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/module.h>
  48 #include <linux/utsname.h>
  49 #include <linux/sunrpc/clnt.h>
  50 #include <linux/sunrpc/msg_prot.h>
  51 #include <linux/sunrpc/gss_api.h>
  52 #include <linux/nfs.h>
  53 #include <linux/nfs4.h>
  54 #include <linux/nfs_fs.h>
  55 #include <linux/nfs_idmap.h>
  56
  57 #include "nfs4_fs.h"
  58 #include "internal.h"
  59 #include "pnfs.h"
  60 #include "netns.h"
  61
  62 #define NFSDBG_FACILITY         NFSDBG_XDR
  63
  64 /* Mapping from NFS error code to "errno" error code. */
  65 #define errno_NFSERR_IO         EIO
  66
  67 static int nfs4_stat_to_errno(int);
  68
  69 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
  70 #ifdef DEBUG
  71 #define NFS4_MAXTAGLEN          20
  72 #else
  73 #define NFS4_MAXTAGLEN          0
  74 #endif
  75
  76 /* lock,open owner id:
  77  * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT  >> 2)
  78  */
  79 #define open_owner_id_maxsz     (1 + 2 + 1 + 1 + 2)
  80 #define lock_owner_id_maxsz     (1 + 1 + 4)
  81 #define decode_lockowner_maxsz  (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  82 #define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  83 #define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  84 #define op_encode_hdr_maxsz     (1)
  85 #define op_decode_hdr_maxsz     (2)
  86 #define encode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  87 #define decode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  88 #define encode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  89 #define decode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  90 #define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
  91                                 (NFS4_FHSIZE >> 2))
  92 #define decode_putfh_maxsz      (op_decode_hdr_maxsz)
  93 #define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
  94 #define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
  95 #define encode_getfh_maxsz      (op_encode_hdr_maxsz)
  96 #define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
  97                                 ((3+NFS4_FHSIZE) >> 2))
  98 #define nfs4_fattr_bitmap_maxsz 4
  99 #define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
 100 #define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
 101 #define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
 102 #define nfs4_owner_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 103 #define nfs4_group_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 104 /* We support only one layout type per file system */
 105 #define decode_mdsthreshold_maxsz (1 + 1 + nfs4_fattr_bitmap_maxsz + 1 + 8)
 106 /* This is based on getfattr, which uses the most attributes: */
 107 #define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
 108                                 3 + 3 + 3 + nfs4_owner_maxsz + \
 109                                 nfs4_group_maxsz + decode_mdsthreshold_maxsz))
 110 #define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
 111                                 nfs4_fattr_value_maxsz)
 112 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
 113 #define encode_attrs_maxsz      (nfs4_fattr_bitmap_maxsz + \
 114                                  1 + 2 + 1 + \
 115                                 nfs4_owner_maxsz + \
 116                                 nfs4_group_maxsz + \
 117                                 4 + 4)
 118 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
 119 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
 120 #define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
 121 #define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 122 #define encode_fsinfo_maxsz     (encode_getattr_maxsz)
 123 /* The 5 accounts for the PNFS attributes, and assumes that at most three
 124  * layout types will be returned.
 125  */
 126 #define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + \
 127                                  nfs4_fattr_bitmap_maxsz + 4 + 8 + 5)
 128 #define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 129 #define decode_renew_maxsz      (op_decode_hdr_maxsz)
 130 #define encode_setclientid_maxsz \
 131                                 (op_encode_hdr_maxsz + \
 132                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 133                                 XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
 134                                 1 /* sc_prog */ + \
 135                                 XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 136                                 XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
 137                                 1) /* sc_cb_ident */
 138 #define decode_setclientid_maxsz \
 139                                 (op_decode_hdr_maxsz + \
 140                                 2 + \
 141                                 1024) /* large value for CLID_INUSE */
 142 #define encode_setclientid_confirm_maxsz \
 143                                 (op_encode_hdr_maxsz + \
 144                                 3 + (NFS4_VERIFIER_SIZE >> 2))
 145 #define decode_setclientid_confirm_maxsz \
 146                                 (op_decode_hdr_maxsz)
 147 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
 148 #define decode_lookup_maxsz     (op_decode_hdr_maxsz)
 149 #define encode_share_access_maxsz \
 150                                 (2)
 151 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
 152 #define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
 153 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
 154 #define encode_open_maxsz       (op_encode_hdr_maxsz + \
 155                                 2 + encode_share_access_maxsz + 2 + \
 156                                 open_owner_id_maxsz + \
 157                                 encode_opentype_maxsz + \
 158                                 encode_claim_null_maxsz)
 159 #define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
 160 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
 161                                 decode_ace_maxsz)
 162 #define decode_change_info_maxsz        (5)
 163 #define decode_open_maxsz       (op_decode_hdr_maxsz + \
 164                                 decode_stateid_maxsz + \
 165                                 decode_change_info_maxsz + 1 + \
 166                                 nfs4_fattr_bitmap_maxsz + \
 167                                 decode_delegation_maxsz)
 168 #define encode_open_confirm_maxsz \
 169                                 (op_encode_hdr_maxsz + \
 170                                  encode_stateid_maxsz + 1)
 171 #define decode_open_confirm_maxsz \
 172                                 (op_decode_hdr_maxsz + \
 173                                  decode_stateid_maxsz)
 174 #define encode_open_downgrade_maxsz \
 175                                 (op_encode_hdr_maxsz + \
 176                                  encode_stateid_maxsz + 1 + \
 177                                  encode_share_access_maxsz)
 178 #define decode_open_downgrade_maxsz \
 179                                 (op_decode_hdr_maxsz + \
 180                                  decode_stateid_maxsz)
 181 #define encode_close_maxsz      (op_encode_hdr_maxsz + \
 182                                  1 + encode_stateid_maxsz)
 183 #define decode_close_maxsz      (op_decode_hdr_maxsz + \
 184                                  decode_stateid_maxsz)
 185 #define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
 186                                  encode_stateid_maxsz + \
 187                                  encode_attrs_maxsz)
 188 #define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
 189                                  nfs4_fattr_bitmap_maxsz)
 190 #define encode_read_maxsz       (op_encode_hdr_maxsz + \
 191                                  encode_stateid_maxsz + 3)
 192 #define decode_read_maxsz       (op_decode_hdr_maxsz + 2)
 193 #define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
 194                                  2 + encode_verifier_maxsz + 5)
 195 #define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
 196                                  decode_verifier_maxsz)
 197 #define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 198 #define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1)
 199 #define encode_write_maxsz      (op_encode_hdr_maxsz + \
 200                                  encode_stateid_maxsz + 4)
 201 #define decode_write_maxsz      (op_decode_hdr_maxsz + \
 202                                  2 + decode_verifier_maxsz)
 203 #define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
 204 #define decode_commit_maxsz     (op_decode_hdr_maxsz + \
 205                                  decode_verifier_maxsz)
 206 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 207                                 nfs4_name_maxsz)
 208 #define decode_remove_maxsz     (op_decode_hdr_maxsz + \
 209                                  decode_change_info_maxsz)
 210 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 211                                 2 * nfs4_name_maxsz)
 212 #define decode_rename_maxsz     (op_decode_hdr_maxsz + \
 213                                  decode_change_info_maxsz + \
 214                                  decode_change_info_maxsz)
 215 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 216                                 nfs4_name_maxsz)
 217 #define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
 218 #define encode_lockowner_maxsz  (7)
 219 #define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 220                                  7 + \
 221                                  1 + encode_stateid_maxsz + 1 + \
 222                                  encode_lockowner_maxsz)
 223 #define decode_lock_denied_maxsz \
 224                                 (8 + decode_lockowner_maxsz)
 225 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 226                                  decode_lock_denied_maxsz)
 227 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 5 + \
 228                                 encode_lockowner_maxsz)
 229 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 230                                  decode_lock_denied_maxsz)
 231 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 232                                  encode_stateid_maxsz + \
 233                                  4)
 234 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 235                                  decode_stateid_maxsz)
 236 #define encode_release_lockowner_maxsz \
 237                                 (op_encode_hdr_maxsz + \
 238                                  encode_lockowner_maxsz)
 239 #define decode_release_lockowner_maxsz \
 240                                 (op_decode_hdr_maxsz)
 241 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 242 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 243 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 244                                 1 + nfs4_name_maxsz + \
 245                                 1 + \
 246                                 nfs4_fattr_maxsz)
 247 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 248 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 249                                 1 + 2 + nfs4_name_maxsz + \
 250                                 encode_attrs_maxsz)
 251 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
 252                                 decode_change_info_maxsz + \
 253                                 nfs4_fattr_bitmap_maxsz)
 254 #define encode_statfs_maxsz     (encode_getattr_maxsz)
 255 #define decode_statfs_maxsz     (decode_getattr_maxsz)
 256 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 257 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 258 #define encode_getacl_maxsz     (encode_getattr_maxsz)
 259 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 260                                  nfs4_fattr_bitmap_maxsz + 1)
 261 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 262                                  encode_stateid_maxsz + 3)
 263 #define decode_setacl_maxsz     (decode_setattr_maxsz)
 264 #define encode_fs_locations_maxsz \
 265                                 (encode_getattr_maxsz)
 266 #define decode_fs_locations_maxsz \
 267                                 (0)
 268 #define encode_secinfo_maxsz    (op_encode_hdr_maxsz + nfs4_name_maxsz)
 269 #define decode_secinfo_maxsz    (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
 270
 271 #if defined(CONFIG_NFS_V4_1)
 272 #define NFS4_MAX_MACHINE_NAME_LEN (64)
 273
 274 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
 275                                 encode_verifier_maxsz + \
 276                                 1 /* co_ownerid.len */ + \
 277                                 XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
 278                                 1 /* flags */ + \
 279                                 1 /* spa_how */ + \
 280                                 0 /* SP4_NONE (for now) */ + \
 281                                 1 /* implementation id array of size 1 */ + \
 282                                 1 /* nii_domain */ + \
 283                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 284                                 1 /* nii_name */ + \
 285                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 286                                 3 /* nii_date */)
 287 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
 288                                 2 /* eir_clientid */ + \
 289                                 1 /* eir_sequenceid */ + \
 290                                 1 /* eir_flags */ + \
 291                                 1 /* spr_how */ + \
 292                                 0 /* SP4_NONE (for now) */ + \
 293                                 2 /* eir_server_owner.so_minor_id */ + \
 294                                 /* eir_server_owner.so_major_id<> */ \
 295                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 296                                 /* eir_server_scope<> */ \
 297                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 298                                 1 /* eir_server_impl_id array length */ + \
 299                                 1 /* nii_domain */ + \
 300                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 301                                 1 /* nii_name */ + \
 302                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 303                                 3 /* nii_date */)
 304 #define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
 305 #define decode_channel_attrs_maxsz  (6 + \
 306                                      1 /* ca_rdma_ird.len */ + \
 307                                      1 /* ca_rdma_ird */)
 308 #define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
 309                                      2 /* csa_clientid */ + \
 310                                      1 /* csa_sequence */ + \
 311                                      1 /* csa_flags */ + \
 312                                      encode_channel_attrs_maxsz + \
 313                                      encode_channel_attrs_maxsz + \
 314                                      1 /* csa_cb_program */ + \
 315                                      1 /* csa_sec_parms.len (1) */ + \
 316                                      1 /* cb_secflavor (AUTH_SYS) */ + \
 317                                      1 /* stamp */ + \
 318                                      1 /* machinename.len */ + \
 319                                      XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
 320                                      1 /* uid */ + \
 321                                      1 /* gid */ + \
 322                                      1 /* gids.len (0) */)
 323 #define decode_create_session_maxsz  (op_decode_hdr_maxsz +     \
 324                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 325                                      1 /* csr_sequence */ + \
 326                                      1 /* csr_flags */ + \
 327                                      decode_channel_attrs_maxsz + \
 328                                      decode_channel_attrs_maxsz)
 329 #define encode_bind_conn_to_session_maxsz  (op_encode_hdr_maxsz + \
 330                                      /* bctsa_sessid */ \
 331                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 332                                      1 /* bctsa_dir */ + \
 333                                      1 /* bctsa_use_conn_in_rdma_mode */)
 334 #define decode_bind_conn_to_session_maxsz  (op_decode_hdr_maxsz +       \
 335                                      /* bctsr_sessid */ \
 336                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 337                                      1 /* bctsr_dir */ + \
 338                                      1 /* bctsr_use_conn_in_rdma_mode */)
 339 #define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
 340 #define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
 341 #define encode_destroy_clientid_maxsz   (op_encode_hdr_maxsz + 2)
 342 #define decode_destroy_clientid_maxsz   (op_decode_hdr_maxsz)
 343 #define encode_sequence_maxsz   (op_encode_hdr_maxsz + \
 344                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
 345 #define decode_sequence_maxsz   (op_decode_hdr_maxsz + \
 346                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
 347 #define encode_reclaim_complete_maxsz   (op_encode_hdr_maxsz + 4)
 348 #define decode_reclaim_complete_maxsz   (op_decode_hdr_maxsz + 4)
 349 #define encode_getdevicelist_maxsz (op_encode_hdr_maxsz + 4 + \
 350                                 encode_verifier_maxsz)
 351 #define decode_getdevicelist_maxsz (op_decode_hdr_maxsz + \
 352                                 2 /* nfs_cookie4 gdlr_cookie */ + \
 353                                 decode_verifier_maxsz \
 354                                   /* verifier4 gdlr_verifier */ + \
 355                                 1 /* gdlr_deviceid_list count */ + \
 356                                 XDR_QUADLEN(NFS4_PNFS_GETDEVLIST_MAXNUM * \
 357                                             NFS4_DEVICEID4_SIZE) \
 358                                   /* gdlr_deviceid_list */ + \
 359                                 1 /* bool gdlr_eof */)
 360 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + 4 + \
 361                                 XDR_QUADLEN(NFS4_DEVICEID4_SIZE))
 362 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
 363                                 1 /* layout type */ + \
 364                                 1 /* opaque devaddr4 length */ + \
 365                                   /* devaddr4 payload is read into page */ \
 366                                 1 /* notification bitmap length */ + \
 367                                 1 /* notification bitmap */)
 368 #define encode_layoutget_maxsz  (op_encode_hdr_maxsz + 10 + \
 369                                 encode_stateid_maxsz)
 370 #define decode_layoutget_maxsz  (op_decode_hdr_maxsz + 8 + \
 371                                 decode_stateid_maxsz + \
 372                                 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
 373 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz +          \
 374                                 2 /* offset */ + \
 375                                 2 /* length */ + \
 376                                 1 /* reclaim */ + \
 377                                 encode_stateid_maxsz + \
 378                                 1 /* new offset (true) */ + \
 379                                 2 /* last byte written */ + \
 380                                 1 /* nt_timechanged (false) */ + \
 381                                 1 /* layoutupdate4 layout type */ + \
 382                                 1 /* NULL filelayout layoutupdate4 payload */)
 383 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
 384 #define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
 385                                 encode_stateid_maxsz + \
 386                                 1 /* FIXME: opaque lrf_body always empty at the moment */)
 387 #define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
 388                                 1 + decode_stateid_maxsz)
 389 #define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
 390 #define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
 391 #define encode_test_stateid_maxsz       (op_encode_hdr_maxsz + 2 + \
 392                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 393 #define decode_test_stateid_maxsz       (op_decode_hdr_maxsz + 2 + 1)
 394 #define encode_free_stateid_maxsz       (op_encode_hdr_maxsz + 1 + \
 395                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 396 #define decode_free_stateid_maxsz       (op_decode_hdr_maxsz + 1)
 397 #else /* CONFIG_NFS_V4_1 */
 398 #define encode_sequence_maxsz   0
 399 #define decode_sequence_maxsz   0
 400 #endif /* CONFIG_NFS_V4_1 */
 401
 402 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 403 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 404 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 405                                 encode_sequence_maxsz + \
 406                                 encode_putfh_maxsz + \
 407                                 encode_read_maxsz)
 408 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 409                                 decode_sequence_maxsz + \
 410                                 decode_putfh_maxsz + \
 411                                 decode_read_maxsz)
 412 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 413                                 encode_sequence_maxsz + \
 414                                 encode_putfh_maxsz + \
 415                                 encode_readlink_maxsz)
 416 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 417                                 decode_sequence_maxsz + \
 418                                 decode_putfh_maxsz + \
 419                                 decode_readlink_maxsz)
 420 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 421                                 encode_sequence_maxsz + \
 422                                 encode_putfh_maxsz + \
 423                                 encode_readdir_maxsz)
 424 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 425                                 decode_sequence_maxsz + \
 426                                 decode_putfh_maxsz + \
 427                                 decode_readdir_maxsz)
 428 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 429                                 encode_sequence_maxsz + \
 430                                 encode_putfh_maxsz + \
 431                                 encode_write_maxsz + \
 432                                 encode_getattr_maxsz)
 433 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 434                                 decode_sequence_maxsz + \
 435                                 decode_putfh_maxsz + \
 436                                 decode_write_maxsz + \
 437                                 decode_getattr_maxsz)
 438 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 439                                 encode_sequence_maxsz + \
 440                                 encode_putfh_maxsz + \
 441                                 encode_commit_maxsz)
 442 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 443                                 decode_sequence_maxsz + \
 444                                 decode_putfh_maxsz + \
 445                                 decode_commit_maxsz)
 446 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 447                                 encode_sequence_maxsz + \
 448                                 encode_putfh_maxsz + \
 449                                 encode_open_maxsz + \
 450                                 encode_getfh_maxsz + \
 451                                 encode_getattr_maxsz)
 452 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 453                                 decode_sequence_maxsz + \
 454                                 decode_putfh_maxsz + \
 455                                 decode_open_maxsz + \
 456                                 decode_getfh_maxsz + \
 457                                 decode_getattr_maxsz)
 458 #define NFS4_enc_open_confirm_sz \
 459                                 (compound_encode_hdr_maxsz + \
 460                                  encode_putfh_maxsz + \
 461                                  encode_open_confirm_maxsz)
 462 #define NFS4_dec_open_confirm_sz \
 463                                 (compound_decode_hdr_maxsz + \
 464                                  decode_putfh_maxsz + \
 465                                  decode_open_confirm_maxsz)
 466 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 467                                         encode_sequence_maxsz + \
 468                                         encode_putfh_maxsz + \
 469                                         encode_open_maxsz + \
 470                                         encode_getattr_maxsz)
 471 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 472                                         decode_sequence_maxsz + \
 473                                         decode_putfh_maxsz + \
 474                                         decode_open_maxsz + \
 475                                         decode_getattr_maxsz)
 476 #define NFS4_enc_open_downgrade_sz \
 477                                 (compound_encode_hdr_maxsz + \
 478                                  encode_sequence_maxsz + \
 479                                  encode_putfh_maxsz + \
 480                                  encode_open_downgrade_maxsz + \
 481                                  encode_getattr_maxsz)
 482 #define NFS4_dec_open_downgrade_sz \
 483                                 (compound_decode_hdr_maxsz + \
 484                                  decode_sequence_maxsz + \
 485                                  decode_putfh_maxsz + \
 486                                  decode_open_downgrade_maxsz + \
 487                                  decode_getattr_maxsz)
 488 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 489                                  encode_sequence_maxsz + \
 490                                  encode_putfh_maxsz + \
 491                                  encode_close_maxsz + \
 492                                  encode_getattr_maxsz)
 493 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 494                                  decode_sequence_maxsz + \
 495                                  decode_putfh_maxsz + \
 496                                  decode_close_maxsz + \
 497                                  decode_getattr_maxsz)
 498 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 499                                  encode_sequence_maxsz + \
 500                                  encode_putfh_maxsz + \
 501                                  encode_setattr_maxsz + \
 502                                  encode_getattr_maxsz)
 503 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 504                                  decode_sequence_maxsz + \
 505                                  decode_putfh_maxsz + \
 506                                  decode_setattr_maxsz + \
 507                                  decode_getattr_maxsz)
 508 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 509                                 encode_sequence_maxsz + \
 510                                 encode_putfh_maxsz + \
 511                                 encode_fsinfo_maxsz)
 512 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 513                                 decode_sequence_maxsz + \
 514                                 decode_putfh_maxsz + \
 515                                 decode_fsinfo_maxsz)
 516 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 517                                 encode_renew_maxsz)
 518 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 519                                 decode_renew_maxsz)
 520 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 521                                 encode_setclientid_maxsz)
 522 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 523                                 decode_setclientid_maxsz)
 524 #define NFS4_enc_setclientid_confirm_sz \
 525                                 (compound_encode_hdr_maxsz + \
 526                                 encode_setclientid_confirm_maxsz + \
 527                                 encode_putrootfh_maxsz + \
 528                                 encode_fsinfo_maxsz)
 529 #define NFS4_dec_setclientid_confirm_sz \
 530                                 (compound_decode_hdr_maxsz + \
 531                                 decode_setclientid_confirm_maxsz + \
 532                                 decode_putrootfh_maxsz + \
 533                                 decode_fsinfo_maxsz)
 534 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 535                                 encode_sequence_maxsz + \
 536                                 encode_putfh_maxsz + \
 537                                 encode_lock_maxsz)
 538 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 539                                 decode_sequence_maxsz + \
 540                                 decode_putfh_maxsz + \
 541                                 decode_lock_maxsz)
 542 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 543                                 encode_sequence_maxsz + \
 544                                 encode_putfh_maxsz + \
 545                                 encode_lockt_maxsz)
 546 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 547                                  decode_sequence_maxsz + \
 548                                  decode_putfh_maxsz + \
 549                                  decode_lockt_maxsz)
 550 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 551                                 encode_sequence_maxsz + \
 552                                 encode_putfh_maxsz + \
 553                                 encode_locku_maxsz)
 554 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 555                                 decode_sequence_maxsz + \
 556                                 decode_putfh_maxsz + \
 557                                 decode_locku_maxsz)
 558 #define NFS4_enc_release_lockowner_sz \
 559                                 (compound_encode_hdr_maxsz + \
 560                                  encode_lockowner_maxsz)
 561 #define NFS4_dec_release_lockowner_sz \
 562                                 (compound_decode_hdr_maxsz + \
 563                                  decode_lockowner_maxsz)
 564 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 565                                 encode_sequence_maxsz + \
 566                                 encode_putfh_maxsz + \
 567                                 encode_access_maxsz + \
 568                                 encode_getattr_maxsz)
 569 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 570                                 decode_sequence_maxsz + \
 571                                 decode_putfh_maxsz + \
 572                                 decode_access_maxsz + \
 573                                 decode_getattr_maxsz)
 574 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 575                                 encode_sequence_maxsz + \
 576                                 encode_putfh_maxsz + \
 577                                 encode_getattr_maxsz)
 578 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 579                                 decode_sequence_maxsz + \
 580                                 decode_putfh_maxsz + \
 581                                 decode_getattr_maxsz)
 582 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 583                                 encode_sequence_maxsz + \
 584                                 encode_putfh_maxsz + \
 585                                 encode_lookup_maxsz + \
 586                                 encode_getattr_maxsz + \
 587                                 encode_getfh_maxsz)
 588 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 589                                 decode_sequence_maxsz + \
 590                                 decode_putfh_maxsz + \
 591                                 decode_lookup_maxsz + \
 592                                 decode_getattr_maxsz + \
 593                                 decode_getfh_maxsz)
 594 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 595                                 encode_sequence_maxsz + \
 596                                 encode_putrootfh_maxsz + \
 597                                 encode_getattr_maxsz + \
 598                                 encode_getfh_maxsz)
 599 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 600                                 decode_sequence_maxsz + \
 601                                 decode_putrootfh_maxsz + \
 602                                 decode_getattr_maxsz + \
 603                                 decode_getfh_maxsz)
 604 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 605                                 encode_sequence_maxsz + \
 606                                 encode_putfh_maxsz + \
 607                                 encode_remove_maxsz)
 608 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 609                                 decode_sequence_maxsz + \
 610                                 decode_putfh_maxsz + \
 611                                 decode_remove_maxsz)
 612 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 613                                 encode_sequence_maxsz + \
 614                                 encode_putfh_maxsz + \
 615                                 encode_savefh_maxsz + \
 616                                 encode_putfh_maxsz + \
 617                                 encode_rename_maxsz)
 618 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 619                                 decode_sequence_maxsz + \
 620                                 decode_putfh_maxsz + \
 621                                 decode_savefh_maxsz + \
 622                                 decode_putfh_maxsz + \
 623                                 decode_rename_maxsz)
 624 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 625                                 encode_sequence_maxsz + \
 626                                 encode_putfh_maxsz + \
 627                                 encode_savefh_maxsz + \
 628                                 encode_putfh_maxsz + \
 629                                 encode_link_maxsz + \
 630                                 encode_restorefh_maxsz + \
 631                                 encode_getattr_maxsz)
 632 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 633                                 decode_sequence_maxsz + \
 634                                 decode_putfh_maxsz + \
 635                                 decode_savefh_maxsz + \
 636                                 decode_putfh_maxsz + \
 637                                 decode_link_maxsz + \
 638                                 decode_restorefh_maxsz + \
 639                                 decode_getattr_maxsz)
 640 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 641                                 encode_sequence_maxsz + \
 642                                 encode_putfh_maxsz + \
 643                                 encode_symlink_maxsz + \
 644                                 encode_getattr_maxsz + \
 645                                 encode_getfh_maxsz)
 646 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 647                                 decode_sequence_maxsz + \
 648                                 decode_putfh_maxsz + \
 649                                 decode_symlink_maxsz + \
 650                                 decode_getattr_maxsz + \
 651                                 decode_getfh_maxsz)
 652 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 653                                 encode_sequence_maxsz + \
 654                                 encode_putfh_maxsz + \
 655                                 encode_create_maxsz + \
 656                                 encode_getfh_maxsz + \
 657                                 encode_getattr_maxsz)
 658 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 659                                 decode_sequence_maxsz + \
 660                                 decode_putfh_maxsz + \
 661                                 decode_create_maxsz + \
 662                                 decode_getfh_maxsz + \
 663                                 decode_getattr_maxsz)
 664 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 665                                 encode_sequence_maxsz + \
 666                                 encode_putfh_maxsz + \
 667                                 encode_getattr_maxsz)
 668 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 669                                 decode_sequence_maxsz + \
 670                                 decode_putfh_maxsz + \
 671                                 decode_getattr_maxsz)
 672 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 673                                 encode_sequence_maxsz + \
 674                                 encode_putfh_maxsz + \
 675                                 encode_statfs_maxsz)
 676 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 677                                 decode_sequence_maxsz + \
 678                                 decode_putfh_maxsz + \
 679                                 decode_statfs_maxsz)
 680 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 681                                 encode_sequence_maxsz + \
 682                                 encode_putfh_maxsz + \
 683                                 encode_getattr_maxsz)
 684 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 685                                 decode_sequence_maxsz + \
 686                                 decode_putfh_maxsz + \
 687                                 decode_getattr_maxsz)
 688 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 689                                 encode_sequence_maxsz + \
 690                                 encode_putfh_maxsz + \
 691                                 encode_delegreturn_maxsz + \
 692                                 encode_getattr_maxsz)
 693 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 694                                 decode_sequence_maxsz + \
 695                                 decode_delegreturn_maxsz + \
 696                                 decode_getattr_maxsz)
 697 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 698                                 encode_sequence_maxsz + \
 699                                 encode_putfh_maxsz + \
 700                                 encode_getacl_maxsz)
 701 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 702                                 decode_sequence_maxsz + \
 703                                 decode_putfh_maxsz + \
 704                                 decode_getacl_maxsz)
 705 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 706                                 encode_sequence_maxsz + \
 707                                 encode_putfh_maxsz + \
 708                                 encode_setacl_maxsz)
 709 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 710                                 decode_sequence_maxsz + \
 711                                 decode_putfh_maxsz + \
 712                                 decode_setacl_maxsz)
 713 #define NFS4_enc_fs_locations_sz \
 714                                 (compound_encode_hdr_maxsz + \
 715                                  encode_sequence_maxsz + \
 716                                  encode_putfh_maxsz + \
 717                                  encode_lookup_maxsz + \
 718                                  encode_fs_locations_maxsz)
 719 #define NFS4_dec_fs_locations_sz \
 720                                 (compound_decode_hdr_maxsz + \
 721                                  decode_sequence_maxsz + \
 722                                  decode_putfh_maxsz + \
 723                                  decode_lookup_maxsz + \
 724                                  decode_fs_locations_maxsz)
 725 #define NFS4_enc_secinfo_sz     (compound_encode_hdr_maxsz + \
 726                                 encode_sequence_maxsz + \
 727                                 encode_putfh_maxsz + \
 728                                 encode_secinfo_maxsz)
 729 #define NFS4_dec_secinfo_sz     (compound_decode_hdr_maxsz + \
 730                                 decode_sequence_maxsz + \
 731                                 decode_putfh_maxsz + \
 732                                 decode_secinfo_maxsz)
 733 #if defined(CONFIG_NFS_V4_1)
 734 #define NFS4_enc_bind_conn_to_session_sz \
 735                                 (compound_encode_hdr_maxsz + \
 736                                  encode_bind_conn_to_session_maxsz)
 737 #define NFS4_dec_bind_conn_to_session_sz \
 738                                 (compound_decode_hdr_maxsz + \
 739                                  decode_bind_conn_to_session_maxsz)
 740 #define NFS4_enc_exchange_id_sz \
 741                                 (compound_encode_hdr_maxsz + \
 742                                  encode_exchange_id_maxsz)
 743 #define NFS4_dec_exchange_id_sz \
 744                                 (compound_decode_hdr_maxsz + \
 745                                  decode_exchange_id_maxsz)
 746 #define NFS4_enc_create_session_sz \
 747                                 (compound_encode_hdr_maxsz + \
 748                                  encode_create_session_maxsz)
 749 #define NFS4_dec_create_session_sz \
 750                                 (compound_decode_hdr_maxsz + \
 751                                  decode_create_session_maxsz)
 752 #define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
 753                                          encode_destroy_session_maxsz)
 754 #define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
 755                                          decode_destroy_session_maxsz)
 756 #define NFS4_enc_destroy_clientid_sz    (compound_encode_hdr_maxsz + \
 757                                          encode_destroy_clientid_maxsz)
 758 #define NFS4_dec_destroy_clientid_sz    (compound_decode_hdr_maxsz + \
 759                                          decode_destroy_clientid_maxsz)
 760 #define NFS4_enc_sequence_sz \
 761                                 (compound_decode_hdr_maxsz + \
 762                                  encode_sequence_maxsz)
 763 #define NFS4_dec_sequence_sz \
 764                                 (compound_decode_hdr_maxsz + \
 765                                  decode_sequence_maxsz)
 766 #define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
 767                                          encode_sequence_maxsz + \
 768                                          encode_putrootfh_maxsz + \
 769                                          encode_fsinfo_maxsz)
 770 #define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
 771                                          decode_sequence_maxsz + \
 772                                          decode_putrootfh_maxsz + \
 773                                          decode_fsinfo_maxsz)
 774 #define NFS4_enc_reclaim_complete_sz    (compound_encode_hdr_maxsz + \
 775                                          encode_sequence_maxsz + \
 776                                          encode_reclaim_complete_maxsz)
 777 #define NFS4_dec_reclaim_complete_sz    (compound_decode_hdr_maxsz + \
 778                                          decode_sequence_maxsz + \
 779                                          decode_reclaim_complete_maxsz)
 780 #define NFS4_enc_getdevicelist_sz (compound_encode_hdr_maxsz + \
 781                                 encode_sequence_maxsz + \
 782                                 encode_putfh_maxsz + \
 783                                 encode_getdevicelist_maxsz)
 784 #define NFS4_dec_getdevicelist_sz (compound_decode_hdr_maxsz + \
 785                                 decode_sequence_maxsz + \
 786                                 decode_putfh_maxsz + \
 787                                 decode_getdevicelist_maxsz)
 788 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
 789                                 encode_sequence_maxsz +\
 790                                 encode_getdeviceinfo_maxsz)
 791 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
 792                                 decode_sequence_maxsz + \
 793                                 decode_getdeviceinfo_maxsz)
 794 #define NFS4_enc_layoutget_sz   (compound_encode_hdr_maxsz + \
 795                                 encode_sequence_maxsz + \
 796                                 encode_putfh_maxsz +        \
 797                                 encode_layoutget_maxsz)
 798 #define NFS4_dec_layoutget_sz   (compound_decode_hdr_maxsz + \
 799                                 decode_sequence_maxsz + \
 800                                 decode_putfh_maxsz +        \
 801                                 decode_layoutget_maxsz)
 802 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
 803                                 encode_sequence_maxsz +\
 804                                 encode_putfh_maxsz + \
 805                                 encode_layoutcommit_maxsz + \
 806                                 encode_getattr_maxsz)
 807 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
 808                                 decode_sequence_maxsz + \
 809                                 decode_putfh_maxsz + \
 810                                 decode_layoutcommit_maxsz + \
 811                                 decode_getattr_maxsz)
 812 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
 813                                 encode_sequence_maxsz + \
 814                                 encode_putfh_maxsz + \
 815                                 encode_layoutreturn_maxsz)
 816 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
 817                                 decode_sequence_maxsz + \
 818                                 decode_putfh_maxsz + \
 819                                 decode_layoutreturn_maxsz)
 820 #define NFS4_enc_secinfo_no_name_sz     (compound_encode_hdr_maxsz + \
 821                                         encode_sequence_maxsz + \
 822                                         encode_putrootfh_maxsz +\
 823                                         encode_secinfo_no_name_maxsz)
 824 #define NFS4_dec_secinfo_no_name_sz     (compound_decode_hdr_maxsz + \
 825                                         decode_sequence_maxsz + \
 826                                         decode_putrootfh_maxsz + \
 827                                         decode_secinfo_no_name_maxsz)
 828 #define NFS4_enc_test_stateid_sz        (compound_encode_hdr_maxsz + \
 829                                          encode_sequence_maxsz + \
 830                                          encode_test_stateid_maxsz)
 831 #define NFS4_dec_test_stateid_sz        (compound_decode_hdr_maxsz + \
 832                                          decode_sequence_maxsz + \
 833                                          decode_test_stateid_maxsz)
 834 #define NFS4_enc_free_stateid_sz        (compound_encode_hdr_maxsz + \
 835                                          encode_sequence_maxsz + \
 836                                          encode_free_stateid_maxsz)
 837 #define NFS4_dec_free_stateid_sz        (compound_decode_hdr_maxsz + \
 838                                          decode_sequence_maxsz + \
 839                                          decode_free_stateid_maxsz)
 840
 841 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 842                                       compound_encode_hdr_maxsz +
 843                                       encode_sequence_maxsz +
 844                                       encode_putfh_maxsz +
 845                                       encode_getattr_maxsz) *
 846                                      XDR_UNIT);
 847
 848 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 849                                      compound_decode_hdr_maxsz +
 850                                      decode_sequence_maxsz +
 851                                      decode_putfh_maxsz) *
 852                                     XDR_UNIT);
 853 #endif /* CONFIG_NFS_V4_1 */
 854
 855 static unsigned short send_implementation_id = 1;
 856
 857 module_param(send_implementation_id, ushort, 0644);
 858 MODULE_PARM_DESC(send_implementation_id,
 859                 "Send implementation ID with NFSv4.1 exchange_id");
 860
 861 static const umode_t nfs_type2fmt[] = {
 862         [NF4BAD] = 0,
 863         [NF4REG] = S_IFREG,
 864         [NF4DIR] = S_IFDIR,
 865         [NF4BLK] = S_IFBLK,
 866         [NF4CHR] = S_IFCHR,
 867         [NF4LNK] = S_IFLNK,
 868         [NF4SOCK] = S_IFSOCK,
 869         [NF4FIFO] = S_IFIFO,
 870         [NF4ATTRDIR] = 0,
 871         [NF4NAMEDATTR] = 0,
 872 };
 873
 874 struct compound_hdr {
 875         int32_t         status;
 876         uint32_t        nops;
 877         __be32 *        nops_p;
 878         uint32_t        taglen;
 879         char *          tag;
 880         uint32_t        replen;         /* expected reply words */
 881         u32             minorversion;
 882 };
 883
 884 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
 885 {
 886         __be32 *p = xdr_reserve_space(xdr, nbytes);
 887         BUG_ON(!p);
 888         return p;
 889 }
 890
 891 static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
 892 {
 893         __be32 *p;
 894
 895         p = xdr_reserve_space(xdr, len);
 896         xdr_encode_opaque_fixed(p, buf, len);
 897 }
 898
 899 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 900 {
 901         __be32 *p;
 902
 903         p = reserve_space(xdr, 4 + len);
 904         xdr_encode_opaque(p, str, len);
 905 }
 906
 907 static void encode_uint32(struct xdr_stream *xdr, u32 n)
 908 {
 909         __be32 *p;
 910
 911         p = reserve_space(xdr, 4);
 912         *p = cpu_to_be32(n);
 913 }
 914
 915 static void encode_uint64(struct xdr_stream *xdr, u64 n)
 916 {
 917         __be32 *p;
 918
 919         p = reserve_space(xdr, 8);
 920         xdr_encode_hyper(p, n);
 921 }
 922
 923 static void encode_nfs4_seqid(struct xdr_stream *xdr,
 924                 const struct nfs_seqid *seqid)
 925 {
 926         encode_uint32(xdr, seqid->sequence->counter);
 927 }
 928
 929 static void encode_compound_hdr(struct xdr_stream *xdr,
 930                                 struct rpc_rqst *req,
 931                                 struct compound_hdr *hdr)
 932 {
 933         __be32 *p;
 934         struct rpc_auth *auth = req->rq_cred->cr_auth;
 935
 936         /* initialize running count of expected bytes in reply.
 937          * NOTE: the replied tag SHOULD be the same is the one sent,
 938          * but this is not required as a MUST for the server to do so. */
 939         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
 940
 941         BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
 942         encode_string(xdr, hdr->taglen, hdr->tag);
 943         p = reserve_space(xdr, 8);
 944         *p++ = cpu_to_be32(hdr->minorversion);
 945         hdr->nops_p = p;
 946         *p = cpu_to_be32(hdr->nops);
 947 }
 948
 949 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
 950                 uint32_t replen,
 951                 struct compound_hdr *hdr)
 952 {
 953         encode_uint32(xdr, op);
 954         hdr->nops++;
 955         hdr->replen += replen;
 956 }
 957
 958 static void encode_nops(struct compound_hdr *hdr)
 959 {
 960         BUG_ON(hdr->nops > NFS4_MAX_OPS);
 961         *hdr->nops_p = htonl(hdr->nops);
 962 }
 963
 964 static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
 965 {
 966         encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
 967 }
 968
 969 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 970 {
 971         encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
 972 }
 973
 974 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
 975 {
 976         char owner_name[IDMAP_NAMESZ];
 977         char owner_group[IDMAP_NAMESZ];
 978         int owner_namelen = 0;
 979         int owner_grouplen = 0;
 980         __be32 *p;
 981         __be32 *q;
 982         int len;
 983         uint32_t bmval0 = 0;
 984         uint32_t bmval1 = 0;
 985
 986         /*
 987          * We reserve enough space to write the entire attribute buffer at once.
 988          * In the worst-case, this would be
 989          *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
 990          *          = 36 bytes, plus any contribution from variable-length fields
 991          *            such as owner/group.
 992          */
 993         len = 16;
 994
 995         /* Sigh */
 996         if (iap->ia_valid & ATTR_SIZE)
 997                 len += 8;
 998         if (iap->ia_valid & ATTR_MODE)
 999                 len += 4;
1000         if (iap->ia_valid & ATTR_UID) {
1001                 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1002                 if (owner_namelen < 0) {
1003                         dprintk("nfs: couldn't resolve uid %d to string\n",
1004                                         iap->ia_uid);
1005                         /* XXX */
1006                         strcpy(owner_name, "nobody");
1007                         owner_namelen = sizeof("nobody") - 1;
1008                         /* goto out; */
1009                 }
1010                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1011         }
1012         if (iap->ia_valid & ATTR_GID) {
1013                 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1014                 if (owner_grouplen < 0) {
1015                         dprintk("nfs: couldn't resolve gid %d to string\n",
1016                                         iap->ia_gid);
1017                         strcpy(owner_group, "nobody");
1018                         owner_grouplen = sizeof("nobody") - 1;
1019                         /* goto out; */
1020                 }
1021                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1022         }
1023         if (iap->ia_valid & ATTR_ATIME_SET)
1024                 len += 16;
1025         else if (iap->ia_valid & ATTR_ATIME)
1026                 len += 4;
1027         if (iap->ia_valid & ATTR_MTIME_SET)
1028                 len += 16;
1029         else if (iap->ia_valid & ATTR_MTIME)
1030                 len += 4;
1031         p = reserve_space(xdr, len);
1032
1033         /*
1034          * We write the bitmap length now, but leave the bitmap and the attribute
1035          * buffer length to be backfilled at the end of this routine.
1036          */
1037         *p++ = cpu_to_be32(2);
1038         q = p;
1039         p += 3;
1040
1041         if (iap->ia_valid & ATTR_SIZE) {
1042                 bmval0 |= FATTR4_WORD0_SIZE;
1043                 p = xdr_encode_hyper(p, iap->ia_size);
1044         }
1045         if (iap->ia_valid & ATTR_MODE) {
1046                 bmval1 |= FATTR4_WORD1_MODE;
1047                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1048         }
1049         if (iap->ia_valid & ATTR_UID) {
1050                 bmval1 |= FATTR4_WORD1_OWNER;
1051                 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1052         }
1053         if (iap->ia_valid & ATTR_GID) {
1054                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
1055                 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1056         }
1057         if (iap->ia_valid & ATTR_ATIME_SET) {
1058                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
1059                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1060                 *p++ = cpu_to_be32(0);
1061                 *p++ = cpu_to_be32(iap->ia_atime.tv_sec);
1062                 *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
1063         }
1064         else if (iap->ia_valid & ATTR_ATIME) {
1065                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
1066                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1067         }
1068         if (iap->ia_valid & ATTR_MTIME_SET) {
1069                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
1070                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1071                 *p++ = cpu_to_be32(0);
1072                 *p++ = cpu_to_be32(iap->ia_mtime.tv_sec);
1073                 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1074         }
1075         else if (iap->ia_valid & ATTR_MTIME) {
1076                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
1077                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1078         }
1079
1080         /*
1081          * Now we backfill the bitmap and the attribute buffer length.
1082          */
1083         if (len != ((char *)p - (char *)q) + 4) {
1084                 printk(KERN_ERR "NFS: Attr length error, %u != %Zu\n",
1085                                 len, ((char *)p - (char *)q) + 4);
1086                 BUG();
1087         }
1088         len = (char *)p - (char *)q - 12;
1089         *q++ = htonl(bmval0);
1090         *q++ = htonl(bmval1);
1091         *q = htonl(len);
1092
1093 /* out: */
1094 }
1095
1096 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1097 {
1098         encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1099         encode_uint32(xdr, access);
1100 }
1101
1102 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1103 {
1104         encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1105         encode_nfs4_seqid(xdr, arg->seqid);
1106         encode_nfs4_stateid(xdr, arg->stateid);
1107 }
1108
1109 static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1110 {
1111         __be32 *p;
1112
1113         encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1114         p = reserve_space(xdr, 12);
1115         p = xdr_encode_hyper(p, args->offset);
1116         *p = cpu_to_be32(args->count);
1117 }
1118
1119 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1120 {
1121         __be32 *p;
1122
1123         encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1124         encode_uint32(xdr, create->ftype);
1125
1126         switch (create->ftype) {
1127         case NF4LNK:
1128                 p = reserve_space(xdr, 4);
1129                 *p = cpu_to_be32(create->u.symlink.len);
1130                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
1131                 break;
1132
1133         case NF4BLK: case NF4CHR:
1134                 p = reserve_space(xdr, 8);
1135                 *p++ = cpu_to_be32(create->u.device.specdata1);
1136                 *p = cpu_to_be32(create->u.device.specdata2);
1137                 break;
1138
1139         default:
1140                 break;
1141         }
1142
1143         encode_string(xdr, create->name->len, create->name->name);
1144         encode_attrs(xdr, create->attrs, create->server);
1145 }
1146
1147 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1148 {
1149         __be32 *p;
1150
1151         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1152         p = reserve_space(xdr, 8);
1153         *p++ = cpu_to_be32(1);
1154         *p = cpu_to_be32(bitmap);
1155 }
1156
1157 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1158 {
1159         __be32 *p;
1160
1161         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1162         p = reserve_space(xdr, 12);
1163         *p++ = cpu_to_be32(2);
1164         *p++ = cpu_to_be32(bm0);
1165         *p = cpu_to_be32(bm1);
1166 }
1167
1168 static void
1169 encode_getattr_three(struct xdr_stream *xdr,
1170                      uint32_t bm0, uint32_t bm1, uint32_t bm2,
1171                      struct compound_hdr *hdr)
1172 {
1173         __be32 *p;
1174
1175         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1176         if (bm2) {
1177                 p = reserve_space(xdr, 16);
1178                 *p++ = cpu_to_be32(3);
1179                 *p++ = cpu_to_be32(bm0);
1180                 *p++ = cpu_to_be32(bm1);
1181                 *p = cpu_to_be32(bm2);
1182         } else if (bm1) {
1183                 p = reserve_space(xdr, 12);
1184                 *p++ = cpu_to_be32(2);
1185                 *p++ = cpu_to_be32(bm0);
1186                 *p = cpu_to_be32(bm1);
1187         } else {
1188                 p = reserve_space(xdr, 8);
1189                 *p++ = cpu_to_be32(1);
1190                 *p = cpu_to_be32(bm0);
1191         }
1192 }
1193
1194 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1195 {
1196         encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1197                            bitmask[1] & nfs4_fattr_bitmap[1], hdr);
1198 }
1199
1200 static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1201                                  const u32 *open_bitmap,
1202                                  struct compound_hdr *hdr)
1203 {
1204         encode_getattr_three(xdr,
1205                              bitmask[0] & open_bitmap[0],
1206                              bitmask[1] & open_bitmap[1],
1207                              bitmask[2] & open_bitmap[2],
1208                              hdr);
1209 }
1210
1211 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1212 {
1213         encode_getattr_three(xdr,
1214                              bitmask[0] & nfs4_fsinfo_bitmap[0],
1215                              bitmask[1] & nfs4_fsinfo_bitmap[1],
1216                              bitmask[2] & nfs4_fsinfo_bitmap[2],
1217                              hdr);
1218 }
1219
1220 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1221 {
1222         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1223                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1224 }
1225
1226 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1227 {
1228         encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1229 }
1230
1231 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1232 {
1233         encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1234         encode_string(xdr, name->len, name->name);
1235 }
1236
1237 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1238 {
1239         if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
1240                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1241         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1242 }
1243
1244 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1245 {
1246         if (fl->fl_end == OFFSET_MAX)
1247                 return ~(uint64_t)0;
1248         return fl->fl_end - fl->fl_start + 1;
1249 }
1250
1251 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1252 {
1253         __be32 *p;
1254
1255         p = reserve_space(xdr, 32);
1256         p = xdr_encode_hyper(p, lowner->clientid);
1257         *p++ = cpu_to_be32(20);
1258         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1259         *p++ = cpu_to_be32(lowner->s_dev);
1260         xdr_encode_hyper(p, lowner->id);
1261 }
1262
1263 /*
1264  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1265  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1266  */
1267 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1268 {
1269         __be32 *p;
1270
1271         encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1272         p = reserve_space(xdr, 28);
1273         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1274         *p++ = cpu_to_be32(args->reclaim);
1275         p = xdr_encode_hyper(p, args->fl->fl_start);
1276         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1277         *p = cpu_to_be32(args->new_lock_owner);
1278         if (args->new_lock_owner){
1279                 encode_nfs4_seqid(xdr, args->open_seqid);
1280                 encode_nfs4_stateid(xdr, args->open_stateid);
1281                 encode_nfs4_seqid(xdr, args->lock_seqid);
1282                 encode_lockowner(xdr, &args->lock_owner);
1283         }
1284         else {
1285                 encode_nfs4_stateid(xdr, args->lock_stateid);
1286                 encode_nfs4_seqid(xdr, args->lock_seqid);
1287         }
1288 }
1289
1290 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1291 {
1292         __be32 *p;
1293
1294         encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1295         p = reserve_space(xdr, 20);
1296         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1297         p = xdr_encode_hyper(p, args->fl->fl_start);
1298         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1299         encode_lockowner(xdr, &args->lock_owner);
1300 }
1301
1302 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1303 {
1304         __be32 *p;
1305
1306         encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1307         encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1308         encode_nfs4_seqid(xdr, args->seqid);
1309         encode_nfs4_stateid(xdr, args->stateid);
1310         p = reserve_space(xdr, 16);
1311         p = xdr_encode_hyper(p, args->fl->fl_start);
1312         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1313 }
1314
1315 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1316 {
1317         encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1318         encode_lockowner(xdr, lowner);
1319 }
1320
1321 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1322 {
1323         encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1324         encode_string(xdr, name->len, name->name);
1325 }
1326
1327 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1328 {
1329         __be32 *p;
1330
1331         p = reserve_space(xdr, 8);
1332         switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1333         case FMODE_READ:
1334                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1335                 break;
1336         case FMODE_WRITE:
1337                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1338                 break;
1339         case FMODE_READ|FMODE_WRITE:
1340                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1341                 break;
1342         default:
1343                 *p++ = cpu_to_be32(0);
1344         }
1345         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1346 }
1347
1348 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1349 {
1350         __be32 *p;
1351  /*
1352  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1353  * owner 4 = 32
1354  */
1355         encode_nfs4_seqid(xdr, arg->seqid);
1356         encode_share_access(xdr, arg->fmode);
1357         p = reserve_space(xdr, 36);
1358         p = xdr_encode_hyper(p, arg->clientid);
1359         *p++ = cpu_to_be32(24);
1360         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1361         *p++ = cpu_to_be32(arg->server->s_dev);
1362         *p++ = cpu_to_be32(arg->id.uniquifier);
1363         xdr_encode_hyper(p, arg->id.create_time);
1364 }
1365
1366 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1367 {
1368         __be32 *p;
1369         struct nfs_client *clp;
1370
1371         p = reserve_space(xdr, 4);
1372         switch(arg->open_flags & O_EXCL) {
1373         case 0:
1374                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1375                 encode_attrs(xdr, arg->u.attrs, arg->server);
1376                 break;
1377         default:
1378                 clp = arg->server->nfs_client;
1379                 if (clp->cl_mvops->minor_version > 0) {
1380                         if (nfs4_has_persistent_session(clp)) {
1381                                 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1382                                 encode_attrs(xdr, arg->u.attrs, arg->server);
1383                         } else {
1384                                 struct iattr dummy;
1385
1386                                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1387                                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1388                                 dummy.ia_valid = 0;
1389                                 encode_attrs(xdr, &dummy, arg->server);
1390                         }
1391                 } else {
1392                         *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1393                         encode_nfs4_verifier(xdr, &arg->u.verifier);
1394                 }
1395         }
1396 }
1397
1398 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1399 {
1400         __be32 *p;
1401
1402         p = reserve_space(xdr, 4);
1403         switch (arg->open_flags & O_CREAT) {
1404         case 0:
1405                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1406                 break;
1407         default:
1408                 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1409                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1410                 encode_createmode(xdr, arg);
1411         }
1412 }
1413
1414 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1415 {
1416         __be32 *p;
1417
1418         p = reserve_space(xdr, 4);
1419         switch (delegation_type) {
1420         case 0:
1421                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1422                 break;
1423         case FMODE_READ:
1424                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1425                 break;
1426         case FMODE_WRITE|FMODE_READ:
1427                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1428                 break;
1429         default:
1430                 BUG();
1431         }
1432 }
1433
1434 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1435 {
1436         __be32 *p;
1437
1438         p = reserve_space(xdr, 4);
1439         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1440         encode_string(xdr, name->len, name->name);
1441 }
1442
1443 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1444 {
1445         __be32 *p;
1446
1447         p = reserve_space(xdr, 4);
1448         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1449         encode_delegation_type(xdr, type);
1450 }
1451
1452 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1453 {
1454         __be32 *p;
1455
1456         p = reserve_space(xdr, 4);
1457         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1458         encode_nfs4_stateid(xdr, stateid);
1459         encode_string(xdr, name->len, name->name);
1460 }
1461
1462 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1463 {
1464         encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1465         encode_openhdr(xdr, arg);
1466         encode_opentype(xdr, arg);
1467         switch (arg->claim) {
1468         case NFS4_OPEN_CLAIM_NULL:
1469                 encode_claim_null(xdr, arg->name);
1470                 break;
1471         case NFS4_OPEN_CLAIM_PREVIOUS:
1472                 encode_claim_previous(xdr, arg->u.delegation_type);
1473                 break;
1474         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1475                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1476                 break;
1477         default:
1478                 BUG();
1479         }
1480 }
1481
1482 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1483 {
1484         encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1485         encode_nfs4_stateid(xdr, arg->stateid);
1486         encode_nfs4_seqid(xdr, arg->seqid);
1487 }
1488
1489 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1490 {
1491         encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1492         encode_nfs4_stateid(xdr, arg->stateid);
1493         encode_nfs4_seqid(xdr, arg->seqid);
1494         encode_share_access(xdr, arg->fmode);
1495 }
1496
1497 static void
1498 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1499 {
1500         encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1501         encode_string(xdr, fh->size, fh->data);
1502 }
1503
1504 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1505 {
1506         encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1507 }
1508
1509 static void encode_open_stateid(struct xdr_stream *xdr,
1510                 const struct nfs_open_context *ctx,
1511                 const struct nfs_lock_context *l_ctx,
1512                 fmode_t fmode,
1513                 int zero_seqid)
1514 {
1515         nfs4_stateid stateid;
1516
1517         if (ctx->state != NULL) {
1518                 nfs4_select_rw_stateid(&stateid, ctx->state,
1519                                 fmode, l_ctx->lockowner, l_ctx->pid);
1520                 if (zero_seqid)
1521                         stateid.seqid = 0;
1522                 encode_nfs4_stateid(xdr, &stateid);
1523         } else
1524                 encode_nfs4_stateid(xdr, &zero_stateid);
1525 }
1526
1527 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1528 {
1529         __be32 *p;
1530
1531         encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1532         encode_open_stateid(xdr, args->context, args->lock_context,
1533                         FMODE_READ, hdr->minorversion);
1534
1535         p = reserve_space(xdr, 12);
1536         p = xdr_encode_hyper(p, args->offset);
1537         *p = cpu_to_be32(args->count);
1538 }
1539
1540 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1541 {
1542         uint32_t attrs[2] = {
1543                 FATTR4_WORD0_RDATTR_ERROR,
1544                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1545         };
1546         uint32_t dircount = readdir->count >> 1;
1547         __be32 *p, verf[2];
1548
1549         if (readdir->plus) {
1550                 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1551                         FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1552                 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1553                         FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1554                         FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1555                         FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1556                 dircount >>= 1;
1557         }
1558         /* Use mounted_on_fileid only if the server supports it */
1559         if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1560                 attrs[0] |= FATTR4_WORD0_FILEID;
1561
1562         encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1563         encode_uint64(xdr, readdir->cookie);
1564         encode_nfs4_verifier(xdr, &readdir->verifier);
1565         p = reserve_space(xdr, 20);
1566         *p++ = cpu_to_be32(dircount);
1567         *p++ = cpu_to_be32(readdir->count);
1568         *p++ = cpu_to_be32(2);
1569
1570         *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1571         *p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1572         memcpy(verf, readdir->verifier.data, sizeof(verf));
1573         dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1574                         __func__,
1575                         (unsigned long long)readdir->cookie,
1576                         verf[0], verf[1],
1577                         attrs[0] & readdir->bitmask[0],
1578                         attrs[1] & readdir->bitmask[1]);
1579 }
1580
1581 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1582 {
1583         encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1584 }
1585
1586 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1587 {
1588         encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1589         encode_string(xdr, name->len, name->name);
1590 }
1591
1592 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1593 {
1594         encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1595         encode_string(xdr, oldname->len, oldname->name);
1596         encode_string(xdr, newname->len, newname->name);
1597 }
1598
1599 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1600                          struct compound_hdr *hdr)
1601 {
1602         encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1603         encode_uint64(xdr, clid);
1604 }
1605
1606 static void
1607 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1608 {
1609         encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1610 }
1611
1612 static void
1613 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1614 {
1615         __be32 *p;
1616
1617         encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1618         encode_nfs4_stateid(xdr, &zero_stateid);
1619         p = reserve_space(xdr, 2*4);
1620         *p++ = cpu_to_be32(1);
1621         *p = cpu_to_be32(FATTR4_WORD0_ACL);
1622         BUG_ON(arg->acl_len % 4);
1623         p = reserve_space(xdr, 4);
1624         *p = cpu_to_be32(arg->acl_len);
1625         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1626 }
1627
1628 static void
1629 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1630 {
1631         encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1632 }
1633
1634 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1635 {
1636         encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1637         encode_nfs4_stateid(xdr, &arg->stateid);
1638         encode_attrs(xdr, arg->iap, server);
1639 }
1640
1641 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1642 {
1643         __be32 *p;
1644
1645         encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1646         encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1647
1648         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1649         p = reserve_space(xdr, 4);
1650         *p = cpu_to_be32(setclientid->sc_prog);
1651         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1652         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1653         p = reserve_space(xdr, 4);
1654         *p = cpu_to_be32(setclientid->sc_cb_ident);
1655 }
1656
1657 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1658 {
1659         encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1660                         decode_setclientid_confirm_maxsz, hdr);
1661         encode_uint64(xdr, arg->clientid);
1662         encode_nfs4_verifier(xdr, &arg->confirm);
1663 }
1664
1665 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1666 {
1667         __be32 *p;
1668
1669         encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1670         encode_open_stateid(xdr, args->context, args->lock_context,
1671                         FMODE_WRITE, hdr->minorversion);
1672
1673         p = reserve_space(xdr, 16);
1674         p = xdr_encode_hyper(p, args->offset);
1675         *p++ = cpu_to_be32(args->stable);
1676         *p = cpu_to_be32(args->count);
1677
1678         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1679 }
1680
1681 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1682 {
1683         encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1684         encode_nfs4_stateid(xdr, stateid);
1685 }
1686
1687 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1688 {
1689         encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1690         encode_string(xdr, name->len, name->name);
1691 }
1692
1693 #if defined(CONFIG_NFS_V4_1)
1694 /* NFSv4.1 operations */
1695 static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1696                                    struct nfs4_session *session,
1697                                    struct compound_hdr *hdr)
1698 {
1699         __be32 *p;
1700
1701         encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1702                 decode_bind_conn_to_session_maxsz, hdr);
1703         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1704         p = xdr_reserve_space(xdr, 8);
1705         *p++ = cpu_to_be32(NFS4_CDFC4_BACK_OR_BOTH);
1706         *p = 0; /* use_conn_in_rdma_mode = False */
1707 }
1708
1709 static void encode_exchange_id(struct xdr_stream *xdr,
1710                                struct nfs41_exchange_id_args *args,
1711                                struct compound_hdr *hdr)
1712 {
1713         __be32 *p;
1714         char impl_name[NFS4_OPAQUE_LIMIT];
1715         int len = 0;
1716
1717         encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1718         encode_nfs4_verifier(xdr, args->verifier);
1719
1720         encode_string(xdr, args->id_len, args->id);
1721
1722         p = reserve_space(xdr, 12);
1723         *p++ = cpu_to_be32(args->flags);
1724         *p++ = cpu_to_be32(0);  /* zero length state_protect4_a */
1725
1726         if (send_implementation_id &&
1727             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1728             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1729                 <= NFS4_OPAQUE_LIMIT + 1)
1730                 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1731                                utsname()->sysname, utsname()->release,
1732                                utsname()->version, utsname()->machine);
1733
1734         if (len > 0) {
1735                 *p = cpu_to_be32(1);    /* implementation id array length=1 */
1736
1737                 encode_string(xdr,
1738                         sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1739                         CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1740                 encode_string(xdr, len, impl_name);
1741                 /* just send zeros for nii_date - the date is in nii_name */
1742                 p = reserve_space(xdr, 12);
1743                 p = xdr_encode_hyper(p, 0);
1744                 *p = cpu_to_be32(0);
1745         } else
1746                 *p = cpu_to_be32(0);    /* implementation id array length=0 */
1747 }
1748
1749 static void encode_create_session(struct xdr_stream *xdr,
1750                                   struct nfs41_create_session_args *args,
1751                                   struct compound_hdr *hdr)
1752 {
1753         __be32 *p;
1754         char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1755         uint32_t len;
1756         struct nfs_client *clp = args->client;
1757         struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1758         u32 max_resp_sz_cached;
1759
1760         /*
1761          * Assumes OPEN is the biggest non-idempotent compound.
1762          * 2 is the verifier.
1763          */
1764         max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1765                               RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1766
1767         len = scnprintf(machine_name, sizeof(machine_name), "%s",
1768                         clp->cl_ipaddr);
1769
1770         encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1771         p = reserve_space(xdr, 16 + 2*28 + 20 + len + 12);
1772         p = xdr_encode_hyper(p, clp->cl_clientid);
1773         *p++ = cpu_to_be32(clp->cl_seqid);                      /*Sequence id */
1774         *p++ = cpu_to_be32(args->flags);                        /*flags */
1775
1776         /* Fore Channel */
1777         *p++ = cpu_to_be32(0);                          /* header padding size */
1778         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1779         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1780         *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1781         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1782         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1783         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1784
1785         /* Back Channel */
1786         *p++ = cpu_to_be32(0);                          /* header padding size */
1787         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1788         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1789         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1790         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1791         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1792         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1793
1794         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1795         *p++ = cpu_to_be32(1);
1796         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1797
1798         /* authsys_parms rfc1831 */
1799         *p++ = (__be32)nn->boot_time.tv_nsec;           /* stamp */
1800         p = xdr_encode_opaque(p, machine_name, len);
1801         *p++ = cpu_to_be32(0);                          /* UID */
1802         *p++ = cpu_to_be32(0);                          /* GID */
1803         *p = cpu_to_be32(0);                            /* No more gids */
1804 }
1805
1806 static void encode_destroy_session(struct xdr_stream *xdr,
1807                                    struct nfs4_session *session,
1808                                    struct compound_hdr *hdr)
1809 {
1810         encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1811         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1812 }
1813
1814 static void encode_destroy_clientid(struct xdr_stream *xdr,
1815                                    uint64_t clientid,
1816                                    struct compound_hdr *hdr)
1817 {
1818         encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1819         encode_uint64(xdr, clientid);
1820 }
1821
1822 static void encode_reclaim_complete(struct xdr_stream *xdr,
1823                                     struct nfs41_reclaim_complete_args *args,
1824                                     struct compound_hdr *hdr)
1825 {
1826         encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1827         encode_uint32(xdr, args->one_fs);
1828 }
1829 #endif /* CONFIG_NFS_V4_1 */
1830
1831 static void encode_sequence(struct xdr_stream *xdr,
1832                             const struct nfs4_sequence_args *args,
1833                             struct compound_hdr *hdr)
1834 {
1835 #if defined(CONFIG_NFS_V4_1)
1836         struct nfs4_session *session = args->sa_session;
1837         struct nfs4_slot_table *tp;
1838         struct nfs4_slot *slot;
1839         __be32 *p;
1840
1841         if (!session)
1842                 return;
1843
1844         tp = &session->fc_slot_table;
1845
1846         WARN_ON(args->sa_slotid == NFS4_MAX_SLOT_TABLE);
1847         slot = tp->slots + args->sa_slotid;
1848
1849         encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1850
1851         /*
1852          * Sessionid + seqid + slotid + max slotid + cache_this
1853          */
1854         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1855                 "max_slotid=%d cache_this=%d\n",
1856                 __func__,
1857                 ((u32 *)session->sess_id.data)[0],
1858                 ((u32 *)session->sess_id.data)[1],
1859                 ((u32 *)session->sess_id.data)[2],
1860                 ((u32 *)session->sess_id.data)[3],
1861                 slot->seq_nr, args->sa_slotid,
1862                 tp->highest_used_slotid, args->sa_cache_this);
1863         p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1864         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1865         *p++ = cpu_to_be32(slot->seq_nr);
1866         *p++ = cpu_to_be32(args->sa_slotid);
1867         *p++ = cpu_to_be32(tp->highest_used_slotid);
1868         *p = cpu_to_be32(args->sa_cache_this);
1869 #endif /* CONFIG_NFS_V4_1 */
1870 }
1871
1872 #ifdef CONFIG_NFS_V4_1
1873 static void
1874 encode_getdevicelist(struct xdr_stream *xdr,
1875                      const struct nfs4_getdevicelist_args *args,
1876                      struct compound_hdr *hdr)
1877 {
1878         __be32 *p;
1879         nfs4_verifier dummy = {
1880                 .data = "dummmmmy",
1881         };
1882
1883         encode_op_hdr(xdr, OP_GETDEVICELIST, decode_getdevicelist_maxsz, hdr);
1884         p = reserve_space(xdr, 16);
1885         *p++ = cpu_to_be32(args->layoutclass);
1886         *p++ = cpu_to_be32(NFS4_PNFS_GETDEVLIST_MAXNUM);
1887         xdr_encode_hyper(p, 0ULL);                          /* cookie */
1888         encode_nfs4_verifier(xdr, &dummy);
1889 }
1890
1891 static void
1892 encode_getdeviceinfo(struct xdr_stream *xdr,
1893                      const struct nfs4_getdeviceinfo_args *args,
1894                      struct compound_hdr *hdr)
1895 {
1896         __be32 *p;
1897
1898         encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1899         p = reserve_space(xdr, 12 + NFS4_DEVICEID4_SIZE);
1900         p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1901                                     NFS4_DEVICEID4_SIZE);
1902         *p++ = cpu_to_be32(args->pdev->layout_type);
1903         *p++ = cpu_to_be32(args->pdev->pglen);          /* gdia_maxcount */
1904         *p++ = cpu_to_be32(0);                          /* bitmap length 0 */
1905 }
1906
1907 static void
1908 encode_layoutget(struct xdr_stream *xdr,
1909                       const struct nfs4_layoutget_args *args,
1910                       struct compound_hdr *hdr)
1911 {
1912         __be32 *p;
1913
1914         encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1915         p = reserve_space(xdr, 36);
1916         *p++ = cpu_to_be32(0);     /* Signal layout available */
1917         *p++ = cpu_to_be32(args->type);
1918         *p++ = cpu_to_be32(args->range.iomode);
1919         p = xdr_encode_hyper(p, args->range.offset);
1920         p = xdr_encode_hyper(p, args->range.length);
1921         p = xdr_encode_hyper(p, args->minlength);
1922         encode_nfs4_stateid(xdr, &args->stateid);
1923         encode_uint32(xdr, args->maxcount);
1924
1925         dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1926                 __func__,
1927                 args->type,
1928                 args->range.iomode,
1929                 (unsigned long)args->range.offset,
1930                 (unsigned long)args->range.length,
1931                 args->maxcount);
1932 }
1933
1934 static int
1935 encode_layoutcommit(struct xdr_stream *xdr,
1936                     struct inode *inode,
1937                     const struct nfs4_layoutcommit_args *args,
1938                     struct compound_hdr *hdr)
1939 {
1940         __be32 *p;
1941
1942         dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1943                 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1944
1945         encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
1946         p = reserve_space(xdr, 20);
1947         /* Only whole file layouts */
1948         p = xdr_encode_hyper(p, 0); /* offset */
1949         p = xdr_encode_hyper(p, args->lastbytewritten + 1);     /* length */
1950         *p = cpu_to_be32(0); /* reclaim */
1951         encode_nfs4_stateid(xdr, &args->stateid);
1952         p = reserve_space(xdr, 20);
1953         *p++ = cpu_to_be32(1); /* newoffset = TRUE */
1954         p = xdr_encode_hyper(p, args->lastbytewritten);
1955         *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
1956         *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
1957
1958         if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit)
1959                 NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
1960                         NFS_I(inode)->layout, xdr, args);
1961         else
1962                 encode_uint32(xdr, 0); /* no layout-type payload */
1963
1964         return 0;
1965 }
1966
1967 static void
1968 encode_layoutreturn(struct xdr_stream *xdr,
1969                     const struct nfs4_layoutreturn_args *args,
1970                     struct compound_hdr *hdr)
1971 {
1972         __be32 *p;
1973
1974         encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
1975         p = reserve_space(xdr, 16);
1976         *p++ = cpu_to_be32(0);          /* reclaim. always 0 for now */
1977         *p++ = cpu_to_be32(args->layout_type);
1978         *p++ = cpu_to_be32(IOMODE_ANY);
1979         *p = cpu_to_be32(RETURN_FILE);
1980         p = reserve_space(xdr, 16);
1981         p = xdr_encode_hyper(p, 0);
1982         p = xdr_encode_hyper(p, NFS4_MAX_UINT64);
1983         spin_lock(&args->inode->i_lock);
1984         encode_nfs4_stateid(xdr, &args->stateid);
1985         spin_unlock(&args->inode->i_lock);
1986         if (NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn) {
1987                 NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn(
1988                         NFS_I(args->inode)->layout, xdr, args);
1989         } else
1990                 encode_uint32(xdr, 0);
1991 }
1992
1993 static int
1994 encode_secinfo_no_name(struct xdr_stream *xdr,
1995                        const struct nfs41_secinfo_no_name_args *args,
1996                        struct compound_hdr *hdr)
1997 {
1998         encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
1999         encode_uint32(xdr, args->style);
2000         return 0;
2001 }
2002
2003 static void encode_test_stateid(struct xdr_stream *xdr,
2004                                 struct nfs41_test_stateid_args *args,
2005                                 struct compound_hdr *hdr)
2006 {
2007         encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2008         encode_uint32(xdr, 1);
2009         encode_nfs4_stateid(xdr, args->stateid);
2010 }
2011
2012 static void encode_free_stateid(struct xdr_stream *xdr,
2013                                 struct nfs41_free_stateid_args *args,
2014                                 struct compound_hdr *hdr)
2015 {
2016         encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2017         encode_nfs4_stateid(xdr, args->stateid);
2018 }
2019 #endif /* CONFIG_NFS_V4_1 */
2020
2021 /*
2022  * END OF "GENERIC" ENCODE ROUTINES.
2023  */
2024
2025 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2026 {
2027 #if defined(CONFIG_NFS_V4_1)
2028         if (args->sa_session)
2029                 return args->sa_session->clp->cl_mvops->minor_version;
2030 #endif /* CONFIG_NFS_V4_1 */
2031         return 0;
2032 }
2033
2034 /*
2035  * Encode an ACCESS request
2036  */
2037 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2038                                 const struct nfs4_accessargs *args)
2039 {
2040         struct compound_hdr hdr = {
2041                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2042         };
2043
2044         encode_compound_hdr(xdr, req, &hdr);
2045         encode_sequence(xdr, &args->seq_args, &hdr);
2046         encode_putfh(xdr, args->fh, &hdr);
2047         encode_access(xdr, args->access, &hdr);
2048         encode_getfattr(xdr, args->bitmask, &hdr);
2049         encode_nops(&hdr);
2050 }
2051
2052 /*
2053  * Encode LOOKUP request
2054  */
2055 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2056                                 const struct nfs4_lookup_arg *args)
2057 {
2058         struct compound_hdr hdr = {
2059                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2060         };
2061
2062         encode_compound_hdr(xdr, req, &hdr);
2063         encode_sequence(xdr, &args->seq_args, &hdr);
2064         encode_putfh(xdr, args->dir_fh, &hdr);
2065         encode_lookup(xdr, args->name, &hdr);
2066         encode_getfh(xdr, &hdr);
2067         encode_getfattr(xdr, args->bitmask, &hdr);
2068         encode_nops(&hdr);
2069 }
2070
2071 /*
2072  * Encode LOOKUP_ROOT request
2073  */
2074 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2075                                      struct xdr_stream *xdr,
2076                                      const struct nfs4_lookup_root_arg *args)
2077 {
2078         struct compound_hdr hdr = {
2079                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2080         };
2081
2082         encode_compound_hdr(xdr, req, &hdr);
2083         encode_sequence(xdr, &args->seq_args, &hdr);
2084         encode_putrootfh(xdr, &hdr);
2085         encode_getfh(xdr, &hdr);
2086         encode_getfattr(xdr, args->bitmask, &hdr);
2087         encode_nops(&hdr);
2088 }
2089
2090 /*
2091  * Encode REMOVE request
2092  */
2093 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2094                                 const struct nfs_removeargs *args)
2095 {
2096         struct compound_hdr hdr = {
2097                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2098         };
2099
2100         encode_compound_hdr(xdr, req, &hdr);
2101         encode_sequence(xdr, &args->seq_args, &hdr);
2102         encode_putfh(xdr, args->fh, &hdr);
2103         encode_remove(xdr, &args->name, &hdr);
2104         encode_nops(&hdr);
2105 }
2106
2107 /*
2108  * Encode RENAME request
2109  */
2110 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2111                                 const struct nfs_renameargs *args)
2112 {
2113         struct compound_hdr hdr = {
2114                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2115         };
2116
2117         encode_compound_hdr(xdr, req, &hdr);
2118         encode_sequence(xdr, &args->seq_args, &hdr);
2119         encode_putfh(xdr, args->old_dir, &hdr);
2120         encode_savefh(xdr, &hdr);
2121         encode_putfh(xdr, args->new_dir, &hdr);
2122         encode_rename(xdr, args->old_name, args->new_name, &hdr);
2123         encode_nops(&hdr);
2124 }
2125
2126 /*
2127  * Encode LINK request
2128  */
2129 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2130                              const struct nfs4_link_arg *args)
2131 {
2132         struct compound_hdr hdr = {
2133                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2134         };
2135
2136         encode_compound_hdr(xdr, req, &hdr);
2137         encode_sequence(xdr, &args->seq_args, &hdr);
2138         encode_putfh(xdr, args->fh, &hdr);
2139         encode_savefh(xdr, &hdr);
2140         encode_putfh(xdr, args->dir_fh, &hdr);
2141         encode_link(xdr, args->name, &hdr);
2142         encode_restorefh(xdr, &hdr);
2143         encode_getfattr(xdr, args->bitmask, &hdr);
2144         encode_nops(&hdr);
2145 }
2146
2147 /*
2148  * Encode CREATE request
2149  */
2150 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2151                                 const struct nfs4_create_arg *args)
2152 {
2153         struct compound_hdr hdr = {
2154                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2155         };
2156
2157         encode_compound_hdr(xdr, req, &hdr);
2158         encode_sequence(xdr, &args->seq_args, &hdr);
2159         encode_putfh(xdr, args->dir_fh, &hdr);
2160         encode_create(xdr, args, &hdr);
2161         encode_getfh(xdr, &hdr);
2162         encode_getfattr(xdr, args->bitmask, &hdr);
2163         encode_nops(&hdr);
2164 }
2165
2166 /*
2167  * Encode SYMLINK request
2168  */
2169 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2170                                  const struct nfs4_create_arg *args)
2171 {
2172         nfs4_xdr_enc_create(req, xdr, args);
2173 }
2174
2175 /*
2176  * Encode GETATTR request
2177  */
2178 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2179                                  const struct nfs4_getattr_arg *args)
2180 {
2181         struct compound_hdr hdr = {
2182                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2183         };
2184
2185         encode_compound_hdr(xdr, req, &hdr);
2186         encode_sequence(xdr, &args->seq_args, &hdr);
2187         encode_putfh(xdr, args->fh, &hdr);
2188         encode_getfattr(xdr, args->bitmask, &hdr);
2189         encode_nops(&hdr);
2190 }
2191
2192 /*
2193  * Encode a CLOSE request
2194  */
2195 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2196                                struct nfs_closeargs *args)
2197 {
2198         struct compound_hdr hdr = {
2199                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2200         };
2201
2202         encode_compound_hdr(xdr, req, &hdr);
2203         encode_sequence(xdr, &args->seq_args, &hdr);
2204         encode_putfh(xdr, args->fh, &hdr);
2205         encode_close(xdr, args, &hdr);
2206         encode_getfattr(xdr, args->bitmask, &hdr);
2207         encode_nops(&hdr);
2208 }
2209
2210 /*
2211  * Encode an OPEN request
2212  */
2213 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2214                               struct nfs_openargs *args)
2215 {
2216         struct compound_hdr hdr = {
2217                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2218         };
2219
2220         encode_compound_hdr(xdr, req, &hdr);
2221         encode_sequence(xdr, &args->seq_args, &hdr);
2222         encode_putfh(xdr, args->fh, &hdr);
2223         encode_open(xdr, args, &hdr);
2224         encode_getfh(xdr, &hdr);
2225         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2226         encode_nops(&hdr);
2227 }
2228
2229 /*
2230  * Encode an OPEN_CONFIRM request
2231  */
2232 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2233                                       struct xdr_stream *xdr,
2234                                       struct nfs_open_confirmargs *args)
2235 {
2236         struct compound_hdr hdr = {
2237                 .nops   = 0,
2238         };
2239
2240         encode_compound_hdr(xdr, req, &hdr);
2241         encode_putfh(xdr, args->fh, &hdr);
2242         encode_open_confirm(xdr, args, &hdr);
2243         encode_nops(&hdr);
2244 }
2245
2246 /*
2247  * Encode an OPEN request with no attributes.
2248  */
2249 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2250                                      struct xdr_stream *xdr,
2251                                      struct nfs_openargs *args)
2252 {
2253         struct compound_hdr hdr = {
2254                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2255         };
2256
2257         encode_compound_hdr(xdr, req, &hdr);
2258         encode_sequence(xdr, &args->seq_args, &hdr);
2259         encode_putfh(xdr, args->fh, &hdr);
2260         encode_open(xdr, args, &hdr);
2261         encode_getfattr(xdr, args->bitmask, &hdr);
2262         encode_nops(&hdr);
2263 }
2264
2265 /*
2266  * Encode an OPEN_DOWNGRADE request
2267  */
2268 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2269                                         struct xdr_stream *xdr,
2270                                         struct nfs_closeargs *args)
2271 {
2272         struct compound_hdr hdr = {
2273                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2274         };
2275
2276         encode_compound_hdr(xdr, req, &hdr);
2277         encode_sequence(xdr, &args->seq_args, &hdr);
2278         encode_putfh(xdr, args->fh, &hdr);
2279         encode_open_downgrade(xdr, args, &hdr);
2280         encode_getfattr(xdr, args->bitmask, &hdr);
2281         encode_nops(&hdr);
2282 }
2283
2284 /*
2285  * Encode a LOCK request
2286  */
2287 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2288                               struct nfs_lock_args *args)
2289 {
2290         struct compound_hdr hdr = {
2291                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2292         };
2293
2294         encode_compound_hdr(xdr, req, &hdr);
2295         encode_sequence(xdr, &args->seq_args, &hdr);
2296         encode_putfh(xdr, args->fh, &hdr);
2297         encode_lock(xdr, args, &hdr);
2298         encode_nops(&hdr);
2299 }
2300
2301 /*
2302  * Encode a LOCKT request
2303  */
2304 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2305                                struct nfs_lockt_args *args)
2306 {
2307         struct compound_hdr hdr = {
2308                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2309         };
2310
2311         encode_compound_hdr(xdr, req, &hdr);
2312         encode_sequence(xdr, &args->seq_args, &hdr);
2313         encode_putfh(xdr, args->fh, &hdr);
2314         encode_lockt(xdr, args, &hdr);
2315         encode_nops(&hdr);
2316 }
2317
2318 /*
2319  * Encode a LOCKU request
2320  */
2321 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2322                                struct nfs_locku_args *args)
2323 {
2324         struct compound_hdr hdr = {
2325                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2326         };
2327
2328         encode_compound_hdr(xdr, req, &hdr);
2329         encode_sequence(xdr, &args->seq_args, &hdr);
2330         encode_putfh(xdr, args->fh, &hdr);
2331         encode_locku(xdr, args, &hdr);
2332         encode_nops(&hdr);
2333 }
2334
2335 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2336                                            struct xdr_stream *xdr,
2337                                         struct nfs_release_lockowner_args *args)
2338 {
2339         struct compound_hdr hdr = {
2340                 .minorversion = 0,
2341         };
2342
2343         encode_compound_hdr(xdr, req, &hdr);
2344         encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2345         encode_nops(&hdr);
2346 }
2347
2348 /*
2349  * Encode a READLINK request
2350  */
2351 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2352                                   const struct nfs4_readlink *args)
2353 {
2354         struct compound_hdr hdr = {
2355                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2356         };
2357
2358         encode_compound_hdr(xdr, req, &hdr);
2359         encode_sequence(xdr, &args->seq_args, &hdr);
2360         encode_putfh(xdr, args->fh, &hdr);
2361         encode_readlink(xdr, args, req, &hdr);
2362
2363         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2364                         args->pgbase, args->pglen);
2365         encode_nops(&hdr);
2366 }
2367
2368 /*
2369  * Encode a READDIR request
2370  */
2371 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2372                                  const struct nfs4_readdir_arg *args)
2373 {
2374         struct compound_hdr hdr = {
2375                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2376         };
2377
2378         encode_compound_hdr(xdr, req, &hdr);
2379         encode_sequence(xdr, &args->seq_args, &hdr);
2380         encode_putfh(xdr, args->fh, &hdr);
2381         encode_readdir(xdr, args, req, &hdr);
2382
2383         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2384                          args->pgbase, args->count);
2385         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2386                         __func__, hdr.replen << 2, args->pages,
2387                         args->pgbase, args->count);
2388         encode_nops(&hdr);
2389 }
2390
2391 /*
2392  * Encode a READ request
2393  */
2394 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2395                               struct nfs_readargs *args)
2396 {
2397         struct compound_hdr hdr = {
2398                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2399         };
2400
2401         encode_compound_hdr(xdr, req, &hdr);
2402         encode_sequence(xdr, &args->seq_args, &hdr);
2403         encode_putfh(xdr, args->fh, &hdr);
2404         encode_read(xdr, args, &hdr);
2405
2406         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2407                          args->pages, args->pgbase, args->count);
2408         req->rq_rcv_buf.flags |= XDRBUF_READ;
2409         encode_nops(&hdr);
2410 }
2411
2412 /*
2413  * Encode an SETATTR request
2414  */
2415 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2416                                  struct nfs_setattrargs *args)
2417 {
2418         struct compound_hdr hdr = {
2419                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2420         };
2421
2422         encode_compound_hdr(xdr, req, &hdr);
2423         encode_sequence(xdr, &args->seq_args, &hdr);
2424         encode_putfh(xdr, args->fh, &hdr);
2425         encode_setattr(xdr, args, args->server, &hdr);
2426         encode_getfattr(xdr, args->bitmask, &hdr);
2427         encode_nops(&hdr);
2428 }
2429
2430 /*
2431  * Encode a GETACL request
2432  */
2433 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2434                                 struct nfs_getaclargs *args)
2435 {
2436         struct compound_hdr hdr = {
2437                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2438         };
2439         uint32_t replen;
2440
2441         encode_compound_hdr(xdr, req, &hdr);
2442         encode_sequence(xdr, &args->seq_args, &hdr);
2443         encode_putfh(xdr, args->fh, &hdr);
2444         replen = hdr.replen + op_decode_hdr_maxsz + 1;
2445         encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2446
2447         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2448                 args->acl_pages, args->acl_pgbase, args->acl_len);
2449
2450         encode_nops(&hdr);
2451 }
2452
2453 /*
2454  * Encode a WRITE request
2455  */
2456 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2457                                struct nfs_writeargs *args)
2458 {
2459         struct compound_hdr hdr = {
2460                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2461         };
2462
2463         encode_compound_hdr(xdr, req, &hdr);
2464         encode_sequence(xdr, &args->seq_args, &hdr);
2465         encode_putfh(xdr, args->fh, &hdr);
2466         encode_write(xdr, args, &hdr);
2467         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2468         if (args->bitmask)
2469                 encode_getfattr(xdr, args->bitmask, &hdr);
2470         encode_nops(&hdr);
2471 }
2472
2473 /*
2474  *  a COMMIT request
2475  */
2476 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2477                                 struct nfs_commitargs *args)
2478 {
2479         struct compound_hdr hdr = {
2480                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2481         };
2482
2483         encode_compound_hdr(xdr, req, &hdr);
2484         encode_sequence(xdr, &args->seq_args, &hdr);
2485         encode_putfh(xdr, args->fh, &hdr);
2486         encode_commit(xdr, args, &hdr);
2487         encode_nops(&hdr);
2488 }
2489
2490 /*
2491  * FSINFO request
2492  */
2493 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2494                                 struct nfs4_fsinfo_arg *args)
2495 {
2496         struct compound_hdr hdr = {
2497                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2498         };
2499
2500         encode_compound_hdr(xdr, req, &hdr);
2501         encode_sequence(xdr, &args->seq_args, &hdr);
2502         encode_putfh(xdr, args->fh, &hdr);
2503         encode_fsinfo(xdr, args->bitmask, &hdr);
2504         encode_nops(&hdr);
2505 }
2506
2507 /*
2508  * a PATHCONF request
2509  */
2510 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2511                                   const struct nfs4_pathconf_arg *args)
2512 {
2513         struct compound_hdr hdr = {
2514                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2515         };
2516
2517         encode_compound_hdr(xdr, req, &hdr);
2518         encode_sequence(xdr, &args->seq_args, &hdr);
2519         encode_putfh(xdr, args->fh, &hdr);
2520         encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2521                            &hdr);
2522         encode_nops(&hdr);
2523 }
2524
2525 /*
2526  * a STATFS request
2527  */
2528 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2529                                 const struct nfs4_statfs_arg *args)
2530 {
2531         struct compound_hdr hdr = {
2532                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2533         };
2534
2535         encode_compound_hdr(xdr, req, &hdr);
2536         encode_sequence(xdr, &args->seq_args, &hdr);
2537         encode_putfh(xdr, args->fh, &hdr);
2538         encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2539                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2540         encode_nops(&hdr);
2541 }
2542
2543 /*
2544  * GETATTR_BITMAP request
2545  */
2546 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2547                                      struct xdr_stream *xdr,
2548                                      struct nfs4_server_caps_arg *args)
2549 {
2550         struct compound_hdr hdr = {
2551                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2552         };
2553
2554         encode_compound_hdr(xdr, req, &hdr);
2555         encode_sequence(xdr, &args->seq_args, &hdr);
2556         encode_putfh(xdr, args->fhandle, &hdr);
2557         encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2558                            FATTR4_WORD0_FH_EXPIRE_TYPE|
2559                            FATTR4_WORD0_LINK_SUPPORT|
2560                            FATTR4_WORD0_SYMLINK_SUPPORT|
2561                            FATTR4_WORD0_ACLSUPPORT, &hdr);
2562         encode_nops(&hdr);
2563 }
2564
2565 /*
2566  * a RENEW request
2567  */
2568 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2569                                struct nfs_client *clp)
2570 {
2571         struct compound_hdr hdr = {
2572                 .nops   = 0,
2573         };
2574
2575         encode_compound_hdr(xdr, req, &hdr);
2576         encode_renew(xdr, clp->cl_clientid, &hdr);
2577         encode_nops(&hdr);
2578 }
2579
2580 /*
2581  * a SETCLIENTID request
2582  */
2583 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2584                                      struct xdr_stream *xdr,
2585                                      struct nfs4_setclientid *sc)
2586 {
2587         struct compound_hdr hdr = {
2588                 .nops   = 0,
2589         };
2590
2591         encode_compound_hdr(xdr, req, &hdr);
2592         encode_setclientid(xdr, sc, &hdr);
2593         encode_nops(&hdr);
2594 }
2595
2596 /*
2597  * a SETCLIENTID_CONFIRM request
2598  */
2599 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2600                                              struct xdr_stream *xdr,
2601                                              struct nfs4_setclientid_res *arg)
2602 {
2603         struct compound_hdr hdr = {
2604                 .nops   = 0,
2605         };
2606         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2607
2608         encode_compound_hdr(xdr, req, &hdr);
2609         encode_setclientid_confirm(xdr, arg, &hdr);
2610         encode_putrootfh(xdr, &hdr);
2611         encode_fsinfo(xdr, lease_bitmap, &hdr);
2612         encode_nops(&hdr);
2613 }
2614
2615 /*
2616  * DELEGRETURN request
2617  */
2618 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2619                                      struct xdr_stream *xdr,
2620                                      const struct nfs4_delegreturnargs *args)
2621 {
2622         struct compound_hdr hdr = {
2623                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2624         };
2625
2626         encode_compound_hdr(xdr, req, &hdr);
2627         encode_sequence(xdr, &args->seq_args, &hdr);
2628         encode_putfh(xdr, args->fhandle, &hdr);
2629         encode_getfattr(xdr, args->bitmask, &hdr);
2630         encode_delegreturn(xdr, args->stateid, &hdr);
2631         encode_nops(&hdr);
2632 }
2633
2634 /*
2635  * Encode FS_LOCATIONS request
2636  */
2637 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2638                                       struct xdr_stream *xdr,
2639                                       struct nfs4_fs_locations_arg *args)
2640 {
2641         struct compound_hdr hdr = {
2642                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2643         };
2644         uint32_t replen;
2645
2646         encode_compound_hdr(xdr, req, &hdr);
2647         encode_sequence(xdr, &args->seq_args, &hdr);
2648         encode_putfh(xdr, args->dir_fh, &hdr);
2649         encode_lookup(xdr, args->name, &hdr);
2650         replen = hdr.replen;    /* get the attribute into args->page */
2651         encode_fs_locations(xdr, args->bitmask, &hdr);
2652
2653         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2654                         0, PAGE_SIZE);
2655         encode_nops(&hdr);
2656 }
2657
2658 /*
2659  * Encode SECINFO request
2660  */
2661 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2662                                 struct xdr_stream *xdr,
2663                                 struct nfs4_secinfo_arg *args)
2664 {
2665         struct compound_hdr hdr = {
2666                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2667         };
2668
2669         encode_compound_hdr(xdr, req, &hdr);
2670         encode_sequence(xdr, &args->seq_args, &hdr);
2671         encode_putfh(xdr, args->dir_fh, &hdr);
2672         encode_secinfo(xdr, args->name, &hdr);
2673         encode_nops(&hdr);
2674 }
2675
2676 #if defined(CONFIG_NFS_V4_1)
2677 /*
2678  * BIND_CONN_TO_SESSION request
2679  */
2680 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2681                                 struct xdr_stream *xdr,
2682                                 struct nfs_client *clp)
2683 {
2684         struct compound_hdr hdr = {
2685                 .minorversion = clp->cl_mvops->minor_version,
2686         };
2687
2688         encode_compound_hdr(xdr, req, &hdr);
2689         encode_bind_conn_to_session(xdr, clp->cl_session, &hdr);
2690         encode_nops(&hdr);
2691 }
2692
2693 /*
2694  * EXCHANGE_ID request
2695  */
2696 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2697                                      struct xdr_stream *xdr,
2698                                      struct nfs41_exchange_id_args *args)
2699 {
2700         struct compound_hdr hdr = {
2701                 .minorversion = args->client->cl_mvops->minor_version,
2702         };
2703
2704         encode_compound_hdr(xdr, req, &hdr);
2705         encode_exchange_id(xdr, args, &hdr);
2706         encode_nops(&hdr);
2707 }
2708
2709 /*
2710  * a CREATE_SESSION request
2711  */
2712 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2713                                         struct xdr_stream *xdr,
2714                                         struct nfs41_create_session_args *args)
2715 {
2716         struct compound_hdr hdr = {
2717                 .minorversion = args->client->cl_mvops->minor_version,
2718         };
2719
2720         encode_compound_hdr(xdr, req, &hdr);
2721         encode_create_session(xdr, args, &hdr);
2722         encode_nops(&hdr);
2723 }
2724
2725 /*
2726  * a DESTROY_SESSION request
2727  */
2728 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2729                                          struct xdr_stream *xdr,
2730                                          struct nfs4_session *session)
2731 {
2732         struct compound_hdr hdr = {
2733                 .minorversion = session->clp->cl_mvops->minor_version,
2734         };
2735
2736         encode_compound_hdr(xdr, req, &hdr);
2737         encode_destroy_session(xdr, session, &hdr);
2738         encode_nops(&hdr);
2739 }
2740
2741 /*
2742  * a DESTROY_CLIENTID request
2743  */
2744 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2745                                          struct xdr_stream *xdr,
2746                                          struct nfs_client *clp)
2747 {
2748         struct compound_hdr hdr = {
2749                 .minorversion = clp->cl_mvops->minor_version,
2750         };
2751
2752         encode_compound_hdr(xdr, req, &hdr);
2753         encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2754         encode_nops(&hdr);
2755 }
2756
2757 /*
2758  * a SEQUENCE request
2759  */
2760 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2761                                   struct nfs4_sequence_args *args)
2762 {
2763         struct compound_hdr hdr = {
2764                 .minorversion = nfs4_xdr_minorversion(args),
2765         };
2766
2767         encode_compound_hdr(xdr, req, &hdr);
2768         encode_sequence(xdr, args, &hdr);
2769         encode_nops(&hdr);
2770 }
2771
2772 /*
2773  * a GET_LEASE_TIME request
2774  */
2775 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2776                                         struct xdr_stream *xdr,
2777                                         struct nfs4_get_lease_time_args *args)
2778 {
2779         struct compound_hdr hdr = {
2780                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2781         };
2782         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2783
2784         encode_compound_hdr(xdr, req, &hdr);
2785         encode_sequence(xdr, &args->la_seq_args, &hdr);
2786         encode_putrootfh(xdr, &hdr);
2787         encode_fsinfo(xdr, lease_bitmap, &hdr);
2788         encode_nops(&hdr);
2789 }
2790
2791 /*
2792  * a RECLAIM_COMPLETE request
2793  */
2794 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2795                                           struct xdr_stream *xdr,
2796                                 struct nfs41_reclaim_complete_args *args)
2797 {
2798         struct compound_hdr hdr = {
2799                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2800         };
2801
2802         encode_compound_hdr(xdr, req, &hdr);
2803         encode_sequence(xdr, &args->seq_args, &hdr);
2804         encode_reclaim_complete(xdr, args, &hdr);
2805         encode_nops(&hdr);
2806 }
2807
2808 /*
2809  * Encode GETDEVICELIST request
2810  */
2811 static void nfs4_xdr_enc_getdevicelist(struct rpc_rqst *req,
2812                                        struct xdr_stream *xdr,
2813                                        struct nfs4_getdevicelist_args *args)
2814 {
2815         struct compound_hdr hdr = {
2816                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2817         };
2818
2819         encode_compound_hdr(xdr, req, &hdr);
2820         encode_sequence(xdr, &args->seq_args, &hdr);
2821         encode_putfh(xdr, args->fh, &hdr);
2822         encode_getdevicelist(xdr, args, &hdr);
2823         encode_nops(&hdr);
2824 }
2825
2826 /*
2827  * Encode GETDEVICEINFO request
2828  */
2829 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2830                                        struct xdr_stream *xdr,
2831                                        struct nfs4_getdeviceinfo_args *args)
2832 {
2833         struct compound_hdr hdr = {
2834                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2835         };
2836
2837         encode_compound_hdr(xdr, req, &hdr);
2838         encode_sequence(xdr, &args->seq_args, &hdr);
2839         encode_getdeviceinfo(xdr, args, &hdr);
2840
2841         /* set up reply kvec. Subtract notification bitmap max size (2)
2842          * so that notification bitmap is put in xdr_buf tail */
2843         xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2844                          args->pdev->pages, args->pdev->pgbase,
2845                          args->pdev->pglen);
2846
2847         encode_nops(&hdr);
2848 }
2849
2850 /*
2851  *  Encode LAYOUTGET request
2852  */
2853 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2854                                    struct xdr_stream *xdr,
2855                                    struct nfs4_layoutget_args *args)
2856 {
2857         struct compound_hdr hdr = {
2858                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2859         };
2860
2861         encode_compound_hdr(xdr, req, &hdr);
2862         encode_sequence(xdr, &args->seq_args, &hdr);
2863         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2864         encode_layoutget(xdr, args, &hdr);
2865
2866         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2867             args->layout.pages, 0, args->layout.pglen);
2868
2869         encode_nops(&hdr);
2870 }
2871
2872 /*
2873  *  Encode LAYOUTCOMMIT request
2874  */
2875 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2876                                       struct xdr_stream *xdr,
2877                                       struct nfs4_layoutcommit_args *args)
2878 {
2879         struct nfs4_layoutcommit_data *data =
2880                 container_of(args, struct nfs4_layoutcommit_data, args);
2881         struct compound_hdr hdr = {
2882                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2883         };
2884
2885         encode_compound_hdr(xdr, req, &hdr);
2886         encode_sequence(xdr, &args->seq_args, &hdr);
2887         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2888         encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2889         encode_getfattr(xdr, args->bitmask, &hdr);
2890         encode_nops(&hdr);
2891 }
2892
2893 /*
2894  * Encode LAYOUTRETURN request
2895  */
2896 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2897                                       struct xdr_stream *xdr,
2898                                       struct nfs4_layoutreturn_args *args)
2899 {
2900         struct compound_hdr hdr = {
2901                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2902         };
2903
2904         encode_compound_hdr(xdr, req, &hdr);
2905         encode_sequence(xdr, &args->seq_args, &hdr);
2906         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2907         encode_layoutreturn(xdr, args, &hdr);
2908         encode_nops(&hdr);
2909 }
2910
2911 /*
2912  * Encode SECINFO_NO_NAME request
2913  */
2914 static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
2915                                         struct xdr_stream *xdr,
2916                                         struct nfs41_secinfo_no_name_args *args)
2917 {
2918         struct compound_hdr hdr = {
2919                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2920         };
2921
2922         encode_compound_hdr(xdr, req, &hdr);
2923         encode_sequence(xdr, &args->seq_args, &hdr);
2924         encode_putrootfh(xdr, &hdr);
2925         encode_secinfo_no_name(xdr, args, &hdr);
2926         encode_nops(&hdr);
2927         return 0;
2928 }
2929
2930 /*
2931  *  Encode TEST_STATEID request
2932  */
2933 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
2934                                       struct xdr_stream *xdr,
2935                                       struct nfs41_test_stateid_args *args)
2936 {
2937         struct compound_hdr hdr = {
2938                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2939         };
2940
2941         encode_compound_hdr(xdr, req, &hdr);
2942         encode_sequence(xdr, &args->seq_args, &hdr);
2943         encode_test_stateid(xdr, args, &hdr);
2944         encode_nops(&hdr);
2945 }
2946
2947 /*
2948  *  Encode FREE_STATEID request
2949  */
2950 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
2951                                      struct xdr_stream *xdr,
2952                                      struct nfs41_free_stateid_args *args)
2953 {
2954         struct compound_hdr hdr = {
2955                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2956         };
2957
2958         encode_compound_hdr(xdr, req, &hdr);
2959         encode_sequence(xdr, &args->seq_args, &hdr);
2960         encode_free_stateid(xdr, args, &hdr);
2961         encode_nops(&hdr);
2962 }
2963 #endif /* CONFIG_NFS_V4_1 */
2964
2965 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
2966 {
2967         dprintk("nfs: %s: prematurely hit end of receive buffer. "
2968                 "Remaining buffer length is %tu words.\n",
2969                 func, xdr->end - xdr->p);
2970 }
2971
2972 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2973 {
2974         __be32 *p;
2975
2976         p = xdr_inline_decode(xdr, 4);
2977         if (unlikely(!p))
2978                 goto out_overflow;
2979         *len = be32_to_cpup(p);
2980         p = xdr_inline_decode(xdr, *len);
2981         if (unlikely(!p))
2982                 goto out_overflow;
2983         *string = (char *)p;
2984         return 0;
2985 out_overflow:
2986         print_overflow_msg(__func__, xdr);
2987         return -EIO;
2988 }
2989
2990 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2991 {
2992         __be32 *p;
2993
2994         p = xdr_inline_decode(xdr, 8);
2995         if (unlikely(!p))
2996                 goto out_overflow;
2997         hdr->status = be32_to_cpup(p++);
2998         hdr->taglen = be32_to_cpup(p);
2999
3000         p = xdr_inline_decode(xdr, hdr->taglen + 4);
3001         if (unlikely(!p))
3002                 goto out_overflow;
3003         hdr->tag = (char *)p;
3004         p += XDR_QUADLEN(hdr->taglen);
3005         hdr->nops = be32_to_cpup(p);
3006         if (unlikely(hdr->nops < 1))
3007                 return nfs4_stat_to_errno(hdr->status);
3008         return 0;
3009 out_overflow:
3010         print_overflow_msg(__func__, xdr);
3011         return -EIO;
3012 }
3013
3014 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3015 {
3016         __be32 *p;
3017         uint32_t opnum;
3018         int32_t nfserr;
3019
3020         p = xdr_inline_decode(xdr, 8);
3021         if (unlikely(!p))
3022                 goto out_overflow;
3023         opnum = be32_to_cpup(p++);
3024         if (opnum != expected) {
3025                 dprintk("nfs: Server returned operation"
3026                         " %d but we issued a request for %d\n",
3027                                 opnum, expected);
3028                 return -EIO;
3029         }
3030         nfserr = be32_to_cpup(p);
3031         if (nfserr != NFS_OK)
3032                 return nfs4_stat_to_errno(nfserr);
3033         return 0;
3034 out_overflow:
3035         print_overflow_msg(__func__, xdr);
3036         return -EIO;
3037 }
3038
3039 /* Dummy routine */
3040 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
3041 {
3042         __be32 *p;
3043         unsigned int strlen;
3044         char *str;
3045
3046         p = xdr_inline_decode(xdr, 12);
3047         if (likely(p))
3048                 return decode_opaque_inline(xdr, &strlen, &str);
3049         print_overflow_msg(__func__, xdr);
3050         return -EIO;
3051 }
3052
3053 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3054 {
3055         uint32_t bmlen;
3056         __be32 *p;
3057
3058         p = xdr_inline_decode(xdr, 4);
3059         if (unlikely(!p))
3060                 goto out_overflow;
3061         bmlen = be32_to_cpup(p);
3062
3063         bitmap[0] = bitmap[1] = bitmap[2] = 0;
3064         p = xdr_inline_decode(xdr, (bmlen << 2));
3065         if (unlikely(!p))
3066                 goto out_overflow;
3067         if (bmlen > 0) {
3068                 bitmap[0] = be32_to_cpup(p++);
3069                 if (bmlen > 1) {
3070                         bitmap[1] = be32_to_cpup(p++);
3071                         if (bmlen > 2)
3072                                 bitmap[2] = be32_to_cpup(p);
3073                 }
3074         }
3075         return 0;
3076 out_overflow:
3077         print_overflow_msg(__func__, xdr);
3078         return -EIO;
3079 }
3080
3081 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
3082 {
3083         __be32 *p;
3084
3085         p = xdr_inline_decode(xdr, 4);
3086         if (unlikely(!p))
3087                 goto out_overflow;
3088         *attrlen = be32_to_cpup(p);
3089         *savep = xdr->p;
3090         return 0;
3091 out_overflow:
3092         print_overflow_msg(__func__, xdr);
3093         return -EIO;
3094 }
3095
3096 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3097 {
3098         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3099                 int ret;
3100                 ret = decode_attr_bitmap(xdr, bitmask);
3101                 if (unlikely(ret < 0))
3102                         return ret;
3103                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3104         } else
3105                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3106         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3107                 bitmask[0], bitmask[1], bitmask[2]);
3108         return 0;
3109 }
3110
3111 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3112 {
3113         __be32 *p;
3114         int ret = 0;
3115
3116         *type = 0;
3117         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3118                 return -EIO;
3119         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3120                 p = xdr_inline_decode(xdr, 4);
3121                 if (unlikely(!p))
3122                         goto out_overflow;
3123                 *type = be32_to_cpup(p);
3124                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3125                         dprintk("%s: bad type %d\n", __func__, *type);
3126                         return -EIO;
3127                 }
3128                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3129                 ret = NFS_ATTR_FATTR_TYPE;
3130         }
3131         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3132         return ret;
3133 out_overflow:
3134         print_overflow_msg(__func__, xdr);
3135         return -EIO;
3136 }
3137
3138 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3139                                       uint32_t *bitmap, uint32_t *type)
3140 {
3141         __be32 *p;
3142
3143         *type = 0;
3144         if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3145                 return -EIO;
3146         if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3147                 p = xdr_inline_decode(xdr, 4);
3148                 if (unlikely(!p))
3149                         goto out_overflow;
3150                 *type = be32_to_cpup(p);
3151                 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3152         }
3153         dprintk("%s: expire type=0x%x\n", __func__, *type);
3154         return 0;
3155 out_overflow:
3156         print_overflow_msg(__func__, xdr);
3157         return -EIO;
3158 }
3159
3160 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3161 {
3162         __be32 *p;
3163         int ret = 0;
3164
3165         *change = 0;
3166         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3167                 return -EIO;
3168         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3169                 p = xdr_inline_decode(xdr, 8);
3170                 if (unlikely(!p))
3171                         goto out_overflow;
3172                 xdr_decode_hyper(p, change);
3173                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3174                 ret = NFS_ATTR_FATTR_CHANGE;
3175         }
3176         dprintk("%s: change attribute=%Lu\n", __func__,
3177                         (unsigned long long)*change);
3178         return ret;
3179 out_overflow:
3180         print_overflow_msg(__func__, xdr);
3181         return -EIO;
3182 }
3183
3184 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3185 {
3186         __be32 *p;
3187         int ret = 0;
3188
3189         *size = 0;
3190         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3191                 return -EIO;
3192         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3193                 p = xdr_inline_decode(xdr, 8);
3194                 if (unlikely(!p))
3195                         goto out_overflow;
3196                 xdr_decode_hyper(p, size);
3197                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3198                 ret = NFS_ATTR_FATTR_SIZE;
3199         }
3200         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3201         return ret;
3202 out_overflow:
3203         print_overflow_msg(__func__, xdr);
3204         return -EIO;
3205 }
3206
3207 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3208 {
3209         __be32 *p;
3210
3211         *res = 0;
3212         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3213                 return -EIO;
3214         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3215                 p = xdr_inline_decode(xdr, 4);
3216                 if (unlikely(!p))
3217                         goto out_overflow;
3218                 *res = be32_to_cpup(p);
3219                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3220         }
3221         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3222         return 0;
3223 out_overflow:
3224         print_overflow_msg(__func__, xdr);
3225         return -EIO;
3226 }
3227
3228 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3229 {
3230         __be32 *p;
3231
3232         *res = 0;
3233         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3234                 return -EIO;
3235         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3236                 p = xdr_inline_decode(xdr, 4);
3237                 if (unlikely(!p))
3238                         goto out_overflow;
3239                 *res = be32_to_cpup(p);
3240                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3241         }
3242         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3243         return 0;
3244 out_overflow:
3245         print_overflow_msg(__func__, xdr);
3246         return -EIO;
3247 }
3248
3249 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3250 {
3251         __be32 *p;
3252         int ret = 0;
3253
3254         fsid->major = 0;
3255         fsid->minor = 0;
3256         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3257                 return -EIO;
3258         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3259                 p = xdr_inline_decode(xdr, 16);
3260                 if (unlikely(!p))
3261                         goto out_overflow;
3262                 p = xdr_decode_hyper(p, &fsid->major);
3263                 xdr_decode_hyper(p, &fsid->minor);
3264                 bitmap[0] &= ~FATTR4_WORD0_FSID;
3265                 ret = NFS_ATTR_FATTR_FSID;
3266         }
3267         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3268                         (unsigned long long)fsid->major,
3269                         (unsigned long long)fsid->minor);
3270         return ret;
3271 out_overflow:
3272         print_overflow_msg(__func__, xdr);
3273         return -EIO;
3274 }
3275
3276 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3277 {
3278         __be32 *p;
3279
3280         *res = 60;
3281         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3282                 return -EIO;
3283         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3284                 p = xdr_inline_decode(xdr, 4);
3285                 if (unlikely(!p))
3286                         goto out_overflow;
3287                 *res = be32_to_cpup(p);
3288                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3289         }
3290         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3291         return 0;
3292 out_overflow:
3293         print_overflow_msg(__func__, xdr);
3294         return -EIO;
3295 }
3296
3297 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3298 {
3299         __be32 *p;
3300
3301         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3302                 return -EIO;
3303         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3304                 p = xdr_inline_decode(xdr, 4);
3305                 if (unlikely(!p))
3306                         goto out_overflow;
3307                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3308                 *res = -be32_to_cpup(p);
3309         }
3310         return 0;
3311 out_overflow:
3312         print_overflow_msg(__func__, xdr);
3313         return -EIO;
3314 }
3315
3316 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3317 {
3318         __be32 *p;
3319         int len;
3320
3321         if (fh != NULL)
3322                 memset(fh, 0, sizeof(*fh));
3323
3324         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3325                 return -EIO;
3326         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3327                 p = xdr_inline_decode(xdr, 4);
3328                 if (unlikely(!p))
3329                         goto out_overflow;
3330                 len = be32_to_cpup(p);
3331                 if (len > NFS4_FHSIZE)
3332                         return -EIO;
3333                 p = xdr_inline_decode(xdr, len);
3334                 if (unlikely(!p))
3335                         goto out_overflow;
3336                 if (fh != NULL) {
3337                         memcpy(fh->data, p, len);
3338                         fh->size = len;
3339                 }
3340                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3341         }
3342         return 0;
3343 out_overflow:
3344         print_overflow_msg(__func__, xdr);
3345         return -EIO;
3346 }
3347
3348 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3349 {
3350         __be32 *p;
3351
3352         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
3353         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3354                 return -EIO;
3355         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3356                 p = xdr_inline_decode(xdr, 4);
3357                 if (unlikely(!p))
3358                         goto out_overflow;
3359                 *res = be32_to_cpup(p);
3360                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3361         }
3362         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3363         return 0;
3364 out_overflow:
3365         print_overflow_msg(__func__, xdr);
3366         return -EIO;
3367 }
3368
3369 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3370 {
3371         __be32 *p;
3372         int ret = 0;
3373
3374         *fileid = 0;
3375         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3376                 return -EIO;
3377         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3378                 p = xdr_inline_decode(xdr, 8);
3379                 if (unlikely(!p))
3380                         goto out_overflow;
3381                 xdr_decode_hyper(p, fileid);
3382                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3383                 ret = NFS_ATTR_FATTR_FILEID;
3384         }
3385         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3386         return ret;
3387 out_overflow:
3388         print_overflow_msg(__func__, xdr);
3389         return -EIO;
3390 }
3391
3392 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3393 {
3394         __be32 *p;
3395         int ret = 0;
3396
3397         *fileid = 0;
3398         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3399                 return -EIO;
3400         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3401                 p = xdr_inline_decode(xdr, 8);
3402                 if (unlikely(!p))
3403                         goto out_overflow;
3404                 xdr_decode_hyper(p, fileid);
3405                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3406                 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3407         }
3408         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3409         return ret;
3410 out_overflow:
3411         print_overflow_msg(__func__, xdr);
3412         return -EIO;
3413 }
3414
3415 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3416 {
3417         __be32 *p;
3418         int status = 0;
3419
3420         *res = 0;
3421         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3422                 return -EIO;
3423         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3424                 p = xdr_inline_decode(xdr, 8);
3425                 if (unlikely(!p))
3426                         goto out_overflow;
3427                 xdr_decode_hyper(p, res);
3428                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3429         }
3430         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3431         return status;
3432 out_overflow:
3433         print_overflow_msg(__func__, xdr);
3434         return -EIO;
3435 }
3436
3437 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3438 {
3439         __be32 *p;
3440         int status = 0;
3441
3442         *res = 0;
3443         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3444                 return -EIO;
3445         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3446                 p = xdr_inline_decode(xdr, 8);
3447                 if (unlikely(!p))
3448                         goto out_overflow;
3449                 xdr_decode_hyper(p, res);
3450                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3451         }
3452         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3453         return status;
3454 out_overflow:
3455         print_overflow_msg(__func__, xdr);
3456         return -EIO;
3457 }
3458
3459 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3460 {
3461         __be32 *p;
3462         int status = 0;
3463
3464         *res = 0;
3465         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3466                 return -EIO;
3467         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3468                 p = xdr_inline_decode(xdr, 8);
3469                 if (unlikely(!p))
3470                         goto out_overflow;
3471                 xdr_decode_hyper(p, res);
3472                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3473         }
3474         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3475         return status;
3476 out_overflow:
3477         print_overflow_msg(__func__, xdr);
3478         return -EIO;
3479 }
3480
3481 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3482 {
3483         u32 n;
3484         __be32 *p;
3485         int status = 0;
3486
3487         p = xdr_inline_decode(xdr, 4);
3488         if (unlikely(!p))
3489                 goto out_overflow;
3490         n = be32_to_cpup(p);
3491         if (n == 0)
3492                 goto root_path;
3493         dprintk("pathname4: ");
3494         path->ncomponents = 0;
3495         while (path->ncomponents < n) {
3496                 struct nfs4_string *component = &path->components[path->ncomponents];
3497                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3498                 if (unlikely(status != 0))
3499                         goto out_eio;
3500                 ifdebug (XDR)
3501                         pr_cont("%s%.*s ",
3502                                 (path->ncomponents != n ? "/ " : ""),
3503                                 component->len, component->data);
3504                 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
3505                         path->ncomponents++;
3506                 else {
3507                         dprintk("cannot parse %d components in path\n", n);
3508                         goto out_eio;
3509                 }
3510         }
3511 out:
3512         return status;
3513 root_path:
3514 /* a root pathname is sent as a zero component4 */
3515         path->ncomponents = 1;
3516         path->components[0].len=0;
3517         path->components[0].data=NULL;
3518         dprintk("pathname4: /\n");
3519         goto out;
3520 out_eio:
3521         dprintk(" status %d", status);
3522         status = -EIO;
3523         goto out;
3524 out_overflow:
3525         print_overflow_msg(__func__, xdr);
3526         return -EIO;
3527 }
3528
3529 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3530 {
3531         int n;
3532         __be32 *p;
3533         int status = -EIO;
3534
3535         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3536                 goto out;
3537         status = 0;
3538         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3539                 goto out;
3540         status = -EIO;
3541         /* Ignore borken servers that return unrequested attrs */
3542         if (unlikely(res == NULL))
3543                 goto out;
3544         dprintk("%s: fsroot:\n", __func__);
3545         status = decode_pathname(xdr, &res->fs_path);
3546         if (unlikely(status != 0))
3547                 goto out;
3548         p = xdr_inline_decode(xdr, 4);
3549         if (unlikely(!p))
3550                 goto out_overflow;
3551         n = be32_to_cpup(p);
3552         if (n <= 0)
3553                 goto out_eio;
3554         res->nlocations = 0;
3555         while (res->nlocations < n) {
3556                 u32 m;
3557                 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
3558
3559                 p = xdr_inline_decode(xdr, 4);
3560                 if (unlikely(!p))
3561                         goto out_overflow;
3562                 m = be32_to_cpup(p);
3563
3564                 loc->nservers = 0;
3565                 dprintk("%s: servers:\n", __func__);
3566                 while (loc->nservers < m) {
3567                         struct nfs4_string *server = &loc->servers[loc->nservers];
3568                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3569                         if (unlikely(status != 0))
3570                                 goto out_eio;
3571                         dprintk("%s ", server->data);
3572                         if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
3573                                 loc->nservers++;
3574                         else {
3575                                 unsigned int i;
3576                                 dprintk("%s: using first %u of %u servers "
3577                                         "returned for location %u\n",
3578                                                 __func__,
3579                                                 NFS4_FS_LOCATION_MAXSERVERS,
3580                                                 m, res->nlocations);
3581                                 for (i = loc->nservers; i < m; i++) {
3582                                         unsigned int len;
3583                                         char *data;
3584                                         status = decode_opaque_inline(xdr, &len, &data);
3585                                         if (unlikely(status != 0))
3586                                                 goto out_eio;
3587                                 }
3588                         }
3589                 }
3590                 status = decode_pathname(xdr, &loc->rootpath);
3591                 if (unlikely(status != 0))
3592                         goto out_eio;
3593                 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
3594                         res->nlocations++;
3595         }
3596         if (res->nlocations != 0)
3597                 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3598 out:
3599         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3600         return status;
3601 out_overflow:
3602         print_overflow_msg(__func__, xdr);
3603 out_eio:
3604         status = -EIO;
3605         goto out;
3606 }
3607
3608 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3609 {
3610         __be32 *p;
3611         int status = 0;
3612
3613         *res = 0;
3614         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3615                 return -EIO;
3616         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3617                 p = xdr_inline_decode(xdr, 8);
3618                 if (unlikely(!p))
3619                         goto out_overflow;
3620                 xdr_decode_hyper(p, res);
3621                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3622         }
3623         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3624         return status;
3625 out_overflow:
3626         print_overflow_msg(__func__, xdr);
3627         return -EIO;
3628 }
3629
3630 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3631 {
3632         __be32 *p;
3633         int status = 0;
3634
3635         *maxlink = 1;
3636         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3637                 return -EIO;
3638         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3639                 p = xdr_inline_decode(xdr, 4);
3640                 if (unlikely(!p))
3641                         goto out_overflow;
3642                 *maxlink = be32_to_cpup(p);
3643                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3644         }
3645         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3646         return status;
3647 out_overflow:
3648         print_overflow_msg(__func__, xdr);
3649         return -EIO;
3650 }
3651
3652 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3653 {
3654         __be32 *p;
3655         int status = 0;
3656
3657         *maxname = 1024;
3658         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3659                 return -EIO;
3660         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3661                 p = xdr_inline_decode(xdr, 4);
3662                 if (unlikely(!p))
3663                         goto out_overflow;
3664                 *maxname = be32_to_cpup(p);
3665                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3666         }
3667         dprintk("%s: maxname=%u\n", __func__, *maxname);
3668         return status;
3669 out_overflow:
3670         print_overflow_msg(__func__, xdr);
3671         return -EIO;
3672 }
3673
3674 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3675 {
3676         __be32 *p;
3677         int status = 0;
3678
3679         *res = 1024;
3680         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3681                 return -EIO;
3682         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3683                 uint64_t maxread;
3684                 p = xdr_inline_decode(xdr, 8);
3685                 if (unlikely(!p))
3686                         goto out_overflow;
3687                 xdr_decode_hyper(p, &maxread);
3688                 if (maxread > 0x7FFFFFFF)
3689                         maxread = 0x7FFFFFFF;
3690                 *res = (uint32_t)maxread;
3691                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3692         }
3693         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3694         return status;
3695 out_overflow:
3696         print_overflow_msg(__func__, xdr);
3697         return -EIO;
3698 }
3699
3700 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3701 {
3702         __be32 *p;
3703         int status = 0;
3704
3705         *res = 1024;
3706         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3707                 return -EIO;
3708         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3709                 uint64_t maxwrite;
3710                 p = xdr_inline_decode(xdr, 8);
3711                 if (unlikely(!p))
3712                         goto out_overflow;
3713                 xdr_decode_hyper(p, &maxwrite);
3714                 if (maxwrite > 0x7FFFFFFF)
3715                         maxwrite = 0x7FFFFFFF;
3716                 *res = (uint32_t)maxwrite;
3717                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3718         }
3719         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3720         return status;
3721 out_overflow:
3722         print_overflow_msg(__func__, xdr);
3723         return -EIO;
3724 }
3725
3726 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3727 {
3728         uint32_t tmp;
3729         __be32 *p;
3730         int ret = 0;
3731
3732         *mode = 0;
3733         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3734                 return -EIO;
3735         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3736                 p = xdr_inline_decode(xdr, 4);
3737                 if (unlikely(!p))
3738                         goto out_overflow;
3739                 tmp = be32_to_cpup(p);
3740                 *mode = tmp & ~S_IFMT;
3741                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3742                 ret = NFS_ATTR_FATTR_MODE;
3743         }
3744         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3745         return ret;
3746 out_overflow:
3747         print_overflow_msg(__func__, xdr);
3748         return -EIO;
3749 }
3750
3751 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3752 {
3753         __be32 *p;
3754         int ret = 0;
3755
3756         *nlink = 1;
3757         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3758                 return -EIO;
3759         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3760                 p = xdr_inline_decode(xdr, 4);
3761                 if (unlikely(!p))
3762                         goto out_overflow;
3763                 *nlink = be32_to_cpup(p);
3764                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3765                 ret = NFS_ATTR_FATTR_NLINK;
3766         }
3767         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3768         return ret;
3769 out_overflow:
3770         print_overflow_msg(__func__, xdr);
3771         return -EIO;
3772 }
3773
3774 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3775                 const struct nfs_server *server, uint32_t *uid,
3776                 struct nfs4_string *owner_name)
3777 {
3778         uint32_t len;
3779         __be32 *p;
3780         int ret = 0;
3781
3782         *uid = -2;
3783         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3784                 return -EIO;
3785         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3786                 p = xdr_inline_decode(xdr, 4);
3787                 if (unlikely(!p))
3788                         goto out_overflow;
3789                 len = be32_to_cpup(p);
3790                 p = xdr_inline_decode(xdr, len);
3791                 if (unlikely(!p))
3792                         goto out_overflow;
3793                 if (owner_name != NULL) {
3794                         owner_name->data = kmemdup(p, len, GFP_NOWAIT);
3795                         if (owner_name->data != NULL) {
3796                                 owner_name->len = len;
3797                                 ret = NFS_ATTR_FATTR_OWNER_NAME;
3798                         }
3799                 } else if (len < XDR_MAX_NETOBJ) {
3800                         if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3801                                 ret = NFS_ATTR_FATTR_OWNER;
3802                         else
3803                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3804                                                 __func__);
3805                 } else
3806                         dprintk("%s: name too long (%u)!\n",
3807                                         __func__, len);
3808                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3809         }
3810         dprintk("%s: uid=%d\n", __func__, (int)*uid);
3811         return ret;
3812 out_overflow:
3813         print_overflow_msg(__func__, xdr);
3814         return -EIO;
3815 }
3816
3817 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3818                 const struct nfs_server *server, uint32_t *gid,
3819                 struct nfs4_string *group_name)
3820 {
3821         uint32_t len;
3822         __be32 *p;
3823         int ret = 0;
3824
3825         *gid = -2;
3826         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3827                 return -EIO;
3828         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3829                 p = xdr_inline_decode(xdr, 4);
3830                 if (unlikely(!p))
3831                         goto out_overflow;
3832                 len = be32_to_cpup(p);
3833                 p = xdr_inline_decode(xdr, len);
3834                 if (unlikely(!p))
3835                         goto out_overflow;
3836                 if (group_name != NULL) {
3837                         group_name->data = kmemdup(p, len, GFP_NOWAIT);
3838                         if (group_name->data != NULL) {
3839                                 group_name->len = len;
3840                                 ret = NFS_ATTR_FATTR_GROUP_NAME;
3841                         }
3842                 } else if (len < XDR_MAX_NETOBJ) {
3843                         if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3844                                 ret = NFS_ATTR_FATTR_GROUP;
3845                         else
3846                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3847                                                 __func__);
3848                 } else
3849                         dprintk("%s: name too long (%u)!\n",
3850                                         __func__, len);
3851                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3852         }
3853         dprintk("%s: gid=%d\n", __func__, (int)*gid);
3854         return ret;
3855 out_overflow:
3856         print_overflow_msg(__func__, xdr);
3857         return -EIO;
3858 }
3859
3860 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3861 {
3862         uint32_t major = 0, minor = 0;
3863         __be32 *p;
3864         int ret = 0;
3865
3866         *rdev = MKDEV(0,0);
3867         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3868                 return -EIO;
3869         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3870                 dev_t tmp;
3871
3872                 p = xdr_inline_decode(xdr, 8);
3873                 if (unlikely(!p))
3874                         goto out_overflow;
3875                 major = be32_to_cpup(p++);
3876                 minor = be32_to_cpup(p);
3877                 tmp = MKDEV(major, minor);
3878                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3879                         *rdev = tmp;
3880                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3881                 ret = NFS_ATTR_FATTR_RDEV;
3882         }
3883         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3884         return ret;
3885 out_overflow:
3886         print_overflow_msg(__func__, xdr);
3887         return -EIO;
3888 }
3889
3890 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3891 {
3892         __be32 *p;
3893         int status = 0;
3894
3895         *res = 0;
3896         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3897                 return -EIO;
3898         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3899                 p = xdr_inline_decode(xdr, 8);
3900                 if (unlikely(!p))
3901                         goto out_overflow;
3902                 xdr_decode_hyper(p, res);
3903                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3904         }
3905         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3906         return status;
3907 out_overflow:
3908         print_overflow_msg(__func__, xdr);
3909         return -EIO;
3910 }
3911
3912 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3913 {
3914         __be32 *p;
3915         int status = 0;
3916
3917         *res = 0;
3918         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3919                 return -EIO;
3920         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3921                 p = xdr_inline_decode(xdr, 8);
3922                 if (unlikely(!p))
3923                         goto out_overflow;
3924                 xdr_decode_hyper(p, res);
3925                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3926         }
3927         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3928         return status;
3929 out_overflow:
3930         print_overflow_msg(__func__, xdr);
3931         return -EIO;
3932 }
3933
3934 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3935 {
3936         __be32 *p;
3937         int status = 0;
3938
3939         *res = 0;
3940         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3941                 return -EIO;
3942         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3943                 p = xdr_inline_decode(xdr, 8);
3944                 if (unlikely(!p))
3945                         goto out_overflow;
3946                 xdr_decode_hyper(p, res);
3947                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3948         }
3949         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3950         return status;
3951 out_overflow:
3952         print_overflow_msg(__func__, xdr);
3953         return -EIO;
3954 }
3955
3956 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3957 {
3958         __be32 *p;
3959         int ret = 0;
3960
3961         *used = 0;
3962         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3963                 return -EIO;
3964         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3965                 p = xdr_inline_decode(xdr, 8);
3966                 if (unlikely(!p))
3967                         goto out_overflow;
3968                 xdr_decode_hyper(p, used);
3969                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3970                 ret = NFS_ATTR_FATTR_SPACE_USED;
3971         }
3972         dprintk("%s: space used=%Lu\n", __func__,
3973                         (unsigned long long)*used);
3974         return ret;
3975 out_overflow:
3976         print_overflow_msg(__func__, xdr);
3977         return -EIO;
3978 }
3979
3980 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
3981 {
3982         __be32 *p;
3983         uint64_t sec;
3984         uint32_t nsec;
3985
3986         p = xdr_inline_decode(xdr, 12);
3987         if (unlikely(!p))
3988                 goto out_overflow;
3989         p = xdr_decode_hyper(p, &sec);
3990         nsec = be32_to_cpup(p);
3991         time->tv_sec = (time_t)sec;
3992         time->tv_nsec = (long)nsec;
3993         return 0;
3994 out_overflow:
3995         print_overflow_msg(__func__, xdr);
3996         return -EIO;
3997 }
3998
3999 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4000 {
4001         int status = 0;
4002
4003         time->tv_sec = 0;
4004         time->tv_nsec = 0;
4005         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4006                 return -EIO;
4007         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4008                 status = decode_attr_time(xdr, time);
4009                 if (status == 0)
4010                         status = NFS_ATTR_FATTR_ATIME;
4011                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4012         }
4013         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4014         return status;
4015 }
4016
4017 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4018 {
4019         int status = 0;
4020
4021         time->tv_sec = 0;
4022         time->tv_nsec = 0;
4023         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4024                 return -EIO;
4025         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4026                 status = decode_attr_time(xdr, time);
4027                 if (status == 0)
4028                         status = NFS_ATTR_FATTR_CTIME;
4029                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4030         }
4031         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4032         return status;
4033 }
4034
4035 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4036                                   struct timespec *time)
4037 {
4038         int status = 0;
4039
4040         time->tv_sec = 0;
4041         time->tv_nsec = 0;
4042         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4043                 return -EIO;
4044         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4045                 status = decode_attr_time(xdr, time);
4046                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4047         }
4048         dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4049                 (long)time->tv_nsec);
4050         return status;
4051 }
4052
4053 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4054 {
4055         int status = 0;
4056
4057         time->tv_sec = 0;
4058         time->tv_nsec = 0;
4059         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4060                 return -EIO;
4061         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4062                 status = decode_attr_time(xdr, time);
4063                 if (status == 0)
4064                         status = NFS_ATTR_FATTR_MTIME;
4065                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4066         }
4067         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4068         return status;
4069 }
4070
4071 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
4072 {
4073         unsigned int attrwords = XDR_QUADLEN(attrlen);
4074         unsigned int nwords = xdr->p - savep;
4075
4076         if (unlikely(attrwords != nwords)) {
4077                 dprintk("%s: server returned incorrect attribute length: "
4078                         "%u %c %u\n",
4079                                 __func__,
4080                                 attrwords << 2,
4081                                 (attrwords < nwords) ? '<' : '>',
4082                                 nwords << 2);
4083                 return -EIO;
4084         }
4085         return 0;
4086 }
4087
4088 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4089 {
4090         __be32 *p;
4091
4092         p = xdr_inline_decode(xdr, 20);
4093         if (unlikely(!p))
4094                 goto out_overflow;
4095         cinfo->atomic = be32_to_cpup(p++);
4096         p = xdr_decode_hyper(p, &cinfo->before);
4097         xdr_decode_hyper(p, &cinfo->after);
4098         return 0;
4099 out_overflow:
4100         print_overflow_msg(__func__, xdr);
4101         return -EIO;
4102 }
4103
4104 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
4105 {
4106         __be32 *p;
4107         uint32_t supp, acc;
4108         int status;
4109
4110         status = decode_op_hdr(xdr, OP_ACCESS);
4111         if (status)
4112                 return status;
4113         p = xdr_inline_decode(xdr, 8);
4114         if (unlikely(!p))
4115                 goto out_overflow;
4116         supp = be32_to_cpup(p++);
4117         acc = be32_to_cpup(p);
4118         access->supported = supp;
4119         access->access = acc;
4120         return 0;
4121 out_overflow:
4122         print_overflow_msg(__func__, xdr);
4123         return -EIO;
4124 }
4125
4126 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4127 {
4128         __be32 *p;
4129
4130         p = xdr_inline_decode(xdr, len);
4131         if (likely(p)) {
4132                 memcpy(buf, p, len);
4133                 return 0;
4134         }
4135         print_overflow_msg(__func__, xdr);
4136         return -EIO;
4137 }
4138
4139 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4140 {
4141         return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4142 }
4143
4144 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4145 {
4146         int status;
4147
4148         status = decode_op_hdr(xdr, OP_CLOSE);
4149         if (status != -EIO)
4150                 nfs_increment_open_seqid(status, res->seqid);
4151         if (!status)
4152                 status = decode_stateid(xdr, &res->stateid);
4153         return status;
4154 }
4155
4156 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4157 {
4158         return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4159 }
4160
4161 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4162 {
4163         int status;
4164
4165         status = decode_op_hdr(xdr, OP_COMMIT);
4166         if (!status)
4167                 status = decode_verifier(xdr, res->verf->verifier);
4168         return status;
4169 }
4170
4171 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4172 {
4173         __be32 *p;
4174         uint32_t bmlen;
4175         int status;
4176
4177         status = decode_op_hdr(xdr, OP_CREATE);
4178         if (status)
4179                 return status;
4180         if ((status = decode_change_info(xdr, cinfo)))
4181                 return status;
4182         p = xdr_inline_decode(xdr, 4);
4183         if (unlikely(!p))
4184                 goto out_overflow;
4185         bmlen = be32_to_cpup(p);
4186         p = xdr_inline_decode(xdr, bmlen << 2);
4187         if (likely(p))
4188                 return 0;
4189 out_overflow:
4190         print_overflow_msg(__func__, xdr);
4191         return -EIO;
4192 }
4193
4194 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4195 {
4196         __be32 *savep;
4197         uint32_t attrlen, bitmap[3] = {0};
4198         int status;
4199
4200         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4201                 goto xdr_error;
4202         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4203                 goto xdr_error;
4204         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4205                 goto xdr_error;
4206         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4207                 goto xdr_error;
4208         if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4209                                                  &res->fh_expire_type)) != 0)
4210                 goto xdr_error;
4211         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4212                 goto xdr_error;
4213         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4214                 goto xdr_error;
4215         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4216                 goto xdr_error;
4217         status = verify_attr_len(xdr, savep, attrlen);
4218 xdr_error:
4219         dprintk("%s: xdr returned %d!\n", __func__, -status);
4220         return status;
4221 }
4222
4223 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4224 {
4225         __be32 *savep;
4226         uint32_t attrlen, bitmap[3] = {0};
4227         int status;
4228
4229         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4230                 goto xdr_error;
4231         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4232                 goto xdr_error;
4233         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4234                 goto xdr_error;
4235
4236         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4237                 goto xdr_error;
4238         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4239                 goto xdr_error;
4240         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4241                 goto xdr_error;
4242         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4243                 goto xdr_error;
4244         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4245                 goto xdr_error;
4246         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4247                 goto xdr_error;
4248
4249         status = verify_attr_len(xdr, savep, attrlen);
4250 xdr_error:
4251         dprintk("%s: xdr returned %d!\n", __func__, -status);
4252         return status;
4253 }
4254
4255 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4256 {
4257         __be32 *savep;
4258         uint32_t attrlen, bitmap[3] = {0};
4259         int status;
4260
4261         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4262                 goto xdr_error;
4263         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4264                 goto xdr_error;
4265         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4266                 goto xdr_error;
4267
4268         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4269                 goto xdr_error;
4270         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4271                 goto xdr_error;
4272
4273         status = verify_attr_len(xdr, savep, attrlen);
4274 xdr_error:
4275         dprintk("%s: xdr returned %d!\n", __func__, -status);
4276         return status;
4277 }
4278
4279 static int decode_threshold_hint(struct xdr_stream *xdr,
4280                                   uint32_t *bitmap,
4281                                   uint64_t *res,
4282                                   uint32_t hint_bit)
4283 {
4284         __be32 *p;
4285
4286         *res = 0;
4287         if (likely(bitmap[0] & hint_bit)) {
4288                 p = xdr_inline_decode(xdr, 8);
4289                 if (unlikely(!p))
4290                         goto out_overflow;
4291                 xdr_decode_hyper(p, res);
4292         }
4293         return 0;
4294 out_overflow:
4295         print_overflow_msg(__func__, xdr);
4296         return -EIO;
4297 }
4298
4299 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4300                                         struct nfs4_threshold *res)
4301 {
4302         __be32 *p, *savep;
4303         uint32_t bitmap[3] = {0,}, attrlen;
4304         int status;
4305
4306         /* layout type */
4307         p = xdr_inline_decode(xdr, 4);
4308         if (unlikely(!p)) {
4309                 print_overflow_msg(__func__, xdr);
4310                 return -EIO;
4311         }
4312         res->l_type = be32_to_cpup(p);
4313
4314         /* thi_hintset bitmap */
4315         status = decode_attr_bitmap(xdr, bitmap);
4316         if (status < 0)
4317                 goto xdr_error;
4318
4319         /* thi_hintlist length */
4320         status = decode_attr_length(xdr, &attrlen, &savep);
4321         if (status < 0)
4322                 goto xdr_error;
4323         /* thi_hintlist */
4324         status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4325         if (status < 0)
4326                 goto xdr_error;
4327         status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4328         if (status < 0)
4329                 goto xdr_error;
4330         status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4331                                        THRESHOLD_RD_IO);
4332         if (status < 0)
4333                 goto xdr_error;
4334         status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4335                                        THRESHOLD_WR_IO);
4336         if (status < 0)
4337                 goto xdr_error;
4338
4339         status = verify_attr_len(xdr, savep, attrlen);
4340         res->bm = bitmap[0];
4341
4342         dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4343                  __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4344                 res->wr_io_sz);
4345 xdr_error:
4346         dprintk("%s ret=%d!\n", __func__, status);
4347         return status;
4348 }
4349
4350 /*
4351  * Thresholds on pNFS direct I/O vrs MDS I/O
4352  */
4353 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4354                                     uint32_t *bitmap,
4355                                     struct nfs4_threshold *res)
4356 {
4357         __be32 *p;
4358         int status = 0;
4359         uint32_t num;
4360
4361         if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4362                 return -EIO;
4363         if (likely(bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD)) {
4364                 /* Did the server return an unrequested attribute? */
4365                 if (unlikely(res == NULL))
4366                         return -EREMOTEIO;
4367                 p = xdr_inline_decode(xdr, 4);
4368                 if (unlikely(!p))
4369                         goto out_overflow;
4370                 num = be32_to_cpup(p);
4371                 if (num == 0)
4372                         return 0;
4373                 if (num > 1)
4374                         printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4375                                 "drivers per filesystem not supported\n",
4376                                 __func__);
4377
4378                 status = decode_first_threshold_item4(xdr, res);
4379         }
4380         return status;
4381 out_overflow:
4382         print_overflow_msg(__func__, xdr);
4383         return -EIO;
4384 }
4385
4386 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4387                 struct nfs_fattr *fattr, struct nfs_fh *fh,
4388                 struct nfs4_fs_locations *fs_loc,
4389                 const struct nfs_server *server)
4390 {
4391         int status;
4392         umode_t fmode = 0;
4393         uint32_t type;
4394         int32_t err;
4395
4396         status = decode_attr_type(xdr, bitmap, &type);
4397         if (status < 0)
4398                 goto xdr_error;
4399         fattr->mode = 0;
4400         if (status != 0) {
4401                 fattr->mode |= nfs_type2fmt[type];
4402                 fattr->valid |= status;
4403         }
4404
4405         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4406         if (status < 0)
4407                 goto xdr_error;
4408         fattr->valid |= status;
4409
4410         status = decode_attr_size(xdr, bitmap, &fattr->size);
4411         if (status < 0)
4412                 goto xdr_error;
4413         fattr->valid |= status;
4414
4415         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4416         if (status < 0)
4417                 goto xdr_error;
4418         fattr->valid |= status;
4419
4420         err = 0;
4421         status = decode_attr_error(xdr, bitmap, &err);
4422         if (status < 0)
4423                 goto xdr_error;
4424
4425         status = decode_attr_filehandle(xdr, bitmap, fh);
4426         if (status < 0)
4427                 goto xdr_error;
4428
4429         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4430         if (status < 0)
4431                 goto xdr_error;
4432         fattr->valid |= status;
4433
4434         status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4435         if (status < 0)
4436                 goto xdr_error;
4437         fattr->valid |= status;
4438
4439         status = decode_attr_mode(xdr, bitmap, &fmode);
4440         if (status < 0)
4441                 goto xdr_error;
4442         if (status != 0) {
4443                 fattr->mode |= fmode;
4444                 fattr->valid |= status;
4445         }
4446
4447         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4448         if (status < 0)
4449                 goto xdr_error;
4450         fattr->valid |= status;
4451
4452         status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4453         if (status < 0)
4454                 goto xdr_error;
4455         fattr->valid |= status;
4456
4457         status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4458         if (status < 0)
4459                 goto xdr_error;
4460         fattr->valid |= status;
4461
4462         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4463         if (status < 0)
4464                 goto xdr_error;
4465         fattr->valid |= status;
4466
4467         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4468         if (status < 0)
4469                 goto xdr_error;
4470         fattr->valid |= status;
4471
4472         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4473         if (status < 0)
4474                 goto xdr_error;
4475         fattr->valid |= status;
4476
4477         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4478         if (status < 0)
4479                 goto xdr_error;
4480         fattr->valid |= status;
4481
4482         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4483         if (status < 0)
4484                 goto xdr_error;
4485         fattr->valid |= status;
4486
4487         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4488         if (status < 0)
4489                 goto xdr_error;
4490         fattr->valid |= status;
4491
4492         status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4493         if (status < 0)
4494                 goto xdr_error;
4495
4496 xdr_error:
4497         dprintk("%s: xdr returned %d\n", __func__, -status);
4498         return status;
4499 }
4500
4501 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4502                 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4503                 const struct nfs_server *server)
4504 {
4505         __be32 *savep;
4506         uint32_t attrlen,
4507                  bitmap[3] = {0};
4508         int status;
4509
4510         status = decode_op_hdr(xdr, OP_GETATTR);
4511         if (status < 0)
4512                 goto xdr_error;
4513
4514         status = decode_attr_bitmap(xdr, bitmap);
4515         if (status < 0)
4516                 goto xdr_error;
4517
4518         status = decode_attr_length(xdr, &attrlen, &savep);
4519         if (status < 0)
4520                 goto xdr_error;
4521
4522         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc, server);
4523         if (status < 0)
4524                 goto xdr_error;
4525
4526         status = verify_attr_len(xdr, savep, attrlen);
4527 xdr_error:
4528         dprintk("%s: xdr returned %d\n", __func__, -status);
4529         return status;
4530 }
4531
4532 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4533                 const struct nfs_server *server)
4534 {
4535         return decode_getfattr_generic(xdr, fattr, NULL, NULL, server);
4536 }
4537
4538 /*
4539  * Decode potentially multiple layout types. Currently we only support
4540  * one layout driver per file system.
4541  */
4542 static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4543                                          uint32_t *layouttype)
4544 {
4545         uint32_t *p;
4546         int num;
4547
4548         p = xdr_inline_decode(xdr, 4);
4549         if (unlikely(!p))
4550                 goto out_overflow;
4551         num = be32_to_cpup(p);
4552
4553         /* pNFS is not supported by the underlying file system */
4554         if (num == 0) {
4555                 *layouttype = 0;
4556                 return 0;
4557         }
4558         if (num > 1)
4559                 printk(KERN_INFO "NFS: %s: Warning: Multiple pNFS layout "
4560                         "drivers per filesystem not supported\n", __func__);
4561
4562         /* Decode and set first layout type, move xdr->p past unused types */
4563         p = xdr_inline_decode(xdr, num * 4);
4564         if (unlikely(!p))
4565                 goto out_overflow;
4566         *layouttype = be32_to_cpup(p);
4567         return 0;
4568 out_overflow:
4569         print_overflow_msg(__func__, xdr);
4570         return -EIO;
4571 }
4572
4573 /*
4574  * The type of file system exported.
4575  * Note we must ensure that layouttype is set in any non-error case.
4576  */
4577 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4578                                 uint32_t *layouttype)
4579 {
4580         int status = 0;
4581
4582         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4583         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4584                 return -EIO;
4585         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4586                 status = decode_first_pnfs_layout_type(xdr, layouttype);
4587                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4588         } else
4589                 *layouttype = 0;
4590         return status;
4591 }
4592
4593 /*
4594  * The prefered block size for layout directed io
4595  */
4596 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4597                                       uint32_t *res)
4598 {
4599         __be32 *p;
4600
4601         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4602         *res = 0;
4603         if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4604                 p = xdr_inline_decode(xdr, 4);
4605                 if (unlikely(!p)) {
4606                         print_overflow_msg(__func__, xdr);
4607                         return -EIO;
4608                 }
4609                 *res = be32_to_cpup(p);
4610                 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4611         }
4612         return 0;
4613 }
4614
4615 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4616 {
4617         __be32 *savep;
4618         uint32_t attrlen, bitmap[3];
4619         int status;
4620
4621         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4622                 goto xdr_error;
4623         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4624                 goto xdr_error;
4625         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4626                 goto xdr_error;
4627
4628         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4629
4630         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4631                 goto xdr_error;
4632         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4633                 goto xdr_error;
4634         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4635                 goto xdr_error;
4636         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4637         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4638                 goto xdr_error;
4639         fsinfo->wtpref = fsinfo->wtmax;
4640         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4641         if (status != 0)
4642                 goto xdr_error;
4643         status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4644         if (status != 0)
4645                 goto xdr_error;
4646         status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4647         if (status)
4648                 goto xdr_error;
4649
4650         status = verify_attr_len(xdr, savep, attrlen);
4651 xdr_error:
4652         dprintk("%s: xdr returned %d!\n", __func__, -status);
4653         return status;
4654 }
4655
4656 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4657 {
4658         __be32 *p;
4659         uint32_t len;
4660         int status;
4661
4662         /* Zero handle first to allow comparisons */
4663         memset(fh, 0, sizeof(*fh));
4664
4665         status = decode_op_hdr(xdr, OP_GETFH);
4666         if (status)
4667                 return status;
4668
4669         p = xdr_inline_decode(xdr, 4);
4670         if (unlikely(!p))
4671                 goto out_overflow;
4672         len = be32_to_cpup(p);
4673         if (len > NFS4_FHSIZE)
4674                 return -EIO;
4675         fh->size = len;
4676         p = xdr_inline_decode(xdr, len);
4677         if (unlikely(!p))
4678                 goto out_overflow;
4679         memcpy(fh->data, p, len);
4680         return 0;
4681 out_overflow:
4682         print_overflow_msg(__func__, xdr);
4683         return -EIO;
4684 }
4685
4686 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4687 {
4688         int status;
4689
4690         status = decode_op_hdr(xdr, OP_LINK);
4691         if (status)
4692                 return status;
4693         return decode_change_info(xdr, cinfo);
4694 }
4695
4696 /*
4697  * We create the owner, so we know a proper owner.id length is 4.
4698  */
4699 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4700 {
4701         uint64_t offset, length, clientid;
4702         __be32 *p;
4703         uint32_t namelen, type;
4704
4705         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4706         if (unlikely(!p))
4707                 goto out_overflow;
4708         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4709         p = xdr_decode_hyper(p, &length);
4710         type = be32_to_cpup(p++); /* 4 byte read */
4711         if (fl != NULL) { /* manipulate file lock */
4712                 fl->fl_start = (loff_t)offset;
4713                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4714                 if (length == ~(uint64_t)0)
4715                         fl->fl_end = OFFSET_MAX;
4716                 fl->fl_type = F_WRLCK;
4717                 if (type & 1)
4718                         fl->fl_type = F_RDLCK;
4719                 fl->fl_pid = 0;
4720         }
4721         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4722         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4723         p = xdr_inline_decode(xdr, namelen); /* variable size field */
4724         if (likely(p))
4725                 return -NFS4ERR_DENIED;
4726 out_overflow:
4727         print_overflow_msg(__func__, xdr);
4728         return -EIO;
4729 }
4730
4731 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4732 {
4733         int status;
4734
4735         status = decode_op_hdr(xdr, OP_LOCK);
4736         if (status == -EIO)
4737                 goto out;
4738         if (status == 0) {
4739                 status = decode_stateid(xdr, &res->stateid);
4740                 if (unlikely(status))
4741                         goto out;
4742         } else if (status == -NFS4ERR_DENIED)
4743                 status = decode_lock_denied(xdr, NULL);
4744         if (res->open_seqid != NULL)
4745                 nfs_increment_open_seqid(status, res->open_seqid);
4746         nfs_increment_lock_seqid(status, res->lock_seqid);
4747 out:
4748         return status;
4749 }
4750
4751 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4752 {
4753         int status;
4754         status = decode_op_hdr(xdr, OP_LOCKT);
4755         if (status == -NFS4ERR_DENIED)
4756                 return decode_lock_denied(xdr, res->denied);
4757         return status;
4758 }
4759
4760 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4761 {
4762         int status;
4763
4764         status = decode_op_hdr(xdr, OP_LOCKU);
4765         if (status != -EIO)
4766                 nfs_increment_lock_seqid(status, res->seqid);
4767         if (status == 0)
4768                 status = decode_stateid(xdr, &res->stateid);
4769         return status;
4770 }
4771
4772 static int decode_release_lockowner(struct xdr_stream *xdr)
4773 {
4774         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4775 }
4776
4777 static int decode_lookup(struct xdr_stream *xdr)
4778 {
4779         return decode_op_hdr(xdr, OP_LOOKUP);
4780 }
4781
4782 /* This is too sick! */
4783 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4784 {
4785         __be32 *p;
4786         uint32_t limit_type, nblocks, blocksize;
4787
4788         p = xdr_inline_decode(xdr, 12);
4789         if (unlikely(!p))
4790                 goto out_overflow;
4791         limit_type = be32_to_cpup(p++);
4792         switch (limit_type) {
4793         case 1:
4794                 xdr_decode_hyper(p, maxsize);
4795                 break;
4796         case 2:
4797                 nblocks = be32_to_cpup(p++);
4798                 blocksize = be32_to_cpup(p);
4799                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4800         }
4801         return 0;
4802 out_overflow:
4803         print_overflow_msg(__func__, xdr);
4804         return -EIO;
4805 }
4806
4807 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4808 {
4809         __be32 *p;
4810         uint32_t delegation_type;
4811         int status;
4812
4813         p = xdr_inline_decode(xdr, 4);
4814         if (unlikely(!p))
4815                 goto out_overflow;
4816         delegation_type = be32_to_cpup(p);
4817         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4818                 res->delegation_type = 0;
4819                 return 0;
4820         }
4821         status = decode_stateid(xdr, &res->delegation);
4822         if (unlikely(status))
4823                 return status;
4824         p = xdr_inline_decode(xdr, 4);
4825         if (unlikely(!p))
4826                 goto out_overflow;
4827         res->do_recall = be32_to_cpup(p);
4828
4829         switch (delegation_type) {
4830         case NFS4_OPEN_DELEGATE_READ:
4831                 res->delegation_type = FMODE_READ;
4832                 break;
4833         case NFS4_OPEN_DELEGATE_WRITE:
4834                 res->delegation_type = FMODE_WRITE|FMODE_READ;
4835                 if (decode_space_limit(xdr, &res->maxsize) < 0)
4836                                 return -EIO;
4837         }
4838         return decode_ace(xdr, NULL, res->server->nfs_client);
4839 out_overflow:
4840         print_overflow_msg(__func__, xdr);
4841         return -EIO;
4842 }
4843
4844 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
4845 {
4846         __be32 *p;
4847         uint32_t savewords, bmlen, i;
4848         int status;
4849
4850         status = decode_op_hdr(xdr, OP_OPEN);
4851         if (status != -EIO)
4852                 nfs_increment_open_seqid(status, res->seqid);
4853         if (!status)
4854                 status = decode_stateid(xdr, &res->stateid);
4855         if (unlikely(status))
4856                 return status;
4857
4858         decode_change_info(xdr, &res->cinfo);
4859
4860         p = xdr_inline_decode(xdr, 8);
4861         if (unlikely(!p))
4862                 goto out_overflow;
4863         res->rflags = be32_to_cpup(p++);
4864         bmlen = be32_to_cpup(p);
4865         if (bmlen > 10)
4866                 goto xdr_error;
4867
4868         p = xdr_inline_decode(xdr, bmlen << 2);
4869         if (unlikely(!p))
4870                 goto out_overflow;
4871         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
4872         for (i = 0; i < savewords; ++i)
4873                 res->attrset[i] = be32_to_cpup(p++);
4874         for (; i < NFS4_BITMAP_SIZE; i++)
4875                 res->attrset[i] = 0;
4876
4877         return decode_delegation(xdr, res);
4878 xdr_error:
4879         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
4880         return -EIO;
4881 out_overflow:
4882         print_overflow_msg(__func__, xdr);
4883         return -EIO;
4884 }
4885
4886 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
4887 {
4888         int status;
4889
4890         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
4891         if (status != -EIO)
4892                 nfs_increment_open_seqid(status, res->seqid);
4893         if (!status)
4894                 status = decode_stateid(xdr, &res->stateid);
4895         return status;
4896 }
4897
4898 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
4899 {
4900         int status;
4901
4902         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
4903         if (status != -EIO)
4904                 nfs_increment_open_seqid(status, res->seqid);
4905         if (!status)
4906                 status = decode_stateid(xdr, &res->stateid);
4907         return status;
4908 }
4909
4910 static int decode_putfh(struct xdr_stream *xdr)
4911 {
4912         return decode_op_hdr(xdr, OP_PUTFH);
4913 }
4914
4915 static int decode_putrootfh(struct xdr_stream *xdr)
4916 {
4917         return decode_op_hdr(xdr, OP_PUTROOTFH);
4918 }
4919
4920 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
4921 {
4922         struct kvec *iov = req->rq_rcv_buf.head;
4923         __be32 *p;
4924         uint32_t count, eof, recvd, hdrlen;
4925         int status;
4926
4927         status = decode_op_hdr(xdr, OP_READ);
4928         if (status)
4929                 return status;
4930         p = xdr_inline_decode(xdr, 8);
4931         if (unlikely(!p))
4932                 goto out_overflow;
4933         eof = be32_to_cpup(p++);
4934         count = be32_to_cpup(p);
4935         hdrlen = (u8 *) xdr->p - (u8 *) iov->iov_base;
4936         recvd = req->rq_rcv_buf.len - hdrlen;
4937         if (count > recvd) {
4938                 dprintk("NFS: server cheating in read reply: "
4939                                 "count %u > recvd %u\n", count, recvd);
4940                 count = recvd;
4941                 eof = 0;
4942         }
4943         xdr_read_pages(xdr, count);
4944         res->eof = eof;
4945         res->count = count;
4946         return 0;
4947 out_overflow:
4948         print_overflow_msg(__func__, xdr);
4949         return -EIO;
4950 }
4951
4952 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
4953 {
4954         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
4955         struct kvec     *iov = rcvbuf->head;
4956         size_t          hdrlen;
4957         u32             recvd, pglen = rcvbuf->page_len;
4958         int             status;
4959         __be32          verf[2];
4960
4961         status = decode_op_hdr(xdr, OP_READDIR);
4962         if (!status)
4963                 status = decode_verifier(xdr, readdir->verifier.data);
4964         if (unlikely(status))
4965                 return status;
4966         memcpy(verf, readdir->verifier.data, sizeof(verf));
4967         dprintk("%s: verifier = %08x:%08x\n",
4968                         __func__, verf[0], verf[1]);
4969
4970         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4971         recvd = rcvbuf->len - hdrlen;
4972         if (pglen > recvd)
4973                 pglen = recvd;
4974         xdr_read_pages(xdr, pglen);
4975
4976
4977         return pglen;
4978 }
4979
4980 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
4981 {
4982         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4983         struct kvec *iov = rcvbuf->head;
4984         size_t hdrlen;
4985         u32 len, recvd;
4986         __be32 *p;
4987         int status;
4988
4989         status = decode_op_hdr(xdr, OP_READLINK);
4990         if (status)
4991                 return status;
4992
4993         /* Convert length of symlink */
4994         p = xdr_inline_decode(xdr, 4);
4995         if (unlikely(!p))
4996                 goto out_overflow;
4997         len = be32_to_cpup(p);
4998         if (len >= rcvbuf->page_len || len <= 0) {
4999                 dprintk("nfs: server returned giant symlink!\n");
5000                 return -ENAMETOOLONG;
5001         }
5002         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
5003         recvd = req->rq_rcv_buf.len - hdrlen;
5004         if (recvd < len) {
5005                 dprintk("NFS: server cheating in readlink reply: "
5006                                 "count %u > recvd %u\n", len, recvd);
5007                 return -EIO;
5008         }
5009         xdr_read_pages(xdr, len);
5010         /*
5011          * The XDR encode routine has set things up so that
5012          * the link text will be copied directly into the
5013          * buffer.  We just have to do overflow-checking,
5014          * and and null-terminate the text (the VFS expects
5015          * null-termination).
5016          */
5017         xdr_terminate_string(rcvbuf, len);
5018         return 0;
5019 out_overflow:
5020         print_overflow_msg(__func__, xdr);
5021         return -EIO;
5022 }
5023
5024 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5025 {
5026         int status;
5027
5028         status = decode_op_hdr(xdr, OP_REMOVE);
5029         if (status)
5030                 goto out;
5031         status = decode_change_info(xdr, cinfo);
5032 out:
5033         return status;
5034 }
5035
5036 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5037               struct nfs4_change_info *new_cinfo)
5038 {
5039         int status;
5040
5041         status = decode_op_hdr(xdr, OP_RENAME);
5042         if (status)
5043                 goto out;
5044         if ((status = decode_change_info(xdr, old_cinfo)))
5045                 goto out;
5046         status = decode_change_info(xdr, new_cinfo);
5047 out:
5048         return status;
5049 }
5050
5051 static int decode_renew(struct xdr_stream *xdr)
5052 {
5053         return decode_op_hdr(xdr, OP_RENEW);
5054 }
5055
5056 static int
5057 decode_restorefh(struct xdr_stream *xdr)
5058 {
5059         return decode_op_hdr(xdr, OP_RESTOREFH);
5060 }
5061
5062 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5063                          struct nfs_getaclres *res)
5064 {
5065         __be32 *savep, *bm_p;
5066         uint32_t attrlen,
5067                  bitmap[3] = {0};
5068         struct kvec *iov = req->rq_rcv_buf.head;
5069         int status;
5070         size_t page_len = xdr->buf->page_len;
5071
5072         res->acl_len = 0;
5073         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5074                 goto out;
5075
5076         bm_p = xdr->p;
5077         res->acl_data_offset = be32_to_cpup(bm_p) + 2;
5078         res->acl_data_offset <<= 2;
5079         /* Check if the acl data starts beyond the allocated buffer */
5080         if (res->acl_data_offset > page_len)
5081                 return -ERANGE;
5082
5083         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5084                 goto out;
5085         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5086                 goto out;
5087
5088         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5089                 return -EIO;
5090         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5091                 size_t hdrlen;
5092
5093                 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5094                  * are stored with the acl data to handle the problem of
5095                  * variable length bitmaps.*/
5096                 xdr->p = bm_p;
5097
5098                 /* We ignore &savep and don't do consistency checks on
5099                  * the attr length.  Let userspace figure it out.... */
5100                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
5101                 attrlen += res->acl_data_offset;
5102                 if (attrlen > page_len) {
5103                         if (res->acl_flags & NFS4_ACL_LEN_REQUEST) {
5104                                 /* getxattr interface called with a NULL buf */
5105                                 res->acl_len = attrlen;
5106                                 goto out;
5107                         }
5108                         dprintk("NFS: acl reply: attrlen %u > page_len %zu\n",
5109                                         attrlen, page_len);
5110                         return -EINVAL;
5111                 }
5112                 xdr_read_pages(xdr, attrlen);
5113                 res->acl_len = attrlen;
5114         } else
5115                 status = -EOPNOTSUPP;
5116
5117 out:
5118         return status;
5119 }
5120
5121 static int
5122 decode_savefh(struct xdr_stream *xdr)
5123 {
5124         return decode_op_hdr(xdr, OP_SAVEFH);
5125 }
5126
5127 static int decode_setattr(struct xdr_stream *xdr)
5128 {
5129         __be32 *p;
5130         uint32_t bmlen;
5131         int status;
5132
5133         status = decode_op_hdr(xdr, OP_SETATTR);
5134         if (status)
5135                 return status;
5136         p = xdr_inline_decode(xdr, 4);
5137         if (unlikely(!p))
5138                 goto out_overflow;
5139         bmlen = be32_to_cpup(p);
5140         p = xdr_inline_decode(xdr, bmlen << 2);
5141         if (likely(p))
5142                 return 0;
5143 out_overflow:
5144         print_overflow_msg(__func__, xdr);
5145         return -EIO;
5146 }
5147
5148 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5149 {
5150         __be32 *p;
5151         uint32_t opnum;
5152         int32_t nfserr;
5153
5154         p = xdr_inline_decode(xdr, 8);
5155         if (unlikely(!p))
5156                 goto out_overflow;
5157         opnum = be32_to_cpup(p++);
5158         if (opnum != OP_SETCLIENTID) {
5159                 dprintk("nfs: decode_setclientid: Server returned operation"
5160                         " %d\n", opnum);
5161                 return -EIO;
5162         }
5163         nfserr = be32_to_cpup(p);
5164         if (nfserr == NFS_OK) {
5165                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5166                 if (unlikely(!p))
5167                         goto out_overflow;
5168                 p = xdr_decode_hyper(p, &res->clientid);
5169                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5170         } else if (nfserr == NFSERR_CLID_INUSE) {
5171                 uint32_t len;
5172
5173                 /* skip netid string */
5174                 p = xdr_inline_decode(xdr, 4);
5175                 if (unlikely(!p))
5176                         goto out_overflow;
5177                 len = be32_to_cpup(p);
5178                 p = xdr_inline_decode(xdr, len);
5179                 if (unlikely(!p))
5180                         goto out_overflow;
5181
5182                 /* skip uaddr string */
5183                 p = xdr_inline_decode(xdr, 4);
5184                 if (unlikely(!p))
5185                         goto out_overflow;
5186                 len = be32_to_cpup(p);
5187                 p = xdr_inline_decode(xdr, len);
5188                 if (unlikely(!p))
5189                         goto out_overflow;
5190                 return -NFSERR_CLID_INUSE;
5191         } else
5192                 return nfs4_stat_to_errno(nfserr);
5193
5194         return 0;
5195 out_overflow:
5196         print_overflow_msg(__func__, xdr);
5197         return -EIO;
5198 }
5199
5200 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5201 {
5202         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5203 }
5204
5205 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
5206 {
5207         __be32 *p;
5208         int status;
5209
5210         status = decode_op_hdr(xdr, OP_WRITE);
5211         if (status)
5212                 return status;
5213
5214         p = xdr_inline_decode(xdr, 16);
5215         if (unlikely(!p))
5216                 goto out_overflow;
5217         res->count = be32_to_cpup(p++);
5218         res->verf->committed = be32_to_cpup(p++);
5219         memcpy(res->verf->verifier, p, NFS4_VERIFIER_SIZE);
5220         return 0;
5221 out_overflow:
5222         print_overflow_msg(__func__, xdr);
5223         return -EIO;
5224 }
5225
5226 static int decode_delegreturn(struct xdr_stream *xdr)
5227 {
5228         return decode_op_hdr(xdr, OP_DELEGRETURN);
5229 }
5230
5231 static int decode_secinfo_gss(struct xdr_stream *xdr, struct nfs4_secinfo_flavor *flavor)
5232 {
5233         __be32 *p;
5234
5235         p = xdr_inline_decode(xdr, 4);
5236         if (unlikely(!p))
5237                 goto out_overflow;
5238         flavor->gss.sec_oid4.len = be32_to_cpup(p);
5239         if (flavor->gss.sec_oid4.len > GSS_OID_MAX_LEN)
5240                 goto out_err;
5241
5242         p = xdr_inline_decode(xdr, flavor->gss.sec_oid4.len);
5243         if (unlikely(!p))
5244                 goto out_overflow;
5245         memcpy(flavor->gss.sec_oid4.data, p, flavor->gss.sec_oid4.len);
5246
5247         p = xdr_inline_decode(xdr, 8);
5248         if (unlikely(!p))
5249                 goto out_overflow;
5250         flavor->gss.qop4 = be32_to_cpup(p++);
5251         flavor->gss.service = be32_to_cpup(p);
5252
5253         return 0;
5254
5255 out_overflow:
5256         print_overflow_msg(__func__, xdr);
5257         return -EIO;
5258 out_err:
5259         return -EINVAL;
5260 }
5261
5262 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5263 {
5264         struct nfs4_secinfo_flavor *sec_flavor;
5265         int status;
5266         __be32 *p;
5267         int i, num_flavors;
5268
5269         p = xdr_inline_decode(xdr, 4);
5270         if (unlikely(!p))
5271                 goto out_overflow;
5272
5273         res->flavors->num_flavors = 0;
5274         num_flavors = be32_to_cpup(p);
5275
5276         for (i = 0; i < num_flavors; i++) {
5277                 sec_flavor = &res->flavors->flavors[i];
5278                 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5279                         break;
5280
5281                 p = xdr_inline_decode(xdr, 4);
5282                 if (unlikely(!p))
5283                         goto out_overflow;
5284                 sec_flavor->flavor = be32_to_cpup(p);
5285
5286                 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5287                         status = decode_secinfo_gss(xdr, sec_flavor);
5288                         if (status)
5289                                 goto out;
5290                 }
5291                 res->flavors->num_flavors++;
5292         }
5293
5294         status = 0;
5295 out:
5296         return status;
5297 out_overflow:
5298         print_overflow_msg(__func__, xdr);
5299         return -EIO;
5300 }
5301
5302 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5303 {
5304         int status = decode_op_hdr(xdr, OP_SECINFO);
5305         if (status)
5306                 return status;
5307         return decode_secinfo_common(xdr, res);
5308 }
5309
5310 #if defined(CONFIG_NFS_V4_1)
5311 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5312 {
5313         int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5314         if (status)
5315                 return status;
5316         return decode_secinfo_common(xdr, res);
5317 }
5318
5319 static int decode_exchange_id(struct xdr_stream *xdr,
5320                               struct nfs41_exchange_id_res *res)
5321 {
5322         __be32 *p;
5323         uint32_t dummy;
5324         char *dummy_str;
5325         int status;
5326         uint32_t impl_id_count;
5327
5328         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5329         if (status)
5330                 return status;
5331
5332         p = xdr_inline_decode(xdr, 8);
5333         if (unlikely(!p))
5334                 goto out_overflow;
5335         xdr_decode_hyper(p, &res->clientid);
5336         p = xdr_inline_decode(xdr, 12);
5337         if (unlikely(!p))
5338                 goto out_overflow;
5339         res->seqid = be32_to_cpup(p++);
5340         res->flags = be32_to_cpup(p++);
5341
5342         /* We ask for SP4_NONE */
5343         dummy = be32_to_cpup(p);
5344         if (dummy != SP4_NONE)
5345                 return -EIO;
5346
5347         /* server_owner4.so_minor_id */
5348         p = xdr_inline_decode(xdr, 8);
5349         if (unlikely(!p))
5350                 goto out_overflow;
5351         p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5352
5353         /* server_owner4.so_major_id */
5354         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5355         if (unlikely(status))
5356                 return status;
5357         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5358                 return -EIO;
5359         memcpy(res->server_owner->major_id, dummy_str, dummy);
5360         res->server_owner->major_id_sz = dummy;
5361
5362         /* server_scope4 */
5363         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5364         if (unlikely(status))
5365                 return status;
5366         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5367                 return -EIO;
5368         memcpy(res->server_scope->server_scope, dummy_str, dummy);
5369         res->server_scope->server_scope_sz = dummy;
5370
5371         /* Implementation Id */
5372         p = xdr_inline_decode(xdr, 4);
5373         if (unlikely(!p))
5374                 goto out_overflow;
5375         impl_id_count = be32_to_cpup(p++);
5376
5377         if (impl_id_count) {
5378                 /* nii_domain */
5379                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5380                 if (unlikely(status))
5381                         return status;
5382                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5383                         return -EIO;
5384                 memcpy(res->impl_id->domain, dummy_str, dummy);
5385
5386                 /* nii_name */
5387                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5388                 if (unlikely(status))
5389                         return status;
5390                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5391                         return -EIO;
5392                 memcpy(res->impl_id->name, dummy_str, dummy);
5393
5394                 /* nii_date */
5395                 p = xdr_inline_decode(xdr, 12);
5396                 if (unlikely(!p))
5397                         goto out_overflow;
5398                 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5399                 res->impl_id->date.nseconds = be32_to_cpup(p);
5400
5401                 /* if there's more than one entry, ignore the rest */
5402         }
5403         return 0;
5404 out_overflow:
5405         print_overflow_msg(__func__, xdr);
5406         return -EIO;
5407 }
5408
5409 static int decode_chan_attrs(struct xdr_stream *xdr,
5410                              struct nfs4_channel_attrs *attrs)
5411 {
5412         __be32 *p;
5413         u32 nr_attrs, val;
5414
5415         p = xdr_inline_decode(xdr, 28);
5416         if (unlikely(!p))
5417                 goto out_overflow;
5418         val = be32_to_cpup(p++);        /* headerpadsz */
5419         if (val)
5420                 return -EINVAL;         /* no support for header padding yet */
5421         attrs->max_rqst_sz = be32_to_cpup(p++);
5422         attrs->max_resp_sz = be32_to_cpup(p++);
5423         attrs->max_resp_sz_cached = be32_to_cpup(p++);
5424         attrs->max_ops = be32_to_cpup(p++);
5425         attrs->max_reqs = be32_to_cpup(p++);
5426         nr_attrs = be32_to_cpup(p);
5427         if (unlikely(nr_attrs > 1)) {
5428                 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5429                         "count %u\n", __func__, nr_attrs);
5430                 return -EINVAL;
5431         }
5432         if (nr_attrs == 1) {
5433                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5434                 if (unlikely(!p))
5435                         goto out_overflow;
5436         }
5437         return 0;
5438 out_overflow:
5439         print_overflow_msg(__func__, xdr);
5440         return -EIO;
5441 }
5442
5443 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5444 {
5445         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5446 }
5447
5448 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5449                                 struct nfs41_bind_conn_to_session_res *res)
5450 {
5451         __be32 *p;
5452         int status;
5453
5454         status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5455         if (!status)
5456                 status = decode_sessionid(xdr, &res->session->sess_id);
5457         if (unlikely(status))
5458                 return status;
5459
5460         /* dir flags, rdma mode bool */
5461         p = xdr_inline_decode(xdr, 8);
5462         if (unlikely(!p))
5463                 goto out_overflow;
5464
5465         res->dir = be32_to_cpup(p++);
5466         if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5467                 return -EIO;
5468         if (be32_to_cpup(p) == 0)
5469                 res->use_conn_in_rdma_mode = false;
5470         else
5471                 res->use_conn_in_rdma_mode = true;
5472
5473         return 0;
5474 out_overflow:
5475         print_overflow_msg(__func__, xdr);
5476         return -EIO;
5477 }
5478
5479 static int decode_create_session(struct xdr_stream *xdr,
5480                                  struct nfs41_create_session_res *res)
5481 {
5482         __be32 *p;
5483         int status;
5484         struct nfs_client *clp = res->client;
5485         struct nfs4_session *session = clp->cl_session;
5486
5487         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5488         if (!status)
5489                 status = decode_sessionid(xdr, &session->sess_id);
5490         if (unlikely(status))
5491                 return status;
5492
5493         /* seqid, flags */
5494         p = xdr_inline_decode(xdr, 8);
5495         if (unlikely(!p))
5496                 goto out_overflow;
5497         clp->cl_seqid = be32_to_cpup(p++);
5498         session->flags = be32_to_cpup(p);
5499
5500         /* Channel attributes */
5501         status = decode_chan_attrs(xdr, &session->fc_attrs);
5502         if (!status)
5503                 status = decode_chan_attrs(xdr, &session->bc_attrs);
5504         return status;
5505 out_overflow:
5506         print_overflow_msg(__func__, xdr);
5507         return -EIO;
5508 }
5509
5510 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5511 {
5512         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5513 }
5514
5515 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5516 {
5517         return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5518 }
5519
5520 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5521 {
5522         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5523 }
5524 #endif /* CONFIG_NFS_V4_1 */
5525
5526 static int decode_sequence(struct xdr_stream *xdr,
5527                            struct nfs4_sequence_res *res,
5528                            struct rpc_rqst *rqstp)
5529 {
5530 #if defined(CONFIG_NFS_V4_1)
5531         struct nfs4_sessionid id;
5532         u32 dummy;
5533         int status;
5534         __be32 *p;
5535
5536         if (!res->sr_session)
5537                 return 0;
5538
5539         status = decode_op_hdr(xdr, OP_SEQUENCE);
5540         if (!status)
5541                 status = decode_sessionid(xdr, &id);
5542         if (unlikely(status))
5543                 goto out_err;
5544
5545         /*
5546          * If the server returns different values for sessionID, slotID or
5547          * sequence number, the server is looney tunes.
5548          */
5549         status = -EREMOTEIO;
5550
5551         if (memcmp(id.data, res->sr_session->sess_id.data,
5552                    NFS4_MAX_SESSIONID_LEN)) {
5553                 dprintk("%s Invalid session id\n", __func__);
5554                 goto out_err;
5555         }
5556
5557         p = xdr_inline_decode(xdr, 20);
5558         if (unlikely(!p))
5559                 goto out_overflow;
5560
5561         /* seqid */
5562         dummy = be32_to_cpup(p++);
5563         if (dummy != res->sr_slot->seq_nr) {
5564                 dprintk("%s Invalid sequence number\n", __func__);
5565                 goto out_err;
5566         }
5567         /* slot id */
5568         dummy = be32_to_cpup(p++);
5569         if (dummy != res->sr_slot - res->sr_session->fc_slot_table.slots) {
5570                 dprintk("%s Invalid slot id\n", __func__);
5571                 goto out_err;
5572         }
5573         /* highest slot id - currently not processed */
5574         dummy = be32_to_cpup(p++);
5575         /* target highest slot id - currently not processed */
5576         dummy = be32_to_cpup(p++);
5577         /* result flags */
5578         res->sr_status_flags = be32_to_cpup(p);
5579         status = 0;
5580 out_err:
5581         res->sr_status = status;
5582         return status;
5583 out_overflow:
5584         print_overflow_msg(__func__, xdr);
5585         status = -EIO;
5586         goto out_err;
5587 #else  /* CONFIG_NFS_V4_1 */
5588         return 0;
5589 #endif /* CONFIG_NFS_V4_1 */
5590 }
5591
5592 #if defined(CONFIG_NFS_V4_1)
5593 /*
5594  * TODO: Need to handle case when EOF != true;
5595  */
5596 static int decode_getdevicelist(struct xdr_stream *xdr,
5597                                 struct pnfs_devicelist *res)
5598 {
5599         __be32 *p;
5600         int status, i;
5601         struct nfs_writeverf verftemp;
5602
5603         status = decode_op_hdr(xdr, OP_GETDEVICELIST);
5604         if (status)
5605                 return status;
5606
5607         p = xdr_inline_decode(xdr, 8 + 8 + 4);
5608         if (unlikely(!p))
5609                 goto out_overflow;
5610
5611         /* TODO: Skip cookie for now */
5612         p += 2;
5613
5614         /* Read verifier */
5615         p = xdr_decode_opaque_fixed(p, verftemp.verifier, NFS4_VERIFIER_SIZE);
5616
5617         res->num_devs = be32_to_cpup(p);
5618
5619         dprintk("%s: num_dev %d\n", __func__, res->num_devs);
5620
5621         if (res->num_devs > NFS4_PNFS_GETDEVLIST_MAXNUM) {
5622                 printk(KERN_ERR "NFS: %s too many result dev_num %u\n",
5623                                 __func__, res->num_devs);
5624                 return -EIO;
5625         }
5626
5627         p = xdr_inline_decode(xdr,
5628                               res->num_devs * NFS4_DEVICEID4_SIZE + 4);
5629         if (unlikely(!p))
5630                 goto out_overflow;
5631         for (i = 0; i < res->num_devs; i++)
5632                 p = xdr_decode_opaque_fixed(p, res->dev_id[i].data,
5633                                             NFS4_DEVICEID4_SIZE);
5634         res->eof = be32_to_cpup(p);
5635         return 0;
5636 out_overflow:
5637         print_overflow_msg(__func__, xdr);
5638         return -EIO;
5639 }
5640
5641 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5642                                 struct pnfs_device *pdev)
5643 {
5644         __be32 *p;
5645         uint32_t len, type;
5646         int status;
5647
5648         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5649         if (status) {
5650                 if (status == -ETOOSMALL) {
5651                         p = xdr_inline_decode(xdr, 4);
5652                         if (unlikely(!p))
5653                                 goto out_overflow;
5654                         pdev->mincount = be32_to_cpup(p);
5655                         dprintk("%s: Min count too small. mincnt = %u\n",
5656                                 __func__, pdev->mincount);
5657                 }
5658                 return status;
5659         }
5660
5661         p = xdr_inline_decode(xdr, 8);
5662         if (unlikely(!p))
5663                 goto out_overflow;
5664         type = be32_to_cpup(p++);
5665         if (type != pdev->layout_type) {
5666                 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5667                         __func__, pdev->layout_type, type);
5668                 return -EINVAL;
5669         }
5670         /*
5671          * Get the length of the opaque device_addr4. xdr_read_pages places
5672          * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5673          * and places the remaining xdr data in xdr_buf->tail
5674          */
5675         pdev->mincount = be32_to_cpup(p);
5676         xdr_read_pages(xdr, pdev->mincount); /* include space for the length */
5677
5678         /* Parse notification bitmap, verifying that it is zero. */
5679         p = xdr_inline_decode(xdr, 4);
5680         if (unlikely(!p))
5681                 goto out_overflow;
5682         len = be32_to_cpup(p);
5683         if (len) {
5684                 uint32_t i;
5685
5686                 p = xdr_inline_decode(xdr, 4 * len);
5687                 if (unlikely(!p))
5688                         goto out_overflow;
5689                 for (i = 0; i < len; i++, p++) {
5690                         if (be32_to_cpup(p)) {
5691                                 dprintk("%s: notifications not supported\n",
5692                                         __func__);
5693                                 return -EIO;
5694                         }
5695                 }
5696         }
5697         return 0;
5698 out_overflow:
5699         print_overflow_msg(__func__, xdr);
5700         return -EIO;
5701 }
5702
5703 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5704                             struct nfs4_layoutget_res *res)
5705 {
5706         __be32 *p;
5707         int status;
5708         u32 layout_count;
5709         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5710         struct kvec *iov = rcvbuf->head;
5711         u32 hdrlen, recvd;
5712
5713         status = decode_op_hdr(xdr, OP_LAYOUTGET);
5714         if (status)
5715                 return status;
5716         p = xdr_inline_decode(xdr, 4);
5717         if (unlikely(!p))
5718                 goto out_overflow;
5719         res->return_on_close = be32_to_cpup(p);
5720         decode_stateid(xdr, &res->stateid);
5721         p = xdr_inline_decode(xdr, 4);
5722         if (unlikely(!p))
5723                 goto out_overflow;
5724         layout_count = be32_to_cpup(p);
5725         if (!layout_count) {
5726                 dprintk("%s: server responded with empty layout array\n",
5727                         __func__);
5728                 return -EINVAL;
5729         }
5730
5731         p = xdr_inline_decode(xdr, 28);
5732         if (unlikely(!p))
5733                 goto out_overflow;
5734         p = xdr_decode_hyper(p, &res->range.offset);
5735         p = xdr_decode_hyper(p, &res->range.length);
5736         res->range.iomode = be32_to_cpup(p++);
5737         res->type = be32_to_cpup(p++);
5738         res->layoutp->len = be32_to_cpup(p);
5739
5740         dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5741                 __func__,
5742                 (unsigned long)res->range.offset,
5743                 (unsigned long)res->range.length,
5744                 res->range.iomode,
5745                 res->type,
5746                 res->layoutp->len);
5747
5748         hdrlen = (u8 *) xdr->p - (u8 *) iov->iov_base;
5749         recvd = req->rq_rcv_buf.len - hdrlen;
5750         if (res->layoutp->len > recvd) {
5751                 dprintk("NFS: server cheating in layoutget reply: "
5752                                 "layout len %u > recvd %u\n",
5753                                 res->layoutp->len, recvd);
5754                 return -EINVAL;
5755         }
5756
5757         xdr_read_pages(xdr, res->layoutp->len);
5758
5759         if (layout_count > 1) {
5760                 /* We only handle a length one array at the moment.  Any
5761                  * further entries are just ignored.  Note that this means
5762                  * the client may see a response that is less than the
5763                  * minimum it requested.
5764                  */
5765                 dprintk("%s: server responded with %d layouts, dropping tail\n",
5766                         __func__, layout_count);
5767         }
5768
5769         return 0;
5770 out_overflow:
5771         print_overflow_msg(__func__, xdr);
5772         return -EIO;
5773 }
5774
5775 static int decode_layoutreturn(struct xdr_stream *xdr,
5776                                struct nfs4_layoutreturn_res *res)
5777 {
5778         __be32 *p;
5779         int status;
5780
5781         status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5782         if (status)
5783                 return status;
5784         p = xdr_inline_decode(xdr, 4);
5785         if (unlikely(!p))
5786                 goto out_overflow;
5787         res->lrs_present = be32_to_cpup(p);
5788         if (res->lrs_present)
5789                 status = decode_stateid(xdr, &res->stateid);
5790         return status;
5791 out_overflow:
5792         print_overflow_msg(__func__, xdr);
5793         return -EIO;
5794 }
5795
5796 static int decode_layoutcommit(struct xdr_stream *xdr,
5797                                struct rpc_rqst *req,
5798                                struct nfs4_layoutcommit_res *res)
5799 {
5800         __be32 *p;
5801         __u32 sizechanged;
5802         int status;
5803
5804         status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5805         res->status = status;
5806         if (status)
5807                 return status;
5808
5809         p = xdr_inline_decode(xdr, 4);
5810         if (unlikely(!p))
5811                 goto out_overflow;
5812         sizechanged = be32_to_cpup(p);
5813
5814         if (sizechanged) {
5815                 /* throw away new size */
5816                 p = xdr_inline_decode(xdr, 8);
5817                 if (unlikely(!p))
5818                         goto out_overflow;
5819         }
5820         return 0;
5821 out_overflow:
5822         print_overflow_msg(__func__, xdr);
5823         return -EIO;
5824 }
5825
5826 static int decode_test_stateid(struct xdr_stream *xdr,
5827                                struct nfs41_test_stateid_res *res)
5828 {
5829         __be32 *p;
5830         int status;
5831         int num_res;
5832
5833         status = decode_op_hdr(xdr, OP_TEST_STATEID);
5834         if (status)
5835                 return status;
5836
5837         p = xdr_inline_decode(xdr, 4);
5838         if (unlikely(!p))
5839                 goto out_overflow;
5840         num_res = be32_to_cpup(p++);
5841         if (num_res != 1)
5842                 goto out;
5843
5844         p = xdr_inline_decode(xdr, 4);
5845         if (unlikely(!p))
5846                 goto out_overflow;
5847         res->status = be32_to_cpup(p++);
5848
5849         return status;
5850 out_overflow:
5851         print_overflow_msg(__func__, xdr);
5852 out:
5853         return -EIO;
5854 }
5855
5856 static int decode_free_stateid(struct xdr_stream *xdr,
5857                                struct nfs41_free_stateid_res *res)
5858 {
5859         __be32 *p;
5860         int status;
5861
5862         status = decode_op_hdr(xdr, OP_FREE_STATEID);
5863         if (status)
5864                 return status;
5865
5866         p = xdr_inline_decode(xdr, 4);
5867         if (unlikely(!p))
5868                 goto out_overflow;
5869         res->status = be32_to_cpup(p++);
5870         return res->status;
5871 out_overflow:
5872         print_overflow_msg(__func__, xdr);
5873         return -EIO;
5874 }
5875 #endif /* CONFIG_NFS_V4_1 */
5876
5877 /*
5878  * END OF "GENERIC" DECODE ROUTINES.
5879  */
5880
5881 /*
5882  * Decode OPEN_DOWNGRADE response
5883  */
5884 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
5885                                        struct xdr_stream *xdr,
5886                                        struct nfs_closeres *res)
5887 {
5888         struct compound_hdr hdr;
5889         int status;
5890
5891         status = decode_compound_hdr(xdr, &hdr);
5892         if (status)
5893                 goto out;
5894         status = decode_sequence(xdr, &res->seq_res, rqstp);
5895         if (status)
5896                 goto out;
5897         status = decode_putfh(xdr);
5898         if (status)
5899                 goto out;
5900         status = decode_open_downgrade(xdr, res);
5901         if (status != 0)
5902                 goto out;
5903         decode_getfattr(xdr, res->fattr, res->server);
5904 out:
5905         return status;
5906 }
5907
5908 /*
5909  * Decode ACCESS response
5910  */
5911 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5912                                struct nfs4_accessres *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 != 0)
5925                 goto out;
5926         status = decode_access(xdr, res);
5927         if (status != 0)
5928                 goto out;
5929         decode_getfattr(xdr, res->fattr, res->server);
5930 out:
5931         return status;
5932 }
5933
5934 /*
5935  * Decode LOOKUP response
5936  */
5937 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5938                                struct nfs4_lookup_res *res)
5939 {
5940         struct compound_hdr hdr;
5941         int status;
5942
5943         status = decode_compound_hdr(xdr, &hdr);
5944         if (status)
5945                 goto out;
5946         status = decode_sequence(xdr, &res->seq_res, rqstp);
5947         if (status)
5948                 goto out;
5949         status = decode_putfh(xdr);
5950         if (status)
5951                 goto out;
5952         status = decode_lookup(xdr);
5953         if (status)
5954                 goto out;
5955         status = decode_getfh(xdr, res->fh);
5956         if (status)
5957                 goto out;
5958         status = decode_getfattr(xdr, res->fattr, res->server);
5959 out:
5960         return status;
5961 }
5962
5963 /*
5964  * Decode LOOKUP_ROOT response
5965  */
5966 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
5967                                     struct xdr_stream *xdr,
5968                                     struct nfs4_lookup_res *res)
5969 {
5970         struct compound_hdr hdr;
5971         int status;
5972
5973         status = decode_compound_hdr(xdr, &hdr);
5974         if (status)
5975                 goto out;
5976         status = decode_sequence(xdr, &res->seq_res, rqstp);
5977         if (status)
5978                 goto out;
5979         status = decode_putrootfh(xdr);
5980         if (status)
5981                 goto out;
5982         status = decode_getfh(xdr, res->fh);
5983         if (status == 0)
5984                 status = decode_getfattr(xdr, res->fattr, res->server);
5985 out:
5986         return status;
5987 }
5988
5989 /*
5990  * Decode REMOVE response
5991  */
5992 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5993                                struct nfs_removeres *res)
5994 {
5995         struct compound_hdr hdr;
5996         int status;
5997
5998         status = decode_compound_hdr(xdr, &hdr);
5999         if (status)
6000                 goto out;
6001         status = decode_sequence(xdr, &res->seq_res, rqstp);
6002         if (status)
6003                 goto out;
6004         status = decode_putfh(xdr);
6005         if (status)
6006                 goto out;
6007         status = decode_remove(xdr, &res->cinfo);
6008 out:
6009         return status;
6010 }
6011
6012 /*
6013  * Decode RENAME response
6014  */
6015 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6016                                struct nfs_renameres *res)
6017 {
6018         struct compound_hdr hdr;
6019         int status;
6020
6021         status = decode_compound_hdr(xdr, &hdr);
6022         if (status)
6023                 goto out;
6024         status = decode_sequence(xdr, &res->seq_res, rqstp);
6025         if (status)
6026                 goto out;
6027         status = decode_putfh(xdr);
6028         if (status)
6029                 goto out;
6030         status = decode_savefh(xdr);
6031         if (status)
6032                 goto out;
6033         status = decode_putfh(xdr);
6034         if (status)
6035                 goto out;
6036         status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6037 out:
6038         return status;
6039 }
6040
6041 /*
6042  * Decode LINK response
6043  */
6044 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6045                              struct nfs4_link_res *res)
6046 {
6047         struct compound_hdr hdr;
6048         int status;
6049
6050         status = decode_compound_hdr(xdr, &hdr);
6051         if (status)
6052                 goto out;
6053         status = decode_sequence(xdr, &res->seq_res, rqstp);
6054         if (status)
6055                 goto out;
6056         status = decode_putfh(xdr);
6057         if (status)
6058                 goto out;
6059         status = decode_savefh(xdr);
6060         if (status)
6061                 goto out;
6062         status = decode_putfh(xdr);
6063         if (status)
6064                 goto out;
6065         status = decode_link(xdr, &res->cinfo);
6066         if (status)
6067                 goto out;
6068         /*
6069          * Note order: OP_LINK leaves the directory as the current
6070          *             filehandle.
6071          */
6072         status = decode_restorefh(xdr);
6073         if (status)
6074                 goto out;
6075         decode_getfattr(xdr, res->fattr, res->server);
6076 out:
6077         return status;
6078 }
6079
6080 /*
6081  * Decode CREATE response
6082  */
6083 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6084                                struct nfs4_create_res *res)
6085 {
6086         struct compound_hdr hdr;
6087         int status;
6088
6089         status = decode_compound_hdr(xdr, &hdr);
6090         if (status)
6091                 goto out;
6092         status = decode_sequence(xdr, &res->seq_res, rqstp);
6093         if (status)
6094                 goto out;
6095         status = decode_putfh(xdr);
6096         if (status)
6097                 goto out;
6098         status = decode_create(xdr, &res->dir_cinfo);
6099         if (status)
6100                 goto out;
6101         status = decode_getfh(xdr, res->fh);
6102         if (status)
6103                 goto out;
6104         decode_getfattr(xdr, res->fattr, res->server);
6105 out:
6106         return status;
6107 }
6108
6109 /*
6110  * Decode SYMLINK response
6111  */
6112 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6113                                 struct nfs4_create_res *res)
6114 {
6115         return nfs4_xdr_dec_create(rqstp, xdr, res);
6116 }
6117
6118 /*
6119  * Decode GETATTR response
6120  */
6121 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6122                                 struct nfs4_getattr_res *res)
6123 {
6124         struct compound_hdr hdr;
6125         int status;
6126
6127         status = decode_compound_hdr(xdr, &hdr);
6128         if (status)
6129                 goto out;
6130         status = decode_sequence(xdr, &res->seq_res, rqstp);
6131         if (status)
6132                 goto out;
6133         status = decode_putfh(xdr);
6134         if (status)
6135                 goto out;
6136         status = decode_getfattr(xdr, res->fattr, res->server);
6137 out:
6138         return status;
6139 }
6140
6141 /*
6142  * Encode an SETACL request
6143  */
6144 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6145                                 struct nfs_setaclargs *args)
6146 {
6147         struct compound_hdr hdr = {
6148                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6149         };
6150
6151         encode_compound_hdr(xdr, req, &hdr);
6152         encode_sequence(xdr, &args->seq_args, &hdr);
6153         encode_putfh(xdr, args->fh, &hdr);
6154         encode_setacl(xdr, args, &hdr);
6155         encode_nops(&hdr);
6156 }
6157
6158 /*
6159  * Decode SETACL response
6160  */
6161 static int
6162 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6163                     struct nfs_setaclres *res)
6164 {
6165         struct compound_hdr hdr;
6166         int status;
6167
6168         status = decode_compound_hdr(xdr, &hdr);
6169         if (status)
6170                 goto out;
6171         status = decode_sequence(xdr, &res->seq_res, rqstp);
6172         if (status)
6173                 goto out;
6174         status = decode_putfh(xdr);
6175         if (status)
6176                 goto out;
6177         status = decode_setattr(xdr);
6178 out:
6179         return status;
6180 }
6181
6182 /*
6183  * Decode GETACL response
6184  */
6185 static int
6186 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6187                     struct nfs_getaclres *res)
6188 {
6189         struct compound_hdr hdr;
6190         int status;
6191
6192         if (res->acl_scratch != NULL) {
6193                 void *p = page_address(res->acl_scratch);
6194                 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6195         }
6196         status = decode_compound_hdr(xdr, &hdr);
6197         if (status)
6198                 goto out;
6199         status = decode_sequence(xdr, &res->seq_res, rqstp);
6200         if (status)
6201                 goto out;
6202         status = decode_putfh(xdr);
6203         if (status)
6204                 goto out;
6205         status = decode_getacl(xdr, rqstp, res);
6206
6207 out:
6208         return status;
6209 }
6210
6211 /*
6212  * Decode CLOSE response
6213  */
6214 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6215                               struct nfs_closeres *res)
6216 {
6217         struct compound_hdr hdr;
6218         int status;
6219
6220         status = decode_compound_hdr(xdr, &hdr);
6221         if (status)
6222                 goto out;
6223         status = decode_sequence(xdr, &res->seq_res, rqstp);
6224         if (status)
6225                 goto out;
6226         status = decode_putfh(xdr);
6227         if (status)
6228                 goto out;
6229         status = decode_close(xdr, res);
6230         if (status != 0)
6231                 goto out;
6232         /*
6233          * Note: Server may do delete on close for this file
6234          *      in which case the getattr call will fail with
6235          *      an ESTALE error. Shouldn't be a problem,
6236          *      though, since fattr->valid will remain unset.
6237          */
6238         decode_getfattr(xdr, res->fattr, res->server);
6239 out:
6240         return status;
6241 }
6242
6243 /*
6244  * Decode OPEN response
6245  */
6246 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6247                              struct nfs_openres *res)
6248 {
6249         struct compound_hdr hdr;
6250         int status;
6251
6252         status = decode_compound_hdr(xdr, &hdr);
6253         if (status)
6254                 goto out;
6255         status = decode_sequence(xdr, &res->seq_res, rqstp);
6256         if (status)
6257                 goto out;
6258         status = decode_putfh(xdr);
6259         if (status)
6260                 goto out;
6261         status = decode_open(xdr, res);
6262         if (status)
6263                 goto out;
6264         if (decode_getfh(xdr, &res->fh) != 0)
6265                 goto out;
6266         decode_getfattr(xdr, res->f_attr, res->server);
6267 out:
6268         return status;
6269 }
6270
6271 /*
6272  * Decode OPEN_CONFIRM response
6273  */
6274 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6275                                      struct xdr_stream *xdr,
6276                                      struct nfs_open_confirmres *res)
6277 {
6278         struct compound_hdr hdr;
6279         int status;
6280
6281         status = decode_compound_hdr(xdr, &hdr);
6282         if (status)
6283                 goto out;
6284         status = decode_putfh(xdr);
6285         if (status)
6286                 goto out;
6287         status = decode_open_confirm(xdr, res);
6288 out:
6289         return status;
6290 }
6291
6292 /*
6293  * Decode OPEN response
6294  */
6295 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6296                                     struct xdr_stream *xdr,
6297                                     struct nfs_openres *res)
6298 {
6299         struct compound_hdr hdr;
6300         int status;
6301
6302         status = decode_compound_hdr(xdr, &hdr);
6303         if (status)
6304                 goto out;
6305         status = decode_sequence(xdr, &res->seq_res, rqstp);
6306         if (status)
6307                 goto out;
6308         status = decode_putfh(xdr);
6309         if (status)
6310                 goto out;
6311         status = decode_open(xdr, res);
6312         if (status)
6313                 goto out;
6314         decode_getfattr(xdr, res->f_attr, res->server);
6315 out:
6316         return status;
6317 }
6318
6319 /*
6320  * Decode SETATTR response
6321  */
6322 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6323                                 struct xdr_stream *xdr,
6324                                 struct nfs_setattrres *res)
6325 {
6326         struct compound_hdr hdr;
6327         int status;
6328
6329         status = decode_compound_hdr(xdr, &hdr);
6330         if (status)
6331                 goto out;
6332         status = decode_sequence(xdr, &res->seq_res, rqstp);
6333         if (status)
6334                 goto out;
6335         status = decode_putfh(xdr);
6336         if (status)
6337                 goto out;
6338         status = decode_setattr(xdr);
6339         if (status)
6340                 goto out;
6341         decode_getfattr(xdr, res->fattr, res->server);
6342 out:
6343         return status;
6344 }
6345
6346 /*
6347  * Decode LOCK response
6348  */
6349 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6350                              struct nfs_lock_res *res)
6351 {
6352         struct compound_hdr hdr;
6353         int status;
6354
6355         status = decode_compound_hdr(xdr, &hdr);
6356         if (status)
6357                 goto out;
6358         status = decode_sequence(xdr, &res->seq_res, rqstp);
6359         if (status)
6360                 goto out;
6361         status = decode_putfh(xdr);
6362         if (status)
6363                 goto out;
6364         status = decode_lock(xdr, res);
6365 out:
6366         return status;
6367 }
6368
6369 /*
6370  * Decode LOCKT response
6371  */
6372 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6373                               struct nfs_lockt_res *res)
6374 {
6375         struct compound_hdr hdr;
6376         int status;
6377
6378         status = decode_compound_hdr(xdr, &hdr);
6379         if (status)
6380                 goto out;
6381         status = decode_sequence(xdr, &res->seq_res, rqstp);
6382         if (status)
6383                 goto out;
6384         status = decode_putfh(xdr);
6385         if (status)
6386                 goto out;
6387         status = decode_lockt(xdr, res);
6388 out:
6389         return status;
6390 }
6391
6392 /*
6393  * Decode LOCKU response
6394  */
6395 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6396                               struct nfs_locku_res *res)
6397 {
6398         struct compound_hdr hdr;
6399         int status;
6400
6401         status = decode_compound_hdr(xdr, &hdr);
6402         if (status)
6403                 goto out;
6404         status = decode_sequence(xdr, &res->seq_res, rqstp);
6405         if (status)
6406                 goto out;
6407         status = decode_putfh(xdr);
6408         if (status)
6409                 goto out;
6410         status = decode_locku(xdr, res);
6411 out:
6412         return status;
6413 }
6414
6415 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6416                                           struct xdr_stream *xdr, void *dummy)
6417 {
6418         struct compound_hdr hdr;
6419         int status;
6420
6421         status = decode_compound_hdr(xdr, &hdr);
6422         if (!status)
6423                 status = decode_release_lockowner(xdr);
6424         return status;
6425 }
6426
6427 /*
6428  * Decode READLINK response
6429  */
6430 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6431                                  struct xdr_stream *xdr,
6432                                  struct nfs4_readlink_res *res)
6433 {
6434         struct compound_hdr hdr;
6435         int status;
6436
6437         status = decode_compound_hdr(xdr, &hdr);
6438         if (status)
6439                 goto out;
6440         status = decode_sequence(xdr, &res->seq_res, rqstp);
6441         if (status)
6442                 goto out;
6443         status = decode_putfh(xdr);
6444         if (status)
6445                 goto out;
6446         status = decode_readlink(xdr, rqstp);
6447 out:
6448         return status;
6449 }
6450
6451 /*
6452  * Decode READDIR response
6453  */
6454 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6455                                 struct nfs4_readdir_res *res)
6456 {
6457         struct compound_hdr hdr;
6458         int status;
6459
6460         status = decode_compound_hdr(xdr, &hdr);
6461         if (status)
6462                 goto out;
6463         status = decode_sequence(xdr, &res->seq_res, rqstp);
6464         if (status)
6465                 goto out;
6466         status = decode_putfh(xdr);
6467         if (status)
6468                 goto out;
6469         status = decode_readdir(xdr, rqstp, res);
6470 out:
6471         return status;
6472 }
6473
6474 /*
6475  * Decode Read response
6476  */
6477 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6478                              struct nfs_readres *res)
6479 {
6480         struct compound_hdr hdr;
6481         int status;
6482
6483         status = decode_compound_hdr(xdr, &hdr);
6484         if (status)
6485                 goto out;
6486         status = decode_sequence(xdr, &res->seq_res, rqstp);
6487         if (status)
6488                 goto out;
6489         status = decode_putfh(xdr);
6490         if (status)
6491                 goto out;
6492         status = decode_read(xdr, rqstp, res);
6493         if (!status)
6494                 status = res->count;
6495 out:
6496         return status;
6497 }
6498
6499 /*
6500  * Decode WRITE response
6501  */
6502 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6503                               struct nfs_writeres *res)
6504 {
6505         struct compound_hdr hdr;
6506         int status;
6507
6508         status = decode_compound_hdr(xdr, &hdr);
6509         if (status)
6510                 goto out;
6511         status = decode_sequence(xdr, &res->seq_res, rqstp);
6512         if (status)
6513                 goto out;
6514         status = decode_putfh(xdr);
6515         if (status)
6516                 goto out;
6517         status = decode_write(xdr, res);
6518         if (status)
6519                 goto out;
6520         if (res->fattr)
6521                 decode_getfattr(xdr, res->fattr, res->server);
6522         if (!status)
6523                 status = res->count;
6524 out:
6525         return status;
6526 }
6527
6528 /*
6529  * Decode COMMIT response
6530  */
6531 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6532                                struct nfs_commitres *res)
6533 {
6534         struct compound_hdr hdr;
6535         int status;
6536
6537         status = decode_compound_hdr(xdr, &hdr);
6538         if (status)
6539                 goto out;
6540         status = decode_sequence(xdr, &res->seq_res, rqstp);
6541         if (status)
6542                 goto out;
6543         status = decode_putfh(xdr);
6544         if (status)
6545                 goto out;
6546         status = decode_commit(xdr, res);
6547 out:
6548         return status;
6549 }
6550
6551 /*
6552  * Decode FSINFO response
6553  */
6554 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6555                                struct nfs4_fsinfo_res *res)
6556 {
6557         struct compound_hdr hdr;
6558         int status;
6559
6560         status = decode_compound_hdr(xdr, &hdr);
6561         if (!status)
6562                 status = decode_sequence(xdr, &res->seq_res, req);
6563         if (!status)
6564                 status = decode_putfh(xdr);
6565         if (!status)
6566                 status = decode_fsinfo(xdr, res->fsinfo);
6567         return status;
6568 }
6569
6570 /*
6571  * Decode PATHCONF response
6572  */
6573 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6574                                  struct nfs4_pathconf_res *res)
6575 {
6576         struct compound_hdr hdr;
6577         int status;
6578
6579         status = decode_compound_hdr(xdr, &hdr);
6580         if (!status)
6581                 status = decode_sequence(xdr, &res->seq_res, req);
6582         if (!status)
6583                 status = decode_putfh(xdr);
6584         if (!status)
6585                 status = decode_pathconf(xdr, res->pathconf);
6586         return status;
6587 }
6588
6589 /*
6590  * Decode STATFS response
6591  */
6592 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6593                                struct nfs4_statfs_res *res)
6594 {
6595         struct compound_hdr hdr;
6596         int status;
6597
6598         status = decode_compound_hdr(xdr, &hdr);
6599         if (!status)
6600                 status = decode_sequence(xdr, &res->seq_res, req);
6601         if (!status)
6602                 status = decode_putfh(xdr);
6603         if (!status)
6604                 status = decode_statfs(xdr, res->fsstat);
6605         return status;
6606 }
6607
6608 /*
6609  * Decode GETATTR_BITMAP response
6610  */
6611 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6612                                     struct xdr_stream *xdr,
6613                                     struct nfs4_server_caps_res *res)
6614 {
6615         struct compound_hdr hdr;
6616         int status;
6617
6618         status = decode_compound_hdr(xdr, &hdr);
6619         if (status)
6620                 goto out;
6621         status = decode_sequence(xdr, &res->seq_res, req);
6622         if (status)
6623                 goto out;
6624         status = decode_putfh(xdr);
6625         if (status)
6626                 goto out;
6627         status = decode_server_caps(xdr, res);
6628 out:
6629         return status;
6630 }
6631
6632 /*
6633  * Decode RENEW response
6634  */
6635 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6636                               void *__unused)
6637 {
6638         struct compound_hdr hdr;
6639         int status;
6640
6641         status = decode_compound_hdr(xdr, &hdr);
6642         if (!status)
6643                 status = decode_renew(xdr);
6644         return status;
6645 }
6646
6647 /*
6648  * Decode SETCLIENTID response
6649  */
6650 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6651                                     struct xdr_stream *xdr,
6652                                     struct nfs4_setclientid_res *res)
6653 {
6654         struct compound_hdr hdr;
6655         int status;
6656
6657         status = decode_compound_hdr(xdr, &hdr);
6658         if (!status)
6659                 status = decode_setclientid(xdr, res);
6660         return status;
6661 }
6662
6663 /*
6664  * Decode SETCLIENTID_CONFIRM response
6665  */
6666 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6667                                             struct xdr_stream *xdr,
6668                                             struct nfs_fsinfo *fsinfo)
6669 {
6670         struct compound_hdr hdr;
6671         int status;
6672
6673         status = decode_compound_hdr(xdr, &hdr);
6674         if (!status)
6675                 status = decode_setclientid_confirm(xdr);
6676         if (!status)
6677                 status = decode_putrootfh(xdr);
6678         if (!status)
6679                 status = decode_fsinfo(xdr, fsinfo);
6680         return status;
6681 }
6682
6683 /*
6684  * Decode DELEGRETURN response
6685  */
6686 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6687                                     struct xdr_stream *xdr,
6688                                     struct nfs4_delegreturnres *res)
6689 {
6690         struct compound_hdr hdr;
6691         int status;
6692
6693         status = decode_compound_hdr(xdr, &hdr);
6694         if (status)
6695                 goto out;
6696         status = decode_sequence(xdr, &res->seq_res, rqstp);
6697         if (status)
6698                 goto out;
6699         status = decode_putfh(xdr);
6700         if (status != 0)
6701                 goto out;
6702         status = decode_getfattr(xdr, res->fattr, res->server);
6703         if (status != 0)
6704                 goto out;
6705         status = decode_delegreturn(xdr);
6706 out:
6707         return status;
6708 }
6709
6710 /*
6711  * Decode FS_LOCATIONS response
6712  */
6713 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6714                                      struct xdr_stream *xdr,
6715                                      struct nfs4_fs_locations_res *res)
6716 {
6717         struct compound_hdr hdr;
6718         int status;
6719
6720         status = decode_compound_hdr(xdr, &hdr);
6721         if (status)
6722                 goto out;
6723         status = decode_sequence(xdr, &res->seq_res, req);
6724         if (status)
6725                 goto out;
6726         status = decode_putfh(xdr);
6727         if (status)
6728                 goto out;
6729         status = decode_lookup(xdr);
6730         if (status)
6731                 goto out;
6732         xdr_enter_page(xdr, PAGE_SIZE);
6733         status = decode_getfattr_generic(xdr, &res->fs_locations->fattr,
6734                                          NULL, res->fs_locations,
6735                                          res->fs_locations->server);
6736 out:
6737         return status;
6738 }
6739
6740 /*
6741  * Decode SECINFO response
6742  */
6743 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6744                                 struct xdr_stream *xdr,
6745                                 struct nfs4_secinfo_res *res)
6746 {
6747         struct compound_hdr hdr;
6748         int status;
6749
6750         status = decode_compound_hdr(xdr, &hdr);
6751         if (status)
6752                 goto out;
6753         status = decode_sequence(xdr, &res->seq_res, rqstp);
6754         if (status)
6755                 goto out;
6756         status = decode_putfh(xdr);
6757         if (status)
6758                 goto out;
6759         status = decode_secinfo(xdr, res);
6760 out:
6761         return status;
6762 }
6763
6764 #if defined(CONFIG_NFS_V4_1)
6765 /*
6766  * Decode BIND_CONN_TO_SESSION response
6767  */
6768 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
6769                                         struct xdr_stream *xdr,
6770                                         void *res)
6771 {
6772         struct compound_hdr hdr;
6773         int status;
6774
6775         status = decode_compound_hdr(xdr, &hdr);
6776         if (!status)
6777                 status = decode_bind_conn_to_session(xdr, res);
6778         return status;
6779 }
6780
6781 /*
6782  * Decode EXCHANGE_ID response
6783  */
6784 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
6785                                     struct xdr_stream *xdr,
6786                                     void *res)
6787 {
6788         struct compound_hdr hdr;
6789         int status;
6790
6791         status = decode_compound_hdr(xdr, &hdr);
6792         if (!status)
6793                 status = decode_exchange_id(xdr, res);
6794         return status;
6795 }
6796
6797 /*
6798  * Decode CREATE_SESSION response
6799  */
6800 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
6801                                        struct xdr_stream *xdr,
6802                                        struct nfs41_create_session_res *res)
6803 {
6804         struct compound_hdr hdr;
6805         int status;
6806
6807         status = decode_compound_hdr(xdr, &hdr);
6808         if (!status)
6809                 status = decode_create_session(xdr, res);
6810         return status;
6811 }
6812
6813 /*
6814  * Decode DESTROY_SESSION response
6815  */
6816 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
6817                                         struct xdr_stream *xdr,
6818                                         void *res)
6819 {
6820         struct compound_hdr hdr;
6821         int status;
6822
6823         status = decode_compound_hdr(xdr, &hdr);
6824         if (!status)
6825                 status = decode_destroy_session(xdr, res);
6826         return status;
6827 }
6828
6829 /*
6830  * Decode DESTROY_CLIENTID response
6831  */
6832 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
6833                                         struct xdr_stream *xdr,
6834                                         void *res)
6835 {
6836         struct compound_hdr hdr;
6837         int status;
6838
6839         status = decode_compound_hdr(xdr, &hdr);
6840         if (!status)
6841                 status = decode_destroy_clientid(xdr, res);
6842         return status;
6843 }
6844
6845 /*
6846  * Decode SEQUENCE response
6847  */
6848 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
6849                                  struct xdr_stream *xdr,
6850                                  struct nfs4_sequence_res *res)
6851 {
6852         struct compound_hdr hdr;
6853         int status;
6854
6855         status = decode_compound_hdr(xdr, &hdr);
6856         if (!status)
6857                 status = decode_sequence(xdr, res, rqstp);
6858         return status;
6859 }
6860
6861 /*
6862  * Decode GET_LEASE_TIME response
6863  */
6864 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
6865                                        struct xdr_stream *xdr,
6866                                        struct nfs4_get_lease_time_res *res)
6867 {
6868         struct compound_hdr hdr;
6869         int status;
6870
6871         status = decode_compound_hdr(xdr, &hdr);
6872         if (!status)
6873                 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
6874         if (!status)
6875                 status = decode_putrootfh(xdr);
6876         if (!status)
6877                 status = decode_fsinfo(xdr, res->lr_fsinfo);
6878         return status;
6879 }
6880
6881 /*
6882  * Decode RECLAIM_COMPLETE response
6883  */
6884 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
6885                                          struct xdr_stream *xdr,
6886                                          struct nfs41_reclaim_complete_res *res)
6887 {
6888         struct compound_hdr hdr;
6889         int status;
6890
6891         status = decode_compound_hdr(xdr, &hdr);
6892         if (!status)
6893                 status = decode_sequence(xdr, &res->seq_res, rqstp);
6894         if (!status)
6895                 status = decode_reclaim_complete(xdr, (void *)NULL);
6896         return status;
6897 }
6898
6899 /*
6900  * Decode GETDEVICELIST response
6901  */
6902 static int nfs4_xdr_dec_getdevicelist(struct rpc_rqst *rqstp,
6903                                       struct xdr_stream *xdr,
6904                                       struct nfs4_getdevicelist_res *res)
6905 {
6906         struct compound_hdr hdr;
6907         int status;
6908
6909         dprintk("encoding getdevicelist!\n");
6910
6911         status = decode_compound_hdr(xdr, &hdr);
6912         if (status != 0)
6913                 goto out;
6914         status = decode_sequence(xdr, &res->seq_res, rqstp);
6915         if (status != 0)
6916                 goto out;
6917         status = decode_putfh(xdr);
6918         if (status != 0)
6919                 goto out;
6920         status = decode_getdevicelist(xdr, res->devlist);
6921 out:
6922         return status;
6923 }
6924
6925 /*
6926  * Decode GETDEVINFO response
6927  */
6928 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
6929                                       struct xdr_stream *xdr,
6930                                       struct nfs4_getdeviceinfo_res *res)
6931 {
6932         struct compound_hdr hdr;
6933         int status;
6934
6935         status = decode_compound_hdr(xdr, &hdr);
6936         if (status != 0)
6937                 goto out;
6938         status = decode_sequence(xdr, &res->seq_res, rqstp);
6939         if (status != 0)
6940                 goto out;
6941         status = decode_getdeviceinfo(xdr, res->pdev);
6942 out:
6943         return status;
6944 }
6945
6946 /*
6947  * Decode LAYOUTGET response
6948  */
6949 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
6950                                   struct xdr_stream *xdr,
6951                                   struct nfs4_layoutget_res *res)
6952 {
6953         struct compound_hdr hdr;
6954         int status;
6955
6956         status = decode_compound_hdr(xdr, &hdr);
6957         if (status)
6958                 goto out;
6959         status = decode_sequence(xdr, &res->seq_res, rqstp);
6960         if (status)
6961                 goto out;
6962         status = decode_putfh(xdr);
6963         if (status)
6964                 goto out;
6965         status = decode_layoutget(xdr, rqstp, res);
6966 out:
6967         return status;
6968 }
6969
6970 /*
6971  * Decode LAYOUTRETURN response
6972  */
6973 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
6974                                      struct xdr_stream *xdr,
6975                                      struct nfs4_layoutreturn_res *res)
6976 {
6977         struct compound_hdr hdr;
6978         int status;
6979
6980         status = decode_compound_hdr(xdr, &hdr);
6981         if (status)
6982                 goto out;
6983         status = decode_sequence(xdr, &res->seq_res, rqstp);
6984         if (status)
6985                 goto out;
6986         status = decode_putfh(xdr);
6987         if (status)
6988                 goto out;
6989         status = decode_layoutreturn(xdr, res);
6990 out:
6991         return status;
6992 }
6993
6994 /*
6995  * Decode LAYOUTCOMMIT response
6996  */
6997 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
6998                                      struct xdr_stream *xdr,
6999                                      struct nfs4_layoutcommit_res *res)
7000 {
7001         struct compound_hdr hdr;
7002         int status;
7003
7004         status = decode_compound_hdr(xdr, &hdr);
7005         if (status)
7006                 goto out;
7007         status = decode_sequence(xdr, &res->seq_res, rqstp);
7008         if (status)
7009                 goto out;
7010         status = decode_putfh(xdr);
7011         if (status)
7012                 goto out;
7013         status = decode_layoutcommit(xdr, rqstp, res);
7014         if (status)
7015                 goto out;
7016         decode_getfattr(xdr, res->fattr, res->server);
7017 out:
7018         return status;
7019 }
7020
7021 /*
7022  * Decode SECINFO_NO_NAME response
7023  */
7024 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7025                                         struct xdr_stream *xdr,
7026                                         struct nfs4_secinfo_res *res)
7027 {
7028         struct compound_hdr hdr;
7029         int status;
7030
7031         status = decode_compound_hdr(xdr, &hdr);
7032         if (status)
7033                 goto out;
7034         status = decode_sequence(xdr, &res->seq_res, rqstp);
7035         if (status)
7036                 goto out;
7037         status = decode_putrootfh(xdr);
7038         if (status)
7039                 goto out;
7040         status = decode_secinfo_no_name(xdr, res);
7041 out:
7042         return status;
7043 }
7044
7045 /*
7046  * Decode TEST_STATEID response
7047  */
7048 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7049                                      struct xdr_stream *xdr,
7050                                      struct nfs41_test_stateid_res *res)
7051 {
7052         struct compound_hdr hdr;
7053         int status;
7054
7055         status = decode_compound_hdr(xdr, &hdr);
7056         if (status)
7057                 goto out;
7058         status = decode_sequence(xdr, &res->seq_res, rqstp);
7059         if (status)
7060                 goto out;
7061         status = decode_test_stateid(xdr, res);
7062 out:
7063         return status;
7064 }
7065
7066 /*
7067  * Decode FREE_STATEID response
7068  */
7069 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7070                                      struct xdr_stream *xdr,
7071                                      struct nfs41_free_stateid_res *res)
7072 {
7073         struct compound_hdr hdr;
7074         int status;
7075
7076         status = decode_compound_hdr(xdr, &hdr);
7077         if (status)
7078                 goto out;
7079         status = decode_sequence(xdr, &res->seq_res, rqstp);
7080         if (status)
7081                 goto out;
7082         status = decode_free_stateid(xdr, res);
7083 out:
7084         return status;
7085 }
7086 #endif /* CONFIG_NFS_V4_1 */
7087
7088 /**
7089  * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7090  *                      the local page cache.
7091  * @xdr: XDR stream where entry resides
7092  * @entry: buffer to fill in with entry data
7093  * @plus: boolean indicating whether this should be a readdirplus entry
7094  *
7095  * Returns zero if successful, otherwise a negative errno value is
7096  * returned.
7097  *
7098  * This function is not invoked during READDIR reply decoding, but
7099  * rather whenever an application invokes the getdents(2) system call
7100  * on a directory already in our cache.
7101  */
7102 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7103                        int plus)
7104 {
7105         uint32_t bitmap[3] = {0};
7106         uint32_t len;
7107         __be32 *p = xdr_inline_decode(xdr, 4);
7108         if (unlikely(!p))
7109                 goto out_overflow;
7110         if (*p == xdr_zero) {
7111                 p = xdr_inline_decode(xdr, 4);
7112                 if (unlikely(!p))
7113                         goto out_overflow;
7114                 if (*p == xdr_zero)
7115                         return -EAGAIN;
7116                 entry->eof = 1;
7117                 return -EBADCOOKIE;
7118         }
7119
7120         p = xdr_inline_decode(xdr, 12);
7121         if (unlikely(!p))
7122                 goto out_overflow;
7123         entry->prev_cookie = entry->cookie;
7124         p = xdr_decode_hyper(p, &entry->cookie);
7125         entry->len = be32_to_cpup(p);
7126
7127         p = xdr_inline_decode(xdr, entry->len);
7128         if (unlikely(!p))
7129                 goto out_overflow;
7130         entry->name = (const char *) p;
7131
7132         /*
7133          * In case the server doesn't return an inode number,
7134          * we fake one here.  (We don't use inode number 0,
7135          * since glibc seems to choke on it...)
7136          */
7137         entry->ino = 1;
7138         entry->fattr->valid = 0;
7139
7140         if (decode_attr_bitmap(xdr, bitmap) < 0)
7141                 goto out_overflow;
7142
7143         if (decode_attr_length(xdr, &len, &p) < 0)
7144                 goto out_overflow;
7145
7146         if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7147                                   NULL, entry->server) < 0)
7148                 goto out_overflow;
7149         if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7150                 entry->ino = entry->fattr->mounted_on_fileid;
7151         else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7152                 entry->ino = entry->fattr->fileid;
7153
7154         entry->d_type = DT_UNKNOWN;
7155         if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7156                 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7157
7158         return 0;
7159
7160 out_overflow:
7161         print_overflow_msg(__func__, xdr);
7162         return -EAGAIN;
7163 }
7164
7165 /*
7166  * We need to translate between nfs status return values and
7167  * the local errno values which may not be the same.
7168  */
7169 static struct {
7170         int stat;
7171         int errno;
7172 } nfs_errtbl[] = {
7173         { NFS4_OK,              0               },
7174         { NFS4ERR_PERM,         -EPERM          },
7175         { NFS4ERR_NOENT,        -ENOENT         },
7176         { NFS4ERR_IO,           -errno_NFSERR_IO},
7177         { NFS4ERR_NXIO,         -ENXIO          },
7178         { NFS4ERR_ACCESS,       -EACCES         },
7179         { NFS4ERR_EXIST,        -EEXIST         },
7180         { NFS4ERR_XDEV,         -EXDEV          },
7181         { NFS4ERR_NOTDIR,       -ENOTDIR        },
7182         { NFS4ERR_ISDIR,        -EISDIR         },
7183         { NFS4ERR_INVAL,        -EINVAL         },
7184         { NFS4ERR_FBIG,         -EFBIG          },
7185         { NFS4ERR_NOSPC,        -ENOSPC         },
7186         { NFS4ERR_ROFS,         -EROFS          },
7187         { NFS4ERR_MLINK,        -EMLINK         },
7188         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
7189         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
7190         { NFS4ERR_DQUOT,        -EDQUOT         },
7191         { NFS4ERR_STALE,        -ESTALE         },
7192         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
7193         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
7194         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
7195         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
7196         { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
7197         { NFS4ERR_BADTYPE,      -EBADTYPE       },
7198         { NFS4ERR_LOCKED,       -EAGAIN         },
7199         { NFS4ERR_SYMLINK,      -ELOOP          },
7200         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
7201         { NFS4ERR_DEADLOCK,     -EDEADLK        },
7202         { -1,                   -EIO            }
7203 };
7204
7205 /*
7206  * Convert an NFS error code to a local one.
7207  * This one is used jointly by NFSv2 and NFSv3.
7208  */
7209 static int
7210 nfs4_stat_to_errno(int stat)
7211 {
7212         int i;
7213         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7214                 if (nfs_errtbl[i].stat == stat)
7215                         return nfs_errtbl[i].errno;
7216         }
7217         if (stat <= 10000 || stat > 10100) {
7218                 /* The server is looney tunes. */
7219                 return -EREMOTEIO;
7220         }
7221         /* If we cannot translate the error, the recovery routines should
7222          * handle it.
7223          * Note: remaining NFSv4 error codes have values > 10000, so should
7224          * not conflict with native Linux error codes.
7225          */
7226         return -stat;
7227 }
7228
7229 #define PROC(proc, argtype, restype)                            \
7230 [NFSPROC4_CLNT_##proc] = {                                      \
7231         .p_proc   = NFSPROC4_COMPOUND,                          \
7232         .p_encode = (kxdreproc_t)nfs4_xdr_##argtype,            \
7233         .p_decode = (kxdrdproc_t)nfs4_xdr_##restype,            \
7234         .p_arglen = NFS4_##argtype##_sz,                        \
7235         .p_replen = NFS4_##restype##_sz,                        \
7236         .p_statidx = NFSPROC4_CLNT_##proc,                      \
7237         .p_name   = #proc,                                      \
7238 }
7239
7240 struct rpc_procinfo     nfs4_procedures[] = {
7241         PROC(READ,              enc_read,               dec_read),
7242         PROC(WRITE,             enc_write,              dec_write),
7243         PROC(COMMIT,            enc_commit,             dec_commit),
7244         PROC(OPEN,              enc_open,               dec_open),
7245         PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
7246         PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
7247         PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
7248         PROC(CLOSE,             enc_close,              dec_close),
7249         PROC(SETATTR,           enc_setattr,            dec_setattr),
7250         PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
7251         PROC(RENEW,             enc_renew,              dec_renew),
7252         PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
7253         PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7254         PROC(LOCK,              enc_lock,               dec_lock),
7255         PROC(LOCKT,             enc_lockt,              dec_lockt),
7256         PROC(LOCKU,             enc_locku,              dec_locku),
7257         PROC(ACCESS,            enc_access,             dec_access),
7258         PROC(GETATTR,           enc_getattr,            dec_getattr),
7259         PROC(LOOKUP,            enc_lookup,             dec_lookup),
7260         PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
7261         PROC(REMOVE,            enc_remove,             dec_remove),
7262         PROC(RENAME,            enc_rename,             dec_rename),
7263         PROC(LINK,              enc_link,               dec_link),
7264         PROC(SYMLINK,           enc_symlink,            dec_symlink),
7265         PROC(CREATE,            enc_create,             dec_create),
7266         PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
7267         PROC(STATFS,            enc_statfs,             dec_statfs),
7268         PROC(READLINK,          enc_readlink,           dec_readlink),
7269         PROC(READDIR,           enc_readdir,            dec_readdir),
7270         PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
7271         PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
7272         PROC(GETACL,            enc_getacl,             dec_getacl),
7273         PROC(SETACL,            enc_setacl,             dec_setacl),
7274         PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
7275         PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
7276         PROC(SECINFO,           enc_secinfo,            dec_secinfo),
7277 #if defined(CONFIG_NFS_V4_1)
7278         PROC(EXCHANGE_ID,       enc_exchange_id,        dec_exchange_id),
7279         PROC(CREATE_SESSION,    enc_create_session,     dec_create_session),
7280         PROC(DESTROY_SESSION,   enc_destroy_session,    dec_destroy_session),
7281         PROC(SEQUENCE,          enc_sequence,           dec_sequence),
7282         PROC(GET_LEASE_TIME,    enc_get_lease_time,     dec_get_lease_time),
7283         PROC(RECLAIM_COMPLETE,  enc_reclaim_complete,   dec_reclaim_complete),
7284         PROC(GETDEVICEINFO,     enc_getdeviceinfo,      dec_getdeviceinfo),
7285         PROC(LAYOUTGET,         enc_layoutget,          dec_layoutget),
7286         PROC(LAYOUTCOMMIT,      enc_layoutcommit,       dec_layoutcommit),
7287         PROC(LAYOUTRETURN,      enc_layoutreturn,       dec_layoutreturn),
7288         PROC(SECINFO_NO_NAME,   enc_secinfo_no_name,    dec_secinfo_no_name),
7289         PROC(TEST_STATEID,      enc_test_stateid,       dec_test_stateid),
7290         PROC(FREE_STATEID,      enc_free_stateid,       dec_free_stateid),
7291         PROC(GETDEVICELIST,     enc_getdevicelist,      dec_getdevicelist),
7292         PROC(BIND_CONN_TO_SESSION,
7293                         enc_bind_conn_to_session, dec_bind_conn_to_session),
7294         PROC(DESTROY_CLIENTID,  enc_destroy_clientid,   dec_destroy_clientid),
7295 #endif /* CONFIG_NFS_V4_1 */
7296 };
7297
7298 const struct rpc_version nfs_version4 = {
7299         .number                 = 4,
7300         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
7301         .procs                  = nfs4_procedures
7302 };
7303
7304 /*
7305  * Local variables:
7306  *  c-basic-offset: 8
7307  * End:
7308  */