4591         print_overflow_msg(__func__, xdr);
4592         return -EIO;
4593 }
4594
4595 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
4596 {
4597         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
4598         struct kvec     *iov = rcvbuf->head;
4599         size_t          hdrlen;
4600         u32             recvd, pglen = rcvbuf->page_len;
4601         int             status;
4602
4603         status = decode_op_hdr(xdr, OP_READDIR);
4604         if (!status)
4605                 status = decode_verifier(xdr, readdir->verifier.data);
4606         if (unlikely(status))
4607                 return status;
4608         dprintk("%s: verifier = %08x:%08x\n",
4609                         __func__,
4610                         ((u32 *)readdir->verifier.data)[0],
4611                         ((u32 *)readdir->verifier.data)[1]);
4612
4613
4614         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4615         recvd = rcvbuf->len - hdrlen;
4616         if (pglen > recvd)
4617                 pglen = recvd;
4618         xdr_read_pages(xdr, pglen);
4619
4620
4621         return pglen;
4622 }
4623
4624 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
4625 {
4626         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4627         struct kvec *iov = rcvbuf->head;
4628         size_t hdrlen;
4629         u32 len, recvd;
4630         __be32 *p;
4631         int status;
4632
4633         status = decode_op_hdr(xdr, OP_READLINK);
4634         if (status)
4635                 return status;
4636
4637         /* Convert length of symlink */
4638         p = xdr_inline_decode(xdr, 4);
4639         if (unlikely(!p))
4640                 goto out_overflow;
4641         len = be32_to_cpup(p);
4642         if (len >= rcvbuf->page_len || len <= 0) {
4643                 dprintk("nfs: server returned giant symlink!\n");
4644                 return -ENAMETOOLONG;
4645         }
4646         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4647         recvd = req->rq_rcv_buf.len - hdrlen;
4648         if (recvd < len) {
4649                 dprintk("NFS: server cheating in readlink reply: "
4650                                 "count %u > recvd %u\n", len, recvd);
4651                 return -EIO;
4652         }
4653         xdr_read_pages(xdr, len);
4654         /*
4655          * The XDR encode routine has set things up so that
4656          * the link text will be copied directly into the
4657          * buffer.  We just have to do overflow-checking,
4658          * and and null-terminate the text (the VFS expects
4659          * null-termination).
4660          */
4661         xdr_terminate_string(rcvbuf, len);
4662         return 0;
4663 out_overflow:
4664         print_overflow_msg(__func__, xdr);
4665         return -EIO;
4666 }
4667
4668 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4669 {
4670         int status;
4671
4672         status = decode_op_hdr(xdr, OP_REMOVE);
4673         if (status)
4674                 goto out;
4675         status = decode_change_info(xdr, cinfo);
4676 out:
4677         return status;
4678 }
4679
4680 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
4681               struct nfs4_change_info *new_cinfo)
4682 {
4683         int status;
4684
4685         status = decode_op_hdr(xdr, OP_RENAME);
4686         if (status)
4687                 goto out;
4688         if ((status = decode_change_info(xdr, old_cinfo)))
4689                 goto out;
4690         status = decode_change_info(xdr, new_cinfo);
4691 out:
4692         return status;
4693 }
4694
4695 static int decode_renew(struct xdr_stream *xdr)
4696 {
4697         return decode_op_hdr(xdr, OP_RENEW);
4698 }
4699
4700 static int
4701 decode_restorefh(struct xdr_stream *xdr)
4702 {
4703         return decode_op_hdr(xdr, OP_RESTOREFH);
4704 }
4705
4706 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
4707                 size_t *acl_len)
4708 {
4709         __be32 *savep;
4710         uint32_t attrlen,
4711                  bitmap[2] = {0};
4712         struct kvec *iov = req->rq_rcv_buf.head;
4713         int status;
4714
4715         *acl_len = 0;
4716         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4717                 goto out;
4718         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4719                 goto out;
4720         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4721                 goto out;
4722
4723         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
4724                 return -EIO;
4725         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
4726                 size_t hdrlen;
4727                 u32 recvd;
4728
4729                 /* We ignore &savep and don't do consistency checks on
4730                  * the attr length.  Let userspace figure it out.... */
4731                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
4732                 recvd = req->rq_rcv_buf.len - hdrlen;
4733                 if (attrlen > recvd) {
4734                         dprintk("NFS: server cheating in getattr"
4735                                         " acl reply: attrlen %u > recvd %u\n",
4736                                         attrlen, recvd);
4737                         return -EINVAL;
4738                 }
4739                 xdr_read_pages(xdr, attrlen);
4740                 *acl_len = attrlen;
4741         } else
4742                 status = -EOPNOTSUPP;
4743
4744 out:
4745         return status;
4746 }
4747
4748 static int
4749 decode_savefh(struct xdr_stream *xdr)
4750 {
4751         return decode_op_hdr(xdr, OP_SAVEFH);
4752 }
4753
4754 static int decode_setattr(struct xdr_stream *xdr)
4755 {
4756         __be32 *p;
4757         uint32_t bmlen;
4758         int status;
4759
4760         status = decode_op_hdr(xdr, OP_SETATTR);
4761         if (status)
4762                 return status;
4763         p = xdr_inline_decode(xdr, 4);
4764         if (unlikely(!p))
4765                 goto out_overflow;
4766         bmlen = be32_to_cpup(p);
4767         p = xdr_inline_decode(xdr, bmlen << 2);
4768         if (likely(p))
4769                 return 0;
4770 out_overflow:
4771         print_overflow_msg(__func__, xdr);
4772         return -EIO;
4773 }
4774
4775 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
4776 {
4777         __be32 *p;
4778         uint32_t opnum;
4779         int32_t nfserr;
4780
4781         p = xdr_inline_decode(xdr, 8);
4782         if (unlikely(!p))
4783                 goto out_overflow;
4784         opnum = be32_to_cpup(p++);
4785         if (opnum != OP_SETCLIENTID) {
4786                 dprintk("nfs: decode_setclientid: Server returned operation"
4787                         " %d\n", opnum);
4788                 return -EIO;
4789         }
4790         nfserr = be32_to_cpup(p);
4791         if (nfserr == NFS_OK) {
4792                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
4793                 if (unlikely(!p))
4794                         goto out_overflow;
4795                 p = xdr_decode_hyper(p, &res->clientid);
4796                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
4797         } else if (nfserr == NFSERR_CLID_INUSE) {
4798                 uint32_t len;
4799
4800                 /* skip netid string */
4801                 p = xdr_inline_decode(xdr, 4);
4802                 if (unlikely(!p))
4803                         goto out_overflow;
4804                 len = be32_to_cpup(p);
4805                 p = xdr_inline_decode(xdr, len);
4806                 if (unlikely(!p))
4807                         goto out_overflow;
4808
4809                 /* skip uaddr string */
4810                 p = xdr_inline_decode(xdr, 4);
4811                 if (unlikely(!p))
4812                         goto out_overflow;
4813                 len = be32_to_cpup(p);
4814                 p = xdr_inline_decode(xdr, len);
4815                 if (unlikely(!p))
4816                         goto out_overflow;
4817                 return -NFSERR_CLID_INUSE;
4818         } else
4819                 return nfs4_stat_to_errno(nfserr);
4820
4821         return 0;
4822 out_overflow:
4823         print_overflow_msg(__func__, xdr);
4824         return -EIO;
4825 }
4826
4827 static int decode_setclientid_confirm(struct xdr_stream *xdr)
4828 {
4829         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
4830 }
4831
4832 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
4833 {
4834         __be32 *p;
4835         int status;
4836
4837         status = decode_op_hdr(xdr, OP_WRITE);
4838         if (status)
4839                 return status;
4840
4841         p = xdr_inline_decode(xdr, 16);
4842         if (unlikely(!p))
4843                 goto out_overflow;
4844         res->count = be32_to_cpup(p++);
4845         res->verf->committed = be32_to_cpup(p++);
4846         memcpy(res->verf->verifier, p, 8);
4847         return 0;
4848 out_overflow:
4849         print_overflow_msg(__func__, xdr);
4850         return -EIO;
4851 }
4852
4853 static int decode_delegreturn(struct xdr_stream *xdr)
4854 {
4855         return decode_op_hdr(xdr, OP_DELEGRETURN);
4856 }
4857
4858 static int decode_secinfo_gss(struct xdr_stream *xdr, struct nfs4_secinfo_flavor *flavor)
4859 {
4860         __be32 *p;
4861
4862         p = xdr_inline_decode(xdr, 4);
4863         if (unlikely(!p))
4864                 goto out_overflow;
4865         flavor->gss.sec_oid4.len = be32_to_cpup(p);
4866         if (flavor->gss.sec_oid4.len > GSS_OID_MAX_LEN)
4867                 goto out_err;
4868
4869         p = xdr_inline_decode(xdr, flavor->gss.sec_oid4.len);
4870         if (unlikely(!p))
4871                 goto out_overflow;
4872         memcpy(flavor->gss.sec_oid4.data, p, flavor->gss.sec_oid4.len);
4873
4874         p = xdr_inline_decode(xdr, 8);
4875         if (unlikely(!p))
4876                 goto out_overflow;
4877         flavor->gss.qop4 = be32_to_cpup(p++);
4878         flavor->gss.service = be32_to_cpup(p);
4879
4880         return 0;
4881
4882 out_overflow:
4883         print_overflow_msg(__func__, xdr);
4884         return -EIO;
4885 out_err:
4886         return -EINVAL;
4887 }
4888
4889 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
4890 {
4891         struct nfs4_secinfo_flavor *sec_flavor;
4892         int status;
4893         __be32 *p;
4894         int i, num_flavors;
4895
4896         status = decode_op_hdr(xdr, OP_SECINFO);
4897         if (status)
4898                 goto out;
4899         p = xdr_inline_decode(xdr, 4);
4900         if (unlikely(!p))
4901                 goto out_overflow;
4902
4903         res->flavors->num_flavors = 0;
4904         num_flavors = be32_to_cpup(p);
4905
4906         for (i = 0; i < num_flavors; i++) {
4907                 sec_flavor = &res->flavors->flavors[i];
4908                 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
4909                         break;
4910
4911                 p = xdr_inline_decode(xdr, 4);
4912                 if (unlikely(!p))
4913                         goto out_overflow;
4914                 sec_flavor->flavor = be32_to_cpup(p);
4915
4916                 if (sec_flavor->flavor == RPC_AUTH_GSS) {
4917                         status = decode_secinfo_gss(xdr, sec_flavor);
4918                         if (status)
4919                                 goto out;
4920                 }
4921                 res->flavors->num_flavors++;
4922         }
4923
4924 out:
4925         return status;
4926 out_overflow:
4927         print_overflow_msg(__func__, xdr);
4928         return -EIO;
4929 }
4930
4931 #if defined(CONFIG_NFS_V4_1)
4932 static int decode_exchange_id(struct xdr_stream *xdr,
4933                               struct nfs41_exchange_id_res *res)
4934 {
4935         __be32 *p;
4936         uint32_t dummy;
4937         char *dummy_str;
4938         int status;
4939         struct nfs_client *clp = res->client;
4940
4941         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
4942         if (status)
4943                 return status;
4944
4945         p = xdr_inline_decode(xdr, 8);
4946         if (unlikely(!p))
4947                 goto out_overflow;
4948         xdr_decode_hyper(p, &clp->cl_clientid);
4949         p = xdr_inline_decode(xdr, 12);
4950         if (unlikely(!p))
4951                 goto out_overflow;
4952         clp->cl_seqid = be32_to_cpup(p++);
4953         clp->cl_exchange_flags = be32_to_cpup(p++);
4954
4955         /* We ask for SP4_NONE */
4956         dummy = be32_to_cpup(p);
4957         if (dummy != SP4_NONE)
4958                 return -EIO;
4959
4960         /* Throw away minor_id */
4961         p = xdr_inline_decode(xdr, 8);
4962         if (unlikely(!p))
4963                 goto out_overflow;
4964
4965         /* Throw away Major id */
4966         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4967         if (unlikely(status))
4968                 return status;
4969
4970         /* Throw away server_scope */
4971         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4972         if (unlikely(status))
4973                 return status;
4974
4975         /* Throw away Implementation id array */
4976         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4977         if (unlikely(status))
4978                 return status;
4979
4980         return 0;
4981 out_overflow:
4982         print_overflow_msg(__func__, xdr);
4983         return -EIO;
4984 }
4985
4986 static int decode_chan_attrs(struct xdr_stream *xdr,
4987                              struct nfs4_channel_attrs *attrs)
4988 {
4989         __be32 *p;
4990         u32 nr_attrs;
4991
4992         p = xdr_inline_decode(xdr, 28);
4993         if (unlikely(!p))
4994                 goto out_overflow;
4995         attrs->headerpadsz = be32_to_cpup(p++);
4996         attrs->max_rqst_sz = be32_to_cpup(p++);
4997         attrs->max_resp_sz = be32_to_cpup(p++);
4998         attrs->max_resp_sz_cached = be32_to_cpup(p++);
4999         attrs->max_ops = be32_to_cpup(p++);
5000         attrs->max_reqs = be32_to_cpup(p++);
5001         nr_attrs = be32_to_cpup(p);
5002         if (unlikely(nr_attrs > 1)) {
5003                 printk(KERN_WARNING "%s: Invalid rdma channel attrs count %u\n",
5004                         __func__, nr_attrs);
5005                 return -EINVAL;
5006         }
5007         if (nr_attrs == 1) {
5008                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5009                 if (unlikely(!p))
5010                         goto out_overflow;
5011         }
5012         return 0;
5013 out_overflow:
5014         print_overflow_msg(__func__, xdr);
5015         return -EIO;
5016 }
5017
5018 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5019 {
5020         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5021 }
5022
5023 static int decode_create_session(struct xdr_stream *xdr,
5024                                  struct nfs41_create_session_res *res)
5025 {
5026         __be32 *p;
5027         int status;
5028         struct nfs_client *clp = res->client;
5029         struct nfs4_session *session = clp->cl_session;
5030
5031         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5032         if (!status)
5033                 status = decode_sessionid(xdr, &session->sess_id);
5034         if (unlikely(status))
5035                 return status;
5036
5037         /* seqid, flags */
5038         p = xdr_inline_decode(xdr, 8);
5039         if (unlikely(!p))
5040                 goto out_overflow;
5041         clp->cl_seqid = be32_to_cpup(p++);
5042         session->flags = be32_to_cpup(p);
5043
5044         /* Channel attributes */
5045         status = decode_chan_attrs(xdr, &session->fc_attrs);
5046         if (!status)
5047                 status = decode_chan_attrs(xdr, &session->bc_attrs);
5048         return status;
5049 out_overflow:
5050         print_overflow_msg(__func__, xdr);
5051         return -EIO;
5052 }
5053
5054 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5055 {
5056         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5057 }
5058
5059 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5060 {
5061         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5062 }
5063 #endif /* CONFIG_NFS_V4_1 */
5064
5065 static int decode_sequence(struct xdr_stream *xdr,
5066                            struct nfs4_sequence_res *res,
5067                            struct rpc_rqst *rqstp)
5068 {
5069 #if defined(CONFIG_NFS_V4_1)
5070         struct nfs4_sessionid id;
5071         u32 dummy;
5072         int status;
5073         __be32 *p;
5074
5075         if (!res->sr_session)
5076                 return 0;
5077
5078         status = decode_op_hdr(xdr, OP_SEQUENCE);
5079         if (!status)
5080                 status = decode_sessionid(xdr, &id);
5081         if (unlikely(status))
5082                 goto out_err;
5083
5084         /*
5085          * If the server returns different values for sessionID, slotID or
5086          * sequence number, the server is looney tunes.
5087          */
5088         status = -EREMOTEIO;
5089
5090         if (memcmp(id.data, res->sr_session->sess_id.data,
5091                    NFS4_MAX_SESSIONID_LEN)) {
5092                 dprintk("%s Invalid session id\n", __func__);
5093                 goto out_err;
5094         }
5095
5096         p = xdr_inline_decode(xdr, 20);
5097         if (unlikely(!p))
5098                 goto out_overflow;
5099
5100         /* seqid */
5101         dummy = be32_to_cpup(p++);
5102         if (dummy != res->sr_slot->seq_nr) {
5103                 dprintk("%s Invalid sequence number\n", __func__);
5104                 goto out_err;
5105         }
5106         /* slot id */
5107         dummy = be32_to_cpup(p++);
5108         if (dummy != res->sr_slot - res->sr_session->fc_slot_table.slots) {
5109                 dprintk("%s Invalid slot id\n", __func__);
5110                 goto out_err;
5111         }
5112         /* highest slot id - currently not processed */
5113         dummy = be32_to_cpup(p++);
5114         /* target highest slot id - currently not processed */
5115         dummy = be32_to_cpup(p++);
5116         /* result flags */
5117         res->sr_status_flags = be32_to_cpup(p);
5118         status = 0;
5119 out_err:
5120         res->sr_status = status;
5121         return status;
5122 out_overflow:
5123         print_overflow_msg(__func__, xdr);
5124         status = -EIO;
5125         goto out_err;
5126 #else  /* CONFIG_NFS_V4_1 */
5127         return 0;
5128 #endif /* CONFIG_NFS_V4_1 */
5129 }
5130
5131 #if defined(CONFIG_NFS_V4_1)
5132
5133 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5134                                 struct pnfs_device *pdev)
5135 {
5136         __be32 *p;
5137         uint32_t len, type;
5138         int status;
5139
5140         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5141         if (status) {
5142                 if (status == -ETOOSMALL) {
5143                         p = xdr_inline_decode(xdr, 4);
5144                         if (unlikely(!p))
5145                                 goto out_overflow;
5146                         pdev->mincount = be32_to_cpup(p);
5147                         dprintk("%s: Min count too small. mincnt = %u\n",
5148                                 __func__, pdev->mincount);
5149                 }
5150                 return status;
5151         }
5152
5153         p = xdr_inline_decode(xdr, 8);
5154         if (unlikely(!p))
5155                 goto out_overflow;
5156         type = be32_to_cpup(p++);
5157         if (type != pdev->layout_type) {
5158                 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5159                         __func__, pdev->layout_type, type);
5160                 return -EINVAL;
5161         }
5162         /*
5163          * Get the length of the opaque device_addr4. xdr_read_pages places
5164          * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5165          * and places the remaining xdr data in xdr_buf->tail
5166          */
5167         pdev->mincount = be32_to_cpup(p);
5168         xdr_read_pages(xdr, pdev->mincount); /* include space for the length */
5169
5170         /* Parse notification bitmap, verifying that it is zero. */
5171         p = xdr_inline_decode(xdr, 4);
5172         if (unlikely(!p))
5173                 goto out_overflow;
5174         len = be32_to_cpup(p);
5175         if (len) {
5176                 uint32_t i;
5177
5178                 p = xdr_inline_decode(xdr, 4 * len);
5179                 if (unlikely(!p))
5180                         goto out_overflow;
5181                 for (i = 0; i < len; i++, p++) {
5182                         if (be32_to_cpup(p)) {
5183                                 dprintk("%s: notifications not supported\n",
5184                                         __func__);
5185                                 return -EIO;
5186                         }
5187                 }
5188         }
5189         return 0;
5190 out_overflow:
5191         print_overflow_msg(__func__, xdr);
5192         return -EIO;
5193 }
5194
5195 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5196                             struct nfs4_layoutget_res *res)
5197 {
5198         __be32 *p;
5199         int status;
5200         u32 layout_count;
5201         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5202         struct kvec *iov = rcvbuf->head;
5203         u32 hdrlen, recvd;
5204
5205         status = decode_op_hdr(xdr, OP_LAYOUTGET);
5206         if (status)
5207                 return status;
5208         p = xdr_inline_decode(xdr, 8 + NFS4_STATEID_SIZE);
5209         if (unlikely(!p))
5210                 goto out_overflow;
5211         res->return_on_close = be32_to_cpup(p++);
5212         p = xdr_decode_opaque_fixed(p, res->stateid.data, NFS4_STATEID_SIZE);
5213         layout_count = be32_to_cpup(p);
5214         if (!layout_count) {
5215                 dprintk("%s: server responded with empty layout array\n",
5216                         __func__);
5217                 return -EINVAL;
5218         }
5219
5220         p = xdr_inline_decode(xdr, 28);
5221         if (unlikely(!p))
5222                 goto out_overflow;
5223         p = xdr_decode_hyper(p, &res->range.offset);
5224         p = xdr_decode_hyper(p, &res->range.length);
5225         res->range.iomode = be32_to_cpup(p++);
5226         res->type = be32_to_cpup(p++);
5227         res->layoutp->len = be32_to_cpup(p);
5228
5229         dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5230                 __func__,
5231                 (unsigned long)res->range.offset,
5232                 (unsigned long)res->range.length,
5233                 res->range.iomode,
5234                 res->type,
5235                 res->layoutp->len);
5236
5237         hdrlen = (u8 *) xdr->p - (u8 *) iov->iov_base;
5238         recvd = req->rq_rcv_buf.len - hdrlen;
5239         if (res->layoutp->len > recvd) {
5240                 dprintk("NFS: server cheating in layoutget reply: "
5241                                 "layout len %u > recvd %u\n",
5242                                 res->layoutp->len, recvd);
5243                 return -EINVAL;
5244         }
5245
5246         xdr_read_pages(xdr, res->layoutp->len);
5247
5248         if (layout_count > 1) {
5249                 /* We only handle a length one array at the moment.  Any
5250                  * further entries are just ignored.  Note that this means
5251                  * the client may see a response that is less than the
5252                  * minimum it requested.
5253                  */
5254                 dprintk("%s: server responded with %d layouts, dropping tail\n",
5255                         __func__, layout_count);
5256         }
5257
5258         return 0;
5259 out_overflow:
5260         print_overflow_msg(__func__, xdr);
5261         return -EIO;
5262 }
5263
5264 static int decode_layoutreturn(struct xdr_stream *xdr,
5265                                struct nfs4_layoutreturn_res *res)
5266 {
5267         __be32 *p;
5268         int status;
5269
5270         status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5271         if (status)
5272                 return status;
5273         p = xdr_inline_decode(xdr, 4);
5274         if (unlikely(!p))
5275                 goto out_overflow;
5276         res->lrs_present = be32_to_cpup(p);
5277         if (res->lrs_present)
5278                 status = decode_stateid(xdr, &res->stateid);
5279         return status;
5280 out_overflow:
5281         print_overflow_msg(__func__, xdr);
5282         return -EIO;
5283 }
5284
5285 static int decode_layoutcommit(struct xdr_stream *xdr,
5286                                struct rpc_rqst *req,
5287                                struct nfs4_layoutcommit_res *res)
5288 {
5289         __be32 *p;
5290         __u32 sizechanged;
5291         int status;
5292
5293         status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5294         if (status)
5295                 return status;
5296
5297         p = xdr_inline_decode(xdr, 4);
5298         if (unlikely(!p))
5299                 goto out_overflow;
5300         sizechanged = be32_to_cpup(p);
5301
5302         if (sizechanged) {
5303                 /* throw away new size */
5304                 p = xdr_inline_decode(xdr, 8);
5305                 if (unlikely(!p))
5306                         goto out_overflow;
5307         }
5308         return 0;
5309 out_overflow:
5310         print_overflow_msg(__func__, xdr);
5311         return -EIO;
5312 }
5313 #endif /* CONFIG_NFS_V4_1 */
5314
5315 /*
5316  * END OF "GENERIC" DECODE ROUTINES.
5317  */
5318
5319 /*
5320  * Decode OPEN_DOWNGRADE response
5321  */
5322 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
5323                                        struct xdr_stream *xdr,
5324                                        struct nfs_closeres *res)
5325 {
5326         struct compound_hdr hdr;
5327         int status;
5328
5329         status = decode_compound_hdr(xdr, &hdr);
5330         if (status)
5331                 goto out;
5332         status = decode_sequence(xdr, &res->seq_res, rqstp);
5333         if (status)
5334                 goto out;
5335         status = decode_putfh(xdr);
5336         if (status)
5337                 goto out;
5338         status = decode_open_downgrade(xdr, res);
5339         if (status != 0)
5340                 goto out;
5341         decode_getfattr(xdr, res->fattr, res->server,
5342                         !RPC_IS_ASYNC(rqstp->rq_task));
5343 out:
5344         return status;
5345 }
5346
5347 /*
5348  * Decode ACCESS response
5349  */
5350 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5351                                struct nfs4_accessres *res)
5352 {
5353         struct compound_hdr hdr;
5354         int status;
5355
5356         status = decode_compound_hdr(xdr, &hdr);
5357         if (status)
5358                 goto out;
5359         status = decode_sequence(xdr, &res->seq_res, rqstp);
5360         if (status)
5361                 goto out;
5362         status = decode_putfh(xdr);
5363         if (status != 0)
5364                 goto out;
5365         status = decode_access(xdr, res);
5366         if (status != 0)
5367                 goto out;
5368         decode_getfattr(xdr, res->fattr, res->server,
5369                         !RPC_IS_ASYNC(rqstp->rq_task));
5370 out:
5371         return status;
5372 }
5373
5374 /*
5375  * Decode LOOKUP response
5376  */
5377 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5378                                struct nfs4_lookup_res *res)
5379 {
5380         struct compound_hdr hdr;
5381         int status;
5382
5383         status = decode_compound_hdr(xdr, &hdr);
5384         if (status)
5385                 goto out;
5386         status = decode_sequence(xdr, &res->seq_res, rqstp);
5387         if (status)
5388                 goto out;
5389         status = decode_putfh(xdr);
5390         if (status)
5391                 goto out;
5392         status = decode_lookup(xdr);
5393         if (status)
5394                 goto out;
5395         status = decode_getfh(xdr, res->fh);
5396         if (status)
5397                 goto out;
5398         status = decode_getfattr(xdr, res->fattr, res->server
5399                         ,!RPC_IS_ASYNC(rqstp->rq_task));
5400 out:
5401         return status;
5402 }
5403
5404 /*
5405  * Decode LOOKUP_ROOT response
5406  */
5407 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
5408                                     struct xdr_stream *xdr,
5409                                     struct nfs4_lookup_res *res)
5410 {
5411         struct compound_hdr hdr;
5412         int status;
5413
5414         status = decode_compound_hdr(xdr, &hdr);
5415         if (status)
5416                 goto out;
5417         status = decode_sequence(xdr, &res->seq_res, rqstp);
5418         if (status)
5419                 goto out;
5420         status = decode_putrootfh(xdr);
5421         if (status)
5422                 goto out;
5423         status = decode_getfh(xdr, res->fh);
5424         if (status == 0)
5425                 status = decode_getfattr(xdr, res->fattr, res->server,
5426                                 !RPC_IS_ASYNC(rqstp->rq_task));
5427 out:
5428         return status;
5429 }
5430
5431 /*
5432  * Decode REMOVE response
5433  */
5434 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5435                                struct nfs_removeres *res)
5436 {
5437         struct compound_hdr hdr;
5438         int status;
5439
5440         status = decode_compound_hdr(xdr, &hdr);
5441         if (status)
5442                 goto out;
5443         status = decode_sequence(xdr, &res->seq_res, rqstp);
5444         if (status)
5445                 goto out;
5446         status = decode_putfh(xdr);
5447         if (status)
5448                 goto out;
5449         status = decode_remove(xdr, &res->cinfo);
5450         if (status)
5451                 goto out;
5452         decode_getfattr(xdr, res->dir_attr, res->server,
5453                         !RPC_IS_ASYNC(rqstp->rq_task));
5454 out:
5455         return status;
5456 }
5457
5458 /*
5459  * Decode RENAME response
5460  */
5461 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5462                                struct nfs_renameres *res)
5463 {
5464         struct compound_hdr hdr;
5465         int status;
5466
5467         status = decode_compound_hdr(xdr, &hdr);
5468         if (status)
5469                 goto out;
5470         status = decode_sequence(xdr, &res->seq_res, rqstp);
5471         if (status)
5472                 goto out;
5473         status = decode_putfh(xdr);
5474         if (status)
5475                 goto out;
5476         status = decode_savefh(xdr);
5477         if (status)
5478                 goto out;
5479         status = decode_putfh(xdr);
5480         if (status)
5481                 goto out;
5482         status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
5483         if (status)
5484                 goto out;
5485         /* Current FH is target directory */
5486         if (decode_getfattr(xdr, res->new_fattr, res->server,
5487                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5488                 goto out;
5489         status = decode_restorefh(xdr);
5490         if (status)
5491                 goto out;
5492         decode_getfattr(xdr, res->old_fattr, res->server,
5493                         !RPC_IS_ASYNC(rqstp->rq_task));
5494 out:
5495         return status;
5496 }
5497
5498 /*
5499  * Decode LINK response
5500  */
5501 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5502                              struct nfs4_link_res *res)
5503 {
5504         struct compound_hdr hdr;
5505         int status;
5506
5507         status = decode_compound_hdr(xdr, &hdr);
5508         if (status)
5509                 goto out;
5510         status = decode_sequence(xdr, &res->seq_res, rqstp);
5511         if (status)
5512                 goto out;
5513         status = decode_putfh(xdr);
5514         if (status)
5515                 goto out;
5516         status = decode_savefh(xdr);
5517         if (status)
5518                 goto out;
5519         status = decode_putfh(xdr);
5520         if (status)
5521                 goto out;
5522         status = decode_link(xdr, &res->cinfo);
5523         if (status)
5524                 goto out;
5525         /*
5526          * Note order: OP_LINK leaves the directory as the current
5527          *             filehandle.
5528          */
5529         if (decode_getfattr(xdr, res->dir_attr, res->server,
5530                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5531                 goto out;
5532         status = decode_restorefh(xdr);
5533         if (status)
5534                 goto out;
5535         decode_getfattr(xdr, res->fattr, res->server,
5536                         !RPC_IS_ASYNC(rqstp->rq_task));
5537 out:
5538         return status;
5539 }
5540
5541 /*
5542  * Decode CREATE response
5543  */
5544 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5545                                struct nfs4_create_res *res)
5546 {
5547         struct compound_hdr hdr;
5548         int status;
5549
5550         status = decode_compound_hdr(xdr, &hdr);
5551         if (status)
5552                 goto out;
5553         status = decode_sequence(xdr, &res->seq_res, rqstp);
5554         if (status)
5555                 goto out;
5556         status = decode_putfh(xdr);
5557         if (status)
5558                 goto out;
5559         status = decode_savefh(xdr);
5560         if (status)
5561                 goto out;
5562         status = decode_create(xdr, &res->dir_cinfo);
5563         if (status)
5564                 goto out;
5565         status = decode_getfh(xdr, res->fh);
5566         if (status)
5567                 goto out;
5568         if (decode_getfattr(xdr, res->fattr, res->server,
5569                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5570                 goto out;
5571         status = decode_restorefh(xdr);
5572         if (status)
5573                 goto out;
5574         decode_getfattr(xdr, res->dir_fattr, res->server,
5575                         !RPC_IS_ASYNC(rqstp->rq_task));
5576 out:
5577         return status;
5578 }
5579
5580 /*
5581  * Decode SYMLINK response
5582  */
5583 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5584                                 struct nfs4_create_res *res)
5585 {
5586         return nfs4_xdr_dec_create(rqstp, xdr, res);
5587 }
5588
5589 /*
5590  * Decode GETATTR response
5591  */
5592 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5593                                 struct nfs4_getattr_res *res)
5594 {
5595         struct compound_hdr hdr;
5596         int status;
5597
5598         status = decode_compound_hdr(xdr, &hdr);
5599         if (status)
5600                 goto out;
5601         status = decode_sequence(xdr, &res->seq_res, rqstp);
5602         if (status)
5603                 goto out;
5604         status = decode_putfh(xdr);
5605         if (status)
5606                 goto out;
5607         status = decode_getfattr(xdr, res->fattr, res->server,
5608                         !RPC_IS_ASYNC(rqstp->rq_task));
5609 out:
5610         return status;
5611 }
5612
5613 /*
5614  * Encode an SETACL request
5615  */
5616 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
5617                                 struct nfs_setaclargs *args)
5618 {
5619         struct compound_hdr hdr = {
5620                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
5621         };
5622
5623         encode_compound_hdr(xdr, req, &hdr);
5624         encode_sequence(xdr, &args->seq_args, &hdr);
5625         encode_putfh(xdr, args->fh, &hdr);
5626         encode_setacl(xdr, args, &hdr);
5627         encode_nops(&hdr);
5628 }
5629
5630 /*
5631  * Decode SETACL response
5632  */
5633 static int
5634 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5635                     struct nfs_setaclres *res)
5636 {
5637         struct compound_hdr hdr;
5638         int status;
5639
5640         status = decode_compound_hdr(xdr, &hdr);
5641         if (status)
5642                 goto out;
5643         status = decode_sequence(xdr, &res->seq_res, rqstp);
5644         if (status)
5645                 goto out;
5646         status = decode_putfh(xdr);
5647         if (status)
5648                 goto out;
5649         status = decode_setattr(xdr);
5650 out:
5651         return status;
5652 }
5653
5654 /*
5655  * Decode GETACL response
5656  */
5657 static int
5658 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5659                     struct nfs_getaclres *res)
5660 {
5661         struct compound_hdr hdr;
5662         int status;
5663
5664         status = decode_compound_hdr(xdr, &hdr);
5665         if (status)
5666                 goto out;
5667         status = decode_sequence(xdr, &res->seq_res, rqstp);
5668         if (status)
5669                 goto out;
5670         status = decode_putfh(xdr);
5671         if (status)
5672                 goto out;
5673         status = decode_getacl(xdr, rqstp, &res->acl_len);
5674
5675 out:
5676         return status;
5677 }
5678
5679 /*
5680  * Decode CLOSE response
5681  */
5682 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5683                               struct nfs_closeres *res)
5684 {
5685         struct compound_hdr hdr;
5686         int status;
5687
5688         status = decode_compound_hdr(xdr, &hdr);
5689         if (status)
5690                 goto out;
5691         status = decode_sequence(xdr, &res->seq_res, rqstp);
5692         if (status)
5693                 goto out;
5694         status = decode_putfh(xdr);
5695         if (status)
5696                 goto out;
5697         status = decode_close(xdr, res);
5698         if (status != 0)
5699                 goto out;
5700         /*
5701          * Note: Server may do delete on close for this file
5702          *      in which case the getattr call will fail with
5703          *      an ESTALE error. Shouldn't be a problem,
5704          *      though, since fattr->valid will remain unset.
5705          */
5706         decode_getfattr(xdr, res->fattr, res->server,
5707                         !RPC_IS_ASYNC(rqstp->rq_task));
5708 out:
5709         return status;
5710 }
5711
5712 /*
5713  * Decode OPEN response
5714  */
5715 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5716                              struct nfs_openres *res)
5717 {
5718         struct compound_hdr hdr;
5719         int status;
5720
5721         status = decode_compound_hdr(xdr, &hdr);
5722         if (status)
5723                 goto out;
5724         status = decode_sequence(xdr, &res->seq_res, rqstp);
5725         if (status)
5726                 goto out;
5727         status = decode_putfh(xdr);
5728         if (status)
5729                 goto out;
5730         status = decode_savefh(xdr);
5731         if (status)
5732                 goto out;
5733         status = decode_open(xdr, res);
5734         if (status)
5735                 goto out;
5736         if (decode_getfh(xdr, &res->fh) != 0)
5737                 goto out;
5738         if (decode_getfattr(xdr, res->f_attr, res->server,
5739                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5740                 goto out;
5741         if (decode_restorefh(xdr) != 0)
5742                 goto out;
5743         decode_getfattr(xdr, res->dir_attr, res->server,
5744                         !RPC_IS_ASYNC(rqstp->rq_task));
5745 out:
5746         return status;
5747 }
5748
5749 /*
5750  * Decode OPEN_CONFIRM response
5751  */
5752 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
5753                                      struct xdr_stream *xdr,
5754                                      struct nfs_open_confirmres *res)
5755 {
5756         struct compound_hdr hdr;
5757         int status;
5758
5759         status = decode_compound_hdr(xdr, &hdr);
5760         if (status)
5761                 goto out;
5762         status = decode_putfh(xdr);
5763         if (status)
5764                 goto out;
5765         status = decode_open_confirm(xdr, res);
5766 out:
5767         return status;
5768 }
5769
5770 /*
5771  * Decode OPEN response
5772  */
5773 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
5774                                     struct xdr_stream *xdr,
5775                                     struct nfs_openres *res)
5776 {
5777         struct compound_hdr hdr;
5778         int status;
5779
5780         status = decode_compound_hdr(xdr, &hdr);
5781         if (status)
5782                 goto out;
5783         status = decode_sequence(xdr, &res->seq_res, rqstp);
5784         if (status)
5785                 goto out;
5786         status = decode_putfh(xdr);
5787         if (status)
5788                 goto out;
5789         status = decode_open(xdr, res);
5790         if (status)
5791                 goto out;
5792         decode_getfattr(xdr, res->f_attr, res->server,
5793                         !RPC_IS_ASYNC(rqstp->rq_task));
5794 out:
5795         return status;
5796 }
5797
5798 /*
5799  * Decode SETATTR response
5800  */
5801 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
5802                                 struct xdr_stream *xdr,
5803                                 struct nfs_setattrres *res)
5804 {
5805         struct compound_hdr hdr;
5806         int status;
5807
5808         status = decode_compound_hdr(xdr, &hdr);
5809         if (status)
5810                 goto out;
5811         status = decode_sequence(xdr, &res->seq_res, rqstp);
5812         if (status)
5813                 goto out;
5814         status = decode_putfh(xdr);
5815         if (status)
5816                 goto out;
5817         status = decode_setattr(xdr);
5818         if (status)
5819                 goto out;
5820         decode_getfattr(xdr, res->fattr, res->server,
5821                         !RPC_IS_ASYNC(rqstp->rq_task));
5822 out:
5823         return status;
5824 }
5825
5826 /*
5827  * Decode LOCK response
5828  */
5829 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5830                              struct nfs_lock_res *res)
5831 {
5832         struct compound_hdr hdr;
5833         int status;
5834
5835         status = decode_compound_hdr(xdr, &hdr);
5836         if (status)
5837                 goto out;
5838         status = decode_sequence(xdr, &res->seq_res, rqstp);
5839         if (status)
5840                 goto out;
5841         status = decode_putfh(xdr);
5842         if (status)
5843                 goto out;
5844         status = decode_lock(xdr, res);
5845 out:
5846         return status;
5847 }
5848
5849 /*
5850  * Decode LOCKT response
5851  */
5852 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5853                               struct nfs_lockt_res *res)
5854 {
5855         struct compound_hdr hdr;
5856         int status;
5857
5858         status = decode_compound_hdr(xdr, &hdr);
5859         if (status)
5860                 goto out;
5861         status = decode_sequence(xdr, &res->seq_res, rqstp);
5862         if (status)
5863                 goto out;
5864         status = decode_putfh(xdr);
5865         if (status)
5866                 goto out;
5867         status = decode_lockt(xdr, res);
5868 out:
5869         return status;
5870 }
5871
5872 /*
5873  * Decode LOCKU response
5874  */
5875 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5876                               struct nfs_locku_res *res)
5877 {
5878         struct compound_hdr hdr;
5879         int status;
5880
5881         status = decode_compound_hdr(xdr, &hdr);
5882         if (status)
5883                 goto out;
5884         status = decode_sequence(xdr, &res->seq_res, rqstp);
5885         if (status)
5886                 goto out;
5887         status = decode_putfh(xdr);
5888         if (status)
5889                 goto out;
5890         status = decode_locku(xdr, res);
5891 out:
5892         return status;
5893 }
5894
5895 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
5896                                           struct xdr_stream *xdr, void *dummy)
5897 {
5898         struct compound_hdr hdr;
5899         int status;
5900
5901         status = decode_compound_hdr(xdr, &hdr);
5902         if (!status)
5903                 status = decode_release_lockowner(xdr);
5904         return status;
5905 }
5906
5907 /*
5908  * Decode READLINK response
5909  */
5910 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
5911                                  struct xdr_stream *xdr,
5912                                  struct nfs4_readlink_res *res)
5913 {
5914         struct compound_hdr hdr;
5915         int status;
5916
5917         status = decode_compound_hdr(xdr, &hdr);
5918         if (status)
5919                 goto out;
5920         status = decode_sequence(xdr, &res->seq_res, rqstp);
5921         if (status)
5922                 goto out;
5923         status = decode_putfh(xdr);
5924         if (status)
5925                 goto out;
5926         status = decode_readlink(xdr, rqstp);
5927 out:
5928         return status;
5929 }
5930
5931 /*
5932  * Decode READDIR response
5933  */
5934 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5935                                 struct nfs4_readdir_res *res)
5936 {
5937         struct compound_hdr hdr;
5938         int status;
5939
5940         status = decode_compound_hdr(xdr, &hdr);
5941         if (status)
5942                 goto out;
5943         status = decode_sequence(xdr, &res->seq_res, rqstp);
5944         if (status)
5945                 goto out;
5946         status = decode_putfh(xdr);
5947         if (status)
5948                 goto out;
5949         status = decode_readdir(xdr, rqstp, res);
5950 out:
5951         return status;
5952 }
5953
5954 /*
5955  * Decode Read response
5956  */
5957 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5958                              struct nfs_readres *res)
5959 {
5960         struct compound_hdr hdr;
5961         int status;
5962
5963         status = decode_compound_hdr(xdr, &hdr);
5964         if (status)
5965                 goto out;
5966         status = decode_sequence(xdr, &res->seq_res, rqstp);
5967         if (status)
5968                 goto out;
5969         status = decode_putfh(xdr);
5970         if (status)
5971                 goto out;
5972         status = decode_read(xdr, rqstp, res);
5973         if (!status)
5974                 status = res->count;
5975 out:
5976         return status;
5977 }
5978
5979 /*
5980  * Decode WRITE response
5981  */
5982 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5983                               struct nfs_writeres *res)
5984 {
5985         struct compound_hdr hdr;
5986         int status;
5987
5988         status = decode_compound_hdr(xdr, &hdr);
5989         if (status)
5990                 goto out;
5991         status = decode_sequence(xdr, &res->seq_res, rqstp);
5992         if (status)
5993                 goto out;
5994         status = decode_putfh(xdr);
5995         if (status)
5996                 goto out;
5997         status = decode_write(xdr, res);
5998         if (status)
5999                 goto out;
6000         if (res->fattr)
6001                 decode_getfattr(xdr, res->fattr, res->server,
6002                                 !RPC_IS_ASYNC(rqstp->rq_task));
6003         if (!status)
6004                 status = res->count;
6005 out:
6006         return status;
6007 }
6008
6009 /*
6010  * Decode COMMIT response
6011  */
6012 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6013                                struct nfs_writeres *res)
6014 {
6015         struct compound_hdr hdr;
6016         int status;
6017
6018         status = decode_compound_hdr(xdr, &hdr);
6019         if (status)
6020                 goto out;
6021         status = decode_sequence(xdr, &res->seq_res, rqstp);
6022         if (status)
6023                 goto out;
6024         status = decode_putfh(xdr);
6025         if (status)
6026                 goto out;
6027         status = decode_commit(xdr, res);
6028         if (status)
6029                 goto out;
6030         if (res->fattr)
6031                 decode_getfattr(xdr, res->fattr, res->server,
6032                                 !RPC_IS_ASYNC(rqstp->rq_task));
6033 out:
6034         return status;
6035 }
6036
6037 /*
6038  * Decode FSINFO response
6039  */
6040 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6041                                struct nfs4_fsinfo_res *res)
6042 {
6043         struct compound_hdr hdr;
6044         int status;
6045
6046         status = decode_compound_hdr(xdr, &hdr);
6047         if (!status)
6048                 status = decode_sequence(xdr, &res->seq_res, req);
6049         if (!status)
6050                 status = decode_putfh(xdr);
6051         if (!status)
6052                 status = decode_fsinfo(xdr, res->fsinfo);
6053         return status;
6054 }
6055
6056 /*
6057  * Decode PATHCONF response
6058  */
6059 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6060                                  struct nfs4_pathconf_res *res)
6061 {
6062         struct compound_hdr hdr;
6063         int status;
6064
6065         status = decode_compound_hdr(xdr, &hdr);
6066         if (!status)
6067                 status = decode_sequence(xdr, &res->seq_res, req);
6068         if (!status)
6069                 status = decode_putfh(xdr);
6070         if (!status)
6071                 status = decode_pathconf(xdr, res->pathconf);
6072         return status;
6073 }
6074
6075 /*
6076  * Decode STATFS response
6077  */
6078 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6079                                struct nfs4_statfs_res *res)
6080 {
6081         struct compound_hdr hdr;
6082         int status;
6083
6084         status = decode_compound_hdr(xdr, &hdr);
6085         if (!status)
6086                 status = decode_sequence(xdr, &res->seq_res, req);
6087         if (!status)
6088                 status = decode_putfh(xdr);
6089         if (!status)
6090                 status = decode_statfs(xdr, res->fsstat);
6091         return status;
6092 }
6093
6094 /*
6095  * Decode GETATTR_BITMAP response
6096  */
6097 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6098                                     struct xdr_stream *xdr,
6099                                     struct nfs4_server_caps_res *res)
6100 {
6101         struct compound_hdr hdr;
6102         int status;
6103
6104         status = decode_compound_hdr(xdr, &hdr);
6105         if (status)
6106                 goto out;
6107         status = decode_sequence(xdr, &res->seq_res, req);
6108         if (status)
6109                 goto out;
6110         status = decode_putfh(xdr);
6111         if (status)
6112                 goto out;
6113         status = decode_server_caps(xdr, res);
6114 out:
6115         return status;
6116 }
6117
6118 /*
6119  * Decode RENEW response
6120  */
6121 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6122                               void *__unused)
6123 {
6124         struct compound_hdr hdr;
6125         int status;
6126
6127         status = decode_compound_hdr(xdr, &hdr);
6128         if (!status)
6129                 status = decode_renew(xdr);
6130         return status;
6131 }
6132
6133 /*
6134  * Decode SETCLIENTID response
6135  */
6136 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6137                                     struct xdr_stream *xdr,
6138                                     struct nfs4_setclientid_res *res)
6139 {
6140         struct compound_hdr hdr;
6141         int status;
6142
6143         status = decode_compound_hdr(xdr, &hdr);
6144         if (!status)
6145                 status = decode_setclientid(xdr, res);
6146         return status;
6147 }
6148
6149 /*
6150  * Decode SETCLIENTID_CONFIRM response
6151  */
6152 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6153                                             struct xdr_stream *xdr,
6154                                             struct nfs_fsinfo *fsinfo)
6155 {
6156         struct compound_hdr hdr;
6157         int status;
6158
6159         status = decode_compound_hdr(xdr, &hdr);
6160         if (!status)
6161                 status = decode_setclientid_confirm(xdr);
6162         if (!status)
6163                 status = decode_putrootfh(xdr);
6164         if (!status)
6165                 status = decode_fsinfo(xdr, fsinfo);
6166         return status;
6167 }
6168
6169 /*
6170  * Decode DELEGRETURN response
6171  */
6172 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6173                                     struct xdr_stream *xdr,
6174                                     struct nfs4_delegreturnres *res)
6175 {
6176         struct compound_hdr hdr;
6177         int status;
6178
6179         status = decode_compound_hdr(xdr, &hdr);
6180         if (status)
6181                 goto out;
6182         status = decode_sequence(xdr, &res->seq_res, rqstp);
6183         if (status)
6184                 goto out;
6185         status = decode_putfh(xdr);
6186         if (status != 0)
6187                 goto out;
6188         status = decode_delegreturn(xdr);
6189         if (status != 0)
6190                 goto out;
6191         decode_getfattr(xdr, res->fattr, res->server,
6192                         !RPC_IS_ASYNC(rqstp->rq_task));
6193 out:
6194         return status;
6195 }
6196
6197 /*
6198  * Decode FS_LOCATIONS response
6199  */
6200 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6201                                      struct xdr_stream *xdr,
6202                                      struct nfs4_fs_locations_res *res)
6203 {
6204         struct compound_hdr hdr;
6205         int status;
6206
6207         status = decode_compound_hdr(xdr, &hdr);
6208         if (status)
6209                 goto out;
6210         status = decode_sequence(xdr, &res->seq_res, req);
6211         if (status)
6212                 goto out;
6213         status = decode_putfh(xdr);
6214         if (status)
6215                 goto out;
6216         status = decode_lookup(xdr);
6217         if (status)
6218                 goto out;
6219         xdr_enter_page(xdr, PAGE_SIZE);
6220         status = decode_getfattr(xdr, &res->fs_locations->fattr,
6221                                  res->fs_locations->server,
6222                                  !RPC_IS_ASYNC(req->rq_task));
6223 out:
6224         return status;
6225 }
6226
6227 /*
6228  * Decode SECINFO response
6229  */
6230 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6231                                 struct xdr_stream *xdr,
6232                                 struct nfs4_secinfo_res *res)
6233 {
6234         struct compound_hdr hdr;
6235         int status;
6236
6237         status = decode_compound_hdr(xdr, &hdr);
6238         if (status)
6239                 goto out;
6240         status = decode_sequence(xdr, &res->seq_res, rqstp);
6241         if (status)
6242                 goto out;
6243         status = decode_putfh(xdr);
6244         if (status)
6245                 goto out;
6246         status = decode_secinfo(xdr, res);
6247         if (status)
6248                 goto out;
6249 out:
6250         return status;
6251 }
6252
6253 #if defined(CONFIG_NFS_V4_1)
6254 /*
6255  * Decode EXCHANGE_ID response
6256  */
6257 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
6258                                     struct xdr_stream *xdr,
6259                                     void *res)
6260 {
6261         struct compound_hdr hdr;
6262         int status;
6263
6264         status = decode_compound_hdr(xdr, &hdr);
6265         if (!status)
6266                 status = decode_exchange_id(xdr, res);
6267         return status;
6268 }
6269
6270 /*
6271  * Decode CREATE_SESSION response
6272  */
6273 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
6274                                        struct xdr_stream *xdr,
6275                                        struct nfs41_create_session_res *res)
6276 {
6277         struct compound_hdr hdr;
6278         int status;
6279
6280         status = decode_compound_hdr(xdr, &hdr);
6281         if (!status)
6282                 status = decode_create_session(xdr, res);
6283         return status;
6284 }
6285
6286 /*
6287  * Decode DESTROY_SESSION response
6288  */
6289 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
6290                                         struct xdr_stream *xdr,
6291                                         void *res)
6292 {
6293         struct compound_hdr hdr;
6294         int status;
6295
6296         status = decode_compound_hdr(xdr, &hdr);
6297         if (!status)
6298                 status = decode_destroy_session(xdr, res);
6299         return status;
6300 }
6301
6302 /*
6303  * Decode SEQUENCE response
6304  */
6305 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
6306                                  struct xdr_stream *xdr,
6307                                  struct nfs4_sequence_res *res)
6308 {
6309         struct compound_hdr hdr;
6310         int status;
6311
6312         status = decode_compound_hdr(xdr, &hdr);
6313         if (!status)
6314                 status = decode_sequence(xdr, res, rqstp);
6315         return status;
6316 }
6317
6318 /*
6319  * Decode GET_LEASE_TIME response
6320  */
6321 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
6322                                        struct xdr_stream *xdr,
6323                                        struct nfs4_get_lease_time_res *res)
6324 {
6325         struct compound_hdr hdr;
6326         int status;
6327
6328         status = decode_compound_hdr(xdr, &hdr);
6329         if (!status)
6330                 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
6331         if (!status)
6332                 status = decode_putrootfh(xdr);
6333         if (!status)
6334                 status = decode_fsinfo(xdr, res->lr_fsinfo);
6335         return status;
6336 }
6337
6338 /*
6339  * Decode RECLAIM_COMPLETE response
6340  */
6341 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
6342                                          struct xdr_stream *xdr,
6343                                          struct nfs41_reclaim_complete_res *res)
6344 {
6345         struct compound_hdr hdr;
6346         int status;
6347
6348         status = decode_compound_hdr(xdr, &hdr);
6349         if (!status)
6350                 status = decode_sequence(xdr, &res->seq_res, rqstp);
6351         if (!status)
6352                 status = decode_reclaim_complete(xdr, (void *)NULL);
6353         return status;
6354 }
6355
6356 /*
6357  * Decode GETDEVINFO response
6358  */
6359 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
6360                                       struct xdr_stream *xdr,
6361                                       struct nfs4_getdeviceinfo_res *res)
6362 {
6363         struct compound_hdr hdr;
6364         int status;
6365
6366         status = decode_compound_hdr(xdr, &hdr);
6367         if (status != 0)
6368                 goto out;
6369         status = decode_sequence(xdr, &res->seq_res, rqstp);
6370         if (status != 0)
6371                 goto out;
6372         status = decode_getdeviceinfo(xdr, res->pdev);
6373 out:
6374         return status;
6375 }
6376
6377 /*
6378  * Decode LAYOUTGET response
6379  */
6380 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
6381                                   struct xdr_stream *xdr,
6382                                   struct nfs4_layoutget_res *res)
6383 {
6384         struct compound_hdr hdr;
6385         int status;
6386
6387         status = decode_compound_hdr(xdr, &hdr);
6388         if (status)
6389                 goto out;
6390         status = decode_sequence(xdr, &res->seq_res, rqstp);
6391         if (status)
6392                 goto out;
6393         status = decode_putfh(xdr);
6394         if (status)
6395                 goto out;
6396         status = decode_layoutget(xdr, rqstp, res);
6397 out:
6398         return status;
6399 }
6400
6401 /*
6402  * Decode LAYOUTRETURN response
6403  */
6404 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
6405                                      struct xdr_stream *xdr,
6406                                      struct nfs4_layoutreturn_res *res)
6407 {
6408         struct compound_hdr hdr;
6409         int status;
6410
6411         status = decode_compound_hdr(xdr, &hdr);
6412         if (status)
6413                 goto out;
6414         status = decode_sequence(xdr, &res->seq_res, rqstp);
6415         if (status)
6416                 goto out;
6417         status = decode_putfh(xdr);
6418         if (status)
6419                 goto out;
6420         status = decode_layoutreturn(xdr, res);
6421 out:
6422         return status;
6423 }
6424
6425 /*
6426  * Decode LAYOUTCOMMIT response
6427  */
6428 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
6429                                      struct xdr_stream *xdr,
6430                                      struct nfs4_layoutcommit_res *res)
6431 {
6432         struct compound_hdr hdr;
6433         int status;
6434
6435         status = decode_compound_hdr(xdr, &hdr);
6436         if (status)
6437                 goto out;
6438         status = decode_sequence(xdr, &res->seq_res, rqstp);
6439         if (status)
6440                 goto out;
6441         status = decode_putfh(xdr);
6442         if (status)
6443                 goto out;
6444         status = decode_layoutcommit(xdr, rqstp, res);
6445         if (status)
6446                 goto out;
6447         decode_getfattr(xdr, res->fattr, res->server,
6448                         !RPC_IS_ASYNC(rqstp->rq_task));
6449 out:
6450         return status;
6451 }
6452 #endif /* CONFIG_NFS_V4_1 */
6453
6454 /**
6455  * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
6456  *                      the local page cache.
6457  * @xdr: XDR stream where entry resides
6458  * @entry: buffer to fill in with entry data
6459  * @plus: boolean indicating whether this should be a readdirplus entry
6460  *
6461  * Returns zero if successful, otherwise a negative errno value is
6462  * returned.
6463  *
6464  * This function is not invoked during READDIR reply decoding, but
6465  * rather whenever an application invokes the getdents(2) system call
6466  * on a directory already in our cache.
6467  */
6468 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
6469                        int plus)
6470 {
6471         uint32_t bitmap[2] = {0};
6472         uint32_t len;
6473         __be32 *p = xdr_inline_decode(xdr, 4);
6474         if (unlikely(!p))
6475                 goto out_overflow;
6476         if (*p == xdr_zero) {
6477                 p = xdr_inline_decode(xdr, 4);
6478                 if (unlikely(!p))
6479                         goto out_overflow;
6480                 if (*p == xdr_zero)
6481                         return -EAGAIN;
6482                 entry->eof = 1;
6483                 return -EBADCOOKIE;
6484         }
6485
6486         p = xdr_inline_decode(xdr, 12);
6487         if (unlikely(!p))
6488                 goto out_overflow;
6489         entry->prev_cookie = entry->cookie;
6490         p = xdr_decode_hyper(p, &entry->cookie);
6491         entry->len = be32_to_cpup(p);
6492
6493         p = xdr_inline_decode(xdr, entry->len);
6494         if (unlikely(!p))
6495                 goto out_overflow;
6496         entry->name = (const char *) p;
6497
6498         /*
6499          * In case the server doesn't return an inode number,
6500          * we fake one here.  (We don't use inode number 0,
6501          * since glibc seems to choke on it...)
6502          */
6503         entry->ino = 1;
6504         entry->fattr->valid = 0;
6505
6506         if (decode_attr_bitmap(xdr, bitmap) < 0)
6507                 goto out_overflow;
6508
6509         if (decode_attr_length(xdr, &len, &p) < 0)
6510                 goto out_overflow;
6511
6512         if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
6513                                         entry->server, 1) < 0)
6514                 goto out_overflow;
6515         if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
6516                 entry->ino = entry->fattr->mounted_on_fileid;
6517         else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
6518                 entry->ino = entry->fattr->fileid;
6519
6520         entry->d_type = DT_UNKNOWN;
6521         if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
6522                 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
6523
6524         return 0;
6525
6526 out_overflow:
6527         print_overflow_msg(__func__, xdr);
6528         return -EAGAIN;
6529 }
6530
6531 /*
6532  * We need to translate between nfs status return values and
6533  * the local errno values which may not be the same.
6534  */
6535 static struct {
6536         int stat;
6537         int errno;
6538 } nfs_errtbl[] = {
6539         { NFS4_OK,              0               },
6540         { NFS4ERR_PERM,         -EPERM          },
6541         { NFS4ERR_NOENT,        -ENOENT         },
6542         { NFS4ERR_IO,           -errno_NFSERR_IO},
6543         { NFS4ERR_NXIO,         -ENXIO          },
6544         { NFS4ERR_ACCESS,       -EACCES         },
6545         { NFS4ERR_EXIST,        -EEXIST         },
6546         { NFS4ERR_XDEV,         -EXDEV          },
6547         { NFS4ERR_NOTDIR,       -ENOTDIR        },
6548         { NFS4ERR_ISDIR,        -EISDIR         },
6549         { NFS4ERR_INVAL,        -EINVAL         },
6550         { NFS4ERR_FBIG,         -EFBIG          },
6551         { NFS4ERR_NOSPC,        -ENOSPC         },
6552         { NFS4ERR_ROFS,         -EROFS          },
6553         { NFS4ERR_MLINK,        -EMLINK         },
6554         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
6555         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
6556         { NFS4ERR_DQUOT,        -EDQUOT         },
6557         { NFS4ERR_STALE,        -ESTALE         },
6558         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
6559         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
6560         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
6561         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
6562         { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
6563         { NFS4ERR_BADTYPE,      -EBADTYPE       },
6564         { NFS4ERR_LOCKED,       -EAGAIN         },
6565         { NFS4ERR_SYMLINK,      -ELOOP          },
6566         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
6567         { NFS4ERR_DEADLOCK,     -EDEADLK        },
6568         { -1,                   -EIO            }
6569 };
6570
6571 /*
6572  * Convert an NFS error code to a local one.
6573  * This one is used jointly by NFSv2 and NFSv3.
6574  */
6575 static int
6576 nfs4_stat_to_errno(int stat)
6577 {
6578         int i;
6579         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
6580                 if (nfs_errtbl[i].stat == stat)
6581                         return nfs_errtbl[i].errno;
6582         }
6583         if (stat <= 10000 || stat > 10100) {
6584                 /* The server is looney tunes. */
6585                 return -EREMOTEIO;
6586         }
6587         /* If we cannot translate the error, the recovery routines should
6588          * handle it.
6589          * Note: remaining NFSv4 error codes have values > 10000, so should
6590          * not conflict with native Linux error codes.
6591          */
6592         return -stat;
6593 }
6594
6595 #define PROC(proc, argtype, restype)                            \
6596 [NFSPROC4_CLNT_##proc] = {                                      \
6597         .p_proc   = NFSPROC4_COMPOUND,                          \
6598         .p_encode = (kxdreproc_t)nfs4_xdr_##argtype,            \
6599         .p_decode = (kxdrdproc_t)nfs4_xdr_##restype,            \
6600         .p_arglen = NFS4_##argtype##_sz,                        \
6601         .p_replen = NFS4_##restype##_sz,                        \
6602         .p_statidx = NFSPROC4_CLNT_##proc,                      \
6603         .p_name   = #proc,                                      \
6604 }
6605
6606 struct rpc_procinfo     nfs4_procedures[] = {
6607         PROC(READ,              enc_read,               dec_read),
6608         PROC(WRITE,             enc_write,              dec_write),
6609         PROC(COMMIT,            enc_commit,             dec_commit),
6610         PROC(OPEN,              enc_open,               dec_open),
6611         PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
6612         PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
6613         PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
6614         PROC(CLOSE,             enc_close,              dec_close),
6615         PROC(SETATTR,           enc_setattr,            dec_setattr),
6616         PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
6617         PROC(RENEW,             enc_renew,              dec_renew),
6618         PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
6619         PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
6620         PROC(LOCK,              enc_lock,               dec_lock),
6621         PROC(LOCKT,             enc_lockt,              dec_lockt),
6622         PROC(LOCKU,             enc_locku,              dec_locku),
6623         PROC(ACCESS,            enc_access,             dec_access),
6624         PROC(GETATTR,           enc_getattr,            dec_getattr),
6625         PROC(LOOKUP,            enc_lookup,             dec_lookup),
6626         PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
6627         PROC(REMOVE,            enc_remove,             dec_remove),
6628         PROC(RENAME,            enc_rename,             dec_rename),
6629         PROC(LINK,              enc_link,               dec_link),
6630         PROC(SYMLINK,           enc_symlink,            dec_symlink),
6631         PROC(CREATE,            enc_create,             dec_create),
6632         PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
6633         PROC(STATFS,            enc_statfs,             dec_statfs),
6634         PROC(READLINK,          enc_readlink,           dec_readlink),
6635         PROC(READDIR,           enc_readdir,            dec_readdir),
6636         PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
6637         PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
6638         PROC(GETACL,            enc_getacl,             dec_getacl),
6639         PROC(SETACL,            enc_setacl,             dec_setacl),
6640         PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
6641         PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
6642         PROC(SECINFO,           enc_secinfo,            dec_secinfo),
6643 #if defined(CONFIG_NFS_V4_1)
6644         PROC(EXCHANGE_ID,       enc_exchange_id,        dec_exchange_id),
6645         PROC(CREATE_SESSION,    enc_create_session,     dec_create_session),
6646         PROC(DESTROY_SESSION,   enc_destroy_session,    dec_destroy_session),
6647         PROC(SEQUENCE,          enc_sequence,           dec_sequence),
6648         PROC(GET_LEASE_TIME,    enc_get_lease_time,     dec_get_lease_time),
6649         PROC(RECLAIM_COMPLETE,  enc_reclaim_complete,   dec_reclaim_complete),
6650         PROC(GETDEVICEINFO,     enc_getdeviceinfo,      dec_getdeviceinfo),
6651         PROC(LAYOUTGET,         enc_layoutget,          dec_layoutget),
6652         PROC(LAYOUTCOMMIT,      enc_layoutcommit,       dec_layoutcommit),
6653         PROC(LAYOUTRETURN,      enc_layoutreturn,       dec_layoutreturn),
6654 #endif /* CONFIG_NFS_V4_1 */
6655 };
6656
6657 struct rpc_version              nfs_version4 = {
6658         .number                 = 4,
6659         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
6660         .procs                  = nfs4_procedures
6661 };
6662
6663 /*
6664  * Local variables:
6665  *  c-basic-offset: 8
6666  * End:
6667  */