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                                  struct compound_hdr *hdr)
1202 {
1203         encode_getattr_three(xdr,
1204                              bitmask[0] & nfs4_fattr_bitmap[0],
1205                              bitmask[1] & nfs4_fattr_bitmap[1],
1206                              bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD,
1207                              hdr);
1208 }
1209
1210 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1211 {
1212         encode_getattr_three(xdr,
1213                              bitmask[0] & nfs4_fsinfo_bitmap[0],
1214                              bitmask[1] & nfs4_fsinfo_bitmap[1],
1215                              bitmask[2] & nfs4_fsinfo_bitmap[2],
1216                              hdr);
1217 }
1218
1219 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1220 {
1221         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1222                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1223 }
1224
1225 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1226 {
1227         encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1228 }
1229
1230 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1231 {
1232         encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1233         encode_string(xdr, name->len, name->name);
1234 }
1235
1236 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1237 {
1238         if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
1239                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1240         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1241 }
1242
1243 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1244 {
1245         if (fl->fl_end == OFFSET_MAX)
1246                 return ~(uint64_t)0;
1247         return fl->fl_end - fl->fl_start + 1;
1248 }
1249
1250 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1251 {
1252         __be32 *p;
1253
1254         p = reserve_space(xdr, 32);
1255         p = xdr_encode_hyper(p, lowner->clientid);
1256         *p++ = cpu_to_be32(20);
1257         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1258         *p++ = cpu_to_be32(lowner->s_dev);
1259         xdr_encode_hyper(p, lowner->id);
1260 }
1261
1262 /*
1263  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1264  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1265  */
1266 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1267 {
1268         __be32 *p;
1269
1270         encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1271         p = reserve_space(xdr, 28);
1272         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1273         *p++ = cpu_to_be32(args->reclaim);
1274         p = xdr_encode_hyper(p, args->fl->fl_start);
1275         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1276         *p = cpu_to_be32(args->new_lock_owner);
1277         if (args->new_lock_owner){
1278                 encode_nfs4_seqid(xdr, args->open_seqid);
1279                 encode_nfs4_stateid(xdr, args->open_stateid);
1280                 encode_nfs4_seqid(xdr, args->lock_seqid);
1281                 encode_lockowner(xdr, &args->lock_owner);
1282         }
1283         else {
1284                 encode_nfs4_stateid(xdr, args->lock_stateid);
1285                 encode_nfs4_seqid(xdr, args->lock_seqid);
1286         }
1287 }
1288
1289 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1290 {
1291         __be32 *p;
1292
1293         encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1294         p = reserve_space(xdr, 20);
1295         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1296         p = xdr_encode_hyper(p, args->fl->fl_start);
1297         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1298         encode_lockowner(xdr, &args->lock_owner);
1299 }
1300
1301 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1302 {
1303         __be32 *p;
1304
1305         encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1306         encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1307         encode_nfs4_seqid(xdr, args->seqid);
1308         encode_nfs4_stateid(xdr, args->stateid);
1309         p = reserve_space(xdr, 16);
1310         p = xdr_encode_hyper(p, args->fl->fl_start);
1311         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1312 }
1313
1314 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1315 {
1316         encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1317         encode_lockowner(xdr, lowner);
1318 }
1319
1320 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1321 {
1322         encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1323         encode_string(xdr, name->len, name->name);
1324 }
1325
1326 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1327 {
1328         __be32 *p;
1329
1330         p = reserve_space(xdr, 8);
1331         switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1332         case FMODE_READ:
1333                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1334                 break;
1335         case FMODE_WRITE:
1336                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1337                 break;
1338         case FMODE_READ|FMODE_WRITE:
1339                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1340                 break;
1341         default:
1342                 *p++ = cpu_to_be32(0);
1343         }
1344         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1345 }
1346
1347 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1348 {
1349         __be32 *p;
1350  /*
1351  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1352  * owner 4 = 32
1353  */
1354         encode_nfs4_seqid(xdr, arg->seqid);
1355         encode_share_access(xdr, arg->fmode);
1356         p = reserve_space(xdr, 36);
1357         p = xdr_encode_hyper(p, arg->clientid);
1358         *p++ = cpu_to_be32(24);
1359         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1360         *p++ = cpu_to_be32(arg->server->s_dev);
1361         *p++ = cpu_to_be32(arg->id.uniquifier);
1362         xdr_encode_hyper(p, arg->id.create_time);
1363 }
1364
1365 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1366 {
1367         __be32 *p;
1368         struct nfs_client *clp;
1369
1370         p = reserve_space(xdr, 4);
1371         switch(arg->open_flags & O_EXCL) {
1372         case 0:
1373                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1374                 encode_attrs(xdr, arg->u.attrs, arg->server);
1375                 break;
1376         default:
1377                 clp = arg->server->nfs_client;
1378                 if (clp->cl_mvops->minor_version > 0) {
1379                         if (nfs4_has_persistent_session(clp)) {
1380                                 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1381                                 encode_attrs(xdr, arg->u.attrs, arg->server);
1382                         } else {
1383                                 struct iattr dummy;
1384
1385                                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1386                                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1387                                 dummy.ia_valid = 0;
1388                                 encode_attrs(xdr, &dummy, arg->server);
1389                         }
1390                 } else {
1391                         *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1392                         encode_nfs4_verifier(xdr, &arg->u.verifier);
1393                 }
1394         }
1395 }
1396
1397 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1398 {
1399         __be32 *p;
1400
1401         p = reserve_space(xdr, 4);
1402         switch (arg->open_flags & O_CREAT) {
1403         case 0:
1404                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1405                 break;
1406         default:
1407                 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1408                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1409                 encode_createmode(xdr, arg);
1410         }
1411 }
1412
1413 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1414 {
1415         __be32 *p;
1416
1417         p = reserve_space(xdr, 4);
1418         switch (delegation_type) {
1419         case 0:
1420                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1421                 break;
1422         case FMODE_READ:
1423                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1424                 break;
1425         case FMODE_WRITE|FMODE_READ:
1426                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1427                 break;
1428         default:
1429                 BUG();
1430         }
1431 }
1432
1433 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1434 {
1435         __be32 *p;
1436
1437         p = reserve_space(xdr, 4);
1438         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1439         encode_string(xdr, name->len, name->name);
1440 }
1441
1442 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1443 {
1444         __be32 *p;
1445
1446         p = reserve_space(xdr, 4);
1447         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1448         encode_delegation_type(xdr, type);
1449 }
1450
1451 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1452 {
1453         __be32 *p;
1454
1455         p = reserve_space(xdr, 4);
1456         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1457         encode_nfs4_stateid(xdr, stateid);
1458         encode_string(xdr, name->len, name->name);
1459 }
1460
1461 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1462 {
1463         encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1464         encode_openhdr(xdr, arg);
1465         encode_opentype(xdr, arg);
1466         switch (arg->claim) {
1467         case NFS4_OPEN_CLAIM_NULL:
1468                 encode_claim_null(xdr, arg->name);
1469                 break;
1470         case NFS4_OPEN_CLAIM_PREVIOUS:
1471                 encode_claim_previous(xdr, arg->u.delegation_type);
1472                 break;
1473         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1474                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1475                 break;
1476         default:
1477                 BUG();
1478         }
1479 }
1480
1481 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1482 {
1483         encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1484         encode_nfs4_stateid(xdr, arg->stateid);
1485         encode_nfs4_seqid(xdr, arg->seqid);
1486 }
1487
1488 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1489 {
1490         encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1491         encode_nfs4_stateid(xdr, arg->stateid);
1492         encode_nfs4_seqid(xdr, arg->seqid);
1493         encode_share_access(xdr, arg->fmode);
1494 }
1495
1496 static void
1497 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1498 {
1499         encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1500         encode_string(xdr, fh->size, fh->data);
1501 }
1502
1503 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1504 {
1505         encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1506 }
1507
1508 static void encode_open_stateid(struct xdr_stream *xdr,
1509                 const struct nfs_open_context *ctx,
1510                 const struct nfs_lock_context *l_ctx,
1511                 fmode_t fmode,
1512                 int zero_seqid)
1513 {
1514         nfs4_stateid stateid;
1515
1516         if (ctx->state != NULL) {
1517                 nfs4_select_rw_stateid(&stateid, ctx->state,
1518                                 fmode, l_ctx->lockowner, l_ctx->pid);
1519                 if (zero_seqid)
1520                         stateid.seqid = 0;
1521                 encode_nfs4_stateid(xdr, &stateid);
1522         } else
1523                 encode_nfs4_stateid(xdr, &zero_stateid);
1524 }
1525
1526 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1527 {
1528         __be32 *p;
1529
1530         encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1531         encode_open_stateid(xdr, args->context, args->lock_context,
1532                         FMODE_READ, hdr->minorversion);
1533
1534         p = reserve_space(xdr, 12);
1535         p = xdr_encode_hyper(p, args->offset);
1536         *p = cpu_to_be32(args->count);
1537 }
1538
1539 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1540 {
1541         uint32_t attrs[2] = {
1542                 FATTR4_WORD0_RDATTR_ERROR,
1543                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1544         };
1545         uint32_t dircount = readdir->count >> 1;
1546         __be32 *p, verf[2];
1547
1548         if (readdir->plus) {
1549                 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1550                         FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1551                 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1552                         FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1553                         FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1554                         FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1555                 dircount >>= 1;
1556         }
1557         /* Use mounted_on_fileid only if the server supports it */
1558         if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1559                 attrs[0] |= FATTR4_WORD0_FILEID;
1560
1561         encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1562         encode_uint64(xdr, readdir->cookie);
1563         encode_nfs4_verifier(xdr, &readdir->verifier);
1564         p = reserve_space(xdr, 20);
1565         *p++ = cpu_to_be32(dircount);
1566         *p++ = cpu_to_be32(readdir->count);
1567         *p++ = cpu_to_be32(2);
1568
1569         *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1570         *p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1571         memcpy(verf, readdir->verifier.data, sizeof(verf));
1572         dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1573                         __func__,
1574                         (unsigned long long)readdir->cookie,
1575                         verf[0], verf[1],
1576                         attrs[0] & readdir->bitmask[0],
1577                         attrs[1] & readdir->bitmask[1]);
1578 }
1579
1580 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1581 {
1582         encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1583 }
1584
1585 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1586 {
1587         encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1588         encode_string(xdr, name->len, name->name);
1589 }
1590
1591 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1592 {
1593         encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1594         encode_string(xdr, oldname->len, oldname->name);
1595         encode_string(xdr, newname->len, newname->name);
1596 }
1597
1598 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1599                          struct compound_hdr *hdr)
1600 {
1601         encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1602         encode_uint64(xdr, clid);
1603 }
1604
1605 static void
1606 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1607 {
1608         encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1609 }
1610
1611 static void
1612 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1613 {
1614         __be32 *p;
1615
1616         encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1617         encode_nfs4_stateid(xdr, &zero_stateid);
1618         p = reserve_space(xdr, 2*4);
1619         *p++ = cpu_to_be32(1);
1620         *p = cpu_to_be32(FATTR4_WORD0_ACL);
1621         BUG_ON(arg->acl_len % 4);
1622         p = reserve_space(xdr, 4);
1623         *p = cpu_to_be32(arg->acl_len);
1624         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1625 }
1626
1627 static void
1628 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1629 {
1630         encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1631 }
1632
1633 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1634 {
1635         encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1636         encode_nfs4_stateid(xdr, &arg->stateid);
1637         encode_attrs(xdr, arg->iap, server);
1638 }
1639
1640 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1641 {
1642         __be32 *p;
1643
1644         encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1645         encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1646
1647         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1648         p = reserve_space(xdr, 4);
1649         *p = cpu_to_be32(setclientid->sc_prog);
1650         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1651         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1652         p = reserve_space(xdr, 4);
1653         *p = cpu_to_be32(setclientid->sc_cb_ident);
1654 }
1655
1656 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1657 {
1658         encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1659                         decode_setclientid_confirm_maxsz, hdr);
1660         encode_uint64(xdr, arg->clientid);
1661         encode_nfs4_verifier(xdr, &arg->confirm);
1662 }
1663
1664 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1665 {
1666         __be32 *p;
1667
1668         encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1669         encode_open_stateid(xdr, args->context, args->lock_context,
1670                         FMODE_WRITE, hdr->minorversion);
1671
1672         p = reserve_space(xdr, 16);
1673         p = xdr_encode_hyper(p, args->offset);
1674         *p++ = cpu_to_be32(args->stable);
1675         *p = cpu_to_be32(args->count);
1676
1677         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1678 }
1679
1680 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1681 {
1682         encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1683         encode_nfs4_stateid(xdr, stateid);
1684 }
1685
1686 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1687 {
1688         encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1689         encode_string(xdr, name->len, name->name);
1690 }
1691
1692 #if defined(CONFIG_NFS_V4_1)
1693 /* NFSv4.1 operations */
1694 static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1695                                    struct nfs4_session *session,
1696                                    struct compound_hdr *hdr)
1697 {
1698         __be32 *p;
1699
1700         encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1701                 decode_bind_conn_to_session_maxsz, hdr);
1702         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1703         p = xdr_reserve_space(xdr, 8);
1704         *p++ = cpu_to_be32(NFS4_CDFC4_BACK_OR_BOTH);
1705         *p = 0; /* use_conn_in_rdma_mode = False */
1706 }
1707
1708 static void encode_exchange_id(struct xdr_stream *xdr,
1709                                struct nfs41_exchange_id_args *args,
1710                                struct compound_hdr *hdr)
1711 {
1712         __be32 *p;
1713         char impl_name[NFS4_OPAQUE_LIMIT];
1714         int len = 0;
1715
1716         encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1717         encode_nfs4_verifier(xdr, args->verifier);
1718
1719         encode_string(xdr, args->id_len, args->id);
1720
1721         p = reserve_space(xdr, 12);
1722         *p++ = cpu_to_be32(args->flags);
1723         *p++ = cpu_to_be32(0);  /* zero length state_protect4_a */
1724
1725         if (send_implementation_id &&
1726             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1727             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1728                 <= NFS4_OPAQUE_LIMIT + 1)
1729                 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1730                                utsname()->sysname, utsname()->release,
1731                                utsname()->version, utsname()->machine);
1732
1733         if (len > 0) {
1734                 *p = cpu_to_be32(1);    /* implementation id array length=1 */
1735
1736                 encode_string(xdr,
1737                         sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1738                         CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1739                 encode_string(xdr, len, impl_name);
1740                 /* just send zeros for nii_date - the date is in nii_name */
1741                 p = reserve_space(xdr, 12);
1742                 p = xdr_encode_hyper(p, 0);
1743                 *p = cpu_to_be32(0);
1744         } else
1745                 *p = cpu_to_be32(0);    /* implementation id array length=0 */
1746 }
1747
1748 static void encode_create_session(struct xdr_stream *xdr,
1749                                   struct nfs41_create_session_args *args,
1750                                   struct compound_hdr *hdr)
1751 {
1752         __be32 *p;
1753         char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1754         uint32_t len;
1755         struct nfs_client *clp = args->client;
1756         struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1757         u32 max_resp_sz_cached;
1758
1759         /*
1760          * Assumes OPEN is the biggest non-idempotent compound.
1761          * 2 is the verifier.
1762          */
1763         max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1764                               RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1765
1766         len = scnprintf(machine_name, sizeof(machine_name), "%s",
1767                         clp->cl_ipaddr);
1768
1769         encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1770         p = reserve_space(xdr, 16 + 2*28 + 20 + len + 12);
1771         p = xdr_encode_hyper(p, clp->cl_clientid);
1772         *p++ = cpu_to_be32(clp->cl_seqid);                      /*Sequence id */
1773         *p++ = cpu_to_be32(args->flags);                        /*flags */
1774
1775         /* Fore Channel */
1776         *p++ = cpu_to_be32(0);                          /* header padding size */
1777         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1778         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1779         *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1780         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1781         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1782         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1783
1784         /* Back Channel */
1785         *p++ = cpu_to_be32(0);                          /* header padding size */
1786         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1787         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1788         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1789         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1790         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1791         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1792
1793         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1794         *p++ = cpu_to_be32(1);
1795         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1796
1797         /* authsys_parms rfc1831 */
1798         *p++ = (__be32)nn->boot_time.tv_nsec;           /* stamp */
1799         p = xdr_encode_opaque(p, machine_name, len);
1800         *p++ = cpu_to_be32(0);                          /* UID */
1801         *p++ = cpu_to_be32(0);                          /* GID */
1802         *p = cpu_to_be32(0);                            /* No more gids */
1803 }
1804
1805 static void encode_destroy_session(struct xdr_stream *xdr,
1806                                    struct nfs4_session *session,
1807                                    struct compound_hdr *hdr)
1808 {
1809         encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1810         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1811 }
1812
1813 static void encode_destroy_clientid(struct xdr_stream *xdr,
1814                                    uint64_t clientid,
1815                                    struct compound_hdr *hdr)
1816 {
1817         encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1818         encode_uint64(xdr, clientid);
1819 }
1820
1821 static void encode_reclaim_complete(struct xdr_stream *xdr,
1822                                     struct nfs41_reclaim_complete_args *args,
1823                                     struct compound_hdr *hdr)
1824 {
1825         encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1826         encode_uint32(xdr, args->one_fs);
1827 }
1828 #endif /* CONFIG_NFS_V4_1 */
1829
1830 static void encode_sequence(struct xdr_stream *xdr,
1831                             const struct nfs4_sequence_args *args,
1832                             struct compound_hdr *hdr)
1833 {
1834 #if defined(CONFIG_NFS_V4_1)
1835         struct nfs4_session *session = args->sa_session;
1836         struct nfs4_slot_table *tp;
1837         struct nfs4_slot *slot;
1838         __be32 *p;
1839
1840         if (!session)
1841                 return;
1842
1843         tp = &session->fc_slot_table;
1844
1845         WARN_ON(args->sa_slotid == NFS4_MAX_SLOT_TABLE);
1846         slot = tp->slots + args->sa_slotid;
1847
1848         encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1849
1850         /*
1851          * Sessionid + seqid + slotid + max slotid + cache_this
1852          */
1853         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1854                 "max_slotid=%d cache_this=%d\n",
1855                 __func__,
1856                 ((u32 *)session->sess_id.data)[0],
1857                 ((u32 *)session->sess_id.data)[1],
1858                 ((u32 *)session->sess_id.data)[2],
1859                 ((u32 *)session->sess_id.data)[3],
1860                 slot->seq_nr, args->sa_slotid,
1861                 tp->highest_used_slotid, args->sa_cache_this);
1862         p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1863         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1864         *p++ = cpu_to_be32(slot->seq_nr);
1865         *p++ = cpu_to_be32(args->sa_slotid);
1866         *p++ = cpu_to_be32(tp->highest_used_slotid);
1867         *p = cpu_to_be32(args->sa_cache_this);
1868 #endif /* CONFIG_NFS_V4_1 */
1869 }
1870
1871 #ifdef CONFIG_NFS_V4_1
1872 static void
1873 encode_getdevicelist(struct xdr_stream *xdr,
1874                      const struct nfs4_getdevicelist_args *args,
1875                      struct compound_hdr *hdr)
1876 {
1877         __be32 *p;
1878         nfs4_verifier dummy = {
1879                 .data = "dummmmmy",
1880         };
1881
1882         encode_op_hdr(xdr, OP_GETDEVICELIST, decode_getdevicelist_maxsz, hdr);
1883         p = reserve_space(xdr, 16);
1884         *p++ = cpu_to_be32(args->layoutclass);
1885         *p++ = cpu_to_be32(NFS4_PNFS_GETDEVLIST_MAXNUM);
1886         xdr_encode_hyper(p, 0ULL);                          /* cookie */
1887         encode_nfs4_verifier(xdr, &dummy);
1888 }
1889
1890 static void
1891 encode_getdeviceinfo(struct xdr_stream *xdr,
1892                      const struct nfs4_getdeviceinfo_args *args,
1893                      struct compound_hdr *hdr)
1894 {
1895         __be32 *p;
1896
1897         encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1898         p = reserve_space(xdr, 12 + NFS4_DEVICEID4_SIZE);
1899         p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1900                                     NFS4_DEVICEID4_SIZE);
1901         *p++ = cpu_to_be32(args->pdev->layout_type);
1902         *p++ = cpu_to_be32(args->pdev->pglen);          /* gdia_maxcount */
1903         *p++ = cpu_to_be32(0);                          /* bitmap length 0 */
1904 }
1905
1906 static void
1907 encode_layoutget(struct xdr_stream *xdr,
1908                       const struct nfs4_layoutget_args *args,
1909                       struct compound_hdr *hdr)
1910 {
1911         __be32 *p;
1912
1913         encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1914         p = reserve_space(xdr, 36);
1915         *p++ = cpu_to_be32(0);     /* Signal layout available */
1916         *p++ = cpu_to_be32(args->type);
1917         *p++ = cpu_to_be32(args->range.iomode);
1918         p = xdr_encode_hyper(p, args->range.offset);
1919         p = xdr_encode_hyper(p, args->range.length);
1920         p = xdr_encode_hyper(p, args->minlength);
1921         encode_nfs4_stateid(xdr, &args->stateid);
1922         encode_uint32(xdr, args->maxcount);
1923
1924         dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1925                 __func__,
1926                 args->type,
1927                 args->range.iomode,
1928                 (unsigned long)args->range.offset,
1929                 (unsigned long)args->range.length,
1930                 args->maxcount);
1931 }
1932
1933 static int
1934 encode_layoutcommit(struct xdr_stream *xdr,
1935                     struct inode *inode,
1936                     const struct nfs4_layoutcommit_args *args,
1937                     struct compound_hdr *hdr)
1938 {
1939         __be32 *p;
1940
1941         dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1942                 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1943
1944         encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
1945         p = reserve_space(xdr, 20);
1946         /* Only whole file layouts */
1947         p = xdr_encode_hyper(p, 0); /* offset */
1948         p = xdr_encode_hyper(p, args->lastbytewritten + 1);     /* length */
1949         *p = cpu_to_be32(0); /* reclaim */
1950         encode_nfs4_stateid(xdr, &args->stateid);
1951         p = reserve_space(xdr, 20);
1952         *p++ = cpu_to_be32(1); /* newoffset = TRUE */
1953         p = xdr_encode_hyper(p, args->lastbytewritten);
1954         *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
1955         *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
1956
1957         if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit)
1958                 NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
1959                         NFS_I(inode)->layout, xdr, args);
1960         else
1961                 encode_uint32(xdr, 0); /* no layout-type payload */
1962
1963         return 0;
1964 }
1965
1966 static void
1967 encode_layoutreturn(struct xdr_stream *xdr,
1968                     const struct nfs4_layoutreturn_args *args,
1969                     struct compound_hdr *hdr)
1970 {
1971         __be32 *p;
1972
1973         encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
1974         p = reserve_space(xdr, 16);
1975         *p++ = cpu_to_be32(0);          /* reclaim. always 0 for now */
1976         *p++ = cpu_to_be32(args->layout_type);
1977         *p++ = cpu_to_be32(IOMODE_ANY);
1978         *p = cpu_to_be32(RETURN_FILE);
1979         p = reserve_space(xdr, 16);
1980         p = xdr_encode_hyper(p, 0);
1981         p = xdr_encode_hyper(p, NFS4_MAX_UINT64);
1982         spin_lock(&args->inode->i_lock);
1983         encode_nfs4_stateid(xdr, &args->stateid);
1984         spin_unlock(&args->inode->i_lock);
1985         if (NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn) {
1986                 NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn(
1987                         NFS_I(args->inode)->layout, xdr, args);
1988         } else
1989                 encode_uint32(xdr, 0);
1990 }
1991
1992 static int
1993 encode_secinfo_no_name(struct xdr_stream *xdr,
1994                        const struct nfs41_secinfo_no_name_args *args,
1995                        struct compound_hdr *hdr)
1996 {
1997         encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
1998         encode_uint32(xdr, args->style);
1999         return 0;
2000 }
2001
2002 static void encode_test_stateid(struct xdr_stream *xdr,
2003                                 struct nfs41_test_stateid_args *args,
2004                                 struct compound_hdr *hdr)
2005 {
2006         encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2007         encode_uint32(xdr, 1);
2008         encode_nfs4_stateid(xdr, args->stateid);
2009 }
2010
2011 static void encode_free_stateid(struct xdr_stream *xdr,
2012                                 struct nfs41_free_stateid_args *args,
2013                                 struct compound_hdr *hdr)
2014 {
2015         encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2016         encode_nfs4_stateid(xdr, args->stateid);
2017 }
2018 #endif /* CONFIG_NFS_V4_1 */
2019
2020 /*
2021  * END OF "GENERIC" ENCODE ROUTINES.
2022  */
2023
2024 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2025 {
2026 #if defined(CONFIG_NFS_V4_1)
2027         if (args->sa_session)
2028                 return args->sa_session->clp->cl_mvops->minor_version;
2029 #endif /* CONFIG_NFS_V4_1 */
2030         return 0;
2031 }
2032
2033 /*
2034  * Encode an ACCESS request
2035  */
2036 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2037                                 const struct nfs4_accessargs *args)
2038 {
2039         struct compound_hdr hdr = {
2040                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2041         };
2042
2043         encode_compound_hdr(xdr, req, &hdr);
2044         encode_sequence(xdr, &args->seq_args, &hdr);
2045         encode_putfh(xdr, args->fh, &hdr);
2046         encode_access(xdr, args->access, &hdr);
2047         encode_getfattr(xdr, args->bitmask, &hdr);
2048         encode_nops(&hdr);
2049 }
2050
2051 /*
2052  * Encode LOOKUP request
2053  */
2054 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2055                                 const struct nfs4_lookup_arg *args)
2056 {
2057         struct compound_hdr hdr = {
2058                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2059         };
2060
2061         encode_compound_hdr(xdr, req, &hdr);
2062         encode_sequence(xdr, &args->seq_args, &hdr);
2063         encode_putfh(xdr, args->dir_fh, &hdr);
2064         encode_lookup(xdr, args->name, &hdr);
2065         encode_getfh(xdr, &hdr);
2066         encode_getfattr(xdr, args->bitmask, &hdr);
2067         encode_nops(&hdr);
2068 }
2069
2070 /*
2071  * Encode LOOKUP_ROOT request
2072  */
2073 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2074                                      struct xdr_stream *xdr,
2075                                      const struct nfs4_lookup_root_arg *args)
2076 {
2077         struct compound_hdr hdr = {
2078                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2079         };
2080
2081         encode_compound_hdr(xdr, req, &hdr);
2082         encode_sequence(xdr, &args->seq_args, &hdr);
2083         encode_putrootfh(xdr, &hdr);
2084         encode_getfh(xdr, &hdr);
2085         encode_getfattr(xdr, args->bitmask, &hdr);
2086         encode_nops(&hdr);
2087 }
2088
2089 /*
2090  * Encode REMOVE request
2091  */
2092 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2093                                 const struct nfs_removeargs *args)
2094 {
2095         struct compound_hdr hdr = {
2096                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2097         };
2098
2099         encode_compound_hdr(xdr, req, &hdr);
2100         encode_sequence(xdr, &args->seq_args, &hdr);
2101         encode_putfh(xdr, args->fh, &hdr);
2102         encode_remove(xdr, &args->name, &hdr);
2103         encode_nops(&hdr);
2104 }
2105
2106 /*
2107  * Encode RENAME request
2108  */
2109 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2110                                 const struct nfs_renameargs *args)
2111 {
2112         struct compound_hdr hdr = {
2113                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2114         };
2115
2116         encode_compound_hdr(xdr, req, &hdr);
2117         encode_sequence(xdr, &args->seq_args, &hdr);
2118         encode_putfh(xdr, args->old_dir, &hdr);
2119         encode_savefh(xdr, &hdr);
2120         encode_putfh(xdr, args->new_dir, &hdr);
2121         encode_rename(xdr, args->old_name, args->new_name, &hdr);
2122         encode_nops(&hdr);
2123 }
2124
2125 /*
2126  * Encode LINK request
2127  */
2128 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2129                              const struct nfs4_link_arg *args)
2130 {
2131         struct compound_hdr hdr = {
2132                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2133         };
2134
2135         encode_compound_hdr(xdr, req, &hdr);
2136         encode_sequence(xdr, &args->seq_args, &hdr);
2137         encode_putfh(xdr, args->fh, &hdr);
2138         encode_savefh(xdr, &hdr);
2139         encode_putfh(xdr, args->dir_fh, &hdr);
2140         encode_link(xdr, args->name, &hdr);
2141         encode_restorefh(xdr, &hdr);
2142         encode_getfattr(xdr, args->bitmask, &hdr);
2143         encode_nops(&hdr);
2144 }
2145
2146 /*
2147  * Encode CREATE request
2148  */
2149 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2150                                 const struct nfs4_create_arg *args)
2151 {
2152         struct compound_hdr hdr = {
2153                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2154         };
2155
2156         encode_compound_hdr(xdr, req, &hdr);
2157         encode_sequence(xdr, &args->seq_args, &hdr);
2158         encode_putfh(xdr, args->dir_fh, &hdr);
2159         encode_create(xdr, args, &hdr);
2160         encode_getfh(xdr, &hdr);
2161         encode_getfattr(xdr, args->bitmask, &hdr);
2162         encode_nops(&hdr);
2163 }
2164
2165 /*
2166  * Encode SYMLINK request
2167  */
2168 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2169                                  const struct nfs4_create_arg *args)
2170 {
2171         nfs4_xdr_enc_create(req, xdr, args);
2172 }
2173
2174 /*
2175  * Encode GETATTR request
2176  */
2177 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2178                                  const struct nfs4_getattr_arg *args)
2179 {
2180         struct compound_hdr hdr = {
2181                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2182         };
2183
2184         encode_compound_hdr(xdr, req, &hdr);
2185         encode_sequence(xdr, &args->seq_args, &hdr);
2186         encode_putfh(xdr, args->fh, &hdr);
2187         encode_getfattr(xdr, args->bitmask, &hdr);
2188         encode_nops(&hdr);
2189 }
2190
2191 /*
2192  * Encode a CLOSE request
2193  */
2194 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2195                                struct nfs_closeargs *args)
2196 {
2197         struct compound_hdr hdr = {
2198                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2199         };
2200
2201         encode_compound_hdr(xdr, req, &hdr);
2202         encode_sequence(xdr, &args->seq_args, &hdr);
2203         encode_putfh(xdr, args->fh, &hdr);
2204         encode_close(xdr, args, &hdr);
2205         encode_getfattr(xdr, args->bitmask, &hdr);
2206         encode_nops(&hdr);
2207 }
2208
2209 /*
2210  * Encode an OPEN request
2211  */
2212 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2213                               struct nfs_openargs *args)
2214 {
2215         struct compound_hdr hdr = {
2216                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2217         };
2218
2219         encode_compound_hdr(xdr, req, &hdr);
2220         encode_sequence(xdr, &args->seq_args, &hdr);
2221         encode_putfh(xdr, args->fh, &hdr);
2222         encode_open(xdr, args, &hdr);
2223         encode_getfh(xdr, &hdr);
2224         encode_getfattr_open(xdr, args->bitmask, &hdr);
2225         encode_nops(&hdr);
2226 }
2227
2228 /*
2229  * Encode an OPEN_CONFIRM request
2230  */
2231 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2232                                       struct xdr_stream *xdr,
2233                                       struct nfs_open_confirmargs *args)
2234 {
2235         struct compound_hdr hdr = {
2236                 .nops   = 0,
2237         };
2238
2239         encode_compound_hdr(xdr, req, &hdr);
2240         encode_putfh(xdr, args->fh, &hdr);
2241         encode_open_confirm(xdr, args, &hdr);
2242         encode_nops(&hdr);
2243 }
2244
2245 /*
2246  * Encode an OPEN request with no attributes.
2247  */
2248 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2249                                      struct xdr_stream *xdr,
2250                                      struct nfs_openargs *args)
2251 {
2252         struct compound_hdr hdr = {
2253                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2254         };
2255
2256         encode_compound_hdr(xdr, req, &hdr);
2257         encode_sequence(xdr, &args->seq_args, &hdr);
2258         encode_putfh(xdr, args->fh, &hdr);
2259         encode_open(xdr, args, &hdr);
2260         encode_getfattr(xdr, args->bitmask, &hdr);
2261         encode_nops(&hdr);
2262 }
2263
2264 /*
2265  * Encode an OPEN_DOWNGRADE request
2266  */
2267 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2268                                         struct xdr_stream *xdr,
2269                                         struct nfs_closeargs *args)
2270 {
2271         struct compound_hdr hdr = {
2272                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2273         };
2274
2275         encode_compound_hdr(xdr, req, &hdr);
2276         encode_sequence(xdr, &args->seq_args, &hdr);
2277         encode_putfh(xdr, args->fh, &hdr);
2278         encode_open_downgrade(xdr, args, &hdr);
2279         encode_getfattr(xdr, args->bitmask, &hdr);
2280         encode_nops(&hdr);
2281 }
2282
2283 /*
2284  * Encode a LOCK request
2285  */
2286 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2287                               struct nfs_lock_args *args)
2288 {
2289         struct compound_hdr hdr = {
2290                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2291         };
2292
2293         encode_compound_hdr(xdr, req, &hdr);
2294         encode_sequence(xdr, &args->seq_args, &hdr);
2295         encode_putfh(xdr, args->fh, &hdr);
2296         encode_lock(xdr, args, &hdr);
2297         encode_nops(&hdr);
2298 }
2299
2300 /*
2301  * Encode a LOCKT request
2302  */
2303 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2304                                struct nfs_lockt_args *args)
2305 {
2306         struct compound_hdr hdr = {
2307                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2308         };
2309
2310         encode_compound_hdr(xdr, req, &hdr);
2311         encode_sequence(xdr, &args->seq_args, &hdr);
2312         encode_putfh(xdr, args->fh, &hdr);
2313         encode_lockt(xdr, args, &hdr);
2314         encode_nops(&hdr);
2315 }
2316
2317 /*
2318  * Encode a LOCKU request
2319  */
2320 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2321                                struct nfs_locku_args *args)
2322 {
2323         struct compound_hdr hdr = {
2324                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2325         };
2326
2327         encode_compound_hdr(xdr, req, &hdr);
2328         encode_sequence(xdr, &args->seq_args, &hdr);
2329         encode_putfh(xdr, args->fh, &hdr);
2330         encode_locku(xdr, args, &hdr);
2331         encode_nops(&hdr);
2332 }
2333
2334 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2335                                            struct xdr_stream *xdr,
2336                                         struct nfs_release_lockowner_args *args)
2337 {
2338         struct compound_hdr hdr = {
2339                 .minorversion = 0,
2340         };
2341
2342         encode_compound_hdr(xdr, req, &hdr);
2343         encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2344         encode_nops(&hdr);
2345 }
2346
2347 /*
2348  * Encode a READLINK request
2349  */
2350 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2351                                   const struct nfs4_readlink *args)
2352 {
2353         struct compound_hdr hdr = {
2354                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2355         };
2356
2357         encode_compound_hdr(xdr, req, &hdr);
2358         encode_sequence(xdr, &args->seq_args, &hdr);
2359         encode_putfh(xdr, args->fh, &hdr);
2360         encode_readlink(xdr, args, req, &hdr);
2361
2362         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2363                         args->pgbase, args->pglen);
2364         encode_nops(&hdr);
2365 }
2366
2367 /*
2368  * Encode a READDIR request
2369  */
2370 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2371                                  const struct nfs4_readdir_arg *args)
2372 {
2373         struct compound_hdr hdr = {
2374                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2375         };
2376
2377         encode_compound_hdr(xdr, req, &hdr);
2378         encode_sequence(xdr, &args->seq_args, &hdr);
2379         encode_putfh(xdr, args->fh, &hdr);
2380         encode_readdir(xdr, args, req, &hdr);
2381
2382         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2383                          args->pgbase, args->count);
2384         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2385                         __func__, hdr.replen << 2, args->pages,
2386                         args->pgbase, args->count);
2387         encode_nops(&hdr);
2388 }
2389
2390 /*
2391  * Encode a READ request
2392  */
2393 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2394                               struct nfs_readargs *args)
2395 {
2396         struct compound_hdr hdr = {
2397                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2398         };
2399
2400         encode_compound_hdr(xdr, req, &hdr);
2401         encode_sequence(xdr, &args->seq_args, &hdr);
2402         encode_putfh(xdr, args->fh, &hdr);
2403         encode_read(xdr, args, &hdr);
2404
2405         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2406                          args->pages, args->pgbase, args->count);
2407         req->rq_rcv_buf.flags |= XDRBUF_READ;
2408         encode_nops(&hdr);
2409 }
2410
2411 /*
2412  * Encode an SETATTR request
2413  */
2414 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2415                                  struct nfs_setattrargs *args)
2416 {
2417         struct compound_hdr hdr = {
2418                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2419         };
2420
2421         encode_compound_hdr(xdr, req, &hdr);
2422         encode_sequence(xdr, &args->seq_args, &hdr);
2423         encode_putfh(xdr, args->fh, &hdr);
2424         encode_setattr(xdr, args, args->server, &hdr);
2425         encode_getfattr(xdr, args->bitmask, &hdr);
2426         encode_nops(&hdr);
2427 }
2428
2429 /*
2430  * Encode a GETACL request
2431  */
2432 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2433                                 struct nfs_getaclargs *args)
2434 {
2435         struct compound_hdr hdr = {
2436                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2437         };
2438         uint32_t replen;
2439
2440         encode_compound_hdr(xdr, req, &hdr);
2441         encode_sequence(xdr, &args->seq_args, &hdr);
2442         encode_putfh(xdr, args->fh, &hdr);
2443         replen = hdr.replen + op_decode_hdr_maxsz + 1;
2444         encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2445
2446         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2447                 args->acl_pages, args->acl_pgbase, args->acl_len);
2448
2449         encode_nops(&hdr);
2450 }
2451
2452 /*
2453  * Encode a WRITE request
2454  */
2455 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2456                                struct nfs_writeargs *args)
2457 {
2458         struct compound_hdr hdr = {
2459                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2460         };
2461
2462         encode_compound_hdr(xdr, req, &hdr);
2463         encode_sequence(xdr, &args->seq_args, &hdr);
2464         encode_putfh(xdr, args->fh, &hdr);
2465         encode_write(xdr, args, &hdr);
2466         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2467         if (args->bitmask)
2468                 encode_getfattr(xdr, args->bitmask, &hdr);
2469         encode_nops(&hdr);
2470 }
2471
2472 /*
2473  *  a COMMIT request
2474  */
2475 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2476                                 struct nfs_commitargs *args)
2477 {
2478         struct compound_hdr hdr = {
2479                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2480         };
2481
2482         encode_compound_hdr(xdr, req, &hdr);
2483         encode_sequence(xdr, &args->seq_args, &hdr);
2484         encode_putfh(xdr, args->fh, &hdr);
2485         encode_commit(xdr, args, &hdr);
2486         encode_nops(&hdr);
2487 }
2488
2489 /*
2490  * FSINFO request
2491  */
2492 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2493                                 struct nfs4_fsinfo_arg *args)
2494 {
2495         struct compound_hdr hdr = {
2496                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2497         };
2498
2499         encode_compound_hdr(xdr, req, &hdr);
2500         encode_sequence(xdr, &args->seq_args, &hdr);
2501         encode_putfh(xdr, args->fh, &hdr);
2502         encode_fsinfo(xdr, args->bitmask, &hdr);
2503         encode_nops(&hdr);
2504 }
2505
2506 /*
2507  * a PATHCONF request
2508  */
2509 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2510                                   const struct nfs4_pathconf_arg *args)
2511 {
2512         struct compound_hdr hdr = {
2513                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2514         };
2515
2516         encode_compound_hdr(xdr, req, &hdr);
2517         encode_sequence(xdr, &args->seq_args, &hdr);
2518         encode_putfh(xdr, args->fh, &hdr);
2519         encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2520                            &hdr);
2521         encode_nops(&hdr);
2522 }
2523
2524 /*
2525  * a STATFS request
2526  */
2527 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2528                                 const struct nfs4_statfs_arg *args)
2529 {
2530         struct compound_hdr hdr = {
2531                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2532         };
2533
2534         encode_compound_hdr(xdr, req, &hdr);
2535         encode_sequence(xdr, &args->seq_args, &hdr);
2536         encode_putfh(xdr, args->fh, &hdr);
2537         encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2538                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2539         encode_nops(&hdr);
2540 }
2541
2542 /*
2543  * GETATTR_BITMAP request
2544  */
2545 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2546                                      struct xdr_stream *xdr,
2547                                      struct nfs4_server_caps_arg *args)
2548 {
2549         struct compound_hdr hdr = {
2550                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2551         };
2552
2553         encode_compound_hdr(xdr, req, &hdr);
2554         encode_sequence(xdr, &args->seq_args, &hdr);
2555         encode_putfh(xdr, args->fhandle, &hdr);
2556         encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2557                            FATTR4_WORD0_FH_EXPIRE_TYPE|
2558                            FATTR4_WORD0_LINK_SUPPORT|
2559                            FATTR4_WORD0_SYMLINK_SUPPORT|
2560                            FATTR4_WORD0_ACLSUPPORT, &hdr);
2561         encode_nops(&hdr);
2562 }
2563
2564 /*
2565  * a RENEW request
2566  */
2567 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2568                                struct nfs_client *clp)
2569 {
2570         struct compound_hdr hdr = {
2571                 .nops   = 0,
2572         };
2573
2574         encode_compound_hdr(xdr, req, &hdr);
2575         encode_renew(xdr, clp->cl_clientid, &hdr);
2576         encode_nops(&hdr);
2577 }
2578
2579 /*
2580  * a SETCLIENTID request
2581  */
2582 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2583                                      struct xdr_stream *xdr,
2584                                      struct nfs4_setclientid *sc)
2585 {
2586         struct compound_hdr hdr = {
2587                 .nops   = 0,
2588         };
2589
2590         encode_compound_hdr(xdr, req, &hdr);
2591         encode_setclientid(xdr, sc, &hdr);
2592         encode_nops(&hdr);
2593 }
2594
2595 /*
2596  * a SETCLIENTID_CONFIRM request
2597  */
2598 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2599                                              struct xdr_stream *xdr,
2600                                              struct nfs4_setclientid_res *arg)
2601 {
2602         struct compound_hdr hdr = {
2603                 .nops   = 0,
2604         };
2605         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2606
2607         encode_compound_hdr(xdr, req, &hdr);
2608         encode_setclientid_confirm(xdr, arg, &hdr);
2609         encode_putrootfh(xdr, &hdr);
2610         encode_fsinfo(xdr, lease_bitmap, &hdr);
2611         encode_nops(&hdr);
2612 }
2613
2614 /*
2615  * DELEGRETURN request
2616  */
2617 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2618                                      struct xdr_stream *xdr,
2619                                      const struct nfs4_delegreturnargs *args)
2620 {
2621         struct compound_hdr hdr = {
2622                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2623         };
2624
2625         encode_compound_hdr(xdr, req, &hdr);
2626         encode_sequence(xdr, &args->seq_args, &hdr);
2627         encode_putfh(xdr, args->fhandle, &hdr);
2628         encode_getfattr(xdr, args->bitmask, &hdr);
2629         encode_delegreturn(xdr, args->stateid, &hdr);
2630         encode_nops(&hdr);
2631 }
2632
2633 /*
2634  * Encode FS_LOCATIONS request
2635  */
2636 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2637                                       struct xdr_stream *xdr,
2638                                       struct nfs4_fs_locations_arg *args)
2639 {
2640         struct compound_hdr hdr = {
2641                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2642         };
2643         uint32_t replen;
2644
2645         encode_compound_hdr(xdr, req, &hdr);
2646         encode_sequence(xdr, &args->seq_args, &hdr);
2647         encode_putfh(xdr, args->dir_fh, &hdr);
2648         encode_lookup(xdr, args->name, &hdr);
2649         replen = hdr.replen;    /* get the attribute into args->page */
2650         encode_fs_locations(xdr, args->bitmask, &hdr);
2651
2652         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2653                         0, PAGE_SIZE);
2654         encode_nops(&hdr);
2655 }
2656
2657 /*
2658  * Encode SECINFO request
2659  */
2660 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2661                                 struct xdr_stream *xdr,
2662                                 struct nfs4_secinfo_arg *args)
2663 {
2664         struct compound_hdr hdr = {
2665                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2666         };
2667
2668         encode_compound_hdr(xdr, req, &hdr);
2669         encode_sequence(xdr, &args->seq_args, &hdr);
2670         encode_putfh(xdr, args->dir_fh, &hdr);
2671         encode_secinfo(xdr, args->name, &hdr);
2672         encode_nops(&hdr);
2673 }
2674
2675 #if defined(CONFIG_NFS_V4_1)
2676 /*
2677  * BIND_CONN_TO_SESSION request
2678  */
2679 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2680                                 struct xdr_stream *xdr,
2681                                 struct nfs_client *clp)
2682 {
2683         struct compound_hdr hdr = {
2684                 .minorversion = clp->cl_mvops->minor_version,
2685         };
2686
2687         encode_compound_hdr(xdr, req, &hdr);
2688         encode_bind_conn_to_session(xdr, clp->cl_session, &hdr);
2689         encode_nops(&hdr);
2690 }
2691
2692 /*
2693  * EXCHANGE_ID request
2694  */
2695 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2696                                      struct xdr_stream *xdr,
2697                                      struct nfs41_exchange_id_args *args)
2698 {
2699         struct compound_hdr hdr = {
2700                 .minorversion = args->client->cl_mvops->minor_version,
2701         };
2702
2703         encode_compound_hdr(xdr, req, &hdr);
2704         encode_exchange_id(xdr, args, &hdr);
2705         encode_nops(&hdr);
2706 }
2707
2708 /*
2709  * a CREATE_SESSION request
2710  */
2711 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2712                                         struct xdr_stream *xdr,
2713                                         struct nfs41_create_session_args *args)
2714 {
2715         struct compound_hdr hdr = {
2716                 .minorversion = args->client->cl_mvops->minor_version,
2717         };
2718
2719         encode_compound_hdr(xdr, req, &hdr);
2720         encode_create_session(xdr, args, &hdr);
2721         encode_nops(&hdr);
2722 }
2723
2724 /*
2725  * a DESTROY_SESSION request
2726  */
2727 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2728                                          struct xdr_stream *xdr,
2729                                          struct nfs4_session *session)
2730 {
2731         struct compound_hdr hdr = {
2732                 .minorversion = session->clp->cl_mvops->minor_version,
2733         };
2734
2735         encode_compound_hdr(xdr, req, &hdr);
2736         encode_destroy_session(xdr, session, &hdr);
2737         encode_nops(&hdr);
2738 }
2739
2740 /*
2741  * a DESTROY_CLIENTID request
2742  */
2743 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2744                                          struct xdr_stream *xdr,
2745                                          struct nfs_client *clp)
2746 {
2747         struct compound_hdr hdr = {
2748                 .minorversion = clp->cl_mvops->minor_version,
2749         };
2750
2751         encode_compound_hdr(xdr, req, &hdr);
2752         encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2753         encode_nops(&hdr);
2754 }
2755
2756 /*
2757  * a SEQUENCE request
2758  */
2759 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2760                                   struct nfs4_sequence_args *args)
2761 {
2762         struct compound_hdr hdr = {
2763                 .minorversion = nfs4_xdr_minorversion(args),
2764         };
2765
2766         encode_compound_hdr(xdr, req, &hdr);
2767         encode_sequence(xdr, args, &hdr);
2768         encode_nops(&hdr);
2769 }
2770
2771 /*
2772  * a GET_LEASE_TIME request
2773  */
2774 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2775                                         struct xdr_stream *xdr,
2776                                         struct nfs4_get_lease_time_args *args)
2777 {
2778         struct compound_hdr hdr = {
2779                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2780         };
2781         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2782
2783         encode_compound_hdr(xdr, req, &hdr);
2784         encode_sequence(xdr, &args->la_seq_args, &hdr);
2785         encode_putrootfh(xdr, &hdr);
2786         encode_fsinfo(xdr, lease_bitmap, &hdr);
2787         encode_nops(&hdr);
2788 }
2789
2790 /*
2791  * a RECLAIM_COMPLETE request
2792  */
2793 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2794                                           struct xdr_stream *xdr,
2795                                 struct nfs41_reclaim_complete_args *args)
2796 {
2797         struct compound_hdr hdr = {
2798                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2799         };
2800
2801         encode_compound_hdr(xdr, req, &hdr);
2802         encode_sequence(xdr, &args->seq_args, &hdr);
2803         encode_reclaim_complete(xdr, args, &hdr);
2804         encode_nops(&hdr);
2805 }
2806
2807 /*
2808  * Encode GETDEVICELIST request
2809  */
2810 static void nfs4_xdr_enc_getdevicelist(struct rpc_rqst *req,
2811                                        struct xdr_stream *xdr,
2812                                        struct nfs4_getdevicelist_args *args)
2813 {
2814         struct compound_hdr hdr = {
2815                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2816         };
2817
2818         encode_compound_hdr(xdr, req, &hdr);
2819         encode_sequence(xdr, &args->seq_args, &hdr);
2820         encode_putfh(xdr, args->fh, &hdr);
2821         encode_getdevicelist(xdr, args, &hdr);
2822         encode_nops(&hdr);
2823 }
2824
2825 /*
2826  * Encode GETDEVICEINFO request
2827  */
2828 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2829                                        struct xdr_stream *xdr,
2830                                        struct nfs4_getdeviceinfo_args *args)
2831 {
2832         struct compound_hdr hdr = {
2833                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2834         };
2835
2836         encode_compound_hdr(xdr, req, &hdr);
2837         encode_sequence(xdr, &args->seq_args, &hdr);
2838         encode_getdeviceinfo(xdr, args, &hdr);
2839
2840         /* set up reply kvec. Subtract notification bitmap max size (2)
2841          * so that notification bitmap is put in xdr_buf tail */
2842         xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2843                          args->pdev->pages, args->pdev->pgbase,
2844                          args->pdev->pglen);
2845
2846         encode_nops(&hdr);
2847 }
2848
2849 /*
2850  *  Encode LAYOUTGET request
2851  */
2852 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2853                                    struct xdr_stream *xdr,
2854                                    struct nfs4_layoutget_args *args)
2855 {
2856         struct compound_hdr hdr = {
2857                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2858         };
2859
2860         encode_compound_hdr(xdr, req, &hdr);
2861         encode_sequence(xdr, &args->seq_args, &hdr);
2862         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2863         encode_layoutget(xdr, args, &hdr);
2864
2865         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2866             args->layout.pages, 0, args->layout.pglen);
2867
2868         encode_nops(&hdr);
2869 }
2870
2871 /*
2872  *  Encode LAYOUTCOMMIT request
2873  */
2874 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2875                                       struct xdr_stream *xdr,
2876                                       struct nfs4_layoutcommit_args *args)
2877 {
2878         struct nfs4_layoutcommit_data *data =
2879                 container_of(args, struct nfs4_layoutcommit_data, args);
2880         struct compound_hdr hdr = {
2881                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2882         };
2883
2884         encode_compound_hdr(xdr, req, &hdr);
2885         encode_sequence(xdr, &args->seq_args, &hdr);
2886         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2887         encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2888         encode_getfattr(xdr, args->bitmask, &hdr);
2889         encode_nops(&hdr);
2890 }
2891
2892 /*
2893  * Encode LAYOUTRETURN request
2894  */
2895 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2896                                       struct xdr_stream *xdr,
2897                                       struct nfs4_layoutreturn_args *args)
2898 {
2899         struct compound_hdr hdr = {
2900                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2901         };
2902
2903         encode_compound_hdr(xdr, req, &hdr);
2904         encode_sequence(xdr, &args->seq_args, &hdr);
2905         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2906         encode_layoutreturn(xdr, args, &hdr);
2907         encode_nops(&hdr);
2908 }
2909
2910 /*
2911  * Encode SECINFO_NO_NAME request
2912  */
2913 static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
2914                                         struct xdr_stream *xdr,
2915                                         struct nfs41_secinfo_no_name_args *args)
2916 {
2917         struct compound_hdr hdr = {
2918                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2919         };
2920
2921         encode_compound_hdr(xdr, req, &hdr);
2922         encode_sequence(xdr, &args->seq_args, &hdr);
2923         encode_putrootfh(xdr, &hdr);
2924         encode_secinfo_no_name(xdr, args, &hdr);
2925         encode_nops(&hdr);
2926         return 0;
2927 }
2928
2929 /*
2930  *  Encode TEST_STATEID request
2931  */
2932 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
2933                                       struct xdr_stream *xdr,
2934                                       struct nfs41_test_stateid_args *args)
2935 {
2936         struct compound_hdr hdr = {
2937                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2938         };
2939
2940         encode_compound_hdr(xdr, req, &hdr);
2941         encode_sequence(xdr, &args->seq_args, &hdr);
2942         encode_test_stateid(xdr, args, &hdr);
2943         encode_nops(&hdr);
2944 }
2945
2946 /*
2947  *  Encode FREE_STATEID request
2948  */
2949 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
2950                                      struct xdr_stream *xdr,
2951                                      struct nfs41_free_stateid_args *args)
2952 {
2953         struct compound_hdr hdr = {
2954                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2955         };
2956
2957         encode_compound_hdr(xdr, req, &hdr);
2958         encode_sequence(xdr, &args->seq_args, &hdr);
2959         encode_free_stateid(xdr, args, &hdr);
2960         encode_nops(&hdr);
2961 }
2962 #endif /* CONFIG_NFS_V4_1 */
2963
2964 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
2965 {
2966         dprintk("nfs: %s: prematurely hit end of receive buffer. "
2967                 "Remaining buffer length is %tu words.\n",
2968                 func, xdr->end - xdr->p);
2969 }
2970
2971 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2972 {
2973         __be32 *p;
2974
2975         p = xdr_inline_decode(xdr, 4);
2976         if (unlikely(!p))
2977                 goto out_overflow;
2978         *len = be32_to_cpup(p);
2979         p = xdr_inline_decode(xdr, *len);
2980         if (unlikely(!p))
2981                 goto out_overflow;
2982         *string = (char *)p;
2983         return 0;
2984 out_overflow:
2985         print_overflow_msg(__func__, xdr);
2986         return -EIO;
2987 }
2988
2989 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2990 {
2991         __be32 *p;
2992
2993         p = xdr_inline_decode(xdr, 8);
2994         if (unlikely(!p))
2995                 goto out_overflow;
2996         hdr->status = be32_to_cpup(p++);
2997         hdr->taglen = be32_to_cpup(p);
2998
2999         p = xdr_inline_decode(xdr, hdr->taglen + 4);
3000         if (unlikely(!p))
3001                 goto out_overflow;
3002         hdr->tag = (char *)p;
3003         p += XDR_QUADLEN(hdr->taglen);
3004         hdr->nops = be32_to_cpup(p);
3005         if (unlikely(hdr->nops < 1))
3006                 return nfs4_stat_to_errno(hdr->status);
3007         return 0;
3008 out_overflow:
3009         print_overflow_msg(__func__, xdr);
3010         return -EIO;
3011 }
3012
3013 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3014 {
3015         __be32 *p;
3016         uint32_t opnum;
3017         int32_t nfserr;
3018
3019         p = xdr_inline_decode(xdr, 8);
3020         if (unlikely(!p))
3021                 goto out_overflow;
3022         opnum = be32_to_cpup(p++);
3023         if (opnum != expected) {
3024                 dprintk("nfs: Server returned operation"
3025                         " %d but we issued a request for %d\n",
3026                                 opnum, expected);
3027                 return -EIO;
3028         }
3029         nfserr = be32_to_cpup(p);
3030         if (nfserr != NFS_OK)
3031                 return nfs4_stat_to_errno(nfserr);
3032         return 0;
3033 out_overflow:
3034         print_overflow_msg(__func__, xdr);
3035         return -EIO;
3036 }
3037
3038 /* Dummy routine */
3039 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
3040 {
3041         __be32 *p;
3042         unsigned int strlen;
3043         char *str;
3044
3045         p = xdr_inline_decode(xdr, 12);
3046         if (likely(p))
3047                 return decode_opaque_inline(xdr, &strlen, &str);
3048         print_overflow_msg(__func__, xdr);
3049         return -EIO;
3050 }
3051
3052 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3053 {
3054         uint32_t bmlen;
3055         __be32 *p;
3056
3057         p = xdr_inline_decode(xdr, 4);
3058         if (unlikely(!p))
3059                 goto out_overflow;
3060         bmlen = be32_to_cpup(p);
3061
3062         bitmap[0] = bitmap[1] = bitmap[2] = 0;
3063         p = xdr_inline_decode(xdr, (bmlen << 2));
3064         if (unlikely(!p))
3065                 goto out_overflow;
3066         if (bmlen > 0) {
3067                 bitmap[0] = be32_to_cpup(p++);
3068                 if (bmlen > 1) {
3069                         bitmap[1] = be32_to_cpup(p++);
3070                         if (bmlen > 2)
3071                                 bitmap[2] = be32_to_cpup(p);
3072                 }
3073         }
3074         return 0;
3075 out_overflow:
3076         print_overflow_msg(__func__, xdr);
3077         return -EIO;
3078 }
3079
3080 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
3081 {
3082         __be32 *p;
3083
3084         p = xdr_inline_decode(xdr, 4);
3085         if (unlikely(!p))
3086                 goto out_overflow;
3087         *attrlen = be32_to_cpup(p);
3088         *savep = xdr->p;
3089         return 0;
3090 out_overflow:
3091         print_overflow_msg(__func__, xdr);
3092         return -EIO;
3093 }
3094
3095 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3096 {
3097         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3098                 int ret;
3099                 ret = decode_attr_bitmap(xdr, bitmask);
3100                 if (unlikely(ret < 0))
3101                         return ret;
3102                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3103         } else
3104                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3105         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3106                 bitmask[0], bitmask[1], bitmask[2]);
3107         return 0;
3108 }
3109
3110 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3111 {
3112         __be32 *p;
3113         int ret = 0;
3114
3115         *type = 0;
3116         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3117                 return -EIO;
3118         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3119                 p = xdr_inline_decode(xdr, 4);
3120                 if (unlikely(!p))
3121                         goto out_overflow;
3122                 *type = be32_to_cpup(p);
3123                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3124                         dprintk("%s: bad type %d\n", __func__, *type);
3125                         return -EIO;
3126                 }
3127                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3128                 ret = NFS_ATTR_FATTR_TYPE;
3129         }
3130         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3131         return ret;
3132 out_overflow:
3133         print_overflow_msg(__func__, xdr);
3134         return -EIO;
3135 }
3136
3137 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3138                                       uint32_t *bitmap, uint32_t *type)
3139 {
3140         __be32 *p;
3141
3142         *type = 0;
3143         if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3144                 return -EIO;
3145         if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3146                 p = xdr_inline_decode(xdr, 4);
3147                 if (unlikely(!p))
3148                         goto out_overflow;
3149                 *type = be32_to_cpup(p);
3150                 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3151         }
3152         dprintk("%s: expire type=0x%x\n", __func__, *type);
3153         return 0;
3154 out_overflow:
3155         print_overflow_msg(__func__, xdr);
3156         return -EIO;
3157 }
3158
3159 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3160 {
3161         __be32 *p;
3162         int ret = 0;
3163
3164         *change = 0;
3165         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3166                 return -EIO;
3167         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3168                 p = xdr_inline_decode(xdr, 8);
3169                 if (unlikely(!p))
3170                         goto out_overflow;
3171                 xdr_decode_hyper(p, change);
3172                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3173                 ret = NFS_ATTR_FATTR_CHANGE;
3174         }
3175         dprintk("%s: change attribute=%Lu\n", __func__,
3176                         (unsigned long long)*change);
3177         return ret;
3178 out_overflow:
3179         print_overflow_msg(__func__, xdr);
3180         return -EIO;
3181 }
3182
3183 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3184 {
3185         __be32 *p;
3186         int ret = 0;
3187
3188         *size = 0;
3189         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3190                 return -EIO;
3191         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3192                 p = xdr_inline_decode(xdr, 8);
3193                 if (unlikely(!p))
3194                         goto out_overflow;
3195                 xdr_decode_hyper(p, size);
3196                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3197                 ret = NFS_ATTR_FATTR_SIZE;
3198         }
3199         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3200         return ret;
3201 out_overflow:
3202         print_overflow_msg(__func__, xdr);
3203         return -EIO;
3204 }
3205
3206 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3207 {
3208         __be32 *p;
3209
3210         *res = 0;
3211         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3212                 return -EIO;
3213         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3214                 p = xdr_inline_decode(xdr, 4);
3215                 if (unlikely(!p))
3216                         goto out_overflow;
3217                 *res = be32_to_cpup(p);
3218                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3219         }
3220         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3221         return 0;
3222 out_overflow:
3223         print_overflow_msg(__func__, xdr);
3224         return -EIO;
3225 }
3226
3227 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3228 {
3229         __be32 *p;
3230
3231         *res = 0;
3232         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3233                 return -EIO;
3234         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3235                 p = xdr_inline_decode(xdr, 4);
3236                 if (unlikely(!p))
3237                         goto out_overflow;
3238                 *res = be32_to_cpup(p);
3239                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3240         }
3241         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3242         return 0;
3243 out_overflow:
3244         print_overflow_msg(__func__, xdr);
3245         return -EIO;
3246 }
3247
3248 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3249 {
3250         __be32 *p;
3251         int ret = 0;
3252
3253         fsid->major = 0;
3254         fsid->minor = 0;
3255         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3256                 return -EIO;
3257         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3258                 p = xdr_inline_decode(xdr, 16);
3259                 if (unlikely(!p))
3260                         goto out_overflow;
3261                 p = xdr_decode_hyper(p, &fsid->major);
3262                 xdr_decode_hyper(p, &fsid->minor);
3263                 bitmap[0] &= ~FATTR4_WORD0_FSID;
3264                 ret = NFS_ATTR_FATTR_FSID;
3265         }
3266         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3267                         (unsigned long long)fsid->major,
3268                         (unsigned long long)fsid->minor);
3269         return ret;
3270 out_overflow:
3271         print_overflow_msg(__func__, xdr);
3272         return -EIO;
3273 }
3274
3275 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3276 {
3277         __be32 *p;
3278
3279         *res = 60;
3280         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3281                 return -EIO;
3282         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3283                 p = xdr_inline_decode(xdr, 4);
3284                 if (unlikely(!p))
3285                         goto out_overflow;
3286                 *res = be32_to_cpup(p);
3287                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3288         }
3289         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3290         return 0;
3291 out_overflow:
3292         print_overflow_msg(__func__, xdr);
3293         return -EIO;
3294 }
3295
3296 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3297 {
3298         __be32 *p;
3299
3300         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3301                 return -EIO;
3302         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3303                 p = xdr_inline_decode(xdr, 4);
3304                 if (unlikely(!p))
3305                         goto out_overflow;
3306                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3307                 *res = -be32_to_cpup(p);
3308         }
3309         return 0;
3310 out_overflow:
3311         print_overflow_msg(__func__, xdr);
3312         return -EIO;
3313 }
3314
3315 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3316 {
3317         __be32 *p;
3318         int len;
3319
3320         if (fh != NULL)
3321                 memset(fh, 0, sizeof(*fh));
3322
3323         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3324                 return -EIO;
3325         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3326                 p = xdr_inline_decode(xdr, 4);
3327                 if (unlikely(!p))
3328                         goto out_overflow;
3329                 len = be32_to_cpup(p);
3330                 if (len > NFS4_FHSIZE)
3331                         return -EIO;
3332                 p = xdr_inline_decode(xdr, len);
3333                 if (unlikely(!p))
3334                         goto out_overflow;
3335                 if (fh != NULL) {
3336                         memcpy(fh->data, p, len);
3337                         fh->size = len;
3338                 }
3339                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3340         }
3341         return 0;
3342 out_overflow:
3343         print_overflow_msg(__func__, xdr);
3344         return -EIO;
3345 }
3346
3347 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3348 {
3349         __be32 *p;
3350
3351         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
3352         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3353                 return -EIO;
3354         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3355                 p = xdr_inline_decode(xdr, 4);
3356                 if (unlikely(!p))
3357                         goto out_overflow;
3358                 *res = be32_to_cpup(p);
3359                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3360         }
3361         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3362         return 0;
3363 out_overflow:
3364         print_overflow_msg(__func__, xdr);
3365         return -EIO;
3366 }
3367
3368 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3369 {
3370         __be32 *p;
3371         int ret = 0;
3372
3373         *fileid = 0;
3374         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3375                 return -EIO;
3376         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3377                 p = xdr_inline_decode(xdr, 8);
3378                 if (unlikely(!p))
3379                         goto out_overflow;
3380                 xdr_decode_hyper(p, fileid);
3381                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3382                 ret = NFS_ATTR_FATTR_FILEID;
3383         }
3384         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3385         return ret;
3386 out_overflow:
3387         print_overflow_msg(__func__, xdr);
3388         return -EIO;
3389 }
3390
3391 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3392 {
3393         __be32 *p;
3394         int ret = 0;
3395
3396         *fileid = 0;
3397         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3398                 return -EIO;
3399         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3400                 p = xdr_inline_decode(xdr, 8);
3401                 if (unlikely(!p))
3402                         goto out_overflow;
3403                 xdr_decode_hyper(p, fileid);
3404                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3405                 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3406         }
3407         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3408         return ret;
3409 out_overflow:
3410         print_overflow_msg(__func__, xdr);
3411         return -EIO;
3412 }
3413
3414 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3415 {
3416         __be32 *p;
3417         int status = 0;
3418
3419         *res = 0;
3420         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3421                 return -EIO;
3422         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3423                 p = xdr_inline_decode(xdr, 8);
3424                 if (unlikely(!p))
3425                         goto out_overflow;
3426                 xdr_decode_hyper(p, res);
3427                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3428         }
3429         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3430         return status;
3431 out_overflow:
3432         print_overflow_msg(__func__, xdr);
3433         return -EIO;
3434 }
3435
3436 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3437 {
3438         __be32 *p;
3439         int status = 0;
3440
3441         *res = 0;
3442         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3443                 return -EIO;
3444         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3445                 p = xdr_inline_decode(xdr, 8);
3446                 if (unlikely(!p))
3447                         goto out_overflow;
3448                 xdr_decode_hyper(p, res);
3449                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3450         }
3451         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3452         return status;
3453 out_overflow:
3454         print_overflow_msg(__func__, xdr);
3455         return -EIO;
3456 }
3457
3458 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3459 {
3460         __be32 *p;
3461         int status = 0;
3462
3463         *res = 0;
3464         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3465                 return -EIO;
3466         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3467                 p = xdr_inline_decode(xdr, 8);
3468                 if (unlikely(!p))
3469                         goto out_overflow;
3470                 xdr_decode_hyper(p, res);
3471                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3472         }
3473         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3474         return status;
3475 out_overflow:
3476         print_overflow_msg(__func__, xdr);
3477         return -EIO;
3478 }
3479
3480 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3481 {
3482         u32 n;
3483         __be32 *p;
3484         int status = 0;
3485
3486         p = xdr_inline_decode(xdr, 4);
3487         if (unlikely(!p))
3488                 goto out_overflow;
3489         n = be32_to_cpup(p);
3490         if (n == 0)
3491                 goto root_path;
3492         dprintk("pathname4: ");
3493         path->ncomponents = 0;
3494         while (path->ncomponents < n) {
3495                 struct nfs4_string *component = &path->components[path->ncomponents];
3496                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3497                 if (unlikely(status != 0))
3498                         goto out_eio;
3499                 ifdebug (XDR)
3500                         pr_cont("%s%.*s ",
3501                                 (path->ncomponents != n ? "/ " : ""),
3502                                 component->len, component->data);
3503                 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
3504                         path->ncomponents++;
3505                 else {
3506                         dprintk("cannot parse %d components in path\n", n);
3507                         goto out_eio;
3508                 }
3509         }
3510 out:
3511         return status;
3512 root_path:
3513 /* a root pathname is sent as a zero component4 */
3514         path->ncomponents = 1;
3515         path->components[0].len=0;
3516         path->components[0].data=NULL;
3517         dprintk("pathname4: /\n");
3518         goto out;
3519 out_eio:
3520         dprintk(" status %d", status);
3521         status = -EIO;
3522         goto out;
3523 out_overflow:
3524         print_overflow_msg(__func__, xdr);
3525         return -EIO;
3526 }
3527
3528 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3529 {
3530         int n;
3531         __be32 *p;
3532         int status = -EIO;
3533
3534         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3535                 goto out;
3536         status = 0;
3537         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3538                 goto out;
3539         status = -EIO;
3540         /* Ignore borken servers that return unrequested attrs */
3541         if (unlikely(res == NULL))
3542                 goto out;
3543         dprintk("%s: fsroot:\n", __func__);
3544         status = decode_pathname(xdr, &res->fs_path);
3545         if (unlikely(status != 0))
3546                 goto out;
3547         p = xdr_inline_decode(xdr, 4);
3548         if (unlikely(!p))
3549                 goto out_overflow;
3550         n = be32_to_cpup(p);
3551         if (n <= 0)
3552                 goto out_eio;
3553         res->nlocations = 0;
3554         while (res->nlocations < n) {
3555                 u32 m;
3556                 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
3557
3558                 p = xdr_inline_decode(xdr, 4);
3559                 if (unlikely(!p))
3560                         goto out_overflow;
3561                 m = be32_to_cpup(p);
3562
3563                 loc->nservers = 0;
3564                 dprintk("%s: servers:\n", __func__);
3565                 while (loc->nservers < m) {
3566                         struct nfs4_string *server = &loc->servers[loc->nservers];
3567                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3568                         if (unlikely(status != 0))
3569                                 goto out_eio;
3570                         dprintk("%s ", server->data);
3571                         if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
3572                                 loc->nservers++;
3573                         else {
3574                                 unsigned int i;
3575                                 dprintk("%s: using first %u of %u servers "
3576                                         "returned for location %u\n",
3577                                                 __func__,
3578                                                 NFS4_FS_LOCATION_MAXSERVERS,
3579                                                 m, res->nlocations);
3580                                 for (i = loc->nservers; i < m; i++) {
3581                                         unsigned int len;
3582                                         char *data;
3583                                         status = decode_opaque_inline(xdr, &len, &data);
3584                                         if (unlikely(status != 0))
3585                                                 goto out_eio;
3586                                 }
3587                         }
3588                 }
3589                 status = decode_pathname(xdr, &loc->rootpath);
3590                 if (unlikely(status != 0))
3591                         goto out_eio;
3592                 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
3593                         res->nlocations++;
3594         }
3595         if (res->nlocations != 0)
3596                 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3597 out:
3598         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3599         return status;
3600 out_overflow:
3601         print_overflow_msg(__func__, xdr);
3602 out_eio:
3603         status = -EIO;
3604         goto out;
3605 }
3606
3607 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3608 {
3609         __be32 *p;
3610         int status = 0;
3611
3612         *res = 0;
3613         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3614                 return -EIO;
3615         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3616                 p = xdr_inline_decode(xdr, 8);
3617                 if (unlikely(!p))
3618                         goto out_overflow;
3619                 xdr_decode_hyper(p, res);
3620                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3621         }
3622         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3623         return status;
3624 out_overflow:
3625         print_overflow_msg(__func__, xdr);
3626         return -EIO;
3627 }
3628
3629 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3630 {
3631         __be32 *p;
3632         int status = 0;
3633
3634         *maxlink = 1;
3635         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3636                 return -EIO;
3637         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3638                 p = xdr_inline_decode(xdr, 4);
3639                 if (unlikely(!p))
3640                         goto out_overflow;
3641                 *maxlink = be32_to_cpup(p);
3642                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3643         }
3644         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3645         return status;
3646 out_overflow:
3647         print_overflow_msg(__func__, xdr);
3648         return -EIO;
3649 }
3650
3651 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3652 {
3653         __be32 *p;
3654         int status = 0;
3655
3656         *maxname = 1024;
3657         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3658                 return -EIO;
3659         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3660                 p = xdr_inline_decode(xdr, 4);
3661                 if (unlikely(!p))
3662                         goto out_overflow;
3663                 *maxname = be32_to_cpup(p);
3664                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3665         }
3666         dprintk("%s: maxname=%u\n", __func__, *maxname);
3667         return status;
3668 out_overflow:
3669         print_overflow_msg(__func__, xdr);
3670         return -EIO;
3671 }
3672
3673 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3674 {
3675         __be32 *p;
3676         int status = 0;
3677
3678         *res = 1024;
3679         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3680                 return -EIO;
3681         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3682                 uint64_t maxread;
3683                 p = xdr_inline_decode(xdr, 8);
3684                 if (unlikely(!p))
3685                         goto out_overflow;
3686                 xdr_decode_hyper(p, &maxread);
3687                 if (maxread > 0x7FFFFFFF)
3688                         maxread = 0x7FFFFFFF;
3689                 *res = (uint32_t)maxread;
3690                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3691         }
3692         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3693         return status;
3694 out_overflow:
3695         print_overflow_msg(__func__, xdr);
3696         return -EIO;
3697 }
3698
3699 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3700 {
3701         __be32 *p;
3702         int status = 0;
3703
3704         *res = 1024;
3705         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3706                 return -EIO;
3707         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3708                 uint64_t maxwrite;
3709                 p = xdr_inline_decode(xdr, 8);
3710                 if (unlikely(!p))
3711                         goto out_overflow;
3712                 xdr_decode_hyper(p, &maxwrite);
3713                 if (maxwrite > 0x7FFFFFFF)
3714                         maxwrite = 0x7FFFFFFF;
3715                 *res = (uint32_t)maxwrite;
3716                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3717         }
3718         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3719         return status;
3720 out_overflow:
3721         print_overflow_msg(__func__, xdr);
3722         return -EIO;
3723 }
3724
3725 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3726 {
3727         uint32_t tmp;
3728         __be32 *p;
3729         int ret = 0;
3730
3731         *mode = 0;
3732         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3733                 return -EIO;
3734         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3735                 p = xdr_inline_decode(xdr, 4);
3736                 if (unlikely(!p))
3737                         goto out_overflow;
3738                 tmp = be32_to_cpup(p);
3739                 *mode = tmp & ~S_IFMT;
3740                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3741                 ret = NFS_ATTR_FATTR_MODE;
3742         }
3743         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3744         return ret;
3745 out_overflow:
3746         print_overflow_msg(__func__, xdr);
3747         return -EIO;
3748 }
3749
3750 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3751 {
3752         __be32 *p;
3753         int ret = 0;
3754
3755         *nlink = 1;
3756         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3757                 return -EIO;
3758         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3759                 p = xdr_inline_decode(xdr, 4);
3760                 if (unlikely(!p))
3761                         goto out_overflow;
3762                 *nlink = be32_to_cpup(p);
3763                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3764                 ret = NFS_ATTR_FATTR_NLINK;
3765         }
3766         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3767         return ret;
3768 out_overflow:
3769         print_overflow_msg(__func__, xdr);
3770         return -EIO;
3771 }
3772
3773 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3774                 const struct nfs_server *server, uint32_t *uid,
3775                 struct nfs4_string *owner_name)
3776 {
3777         uint32_t len;
3778         __be32 *p;
3779         int ret = 0;
3780
3781         *uid = -2;
3782         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3783                 return -EIO;
3784         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3785                 p = xdr_inline_decode(xdr, 4);
3786                 if (unlikely(!p))
3787                         goto out_overflow;
3788                 len = be32_to_cpup(p);
3789                 p = xdr_inline_decode(xdr, len);
3790                 if (unlikely(!p))
3791                         goto out_overflow;
3792                 if (owner_name != NULL) {
3793                         owner_name->data = kmemdup(p, len, GFP_NOWAIT);
3794                         if (owner_name->data != NULL) {
3795                                 owner_name->len = len;
3796                                 ret = NFS_ATTR_FATTR_OWNER_NAME;
3797                         }
3798                 } else if (len < XDR_MAX_NETOBJ) {
3799                         if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3800                                 ret = NFS_ATTR_FATTR_OWNER;
3801                         else
3802                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3803                                                 __func__);
3804                 } else
3805                         dprintk("%s: name too long (%u)!\n",
3806                                         __func__, len);
3807                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3808         }
3809         dprintk("%s: uid=%d\n", __func__, (int)*uid);
3810         return ret;
3811 out_overflow:
3812         print_overflow_msg(__func__, xdr);
3813         return -EIO;
3814 }
3815
3816 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3817                 const struct nfs_server *server, uint32_t *gid,
3818                 struct nfs4_string *group_name)
3819 {
3820         uint32_t len;
3821         __be32 *p;
3822         int ret = 0;
3823
3824         *gid = -2;
3825         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3826                 return -EIO;
3827         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3828                 p = xdr_inline_decode(xdr, 4);
3829                 if (unlikely(!p))
3830                         goto out_overflow;
3831                 len = be32_to_cpup(p);
3832                 p = xdr_inline_decode(xdr, len);
3833                 if (unlikely(!p))
3834                         goto out_overflow;
3835                 if (group_name != NULL) {
3836                         group_name->data = kmemdup(p, len, GFP_NOWAIT);
3837                         if (group_name->data != NULL) {
3838                                 group_name->len = len;
3839                                 ret = NFS_ATTR_FATTR_GROUP_NAME;
3840                         }
3841                 } else if (len < XDR_MAX_NETOBJ) {
3842                         if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3843                                 ret = NFS_ATTR_FATTR_GROUP;
3844                         else
3845                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3846                                                 __func__);
3847                 } else
3848                         dprintk("%s: name too long (%u)!\n",
3849                                         __func__, len);
3850                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3851         }
3852         dprintk("%s: gid=%d\n", __func__, (int)*gid);
3853         return ret;
3854 out_overflow:
3855         print_overflow_msg(__func__, xdr);
3856         return -EIO;
3857 }
3858
3859 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3860 {
3861         uint32_t major = 0, minor = 0;
3862         __be32 *p;
3863         int ret = 0;
3864
3865         *rdev = MKDEV(0,0);
3866         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3867                 return -EIO;
3868         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3869                 dev_t tmp;
3870
3871                 p = xdr_inline_decode(xdr, 8);
3872                 if (unlikely(!p))
3873                         goto out_overflow;
3874                 major = be32_to_cpup(p++);
3875                 minor = be32_to_cpup(p);
3876                 tmp = MKDEV(major, minor);
3877                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3878                         *rdev = tmp;
3879                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3880                 ret = NFS_ATTR_FATTR_RDEV;
3881         }
3882         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3883         return ret;
3884 out_overflow:
3885         print_overflow_msg(__func__, xdr);
3886         return -EIO;
3887 }
3888
3889 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3890 {
3891         __be32 *p;
3892         int status = 0;
3893
3894         *res = 0;
3895         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3896                 return -EIO;
3897         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3898                 p = xdr_inline_decode(xdr, 8);
3899                 if (unlikely(!p))
3900                         goto out_overflow;
3901                 xdr_decode_hyper(p, res);
3902                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3903         }
3904         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3905         return status;
3906 out_overflow:
3907         print_overflow_msg(__func__, xdr);
3908         return -EIO;
3909 }
3910
3911 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3912 {
3913         __be32 *p;
3914         int status = 0;
3915
3916         *res = 0;
3917         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3918                 return -EIO;
3919         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3920                 p = xdr_inline_decode(xdr, 8);
3921                 if (unlikely(!p))
3922                         goto out_overflow;
3923                 xdr_decode_hyper(p, res);
3924                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3925         }
3926         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3927         return status;
3928 out_overflow:
3929         print_overflow_msg(__func__, xdr);
3930         return -EIO;
3931 }
3932
3933 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3934 {
3935         __be32 *p;
3936         int status = 0;
3937
3938         *res = 0;
3939         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3940                 return -EIO;
3941         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3942                 p = xdr_inline_decode(xdr, 8);
3943                 if (unlikely(!p))
3944                         goto out_overflow;
3945                 xdr_decode_hyper(p, res);
3946                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3947         }
3948         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3949         return status;
3950 out_overflow:
3951         print_overflow_msg(__func__, xdr);
3952         return -EIO;
3953 }
3954
3955 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3956 {
3957         __be32 *p;
3958         int ret = 0;
3959
3960         *used = 0;
3961         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3962                 return -EIO;
3963         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3964                 p = xdr_inline_decode(xdr, 8);
3965                 if (unlikely(!p))
3966                         goto out_overflow;
3967                 xdr_decode_hyper(p, used);
3968                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3969                 ret = NFS_ATTR_FATTR_SPACE_USED;
3970         }
3971         dprintk("%s: space used=%Lu\n", __func__,
3972                         (unsigned long long)*used);
3973         return ret;
3974 out_overflow:
3975         print_overflow_msg(__func__, xdr);
3976         return -EIO;
3977 }
3978
3979 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
3980 {
3981         __be32 *p;
3982         uint64_t sec;
3983         uint32_t nsec;
3984
3985         p = xdr_inline_decode(xdr, 12);
3986         if (unlikely(!p))
3987                 goto out_overflow;
3988         p = xdr_decode_hyper(p, &sec);
3989         nsec = be32_to_cpup(p);
3990         time->tv_sec = (time_t)sec;
3991         time->tv_nsec = (long)nsec;
3992         return 0;
3993 out_overflow:
3994         print_overflow_msg(__func__, xdr);
3995         return -EIO;
3996 }
3997
3998 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3999 {
4000         int status = 0;
4001
4002         time->tv_sec = 0;
4003         time->tv_nsec = 0;
4004         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4005                 return -EIO;
4006         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4007                 status = decode_attr_time(xdr, time);
4008                 if (status == 0)
4009                         status = NFS_ATTR_FATTR_ATIME;
4010                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4011         }
4012         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4013         return status;
4014 }
4015
4016 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4017 {
4018         int status = 0;
4019
4020         time->tv_sec = 0;
4021         time->tv_nsec = 0;
4022         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4023                 return -EIO;
4024         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4025                 status = decode_attr_time(xdr, time);
4026                 if (status == 0)
4027                         status = NFS_ATTR_FATTR_CTIME;
4028                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4029         }
4030         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4031         return status;
4032 }
4033
4034 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4035                                   struct timespec *time)
4036 {
4037         int status = 0;
4038
4039         time->tv_sec = 0;
4040         time->tv_nsec = 0;
4041         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4042                 return -EIO;
4043         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4044                 status = decode_attr_time(xdr, time);
4045                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4046         }
4047         dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4048                 (long)time->tv_nsec);
4049         return status;
4050 }
4051
4052 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4053 {
4054         int status = 0;
4055
4056         time->tv_sec = 0;
4057         time->tv_nsec = 0;
4058         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4059                 return -EIO;
4060         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4061                 status = decode_attr_time(xdr, time);
4062                 if (status == 0)
4063                         status = NFS_ATTR_FATTR_MTIME;
4064                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4065         }
4066         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4067         return status;
4068 }
4069
4070 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
4071 {
4072         unsigned int attrwords = XDR_QUADLEN(attrlen);
4073         unsigned int nwords = xdr->p - savep;
4074
4075         if (unlikely(attrwords != nwords)) {
4076                 dprintk("%s: server returned incorrect attribute length: "
4077                         "%u %c %u\n",
4078                                 __func__,
4079                                 attrwords << 2,
4080                                 (attrwords < nwords) ? '<' : '>',
4081                                 nwords << 2);
4082                 return -EIO;
4083         }
4084         return 0;
4085 }
4086
4087 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4088 {
4089         __be32 *p;
4090
4091         p = xdr_inline_decode(xdr, 20);
4092         if (unlikely(!p))
4093                 goto out_overflow;
4094         cinfo->atomic = be32_to_cpup(p++);
4095         p = xdr_decode_hyper(p, &cinfo->before);
4096         xdr_decode_hyper(p, &cinfo->after);
4097         return 0;
4098 out_overflow:
4099         print_overflow_msg(__func__, xdr);
4100         return -EIO;
4101 }
4102
4103 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
4104 {
4105         __be32 *p;
4106         uint32_t supp, acc;
4107         int status;
4108
4109         status = decode_op_hdr(xdr, OP_ACCESS);
4110         if (status)
4111                 return status;
4112         p = xdr_inline_decode(xdr, 8);
4113         if (unlikely(!p))
4114                 goto out_overflow;
4115         supp = be32_to_cpup(p++);
4116         acc = be32_to_cpup(p);
4117         access->supported = supp;
4118         access->access = acc;
4119         return 0;
4120 out_overflow:
4121         print_overflow_msg(__func__, xdr);
4122         return -EIO;
4123 }
4124
4125 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4126 {
4127         __be32 *p;
4128
4129         p = xdr_inline_decode(xdr, len);
4130         if (likely(p)) {
4131                 memcpy(buf, p, len);
4132                 return 0;
4133         }
4134         print_overflow_msg(__func__, xdr);
4135         return -EIO;
4136 }
4137
4138 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4139 {
4140         return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4141 }
4142
4143 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4144 {
4145         int status;
4146
4147         status = decode_op_hdr(xdr, OP_CLOSE);
4148         if (status != -EIO)
4149                 nfs_increment_open_seqid(status, res->seqid);
4150         if (!status)
4151                 status = decode_stateid(xdr, &res->stateid);
4152         return status;
4153 }
4154
4155 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4156 {
4157         return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4158 }
4159
4160 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4161 {
4162         int status;
4163
4164         status = decode_op_hdr(xdr, OP_COMMIT);
4165         if (!status)
4166                 status = decode_verifier(xdr, res->verf->verifier);
4167         return status;
4168 }
4169
4170 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4171 {
4172         __be32 *p;
4173         uint32_t bmlen;
4174         int status;
4175
4176         status = decode_op_hdr(xdr, OP_CREATE);
4177         if (status)
4178                 return status;
4179         if ((status = decode_change_info(xdr, cinfo)))
4180                 return status;
4181         p = xdr_inline_decode(xdr, 4);
4182         if (unlikely(!p))
4183                 goto out_overflow;
4184         bmlen = be32_to_cpup(p);
4185         p = xdr_inline_decode(xdr, bmlen << 2);
4186         if (likely(p))
4187                 return 0;
4188 out_overflow:
4189         print_overflow_msg(__func__, xdr);
4190         return -EIO;
4191 }
4192
4193 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4194 {
4195         __be32 *savep;
4196         uint32_t attrlen, bitmap[3] = {0};
4197         int status;
4198
4199         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4200                 goto xdr_error;
4201         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4202                 goto xdr_error;
4203         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4204                 goto xdr_error;
4205         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4206                 goto xdr_error;
4207         if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4208                                                  &res->fh_expire_type)) != 0)
4209                 goto xdr_error;
4210         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4211                 goto xdr_error;
4212         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4213                 goto xdr_error;
4214         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4215                 goto xdr_error;
4216         status = verify_attr_len(xdr, savep, attrlen);
4217 xdr_error:
4218         dprintk("%s: xdr returned %d!\n", __func__, -status);
4219         return status;
4220 }
4221
4222 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4223 {
4224         __be32 *savep;
4225         uint32_t attrlen, bitmap[3] = {0};
4226         int status;
4227
4228         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4229                 goto xdr_error;
4230         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4231                 goto xdr_error;
4232         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4233                 goto xdr_error;
4234
4235         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4236                 goto xdr_error;
4237         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4238                 goto xdr_error;
4239         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4240                 goto xdr_error;
4241         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4242                 goto xdr_error;
4243         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4244                 goto xdr_error;
4245         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4246                 goto xdr_error;
4247
4248         status = verify_attr_len(xdr, savep, attrlen);
4249 xdr_error:
4250         dprintk("%s: xdr returned %d!\n", __func__, -status);
4251         return status;
4252 }
4253
4254 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4255 {
4256         __be32 *savep;
4257         uint32_t attrlen, bitmap[3] = {0};
4258         int status;
4259
4260         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4261                 goto xdr_error;
4262         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4263                 goto xdr_error;
4264         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4265                 goto xdr_error;
4266
4267         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4268                 goto xdr_error;
4269         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4270                 goto xdr_error;
4271
4272         status = verify_attr_len(xdr, savep, attrlen);
4273 xdr_error:
4274         dprintk("%s: xdr returned %d!\n", __func__, -status);
4275         return status;
4276 }
4277
4278 static int decode_threshold_hint(struct xdr_stream *xdr,
4279                                   uint32_t *bitmap,
4280                                   uint64_t *res,
4281                                   uint32_t hint_bit)
4282 {
4283         __be32 *p;
4284
4285         *res = 0;
4286         if (likely(bitmap[0] & hint_bit)) {
4287                 p = xdr_inline_decode(xdr, 8);
4288                 if (unlikely(!p))
4289                         goto out_overflow;
4290                 xdr_decode_hyper(p, res);
4291         }
4292         return 0;
4293 out_overflow:
4294         print_overflow_msg(__func__, xdr);
4295         return -EIO;
4296 }
4297
4298 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4299                                         struct nfs4_threshold *res)
4300 {
4301         __be32 *p, *savep;
4302         uint32_t bitmap[3] = {0,}, attrlen;
4303         int status;
4304
4305         /* layout type */
4306         p = xdr_inline_decode(xdr, 4);
4307         if (unlikely(!p)) {
4308                 print_overflow_msg(__func__, xdr);
4309                 return -EIO;
4310         }
4311         res->l_type = be32_to_cpup(p);
4312
4313         /* thi_hintset bitmap */
4314         status = decode_attr_bitmap(xdr, bitmap);
4315         if (status < 0)
4316                 goto xdr_error;
4317
4318         /* thi_hintlist length */
4319         status = decode_attr_length(xdr, &attrlen, &savep);
4320         if (status < 0)
4321                 goto xdr_error;
4322         /* thi_hintlist */
4323         status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4324         if (status < 0)
4325                 goto xdr_error;
4326         status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4327         if (status < 0)
4328                 goto xdr_error;
4329         status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4330                                        THRESHOLD_RD_IO);
4331         if (status < 0)
4332                 goto xdr_error;
4333         status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4334                                        THRESHOLD_WR_IO);
4335         if (status < 0)
4336                 goto xdr_error;
4337
4338         status = verify_attr_len(xdr, savep, attrlen);
4339         res->bm = bitmap[0];
4340
4341         dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4342                  __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4343                 res->wr_io_sz);
4344 xdr_error:
4345         dprintk("%s ret=%d!\n", __func__, status);
4346         return status;
4347 }
4348
4349 /*
4350  * Thresholds on pNFS direct I/O vrs MDS I/O
4351  */
4352 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4353                                     uint32_t *bitmap,
4354                                     struct nfs4_threshold *res)
4355 {
4356         __be32 *p;
4357         int status = 0;
4358         uint32_t num;
4359
4360         if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4361                 return -EIO;
4362         if (likely(bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD)) {
4363                 p = xdr_inline_decode(xdr, 4);
4364                 if (unlikely(!p))
4365                         goto out_overflow;
4366                 num = be32_to_cpup(p);
4367                 if (num == 0)
4368                         return 0;
4369                 if (num > 1)
4370                         printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4371                                 "drivers per filesystem not supported\n",
4372                                 __func__);
4373
4374                 status = decode_first_threshold_item4(xdr, res);
4375         }
4376         return status;
4377 out_overflow:
4378         print_overflow_msg(__func__, xdr);
4379         return -EIO;
4380 }
4381
4382 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4383                 struct nfs_fattr *fattr, struct nfs_fh *fh,
4384                 struct nfs4_fs_locations *fs_loc,
4385                 const struct nfs_server *server)
4386 {
4387         int status;
4388         umode_t fmode = 0;
4389         uint32_t type;
4390         int32_t err;
4391
4392         status = decode_attr_type(xdr, bitmap, &type);
4393         if (status < 0)
4394                 goto xdr_error;
4395         fattr->mode = 0;
4396         if (status != 0) {
4397                 fattr->mode |= nfs_type2fmt[type];
4398                 fattr->valid |= status;
4399         }
4400
4401         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4402         if (status < 0)
4403                 goto xdr_error;
4404         fattr->valid |= status;
4405
4406         status = decode_attr_size(xdr, bitmap, &fattr->size);
4407         if (status < 0)
4408                 goto xdr_error;
4409         fattr->valid |= status;
4410
4411         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4412         if (status < 0)
4413                 goto xdr_error;
4414         fattr->valid |= status;
4415
4416         err = 0;
4417         status = decode_attr_error(xdr, bitmap, &err);
4418         if (status < 0)
4419                 goto xdr_error;
4420
4421         status = decode_attr_filehandle(xdr, bitmap, fh);
4422         if (status < 0)
4423                 goto xdr_error;
4424
4425         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4426         if (status < 0)
4427                 goto xdr_error;
4428         fattr->valid |= status;
4429
4430         status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4431         if (status < 0)
4432                 goto xdr_error;
4433         fattr->valid |= status;
4434
4435         status = decode_attr_mode(xdr, bitmap, &fmode);
4436         if (status < 0)
4437                 goto xdr_error;
4438         if (status != 0) {
4439                 fattr->mode |= fmode;
4440                 fattr->valid |= status;
4441         }
4442
4443         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4444         if (status < 0)
4445                 goto xdr_error;
4446         fattr->valid |= status;
4447
4448         status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4449         if (status < 0)
4450                 goto xdr_error;
4451         fattr->valid |= status;
4452
4453         status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4454         if (status < 0)
4455                 goto xdr_error;
4456         fattr->valid |= status;
4457
4458         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4459         if (status < 0)
4460                 goto xdr_error;
4461         fattr->valid |= status;
4462
4463         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4464         if (status < 0)
4465                 goto xdr_error;
4466         fattr->valid |= status;
4467
4468         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4469         if (status < 0)
4470                 goto xdr_error;
4471         fattr->valid |= status;
4472
4473         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4474         if (status < 0)
4475                 goto xdr_error;
4476         fattr->valid |= status;
4477
4478         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4479         if (status < 0)
4480                 goto xdr_error;
4481         fattr->valid |= status;
4482
4483         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4484         if (status < 0)
4485                 goto xdr_error;
4486         fattr->valid |= status;
4487
4488         status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4489         if (status < 0)
4490                 goto xdr_error;
4491
4492 xdr_error:
4493         dprintk("%s: xdr returned %d\n", __func__, -status);
4494         return status;
4495 }
4496
4497 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4498                 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4499                 const struct nfs_server *server)
4500 {
4501         __be32 *savep;
4502         uint32_t attrlen,
4503                  bitmap[3] = {0};
4504         int status;
4505
4506         status = decode_op_hdr(xdr, OP_GETATTR);
4507         if (status < 0)
4508                 goto xdr_error;
4509
4510         status = decode_attr_bitmap(xdr, bitmap);
4511         if (status < 0)
4512                 goto xdr_error;
4513
4514         status = decode_attr_length(xdr, &attrlen, &savep);
4515         if (status < 0)
4516                 goto xdr_error;
4517
4518         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc, server);
4519         if (status < 0)
4520                 goto xdr_error;
4521
4522         status = verify_attr_len(xdr, savep, attrlen);
4523 xdr_error:
4524         dprintk("%s: xdr returned %d\n", __func__, -status);
4525         return status;
4526 }
4527
4528 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4529                 const struct nfs_server *server)
4530 {
4531         return decode_getfattr_generic(xdr, fattr, NULL, NULL, server);
4532 }
4533
4534 /*
4535  * Decode potentially multiple layout types. Currently we only support
4536  * one layout driver per file system.
4537  */
4538 static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4539                                          uint32_t *layouttype)
4540 {
4541         uint32_t *p;
4542         int num;
4543
4544         p = xdr_inline_decode(xdr, 4);
4545         if (unlikely(!p))
4546                 goto out_overflow;
4547         num = be32_to_cpup(p);
4548
4549         /* pNFS is not supported by the underlying file system */
4550         if (num == 0) {
4551                 *layouttype = 0;
4552                 return 0;
4553         }
4554         if (num > 1)
4555                 printk(KERN_INFO "NFS: %s: Warning: Multiple pNFS layout "
4556                         "drivers per filesystem not supported\n", __func__);
4557
4558         /* Decode and set first layout type, move xdr->p past unused types */
4559         p = xdr_inline_decode(xdr, num * 4);
4560         if (unlikely(!p))
4561                 goto out_overflow;
4562         *layouttype = be32_to_cpup(p);
4563         return 0;
4564 out_overflow:
4565         print_overflow_msg(__func__, xdr);
4566         return -EIO;
4567 }
4568
4569 /*
4570  * The type of file system exported.
4571  * Note we must ensure that layouttype is set in any non-error case.
4572  */
4573 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4574                                 uint32_t *layouttype)
4575 {
4576         int status = 0;
4577
4578         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4579         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4580                 return -EIO;
4581         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4582                 status = decode_first_pnfs_layout_type(xdr, layouttype);
4583                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4584         } else
4585                 *layouttype = 0;
4586         return status;
4587 }
4588
4589 /*
4590  * The prefered block size for layout directed io
4591  */
4592 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4593                                       uint32_t *res)
4594 {
4595         __be32 *p;
4596
4597         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4598         *res = 0;
4599         if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4600                 p = xdr_inline_decode(xdr, 4);
4601                 if (unlikely(!p)) {
4602                         print_overflow_msg(__func__, xdr);
4603                         return -EIO;
4604                 }
4605                 *res = be32_to_cpup(p);
4606                 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4607         }
4608         return 0;
4609 }
4610
4611 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4612 {
4613         __be32 *savep;
4614         uint32_t attrlen, bitmap[3];
4615         int status;
4616
4617         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4618                 goto xdr_error;
4619         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4620                 goto xdr_error;
4621         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4622                 goto xdr_error;
4623
4624         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4625
4626         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4627                 goto xdr_error;
4628         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4629                 goto xdr_error;
4630         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4631                 goto xdr_error;
4632         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4633         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4634                 goto xdr_error;
4635         fsinfo->wtpref = fsinfo->wtmax;
4636         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4637         if (status != 0)
4638                 goto xdr_error;
4639         status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4640         if (status != 0)
4641                 goto xdr_error;
4642         status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4643         if (status)
4644                 goto xdr_error;
4645
4646         status = verify_attr_len(xdr, savep, attrlen);
4647 xdr_error:
4648         dprintk("%s: xdr returned %d!\n", __func__, -status);
4649         return status;
4650 }
4651
4652 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4653 {
4654         __be32 *p;
4655         uint32_t len;
4656         int status;
4657
4658         /* Zero handle first to allow comparisons */
4659         memset(fh, 0, sizeof(*fh));
4660
4661         status = decode_op_hdr(xdr, OP_GETFH);
4662         if (status)
4663                 return status;
4664
4665         p = xdr_inline_decode(xdr, 4);
4666         if (unlikely(!p))
4667                 goto out_overflow;
4668         len = be32_to_cpup(p);
4669         if (len > NFS4_FHSIZE)
4670                 return -EIO;
4671         fh->size = len;
4672         p = xdr_inline_decode(xdr, len);
4673         if (unlikely(!p))
4674                 goto out_overflow;
4675         memcpy(fh->data, p, len);
4676         return 0;
4677 out_overflow:
4678         print_overflow_msg(__func__, xdr);
4679         return -EIO;
4680 }
4681
4682 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4683 {
4684         int status;
4685
4686         status = decode_op_hdr(xdr, OP_LINK);
4687         if (status)
4688                 return status;
4689         return decode_change_info(xdr, cinfo);
4690 }
4691
4692 /*
4693  * We create the owner, so we know a proper owner.id length is 4.
4694  */
4695 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4696 {
4697         uint64_t offset, length, clientid;
4698         __be32 *p;
4699         uint32_t namelen, type;
4700
4701         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4702         if (unlikely(!p))
4703                 goto out_overflow;
4704         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4705         p = xdr_decode_hyper(p, &length);
4706         type = be32_to_cpup(p++); /* 4 byte read */
4707         if (fl != NULL) { /* manipulate file lock */
4708                 fl->fl_start = (loff_t)offset;
4709                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4710                 if (length == ~(uint64_t)0)
4711                         fl->fl_end = OFFSET_MAX;
4712                 fl->fl_type = F_WRLCK;
4713                 if (type & 1)
4714                         fl->fl_type = F_RDLCK;
4715                 fl->fl_pid = 0;
4716         }
4717         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4718         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4719         p = xdr_inline_decode(xdr, namelen); /* variable size field */
4720         if (likely(p))
4721                 return -NFS4ERR_DENIED;
4722 out_overflow:
4723         print_overflow_msg(__func__, xdr);
4724         return -EIO;
4725 }
4726
4727 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4728 {
4729         int status;
4730
4731         status = decode_op_hdr(xdr, OP_LOCK);
4732         if (status == -EIO)
4733                 goto out;
4734         if (status == 0) {
4735                 status = decode_stateid(xdr, &res->stateid);
4736                 if (unlikely(status))
4737                         goto out;
4738         } else if (status == -NFS4ERR_DENIED)
4739                 status = decode_lock_denied(xdr, NULL);
4740         if (res->open_seqid != NULL)
4741                 nfs_increment_open_seqid(status, res->open_seqid);
4742         nfs_increment_lock_seqid(status, res->lock_seqid);
4743 out:
4744         return status;
4745 }
4746
4747 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4748 {
4749         int status;
4750         status = decode_op_hdr(xdr, OP_LOCKT);
4751         if (status == -NFS4ERR_DENIED)
4752                 return decode_lock_denied(xdr, res->denied);
4753         return status;
4754 }
4755
4756 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4757 {
4758         int status;
4759
4760         status = decode_op_hdr(xdr, OP_LOCKU);
4761         if (status != -EIO)
4762                 nfs_increment_lock_seqid(status, res->seqid);
4763         if (status == 0)
4764                 status = decode_stateid(xdr, &res->stateid);
4765         return status;
4766 }
4767
4768 static int decode_release_lockowner(struct xdr_stream *xdr)
4769 {
4770         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4771 }
4772
4773 static int decode_lookup(struct xdr_stream *xdr)
4774 {
4775         return decode_op_hdr(xdr, OP_LOOKUP);
4776 }
4777
4778 /* This is too sick! */
4779 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4780 {
4781         __be32 *p;
4782         uint32_t limit_type, nblocks, blocksize;
4783
4784         p = xdr_inline_decode(xdr, 12);
4785         if (unlikely(!p))
4786                 goto out_overflow;
4787         limit_type = be32_to_cpup(p++);
4788         switch (limit_type) {
4789         case 1:
4790                 xdr_decode_hyper(p, maxsize);
4791                 break;
4792         case 2:
4793                 nblocks = be32_to_cpup(p++);
4794                 blocksize = be32_to_cpup(p);
4795                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4796         }
4797         return 0;
4798 out_overflow:
4799         print_overflow_msg(__func__, xdr);
4800         return -EIO;
4801 }
4802
4803 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4804 {
4805         __be32 *p;
4806         uint32_t delegation_type;
4807         int status;
4808
4809         p = xdr_inline_decode(xdr, 4);
4810         if (unlikely(!p))
4811                 goto out_overflow;
4812         delegation_type = be32_to_cpup(p);
4813         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4814                 res->delegation_type = 0;
4815                 return 0;
4816         }
4817         status = decode_stateid(xdr, &res->delegation);
4818         if (unlikely(status))
4819                 return status;
4820         p = xdr_inline_decode(xdr, 4);
4821         if (unlikely(!p))
4822                 goto out_overflow;
4823         res->do_recall = be32_to_cpup(p);
4824
4825         switch (delegation_type) {
4826         case NFS4_OPEN_DELEGATE_READ:
4827                 res->delegation_type = FMODE_READ;
4828                 break;
4829         case NFS4_OPEN_DELEGATE_WRITE:
4830                 res->delegation_type = FMODE_WRITE|FMODE_READ;
4831                 if (decode_space_limit(xdr, &res->maxsize) < 0)
4832                                 return -EIO;
4833         }
4834         return decode_ace(xdr, NULL, res->server->nfs_client);
4835 out_overflow:
4836         print_overflow_msg(__func__, xdr);
4837         return -EIO;
4838 }
4839
4840 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
4841 {
4842         __be32 *p;
4843         uint32_t savewords, bmlen, i;
4844         int status;
4845
4846         status = decode_op_hdr(xdr, OP_OPEN);
4847         if (status != -EIO)
4848                 nfs_increment_open_seqid(status, res->seqid);
4849         if (!status)
4850                 status = decode_stateid(xdr, &res->stateid);
4851         if (unlikely(status))
4852                 return status;
4853
4854         decode_change_info(xdr, &res->cinfo);
4855
4856         p = xdr_inline_decode(xdr, 8);
4857         if (unlikely(!p))
4858                 goto out_overflow;
4859         res->rflags = be32_to_cpup(p++);
4860         bmlen = be32_to_cpup(p);
4861         if (bmlen > 10)
4862                 goto xdr_error;
4863
4864         p = xdr_inline_decode(xdr, bmlen << 2);
4865         if (unlikely(!p))
4866                 goto out_overflow;
4867         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
4868         for (i = 0; i < savewords; ++i)
4869                 res->attrset[i] = be32_to_cpup(p++);
4870         for (; i < NFS4_BITMAP_SIZE; i++)
4871                 res->attrset[i] = 0;
4872
4873         return decode_delegation(xdr, res);
4874 xdr_error:
4875         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
4876         return -EIO;
4877 out_overflow:
4878         print_overflow_msg(__func__, xdr);
4879         return -EIO;
4880 }
4881
4882 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
4883 {
4884         int status;
4885
4886         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
4887         if (status != -EIO)
4888                 nfs_increment_open_seqid(status, res->seqid);
4889         if (!status)
4890                 status = decode_stateid(xdr, &res->stateid);
4891         return status;
4892 }
4893
4894 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
4895 {
4896         int status;
4897
4898         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
4899         if (status != -EIO)
4900                 nfs_increment_open_seqid(status, res->seqid);
4901         if (!status)
4902                 status = decode_stateid(xdr, &res->stateid);
4903         return status;
4904 }
4905
4906 static int decode_putfh(struct xdr_stream *xdr)
4907 {
4908         return decode_op_hdr(xdr, OP_PUTFH);
4909 }
4910
4911 static int decode_putrootfh(struct xdr_stream *xdr)
4912 {
4913         return decode_op_hdr(xdr, OP_PUTROOTFH);
4914 }
4915
4916 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
4917 {
4918         struct kvec *iov = req->rq_rcv_buf.head;
4919         __be32 *p;
4920         uint32_t count, eof, recvd, hdrlen;
4921         int status;
4922
4923         status = decode_op_hdr(xdr, OP_READ);
4924         if (status)
4925                 return status;
4926         p = xdr_inline_decode(xdr, 8);
4927         if (unlikely(!p))
4928                 goto out_overflow;
4929         eof = be32_to_cpup(p++);
4930         count = be32_to_cpup(p);
4931         hdrlen = (u8 *) xdr->p - (u8 *) iov->iov_base;
4932         recvd = req->rq_rcv_buf.len - hdrlen;
4933         if (count > recvd) {
4934                 dprintk("NFS: server cheating in read reply: "
4935                                 "count %u > recvd %u\n", count, recvd);
4936                 count = recvd;
4937                 eof = 0;
4938         }
4939         xdr_read_pages(xdr, count);
4940         res->eof = eof;
4941         res->count = count;
4942         return 0;
4943 out_overflow:
4944         print_overflow_msg(__func__, xdr);
4945         return -EIO;
4946 }
4947
4948 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
4949 {
4950         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
4951         struct kvec     *iov = rcvbuf->head;
4952         size_t          hdrlen;
4953         u32             recvd, pglen = rcvbuf->page_len;
4954         int             status;
4955         __be32          verf[2];
4956
4957         status = decode_op_hdr(xdr, OP_READDIR);
4958         if (!status)
4959                 status = decode_verifier(xdr, readdir->verifier.data);
4960         if (unlikely(status))
4961                 return status;
4962         memcpy(verf, readdir->verifier.data, sizeof(verf));
4963         dprintk("%s: verifier = %08x:%08x\n",
4964                         __func__, verf[0], verf[1]);
4965
4966         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4967         recvd = rcvbuf->len - hdrlen;
4968         if (pglen > recvd)
4969                 pglen = recvd;
4970         xdr_read_pages(xdr, pglen);
4971
4972
4973         return pglen;
4974 }
4975
4976 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
4977 {
4978         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4979         struct kvec *iov = rcvbuf->head;
4980         size_t hdrlen;
4981         u32 len, recvd;
4982         __be32 *p;
4983         int status;
4984
4985         status = decode_op_hdr(xdr, OP_READLINK);
4986         if (status)
4987                 return status;
4988
4989         /* Convert length of symlink */
4990         p = xdr_inline_decode(xdr, 4);
4991         if (unlikely(!p))
4992                 goto out_overflow;
4993         len = be32_to_cpup(p);
4994         if (len >= rcvbuf->page_len || len <= 0) {
4995                 dprintk("nfs: server returned giant symlink!\n");
4996                 return -ENAMETOOLONG;
4997         }
4998         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4999         recvd = req->rq_rcv_buf.len - hdrlen;
5000         if (recvd < len) {
5001                 dprintk("NFS: server cheating in readlink reply: "
5002                                 "count %u > recvd %u\n", len, recvd);
5003                 return -EIO;
5004         }
5005         xdr_read_pages(xdr, len);
5006         /*
5007          * The XDR encode routine has set things up so that
5008          * the link text will be copied directly into the
5009          * buffer.  We just have to do overflow-checking,
5010          * and and null-terminate the text (the VFS expects
5011          * null-termination).
5012          */
5013         xdr_terminate_string(rcvbuf, len);
5014         return 0;
5015 out_overflow:
5016         print_overflow_msg(__func__, xdr);
5017         return -EIO;
5018 }
5019
5020 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5021 {
5022         int status;
5023
5024         status = decode_op_hdr(xdr, OP_REMOVE);
5025         if (status)
5026                 goto out;
5027         status = decode_change_info(xdr, cinfo);
5028 out:
5029         return status;
5030 }
5031
5032 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5033               struct nfs4_change_info *new_cinfo)
5034 {
5035         int status;
5036
5037         status = decode_op_hdr(xdr, OP_RENAME);
5038         if (status)
5039                 goto out;
5040         if ((status = decode_change_info(xdr, old_cinfo)))
5041                 goto out;
5042         status = decode_change_info(xdr, new_cinfo);
5043 out:
5044         return status;
5045 }
5046
5047 static int decode_renew(struct xdr_stream *xdr)
5048 {
5049         return decode_op_hdr(xdr, OP_RENEW);
5050 }
5051
5052 static int
5053 decode_restorefh(struct xdr_stream *xdr)
5054 {
5055         return decode_op_hdr(xdr, OP_RESTOREFH);
5056 }
5057
5058 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5059                          struct nfs_getaclres *res)
5060 {
5061         __be32 *savep, *bm_p;
5062         uint32_t attrlen,
5063                  bitmap[3] = {0};
5064         struct kvec *iov = req->rq_rcv_buf.head;
5065         int status;
5066         size_t page_len = xdr->buf->page_len;
5067
5068         res->acl_len = 0;
5069         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5070                 goto out;
5071
5072         bm_p = xdr->p;
5073         res->acl_data_offset = be32_to_cpup(bm_p) + 2;
5074         res->acl_data_offset <<= 2;
5075         /* Check if the acl data starts beyond the allocated buffer */
5076         if (res->acl_data_offset > page_len)
5077                 return -ERANGE;
5078
5079         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5080                 goto out;
5081         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5082                 goto out;
5083
5084         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5085                 return -EIO;
5086         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5087                 size_t hdrlen;
5088
5089                 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5090                  * are stored with the acl data to handle the problem of
5091                  * variable length bitmaps.*/
5092                 xdr->p = bm_p;
5093
5094                 /* We ignore &savep and don't do consistency checks on
5095                  * the attr length.  Let userspace figure it out.... */
5096                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
5097                 attrlen += res->acl_data_offset;
5098                 if (attrlen > page_len) {
5099                         if (res->acl_flags & NFS4_ACL_LEN_REQUEST) {
5100                                 /* getxattr interface called with a NULL buf */
5101                                 res->acl_len = attrlen;
5102                                 goto out;
5103                         }
5104                         dprintk("NFS: acl reply: attrlen %u > page_len %zu\n",
5105                                         attrlen, page_len);
5106                         return -EINVAL;
5107                 }
5108                 xdr_read_pages(xdr, attrlen);
5109                 res->acl_len = attrlen;
5110         } else
5111                 status = -EOPNOTSUPP;
5112
5113 out:
5114         return status;
5115 }
5116
5117 static int
5118 decode_savefh(struct xdr_stream *xdr)
5119 {
5120         return decode_op_hdr(xdr, OP_SAVEFH);
5121 }
5122
5123 static int decode_setattr(struct xdr_stream *xdr)
5124 {
5125         __be32 *p;
5126         uint32_t bmlen;
5127         int status;
5128
5129         status = decode_op_hdr(xdr, OP_SETATTR);
5130         if (status)
5131                 return status;
5132         p = xdr_inline_decode(xdr, 4);
5133         if (unlikely(!p))
5134                 goto out_overflow;
5135         bmlen = be32_to_cpup(p);
5136         p = xdr_inline_decode(xdr, bmlen << 2);
5137         if (likely(p))
5138                 return 0;
5139 out_overflow:
5140         print_overflow_msg(__func__, xdr);
5141         return -EIO;
5142 }
5143
5144 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5145 {
5146         __be32 *p;
5147         uint32_t opnum;
5148         int32_t nfserr;
5149
5150         p = xdr_inline_decode(xdr, 8);
5151         if (unlikely(!p))
5152                 goto out_overflow;
5153         opnum = be32_to_cpup(p++);
5154         if (opnum != OP_SETCLIENTID) {
5155                 dprintk("nfs: decode_setclientid: Server returned operation"
5156                         " %d\n", opnum);
5157                 return -EIO;
5158         }
5159         nfserr = be32_to_cpup(p);
5160         if (nfserr == NFS_OK) {
5161                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5162                 if (unlikely(!p))
5163                         goto out_overflow;
5164                 p = xdr_decode_hyper(p, &res->clientid);
5165                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5166         } else if (nfserr == NFSERR_CLID_INUSE) {
5167                 uint32_t len;
5168
5169                 /* skip netid string */
5170                 p = xdr_inline_decode(xdr, 4);
5171                 if (unlikely(!p))
5172                         goto out_overflow;
5173                 len = be32_to_cpup(p);
5174                 p = xdr_inline_decode(xdr, len);
5175                 if (unlikely(!p))
5176                         goto out_overflow;
5177
5178                 /* skip uaddr string */
5179                 p = xdr_inline_decode(xdr, 4);
5180                 if (unlikely(!p))
5181                         goto out_overflow;
5182                 len = be32_to_cpup(p);
5183                 p = xdr_inline_decode(xdr, len);
5184                 if (unlikely(!p))
5185                         goto out_overflow;
5186                 return -NFSERR_CLID_INUSE;
5187         } else
5188                 return nfs4_stat_to_errno(nfserr);
5189
5190         return 0;
5191 out_overflow:
5192         print_overflow_msg(__func__, xdr);
5193         return -EIO;
5194 }
5195
5196 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5197 {
5198         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5199 }
5200
5201 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
5202 {
5203         __be32 *p;
5204         int status;
5205
5206         status = decode_op_hdr(xdr, OP_WRITE);
5207         if (status)
5208                 return status;
5209
5210         p = xdr_inline_decode(xdr, 16);
5211         if (unlikely(!p))
5212                 goto out_overflow;
5213         res->count = be32_to_cpup(p++);
5214         res->verf->committed = be32_to_cpup(p++);
5215         memcpy(res->verf->verifier, p, NFS4_VERIFIER_SIZE);
5216         return 0;
5217 out_overflow:
5218         print_overflow_msg(__func__, xdr);
5219         return -EIO;
5220 }
5221
5222 static int decode_delegreturn(struct xdr_stream *xdr)
5223 {
5224         return decode_op_hdr(xdr, OP_DELEGRETURN);
5225 }
5226
5227 static int decode_secinfo_gss(struct xdr_stream *xdr, struct nfs4_secinfo_flavor *flavor)
5228 {
5229         __be32 *p;
5230
5231         p = xdr_inline_decode(xdr, 4);
5232         if (unlikely(!p))
5233                 goto out_overflow;
5234         flavor->gss.sec_oid4.len = be32_to_cpup(p);
5235         if (flavor->gss.sec_oid4.len > GSS_OID_MAX_LEN)
5236                 goto out_err;
5237
5238         p = xdr_inline_decode(xdr, flavor->gss.sec_oid4.len);
5239         if (unlikely(!p))
5240                 goto out_overflow;
5241         memcpy(flavor->gss.sec_oid4.data, p, flavor->gss.sec_oid4.len);
5242
5243         p = xdr_inline_decode(xdr, 8);
5244         if (unlikely(!p))
5245                 goto out_overflow;
5246         flavor->gss.qop4 = be32_to_cpup(p++);
5247         flavor->gss.service = be32_to_cpup(p);
5248
5249         return 0;
5250
5251 out_overflow:
5252         print_overflow_msg(__func__, xdr);
5253         return -EIO;
5254 out_err:
5255         return -EINVAL;
5256 }
5257
5258 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5259 {
5260         struct nfs4_secinfo_flavor *sec_flavor;
5261         int status;
5262         __be32 *p;
5263         int i, num_flavors;
5264
5265         p = xdr_inline_decode(xdr, 4);
5266         if (unlikely(!p))
5267                 goto out_overflow;
5268
5269         res->flavors->num_flavors = 0;
5270         num_flavors = be32_to_cpup(p);
5271
5272         for (i = 0; i < num_flavors; i++) {
5273                 sec_flavor = &res->flavors->flavors[i];
5274                 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5275                         break;
5276
5277                 p = xdr_inline_decode(xdr, 4);
5278                 if (unlikely(!p))
5279                         goto out_overflow;
5280                 sec_flavor->flavor = be32_to_cpup(p);
5281
5282                 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5283                         status = decode_secinfo_gss(xdr, sec_flavor);
5284                         if (status)
5285                                 goto out;
5286                 }
5287                 res->flavors->num_flavors++;
5288         }
5289
5290         status = 0;
5291 out:
5292         return status;
5293 out_overflow:
5294         print_overflow_msg(__func__, xdr);
5295         return -EIO;
5296 }
5297
5298 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5299 {
5300         int status = decode_op_hdr(xdr, OP_SECINFO);
5301         if (status)
5302                 return status;
5303         return decode_secinfo_common(xdr, res);
5304 }
5305
5306 #if defined(CONFIG_NFS_V4_1)
5307 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5308 {
5309         int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5310         if (status)
5311                 return status;
5312         return decode_secinfo_common(xdr, res);
5313 }
5314
5315 static int decode_exchange_id(struct xdr_stream *xdr,
5316                               struct nfs41_exchange_id_res *res)
5317 {
5318         __be32 *p;
5319         uint32_t dummy;
5320         char *dummy_str;
5321         int status;
5322         struct nfs_client *clp = res->client;
5323         uint32_t impl_id_count;
5324
5325         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5326         if (status)
5327                 return status;
5328
5329         p = xdr_inline_decode(xdr, 8);
5330         if (unlikely(!p))
5331                 goto out_overflow;
5332         xdr_decode_hyper(p, &clp->cl_clientid);
5333         p = xdr_inline_decode(xdr, 12);
5334         if (unlikely(!p))
5335                 goto out_overflow;
5336         clp->cl_seqid = be32_to_cpup(p++);
5337         clp->cl_exchange_flags = be32_to_cpup(p++);
5338
5339         /* We ask for SP4_NONE */
5340         dummy = be32_to_cpup(p);
5341         if (dummy != SP4_NONE)
5342                 return -EIO;
5343
5344         /* server_owner4.so_minor_id */
5345         p = xdr_inline_decode(xdr, 8);
5346         if (unlikely(!p))
5347                 goto out_overflow;
5348         p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5349
5350         /* server_owner4.so_major_id */
5351         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5352         if (unlikely(status))
5353                 return status;
5354         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5355                 return -EIO;
5356         memcpy(res->server_owner->major_id, dummy_str, dummy);
5357         res->server_owner->major_id_sz = dummy;
5358
5359         /* server_scope4 */
5360         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5361         if (unlikely(status))
5362                 return status;
5363         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5364                 return -EIO;
5365         memcpy(res->server_scope->server_scope, dummy_str, dummy);
5366         res->server_scope->server_scope_sz = dummy;
5367
5368         /* Implementation Id */
5369         p = xdr_inline_decode(xdr, 4);
5370         if (unlikely(!p))
5371                 goto out_overflow;
5372         impl_id_count = be32_to_cpup(p++);
5373
5374         if (impl_id_count) {
5375                 /* nii_domain */
5376                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5377                 if (unlikely(status))
5378                         return status;
5379                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5380                         return -EIO;
5381                 memcpy(res->impl_id->domain, dummy_str, dummy);
5382
5383                 /* nii_name */
5384                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5385                 if (unlikely(status))
5386                         return status;
5387                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5388                         return -EIO;
5389                 memcpy(res->impl_id->name, dummy_str, dummy);
5390
5391                 /* nii_date */
5392                 p = xdr_inline_decode(xdr, 12);
5393                 if (unlikely(!p))
5394                         goto out_overflow;
5395                 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5396                 res->impl_id->date.nseconds = be32_to_cpup(p);
5397
5398                 /* if there's more than one entry, ignore the rest */
5399         }
5400         return 0;
5401 out_overflow:
5402         print_overflow_msg(__func__, xdr);
5403         return -EIO;
5404 }
5405
5406 static int decode_chan_attrs(struct xdr_stream *xdr,
5407                              struct nfs4_channel_attrs *attrs)
5408 {
5409         __be32 *p;
5410         u32 nr_attrs, val;
5411
5412         p = xdr_inline_decode(xdr, 28);
5413         if (unlikely(!p))
5414                 goto out_overflow;
5415         val = be32_to_cpup(p++);        /* headerpadsz */
5416         if (val)
5417                 return -EINVAL;         /* no support for header padding yet */
5418         attrs->max_rqst_sz = be32_to_cpup(p++);
5419         attrs->max_resp_sz = be32_to_cpup(p++);
5420         attrs->max_resp_sz_cached = be32_to_cpup(p++);
5421         attrs->max_ops = be32_to_cpup(p++);
5422         attrs->max_reqs = be32_to_cpup(p++);
5423         nr_attrs = be32_to_cpup(p);
5424         if (unlikely(nr_attrs > 1)) {
5425                 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5426                         "count %u\n", __func__, nr_attrs);
5427                 return -EINVAL;
5428         }
5429         if (nr_attrs == 1) {
5430                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5431                 if (unlikely(!p))
5432                         goto out_overflow;
5433         }
5434         return 0;
5435 out_overflow:
5436         print_overflow_msg(__func__, xdr);
5437         return -EIO;
5438 }
5439
5440 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5441 {
5442         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5443 }
5444
5445 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5446                                 struct nfs41_bind_conn_to_session_res *res)
5447 {
5448         __be32 *p;
5449         int status;
5450
5451         status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5452         if (!status)
5453                 status = decode_sessionid(xdr, &res->session->sess_id);
5454         if (unlikely(status))
5455                 return status;
5456
5457         /* dir flags, rdma mode bool */
5458         p = xdr_inline_decode(xdr, 8);
5459         if (unlikely(!p))
5460                 goto out_overflow;
5461
5462         res->dir = be32_to_cpup(p++);
5463         if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5464                 return -EIO;
5465         if (be32_to_cpup(p) == 0)
5466                 res->use_conn_in_rdma_mode = false;
5467         else
5468                 res->use_conn_in_rdma_mode = true;
5469
5470         return 0;
5471 out_overflow:
5472         print_overflow_msg(__func__, xdr);
5473         return -EIO;
5474 }
5475
5476 static int decode_create_session(struct xdr_stream *xdr,
5477                                  struct nfs41_create_session_res *res)
5478 {
5479         __be32 *p;
5480         int status;
5481         struct nfs_client *clp = res->client;
5482         struct nfs4_session *session = clp->cl_session;
5483
5484         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5485         if (!status)
5486                 status = decode_sessionid(xdr, &session->sess_id);
5487         if (unlikely(status))
5488                 return status;
5489
5490         /* seqid, flags */
5491         p = xdr_inline_decode(xdr, 8);
5492         if (unlikely(!p))
5493                 goto out_overflow;
5494         clp->cl_seqid = be32_to_cpup(p++);
5495         session->flags = be32_to_cpup(p);
5496
5497         /* Channel attributes */
5498         status = decode_chan_attrs(xdr, &session->fc_attrs);
5499         if (!status)
5500                 status = decode_chan_attrs(xdr, &session->bc_attrs);
5501         return status;
5502 out_overflow:
5503         print_overflow_msg(__func__, xdr);
5504         return -EIO;
5505 }
5506
5507 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5508 {
5509         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5510 }
5511
5512 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5513 {
5514         return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5515 }
5516
5517 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5518 {
5519         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5520 }
5521 #endif /* CONFIG_NFS_V4_1 */
5522
5523 static int decode_sequence(struct xdr_stream *xdr,
5524                            struct nfs4_sequence_res *res,
5525                            struct rpc_rqst *rqstp)
5526 {
5527 #if defined(CONFIG_NFS_V4_1)
5528         struct nfs4_sessionid id;
5529         u32 dummy;
5530         int status;
5531         __be32 *p;
5532
5533         if (!res->sr_session)
5534                 return 0;
5535
5536         status = decode_op_hdr(xdr, OP_SEQUENCE);
5537         if (!status)
5538                 status = decode_sessionid(xdr, &id);
5539         if (unlikely(status))
5540                 goto out_err;
5541
5542         /*
5543          * If the server returns different values for sessionID, slotID or
5544          * sequence number, the server is looney tunes.
5545          */
5546         status = -EREMOTEIO;
5547
5548         if (memcmp(id.data, res->sr_session->sess_id.data,
5549                    NFS4_MAX_SESSIONID_LEN)) {
5550                 dprintk("%s Invalid session id\n", __func__);
5551                 goto out_err;
5552         }
5553
5554         p = xdr_inline_decode(xdr, 20);
5555         if (unlikely(!p))
5556                 goto out_overflow;
5557
5558         /* seqid */
5559         dummy = be32_to_cpup(p++);
5560         if (dummy != res->sr_slot->seq_nr) {
5561                 dprintk("%s Invalid sequence number\n", __func__);
5562                 goto out_err;
5563         }
5564         /* slot id */
5565         dummy = be32_to_cpup(p++);
5566         if (dummy != res->sr_slot - res->sr_session->fc_slot_table.slots) {
5567                 dprintk("%s Invalid slot id\n", __func__);
5568                 goto out_err;
5569         }
5570         /* highest slot id - currently not processed */
5571         dummy = be32_to_cpup(p++);
5572         /* target highest slot id - currently not processed */
5573         dummy = be32_to_cpup(p++);
5574         /* result flags */
5575         res->sr_status_flags = be32_to_cpup(p);
5576         status = 0;
5577 out_err:
5578         res->sr_status = status;
5579         return status;
5580 out_overflow:
5581         print_overflow_msg(__func__, xdr);
5582         status = -EIO;
5583         goto out_err;
5584 #else  /* CONFIG_NFS_V4_1 */
5585         return 0;
5586 #endif /* CONFIG_NFS_V4_1 */
5587 }
5588
5589 #if defined(CONFIG_NFS_V4_1)
5590 /*
5591  * TODO: Need to handle case when EOF != true;
5592  */
5593 static int decode_getdevicelist(struct xdr_stream *xdr,
5594                                 struct pnfs_devicelist *res)
5595 {
5596         __be32 *p;
5597         int status, i;
5598         struct nfs_writeverf verftemp;
5599
5600         status = decode_op_hdr(xdr, OP_GETDEVICELIST);
5601         if (status)
5602                 return status;
5603
5604         p = xdr_inline_decode(xdr, 8 + 8 + 4);
5605         if (unlikely(!p))
5606                 goto out_overflow;
5607
5608         /* TODO: Skip cookie for now */
5609         p += 2;
5610
5611         /* Read verifier */
5612         p = xdr_decode_opaque_fixed(p, verftemp.verifier, NFS4_VERIFIER_SIZE);
5613
5614         res->num_devs = be32_to_cpup(p);
5615
5616         dprintk("%s: num_dev %d\n", __func__, res->num_devs);
5617
5618         if (res->num_devs > NFS4_PNFS_GETDEVLIST_MAXNUM) {
5619                 printk(KERN_ERR "NFS: %s too many result dev_num %u\n",
5620                                 __func__, res->num_devs);
5621                 return -EIO;
5622         }
5623
5624         p = xdr_inline_decode(xdr,
5625                               res->num_devs * NFS4_DEVICEID4_SIZE + 4);
5626         if (unlikely(!p))
5627                 goto out_overflow;
5628         for (i = 0; i < res->num_devs; i++)
5629                 p = xdr_decode_opaque_fixed(p, res->dev_id[i].data,
5630                                             NFS4_DEVICEID4_SIZE);
5631         res->eof = be32_to_cpup(p);
5632         return 0;
5633 out_overflow:
5634         print_overflow_msg(__func__, xdr);
5635         return -EIO;
5636 }
5637
5638 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5639                                 struct pnfs_device *pdev)
5640 {
5641         __be32 *p;
5642         uint32_t len, type;
5643         int status;
5644
5645         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5646         if (status) {
5647                 if (status == -ETOOSMALL) {
5648                         p = xdr_inline_decode(xdr, 4);
5649                         if (unlikely(!p))
5650                                 goto out_overflow;
5651                         pdev->mincount = be32_to_cpup(p);
5652                         dprintk("%s: Min count too small. mincnt = %u\n",
5653                                 __func__, pdev->mincount);
5654                 }
5655                 return status;
5656         }
5657
5658         p = xdr_inline_decode(xdr, 8);
5659         if (unlikely(!p))
5660                 goto out_overflow;
5661         type = be32_to_cpup(p++);
5662         if (type != pdev->layout_type) {
5663                 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5664                         __func__, pdev->layout_type, type);
5665                 return -EINVAL;
5666         }
5667         /*
5668          * Get the length of the opaque device_addr4. xdr_read_pages places
5669          * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5670          * and places the remaining xdr data in xdr_buf->tail
5671          */
5672         pdev->mincount = be32_to_cpup(p);
5673         xdr_read_pages(xdr, pdev->mincount); /* include space for the length */
5674
5675         /* Parse notification bitmap, verifying that it is zero. */
5676         p = xdr_inline_decode(xdr, 4);
5677         if (unlikely(!p))
5678                 goto out_overflow;
5679         len = be32_to_cpup(p);
5680         if (len) {
5681                 uint32_t i;
5682
5683                 p = xdr_inline_decode(xdr, 4 * len);
5684                 if (unlikely(!p))
5685                         goto out_overflow;
5686                 for (i = 0; i < len; i++, p++) {
5687                         if (be32_to_cpup(p)) {
5688                                 dprintk("%s: notifications not supported\n",
5689                                         __func__);
5690                                 return -EIO;
5691                         }
5692                 }
5693         }
5694         return 0;
5695 out_overflow:
5696         print_overflow_msg(__func__, xdr);
5697         return -EIO;
5698 }
5699
5700 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5701                             struct nfs4_layoutget_res *res)
5702 {
5703         __be32 *p;
5704         int status;
5705         u32 layout_count;
5706         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5707         struct kvec *iov = rcvbuf->head;
5708         u32 hdrlen, recvd;
5709
5710         status = decode_op_hdr(xdr, OP_LAYOUTGET);
5711         if (status)
5712                 return status;
5713         p = xdr_inline_decode(xdr, 4);
5714         if (unlikely(!p))
5715                 goto out_overflow;
5716         res->return_on_close = be32_to_cpup(p);
5717         decode_stateid(xdr, &res->stateid);
5718         p = xdr_inline_decode(xdr, 4);
5719         if (unlikely(!p))
5720                 goto out_overflow;
5721         layout_count = be32_to_cpup(p);
5722         if (!layout_count) {
5723                 dprintk("%s: server responded with empty layout array\n",
5724                         __func__);
5725                 return -EINVAL;
5726         }
5727
5728         p = xdr_inline_decode(xdr, 28);
5729         if (unlikely(!p))
5730                 goto out_overflow;
5731         p = xdr_decode_hyper(p, &res->range.offset);
5732         p = xdr_decode_hyper(p, &res->range.length);
5733         res->range.iomode = be32_to_cpup(p++);
5734         res->type = be32_to_cpup(p++);
5735         res->layoutp->len = be32_to_cpup(p);
5736
5737         dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5738                 __func__,
5739                 (unsigned long)res->range.offset,
5740                 (unsigned long)res->range.length,
5741                 res->range.iomode,
5742                 res->type,
5743                 res->layoutp->len);
5744
5745         hdrlen = (u8 *) xdr->p - (u8 *) iov->iov_base;
5746         recvd = req->rq_rcv_buf.len - hdrlen;
5747         if (res->layoutp->len > recvd) {
5748                 dprintk("NFS: server cheating in layoutget reply: "
5749                                 "layout len %u > recvd %u\n",
5750                                 res->layoutp->len, recvd);
5751                 return -EINVAL;
5752         }
5753
5754         xdr_read_pages(xdr, res->layoutp->len);
5755
5756         if (layout_count > 1) {
5757                 /* We only handle a length one array at the moment.  Any
5758                  * further entries are just ignored.  Note that this means
5759                  * the client may see a response that is less than the
5760                  * minimum it requested.
5761                  */
5762                 dprintk("%s: server responded with %d layouts, dropping tail\n",
5763                         __func__, layout_count);
5764         }
5765
5766         return 0;
5767 out_overflow:
5768         print_overflow_msg(__func__, xdr);
5769         return -EIO;
5770 }
5771
5772 static int decode_layoutreturn(struct xdr_stream *xdr,
5773                                struct nfs4_layoutreturn_res *res)
5774 {
5775         __be32 *p;
5776         int status;
5777
5778         status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5779         if (status)
5780                 return status;
5781         p = xdr_inline_decode(xdr, 4);
5782         if (unlikely(!p))
5783                 goto out_overflow;
5784         res->lrs_present = be32_to_cpup(p);
5785         if (res->lrs_present)
5786                 status = decode_stateid(xdr, &res->stateid);
5787         return status;
5788 out_overflow:
5789         print_overflow_msg(__func__, xdr);
5790         return -EIO;
5791 }
5792
5793 static int decode_layoutcommit(struct xdr_stream *xdr,
5794                                struct rpc_rqst *req,
5795                                struct nfs4_layoutcommit_res *res)
5796 {
5797         __be32 *p;
5798         __u32 sizechanged;
5799         int status;
5800
5801         status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5802         res->status = status;
5803         if (status)
5804                 return status;
5805
5806         p = xdr_inline_decode(xdr, 4);
5807         if (unlikely(!p))
5808                 goto out_overflow;
5809         sizechanged = be32_to_cpup(p);
5810
5811         if (sizechanged) {
5812                 /* throw away new size */
5813                 p = xdr_inline_decode(xdr, 8);
5814                 if (unlikely(!p))
5815                         goto out_overflow;
5816         }
5817         return 0;
5818 out_overflow:
5819         print_overflow_msg(__func__, xdr);
5820         return -EIO;
5821 }
5822
5823 static int decode_test_stateid(struct xdr_stream *xdr,
5824                                struct nfs41_test_stateid_res *res)
5825 {
5826         __be32 *p;
5827         int status;
5828         int num_res;
5829
5830         status = decode_op_hdr(xdr, OP_TEST_STATEID);
5831         if (status)
5832                 return status;
5833
5834         p = xdr_inline_decode(xdr, 4);
5835         if (unlikely(!p))
5836                 goto out_overflow;
5837         num_res = be32_to_cpup(p++);
5838         if (num_res != 1)
5839                 goto out;
5840
5841         p = xdr_inline_decode(xdr, 4);
5842         if (unlikely(!p))
5843                 goto out_overflow;
5844         res->status = be32_to_cpup(p++);
5845
5846         return status;
5847 out_overflow:
5848         print_overflow_msg(__func__, xdr);
5849 out:
5850         return -EIO;
5851 }
5852
5853 static int decode_free_stateid(struct xdr_stream *xdr,
5854                                struct nfs41_free_stateid_res *res)
5855 {
5856         __be32 *p;
5857         int status;
5858
5859         status = decode_op_hdr(xdr, OP_FREE_STATEID);
5860         if (status)
5861                 return status;
5862
5863         p = xdr_inline_decode(xdr, 4);
5864         if (unlikely(!p))
5865                 goto out_overflow;
5866         res->status = be32_to_cpup(p++);
5867         return res->status;
5868 out_overflow:
5869         print_overflow_msg(__func__, xdr);
5870         return -EIO;
5871 }
5872 #endif /* CONFIG_NFS_V4_1 */
5873
5874 /*
5875  * END OF "GENERIC" DECODE ROUTINES.
5876  */
5877
5878 /*
5879  * Decode OPEN_DOWNGRADE response
5880  */
5881 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
5882                                        struct xdr_stream *xdr,
5883                                        struct nfs_closeres *res)
5884 {
5885         struct compound_hdr hdr;
5886         int status;
5887
5888         status = decode_compound_hdr(xdr, &hdr);
5889         if (status)
5890                 goto out;
5891         status = decode_sequence(xdr, &res->seq_res, rqstp);
5892         if (status)
5893                 goto out;
5894         status = decode_putfh(xdr);
5895         if (status)
5896                 goto out;
5897         status = decode_open_downgrade(xdr, res);
5898         if (status != 0)
5899                 goto out;
5900         decode_getfattr(xdr, res->fattr, res->server);
5901 out:
5902         return status;
5903 }
5904
5905 /*
5906  * Decode ACCESS response
5907  */
5908 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5909                                struct nfs4_accessres *res)
5910 {
5911         struct compound_hdr hdr;
5912         int status;
5913
5914         status = decode_compound_hdr(xdr, &hdr);
5915         if (status)
5916                 goto out;
5917         status = decode_sequence(xdr, &res->seq_res, rqstp);
5918         if (status)
5919                 goto out;
5920         status = decode_putfh(xdr);
5921         if (status != 0)
5922                 goto out;
5923         status = decode_access(xdr, res);
5924         if (status != 0)
5925                 goto out;
5926         decode_getfattr(xdr, res->fattr, res->server);
5927 out:
5928         return status;
5929 }
5930
5931 /*
5932  * Decode LOOKUP response
5933  */
5934 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5935                                struct nfs4_lookup_res *res)
5936 {
5937         struct compound_hdr hdr;
5938         int status;
5939
5940         status = decode_compound_hdr(xdr, &hdr);
5941         if (status)
5942                 goto out;
5943         status = decode_sequence(xdr, &res->seq_res, rqstp);
5944         if (status)
5945                 goto out;
5946         status = decode_putfh(xdr);
5947         if (status)
5948                 goto out;
5949         status = decode_lookup(xdr);
5950         if (status)
5951                 goto out;
5952         status = decode_getfh(xdr, res->fh);
5953         if (status)
5954                 goto out;
5955         status = decode_getfattr(xdr, res->fattr, res->server);
5956 out:
5957         return status;
5958 }
5959
5960 /*
5961  * Decode LOOKUP_ROOT response
5962  */
5963 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
5964                                     struct xdr_stream *xdr,
5965                                     struct nfs4_lookup_res *res)
5966 {
5967         struct compound_hdr hdr;
5968         int status;
5969
5970         status = decode_compound_hdr(xdr, &hdr);
5971         if (status)
5972                 goto out;
5973         status = decode_sequence(xdr, &res->seq_res, rqstp);
5974         if (status)
5975                 goto out;
5976         status = decode_putrootfh(xdr);
5977         if (status)
5978                 goto out;
5979         status = decode_getfh(xdr, res->fh);
5980         if (status == 0)
5981                 status = decode_getfattr(xdr, res->fattr, res->server);
5982 out:
5983         return status;
5984 }
5985
5986 /*
5987  * Decode REMOVE response
5988  */
5989 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5990                                struct nfs_removeres *res)
5991 {
5992         struct compound_hdr hdr;
5993         int status;
5994
5995         status = decode_compound_hdr(xdr, &hdr);
5996         if (status)
5997                 goto out;
5998         status = decode_sequence(xdr, &res->seq_res, rqstp);
5999         if (status)
6000                 goto out;
6001         status = decode_putfh(xdr);
6002         if (status)
6003                 goto out;
6004         status = decode_remove(xdr, &res->cinfo);
6005 out:
6006         return status;
6007 }
6008
6009 /*
6010  * Decode RENAME response
6011  */
6012 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6013                                struct nfs_renameres *res)
6014 {
6015         struct compound_hdr hdr;
6016         int status;
6017
6018         status = decode_compound_hdr(xdr, &hdr);
6019         if (status)
6020                 goto out;
6021         status = decode_sequence(xdr, &res->seq_res, rqstp);
6022         if (status)
6023                 goto out;
6024         status = decode_putfh(xdr);
6025         if (status)
6026                 goto out;
6027         status = decode_savefh(xdr);
6028         if (status)
6029                 goto out;
6030         status = decode_putfh(xdr);
6031         if (status)
6032                 goto out;
6033         status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6034 out:
6035         return status;
6036 }
6037
6038 /*
6039  * Decode LINK response
6040  */
6041 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6042                              struct nfs4_link_res *res)
6043 {
6044         struct compound_hdr hdr;
6045         int status;
6046
6047         status = decode_compound_hdr(xdr, &hdr);
6048         if (status)
6049                 goto out;
6050         status = decode_sequence(xdr, &res->seq_res, rqstp);
6051         if (status)
6052                 goto out;
6053         status = decode_putfh(xdr);
6054         if (status)
6055                 goto out;
6056         status = decode_savefh(xdr);
6057         if (status)
6058                 goto out;
6059         status = decode_putfh(xdr);
6060         if (status)
6061                 goto out;
6062         status = decode_link(xdr, &res->cinfo);
6063         if (status)
6064                 goto out;
6065         /*
6066          * Note order: OP_LINK leaves the directory as the current
6067          *             filehandle.
6068          */
6069         status = decode_restorefh(xdr);
6070         if (status)
6071                 goto out;
6072         decode_getfattr(xdr, res->fattr, res->server);
6073 out:
6074         return status;
6075 }
6076
6077 /*
6078  * Decode CREATE response
6079  */
6080 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6081                                struct nfs4_create_res *res)
6082 {
6083         struct compound_hdr hdr;
6084         int status;
6085
6086         status = decode_compound_hdr(xdr, &hdr);
6087         if (status)
6088                 goto out;
6089         status = decode_sequence(xdr, &res->seq_res, rqstp);
6090         if (status)
6091                 goto out;
6092         status = decode_putfh(xdr);
6093         if (status)
6094                 goto out;
6095         status = decode_create(xdr, &res->dir_cinfo);
6096         if (status)
6097                 goto out;
6098         status = decode_getfh(xdr, res->fh);
6099         if (status)
6100                 goto out;
6101         decode_getfattr(xdr, res->fattr, res->server);
6102 out:
6103         return status;
6104 }
6105
6106 /*
6107  * Decode SYMLINK response
6108  */
6109 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6110                                 struct nfs4_create_res *res)
6111 {
6112         return nfs4_xdr_dec_create(rqstp, xdr, res);
6113 }
6114
6115 /*
6116  * Decode GETATTR response
6117  */
6118 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6119                                 struct nfs4_getattr_res *res)
6120 {
6121         struct compound_hdr hdr;
6122         int status;
6123
6124         status = decode_compound_hdr(xdr, &hdr);
6125         if (status)
6126                 goto out;
6127         status = decode_sequence(xdr, &res->seq_res, rqstp);
6128         if (status)
6129                 goto out;
6130         status = decode_putfh(xdr);
6131         if (status)
6132                 goto out;
6133         status = decode_getfattr(xdr, res->fattr, res->server);
6134 out:
6135         return status;
6136 }
6137
6138 /*
6139  * Encode an SETACL request
6140  */
6141 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6142                                 struct nfs_setaclargs *args)
6143 {
6144         struct compound_hdr hdr = {
6145                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6146         };
6147
6148         encode_compound_hdr(xdr, req, &hdr);
6149         encode_sequence(xdr, &args->seq_args, &hdr);
6150         encode_putfh(xdr, args->fh, &hdr);
6151         encode_setacl(xdr, args, &hdr);
6152         encode_nops(&hdr);
6153 }
6154
6155 /*
6156  * Decode SETACL response
6157  */
6158 static int
6159 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6160                     struct nfs_setaclres *res)
6161 {
6162         struct compound_hdr hdr;
6163         int status;
6164
6165         status = decode_compound_hdr(xdr, &hdr);
6166         if (status)
6167                 goto out;
6168         status = decode_sequence(xdr, &res->seq_res, rqstp);
6169         if (status)
6170                 goto out;
6171         status = decode_putfh(xdr);
6172         if (status)
6173                 goto out;
6174         status = decode_setattr(xdr);
6175 out:
6176         return status;
6177 }
6178
6179 /*
6180  * Decode GETACL response
6181  */
6182 static int
6183 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6184                     struct nfs_getaclres *res)
6185 {
6186         struct compound_hdr hdr;
6187         int status;
6188
6189         if (res->acl_scratch != NULL) {
6190                 void *p = page_address(res->acl_scratch);
6191                 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6192         }
6193         status = decode_compound_hdr(xdr, &hdr);
6194         if (status)
6195                 goto out;
6196         status = decode_sequence(xdr, &res->seq_res, rqstp);
6197         if (status)
6198                 goto out;
6199         status = decode_putfh(xdr);
6200         if (status)
6201                 goto out;
6202         status = decode_getacl(xdr, rqstp, res);
6203
6204 out:
6205         return status;
6206 }
6207
6208 /*
6209  * Decode CLOSE response
6210  */
6211 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6212                               struct nfs_closeres *res)
6213 {
6214         struct compound_hdr hdr;
6215         int status;
6216
6217         status = decode_compound_hdr(xdr, &hdr);
6218         if (status)
6219                 goto out;
6220         status = decode_sequence(xdr, &res->seq_res, rqstp);
6221         if (status)
6222                 goto out;
6223         status = decode_putfh(xdr);
6224         if (status)
6225                 goto out;
6226         status = decode_close(xdr, res);
6227         if (status != 0)
6228                 goto out;
6229         /*
6230          * Note: Server may do delete on close for this file
6231          *      in which case the getattr call will fail with
6232          *      an ESTALE error. Shouldn't be a problem,
6233          *      though, since fattr->valid will remain unset.
6234          */
6235         decode_getfattr(xdr, res->fattr, res->server);
6236 out:
6237         return status;
6238 }
6239
6240 /*
6241  * Decode OPEN response
6242  */
6243 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6244                              struct nfs_openres *res)
6245 {
6246         struct compound_hdr hdr;
6247         int status;
6248
6249         status = decode_compound_hdr(xdr, &hdr);
6250         if (status)
6251                 goto out;
6252         status = decode_sequence(xdr, &res->seq_res, rqstp);
6253         if (status)
6254                 goto out;
6255         status = decode_putfh(xdr);
6256         if (status)
6257                 goto out;
6258         status = decode_open(xdr, res);
6259         if (status)
6260                 goto out;
6261         if (decode_getfh(xdr, &res->fh) != 0)
6262                 goto out;
6263         decode_getfattr(xdr, res->f_attr, res->server);
6264 out:
6265         return status;
6266 }
6267
6268 /*
6269  * Decode OPEN_CONFIRM response
6270  */
6271 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6272                                      struct xdr_stream *xdr,
6273                                      struct nfs_open_confirmres *res)
6274 {
6275         struct compound_hdr hdr;
6276         int status;
6277
6278         status = decode_compound_hdr(xdr, &hdr);
6279         if (status)
6280                 goto out;
6281         status = decode_putfh(xdr);
6282         if (status)
6283                 goto out;
6284         status = decode_open_confirm(xdr, res);
6285 out:
6286         return status;
6287 }
6288
6289 /*
6290  * Decode OPEN response
6291  */
6292 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6293                                     struct xdr_stream *xdr,
6294                                     struct nfs_openres *res)
6295 {
6296         struct compound_hdr hdr;
6297         int status;
6298
6299         status = decode_compound_hdr(xdr, &hdr);
6300         if (status)
6301                 goto out;
6302         status = decode_sequence(xdr, &res->seq_res, rqstp);
6303         if (status)
6304                 goto out;
6305         status = decode_putfh(xdr);
6306         if (status)
6307                 goto out;
6308         status = decode_open(xdr, res);
6309         if (status)
6310                 goto out;
6311         decode_getfattr(xdr, res->f_attr, res->server);
6312 out:
6313         return status;
6314 }
6315
6316 /*
6317  * Decode SETATTR response
6318  */
6319 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6320                                 struct xdr_stream *xdr,
6321                                 struct nfs_setattrres *res)
6322 {
6323         struct compound_hdr hdr;
6324         int status;
6325
6326         status = decode_compound_hdr(xdr, &hdr);
6327         if (status)
6328                 goto out;
6329         status = decode_sequence(xdr, &res->seq_res, rqstp);
6330         if (status)
6331                 goto out;
6332         status = decode_putfh(xdr);
6333         if (status)
6334                 goto out;
6335         status = decode_setattr(xdr);
6336         if (status)
6337                 goto out;
6338         decode_getfattr(xdr, res->fattr, res->server);
6339 out:
6340         return status;
6341 }
6342
6343 /*
6344  * Decode LOCK response
6345  */
6346 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6347                              struct nfs_lock_res *res)
6348 {
6349         struct compound_hdr hdr;
6350         int status;
6351
6352         status = decode_compound_hdr(xdr, &hdr);
6353         if (status)
6354                 goto out;
6355         status = decode_sequence(xdr, &res->seq_res, rqstp);
6356         if (status)
6357                 goto out;
6358         status = decode_putfh(xdr);
6359         if (status)
6360                 goto out;
6361         status = decode_lock(xdr, res);
6362 out:
6363         return status;
6364 }
6365
6366 /*
6367  * Decode LOCKT response
6368  */
6369 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6370                               struct nfs_lockt_res *res)
6371 {
6372         struct compound_hdr hdr;
6373         int status;
6374
6375         status = decode_compound_hdr(xdr, &hdr);
6376         if (status)
6377                 goto out;
6378         status = decode_sequence(xdr, &res->seq_res, rqstp);
6379         if (status)
6380                 goto out;
6381         status = decode_putfh(xdr);
6382         if (status)
6383                 goto out;
6384         status = decode_lockt(xdr, res);
6385 out:
6386         return status;
6387 }
6388
6389 /*
6390  * Decode LOCKU response
6391  */
6392 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6393                               struct nfs_locku_res *res)
6394 {
6395         struct compound_hdr hdr;
6396         int status;
6397
6398         status = decode_compound_hdr(xdr, &hdr);
6399         if (status)
6400                 goto out;
6401         status = decode_sequence(xdr, &res->seq_res, rqstp);
6402         if (status)
6403                 goto out;
6404         status = decode_putfh(xdr);
6405         if (status)
6406                 goto out;
6407         status = decode_locku(xdr, res);
6408 out:
6409         return status;
6410 }
6411
6412 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6413                                           struct xdr_stream *xdr, void *dummy)
6414 {
6415         struct compound_hdr hdr;
6416         int status;
6417
6418         status = decode_compound_hdr(xdr, &hdr);
6419         if (!status)
6420                 status = decode_release_lockowner(xdr);
6421         return status;
6422 }
6423
6424 /*
6425  * Decode READLINK response
6426  */
6427 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6428                                  struct xdr_stream *xdr,
6429                                  struct nfs4_readlink_res *res)
6430 {
6431         struct compound_hdr hdr;
6432         int status;
6433
6434         status = decode_compound_hdr(xdr, &hdr);
6435         if (status)
6436                 goto out;
6437         status = decode_sequence(xdr, &res->seq_res, rqstp);
6438         if (status)
6439                 goto out;
6440         status = decode_putfh(xdr);
6441         if (status)
6442                 goto out;
6443         status = decode_readlink(xdr, rqstp);
6444 out:
6445         return status;
6446 }
6447
6448 /*
6449  * Decode READDIR response
6450  */
6451 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6452                                 struct nfs4_readdir_res *res)
6453 {
6454         struct compound_hdr hdr;
6455         int status;
6456
6457         status = decode_compound_hdr(xdr, &hdr);
6458         if (status)
6459                 goto out;
6460         status = decode_sequence(xdr, &res->seq_res, rqstp);
6461         if (status)
6462                 goto out;
6463         status = decode_putfh(xdr);
6464         if (status)
6465                 goto out;
6466         status = decode_readdir(xdr, rqstp, res);
6467 out:
6468         return status;
6469 }
6470
6471 /*
6472  * Decode Read response
6473  */
6474 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6475                              struct nfs_readres *res)
6476 {
6477         struct compound_hdr hdr;
6478         int status;
6479
6480         status = decode_compound_hdr(xdr, &hdr);
6481         if (status)
6482                 goto out;
6483         status = decode_sequence(xdr, &res->seq_res, rqstp);
6484         if (status)
6485                 goto out;
6486         status = decode_putfh(xdr);
6487         if (status)
6488                 goto out;
6489         status = decode_read(xdr, rqstp, res);
6490         if (!status)
6491                 status = res->count;
6492 out:
6493         return status;
6494 }
6495
6496 /*
6497  * Decode WRITE response
6498  */
6499 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6500                               struct nfs_writeres *res)
6501 {
6502         struct compound_hdr hdr;
6503         int status;
6504
6505         status = decode_compound_hdr(xdr, &hdr);
6506         if (status)
6507                 goto out;
6508         status = decode_sequence(xdr, &res->seq_res, rqstp);
6509         if (status)
6510                 goto out;
6511         status = decode_putfh(xdr);
6512         if (status)
6513                 goto out;
6514         status = decode_write(xdr, res);
6515         if (status)
6516                 goto out;
6517         if (res->fattr)
6518                 decode_getfattr(xdr, res->fattr, res->server);
6519         if (!status)
6520                 status = res->count;
6521 out:
6522         return status;
6523 }
6524
6525 /*
6526  * Decode COMMIT response
6527  */
6528 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6529                                struct nfs_commitres *res)
6530 {
6531         struct compound_hdr hdr;
6532         int status;
6533
6534         status = decode_compound_hdr(xdr, &hdr);
6535         if (status)
6536                 goto out;
6537         status = decode_sequence(xdr, &res->seq_res, rqstp);
6538         if (status)
6539                 goto out;
6540         status = decode_putfh(xdr);
6541         if (status)
6542                 goto out;
6543         status = decode_commit(xdr, res);
6544 out:
6545         return status;
6546 }
6547
6548 /*
6549  * Decode FSINFO response
6550  */
6551 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6552                                struct nfs4_fsinfo_res *res)
6553 {
6554         struct compound_hdr hdr;
6555         int status;
6556
6557         status = decode_compound_hdr(xdr, &hdr);
6558         if (!status)
6559                 status = decode_sequence(xdr, &res->seq_res, req);
6560         if (!status)
6561                 status = decode_putfh(xdr);
6562         if (!status)
6563                 status = decode_fsinfo(xdr, res->fsinfo);
6564         return status;
6565 }
6566
6567 /*
6568  * Decode PATHCONF response
6569  */
6570 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6571                                  struct nfs4_pathconf_res *res)
6572 {
6573         struct compound_hdr hdr;
6574         int status;
6575
6576         status = decode_compound_hdr(xdr, &hdr);
6577         if (!status)
6578                 status = decode_sequence(xdr, &res->seq_res, req);
6579         if (!status)
6580                 status = decode_putfh(xdr);
6581         if (!status)
6582                 status = decode_pathconf(xdr, res->pathconf);
6583         return status;
6584 }
6585
6586 /*
6587  * Decode STATFS response
6588  */
6589 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6590                                struct nfs4_statfs_res *res)
6591 {
6592         struct compound_hdr hdr;
6593         int status;
6594
6595         status = decode_compound_hdr(xdr, &hdr);
6596         if (!status)
6597                 status = decode_sequence(xdr, &res->seq_res, req);
6598         if (!status)
6599                 status = decode_putfh(xdr);
6600         if (!status)
6601                 status = decode_statfs(xdr, res->fsstat);
6602         return status;
6603 }
6604
6605 /*
6606  * Decode GETATTR_BITMAP response
6607  */
6608 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6609                                     struct xdr_stream *xdr,
6610                                     struct nfs4_server_caps_res *res)
6611 {
6612         struct compound_hdr hdr;
6613         int status;
6614
6615         status = decode_compound_hdr(xdr, &hdr);
6616         if (status)
6617                 goto out;
6618         status = decode_sequence(xdr, &res->seq_res, req);
6619         if (status)
6620                 goto out;
6621         status = decode_putfh(xdr);
6622         if (status)
6623                 goto out;
6624         status = decode_server_caps(xdr, res);
6625 out:
6626         return status;
6627 }
6628
6629 /*
6630  * Decode RENEW response
6631  */
6632 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6633                               void *__unused)
6634 {
6635         struct compound_hdr hdr;
6636         int status;
6637
6638         status = decode_compound_hdr(xdr, &hdr);
6639         if (!status)
6640                 status = decode_renew(xdr);
6641         return status;
6642 }
6643
6644 /*
6645  * Decode SETCLIENTID response
6646  */
6647 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6648                                     struct xdr_stream *xdr,
6649                                     struct nfs4_setclientid_res *res)
6650 {
6651         struct compound_hdr hdr;
6652         int status;
6653
6654         status = decode_compound_hdr(xdr, &hdr);
6655         if (!status)
6656                 status = decode_setclientid(xdr, res);
6657         return status;
6658 }
6659
6660 /*
6661  * Decode SETCLIENTID_CONFIRM response
6662  */
6663 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6664                                             struct xdr_stream *xdr,
6665                                             struct nfs_fsinfo *fsinfo)
6666 {
6667         struct compound_hdr hdr;
6668         int status;
6669
6670         status = decode_compound_hdr(xdr, &hdr);
6671         if (!status)
6672                 status = decode_setclientid_confirm(xdr);
6673         if (!status)
6674                 status = decode_putrootfh(xdr);
6675         if (!status)
6676                 status = decode_fsinfo(xdr, fsinfo);
6677         return status;
6678 }
6679
6680 /*
6681  * Decode DELEGRETURN response
6682  */
6683 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6684                                     struct xdr_stream *xdr,
6685                                     struct nfs4_delegreturnres *res)
6686 {
6687         struct compound_hdr hdr;
6688         int status;
6689
6690         status = decode_compound_hdr(xdr, &hdr);
6691         if (status)
6692                 goto out;
6693         status = decode_sequence(xdr, &res->seq_res, rqstp);
6694         if (status)
6695                 goto out;
6696         status = decode_putfh(xdr);
6697         if (status != 0)
6698                 goto out;
6699         status = decode_getfattr(xdr, res->fattr, res->server);
6700         if (status != 0)
6701                 goto out;
6702         status = decode_delegreturn(xdr);
6703 out:
6704         return status;
6705 }
6706
6707 /*
6708  * Decode FS_LOCATIONS response
6709  */
6710 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6711                                      struct xdr_stream *xdr,
6712                                      struct nfs4_fs_locations_res *res)
6713 {
6714         struct compound_hdr hdr;
6715         int status;
6716
6717         status = decode_compound_hdr(xdr, &hdr);
6718         if (status)
6719                 goto out;
6720         status = decode_sequence(xdr, &res->seq_res, req);
6721         if (status)
6722                 goto out;
6723         status = decode_putfh(xdr);
6724         if (status)
6725                 goto out;
6726         status = decode_lookup(xdr);
6727         if (status)
6728                 goto out;
6729         xdr_enter_page(xdr, PAGE_SIZE);
6730         status = decode_getfattr_generic(xdr, &res->fs_locations->fattr,
6731                                          NULL, res->fs_locations,
6732                                          res->fs_locations->server);
6733 out:
6734         return status;
6735 }
6736
6737 /*
6738  * Decode SECINFO response
6739  */
6740 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6741                                 struct xdr_stream *xdr,
6742                                 struct nfs4_secinfo_res *res)
6743 {
6744         struct compound_hdr hdr;
6745         int status;
6746
6747         status = decode_compound_hdr(xdr, &hdr);
6748         if (status)
6749                 goto out;
6750         status = decode_sequence(xdr, &res->seq_res, rqstp);
6751         if (status)
6752                 goto out;
6753         status = decode_putfh(xdr);
6754         if (status)
6755                 goto out;
6756         status = decode_secinfo(xdr, res);
6757 out:
6758         return status;
6759 }
6760
6761 #if defined(CONFIG_NFS_V4_1)
6762 /*
6763  * Decode BIND_CONN_TO_SESSION response
6764  */
6765 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
6766                                         struct xdr_stream *xdr,
6767                                         void *res)
6768 {
6769         struct compound_hdr hdr;
6770         int status;
6771
6772         status = decode_compound_hdr(xdr, &hdr);
6773         if (!status)
6774                 status = decode_bind_conn_to_session(xdr, res);
6775         return status;
6776 }
6777
6778 /*
6779  * Decode EXCHANGE_ID response
6780  */
6781 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
6782                                     struct xdr_stream *xdr,
6783                                     void *res)
6784 {
6785         struct compound_hdr hdr;
6786         int status;
6787
6788         status = decode_compound_hdr(xdr, &hdr);
6789         if (!status)
6790                 status = decode_exchange_id(xdr, res);
6791         return status;
6792 }
6793
6794 /*
6795  * Decode CREATE_SESSION response
6796  */
6797 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
6798                                        struct xdr_stream *xdr,
6799                                        struct nfs41_create_session_res *res)
6800 {
6801         struct compound_hdr hdr;
6802         int status;
6803
6804         status = decode_compound_hdr(xdr, &hdr);
6805         if (!status)
6806                 status = decode_create_session(xdr, res);
6807         return status;
6808 }
6809
6810 /*
6811  * Decode DESTROY_SESSION response
6812  */
6813 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
6814                                         struct xdr_stream *xdr,
6815                                         void *res)
6816 {
6817         struct compound_hdr hdr;
6818         int status;
6819
6820         status = decode_compound_hdr(xdr, &hdr);
6821         if (!status)
6822                 status = decode_destroy_session(xdr, res);
6823         return status;
6824 }
6825
6826 /*
6827  * Decode DESTROY_CLIENTID response
6828  */
6829 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
6830                                         struct xdr_stream *xdr,
6831                                         void *res)
6832 {
6833         struct compound_hdr hdr;
6834         int status;
6835
6836         status = decode_compound_hdr(xdr, &hdr);
6837         if (!status)
6838                 status = decode_destroy_clientid(xdr, res);
6839         return status;
6840 }
6841
6842 /*
6843  * Decode SEQUENCE response
6844  */
6845 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
6846                                  struct xdr_stream *xdr,
6847                                  struct nfs4_sequence_res *res)
6848 {
6849         struct compound_hdr hdr;
6850         int status;
6851
6852         status = decode_compound_hdr(xdr, &hdr);
6853         if (!status)
6854                 status = decode_sequence(xdr, res, rqstp);
6855         return status;
6856 }
6857
6858 /*
6859  * Decode GET_LEASE_TIME response
6860  */
6861 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
6862                                        struct xdr_stream *xdr,
6863                                        struct nfs4_get_lease_time_res *res)
6864 {
6865         struct compound_hdr hdr;
6866         int status;
6867
6868         status = decode_compound_hdr(xdr, &hdr);
6869         if (!status)
6870                 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
6871         if (!status)
6872                 status = decode_putrootfh(xdr);
6873         if (!status)
6874                 status = decode_fsinfo(xdr, res->lr_fsinfo);
6875         return status;
6876 }
6877
6878 /*
6879  * Decode RECLAIM_COMPLETE response
6880  */
6881 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
6882                                          struct xdr_stream *xdr,
6883                                          struct nfs41_reclaim_complete_res *res)
6884 {
6885         struct compound_hdr hdr;
6886         int status;
6887
6888         status = decode_compound_hdr(xdr, &hdr);
6889         if (!status)
6890                 status = decode_sequence(xdr, &res->seq_res, rqstp);
6891         if (!status)
6892                 status = decode_reclaim_complete(xdr, (void *)NULL);
6893         return status;
6894 }
6895
6896 /*
6897  * Decode GETDEVICELIST response
6898  */
6899 static int nfs4_xdr_dec_getdevicelist(struct rpc_rqst *rqstp,
6900                                       struct xdr_stream *xdr,
6901                                       struct nfs4_getdevicelist_res *res)
6902 {
6903         struct compound_hdr hdr;
6904         int status;
6905
6906         dprintk("encoding getdevicelist!\n");
6907
6908         status = decode_compound_hdr(xdr, &hdr);
6909         if (status != 0)
6910                 goto out;
6911         status = decode_sequence(xdr, &res->seq_res, rqstp);
6912         if (status != 0)
6913                 goto out;
6914         status = decode_putfh(xdr);
6915         if (status != 0)
6916                 goto out;
6917         status = decode_getdevicelist(xdr, res->devlist);
6918 out:
6919         return status;
6920 }
6921
6922 /*
6923  * Decode GETDEVINFO response
6924  */
6925 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
6926                                       struct xdr_stream *xdr,
6927                                       struct nfs4_getdeviceinfo_res *res)
6928 {
6929         struct compound_hdr hdr;
6930         int status;
6931
6932         status = decode_compound_hdr(xdr, &hdr);
6933         if (status != 0)
6934                 goto out;
6935         status = decode_sequence(xdr, &res->seq_res, rqstp);
6936         if (status != 0)
6937                 goto out;
6938         status = decode_getdeviceinfo(xdr, res->pdev);
6939 out:
6940         return status;
6941 }
6942
6943 /*
6944  * Decode LAYOUTGET response
6945  */
6946 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
6947                                   struct xdr_stream *xdr,
6948                                   struct nfs4_layoutget_res *res)
6949 {
6950         struct compound_hdr hdr;
6951         int status;
6952
6953         status = decode_compound_hdr(xdr, &hdr);
6954         if (status)
6955                 goto out;
6956         status = decode_sequence(xdr, &res->seq_res, rqstp);
6957         if (status)
6958                 goto out;
6959         status = decode_putfh(xdr);
6960         if (status)
6961                 goto out;
6962         status = decode_layoutget(xdr, rqstp, res);
6963 out:
6964         return status;
6965 }
6966
6967 /*
6968  * Decode LAYOUTRETURN response
6969  */
6970 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
6971                                      struct xdr_stream *xdr,
6972                                      struct nfs4_layoutreturn_res *res)
6973 {
6974         struct compound_hdr hdr;
6975         int status;
6976
6977         status = decode_compound_hdr(xdr, &hdr);
6978         if (status)
6979                 goto out;
6980         status = decode_sequence(xdr, &res->seq_res, rqstp);
6981         if (status)
6982                 goto out;
6983         status = decode_putfh(xdr);
6984         if (status)
6985                 goto out;
6986         status = decode_layoutreturn(xdr, res);
6987 out:
6988         return status;
6989 }
6990
6991 /*
6992  * Decode LAYOUTCOMMIT response
6993  */
6994 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
6995                                      struct xdr_stream *xdr,
6996                                      struct nfs4_layoutcommit_res *res)
6997 {
6998         struct compound_hdr hdr;
6999         int status;
7000
7001         status = decode_compound_hdr(xdr, &hdr);
7002         if (status)
7003                 goto out;
7004         status = decode_sequence(xdr, &res->seq_res, rqstp);
7005         if (status)
7006                 goto out;
7007         status = decode_putfh(xdr);
7008         if (status)
7009                 goto out;
7010         status = decode_layoutcommit(xdr, rqstp, res);
7011         if (status)
7012                 goto out;
7013         decode_getfattr(xdr, res->fattr, res->server);
7014 out:
7015         return status;
7016 }
7017
7018 /*
7019  * Decode SECINFO_NO_NAME response
7020  */
7021 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7022                                         struct xdr_stream *xdr,
7023                                         struct nfs4_secinfo_res *res)
7024 {
7025         struct compound_hdr hdr;
7026         int status;
7027
7028         status = decode_compound_hdr(xdr, &hdr);
7029         if (status)
7030                 goto out;
7031         status = decode_sequence(xdr, &res->seq_res, rqstp);
7032         if (status)
7033                 goto out;
7034         status = decode_putrootfh(xdr);
7035         if (status)
7036                 goto out;
7037         status = decode_secinfo_no_name(xdr, res);
7038 out:
7039         return status;
7040 }
7041
7042 /*
7043  * Decode TEST_STATEID response
7044  */
7045 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7046                                      struct xdr_stream *xdr,
7047                                      struct nfs41_test_stateid_res *res)
7048 {
7049         struct compound_hdr hdr;
7050         int status;
7051
7052         status = decode_compound_hdr(xdr, &hdr);
7053         if (status)
7054                 goto out;
7055         status = decode_sequence(xdr, &res->seq_res, rqstp);
7056         if (status)
7057                 goto out;
7058         status = decode_test_stateid(xdr, res);
7059 out:
7060         return status;
7061 }
7062
7063 /*
7064  * Decode FREE_STATEID response
7065  */
7066 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7067                                      struct xdr_stream *xdr,
7068                                      struct nfs41_free_stateid_res *res)
7069 {
7070         struct compound_hdr hdr;
7071         int status;
7072
7073         status = decode_compound_hdr(xdr, &hdr);
7074         if (status)
7075                 goto out;
7076         status = decode_sequence(xdr, &res->seq_res, rqstp);
7077         if (status)
7078                 goto out;
7079         status = decode_free_stateid(xdr, res);
7080 out:
7081         return status;
7082 }
7083 #endif /* CONFIG_NFS_V4_1 */
7084
7085 /**
7086  * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7087  *                      the local page cache.
7088  * @xdr: XDR stream where entry resides
7089  * @entry: buffer to fill in with entry data
7090  * @plus: boolean indicating whether this should be a readdirplus entry
7091  *
7092  * Returns zero if successful, otherwise a negative errno value is
7093  * returned.
7094  *
7095  * This function is not invoked during READDIR reply decoding, but
7096  * rather whenever an application invokes the getdents(2) system call
7097  * on a directory already in our cache.
7098  */
7099 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7100                        int plus)
7101 {
7102         uint32_t bitmap[3] = {0};
7103         uint32_t len;
7104         __be32 *p = xdr_inline_decode(xdr, 4);
7105         if (unlikely(!p))
7106                 goto out_overflow;
7107         if (*p == xdr_zero) {
7108                 p = xdr_inline_decode(xdr, 4);
7109                 if (unlikely(!p))
7110                         goto out_overflow;
7111                 if (*p == xdr_zero)
7112                         return -EAGAIN;
7113                 entry->eof = 1;
7114                 return -EBADCOOKIE;
7115         }
7116
7117         p = xdr_inline_decode(xdr, 12);
7118         if (unlikely(!p))
7119                 goto out_overflow;
7120         entry->prev_cookie = entry->cookie;
7121         p = xdr_decode_hyper(p, &entry->cookie);
7122         entry->len = be32_to_cpup(p);
7123
7124         p = xdr_inline_decode(xdr, entry->len);
7125         if (unlikely(!p))
7126                 goto out_overflow;
7127         entry->name = (const char *) p;
7128
7129         /*
7130          * In case the server doesn't return an inode number,
7131          * we fake one here.  (We don't use inode number 0,
7132          * since glibc seems to choke on it...)
7133          */
7134         entry->ino = 1;
7135         entry->fattr->valid = 0;
7136
7137         if (decode_attr_bitmap(xdr, bitmap) < 0)
7138                 goto out_overflow;
7139
7140         if (decode_attr_length(xdr, &len, &p) < 0)
7141                 goto out_overflow;
7142
7143         if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7144                                   NULL, entry->server) < 0)
7145                 goto out_overflow;
7146         if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7147                 entry->ino = entry->fattr->mounted_on_fileid;
7148         else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7149                 entry->ino = entry->fattr->fileid;
7150
7151         entry->d_type = DT_UNKNOWN;
7152         if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7153                 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7154
7155         return 0;
7156
7157 out_overflow:
7158         print_overflow_msg(__func__, xdr);
7159         return -EAGAIN;
7160 }
7161
7162 /*
7163  * We need to translate between nfs status return values and
7164  * the local errno values which may not be the same.
7165  */
7166 static struct {
7167         int stat;
7168         int errno;
7169 } nfs_errtbl[] = {
7170         { NFS4_OK,              0               },
7171         { NFS4ERR_PERM,         -EPERM          },
7172         { NFS4ERR_NOENT,        -ENOENT         },
7173         { NFS4ERR_IO,           -errno_NFSERR_IO},
7174         { NFS4ERR_NXIO,         -ENXIO          },
7175         { NFS4ERR_ACCESS,       -EACCES         },
7176         { NFS4ERR_EXIST,        -EEXIST         },
7177         { NFS4ERR_XDEV,         -EXDEV          },
7178         { NFS4ERR_NOTDIR,       -ENOTDIR        },
7179         { NFS4ERR_ISDIR,        -EISDIR         },
7180         { NFS4ERR_INVAL,        -EINVAL         },
7181         { NFS4ERR_FBIG,         -EFBIG          },
7182         { NFS4ERR_NOSPC,        -ENOSPC         },
7183         { NFS4ERR_ROFS,         -EROFS          },
7184         { NFS4ERR_MLINK,        -EMLINK         },
7185         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
7186         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
7187         { NFS4ERR_DQUOT,        -EDQUOT         },
7188         { NFS4ERR_STALE,        -ESTALE         },
7189         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
7190         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
7191         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
7192         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
7193         { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
7194         { NFS4ERR_BADTYPE,      -EBADTYPE       },
7195         { NFS4ERR_LOCKED,       -EAGAIN         },
7196         { NFS4ERR_SYMLINK,      -ELOOP          },
7197         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
7198         { NFS4ERR_DEADLOCK,     -EDEADLK        },
7199         { -1,                   -EIO            }
7200 };
7201
7202 /*
7203  * Convert an NFS error code to a local one.
7204  * This one is used jointly by NFSv2 and NFSv3.
7205  */
7206 static int
7207 nfs4_stat_to_errno(int stat)
7208 {
7209         int i;
7210         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7211                 if (nfs_errtbl[i].stat == stat)
7212                         return nfs_errtbl[i].errno;
7213         }
7214         if (stat <= 10000 || stat > 10100) {
7215                 /* The server is looney tunes. */
7216                 return -EREMOTEIO;
7217         }
7218         /* If we cannot translate the error, the recovery routines should
7219          * handle it.
7220          * Note: remaining NFSv4 error codes have values > 10000, so should
7221          * not conflict with native Linux error codes.
7222          */
7223         return -stat;
7224 }
7225
7226 #define PROC(proc, argtype, restype)                            \
7227 [NFSPROC4_CLNT_##proc] = {                                      \
7228         .p_proc   = NFSPROC4_COMPOUND,                          \
7229         .p_encode = (kxdreproc_t)nfs4_xdr_##argtype,            \
7230         .p_decode = (kxdrdproc_t)nfs4_xdr_##restype,            \
7231         .p_arglen = NFS4_##argtype##_sz,                        \
7232         .p_replen = NFS4_##restype##_sz,                        \
7233         .p_statidx = NFSPROC4_CLNT_##proc,                      \
7234         .p_name   = #proc,                                      \
7235 }
7236
7237 struct rpc_procinfo     nfs4_procedures[] = {
7238         PROC(READ,              enc_read,               dec_read),
7239         PROC(WRITE,             enc_write,              dec_write),
7240         PROC(COMMIT,            enc_commit,             dec_commit),
7241         PROC(OPEN,              enc_open,               dec_open),
7242         PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
7243         PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
7244         PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
7245         PROC(CLOSE,             enc_close,              dec_close),
7246         PROC(SETATTR,           enc_setattr,            dec_setattr),
7247         PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
7248         PROC(RENEW,             enc_renew,              dec_renew),
7249         PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
7250         PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7251         PROC(LOCK,              enc_lock,               dec_lock),
7252         PROC(LOCKT,             enc_lockt,              dec_lockt),
7253         PROC(LOCKU,             enc_locku,              dec_locku),
7254         PROC(ACCESS,            enc_access,             dec_access),
7255         PROC(GETATTR,           enc_getattr,            dec_getattr),
7256         PROC(LOOKUP,            enc_lookup,             dec_lookup),
7257         PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
7258         PROC(REMOVE,            enc_remove,             dec_remove),
7259         PROC(RENAME,            enc_rename,             dec_rename),
7260         PROC(LINK,              enc_link,               dec_link),
7261         PROC(SYMLINK,           enc_symlink,            dec_symlink),
7262         PROC(CREATE,            enc_create,             dec_create),
7263         PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
7264         PROC(STATFS,            enc_statfs,             dec_statfs),
7265         PROC(READLINK,          enc_readlink,           dec_readlink),
7266         PROC(READDIR,           enc_readdir,            dec_readdir),
7267         PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
7268         PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
7269         PROC(GETACL,            enc_getacl,             dec_getacl),
7270         PROC(SETACL,            enc_setacl,             dec_setacl),
7271         PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
7272         PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
7273         PROC(SECINFO,           enc_secinfo,            dec_secinfo),
7274 #if defined(CONFIG_NFS_V4_1)
7275         PROC(EXCHANGE_ID,       enc_exchange_id,        dec_exchange_id),
7276         PROC(CREATE_SESSION,    enc_create_session,     dec_create_session),
7277         PROC(DESTROY_SESSION,   enc_destroy_session,    dec_destroy_session),
7278         PROC(SEQUENCE,          enc_sequence,           dec_sequence),
7279         PROC(GET_LEASE_TIME,    enc_get_lease_time,     dec_get_lease_time),
7280         PROC(RECLAIM_COMPLETE,  enc_reclaim_complete,   dec_reclaim_complete),
7281         PROC(GETDEVICEINFO,     enc_getdeviceinfo,      dec_getdeviceinfo),
7282         PROC(LAYOUTGET,         enc_layoutget,          dec_layoutget),
7283         PROC(LAYOUTCOMMIT,      enc_layoutcommit,       dec_layoutcommit),
7284         PROC(LAYOUTRETURN,      enc_layoutreturn,       dec_layoutreturn),
7285         PROC(SECINFO_NO_NAME,   enc_secinfo_no_name,    dec_secinfo_no_name),
7286         PROC(TEST_STATEID,      enc_test_stateid,       dec_test_stateid),
7287         PROC(FREE_STATEID,      enc_free_stateid,       dec_free_stateid),
7288         PROC(GETDEVICELIST,     enc_getdevicelist,      dec_getdevicelist),
7289         PROC(BIND_CONN_TO_SESSION,
7290                         enc_bind_conn_to_session, dec_bind_conn_to_session),
7291         PROC(DESTROY_CLIENTID,  enc_destroy_clientid,   dec_destroy_clientid),
7292 #endif /* CONFIG_NFS_V4_1 */
7293 };
7294
7295 const struct rpc_version nfs_version4 = {
7296         .number                 = 4,
7297         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
7298         .procs                  = nfs4_procedures
7299 };
7300
7301 /*
7302  * Local variables:
7303  *  c-basic-offset: 8
7304  * End:
7305  */