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 "nfs4session.h"
  60 #include "pnfs.h"
  61 #include "netns.h"
  62
  63 #define NFSDBG_FACILITY         NFSDBG_XDR
  64
  65 /* Mapping from NFS error code to "errno" error code. */
  66 #define errno_NFSERR_IO         EIO
  67
  68 static int nfs4_stat_to_errno(int);
  69
  70 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
  71 #ifdef DEBUG
  72 #define NFS4_MAXTAGLEN          20
  73 #else
  74 #define NFS4_MAXTAGLEN          0
  75 #endif
  76
  77 /* lock,open owner id:
  78  * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT  >> 2)
  79  */
  80 #define open_owner_id_maxsz     (1 + 2 + 1 + 1 + 2)
  81 #define lock_owner_id_maxsz     (1 + 1 + 4)
  82 #define decode_lockowner_maxsz  (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  83 #define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  84 #define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  85 #define op_encode_hdr_maxsz     (1)
  86 #define op_decode_hdr_maxsz     (2)
  87 #define encode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  88 #define decode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  89 #define encode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  90 #define decode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  91 #define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
  92                                 (NFS4_FHSIZE >> 2))
  93 #define decode_putfh_maxsz      (op_decode_hdr_maxsz)
  94 #define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
  95 #define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
  96 #define encode_getfh_maxsz      (op_encode_hdr_maxsz)
  97 #define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
  98                                 ((3+NFS4_FHSIZE) >> 2))
  99 #define nfs4_fattr_bitmap_maxsz 4
 100 #define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
 101 #define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
 102 #define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
 103 #define nfs4_owner_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 104 #define nfs4_group_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 105 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
 106 /* PI(4 bytes) + LFS(4 bytes) + 1(for null terminator?) + MAXLABELLEN */
 107 #define nfs4_label_maxsz        (4 + 4 + 1 + XDR_QUADLEN(NFS4_MAXLABELLEN))
 108 #define encode_readdir_space 24
 109 #define encode_readdir_bitmask_sz 3
 110 #else
 111 #define nfs4_label_maxsz        0
 112 #define encode_readdir_space 20
 113 #define encode_readdir_bitmask_sz 2
 114 #endif
 115 /* We support only one layout type per file system */
 116 #define decode_mdsthreshold_maxsz (1 + 1 + nfs4_fattr_bitmap_maxsz + 1 + 8)
 117 /* This is based on getfattr, which uses the most attributes: */
 118 #define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
 119                                 3 + 3 + 3 + nfs4_owner_maxsz + \
 120                                 nfs4_group_maxsz + nfs4_label_maxsz + \
 121                                  decode_mdsthreshold_maxsz))
 122 #define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
 123                                 nfs4_fattr_value_maxsz)
 124 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
 125 #define encode_attrs_maxsz      (nfs4_fattr_bitmap_maxsz + \
 126                                  1 + 2 + 1 + \
 127                                 nfs4_owner_maxsz + \
 128                                 nfs4_group_maxsz + \
 129                                 nfs4_label_maxsz + \
 130                                 4 + 4)
 131 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
 132 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
 133 #define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
 134 #define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 135 #define encode_fsinfo_maxsz     (encode_getattr_maxsz)
 136 /* The 5 accounts for the PNFS attributes, and assumes that at most three
 137  * layout types will be returned.
 138  */
 139 #define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + \
 140                                  nfs4_fattr_bitmap_maxsz + 4 + 8 + 5)
 141 #define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 142 #define decode_renew_maxsz      (op_decode_hdr_maxsz)
 143 #define encode_setclientid_maxsz \
 144                                 (op_encode_hdr_maxsz + \
 145                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 146                                 XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
 147                                 1 /* sc_prog */ + \
 148                                 XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 149                                 XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
 150                                 1) /* sc_cb_ident */
 151 #define decode_setclientid_maxsz \
 152                                 (op_decode_hdr_maxsz + \
 153                                 2 + \
 154                                 1024) /* large value for CLID_INUSE */
 155 #define encode_setclientid_confirm_maxsz \
 156                                 (op_encode_hdr_maxsz + \
 157                                 3 + (NFS4_VERIFIER_SIZE >> 2))
 158 #define decode_setclientid_confirm_maxsz \
 159                                 (op_decode_hdr_maxsz)
 160 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
 161 #define decode_lookup_maxsz     (op_decode_hdr_maxsz)
 162 #define encode_share_access_maxsz \
 163                                 (2)
 164 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
 165 #define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
 166 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
 167 #define encode_open_maxsz       (op_encode_hdr_maxsz + \
 168                                 2 + encode_share_access_maxsz + 2 + \
 169                                 open_owner_id_maxsz + \
 170                                 encode_opentype_maxsz + \
 171                                 encode_claim_null_maxsz)
 172 #define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
 173 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
 174                                 decode_ace_maxsz)
 175 #define decode_change_info_maxsz        (5)
 176 #define decode_open_maxsz       (op_decode_hdr_maxsz + \
 177                                 decode_stateid_maxsz + \
 178                                 decode_change_info_maxsz + 1 + \
 179                                 nfs4_fattr_bitmap_maxsz + \
 180                                 decode_delegation_maxsz)
 181 #define encode_open_confirm_maxsz \
 182                                 (op_encode_hdr_maxsz + \
 183                                  encode_stateid_maxsz + 1)
 184 #define decode_open_confirm_maxsz \
 185                                 (op_decode_hdr_maxsz + \
 186                                  decode_stateid_maxsz)
 187 #define encode_open_downgrade_maxsz \
 188                                 (op_encode_hdr_maxsz + \
 189                                  encode_stateid_maxsz + 1 + \
 190                                  encode_share_access_maxsz)
 191 #define decode_open_downgrade_maxsz \
 192                                 (op_decode_hdr_maxsz + \
 193                                  decode_stateid_maxsz)
 194 #define encode_close_maxsz      (op_encode_hdr_maxsz + \
 195                                  1 + encode_stateid_maxsz)
 196 #define decode_close_maxsz      (op_decode_hdr_maxsz + \
 197                                  decode_stateid_maxsz)
 198 #define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
 199                                  encode_stateid_maxsz + \
 200                                  encode_attrs_maxsz)
 201 #define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
 202                                  nfs4_fattr_bitmap_maxsz)
 203 #define encode_read_maxsz       (op_encode_hdr_maxsz + \
 204                                  encode_stateid_maxsz + 3)
 205 #define decode_read_maxsz       (op_decode_hdr_maxsz + 2)
 206 #define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
 207                                  2 + encode_verifier_maxsz + 5 + \
 208                                 nfs4_label_maxsz)
 209 #define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
 210                                  decode_verifier_maxsz + \
 211                                 nfs4_label_maxsz + nfs4_fattr_maxsz)
 212 #define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 213 #define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1)
 214 #define encode_write_maxsz      (op_encode_hdr_maxsz + \
 215                                  encode_stateid_maxsz + 4)
 216 #define decode_write_maxsz      (op_decode_hdr_maxsz + \
 217                                  2 + decode_verifier_maxsz)
 218 #define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
 219 #define decode_commit_maxsz     (op_decode_hdr_maxsz + \
 220                                  decode_verifier_maxsz)
 221 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 222                                 nfs4_name_maxsz)
 223 #define decode_remove_maxsz     (op_decode_hdr_maxsz + \
 224                                  decode_change_info_maxsz)
 225 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 226                                 2 * nfs4_name_maxsz)
 227 #define decode_rename_maxsz     (op_decode_hdr_maxsz + \
 228                                  decode_change_info_maxsz + \
 229                                  decode_change_info_maxsz)
 230 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 231                                 nfs4_name_maxsz)
 232 #define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
 233 #define encode_lockowner_maxsz  (7)
 234 #define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 235                                  7 + \
 236                                  1 + encode_stateid_maxsz + 1 + \
 237                                  encode_lockowner_maxsz)
 238 #define decode_lock_denied_maxsz \
 239                                 (8 + decode_lockowner_maxsz)
 240 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 241                                  decode_lock_denied_maxsz)
 242 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 5 + \
 243                                 encode_lockowner_maxsz)
 244 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 245                                  decode_lock_denied_maxsz)
 246 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 247                                  encode_stateid_maxsz + \
 248                                  4)
 249 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 250                                  decode_stateid_maxsz)
 251 #define encode_release_lockowner_maxsz \
 252                                 (op_encode_hdr_maxsz + \
 253                                  encode_lockowner_maxsz)
 254 #define decode_release_lockowner_maxsz \
 255                                 (op_decode_hdr_maxsz)
 256 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 257 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 258 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 259                                 1 + nfs4_name_maxsz + \
 260                                 1 + \
 261                                 nfs4_fattr_maxsz)
 262 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 263 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 264                                 1 + 2 + nfs4_name_maxsz + \
 265                                 encode_attrs_maxsz)
 266 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
 267                                 decode_change_info_maxsz + \
 268                                 nfs4_fattr_bitmap_maxsz)
 269 #define encode_statfs_maxsz     (encode_getattr_maxsz)
 270 #define decode_statfs_maxsz     (decode_getattr_maxsz)
 271 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 272 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 273 #define encode_getacl_maxsz     (encode_getattr_maxsz)
 274 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 275                                  nfs4_fattr_bitmap_maxsz + 1)
 276 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 277                                  encode_stateid_maxsz + 3)
 278 #define decode_setacl_maxsz     (decode_setattr_maxsz)
 279 #define encode_fs_locations_maxsz \
 280                                 (encode_getattr_maxsz)
 281 #define decode_fs_locations_maxsz \
 282                                 (0)
 283 #define encode_secinfo_maxsz    (op_encode_hdr_maxsz + nfs4_name_maxsz)
 284 #define decode_secinfo_maxsz    (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
 285
 286 #if defined(CONFIG_NFS_V4_1)
 287 #define NFS4_MAX_MACHINE_NAME_LEN (64)
 288 #define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \
 289                          sizeof(utsname()->version) + sizeof(utsname()->machine) + 8)
 290
 291 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
 292                                 encode_verifier_maxsz + \
 293                                 1 /* co_ownerid.len */ + \
 294                                 XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
 295                                 1 /* flags */ + \
 296                                 1 /* spa_how */ + \
 297                                 0 /* SP4_NONE (for now) */ + \
 298                                 1 /* implementation id array of size 1 */ + \
 299                                 1 /* nii_domain */ + \
 300                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 301                                 1 /* nii_name */ + \
 302                                 XDR_QUADLEN(IMPL_NAME_LIMIT) + \
 303                                 3 /* nii_date */)
 304 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
 305                                 2 /* eir_clientid */ + \
 306                                 1 /* eir_sequenceid */ + \
 307                                 1 /* eir_flags */ + \
 308                                 1 /* spr_how */ + \
 309                                 0 /* SP4_NONE (for now) */ + \
 310                                 2 /* eir_server_owner.so_minor_id */ + \
 311                                 /* eir_server_owner.so_major_id<> */ \
 312                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 313                                 /* eir_server_scope<> */ \
 314                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 315                                 1 /* eir_server_impl_id array length */ + \
 316                                 1 /* nii_domain */ + \
 317                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 318                                 1 /* nii_name */ + \
 319                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 320                                 3 /* nii_date */)
 321 #define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
 322 #define decode_channel_attrs_maxsz  (6 + \
 323                                      1 /* ca_rdma_ird.len */ + \
 324                                      1 /* ca_rdma_ird */)
 325 #define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
 326                                      2 /* csa_clientid */ + \
 327                                      1 /* csa_sequence */ + \
 328                                      1 /* csa_flags */ + \
 329                                      encode_channel_attrs_maxsz + \
 330                                      encode_channel_attrs_maxsz + \
 331                                      1 /* csa_cb_program */ + \
 332                                      1 /* csa_sec_parms.len (1) */ + \
 333                                      1 /* cb_secflavor (AUTH_SYS) */ + \
 334                                      1 /* stamp */ + \
 335                                      1 /* machinename.len */ + \
 336                                      XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
 337                                      1 /* uid */ + \
 338                                      1 /* gid */ + \
 339                                      1 /* gids.len (0) */)
 340 #define decode_create_session_maxsz  (op_decode_hdr_maxsz +     \
 341                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 342                                      1 /* csr_sequence */ + \
 343                                      1 /* csr_flags */ + \
 344                                      decode_channel_attrs_maxsz + \
 345                                      decode_channel_attrs_maxsz)
 346 #define encode_bind_conn_to_session_maxsz  (op_encode_hdr_maxsz + \
 347                                      /* bctsa_sessid */ \
 348                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 349                                      1 /* bctsa_dir */ + \
 350                                      1 /* bctsa_use_conn_in_rdma_mode */)
 351 #define decode_bind_conn_to_session_maxsz  (op_decode_hdr_maxsz +       \
 352                                      /* bctsr_sessid */ \
 353                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 354                                      1 /* bctsr_dir */ + \
 355                                      1 /* bctsr_use_conn_in_rdma_mode */)
 356 #define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
 357 #define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
 358 #define encode_destroy_clientid_maxsz   (op_encode_hdr_maxsz + 2)
 359 #define decode_destroy_clientid_maxsz   (op_decode_hdr_maxsz)
 360 #define encode_sequence_maxsz   (op_encode_hdr_maxsz + \
 361                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
 362 #define decode_sequence_maxsz   (op_decode_hdr_maxsz + \
 363                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
 364 #define encode_reclaim_complete_maxsz   (op_encode_hdr_maxsz + 4)
 365 #define decode_reclaim_complete_maxsz   (op_decode_hdr_maxsz + 4)
 366 #define encode_getdevicelist_maxsz (op_encode_hdr_maxsz + 4 + \
 367                                 encode_verifier_maxsz)
 368 #define decode_getdevicelist_maxsz (op_decode_hdr_maxsz + \
 369                                 2 /* nfs_cookie4 gdlr_cookie */ + \
 370                                 decode_verifier_maxsz \
 371                                   /* verifier4 gdlr_verifier */ + \
 372                                 1 /* gdlr_deviceid_list count */ + \
 373                                 XDR_QUADLEN(NFS4_PNFS_GETDEVLIST_MAXNUM * \
 374                                             NFS4_DEVICEID4_SIZE) \
 375                                   /* gdlr_deviceid_list */ + \
 376                                 1 /* bool gdlr_eof */)
 377 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + 4 + \
 378                                 XDR_QUADLEN(NFS4_DEVICEID4_SIZE))
 379 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
 380                                 1 /* layout type */ + \
 381                                 1 /* opaque devaddr4 length */ + \
 382                                   /* devaddr4 payload is read into page */ \
 383                                 1 /* notification bitmap length */ + \
 384                                 1 /* notification bitmap */)
 385 #define encode_layoutget_maxsz  (op_encode_hdr_maxsz + 10 + \
 386                                 encode_stateid_maxsz)
 387 #define decode_layoutget_maxsz  (op_decode_hdr_maxsz + 8 + \
 388                                 decode_stateid_maxsz + \
 389                                 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
 390 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz +          \
 391                                 2 /* offset */ + \
 392                                 2 /* length */ + \
 393                                 1 /* reclaim */ + \
 394                                 encode_stateid_maxsz + \
 395                                 1 /* new offset (true) */ + \
 396                                 2 /* last byte written */ + \
 397                                 1 /* nt_timechanged (false) */ + \
 398                                 1 /* layoutupdate4 layout type */ + \
 399                                 1 /* NULL filelayout layoutupdate4 payload */)
 400 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
 401 #define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
 402                                 encode_stateid_maxsz + \
 403                                 1 /* FIXME: opaque lrf_body always empty at the moment */)
 404 #define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
 405                                 1 + decode_stateid_maxsz)
 406 #define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
 407 #define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
 408 #define encode_test_stateid_maxsz       (op_encode_hdr_maxsz + 2 + \
 409                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 410 #define decode_test_stateid_maxsz       (op_decode_hdr_maxsz + 2 + 1)
 411 #define encode_free_stateid_maxsz       (op_encode_hdr_maxsz + 1 + \
 412                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 413 #define decode_free_stateid_maxsz       (op_decode_hdr_maxsz + 1)
 414 #else /* CONFIG_NFS_V4_1 */
 415 #define encode_sequence_maxsz   0
 416 #define decode_sequence_maxsz   0
 417 #endif /* CONFIG_NFS_V4_1 */
 418
 419 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 420 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 421 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 422                                 encode_sequence_maxsz + \
 423                                 encode_putfh_maxsz + \
 424                                 encode_read_maxsz)
 425 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 426                                 decode_sequence_maxsz + \
 427                                 decode_putfh_maxsz + \
 428                                 decode_read_maxsz)
 429 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 430                                 encode_sequence_maxsz + \
 431                                 encode_putfh_maxsz + \
 432                                 encode_readlink_maxsz)
 433 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 434                                 decode_sequence_maxsz + \
 435                                 decode_putfh_maxsz + \
 436                                 decode_readlink_maxsz)
 437 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 438                                 encode_sequence_maxsz + \
 439                                 encode_putfh_maxsz + \
 440                                 encode_readdir_maxsz)
 441 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 442                                 decode_sequence_maxsz + \
 443                                 decode_putfh_maxsz + \
 444                                 decode_readdir_maxsz)
 445 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 446                                 encode_sequence_maxsz + \
 447                                 encode_putfh_maxsz + \
 448                                 encode_write_maxsz + \
 449                                 encode_getattr_maxsz)
 450 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 451                                 decode_sequence_maxsz + \
 452                                 decode_putfh_maxsz + \
 453                                 decode_write_maxsz + \
 454                                 decode_getattr_maxsz)
 455 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 456                                 encode_sequence_maxsz + \
 457                                 encode_putfh_maxsz + \
 458                                 encode_commit_maxsz)
 459 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 460                                 decode_sequence_maxsz + \
 461                                 decode_putfh_maxsz + \
 462                                 decode_commit_maxsz)
 463 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 464                                 encode_sequence_maxsz + \
 465                                 encode_putfh_maxsz + \
 466                                 encode_open_maxsz + \
 467                                 encode_access_maxsz + \
 468                                 encode_getfh_maxsz + \
 469                                 encode_getattr_maxsz)
 470 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 471                                 decode_sequence_maxsz + \
 472                                 decode_putfh_maxsz + \
 473                                 decode_open_maxsz + \
 474                                 decode_access_maxsz + \
 475                                 decode_getfh_maxsz + \
 476                                 decode_getattr_maxsz)
 477 #define NFS4_enc_open_confirm_sz \
 478                                 (compound_encode_hdr_maxsz + \
 479                                  encode_putfh_maxsz + \
 480                                  encode_open_confirm_maxsz)
 481 #define NFS4_dec_open_confirm_sz \
 482                                 (compound_decode_hdr_maxsz + \
 483                                  decode_putfh_maxsz + \
 484                                  decode_open_confirm_maxsz)
 485 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 486                                         encode_sequence_maxsz + \
 487                                         encode_putfh_maxsz + \
 488                                         encode_open_maxsz + \
 489                                         encode_access_maxsz + \
 490                                         encode_getattr_maxsz)
 491 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 492                                         decode_sequence_maxsz + \
 493                                         decode_putfh_maxsz + \
 494                                         decode_open_maxsz + \
 495                                         decode_access_maxsz + \
 496                                         decode_getattr_maxsz)
 497 #define NFS4_enc_open_downgrade_sz \
 498                                 (compound_encode_hdr_maxsz + \
 499                                  encode_sequence_maxsz + \
 500                                  encode_putfh_maxsz + \
 501                                  encode_open_downgrade_maxsz + \
 502                                  encode_getattr_maxsz)
 503 #define NFS4_dec_open_downgrade_sz \
 504                                 (compound_decode_hdr_maxsz + \
 505                                  decode_sequence_maxsz + \
 506                                  decode_putfh_maxsz + \
 507                                  decode_open_downgrade_maxsz + \
 508                                  decode_getattr_maxsz)
 509 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 510                                  encode_sequence_maxsz + \
 511                                  encode_putfh_maxsz + \
 512                                  encode_close_maxsz + \
 513                                  encode_getattr_maxsz)
 514 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 515                                  decode_sequence_maxsz + \
 516                                  decode_putfh_maxsz + \
 517                                  decode_close_maxsz + \
 518                                  decode_getattr_maxsz)
 519 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 520                                  encode_sequence_maxsz + \
 521                                  encode_putfh_maxsz + \
 522                                  encode_setattr_maxsz + \
 523                                  encode_getattr_maxsz)
 524 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 525                                  decode_sequence_maxsz + \
 526                                  decode_putfh_maxsz + \
 527                                  decode_setattr_maxsz + \
 528                                  decode_getattr_maxsz)
 529 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 530                                 encode_sequence_maxsz + \
 531                                 encode_putfh_maxsz + \
 532                                 encode_fsinfo_maxsz)
 533 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 534                                 decode_sequence_maxsz + \
 535                                 decode_putfh_maxsz + \
 536                                 decode_fsinfo_maxsz)
 537 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 538                                 encode_renew_maxsz)
 539 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 540                                 decode_renew_maxsz)
 541 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 542                                 encode_setclientid_maxsz)
 543 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 544                                 decode_setclientid_maxsz)
 545 #define NFS4_enc_setclientid_confirm_sz \
 546                                 (compound_encode_hdr_maxsz + \
 547                                 encode_setclientid_confirm_maxsz)
 548 #define NFS4_dec_setclientid_confirm_sz \
 549                                 (compound_decode_hdr_maxsz + \
 550                                 decode_setclientid_confirm_maxsz)
 551 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 552                                 encode_sequence_maxsz + \
 553                                 encode_putfh_maxsz + \
 554                                 encode_lock_maxsz)
 555 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 556                                 decode_sequence_maxsz + \
 557                                 decode_putfh_maxsz + \
 558                                 decode_lock_maxsz)
 559 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 560                                 encode_sequence_maxsz + \
 561                                 encode_putfh_maxsz + \
 562                                 encode_lockt_maxsz)
 563 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 564                                  decode_sequence_maxsz + \
 565                                  decode_putfh_maxsz + \
 566                                  decode_lockt_maxsz)
 567 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 568                                 encode_sequence_maxsz + \
 569                                 encode_putfh_maxsz + \
 570                                 encode_locku_maxsz)
 571 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 572                                 decode_sequence_maxsz + \
 573                                 decode_putfh_maxsz + \
 574                                 decode_locku_maxsz)
 575 #define NFS4_enc_release_lockowner_sz \
 576                                 (compound_encode_hdr_maxsz + \
 577                                  encode_lockowner_maxsz)
 578 #define NFS4_dec_release_lockowner_sz \
 579                                 (compound_decode_hdr_maxsz + \
 580                                  decode_lockowner_maxsz)
 581 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 582                                 encode_sequence_maxsz + \
 583                                 encode_putfh_maxsz + \
 584                                 encode_access_maxsz + \
 585                                 encode_getattr_maxsz)
 586 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 587                                 decode_sequence_maxsz + \
 588                                 decode_putfh_maxsz + \
 589                                 decode_access_maxsz + \
 590                                 decode_getattr_maxsz)
 591 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 592                                 encode_sequence_maxsz + \
 593                                 encode_putfh_maxsz + \
 594                                 encode_getattr_maxsz)
 595 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 596                                 decode_sequence_maxsz + \
 597                                 decode_putfh_maxsz + \
 598                                 decode_getattr_maxsz)
 599 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 600                                 encode_sequence_maxsz + \
 601                                 encode_putfh_maxsz + \
 602                                 encode_lookup_maxsz + \
 603                                 encode_getattr_maxsz + \
 604                                 encode_getfh_maxsz)
 605 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 606                                 decode_sequence_maxsz + \
 607                                 decode_putfh_maxsz + \
 608                                 decode_lookup_maxsz + \
 609                                 decode_getattr_maxsz + \
 610                                 decode_getfh_maxsz)
 611 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 612                                 encode_sequence_maxsz + \
 613                                 encode_putrootfh_maxsz + \
 614                                 encode_getattr_maxsz + \
 615                                 encode_getfh_maxsz)
 616 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 617                                 decode_sequence_maxsz + \
 618                                 decode_putrootfh_maxsz + \
 619                                 decode_getattr_maxsz + \
 620                                 decode_getfh_maxsz)
 621 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 622                                 encode_sequence_maxsz + \
 623                                 encode_putfh_maxsz + \
 624                                 encode_remove_maxsz)
 625 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 626                                 decode_sequence_maxsz + \
 627                                 decode_putfh_maxsz + \
 628                                 decode_remove_maxsz)
 629 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 630                                 encode_sequence_maxsz + \
 631                                 encode_putfh_maxsz + \
 632                                 encode_savefh_maxsz + \
 633                                 encode_putfh_maxsz + \
 634                                 encode_rename_maxsz)
 635 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 636                                 decode_sequence_maxsz + \
 637                                 decode_putfh_maxsz + \
 638                                 decode_savefh_maxsz + \
 639                                 decode_putfh_maxsz + \
 640                                 decode_rename_maxsz)
 641 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 642                                 encode_sequence_maxsz + \
 643                                 encode_putfh_maxsz + \
 644                                 encode_savefh_maxsz + \
 645                                 encode_putfh_maxsz + \
 646                                 encode_link_maxsz + \
 647                                 encode_restorefh_maxsz + \
 648                                 encode_getattr_maxsz)
 649 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 650                                 decode_sequence_maxsz + \
 651                                 decode_putfh_maxsz + \
 652                                 decode_savefh_maxsz + \
 653                                 decode_putfh_maxsz + \
 654                                 decode_link_maxsz + \
 655                                 decode_restorefh_maxsz + \
 656                                 decode_getattr_maxsz)
 657 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 658                                 encode_sequence_maxsz + \
 659                                 encode_putfh_maxsz + \
 660                                 encode_symlink_maxsz + \
 661                                 encode_getattr_maxsz + \
 662                                 encode_getfh_maxsz)
 663 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 664                                 decode_sequence_maxsz + \
 665                                 decode_putfh_maxsz + \
 666                                 decode_symlink_maxsz + \
 667                                 decode_getattr_maxsz + \
 668                                 decode_getfh_maxsz)
 669 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 670                                 encode_sequence_maxsz + \
 671                                 encode_putfh_maxsz + \
 672                                 encode_create_maxsz + \
 673                                 encode_getfh_maxsz + \
 674                                 encode_getattr_maxsz)
 675 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 676                                 decode_sequence_maxsz + \
 677                                 decode_putfh_maxsz + \
 678                                 decode_create_maxsz + \
 679                                 decode_getfh_maxsz + \
 680                                 decode_getattr_maxsz)
 681 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 682                                 encode_sequence_maxsz + \
 683                                 encode_putfh_maxsz + \
 684                                 encode_getattr_maxsz)
 685 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 686                                 decode_sequence_maxsz + \
 687                                 decode_putfh_maxsz + \
 688                                 decode_getattr_maxsz)
 689 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 690                                 encode_sequence_maxsz + \
 691                                 encode_putfh_maxsz + \
 692                                 encode_statfs_maxsz)
 693 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 694                                 decode_sequence_maxsz + \
 695                                 decode_putfh_maxsz + \
 696                                 decode_statfs_maxsz)
 697 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 698                                 encode_sequence_maxsz + \
 699                                 encode_putfh_maxsz + \
 700                                 encode_getattr_maxsz)
 701 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 702                                 decode_sequence_maxsz + \
 703                                 decode_putfh_maxsz + \
 704                                 decode_getattr_maxsz)
 705 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 706                                 encode_sequence_maxsz + \
 707                                 encode_putfh_maxsz + \
 708                                 encode_delegreturn_maxsz + \
 709                                 encode_getattr_maxsz)
 710 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 711                                 decode_sequence_maxsz + \
 712                                 decode_delegreturn_maxsz + \
 713                                 decode_getattr_maxsz)
 714 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 715                                 encode_sequence_maxsz + \
 716                                 encode_putfh_maxsz + \
 717                                 encode_getacl_maxsz)
 718 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 719                                 decode_sequence_maxsz + \
 720                                 decode_putfh_maxsz + \
 721                                 decode_getacl_maxsz)
 722 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 723                                 encode_sequence_maxsz + \
 724                                 encode_putfh_maxsz + \
 725                                 encode_setacl_maxsz)
 726 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 727                                 decode_sequence_maxsz + \
 728                                 decode_putfh_maxsz + \
 729                                 decode_setacl_maxsz)
 730 #define NFS4_enc_fs_locations_sz \
 731                                 (compound_encode_hdr_maxsz + \
 732                                  encode_sequence_maxsz + \
 733                                  encode_putfh_maxsz + \
 734                                  encode_lookup_maxsz + \
 735                                  encode_fs_locations_maxsz)
 736 #define NFS4_dec_fs_locations_sz \
 737                                 (compound_decode_hdr_maxsz + \
 738                                  decode_sequence_maxsz + \
 739                                  decode_putfh_maxsz + \
 740                                  decode_lookup_maxsz + \
 741                                  decode_fs_locations_maxsz)
 742 #define NFS4_enc_secinfo_sz     (compound_encode_hdr_maxsz + \
 743                                 encode_sequence_maxsz + \
 744                                 encode_putfh_maxsz + \
 745                                 encode_secinfo_maxsz)
 746 #define NFS4_dec_secinfo_sz     (compound_decode_hdr_maxsz + \
 747                                 decode_sequence_maxsz + \
 748                                 decode_putfh_maxsz + \
 749                                 decode_secinfo_maxsz)
 750 #if defined(CONFIG_NFS_V4_1)
 751 #define NFS4_enc_bind_conn_to_session_sz \
 752                                 (compound_encode_hdr_maxsz + \
 753                                  encode_bind_conn_to_session_maxsz)
 754 #define NFS4_dec_bind_conn_to_session_sz \
 755                                 (compound_decode_hdr_maxsz + \
 756                                  decode_bind_conn_to_session_maxsz)
 757 #define NFS4_enc_exchange_id_sz \
 758                                 (compound_encode_hdr_maxsz + \
 759                                  encode_exchange_id_maxsz)
 760 #define NFS4_dec_exchange_id_sz \
 761                                 (compound_decode_hdr_maxsz + \
 762                                  decode_exchange_id_maxsz)
 763 #define NFS4_enc_create_session_sz \
 764                                 (compound_encode_hdr_maxsz + \
 765                                  encode_create_session_maxsz)
 766 #define NFS4_dec_create_session_sz \
 767                                 (compound_decode_hdr_maxsz + \
 768                                  decode_create_session_maxsz)
 769 #define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
 770                                          encode_destroy_session_maxsz)
 771 #define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
 772                                          decode_destroy_session_maxsz)
 773 #define NFS4_enc_destroy_clientid_sz    (compound_encode_hdr_maxsz + \
 774                                          encode_destroy_clientid_maxsz)
 775 #define NFS4_dec_destroy_clientid_sz    (compound_decode_hdr_maxsz + \
 776                                          decode_destroy_clientid_maxsz)
 777 #define NFS4_enc_sequence_sz \
 778                                 (compound_decode_hdr_maxsz + \
 779                                  encode_sequence_maxsz)
 780 #define NFS4_dec_sequence_sz \
 781                                 (compound_decode_hdr_maxsz + \
 782                                  decode_sequence_maxsz)
 783 #define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
 784                                          encode_sequence_maxsz + \
 785                                          encode_putrootfh_maxsz + \
 786                                          encode_fsinfo_maxsz)
 787 #define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
 788                                          decode_sequence_maxsz + \
 789                                          decode_putrootfh_maxsz + \
 790                                          decode_fsinfo_maxsz)
 791 #define NFS4_enc_reclaim_complete_sz    (compound_encode_hdr_maxsz + \
 792                                          encode_sequence_maxsz + \
 793                                          encode_reclaim_complete_maxsz)
 794 #define NFS4_dec_reclaim_complete_sz    (compound_decode_hdr_maxsz + \
 795                                          decode_sequence_maxsz + \
 796                                          decode_reclaim_complete_maxsz)
 797 #define NFS4_enc_getdevicelist_sz (compound_encode_hdr_maxsz + \
 798                                 encode_sequence_maxsz + \
 799                                 encode_putfh_maxsz + \
 800                                 encode_getdevicelist_maxsz)
 801 #define NFS4_dec_getdevicelist_sz (compound_decode_hdr_maxsz + \
 802                                 decode_sequence_maxsz + \
 803                                 decode_putfh_maxsz + \
 804                                 decode_getdevicelist_maxsz)
 805 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
 806                                 encode_sequence_maxsz +\
 807                                 encode_getdeviceinfo_maxsz)
 808 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
 809                                 decode_sequence_maxsz + \
 810                                 decode_getdeviceinfo_maxsz)
 811 #define NFS4_enc_layoutget_sz   (compound_encode_hdr_maxsz + \
 812                                 encode_sequence_maxsz + \
 813                                 encode_putfh_maxsz +        \
 814                                 encode_layoutget_maxsz)
 815 #define NFS4_dec_layoutget_sz   (compound_decode_hdr_maxsz + \
 816                                 decode_sequence_maxsz + \
 817                                 decode_putfh_maxsz +        \
 818                                 decode_layoutget_maxsz)
 819 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
 820                                 encode_sequence_maxsz +\
 821                                 encode_putfh_maxsz + \
 822                                 encode_layoutcommit_maxsz + \
 823                                 encode_getattr_maxsz)
 824 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
 825                                 decode_sequence_maxsz + \
 826                                 decode_putfh_maxsz + \
 827                                 decode_layoutcommit_maxsz + \
 828                                 decode_getattr_maxsz)
 829 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
 830                                 encode_sequence_maxsz + \
 831                                 encode_putfh_maxsz + \
 832                                 encode_layoutreturn_maxsz)
 833 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
 834                                 decode_sequence_maxsz + \
 835                                 decode_putfh_maxsz + \
 836                                 decode_layoutreturn_maxsz)
 837 #define NFS4_enc_secinfo_no_name_sz     (compound_encode_hdr_maxsz + \
 838                                         encode_sequence_maxsz + \
 839                                         encode_putrootfh_maxsz +\
 840                                         encode_secinfo_no_name_maxsz)
 841 #define NFS4_dec_secinfo_no_name_sz     (compound_decode_hdr_maxsz + \
 842                                         decode_sequence_maxsz + \
 843                                         decode_putrootfh_maxsz + \
 844                                         decode_secinfo_no_name_maxsz)
 845 #define NFS4_enc_test_stateid_sz        (compound_encode_hdr_maxsz + \
 846                                          encode_sequence_maxsz + \
 847                                          encode_test_stateid_maxsz)
 848 #define NFS4_dec_test_stateid_sz        (compound_decode_hdr_maxsz + \
 849                                          decode_sequence_maxsz + \
 850                                          decode_test_stateid_maxsz)
 851 #define NFS4_enc_free_stateid_sz        (compound_encode_hdr_maxsz + \
 852                                          encode_sequence_maxsz + \
 853                                          encode_free_stateid_maxsz)
 854 #define NFS4_dec_free_stateid_sz        (compound_decode_hdr_maxsz + \
 855                                          decode_sequence_maxsz + \
 856                                          decode_free_stateid_maxsz)
 857
 858 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 859                                       compound_encode_hdr_maxsz +
 860                                       encode_sequence_maxsz +
 861                                       encode_putfh_maxsz +
 862                                       encode_getattr_maxsz) *
 863                                      XDR_UNIT);
 864
 865 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 866                                      compound_decode_hdr_maxsz +
 867                                      decode_sequence_maxsz +
 868                                      decode_putfh_maxsz) *
 869                                     XDR_UNIT);
 870
 871 const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH +
 872                                            compound_decode_hdr_maxsz +
 873                                            decode_sequence_maxsz) *
 874                                           XDR_UNIT);
 875 EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead);
 876 #endif /* CONFIG_NFS_V4_1 */
 877
 878 static const umode_t nfs_type2fmt[] = {
 879         [NF4BAD] = 0,
 880         [NF4REG] = S_IFREG,
 881         [NF4DIR] = S_IFDIR,
 882         [NF4BLK] = S_IFBLK,
 883         [NF4CHR] = S_IFCHR,
 884         [NF4LNK] = S_IFLNK,
 885         [NF4SOCK] = S_IFSOCK,
 886         [NF4FIFO] = S_IFIFO,
 887         [NF4ATTRDIR] = 0,
 888         [NF4NAMEDATTR] = 0,
 889 };
 890
 891 struct compound_hdr {
 892         int32_t         status;
 893         uint32_t        nops;
 894         __be32 *        nops_p;
 895         uint32_t        taglen;
 896         char *          tag;
 897         uint32_t        replen;         /* expected reply words */
 898         u32             minorversion;
 899 };
 900
 901 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
 902 {
 903         __be32 *p = xdr_reserve_space(xdr, nbytes);
 904         BUG_ON(!p);
 905         return p;
 906 }
 907
 908 static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
 909 {
 910         __be32 *p;
 911
 912         p = xdr_reserve_space(xdr, len);
 913         xdr_encode_opaque_fixed(p, buf, len);
 914 }
 915
 916 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 917 {
 918         __be32 *p;
 919
 920         p = reserve_space(xdr, 4 + len);
 921         xdr_encode_opaque(p, str, len);
 922 }
 923
 924 static void encode_uint32(struct xdr_stream *xdr, u32 n)
 925 {
 926         __be32 *p;
 927
 928         p = reserve_space(xdr, 4);
 929         *p = cpu_to_be32(n);
 930 }
 931
 932 static void encode_uint64(struct xdr_stream *xdr, u64 n)
 933 {
 934         __be32 *p;
 935
 936         p = reserve_space(xdr, 8);
 937         xdr_encode_hyper(p, n);
 938 }
 939
 940 static void encode_nfs4_seqid(struct xdr_stream *xdr,
 941                 const struct nfs_seqid *seqid)
 942 {
 943         encode_uint32(xdr, seqid->sequence->counter);
 944 }
 945
 946 static void encode_compound_hdr(struct xdr_stream *xdr,
 947                                 struct rpc_rqst *req,
 948                                 struct compound_hdr *hdr)
 949 {
 950         __be32 *p;
 951         struct rpc_auth *auth = req->rq_cred->cr_auth;
 952
 953         /* initialize running count of expected bytes in reply.
 954          * NOTE: the replied tag SHOULD be the same is the one sent,
 955          * but this is not required as a MUST for the server to do so. */
 956         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
 957
 958         WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
 959         encode_string(xdr, hdr->taglen, hdr->tag);
 960         p = reserve_space(xdr, 8);
 961         *p++ = cpu_to_be32(hdr->minorversion);
 962         hdr->nops_p = p;
 963         *p = cpu_to_be32(hdr->nops);
 964 }
 965
 966 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
 967                 uint32_t replen,
 968                 struct compound_hdr *hdr)
 969 {
 970         encode_uint32(xdr, op);
 971         hdr->nops++;
 972         hdr->replen += replen;
 973 }
 974
 975 static void encode_nops(struct compound_hdr *hdr)
 976 {
 977         WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
 978         *hdr->nops_p = htonl(hdr->nops);
 979 }
 980
 981 static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
 982 {
 983         encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
 984 }
 985
 986 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 987 {
 988         encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
 989 }
 990
 991 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
 992                                 const struct nfs4_label *label,
 993                                 const struct nfs_server *server)
 994 {
 995         char owner_name[IDMAP_NAMESZ];
 996         char owner_group[IDMAP_NAMESZ];
 997         int owner_namelen = 0;
 998         int owner_grouplen = 0;
 999         __be32 *p;
1000         __be32 *q;
1001         int len;
1002         uint32_t bmval_len = 2;
1003         uint32_t bmval0 = 0;
1004         uint32_t bmval1 = 0;
1005         uint32_t bmval2 = 0;
1006
1007         /*
1008          * We reserve enough space to write the entire attribute buffer at once.
1009          * In the worst-case, this would be
1010          * 16(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
1011          * = 40 bytes, plus any contribution from variable-length fields
1012          *            such as owner/group.
1013          */
1014         len = 8;
1015
1016         /* Sigh */
1017         if (iap->ia_valid & ATTR_SIZE)
1018                 len += 8;
1019         if (iap->ia_valid & ATTR_MODE)
1020                 len += 4;
1021         if (iap->ia_valid & ATTR_UID) {
1022                 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1023                 if (owner_namelen < 0) {
1024                         dprintk("nfs: couldn't resolve uid %d to string\n",
1025                                         from_kuid(&init_user_ns, iap->ia_uid));
1026                         /* XXX */
1027                         strcpy(owner_name, "nobody");
1028                         owner_namelen = sizeof("nobody") - 1;
1029                         /* goto out; */
1030                 }
1031                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1032         }
1033         if (iap->ia_valid & ATTR_GID) {
1034                 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1035                 if (owner_grouplen < 0) {
1036                         dprintk("nfs: couldn't resolve gid %d to string\n",
1037                                         from_kgid(&init_user_ns, iap->ia_gid));
1038                         strcpy(owner_group, "nobody");
1039                         owner_grouplen = sizeof("nobody") - 1;
1040                         /* goto out; */
1041                 }
1042                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1043         }
1044         if (iap->ia_valid & ATTR_ATIME_SET)
1045                 len += 16;
1046         else if (iap->ia_valid & ATTR_ATIME)
1047                 len += 4;
1048         if (iap->ia_valid & ATTR_MTIME_SET)
1049                 len += 16;
1050         else if (iap->ia_valid & ATTR_MTIME)
1051                 len += 4;
1052         if (label) {
1053                 len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1054                 bmval_len = 3;
1055         }
1056
1057         len += bmval_len << 2;
1058         p = reserve_space(xdr, len);
1059
1060         /*
1061          * We write the bitmap length now, but leave the bitmap and the attribute
1062          * buffer length to be backfilled at the end of this routine.
1063          */
1064         *p++ = cpu_to_be32(bmval_len);
1065         q = p;
1066         /* Skip bitmap entries + attrlen */
1067         p += bmval_len + 1;
1068
1069         if (iap->ia_valid & ATTR_SIZE) {
1070                 bmval0 |= FATTR4_WORD0_SIZE;
1071                 p = xdr_encode_hyper(p, iap->ia_size);
1072         }
1073         if (iap->ia_valid & ATTR_MODE) {
1074                 bmval1 |= FATTR4_WORD1_MODE;
1075                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1076         }
1077         if (iap->ia_valid & ATTR_UID) {
1078                 bmval1 |= FATTR4_WORD1_OWNER;
1079                 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1080         }
1081         if (iap->ia_valid & ATTR_GID) {
1082                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
1083                 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1084         }
1085         if (iap->ia_valid & ATTR_ATIME_SET) {
1086                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
1087                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1088                 p = xdr_encode_hyper(p, (s64)iap->ia_atime.tv_sec);
1089                 *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
1090         }
1091         else if (iap->ia_valid & ATTR_ATIME) {
1092                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
1093                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1094         }
1095         if (iap->ia_valid & ATTR_MTIME_SET) {
1096                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
1097                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1098                 p = xdr_encode_hyper(p, (s64)iap->ia_mtime.tv_sec);
1099                 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1100         }
1101         else if (iap->ia_valid & ATTR_MTIME) {
1102                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
1103                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1104         }
1105         if (label) {
1106                 bmval2 |= FATTR4_WORD2_SECURITY_LABEL;
1107                 *p++ = cpu_to_be32(label->lfs);
1108                 *p++ = cpu_to_be32(label->pi);
1109                 *p++ = cpu_to_be32(label->len);
1110                 p = xdr_encode_opaque_fixed(p, label->label, label->len);
1111         }
1112
1113         /*
1114          * Now we backfill the bitmap and the attribute buffer length.
1115          */
1116         if (len != ((char *)p - (char *)q) + 4) {
1117                 printk(KERN_ERR "NFS: Attr length error, %u != %Zu\n",
1118                                 len, ((char *)p - (char *)q) + 4);
1119                 BUG();
1120         }
1121         *q++ = htonl(bmval0);
1122         *q++ = htonl(bmval1);
1123         if (bmval_len == 3)
1124                 *q++ = htonl(bmval2);
1125         len = (char *)p - (char *)(q + 1);
1126         *q = htonl(len);
1127
1128 /* out: */
1129 }
1130
1131 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1132 {
1133         encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1134         encode_uint32(xdr, access);
1135 }
1136
1137 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1138 {
1139         encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1140         encode_nfs4_seqid(xdr, arg->seqid);
1141         encode_nfs4_stateid(xdr, arg->stateid);
1142 }
1143
1144 static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1145 {
1146         __be32 *p;
1147
1148         encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1149         p = reserve_space(xdr, 12);
1150         p = xdr_encode_hyper(p, args->offset);
1151         *p = cpu_to_be32(args->count);
1152 }
1153
1154 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1155 {
1156         __be32 *p;
1157
1158         encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1159         encode_uint32(xdr, create->ftype);
1160
1161         switch (create->ftype) {
1162         case NF4LNK:
1163                 p = reserve_space(xdr, 4);
1164                 *p = cpu_to_be32(create->u.symlink.len);
1165                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
1166                 break;
1167
1168         case NF4BLK: case NF4CHR:
1169                 p = reserve_space(xdr, 8);
1170                 *p++ = cpu_to_be32(create->u.device.specdata1);
1171                 *p = cpu_to_be32(create->u.device.specdata2);
1172                 break;
1173
1174         default:
1175                 break;
1176         }
1177
1178         encode_string(xdr, create->name->len, create->name->name);
1179         encode_attrs(xdr, create->attrs, create->label, create->server);
1180 }
1181
1182 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1183 {
1184         __be32 *p;
1185
1186         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1187         p = reserve_space(xdr, 8);
1188         *p++ = cpu_to_be32(1);
1189         *p = cpu_to_be32(bitmap);
1190 }
1191
1192 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1193 {
1194         __be32 *p;
1195
1196         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1197         p = reserve_space(xdr, 12);
1198         *p++ = cpu_to_be32(2);
1199         *p++ = cpu_to_be32(bm0);
1200         *p = cpu_to_be32(bm1);
1201 }
1202
1203 static void
1204 encode_getattr_three(struct xdr_stream *xdr,
1205                      uint32_t bm0, uint32_t bm1, uint32_t bm2,
1206                      struct compound_hdr *hdr)
1207 {
1208         __be32 *p;
1209
1210         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1211         if (bm2) {
1212                 p = reserve_space(xdr, 16);
1213                 *p++ = cpu_to_be32(3);
1214                 *p++ = cpu_to_be32(bm0);
1215                 *p++ = cpu_to_be32(bm1);
1216                 *p = cpu_to_be32(bm2);
1217         } else if (bm1) {
1218                 p = reserve_space(xdr, 12);
1219                 *p++ = cpu_to_be32(2);
1220                 *p++ = cpu_to_be32(bm0);
1221                 *p = cpu_to_be32(bm1);
1222         } else {
1223                 p = reserve_space(xdr, 8);
1224                 *p++ = cpu_to_be32(1);
1225                 *p = cpu_to_be32(bm0);
1226         }
1227 }
1228
1229 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1230 {
1231         encode_getattr_three(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1232                            bitmask[1] & nfs4_fattr_bitmap[1],
1233                            bitmask[2] & nfs4_fattr_bitmap[2],
1234                            hdr);
1235 }
1236
1237 static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1238                                  const u32 *open_bitmap,
1239                                  struct compound_hdr *hdr)
1240 {
1241         encode_getattr_three(xdr,
1242                              bitmask[0] & open_bitmap[0],
1243                              bitmask[1] & open_bitmap[1],
1244                              bitmask[2] & open_bitmap[2],
1245                              hdr);
1246 }
1247
1248 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1249 {
1250         encode_getattr_three(xdr,
1251                              bitmask[0] & nfs4_fsinfo_bitmap[0],
1252                              bitmask[1] & nfs4_fsinfo_bitmap[1],
1253                              bitmask[2] & nfs4_fsinfo_bitmap[2],
1254                              hdr);
1255 }
1256
1257 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1258 {
1259         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1260                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1261 }
1262
1263 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1264 {
1265         encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1266 }
1267
1268 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1269 {
1270         encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1271         encode_string(xdr, name->len, name->name);
1272 }
1273
1274 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1275 {
1276         if (fl->fl_type == F_RDLCK)
1277                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1278         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1279 }
1280
1281 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1282 {
1283         if (fl->fl_end == OFFSET_MAX)
1284                 return ~(uint64_t)0;
1285         return fl->fl_end - fl->fl_start + 1;
1286 }
1287
1288 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1289 {
1290         __be32 *p;
1291
1292         p = reserve_space(xdr, 32);
1293         p = xdr_encode_hyper(p, lowner->clientid);
1294         *p++ = cpu_to_be32(20);
1295         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1296         *p++ = cpu_to_be32(lowner->s_dev);
1297         xdr_encode_hyper(p, lowner->id);
1298 }
1299
1300 /*
1301  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1302  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1303  */
1304 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1305 {
1306         __be32 *p;
1307
1308         encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1309         p = reserve_space(xdr, 28);
1310         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1311         *p++ = cpu_to_be32(args->reclaim);
1312         p = xdr_encode_hyper(p, args->fl->fl_start);
1313         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1314         *p = cpu_to_be32(args->new_lock_owner);
1315         if (args->new_lock_owner){
1316                 encode_nfs4_seqid(xdr, args->open_seqid);
1317                 encode_nfs4_stateid(xdr, args->open_stateid);
1318                 encode_nfs4_seqid(xdr, args->lock_seqid);
1319                 encode_lockowner(xdr, &args->lock_owner);
1320         }
1321         else {
1322                 encode_nfs4_stateid(xdr, args->lock_stateid);
1323                 encode_nfs4_seqid(xdr, args->lock_seqid);
1324         }
1325 }
1326
1327 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1328 {
1329         __be32 *p;
1330
1331         encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1332         p = reserve_space(xdr, 20);
1333         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1334         p = xdr_encode_hyper(p, args->fl->fl_start);
1335         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1336         encode_lockowner(xdr, &args->lock_owner);
1337 }
1338
1339 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1340 {
1341         __be32 *p;
1342
1343         encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1344         encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1345         encode_nfs4_seqid(xdr, args->seqid);
1346         encode_nfs4_stateid(xdr, args->stateid);
1347         p = reserve_space(xdr, 16);
1348         p = xdr_encode_hyper(p, args->fl->fl_start);
1349         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1350 }
1351
1352 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1353 {
1354         encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1355         encode_lockowner(xdr, lowner);
1356 }
1357
1358 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1359 {
1360         encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1361         encode_string(xdr, name->len, name->name);
1362 }
1363
1364 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1365 {
1366         __be32 *p;
1367
1368         p = reserve_space(xdr, 8);
1369         switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1370         case FMODE_READ:
1371                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1372                 break;
1373         case FMODE_WRITE:
1374                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1375                 break;
1376         case FMODE_READ|FMODE_WRITE:
1377                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1378                 break;
1379         default:
1380                 *p++ = cpu_to_be32(0);
1381         }
1382         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1383 }
1384
1385 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1386 {
1387         __be32 *p;
1388  /*
1389  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1390  * owner 4 = 32
1391  */
1392         encode_nfs4_seqid(xdr, arg->seqid);
1393         encode_share_access(xdr, arg->fmode);
1394         p = reserve_space(xdr, 36);
1395         p = xdr_encode_hyper(p, arg->clientid);
1396         *p++ = cpu_to_be32(24);
1397         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1398         *p++ = cpu_to_be32(arg->server->s_dev);
1399         *p++ = cpu_to_be32(arg->id.uniquifier);
1400         xdr_encode_hyper(p, arg->id.create_time);
1401 }
1402
1403 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1404 {
1405         struct iattr dummy;
1406         __be32 *p;
1407
1408         p = reserve_space(xdr, 4);
1409         switch(arg->createmode) {
1410         case NFS4_CREATE_UNCHECKED:
1411                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1412                 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server);
1413                 break;
1414         case NFS4_CREATE_GUARDED:
1415                 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1416                 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server);
1417                 break;
1418         case NFS4_CREATE_EXCLUSIVE:
1419                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1420                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1421                 break;
1422         case NFS4_CREATE_EXCLUSIVE4_1:
1423                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1424                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1425                 dummy.ia_valid = 0;
1426                 encode_attrs(xdr, &dummy, arg->label, arg->server);
1427         }
1428 }
1429
1430 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1431 {
1432         __be32 *p;
1433
1434         p = reserve_space(xdr, 4);
1435         switch (arg->open_flags & O_CREAT) {
1436         case 0:
1437                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1438                 break;
1439         default:
1440                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1441                 encode_createmode(xdr, arg);
1442         }
1443 }
1444
1445 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1446 {
1447         __be32 *p;
1448
1449         p = reserve_space(xdr, 4);
1450         switch (delegation_type) {
1451         case 0:
1452                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1453                 break;
1454         case FMODE_READ:
1455                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1456                 break;
1457         case FMODE_WRITE|FMODE_READ:
1458                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1459                 break;
1460         default:
1461                 BUG();
1462         }
1463 }
1464
1465 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1466 {
1467         __be32 *p;
1468
1469         p = reserve_space(xdr, 4);
1470         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1471         encode_string(xdr, name->len, name->name);
1472 }
1473
1474 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1475 {
1476         __be32 *p;
1477
1478         p = reserve_space(xdr, 4);
1479         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1480         encode_delegation_type(xdr, type);
1481 }
1482
1483 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1484 {
1485         __be32 *p;
1486
1487         p = reserve_space(xdr, 4);
1488         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1489         encode_nfs4_stateid(xdr, stateid);
1490         encode_string(xdr, name->len, name->name);
1491 }
1492
1493 static inline void encode_claim_fh(struct xdr_stream *xdr)
1494 {
1495         __be32 *p;
1496
1497         p = reserve_space(xdr, 4);
1498         *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1499 }
1500
1501 static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1502 {
1503         __be32 *p;
1504
1505         p = reserve_space(xdr, 4);
1506         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1507         encode_nfs4_stateid(xdr, stateid);
1508 }
1509
1510 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1511 {
1512         encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1513         encode_openhdr(xdr, arg);
1514         encode_opentype(xdr, arg);
1515         switch (arg->claim) {
1516         case NFS4_OPEN_CLAIM_NULL:
1517                 encode_claim_null(xdr, arg->name);
1518                 break;
1519         case NFS4_OPEN_CLAIM_PREVIOUS:
1520                 encode_claim_previous(xdr, arg->u.delegation_type);
1521                 break;
1522         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1523                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1524                 break;
1525         case NFS4_OPEN_CLAIM_FH:
1526                 encode_claim_fh(xdr);
1527                 break;
1528         case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1529                 encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1530                 break;
1531         default:
1532                 BUG();
1533         }
1534 }
1535
1536 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1537 {
1538         encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1539         encode_nfs4_stateid(xdr, arg->stateid);
1540         encode_nfs4_seqid(xdr, arg->seqid);
1541 }
1542
1543 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1544 {
1545         encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1546         encode_nfs4_stateid(xdr, arg->stateid);
1547         encode_nfs4_seqid(xdr, arg->seqid);
1548         encode_share_access(xdr, arg->fmode);
1549 }
1550
1551 static void
1552 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1553 {
1554         encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1555         encode_string(xdr, fh->size, fh->data);
1556 }
1557
1558 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1559 {
1560         encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1561 }
1562
1563 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1564 {
1565         __be32 *p;
1566
1567         encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1568         encode_nfs4_stateid(xdr, &args->stateid);
1569
1570         p = reserve_space(xdr, 12);
1571         p = xdr_encode_hyper(p, args->offset);
1572         *p = cpu_to_be32(args->count);
1573 }
1574
1575 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1576 {
1577         uint32_t attrs[3] = {
1578                 FATTR4_WORD0_RDATTR_ERROR,
1579                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1580         };
1581         uint32_t dircount = readdir->count >> 1;
1582         __be32 *p, verf[2];
1583
1584         if (readdir->plus) {
1585                 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1586                         FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1587                 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1588                         FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1589                         FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1590                         FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1591                 dircount >>= 1;
1592         }
1593         /* Use mounted_on_fileid only if the server supports it */
1594         if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1595                 attrs[0] |= FATTR4_WORD0_FILEID;
1596
1597         encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1598         encode_uint64(xdr, readdir->cookie);
1599         encode_nfs4_verifier(xdr, &readdir->verifier);
1600         p = reserve_space(xdr, encode_readdir_space);
1601         *p++ = cpu_to_be32(dircount);
1602         *p++ = cpu_to_be32(readdir->count);
1603         *p++ = cpu_to_be32(encode_readdir_bitmask_sz);
1604         *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1605         *p   = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1606         if (encode_readdir_bitmask_sz > 2) {
1607                 if (hdr->minorversion > 1)
1608                         attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1609                 p++, *p++ = cpu_to_be32(attrs[2] & readdir->bitmask[2]);
1610         }
1611         memcpy(verf, readdir->verifier.data, sizeof(verf));
1612
1613         dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1614                         __func__,
1615                         (unsigned long long)readdir->cookie,
1616                         verf[0], verf[1],
1617                         attrs[0] & readdir->bitmask[0],
1618                         attrs[1] & readdir->bitmask[1],
1619                         attrs[2] & readdir->bitmask[2]);
1620 }
1621
1622 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1623 {
1624         encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1625 }
1626
1627 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1628 {
1629         encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1630         encode_string(xdr, name->len, name->name);
1631 }
1632
1633 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1634 {
1635         encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1636         encode_string(xdr, oldname->len, oldname->name);
1637         encode_string(xdr, newname->len, newname->name);
1638 }
1639
1640 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1641                          struct compound_hdr *hdr)
1642 {
1643         encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1644         encode_uint64(xdr, clid);
1645 }
1646
1647 static void
1648 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1649 {
1650         encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1651 }
1652
1653 static void
1654 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1655 {
1656         __be32 *p;
1657
1658         encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1659         encode_nfs4_stateid(xdr, &zero_stateid);
1660         p = reserve_space(xdr, 2*4);
1661         *p++ = cpu_to_be32(1);
1662         *p = cpu_to_be32(FATTR4_WORD0_ACL);
1663         p = reserve_space(xdr, 4);
1664         *p = cpu_to_be32(arg->acl_len);
1665         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1666 }
1667
1668 static void
1669 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1670 {
1671         encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1672 }
1673
1674 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1675 {
1676         encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1677         encode_nfs4_stateid(xdr, &arg->stateid);
1678         encode_attrs(xdr, arg->iap, arg->label, server);
1679 }
1680
1681 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1682 {
1683         __be32 *p;
1684
1685         encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1686         encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1687
1688         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1689         p = reserve_space(xdr, 4);
1690         *p = cpu_to_be32(setclientid->sc_prog);
1691         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1692         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1693         p = reserve_space(xdr, 4);
1694         *p = cpu_to_be32(setclientid->sc_cb_ident);
1695 }
1696
1697 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1698 {
1699         encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1700                         decode_setclientid_confirm_maxsz, hdr);
1701         encode_uint64(xdr, arg->clientid);
1702         encode_nfs4_verifier(xdr, &arg->confirm);
1703 }
1704
1705 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1706 {
1707         __be32 *p;
1708
1709         encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1710         encode_nfs4_stateid(xdr, &args->stateid);
1711
1712         p = reserve_space(xdr, 16);
1713         p = xdr_encode_hyper(p, args->offset);
1714         *p++ = cpu_to_be32(args->stable);
1715         *p = cpu_to_be32(args->count);
1716
1717         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1718 }
1719
1720 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1721 {
1722         encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1723         encode_nfs4_stateid(xdr, stateid);
1724 }
1725
1726 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1727 {
1728         encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1729         encode_string(xdr, name->len, name->name);
1730 }
1731
1732 #if defined(CONFIG_NFS_V4_1)
1733 /* NFSv4.1 operations */
1734 static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1735                                    struct nfs4_session *session,
1736                                    struct compound_hdr *hdr)
1737 {
1738         __be32 *p;
1739
1740         encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1741                 decode_bind_conn_to_session_maxsz, hdr);
1742         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1743         p = xdr_reserve_space(xdr, 8);
1744         *p++ = cpu_to_be32(NFS4_CDFC4_BACK_OR_BOTH);
1745         *p = 0; /* use_conn_in_rdma_mode = False */
1746 }
1747
1748 static void encode_exchange_id(struct xdr_stream *xdr,
1749                                struct nfs41_exchange_id_args *args,
1750                                struct compound_hdr *hdr)
1751 {
1752         __be32 *p;
1753         char impl_name[IMPL_NAME_LIMIT];
1754         int len = 0;
1755
1756         encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1757         encode_nfs4_verifier(xdr, args->verifier);
1758
1759         encode_string(xdr, args->id_len, args->id);
1760
1761         p = reserve_space(xdr, 12);
1762         *p++ = cpu_to_be32(args->flags);
1763         *p++ = cpu_to_be32(0);  /* zero length state_protect4_a */
1764
1765         if (send_implementation_id &&
1766             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1767             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1768                 <= sizeof(impl_name) + 1)
1769                 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1770                                utsname()->sysname, utsname()->release,
1771                                utsname()->version, utsname()->machine);
1772
1773         if (len > 0) {
1774                 *p = cpu_to_be32(1);    /* implementation id array length=1 */
1775
1776                 encode_string(xdr,
1777                         sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1778                         CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1779                 encode_string(xdr, len, impl_name);
1780                 /* just send zeros for nii_date - the date is in nii_name */
1781                 p = reserve_space(xdr, 12);
1782                 p = xdr_encode_hyper(p, 0);
1783                 *p = cpu_to_be32(0);
1784         } else
1785                 *p = cpu_to_be32(0);    /* implementation id array length=0 */
1786 }
1787
1788 static void encode_create_session(struct xdr_stream *xdr,
1789                                   struct nfs41_create_session_args *args,
1790                                   struct compound_hdr *hdr)
1791 {
1792         __be32 *p;
1793         char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1794         uint32_t len;
1795         struct nfs_client *clp = args->client;
1796         struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1797         u32 max_resp_sz_cached;
1798
1799         /*
1800          * Assumes OPEN is the biggest non-idempotent compound.
1801          * 2 is the verifier.
1802          */
1803         max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1804                               RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1805
1806         len = scnprintf(machine_name, sizeof(machine_name), "%s",
1807                         clp->cl_ipaddr);
1808
1809         encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1810         p = reserve_space(xdr, 16 + 2*28 + 20 + len + 12);
1811         p = xdr_encode_hyper(p, clp->cl_clientid);
1812         *p++ = cpu_to_be32(clp->cl_seqid);                      /*Sequence id */
1813         *p++ = cpu_to_be32(args->flags);                        /*flags */
1814
1815         /* Fore Channel */
1816         *p++ = cpu_to_be32(0);                          /* header padding size */
1817         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1818         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1819         *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1820         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1821         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1822         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1823
1824         /* Back Channel */
1825         *p++ = cpu_to_be32(0);                          /* header padding size */
1826         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1827         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1828         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1829         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1830         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1831         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1832
1833         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1834         *p++ = cpu_to_be32(1);
1835         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1836
1837         /* authsys_parms rfc1831 */
1838         *p++ = (__be32)nn->boot_time.tv_nsec;           /* stamp */
1839         p = xdr_encode_opaque(p, machine_name, len);
1840         *p++ = cpu_to_be32(0);                          /* UID */
1841         *p++ = cpu_to_be32(0);                          /* GID */
1842         *p = cpu_to_be32(0);                            /* No more gids */
1843 }
1844
1845 static void encode_destroy_session(struct xdr_stream *xdr,
1846                                    struct nfs4_session *session,
1847                                    struct compound_hdr *hdr)
1848 {
1849         encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1850         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1851 }
1852
1853 static void encode_destroy_clientid(struct xdr_stream *xdr,
1854                                    uint64_t clientid,
1855                                    struct compound_hdr *hdr)
1856 {
1857         encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1858         encode_uint64(xdr, clientid);
1859 }
1860
1861 static void encode_reclaim_complete(struct xdr_stream *xdr,
1862                                     struct nfs41_reclaim_complete_args *args,
1863                                     struct compound_hdr *hdr)
1864 {
1865         encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1866         encode_uint32(xdr, args->one_fs);
1867 }
1868 #endif /* CONFIG_NFS_V4_1 */
1869
1870 static void encode_sequence(struct xdr_stream *xdr,
1871                             const struct nfs4_sequence_args *args,
1872                             struct compound_hdr *hdr)
1873 {
1874 #if defined(CONFIG_NFS_V4_1)
1875         struct nfs4_session *session;
1876         struct nfs4_slot_table *tp;
1877         struct nfs4_slot *slot = args->sa_slot;
1878         __be32 *p;
1879
1880         if (slot == NULL)
1881                 return;
1882
1883         tp = slot->table;
1884         session = tp->session;
1885
1886         encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1887
1888         /*
1889          * Sessionid + seqid + slotid + max slotid + cache_this
1890          */
1891         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1892                 "max_slotid=%d cache_this=%d\n",
1893                 __func__,
1894                 ((u32 *)session->sess_id.data)[0],
1895                 ((u32 *)session->sess_id.data)[1],
1896                 ((u32 *)session->sess_id.data)[2],
1897                 ((u32 *)session->sess_id.data)[3],
1898                 slot->seq_nr, slot->slot_nr,
1899                 tp->highest_used_slotid, args->sa_cache_this);
1900         p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1901         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1902         *p++ = cpu_to_be32(slot->seq_nr);
1903         *p++ = cpu_to_be32(slot->slot_nr);
1904         *p++ = cpu_to_be32(tp->highest_used_slotid);
1905         *p = cpu_to_be32(args->sa_cache_this);
1906 #endif /* CONFIG_NFS_V4_1 */
1907 }
1908
1909 #ifdef CONFIG_NFS_V4_1
1910 static void
1911 encode_getdevicelist(struct xdr_stream *xdr,
1912                      const struct nfs4_getdevicelist_args *args,
1913                      struct compound_hdr *hdr)
1914 {
1915         __be32 *p;
1916         nfs4_verifier dummy = {
1917                 .data = "dummmmmy",
1918         };
1919
1920         encode_op_hdr(xdr, OP_GETDEVICELIST, decode_getdevicelist_maxsz, hdr);
1921         p = reserve_space(xdr, 16);
1922         *p++ = cpu_to_be32(args->layoutclass);
1923         *p++ = cpu_to_be32(NFS4_PNFS_GETDEVLIST_MAXNUM);
1924         xdr_encode_hyper(p, 0ULL);                          /* cookie */
1925         encode_nfs4_verifier(xdr, &dummy);
1926 }
1927
1928 static void
1929 encode_getdeviceinfo(struct xdr_stream *xdr,
1930                      const struct nfs4_getdeviceinfo_args *args,
1931                      struct compound_hdr *hdr)
1932 {
1933         __be32 *p;
1934
1935         encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1936         p = reserve_space(xdr, 12 + NFS4_DEVICEID4_SIZE);
1937         p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1938                                     NFS4_DEVICEID4_SIZE);
1939         *p++ = cpu_to_be32(args->pdev->layout_type);
1940         *p++ = cpu_to_be32(args->pdev->maxcount);       /* gdia_maxcount */
1941         *p++ = cpu_to_be32(0);                          /* bitmap length 0 */
1942 }
1943
1944 static void
1945 encode_layoutget(struct xdr_stream *xdr,
1946                       const struct nfs4_layoutget_args *args,
1947                       struct compound_hdr *hdr)
1948 {
1949         __be32 *p;
1950
1951         encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1952         p = reserve_space(xdr, 36);
1953         *p++ = cpu_to_be32(0);     /* Signal layout available */
1954         *p++ = cpu_to_be32(args->type);
1955         *p++ = cpu_to_be32(args->range.iomode);
1956         p = xdr_encode_hyper(p, args->range.offset);
1957         p = xdr_encode_hyper(p, args->range.length);
1958         p = xdr_encode_hyper(p, args->minlength);
1959         encode_nfs4_stateid(xdr, &args->stateid);
1960         encode_uint32(xdr, args->maxcount);
1961
1962         dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1963                 __func__,
1964                 args->type,
1965                 args->range.iomode,
1966                 (unsigned long)args->range.offset,
1967                 (unsigned long)args->range.length,
1968                 args->maxcount);
1969 }
1970
1971 static int
1972 encode_layoutcommit(struct xdr_stream *xdr,
1973                     struct inode *inode,
1974                     const struct nfs4_layoutcommit_args *args,
1975                     struct compound_hdr *hdr)
1976 {
1977         __be32 *p;
1978
1979         dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1980                 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1981
1982         encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
1983         p = reserve_space(xdr, 20);
1984         /* Only whole file layouts */
1985         p = xdr_encode_hyper(p, 0); /* offset */
1986         p = xdr_encode_hyper(p, args->lastbytewritten + 1);     /* length */
1987         *p = cpu_to_be32(0); /* reclaim */
1988         encode_nfs4_stateid(xdr, &args->stateid);
1989         p = reserve_space(xdr, 20);
1990         *p++ = cpu_to_be32(1); /* newoffset = TRUE */
1991         p = xdr_encode_hyper(p, args->lastbytewritten);
1992         *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
1993         *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
1994
1995         if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit)
1996                 NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
1997                         NFS_I(inode)->layout, xdr, args);
1998         else
1999                 encode_uint32(xdr, 0); /* no layout-type payload */
2000
2001         return 0;
2002 }
2003
2004 static void
2005 encode_layoutreturn(struct xdr_stream *xdr,
2006                     const struct nfs4_layoutreturn_args *args,
2007                     struct compound_hdr *hdr)
2008 {
2009         __be32 *p;
2010
2011         encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2012         p = reserve_space(xdr, 16);
2013         *p++ = cpu_to_be32(0);          /* reclaim. always 0 for now */
2014         *p++ = cpu_to_be32(args->layout_type);
2015         *p++ = cpu_to_be32(IOMODE_ANY);
2016         *p = cpu_to_be32(RETURN_FILE);
2017         p = reserve_space(xdr, 16);
2018         p = xdr_encode_hyper(p, 0);
2019         p = xdr_encode_hyper(p, NFS4_MAX_UINT64);
2020         spin_lock(&args->inode->i_lock);
2021         encode_nfs4_stateid(xdr, &args->stateid);
2022         spin_unlock(&args->inode->i_lock);
2023         if (NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn) {
2024                 NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn(
2025                         NFS_I(args->inode)->layout, xdr, args);
2026         } else
2027                 encode_uint32(xdr, 0);
2028 }
2029
2030 static int
2031 encode_secinfo_no_name(struct xdr_stream *xdr,
2032                        const struct nfs41_secinfo_no_name_args *args,
2033                        struct compound_hdr *hdr)
2034 {
2035         encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2036         encode_uint32(xdr, args->style);
2037         return 0;
2038 }
2039
2040 static void encode_test_stateid(struct xdr_stream *xdr,
2041                                 struct nfs41_test_stateid_args *args,
2042                                 struct compound_hdr *hdr)
2043 {
2044         encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2045         encode_uint32(xdr, 1);
2046         encode_nfs4_stateid(xdr, args->stateid);
2047 }
2048
2049 static void encode_free_stateid(struct xdr_stream *xdr,
2050                                 struct nfs41_free_stateid_args *args,
2051                                 struct compound_hdr *hdr)
2052 {
2053         encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2054         encode_nfs4_stateid(xdr, &args->stateid);
2055 }
2056 #endif /* CONFIG_NFS_V4_1 */
2057
2058 /*
2059  * END OF "GENERIC" ENCODE ROUTINES.
2060  */
2061
2062 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2063 {
2064 #if defined(CONFIG_NFS_V4_1)
2065
2066         if (args->sa_slot)
2067                 return args->sa_slot->table->session->clp->cl_mvops->minor_version;
2068 #endif /* CONFIG_NFS_V4_1 */
2069         return 0;
2070 }
2071
2072 /*
2073  * Encode an ACCESS request
2074  */
2075 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2076                                 const struct nfs4_accessargs *args)
2077 {
2078         struct compound_hdr hdr = {
2079                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2080         };
2081
2082         encode_compound_hdr(xdr, req, &hdr);
2083         encode_sequence(xdr, &args->seq_args, &hdr);
2084         encode_putfh(xdr, args->fh, &hdr);
2085         encode_access(xdr, args->access, &hdr);
2086         encode_getfattr(xdr, args->bitmask, &hdr);
2087         encode_nops(&hdr);
2088 }
2089
2090 /*
2091  * Encode LOOKUP request
2092  */
2093 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2094                                 const struct nfs4_lookup_arg *args)
2095 {
2096         struct compound_hdr hdr = {
2097                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2098         };
2099
2100         encode_compound_hdr(xdr, req, &hdr);
2101         encode_sequence(xdr, &args->seq_args, &hdr);
2102         encode_putfh(xdr, args->dir_fh, &hdr);
2103         encode_lookup(xdr, args->name, &hdr);
2104         encode_getfh(xdr, &hdr);
2105         encode_getfattr(xdr, args->bitmask, &hdr);
2106         encode_nops(&hdr);
2107 }
2108
2109 /*
2110  * Encode LOOKUP_ROOT request
2111  */
2112 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2113                                      struct xdr_stream *xdr,
2114                                      const struct nfs4_lookup_root_arg *args)
2115 {
2116         struct compound_hdr hdr = {
2117                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2118         };
2119
2120         encode_compound_hdr(xdr, req, &hdr);
2121         encode_sequence(xdr, &args->seq_args, &hdr);
2122         encode_putrootfh(xdr, &hdr);
2123         encode_getfh(xdr, &hdr);
2124         encode_getfattr(xdr, args->bitmask, &hdr);
2125         encode_nops(&hdr);
2126 }
2127
2128 /*
2129  * Encode REMOVE request
2130  */
2131 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2132                                 const struct nfs_removeargs *args)
2133 {
2134         struct compound_hdr hdr = {
2135                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2136         };
2137
2138         encode_compound_hdr(xdr, req, &hdr);
2139         encode_sequence(xdr, &args->seq_args, &hdr);
2140         encode_putfh(xdr, args->fh, &hdr);
2141         encode_remove(xdr, &args->name, &hdr);
2142         encode_nops(&hdr);
2143 }
2144
2145 /*
2146  * Encode RENAME request
2147  */
2148 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2149                                 const struct nfs_renameargs *args)
2150 {
2151         struct compound_hdr hdr = {
2152                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2153         };
2154
2155         encode_compound_hdr(xdr, req, &hdr);
2156         encode_sequence(xdr, &args->seq_args, &hdr);
2157         encode_putfh(xdr, args->old_dir, &hdr);
2158         encode_savefh(xdr, &hdr);
2159         encode_putfh(xdr, args->new_dir, &hdr);
2160         encode_rename(xdr, args->old_name, args->new_name, &hdr);
2161         encode_nops(&hdr);
2162 }
2163
2164 /*
2165  * Encode LINK request
2166  */
2167 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2168                              const struct nfs4_link_arg *args)
2169 {
2170         struct compound_hdr hdr = {
2171                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2172         };
2173
2174         encode_compound_hdr(xdr, req, &hdr);
2175         encode_sequence(xdr, &args->seq_args, &hdr);
2176         encode_putfh(xdr, args->fh, &hdr);
2177         encode_savefh(xdr, &hdr);
2178         encode_putfh(xdr, args->dir_fh, &hdr);
2179         encode_link(xdr, args->name, &hdr);
2180         encode_restorefh(xdr, &hdr);
2181         encode_getfattr(xdr, args->bitmask, &hdr);
2182         encode_nops(&hdr);
2183 }
2184
2185 /*
2186  * Encode CREATE request
2187  */
2188 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2189                                 const struct nfs4_create_arg *args)
2190 {
2191         struct compound_hdr hdr = {
2192                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2193         };
2194
2195         encode_compound_hdr(xdr, req, &hdr);
2196         encode_sequence(xdr, &args->seq_args, &hdr);
2197         encode_putfh(xdr, args->dir_fh, &hdr);
2198         encode_create(xdr, args, &hdr);
2199         encode_getfh(xdr, &hdr);
2200         encode_getfattr(xdr, args->bitmask, &hdr);
2201         encode_nops(&hdr);
2202 }
2203
2204 /*
2205  * Encode SYMLINK request
2206  */
2207 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2208                                  const struct nfs4_create_arg *args)
2209 {
2210         nfs4_xdr_enc_create(req, xdr, args);
2211 }
2212
2213 /*
2214  * Encode GETATTR request
2215  */
2216 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2217                                  const struct nfs4_getattr_arg *args)
2218 {
2219         struct compound_hdr hdr = {
2220                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2221         };
2222
2223         encode_compound_hdr(xdr, req, &hdr);
2224         encode_sequence(xdr, &args->seq_args, &hdr);
2225         encode_putfh(xdr, args->fh, &hdr);
2226         encode_getfattr(xdr, args->bitmask, &hdr);
2227         encode_nops(&hdr);
2228 }
2229
2230 /*
2231  * Encode a CLOSE request
2232  */
2233 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2234                                struct nfs_closeargs *args)
2235 {
2236         struct compound_hdr hdr = {
2237                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2238         };
2239
2240         encode_compound_hdr(xdr, req, &hdr);
2241         encode_sequence(xdr, &args->seq_args, &hdr);
2242         encode_putfh(xdr, args->fh, &hdr);
2243         encode_close(xdr, args, &hdr);
2244         encode_getfattr(xdr, args->bitmask, &hdr);
2245         encode_nops(&hdr);
2246 }
2247
2248 /*
2249  * Encode an OPEN request
2250  */
2251 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2252                               struct nfs_openargs *args)
2253 {
2254         struct compound_hdr hdr = {
2255                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2256         };
2257
2258         encode_compound_hdr(xdr, req, &hdr);
2259         encode_sequence(xdr, &args->seq_args, &hdr);
2260         encode_putfh(xdr, args->fh, &hdr);
2261         encode_open(xdr, args, &hdr);
2262         encode_getfh(xdr, &hdr);
2263         if (args->access)
2264                 encode_access(xdr, args->access, &hdr);
2265         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2266         encode_nops(&hdr);
2267 }
2268
2269 /*
2270  * Encode an OPEN_CONFIRM request
2271  */
2272 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2273                                       struct xdr_stream *xdr,
2274                                       struct nfs_open_confirmargs *args)
2275 {
2276         struct compound_hdr hdr = {
2277                 .nops   = 0,
2278         };
2279
2280         encode_compound_hdr(xdr, req, &hdr);
2281         encode_putfh(xdr, args->fh, &hdr);
2282         encode_open_confirm(xdr, args, &hdr);
2283         encode_nops(&hdr);
2284 }
2285
2286 /*
2287  * Encode an OPEN request with no attributes.
2288  */
2289 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2290                                      struct xdr_stream *xdr,
2291                                      struct nfs_openargs *args)
2292 {
2293         struct compound_hdr hdr = {
2294                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2295         };
2296
2297         encode_compound_hdr(xdr, req, &hdr);
2298         encode_sequence(xdr, &args->seq_args, &hdr);
2299         encode_putfh(xdr, args->fh, &hdr);
2300         encode_open(xdr, args, &hdr);
2301         if (args->access)
2302                 encode_access(xdr, args->access, &hdr);
2303         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2304         encode_nops(&hdr);
2305 }
2306
2307 /*
2308  * Encode an OPEN_DOWNGRADE request
2309  */
2310 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2311                                         struct xdr_stream *xdr,
2312                                         struct nfs_closeargs *args)
2313 {
2314         struct compound_hdr hdr = {
2315                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2316         };
2317
2318         encode_compound_hdr(xdr, req, &hdr);
2319         encode_sequence(xdr, &args->seq_args, &hdr);
2320         encode_putfh(xdr, args->fh, &hdr);
2321         encode_open_downgrade(xdr, args, &hdr);
2322         encode_getfattr(xdr, args->bitmask, &hdr);
2323         encode_nops(&hdr);
2324 }
2325
2326 /*
2327  * Encode a LOCK request
2328  */
2329 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2330                               struct nfs_lock_args *args)
2331 {
2332         struct compound_hdr hdr = {
2333                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2334         };
2335
2336         encode_compound_hdr(xdr, req, &hdr);
2337         encode_sequence(xdr, &args->seq_args, &hdr);
2338         encode_putfh(xdr, args->fh, &hdr);
2339         encode_lock(xdr, args, &hdr);
2340         encode_nops(&hdr);
2341 }
2342
2343 /*
2344  * Encode a LOCKT request
2345  */
2346 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2347                                struct nfs_lockt_args *args)
2348 {
2349         struct compound_hdr hdr = {
2350                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2351         };
2352
2353         encode_compound_hdr(xdr, req, &hdr);
2354         encode_sequence(xdr, &args->seq_args, &hdr);
2355         encode_putfh(xdr, args->fh, &hdr);
2356         encode_lockt(xdr, args, &hdr);
2357         encode_nops(&hdr);
2358 }
2359
2360 /*
2361  * Encode a LOCKU request
2362  */
2363 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2364                                struct nfs_locku_args *args)
2365 {
2366         struct compound_hdr hdr = {
2367                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2368         };
2369
2370         encode_compound_hdr(xdr, req, &hdr);
2371         encode_sequence(xdr, &args->seq_args, &hdr);
2372         encode_putfh(xdr, args->fh, &hdr);
2373         encode_locku(xdr, args, &hdr);
2374         encode_nops(&hdr);
2375 }
2376
2377 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2378                                            struct xdr_stream *xdr,
2379                                         struct nfs_release_lockowner_args *args)
2380 {
2381         struct compound_hdr hdr = {
2382                 .minorversion = 0,
2383         };
2384
2385         encode_compound_hdr(xdr, req, &hdr);
2386         encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2387         encode_nops(&hdr);
2388 }
2389
2390 /*
2391  * Encode a READLINK request
2392  */
2393 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2394                                   const struct nfs4_readlink *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_readlink(xdr, args, req, &hdr);
2404
2405         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2406                         args->pgbase, args->pglen);
2407         encode_nops(&hdr);
2408 }
2409
2410 /*
2411  * Encode a READDIR request
2412  */
2413 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2414                                  const struct nfs4_readdir_arg *args)
2415 {
2416         struct compound_hdr hdr = {
2417                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2418         };
2419
2420         encode_compound_hdr(xdr, req, &hdr);
2421         encode_sequence(xdr, &args->seq_args, &hdr);
2422         encode_putfh(xdr, args->fh, &hdr);
2423         encode_readdir(xdr, args, req, &hdr);
2424
2425         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2426                          args->pgbase, args->count);
2427         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2428                         __func__, hdr.replen << 2, args->pages,
2429                         args->pgbase, args->count);
2430         encode_nops(&hdr);
2431 }
2432
2433 /*
2434  * Encode a READ request
2435  */
2436 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2437                               struct nfs_readargs *args)
2438 {
2439         struct compound_hdr hdr = {
2440                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2441         };
2442
2443         encode_compound_hdr(xdr, req, &hdr);
2444         encode_sequence(xdr, &args->seq_args, &hdr);
2445         encode_putfh(xdr, args->fh, &hdr);
2446         encode_read(xdr, args, &hdr);
2447
2448         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2449                          args->pages, args->pgbase, args->count);
2450         req->rq_rcv_buf.flags |= XDRBUF_READ;
2451         encode_nops(&hdr);
2452 }
2453
2454 /*
2455  * Encode an SETATTR request
2456  */
2457 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2458                                  struct nfs_setattrargs *args)
2459 {
2460         struct compound_hdr hdr = {
2461                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2462         };
2463
2464         encode_compound_hdr(xdr, req, &hdr);
2465         encode_sequence(xdr, &args->seq_args, &hdr);
2466         encode_putfh(xdr, args->fh, &hdr);
2467         encode_setattr(xdr, args, args->server, &hdr);
2468         encode_getfattr(xdr, args->bitmask, &hdr);
2469         encode_nops(&hdr);
2470 }
2471
2472 /*
2473  * Encode a GETACL request
2474  */
2475 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2476                                 struct nfs_getaclargs *args)
2477 {
2478         struct compound_hdr hdr = {
2479                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2480         };
2481         uint32_t replen;
2482
2483         encode_compound_hdr(xdr, req, &hdr);
2484         encode_sequence(xdr, &args->seq_args, &hdr);
2485         encode_putfh(xdr, args->fh, &hdr);
2486         replen = hdr.replen + op_decode_hdr_maxsz + 1;
2487         encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2488
2489         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2490                 args->acl_pages, args->acl_pgbase, args->acl_len);
2491
2492         encode_nops(&hdr);
2493 }
2494
2495 /*
2496  * Encode a WRITE request
2497  */
2498 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2499                                struct nfs_writeargs *args)
2500 {
2501         struct compound_hdr hdr = {
2502                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2503         };
2504
2505         encode_compound_hdr(xdr, req, &hdr);
2506         encode_sequence(xdr, &args->seq_args, &hdr);
2507         encode_putfh(xdr, args->fh, &hdr);
2508         encode_write(xdr, args, &hdr);
2509         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2510         if (args->bitmask)
2511                 encode_getfattr(xdr, args->bitmask, &hdr);
2512         encode_nops(&hdr);
2513 }
2514
2515 /*
2516  *  a COMMIT request
2517  */
2518 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2519                                 struct nfs_commitargs *args)
2520 {
2521         struct compound_hdr hdr = {
2522                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2523         };
2524
2525         encode_compound_hdr(xdr, req, &hdr);
2526         encode_sequence(xdr, &args->seq_args, &hdr);
2527         encode_putfh(xdr, args->fh, &hdr);
2528         encode_commit(xdr, args, &hdr);
2529         encode_nops(&hdr);
2530 }
2531
2532 /*
2533  * FSINFO request
2534  */
2535 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2536                                 struct nfs4_fsinfo_arg *args)
2537 {
2538         struct compound_hdr hdr = {
2539                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2540         };
2541
2542         encode_compound_hdr(xdr, req, &hdr);
2543         encode_sequence(xdr, &args->seq_args, &hdr);
2544         encode_putfh(xdr, args->fh, &hdr);
2545         encode_fsinfo(xdr, args->bitmask, &hdr);
2546         encode_nops(&hdr);
2547 }
2548
2549 /*
2550  * a PATHCONF request
2551  */
2552 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2553                                   const struct nfs4_pathconf_arg *args)
2554 {
2555         struct compound_hdr hdr = {
2556                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2557         };
2558
2559         encode_compound_hdr(xdr, req, &hdr);
2560         encode_sequence(xdr, &args->seq_args, &hdr);
2561         encode_putfh(xdr, args->fh, &hdr);
2562         encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2563                            &hdr);
2564         encode_nops(&hdr);
2565 }
2566
2567 /*
2568  * a STATFS request
2569  */
2570 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2571                                 const struct nfs4_statfs_arg *args)
2572 {
2573         struct compound_hdr hdr = {
2574                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2575         };
2576
2577         encode_compound_hdr(xdr, req, &hdr);
2578         encode_sequence(xdr, &args->seq_args, &hdr);
2579         encode_putfh(xdr, args->fh, &hdr);
2580         encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2581                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2582         encode_nops(&hdr);
2583 }
2584
2585 /*
2586  * GETATTR_BITMAP request
2587  */
2588 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2589                                      struct xdr_stream *xdr,
2590                                      struct nfs4_server_caps_arg *args)
2591 {
2592         struct compound_hdr hdr = {
2593                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2594         };
2595
2596         encode_compound_hdr(xdr, req, &hdr);
2597         encode_sequence(xdr, &args->seq_args, &hdr);
2598         encode_putfh(xdr, args->fhandle, &hdr);
2599         encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2600                            FATTR4_WORD0_FH_EXPIRE_TYPE|
2601                            FATTR4_WORD0_LINK_SUPPORT|
2602                            FATTR4_WORD0_SYMLINK_SUPPORT|
2603                            FATTR4_WORD0_ACLSUPPORT, &hdr);
2604         encode_nops(&hdr);
2605 }
2606
2607 /*
2608  * a RENEW request
2609  */
2610 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2611                                struct nfs_client *clp)
2612 {
2613         struct compound_hdr hdr = {
2614                 .nops   = 0,
2615         };
2616
2617         encode_compound_hdr(xdr, req, &hdr);
2618         encode_renew(xdr, clp->cl_clientid, &hdr);
2619         encode_nops(&hdr);
2620 }
2621
2622 /*
2623  * a SETCLIENTID request
2624  */
2625 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2626                                      struct xdr_stream *xdr,
2627                                      struct nfs4_setclientid *sc)
2628 {
2629         struct compound_hdr hdr = {
2630                 .nops   = 0,
2631         };
2632
2633         encode_compound_hdr(xdr, req, &hdr);
2634         encode_setclientid(xdr, sc, &hdr);
2635         encode_nops(&hdr);
2636 }
2637
2638 /*
2639  * a SETCLIENTID_CONFIRM request
2640  */
2641 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2642                                              struct xdr_stream *xdr,
2643                                              struct nfs4_setclientid_res *arg)
2644 {
2645         struct compound_hdr hdr = {
2646                 .nops   = 0,
2647         };
2648
2649         encode_compound_hdr(xdr, req, &hdr);
2650         encode_setclientid_confirm(xdr, arg, &hdr);
2651         encode_nops(&hdr);
2652 }
2653
2654 /*
2655  * DELEGRETURN request
2656  */
2657 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2658                                      struct xdr_stream *xdr,
2659                                      const struct nfs4_delegreturnargs *args)
2660 {
2661         struct compound_hdr hdr = {
2662                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2663         };
2664
2665         encode_compound_hdr(xdr, req, &hdr);
2666         encode_sequence(xdr, &args->seq_args, &hdr);
2667         encode_putfh(xdr, args->fhandle, &hdr);
2668         encode_getfattr(xdr, args->bitmask, &hdr);
2669         encode_delegreturn(xdr, args->stateid, &hdr);
2670         encode_nops(&hdr);
2671 }
2672
2673 /*
2674  * Encode FS_LOCATIONS request
2675  */
2676 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2677                                       struct xdr_stream *xdr,
2678                                       struct nfs4_fs_locations_arg *args)
2679 {
2680         struct compound_hdr hdr = {
2681                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2682         };
2683         uint32_t replen;
2684
2685         encode_compound_hdr(xdr, req, &hdr);
2686         encode_sequence(xdr, &args->seq_args, &hdr);
2687         encode_putfh(xdr, args->dir_fh, &hdr);
2688         encode_lookup(xdr, args->name, &hdr);
2689         replen = hdr.replen;    /* get the attribute into args->page */
2690         encode_fs_locations(xdr, args->bitmask, &hdr);
2691
2692         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2693                         0, PAGE_SIZE);
2694         encode_nops(&hdr);
2695 }
2696
2697 /*
2698  * Encode SECINFO request
2699  */
2700 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2701                                 struct xdr_stream *xdr,
2702                                 struct nfs4_secinfo_arg *args)
2703 {
2704         struct compound_hdr hdr = {
2705                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2706         };
2707
2708         encode_compound_hdr(xdr, req, &hdr);
2709         encode_sequence(xdr, &args->seq_args, &hdr);
2710         encode_putfh(xdr, args->dir_fh, &hdr);
2711         encode_secinfo(xdr, args->name, &hdr);
2712         encode_nops(&hdr);
2713 }
2714
2715 #if defined(CONFIG_NFS_V4_1)
2716 /*
2717  * BIND_CONN_TO_SESSION request
2718  */
2719 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2720                                 struct xdr_stream *xdr,
2721                                 struct nfs_client *clp)
2722 {
2723         struct compound_hdr hdr = {
2724                 .minorversion = clp->cl_mvops->minor_version,
2725         };
2726
2727         encode_compound_hdr(xdr, req, &hdr);
2728         encode_bind_conn_to_session(xdr, clp->cl_session, &hdr);
2729         encode_nops(&hdr);
2730 }
2731
2732 /*
2733  * EXCHANGE_ID request
2734  */
2735 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2736                                      struct xdr_stream *xdr,
2737                                      struct nfs41_exchange_id_args *args)
2738 {
2739         struct compound_hdr hdr = {
2740                 .minorversion = args->client->cl_mvops->minor_version,
2741         };
2742
2743         encode_compound_hdr(xdr, req, &hdr);
2744         encode_exchange_id(xdr, args, &hdr);
2745         encode_nops(&hdr);
2746 }
2747
2748 /*
2749  * a CREATE_SESSION request
2750  */
2751 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2752                                         struct xdr_stream *xdr,
2753                                         struct nfs41_create_session_args *args)
2754 {
2755         struct compound_hdr hdr = {
2756                 .minorversion = args->client->cl_mvops->minor_version,
2757         };
2758
2759         encode_compound_hdr(xdr, req, &hdr);
2760         encode_create_session(xdr, args, &hdr);
2761         encode_nops(&hdr);
2762 }
2763
2764 /*
2765  * a DESTROY_SESSION request
2766  */
2767 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2768                                          struct xdr_stream *xdr,
2769                                          struct nfs4_session *session)
2770 {
2771         struct compound_hdr hdr = {
2772                 .minorversion = session->clp->cl_mvops->minor_version,
2773         };
2774
2775         encode_compound_hdr(xdr, req, &hdr);
2776         encode_destroy_session(xdr, session, &hdr);
2777         encode_nops(&hdr);
2778 }
2779
2780 /*
2781  * a DESTROY_CLIENTID request
2782  */
2783 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2784                                          struct xdr_stream *xdr,
2785                                          struct nfs_client *clp)
2786 {
2787         struct compound_hdr hdr = {
2788                 .minorversion = clp->cl_mvops->minor_version,
2789         };
2790
2791         encode_compound_hdr(xdr, req, &hdr);
2792         encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2793         encode_nops(&hdr);
2794 }
2795
2796 /*
2797  * a SEQUENCE request
2798  */
2799 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2800                                   struct nfs4_sequence_args *args)
2801 {
2802         struct compound_hdr hdr = {
2803                 .minorversion = nfs4_xdr_minorversion(args),
2804         };
2805
2806         encode_compound_hdr(xdr, req, &hdr);
2807         encode_sequence(xdr, args, &hdr);
2808         encode_nops(&hdr);
2809 }
2810
2811 /*
2812  * a GET_LEASE_TIME request
2813  */
2814 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2815                                         struct xdr_stream *xdr,
2816                                         struct nfs4_get_lease_time_args *args)
2817 {
2818         struct compound_hdr hdr = {
2819                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2820         };
2821         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2822
2823         encode_compound_hdr(xdr, req, &hdr);
2824         encode_sequence(xdr, &args->la_seq_args, &hdr);
2825         encode_putrootfh(xdr, &hdr);
2826         encode_fsinfo(xdr, lease_bitmap, &hdr);
2827         encode_nops(&hdr);
2828 }
2829
2830 /*
2831  * a RECLAIM_COMPLETE request
2832  */
2833 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2834                                           struct xdr_stream *xdr,
2835                                 struct nfs41_reclaim_complete_args *args)
2836 {
2837         struct compound_hdr hdr = {
2838                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2839         };
2840
2841         encode_compound_hdr(xdr, req, &hdr);
2842         encode_sequence(xdr, &args->seq_args, &hdr);
2843         encode_reclaim_complete(xdr, args, &hdr);
2844         encode_nops(&hdr);
2845 }
2846
2847 /*
2848  * Encode GETDEVICELIST request
2849  */
2850 static void nfs4_xdr_enc_getdevicelist(struct rpc_rqst *req,
2851                                        struct xdr_stream *xdr,
2852                                        struct nfs4_getdevicelist_args *args)
2853 {
2854         struct compound_hdr hdr = {
2855                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2856         };
2857
2858         encode_compound_hdr(xdr, req, &hdr);
2859         encode_sequence(xdr, &args->seq_args, &hdr);
2860         encode_putfh(xdr, args->fh, &hdr);
2861         encode_getdevicelist(xdr, args, &hdr);
2862         encode_nops(&hdr);
2863 }
2864
2865 /*
2866  * Encode GETDEVICEINFO request
2867  */
2868 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2869                                        struct xdr_stream *xdr,
2870                                        struct nfs4_getdeviceinfo_args *args)
2871 {
2872         struct compound_hdr hdr = {
2873                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2874         };
2875
2876         encode_compound_hdr(xdr, req, &hdr);
2877         encode_sequence(xdr, &args->seq_args, &hdr);
2878         encode_getdeviceinfo(xdr, args, &hdr);
2879
2880         /* set up reply kvec. Subtract notification bitmap max size (2)
2881          * so that notification bitmap is put in xdr_buf tail */
2882         xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2883                          args->pdev->pages, args->pdev->pgbase,
2884                          args->pdev->pglen);
2885
2886         encode_nops(&hdr);
2887 }
2888
2889 /*
2890  *  Encode LAYOUTGET request
2891  */
2892 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2893                                    struct xdr_stream *xdr,
2894                                    struct nfs4_layoutget_args *args)
2895 {
2896         struct compound_hdr hdr = {
2897                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2898         };
2899
2900         encode_compound_hdr(xdr, req, &hdr);
2901         encode_sequence(xdr, &args->seq_args, &hdr);
2902         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2903         encode_layoutget(xdr, args, &hdr);
2904
2905         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2906             args->layout.pages, 0, args->layout.pglen);
2907
2908         encode_nops(&hdr);
2909 }
2910
2911 /*
2912  *  Encode LAYOUTCOMMIT request
2913  */
2914 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2915                                       struct xdr_stream *xdr,
2916                                       struct nfs4_layoutcommit_args *args)
2917 {
2918         struct nfs4_layoutcommit_data *data =
2919                 container_of(args, struct nfs4_layoutcommit_data, args);
2920         struct compound_hdr hdr = {
2921                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2922         };
2923
2924         encode_compound_hdr(xdr, req, &hdr);
2925         encode_sequence(xdr, &args->seq_args, &hdr);
2926         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2927         encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2928         encode_getfattr(xdr, args->bitmask, &hdr);
2929         encode_nops(&hdr);
2930 }
2931
2932 /*
2933  * Encode LAYOUTRETURN request
2934  */
2935 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2936                                       struct xdr_stream *xdr,
2937                                       struct nfs4_layoutreturn_args *args)
2938 {
2939         struct compound_hdr hdr = {
2940                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2941         };
2942
2943         encode_compound_hdr(xdr, req, &hdr);
2944         encode_sequence(xdr, &args->seq_args, &hdr);
2945         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2946         encode_layoutreturn(xdr, args, &hdr);
2947         encode_nops(&hdr);
2948 }
2949
2950 /*
2951  * Encode SECINFO_NO_NAME request
2952  */
2953 static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
2954                                         struct xdr_stream *xdr,
2955                                         struct nfs41_secinfo_no_name_args *args)
2956 {
2957         struct compound_hdr hdr = {
2958                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2959         };
2960
2961         encode_compound_hdr(xdr, req, &hdr);
2962         encode_sequence(xdr, &args->seq_args, &hdr);
2963         encode_putrootfh(xdr, &hdr);
2964         encode_secinfo_no_name(xdr, args, &hdr);
2965         encode_nops(&hdr);
2966         return 0;
2967 }
2968
2969 /*
2970  *  Encode TEST_STATEID request
2971  */
2972 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
2973                                       struct xdr_stream *xdr,
2974                                       struct nfs41_test_stateid_args *args)
2975 {
2976         struct compound_hdr hdr = {
2977                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2978         };
2979
2980         encode_compound_hdr(xdr, req, &hdr);
2981         encode_sequence(xdr, &args->seq_args, &hdr);
2982         encode_test_stateid(xdr, args, &hdr);
2983         encode_nops(&hdr);
2984 }
2985
2986 /*
2987  *  Encode FREE_STATEID request
2988  */
2989 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
2990                                      struct xdr_stream *xdr,
2991                                      struct nfs41_free_stateid_args *args)
2992 {
2993         struct compound_hdr hdr = {
2994                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2995         };
2996
2997         encode_compound_hdr(xdr, req, &hdr);
2998         encode_sequence(xdr, &args->seq_args, &hdr);
2999         encode_free_stateid(xdr, args, &hdr);
3000         encode_nops(&hdr);
3001 }
3002 #endif /* CONFIG_NFS_V4_1 */
3003
3004 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
3005 {
3006         dprintk("nfs: %s: prematurely hit end of receive buffer. "
3007                 "Remaining buffer length is %tu words.\n",
3008                 func, xdr->end - xdr->p);
3009 }
3010
3011 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3012 {
3013         __be32 *p;
3014
3015         p = xdr_inline_decode(xdr, 4);
3016         if (unlikely(!p))
3017                 goto out_overflow;
3018         *len = be32_to_cpup(p);
3019         p = xdr_inline_decode(xdr, *len);
3020         if (unlikely(!p))
3021                 goto out_overflow;
3022         *string = (char *)p;
3023         return 0;
3024 out_overflow:
3025         print_overflow_msg(__func__, xdr);
3026         return -EIO;
3027 }
3028
3029 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3030 {
3031         __be32 *p;
3032
3033         p = xdr_inline_decode(xdr, 8);
3034         if (unlikely(!p))
3035                 goto out_overflow;
3036         hdr->status = be32_to_cpup(p++);
3037         hdr->taglen = be32_to_cpup(p);
3038
3039         p = xdr_inline_decode(xdr, hdr->taglen + 4);
3040         if (unlikely(!p))
3041                 goto out_overflow;
3042         hdr->tag = (char *)p;
3043         p += XDR_QUADLEN(hdr->taglen);
3044         hdr->nops = be32_to_cpup(p);
3045         if (unlikely(hdr->nops < 1))
3046                 return nfs4_stat_to_errno(hdr->status);
3047         return 0;
3048 out_overflow:
3049         print_overflow_msg(__func__, xdr);
3050         return -EIO;
3051 }
3052
3053 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3054 {
3055         __be32 *p;
3056         uint32_t opnum;
3057         int32_t nfserr;
3058
3059         p = xdr_inline_decode(xdr, 8);
3060         if (unlikely(!p))
3061                 goto out_overflow;
3062         opnum = be32_to_cpup(p++);
3063         if (opnum != expected) {
3064                 dprintk("nfs: Server returned operation"
3065                         " %d but we issued a request for %d\n",
3066                                 opnum, expected);
3067                 return -EIO;
3068         }
3069         nfserr = be32_to_cpup(p);
3070         if (nfserr != NFS_OK)
3071                 return nfs4_stat_to_errno(nfserr);
3072         return 0;
3073 out_overflow:
3074         print_overflow_msg(__func__, xdr);
3075         return -EIO;
3076 }
3077
3078 /* Dummy routine */
3079 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
3080 {
3081         __be32 *p;
3082         unsigned int strlen;
3083         char *str;
3084
3085         p = xdr_inline_decode(xdr, 12);
3086         if (likely(p))
3087                 return decode_opaque_inline(xdr, &strlen, &str);
3088         print_overflow_msg(__func__, xdr);
3089         return -EIO;
3090 }
3091
3092 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3093 {
3094         uint32_t bmlen;
3095         __be32 *p;
3096
3097         p = xdr_inline_decode(xdr, 4);
3098         if (unlikely(!p))
3099                 goto out_overflow;
3100         bmlen = be32_to_cpup(p);
3101
3102         bitmap[0] = bitmap[1] = bitmap[2] = 0;
3103         p = xdr_inline_decode(xdr, (bmlen << 2));
3104         if (unlikely(!p))
3105                 goto out_overflow;
3106         if (bmlen > 0) {
3107                 bitmap[0] = be32_to_cpup(p++);
3108                 if (bmlen > 1) {
3109                         bitmap[1] = be32_to_cpup(p++);
3110                         if (bmlen > 2)
3111                                 bitmap[2] = be32_to_cpup(p);
3112                 }
3113         }
3114         return 0;
3115 out_overflow:
3116         print_overflow_msg(__func__, xdr);
3117         return -EIO;
3118 }
3119
3120 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3121 {
3122         __be32 *p;
3123
3124         p = xdr_inline_decode(xdr, 4);
3125         if (unlikely(!p))
3126                 goto out_overflow;
3127         *attrlen = be32_to_cpup(p);
3128         *savep = xdr_stream_pos(xdr);
3129         return 0;
3130 out_overflow:
3131         print_overflow_msg(__func__, xdr);
3132         return -EIO;
3133 }
3134
3135 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3136 {
3137         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3138                 int ret;
3139                 ret = decode_attr_bitmap(xdr, bitmask);
3140                 if (unlikely(ret < 0))
3141                         return ret;
3142                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3143         } else
3144                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3145         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3146                 bitmask[0], bitmask[1], bitmask[2]);
3147         return 0;
3148 }
3149
3150 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3151 {
3152         __be32 *p;
3153         int ret = 0;
3154
3155         *type = 0;
3156         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3157                 return -EIO;
3158         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3159                 p = xdr_inline_decode(xdr, 4);
3160                 if (unlikely(!p))
3161                         goto out_overflow;
3162                 *type = be32_to_cpup(p);
3163                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3164                         dprintk("%s: bad type %d\n", __func__, *type);
3165                         return -EIO;
3166                 }
3167                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3168                 ret = NFS_ATTR_FATTR_TYPE;
3169         }
3170         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3171         return ret;
3172 out_overflow:
3173         print_overflow_msg(__func__, xdr);
3174         return -EIO;
3175 }
3176
3177 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3178                                       uint32_t *bitmap, uint32_t *type)
3179 {
3180         __be32 *p;
3181
3182         *type = 0;
3183         if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3184                 return -EIO;
3185         if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3186                 p = xdr_inline_decode(xdr, 4);
3187                 if (unlikely(!p))
3188                         goto out_overflow;
3189                 *type = be32_to_cpup(p);
3190                 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3191         }
3192         dprintk("%s: expire type=0x%x\n", __func__, *type);
3193         return 0;
3194 out_overflow:
3195         print_overflow_msg(__func__, xdr);
3196         return -EIO;
3197 }
3198
3199 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3200 {
3201         __be32 *p;
3202         int ret = 0;
3203
3204         *change = 0;
3205         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3206                 return -EIO;
3207         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3208                 p = xdr_inline_decode(xdr, 8);
3209                 if (unlikely(!p))
3210                         goto out_overflow;
3211                 xdr_decode_hyper(p, change);
3212                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3213                 ret = NFS_ATTR_FATTR_CHANGE;
3214         }
3215         dprintk("%s: change attribute=%Lu\n", __func__,
3216                         (unsigned long long)*change);
3217         return ret;
3218 out_overflow:
3219         print_overflow_msg(__func__, xdr);
3220         return -EIO;
3221 }
3222
3223 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3224 {
3225         __be32 *p;
3226         int ret = 0;
3227
3228         *size = 0;
3229         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3230                 return -EIO;
3231         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3232                 p = xdr_inline_decode(xdr, 8);
3233                 if (unlikely(!p))
3234                         goto out_overflow;
3235                 xdr_decode_hyper(p, size);
3236                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3237                 ret = NFS_ATTR_FATTR_SIZE;
3238         }
3239         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3240         return ret;
3241 out_overflow:
3242         print_overflow_msg(__func__, xdr);
3243         return -EIO;
3244 }
3245
3246 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3247 {
3248         __be32 *p;
3249
3250         *res = 0;
3251         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3252                 return -EIO;
3253         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3254                 p = xdr_inline_decode(xdr, 4);
3255                 if (unlikely(!p))
3256                         goto out_overflow;
3257                 *res = be32_to_cpup(p);
3258                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3259         }
3260         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3261         return 0;
3262 out_overflow:
3263         print_overflow_msg(__func__, xdr);
3264         return -EIO;
3265 }
3266
3267 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3268 {
3269         __be32 *p;
3270
3271         *res = 0;
3272         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3273                 return -EIO;
3274         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3275                 p = xdr_inline_decode(xdr, 4);
3276                 if (unlikely(!p))
3277                         goto out_overflow;
3278                 *res = be32_to_cpup(p);
3279                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3280         }
3281         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3282         return 0;
3283 out_overflow:
3284         print_overflow_msg(__func__, xdr);
3285         return -EIO;
3286 }
3287
3288 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3289 {
3290         __be32 *p;
3291         int ret = 0;
3292
3293         fsid->major = 0;
3294         fsid->minor = 0;
3295         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3296                 return -EIO;
3297         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3298                 p = xdr_inline_decode(xdr, 16);
3299                 if (unlikely(!p))
3300                         goto out_overflow;
3301                 p = xdr_decode_hyper(p, &fsid->major);
3302                 xdr_decode_hyper(p, &fsid->minor);
3303                 bitmap[0] &= ~FATTR4_WORD0_FSID;
3304                 ret = NFS_ATTR_FATTR_FSID;
3305         }
3306         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3307                         (unsigned long long)fsid->major,
3308                         (unsigned long long)fsid->minor);
3309         return ret;
3310 out_overflow:
3311         print_overflow_msg(__func__, xdr);
3312         return -EIO;
3313 }
3314
3315 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3316 {
3317         __be32 *p;
3318
3319         *res = 60;
3320         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3321                 return -EIO;
3322         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3323                 p = xdr_inline_decode(xdr, 4);
3324                 if (unlikely(!p))
3325                         goto out_overflow;
3326                 *res = be32_to_cpup(p);
3327                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3328         }
3329         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3330         return 0;
3331 out_overflow:
3332         print_overflow_msg(__func__, xdr);
3333         return -EIO;
3334 }
3335
3336 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3337 {
3338         __be32 *p;
3339
3340         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3341                 return -EIO;
3342         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3343                 p = xdr_inline_decode(xdr, 4);
3344                 if (unlikely(!p))
3345                         goto out_overflow;
3346                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3347                 *res = -be32_to_cpup(p);
3348         }
3349         return 0;
3350 out_overflow:
3351         print_overflow_msg(__func__, xdr);
3352         return -EIO;
3353 }
3354
3355 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3356 {
3357         __be32 *p;
3358         int len;
3359
3360         if (fh != NULL)
3361                 memset(fh, 0, sizeof(*fh));
3362
3363         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3364                 return -EIO;
3365         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3366                 p = xdr_inline_decode(xdr, 4);
3367                 if (unlikely(!p))
3368                         goto out_overflow;
3369                 len = be32_to_cpup(p);
3370                 if (len > NFS4_FHSIZE)
3371                         return -EIO;
3372                 p = xdr_inline_decode(xdr, len);
3373                 if (unlikely(!p))
3374                         goto out_overflow;
3375                 if (fh != NULL) {
3376                         memcpy(fh->data, p, len);
3377                         fh->size = len;
3378                 }
3379                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3380         }
3381         return 0;
3382 out_overflow:
3383         print_overflow_msg(__func__, xdr);
3384         return -EIO;
3385 }
3386
3387 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3388 {
3389         __be32 *p;
3390
3391         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
3392         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3393                 return -EIO;
3394         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3395                 p = xdr_inline_decode(xdr, 4);
3396                 if (unlikely(!p))
3397                         goto out_overflow;
3398                 *res = be32_to_cpup(p);
3399                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3400         }
3401         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3402         return 0;
3403 out_overflow:
3404         print_overflow_msg(__func__, xdr);
3405         return -EIO;
3406 }
3407
3408 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3409 {
3410         __be32 *p;
3411         int ret = 0;
3412
3413         *fileid = 0;
3414         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3415                 return -EIO;
3416         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3417                 p = xdr_inline_decode(xdr, 8);
3418                 if (unlikely(!p))
3419                         goto out_overflow;
3420                 xdr_decode_hyper(p, fileid);
3421                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3422                 ret = NFS_ATTR_FATTR_FILEID;
3423         }
3424         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3425         return ret;
3426 out_overflow:
3427         print_overflow_msg(__func__, xdr);
3428         return -EIO;
3429 }
3430
3431 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3432 {
3433         __be32 *p;
3434         int ret = 0;
3435
3436         *fileid = 0;
3437         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3438                 return -EIO;
3439         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3440                 p = xdr_inline_decode(xdr, 8);
3441                 if (unlikely(!p))
3442                         goto out_overflow;
3443                 xdr_decode_hyper(p, fileid);
3444                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3445                 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3446         }
3447         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3448         return ret;
3449 out_overflow:
3450         print_overflow_msg(__func__, xdr);
3451         return -EIO;
3452 }
3453
3454 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3455 {
3456         __be32 *p;
3457         int status = 0;
3458
3459         *res = 0;
3460         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3461                 return -EIO;
3462         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3463                 p = xdr_inline_decode(xdr, 8);
3464                 if (unlikely(!p))
3465                         goto out_overflow;
3466                 xdr_decode_hyper(p, res);
3467                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3468         }
3469         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3470         return status;
3471 out_overflow:
3472         print_overflow_msg(__func__, xdr);
3473         return -EIO;
3474 }
3475
3476 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3477 {
3478         __be32 *p;
3479         int status = 0;
3480
3481         *res = 0;
3482         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3483                 return -EIO;
3484         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3485                 p = xdr_inline_decode(xdr, 8);
3486                 if (unlikely(!p))
3487                         goto out_overflow;
3488                 xdr_decode_hyper(p, res);
3489                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3490         }
3491         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3492         return status;
3493 out_overflow:
3494         print_overflow_msg(__func__, xdr);
3495         return -EIO;
3496 }
3497
3498 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3499 {
3500         __be32 *p;
3501         int status = 0;
3502
3503         *res = 0;
3504         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3505                 return -EIO;
3506         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3507                 p = xdr_inline_decode(xdr, 8);
3508                 if (unlikely(!p))
3509                         goto out_overflow;
3510                 xdr_decode_hyper(p, res);
3511                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3512         }
3513         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3514         return status;
3515 out_overflow:
3516         print_overflow_msg(__func__, xdr);
3517         return -EIO;
3518 }
3519
3520 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3521 {
3522         u32 n;
3523         __be32 *p;
3524         int status = 0;
3525
3526         p = xdr_inline_decode(xdr, 4);
3527         if (unlikely(!p))
3528                 goto out_overflow;
3529         n = be32_to_cpup(p);
3530         if (n == 0)
3531                 goto root_path;
3532         dprintk("pathname4: ");
3533         if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3534                 dprintk("cannot parse %d components in path\n", n);
3535                 goto out_eio;
3536         }
3537         for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3538                 struct nfs4_string *component = &path->components[path->ncomponents];
3539                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3540                 if (unlikely(status != 0))
3541                         goto out_eio;
3542                 ifdebug (XDR)
3543                         pr_cont("%s%.*s ",
3544                                 (path->ncomponents != n ? "/ " : ""),
3545                                 component->len, component->data);
3546         }
3547 out:
3548         return status;
3549 root_path:
3550 /* a root pathname is sent as a zero component4 */
3551         path->ncomponents = 1;
3552         path->components[0].len=0;
3553         path->components[0].data=NULL;
3554         dprintk("pathname4: /\n");
3555         goto out;
3556 out_eio:
3557         dprintk(" status %d", status);
3558         status = -EIO;
3559         goto out;
3560 out_overflow:
3561         print_overflow_msg(__func__, xdr);
3562         return -EIO;
3563 }
3564
3565 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3566 {
3567         int n;
3568         __be32 *p;
3569         int status = -EIO;
3570
3571         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3572                 goto out;
3573         status = 0;
3574         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3575                 goto out;
3576         status = -EIO;
3577         /* Ignore borken servers that return unrequested attrs */
3578         if (unlikely(res == NULL))
3579                 goto out;
3580         dprintk("%s: fsroot:\n", __func__);
3581         status = decode_pathname(xdr, &res->fs_path);
3582         if (unlikely(status != 0))
3583                 goto out;
3584         p = xdr_inline_decode(xdr, 4);
3585         if (unlikely(!p))
3586                 goto out_overflow;
3587         n = be32_to_cpup(p);
3588         if (n <= 0)
3589                 goto out_eio;
3590         for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3591                 u32 m;
3592                 struct nfs4_fs_location *loc;
3593
3594                 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3595                         break;
3596                 loc = &res->locations[res->nlocations];
3597                 p = xdr_inline_decode(xdr, 4);
3598                 if (unlikely(!p))
3599                         goto out_overflow;
3600                 m = be32_to_cpup(p);
3601
3602                 dprintk("%s: servers:\n", __func__);
3603                 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3604                         struct nfs4_string *server;
3605
3606                         if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3607                                 unsigned int i;
3608                                 dprintk("%s: using first %u of %u servers "
3609                                         "returned for location %u\n",
3610                                                 __func__,
3611                                                 NFS4_FS_LOCATION_MAXSERVERS,
3612                                                 m, res->nlocations);
3613                                 for (i = loc->nservers; i < m; i++) {
3614                                         unsigned int len;
3615                                         char *data;
3616                                         status = decode_opaque_inline(xdr, &len, &data);
3617                                         if (unlikely(status != 0))
3618                                                 goto out_eio;
3619                                 }
3620                                 break;
3621                         }
3622                         server = &loc->servers[loc->nservers];
3623                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3624                         if (unlikely(status != 0))
3625                                 goto out_eio;
3626                         dprintk("%s ", server->data);
3627                 }
3628                 status = decode_pathname(xdr, &loc->rootpath);
3629                 if (unlikely(status != 0))
3630                         goto out_eio;
3631         }
3632         if (res->nlocations != 0)
3633                 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3634 out:
3635         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3636         return status;
3637 out_overflow:
3638         print_overflow_msg(__func__, xdr);
3639 out_eio:
3640         status = -EIO;
3641         goto out;
3642 }
3643
3644 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3645 {
3646         __be32 *p;
3647         int status = 0;
3648
3649         *res = 0;
3650         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3651                 return -EIO;
3652         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3653                 p = xdr_inline_decode(xdr, 8);
3654                 if (unlikely(!p))
3655                         goto out_overflow;
3656                 xdr_decode_hyper(p, res);
3657                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3658         }
3659         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3660         return status;
3661 out_overflow:
3662         print_overflow_msg(__func__, xdr);
3663         return -EIO;
3664 }
3665
3666 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3667 {
3668         __be32 *p;
3669         int status = 0;
3670
3671         *maxlink = 1;
3672         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3673                 return -EIO;
3674         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3675                 p = xdr_inline_decode(xdr, 4);
3676                 if (unlikely(!p))
3677                         goto out_overflow;
3678                 *maxlink = be32_to_cpup(p);
3679                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3680         }
3681         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3682         return status;
3683 out_overflow:
3684         print_overflow_msg(__func__, xdr);
3685         return -EIO;
3686 }
3687
3688 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3689 {
3690         __be32 *p;
3691         int status = 0;
3692
3693         *maxname = 1024;
3694         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3695                 return -EIO;
3696         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3697                 p = xdr_inline_decode(xdr, 4);
3698                 if (unlikely(!p))
3699                         goto out_overflow;
3700                 *maxname = be32_to_cpup(p);
3701                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3702         }
3703         dprintk("%s: maxname=%u\n", __func__, *maxname);
3704         return status;
3705 out_overflow:
3706         print_overflow_msg(__func__, xdr);
3707         return -EIO;
3708 }
3709
3710 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3711 {
3712         __be32 *p;
3713         int status = 0;
3714
3715         *res = 1024;
3716         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3717                 return -EIO;
3718         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3719                 uint64_t maxread;
3720                 p = xdr_inline_decode(xdr, 8);
3721                 if (unlikely(!p))
3722                         goto out_overflow;
3723                 xdr_decode_hyper(p, &maxread);
3724                 if (maxread > 0x7FFFFFFF)
3725                         maxread = 0x7FFFFFFF;
3726                 *res = (uint32_t)maxread;
3727                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3728         }
3729         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3730         return status;
3731 out_overflow:
3732         print_overflow_msg(__func__, xdr);
3733         return -EIO;
3734 }
3735
3736 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3737 {
3738         __be32 *p;
3739         int status = 0;
3740
3741         *res = 1024;
3742         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3743                 return -EIO;
3744         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3745                 uint64_t maxwrite;
3746                 p = xdr_inline_decode(xdr, 8);
3747                 if (unlikely(!p))
3748                         goto out_overflow;
3749                 xdr_decode_hyper(p, &maxwrite);
3750                 if (maxwrite > 0x7FFFFFFF)
3751                         maxwrite = 0x7FFFFFFF;
3752                 *res = (uint32_t)maxwrite;
3753                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3754         }
3755         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3756         return status;
3757 out_overflow:
3758         print_overflow_msg(__func__, xdr);
3759         return -EIO;
3760 }
3761
3762 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3763 {
3764         uint32_t tmp;
3765         __be32 *p;
3766         int ret = 0;
3767
3768         *mode = 0;
3769         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3770                 return -EIO;
3771         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3772                 p = xdr_inline_decode(xdr, 4);
3773                 if (unlikely(!p))
3774                         goto out_overflow;
3775                 tmp = be32_to_cpup(p);
3776                 *mode = tmp & ~S_IFMT;
3777                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3778                 ret = NFS_ATTR_FATTR_MODE;
3779         }
3780         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3781         return ret;
3782 out_overflow:
3783         print_overflow_msg(__func__, xdr);
3784         return -EIO;
3785 }
3786
3787 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3788 {
3789         __be32 *p;
3790         int ret = 0;
3791
3792         *nlink = 1;
3793         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3794                 return -EIO;
3795         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3796                 p = xdr_inline_decode(xdr, 4);
3797                 if (unlikely(!p))
3798                         goto out_overflow;
3799                 *nlink = be32_to_cpup(p);
3800                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3801                 ret = NFS_ATTR_FATTR_NLINK;
3802         }
3803         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3804         return ret;
3805 out_overflow:
3806         print_overflow_msg(__func__, xdr);
3807         return -EIO;
3808 }
3809
3810 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3811                 const struct nfs_server *server, kuid_t *uid,
3812                 struct nfs4_string *owner_name)
3813 {
3814         uint32_t len;
3815         __be32 *p;
3816         int ret = 0;
3817
3818         *uid = make_kuid(&init_user_ns, -2);
3819         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3820                 return -EIO;
3821         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3822                 p = xdr_inline_decode(xdr, 4);
3823                 if (unlikely(!p))
3824                         goto out_overflow;
3825                 len = be32_to_cpup(p);
3826                 p = xdr_inline_decode(xdr, len);
3827                 if (unlikely(!p))
3828                         goto out_overflow;
3829                 if (owner_name != NULL) {
3830                         owner_name->data = kmemdup(p, len, GFP_NOWAIT);
3831                         if (owner_name->data != NULL) {
3832                                 owner_name->len = len;
3833                                 ret = NFS_ATTR_FATTR_OWNER_NAME;
3834                         }
3835                 } else if (len < XDR_MAX_NETOBJ) {
3836                         if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3837                                 ret = NFS_ATTR_FATTR_OWNER;
3838                         else
3839                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3840                                                 __func__);
3841                 } else
3842                         dprintk("%s: name too long (%u)!\n",
3843                                         __func__, len);
3844                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3845         }
3846         dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3847         return ret;
3848 out_overflow:
3849         print_overflow_msg(__func__, xdr);
3850         return -EIO;
3851 }
3852
3853 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3854                 const struct nfs_server *server, kgid_t *gid,
3855                 struct nfs4_string *group_name)
3856 {
3857         uint32_t len;
3858         __be32 *p;
3859         int ret = 0;
3860
3861         *gid = make_kgid(&init_user_ns, -2);
3862         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3863                 return -EIO;
3864         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3865                 p = xdr_inline_decode(xdr, 4);
3866                 if (unlikely(!p))
3867                         goto out_overflow;
3868                 len = be32_to_cpup(p);
3869                 p = xdr_inline_decode(xdr, len);
3870                 if (unlikely(!p))
3871                         goto out_overflow;
3872                 if (group_name != NULL) {
3873                         group_name->data = kmemdup(p, len, GFP_NOWAIT);
3874                         if (group_name->data != NULL) {
3875                                 group_name->len = len;
3876                                 ret = NFS_ATTR_FATTR_GROUP_NAME;
3877                         }
3878                 } else if (len < XDR_MAX_NETOBJ) {
3879                         if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3880                                 ret = NFS_ATTR_FATTR_GROUP;
3881                         else
3882                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3883                                                 __func__);
3884                 } else
3885                         dprintk("%s: name too long (%u)!\n",
3886                                         __func__, len);
3887                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3888         }
3889         dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3890         return ret;
3891 out_overflow:
3892         print_overflow_msg(__func__, xdr);
3893         return -EIO;
3894 }
3895
3896 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3897 {
3898         uint32_t major = 0, minor = 0;
3899         __be32 *p;
3900         int ret = 0;
3901
3902         *rdev = MKDEV(0,0);
3903         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3904                 return -EIO;
3905         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3906                 dev_t tmp;
3907
3908                 p = xdr_inline_decode(xdr, 8);
3909                 if (unlikely(!p))
3910                         goto out_overflow;
3911                 major = be32_to_cpup(p++);
3912                 minor = be32_to_cpup(p);
3913                 tmp = MKDEV(major, minor);
3914                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3915                         *rdev = tmp;
3916                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3917                 ret = NFS_ATTR_FATTR_RDEV;
3918         }
3919         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3920         return ret;
3921 out_overflow:
3922         print_overflow_msg(__func__, xdr);
3923         return -EIO;
3924 }
3925
3926 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3927 {
3928         __be32 *p;
3929         int status = 0;
3930
3931         *res = 0;
3932         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3933                 return -EIO;
3934         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3935                 p = xdr_inline_decode(xdr, 8);
3936                 if (unlikely(!p))
3937                         goto out_overflow;
3938                 xdr_decode_hyper(p, res);
3939                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3940         }
3941         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3942         return status;
3943 out_overflow:
3944         print_overflow_msg(__func__, xdr);
3945         return -EIO;
3946 }
3947
3948 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3949 {
3950         __be32 *p;
3951         int status = 0;
3952
3953         *res = 0;
3954         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3955                 return -EIO;
3956         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3957                 p = xdr_inline_decode(xdr, 8);
3958                 if (unlikely(!p))
3959                         goto out_overflow;
3960                 xdr_decode_hyper(p, res);
3961                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3962         }
3963         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3964         return status;
3965 out_overflow:
3966         print_overflow_msg(__func__, xdr);
3967         return -EIO;
3968 }
3969
3970 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3971 {
3972         __be32 *p;
3973         int status = 0;
3974
3975         *res = 0;
3976         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3977                 return -EIO;
3978         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3979                 p = xdr_inline_decode(xdr, 8);
3980                 if (unlikely(!p))
3981                         goto out_overflow;
3982                 xdr_decode_hyper(p, res);
3983                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3984         }
3985         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3986         return status;
3987 out_overflow:
3988         print_overflow_msg(__func__, xdr);
3989         return -EIO;
3990 }
3991
3992 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3993 {
3994         __be32 *p;
3995         int ret = 0;
3996
3997         *used = 0;
3998         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3999                 return -EIO;
4000         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4001                 p = xdr_inline_decode(xdr, 8);
4002                 if (unlikely(!p))
4003                         goto out_overflow;
4004                 xdr_decode_hyper(p, used);
4005                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4006                 ret = NFS_ATTR_FATTR_SPACE_USED;
4007         }
4008         dprintk("%s: space used=%Lu\n", __func__,
4009                         (unsigned long long)*used);
4010         return ret;
4011 out_overflow:
4012         print_overflow_msg(__func__, xdr);
4013         return -EIO;
4014 }
4015
4016 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
4017 {
4018         __be32 *p;
4019         uint64_t sec;
4020         uint32_t nsec;
4021
4022         p = xdr_inline_decode(xdr, 12);
4023         if (unlikely(!p))
4024                 goto out_overflow;
4025         p = xdr_decode_hyper(p, &sec);
4026         nsec = be32_to_cpup(p);
4027         time->tv_sec = (time_t)sec;
4028         time->tv_nsec = (long)nsec;
4029         return 0;
4030 out_overflow:
4031         print_overflow_msg(__func__, xdr);
4032         return -EIO;
4033 }
4034
4035 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, 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_ACCESS - 1U)))
4042                 return -EIO;
4043         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4044                 status = decode_attr_time(xdr, time);
4045                 if (status == 0)
4046                         status = NFS_ATTR_FATTR_ATIME;
4047                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4048         }
4049         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4050         return status;
4051 }
4052
4053 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4054 {
4055         int status = 0;
4056
4057         time->tv_sec = 0;
4058         time->tv_nsec = 0;
4059         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4060                 return -EIO;
4061         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4062                 status = decode_attr_time(xdr, time);
4063                 if (status == 0)
4064                         status = NFS_ATTR_FATTR_CTIME;
4065                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4066         }
4067         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4068         return status;
4069 }
4070
4071 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4072                                   struct timespec *time)
4073 {
4074         int status = 0;
4075
4076         time->tv_sec = 0;
4077         time->tv_nsec = 0;
4078         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4079                 return -EIO;
4080         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4081                 status = decode_attr_time(xdr, time);
4082                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4083         }
4084         dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4085                 (long)time->tv_nsec);
4086         return status;
4087 }
4088
4089 static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4090                                         struct nfs4_label *label)
4091 {
4092         uint32_t pi = 0;
4093         uint32_t lfs = 0;
4094         __u32 len;
4095         __be32 *p;
4096         int status = 0;
4097
4098         if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4099                 return -EIO;
4100         if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4101                 p = xdr_inline_decode(xdr, 4);
4102                 if (unlikely(!p))
4103                         goto out_overflow;
4104                 lfs = be32_to_cpup(p++);
4105                 p = xdr_inline_decode(xdr, 4);
4106                 if (unlikely(!p))
4107                         goto out_overflow;
4108                 pi = be32_to_cpup(p++);
4109                 p = xdr_inline_decode(xdr, 4);
4110                 if (unlikely(!p))
4111                         goto out_overflow;
4112                 len = be32_to_cpup(p++);
4113                 p = xdr_inline_decode(xdr, len);
4114                 if (unlikely(!p))
4115                         goto out_overflow;
4116                 if (len < NFS4_MAXLABELLEN) {
4117                         if (label) {
4118                                 memcpy(label->label, p, len);
4119                                 label->len = len;
4120                                 label->pi = pi;
4121                                 label->lfs = lfs;
4122                                 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4123                         }
4124                         bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4125                 } else
4126                         printk(KERN_WARNING "%s: label too long (%u)!\n",
4127                                         __func__, len);
4128         }
4129         if (label && label->label)
4130                 dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4131                         (char *)label->label, label->len, label->pi, label->lfs);
4132         return status;
4133
4134 out_overflow:
4135         print_overflow_msg(__func__, xdr);
4136         return -EIO;
4137 }
4138
4139 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4140 {
4141         int status = 0;
4142
4143         time->tv_sec = 0;
4144         time->tv_nsec = 0;
4145         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4146                 return -EIO;
4147         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4148                 status = decode_attr_time(xdr, time);
4149                 if (status == 0)
4150                         status = NFS_ATTR_FATTR_MTIME;
4151                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4152         }
4153         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4154         return status;
4155 }
4156
4157 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4158 {
4159         unsigned int attrwords = XDR_QUADLEN(attrlen);
4160         unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4161
4162         if (unlikely(attrwords != nwords)) {
4163                 dprintk("%s: server returned incorrect attribute length: "
4164                         "%u %c %u\n",
4165                                 __func__,
4166                                 attrwords << 2,
4167                                 (attrwords < nwords) ? '<' : '>',
4168                                 nwords << 2);
4169                 return -EIO;
4170         }
4171         return 0;
4172 }
4173
4174 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4175 {
4176         __be32 *p;
4177
4178         p = xdr_inline_decode(xdr, 20);
4179         if (unlikely(!p))
4180                 goto out_overflow;
4181         cinfo->atomic = be32_to_cpup(p++);
4182         p = xdr_decode_hyper(p, &cinfo->before);
4183         xdr_decode_hyper(p, &cinfo->after);
4184         return 0;
4185 out_overflow:
4186         print_overflow_msg(__func__, xdr);
4187         return -EIO;
4188 }
4189
4190 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4191 {
4192         __be32 *p;
4193         uint32_t supp, acc;
4194         int status;
4195
4196         status = decode_op_hdr(xdr, OP_ACCESS);
4197         if (status)
4198                 return status;
4199         p = xdr_inline_decode(xdr, 8);
4200         if (unlikely(!p))
4201                 goto out_overflow;
4202         supp = be32_to_cpup(p++);
4203         acc = be32_to_cpup(p);
4204         *supported = supp;
4205         *access = acc;
4206         return 0;
4207 out_overflow:
4208         print_overflow_msg(__func__, xdr);
4209         return -EIO;
4210 }
4211
4212 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4213 {
4214         __be32 *p;
4215
4216         p = xdr_inline_decode(xdr, len);
4217         if (likely(p)) {
4218                 memcpy(buf, p, len);
4219                 return 0;
4220         }
4221         print_overflow_msg(__func__, xdr);
4222         return -EIO;
4223 }
4224
4225 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4226 {
4227         return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4228 }
4229
4230 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4231 {
4232         int status;
4233
4234         status = decode_op_hdr(xdr, OP_CLOSE);
4235         if (status != -EIO)
4236                 nfs_increment_open_seqid(status, res->seqid);
4237         if (!status)
4238                 status = decode_stateid(xdr, &res->stateid);
4239         return status;
4240 }
4241
4242 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4243 {
4244         return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4245 }
4246
4247 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4248 {
4249         return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4250 }
4251
4252 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4253 {
4254         int status;
4255
4256         status = decode_op_hdr(xdr, OP_COMMIT);
4257         if (!status)
4258                 status = decode_write_verifier(xdr, &res->verf->verifier);
4259         return status;
4260 }
4261
4262 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4263 {
4264         __be32 *p;
4265         uint32_t bmlen;
4266         int status;
4267
4268         status = decode_op_hdr(xdr, OP_CREATE);
4269         if (status)
4270                 return status;
4271         if ((status = decode_change_info(xdr, cinfo)))
4272                 return status;
4273         p = xdr_inline_decode(xdr, 4);
4274         if (unlikely(!p))
4275                 goto out_overflow;
4276         bmlen = be32_to_cpup(p);
4277         p = xdr_inline_decode(xdr, bmlen << 2);
4278         if (likely(p))
4279                 return 0;
4280 out_overflow:
4281         print_overflow_msg(__func__, xdr);
4282         return -EIO;
4283 }
4284
4285 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4286 {
4287         unsigned int savep;
4288         uint32_t attrlen, bitmap[3] = {0};
4289         int status;
4290
4291         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4292                 goto xdr_error;
4293         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4294                 goto xdr_error;
4295         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4296                 goto xdr_error;
4297         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4298                 goto xdr_error;
4299         if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4300                                                  &res->fh_expire_type)) != 0)
4301                 goto xdr_error;
4302         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4303                 goto xdr_error;
4304         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4305                 goto xdr_error;
4306         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4307                 goto xdr_error;
4308         status = verify_attr_len(xdr, savep, attrlen);
4309 xdr_error:
4310         dprintk("%s: xdr returned %d!\n", __func__, -status);
4311         return status;
4312 }
4313
4314 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4315 {
4316         unsigned int savep;
4317         uint32_t attrlen, bitmap[3] = {0};
4318         int status;
4319
4320         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4321                 goto xdr_error;
4322         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4323                 goto xdr_error;
4324         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4325                 goto xdr_error;
4326
4327         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4328                 goto xdr_error;
4329         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4330                 goto xdr_error;
4331         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4332                 goto xdr_error;
4333         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4334                 goto xdr_error;
4335         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4336                 goto xdr_error;
4337         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4338                 goto xdr_error;
4339
4340         status = verify_attr_len(xdr, savep, attrlen);
4341 xdr_error:
4342         dprintk("%s: xdr returned %d!\n", __func__, -status);
4343         return status;
4344 }
4345
4346 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4347 {
4348         unsigned int savep;
4349         uint32_t attrlen, bitmap[3] = {0};
4350         int status;
4351
4352         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4353                 goto xdr_error;
4354         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4355                 goto xdr_error;
4356         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4357                 goto xdr_error;
4358
4359         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4360                 goto xdr_error;
4361         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4362                 goto xdr_error;
4363
4364         status = verify_attr_len(xdr, savep, attrlen);
4365 xdr_error:
4366         dprintk("%s: xdr returned %d!\n", __func__, -status);
4367         return status;
4368 }
4369
4370 static int decode_threshold_hint(struct xdr_stream *xdr,
4371                                   uint32_t *bitmap,
4372                                   uint64_t *res,
4373                                   uint32_t hint_bit)
4374 {
4375         __be32 *p;
4376
4377         *res = 0;
4378         if (likely(bitmap[0] & hint_bit)) {
4379                 p = xdr_inline_decode(xdr, 8);
4380                 if (unlikely(!p))
4381                         goto out_overflow;
4382                 xdr_decode_hyper(p, res);
4383         }
4384         return 0;
4385 out_overflow:
4386         print_overflow_msg(__func__, xdr);
4387         return -EIO;
4388 }
4389
4390 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4391                                         struct nfs4_threshold *res)
4392 {
4393         __be32 *p;
4394         unsigned int savep;
4395         uint32_t bitmap[3] = {0,}, attrlen;
4396         int status;
4397
4398         /* layout type */
4399         p = xdr_inline_decode(xdr, 4);
4400         if (unlikely(!p)) {
4401                 print_overflow_msg(__func__, xdr);
4402                 return -EIO;
4403         }
4404         res->l_type = be32_to_cpup(p);
4405
4406         /* thi_hintset bitmap */
4407         status = decode_attr_bitmap(xdr, bitmap);
4408         if (status < 0)
4409                 goto xdr_error;
4410
4411         /* thi_hintlist length */
4412         status = decode_attr_length(xdr, &attrlen, &savep);
4413         if (status < 0)
4414                 goto xdr_error;
4415         /* thi_hintlist */
4416         status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4417         if (status < 0)
4418                 goto xdr_error;
4419         status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4420         if (status < 0)
4421                 goto xdr_error;
4422         status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4423                                        THRESHOLD_RD_IO);
4424         if (status < 0)
4425                 goto xdr_error;
4426         status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4427                                        THRESHOLD_WR_IO);
4428         if (status < 0)
4429                 goto xdr_error;
4430
4431         status = verify_attr_len(xdr, savep, attrlen);
4432         res->bm = bitmap[0];
4433
4434         dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4435                  __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4436                 res->wr_io_sz);
4437 xdr_error:
4438         dprintk("%s ret=%d!\n", __func__, status);
4439         return status;
4440 }
4441
4442 /*
4443  * Thresholds on pNFS direct I/O vrs MDS I/O
4444  */
4445 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4446                                     uint32_t *bitmap,
4447                                     struct nfs4_threshold *res)
4448 {
4449         __be32 *p;
4450         int status = 0;
4451         uint32_t num;
4452
4453         if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4454                 return -EIO;
4455         if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4456                 /* Did the server return an unrequested attribute? */
4457                 if (unlikely(res == NULL))
4458                         return -EREMOTEIO;
4459                 p = xdr_inline_decode(xdr, 4);
4460                 if (unlikely(!p))
4461                         goto out_overflow;
4462                 num = be32_to_cpup(p);
4463                 if (num == 0)
4464                         return 0;
4465                 if (num > 1)
4466                         printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4467                                 "drivers per filesystem not supported\n",
4468                                 __func__);
4469
4470                 status = decode_first_threshold_item4(xdr, res);
4471                 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4472         }
4473         return status;
4474 out_overflow:
4475         print_overflow_msg(__func__, xdr);
4476         return -EIO;
4477 }
4478
4479 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4480                 struct nfs_fattr *fattr, struct nfs_fh *fh,
4481                 struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4482                 const struct nfs_server *server)
4483 {
4484         int status;
4485         umode_t fmode = 0;
4486         uint32_t type;
4487         int32_t err;
4488
4489         status = decode_attr_type(xdr, bitmap, &type);
4490         if (status < 0)
4491                 goto xdr_error;
4492         fattr->mode = 0;
4493         if (status != 0) {
4494                 fattr->mode |= nfs_type2fmt[type];
4495                 fattr->valid |= status;
4496         }
4497
4498         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4499         if (status < 0)
4500                 goto xdr_error;
4501         fattr->valid |= status;
4502
4503         status = decode_attr_size(xdr, bitmap, &fattr->size);
4504         if (status < 0)
4505                 goto xdr_error;
4506         fattr->valid |= status;
4507
4508         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4509         if (status < 0)
4510                 goto xdr_error;
4511         fattr->valid |= status;
4512
4513         err = 0;
4514         status = decode_attr_error(xdr, bitmap, &err);
4515         if (status < 0)
4516                 goto xdr_error;
4517
4518         status = decode_attr_filehandle(xdr, bitmap, fh);
4519         if (status < 0)
4520                 goto xdr_error;
4521
4522         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4523         if (status < 0)
4524                 goto xdr_error;
4525         fattr->valid |= status;
4526
4527         status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4528         if (status < 0)
4529                 goto xdr_error;
4530         fattr->valid |= status;
4531
4532         status = decode_attr_mode(xdr, bitmap, &fmode);
4533         if (status < 0)
4534                 goto xdr_error;
4535         if (status != 0) {
4536                 fattr->mode |= fmode;
4537                 fattr->valid |= status;
4538         }
4539
4540         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4541         if (status < 0)
4542                 goto xdr_error;
4543         fattr->valid |= status;
4544
4545         status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4546         if (status < 0)
4547                 goto xdr_error;
4548         fattr->valid |= status;
4549
4550         status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4551         if (status < 0)
4552                 goto xdr_error;
4553         fattr->valid |= status;
4554
4555         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4556         if (status < 0)
4557                 goto xdr_error;
4558         fattr->valid |= status;
4559
4560         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4561         if (status < 0)
4562                 goto xdr_error;
4563         fattr->valid |= status;
4564
4565         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4566         if (status < 0)
4567                 goto xdr_error;
4568         fattr->valid |= status;
4569
4570         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4571         if (status < 0)
4572                 goto xdr_error;
4573         fattr->valid |= status;
4574
4575         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4576         if (status < 0)
4577                 goto xdr_error;
4578         fattr->valid |= status;
4579
4580         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4581         if (status < 0)
4582                 goto xdr_error;
4583         fattr->valid |= status;
4584
4585         status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4586         if (status < 0)
4587                 goto xdr_error;
4588
4589         if (label) {
4590                 status = decode_attr_security_label(xdr, bitmap, label);
4591                 if (status < 0)
4592                         goto xdr_error;
4593                 fattr->valid |= status;
4594         }
4595
4596 xdr_error:
4597         dprintk("%s: xdr returned %d\n", __func__, -status);
4598         return status;
4599 }
4600
4601 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4602                 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4603                 struct nfs4_label *label, const struct nfs_server *server)
4604 {
4605         unsigned int savep;
4606         uint32_t attrlen,
4607                  bitmap[3] = {0};
4608         int status;
4609
4610         status = decode_op_hdr(xdr, OP_GETATTR);
4611         if (status < 0)
4612                 goto xdr_error;
4613
4614         status = decode_attr_bitmap(xdr, bitmap);
4615         if (status < 0)
4616                 goto xdr_error;
4617
4618         status = decode_attr_length(xdr, &attrlen, &savep);
4619         if (status < 0)
4620                 goto xdr_error;
4621
4622         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4623                                         label, server);
4624         if (status < 0)
4625                 goto xdr_error;
4626
4627         status = verify_attr_len(xdr, savep, attrlen);
4628 xdr_error:
4629         dprintk("%s: xdr returned %d\n", __func__, -status);
4630         return status;
4631 }
4632
4633 static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4634                 struct nfs4_label *label, const struct nfs_server *server)
4635 {
4636         return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4637 }
4638
4639 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4640                 const struct nfs_server *server)
4641 {
4642         return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4643 }
4644
4645 /*
4646  * Decode potentially multiple layout types. Currently we only support
4647  * one layout driver per file system.
4648  */
4649 static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4650                                          uint32_t *layouttype)
4651 {
4652         uint32_t *p;
4653         int num;
4654
4655         p = xdr_inline_decode(xdr, 4);
4656         if (unlikely(!p))
4657                 goto out_overflow;
4658         num = be32_to_cpup(p);
4659
4660         /* pNFS is not supported by the underlying file system */
4661         if (num == 0) {
4662                 *layouttype = 0;
4663                 return 0;
4664         }
4665         if (num > 1)
4666                 printk(KERN_INFO "NFS: %s: Warning: Multiple pNFS layout "
4667                         "drivers per filesystem not supported\n", __func__);
4668
4669         /* Decode and set first layout type, move xdr->p past unused types */
4670         p = xdr_inline_decode(xdr, num * 4);
4671         if (unlikely(!p))
4672                 goto out_overflow;
4673         *layouttype = be32_to_cpup(p);
4674         return 0;
4675 out_overflow:
4676         print_overflow_msg(__func__, xdr);
4677         return -EIO;
4678 }
4679
4680 /*
4681  * The type of file system exported.
4682  * Note we must ensure that layouttype is set in any non-error case.
4683  */
4684 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4685                                 uint32_t *layouttype)
4686 {
4687         int status = 0;
4688
4689         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4690         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4691                 return -EIO;
4692         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4693                 status = decode_first_pnfs_layout_type(xdr, layouttype);
4694                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4695         } else
4696                 *layouttype = 0;
4697         return status;
4698 }
4699
4700 /*
4701  * The prefered block size for layout directed io
4702  */
4703 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4704                                       uint32_t *res)
4705 {
4706         __be32 *p;
4707
4708         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4709         *res = 0;
4710         if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4711                 p = xdr_inline_decode(xdr, 4);
4712                 if (unlikely(!p)) {
4713                         print_overflow_msg(__func__, xdr);
4714                         return -EIO;
4715                 }
4716                 *res = be32_to_cpup(p);
4717                 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4718         }
4719         return 0;
4720 }
4721
4722 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4723 {
4724         unsigned int savep;
4725         uint32_t attrlen, bitmap[3];
4726         int status;
4727
4728         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4729                 goto xdr_error;
4730         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4731                 goto xdr_error;
4732         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4733                 goto xdr_error;
4734
4735         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4736
4737         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4738                 goto xdr_error;
4739         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4740                 goto xdr_error;
4741         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4742                 goto xdr_error;
4743         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4744         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4745                 goto xdr_error;
4746         fsinfo->wtpref = fsinfo->wtmax;
4747         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4748         if (status != 0)
4749                 goto xdr_error;
4750         status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4751         if (status != 0)
4752                 goto xdr_error;
4753         status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4754         if (status)
4755                 goto xdr_error;
4756
4757         status = verify_attr_len(xdr, savep, attrlen);
4758 xdr_error:
4759         dprintk("%s: xdr returned %d!\n", __func__, -status);
4760         return status;
4761 }
4762
4763 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4764 {
4765         __be32 *p;
4766         uint32_t len;
4767         int status;
4768
4769         /* Zero handle first to allow comparisons */
4770         memset(fh, 0, sizeof(*fh));
4771
4772         status = decode_op_hdr(xdr, OP_GETFH);
4773         if (status)
4774                 return status;
4775
4776         p = xdr_inline_decode(xdr, 4);
4777         if (unlikely(!p))
4778                 goto out_overflow;
4779         len = be32_to_cpup(p);
4780         if (len > NFS4_FHSIZE)
4781                 return -EIO;
4782         fh->size = len;
4783         p = xdr_inline_decode(xdr, len);
4784         if (unlikely(!p))
4785                 goto out_overflow;
4786         memcpy(fh->data, p, len);
4787         return 0;
4788 out_overflow:
4789         print_overflow_msg(__func__, xdr);
4790         return -EIO;
4791 }
4792
4793 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4794 {
4795         int status;
4796
4797         status = decode_op_hdr(xdr, OP_LINK);
4798         if (status)
4799                 return status;
4800         return decode_change_info(xdr, cinfo);
4801 }
4802
4803 /*
4804  * We create the owner, so we know a proper owner.id length is 4.
4805  */
4806 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4807 {
4808         uint64_t offset, length, clientid;
4809         __be32 *p;
4810         uint32_t namelen, type;
4811
4812         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4813         if (unlikely(!p))
4814                 goto out_overflow;
4815         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4816         p = xdr_decode_hyper(p, &length);
4817         type = be32_to_cpup(p++); /* 4 byte read */
4818         if (fl != NULL) { /* manipulate file lock */
4819                 fl->fl_start = (loff_t)offset;
4820                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4821                 if (length == ~(uint64_t)0)
4822                         fl->fl_end = OFFSET_MAX;
4823                 fl->fl_type = F_WRLCK;
4824                 if (type & 1)
4825                         fl->fl_type = F_RDLCK;
4826                 fl->fl_pid = 0;
4827         }
4828         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4829         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4830         p = xdr_inline_decode(xdr, namelen); /* variable size field */
4831         if (likely(p))
4832                 return -NFS4ERR_DENIED;
4833 out_overflow:
4834         print_overflow_msg(__func__, xdr);
4835         return -EIO;
4836 }
4837
4838 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4839 {
4840         int status;
4841
4842         status = decode_op_hdr(xdr, OP_LOCK);
4843         if (status == -EIO)
4844                 goto out;
4845         if (status == 0) {
4846                 status = decode_stateid(xdr, &res->stateid);
4847                 if (unlikely(status))
4848                         goto out;
4849         } else if (status == -NFS4ERR_DENIED)
4850                 status = decode_lock_denied(xdr, NULL);
4851         if (res->open_seqid != NULL)
4852                 nfs_increment_open_seqid(status, res->open_seqid);
4853         nfs_increment_lock_seqid(status, res->lock_seqid);
4854 out:
4855         return status;
4856 }
4857
4858 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4859 {
4860         int status;
4861         status = decode_op_hdr(xdr, OP_LOCKT);
4862         if (status == -NFS4ERR_DENIED)
4863                 return decode_lock_denied(xdr, res->denied);
4864         return status;
4865 }
4866
4867 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4868 {
4869         int status;
4870
4871         status = decode_op_hdr(xdr, OP_LOCKU);
4872         if (status != -EIO)
4873                 nfs_increment_lock_seqid(status, res->seqid);
4874         if (status == 0)
4875                 status = decode_stateid(xdr, &res->stateid);
4876         return status;
4877 }
4878
4879 static int decode_release_lockowner(struct xdr_stream *xdr)
4880 {
4881         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4882 }
4883
4884 static int decode_lookup(struct xdr_stream *xdr)
4885 {
4886         return decode_op_hdr(xdr, OP_LOOKUP);
4887 }
4888
4889 /* This is too sick! */
4890 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4891 {
4892         __be32 *p;
4893         uint32_t limit_type, nblocks, blocksize;
4894
4895         p = xdr_inline_decode(xdr, 12);
4896         if (unlikely(!p))
4897                 goto out_overflow;
4898         limit_type = be32_to_cpup(p++);
4899         switch (limit_type) {
4900         case 1:
4901                 xdr_decode_hyper(p, maxsize);
4902                 break;
4903         case 2:
4904                 nblocks = be32_to_cpup(p++);
4905                 blocksize = be32_to_cpup(p);
4906                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4907         }
4908         return 0;
4909 out_overflow:
4910         print_overflow_msg(__func__, xdr);
4911         return -EIO;
4912 }
4913
4914 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4915 {
4916         __be32 *p;
4917         uint32_t delegation_type;
4918         int status;
4919
4920         p = xdr_inline_decode(xdr, 4);
4921         if (unlikely(!p))
4922                 goto out_overflow;
4923         delegation_type = be32_to_cpup(p);
4924         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4925                 res->delegation_type = 0;
4926                 return 0;
4927         }
4928         status = decode_stateid(xdr, &res->delegation);
4929         if (unlikely(status))
4930                 return status;
4931         p = xdr_inline_decode(xdr, 4);
4932         if (unlikely(!p))
4933                 goto out_overflow;
4934         res->do_recall = be32_to_cpup(p);
4935
4936         switch (delegation_type) {
4937         case NFS4_OPEN_DELEGATE_READ:
4938                 res->delegation_type = FMODE_READ;
4939                 break;
4940         case NFS4_OPEN_DELEGATE_WRITE:
4941                 res->delegation_type = FMODE_WRITE|FMODE_READ;
4942                 if (decode_space_limit(xdr, &res->maxsize) < 0)
4943                                 return -EIO;
4944         }
4945         return decode_ace(xdr, NULL, res->server->nfs_client);
4946 out_overflow:
4947         print_overflow_msg(__func__, xdr);
4948         return -EIO;
4949 }
4950
4951 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
4952 {
4953         __be32 *p;
4954         uint32_t savewords, bmlen, i;
4955         int status;
4956
4957         status = decode_op_hdr(xdr, OP_OPEN);
4958         if (status != -EIO)
4959                 nfs_increment_open_seqid(status, res->seqid);
4960         if (!status)
4961                 status = decode_stateid(xdr, &res->stateid);
4962         if (unlikely(status))
4963                 return status;
4964
4965         decode_change_info(xdr, &res->cinfo);
4966
4967         p = xdr_inline_decode(xdr, 8);
4968         if (unlikely(!p))
4969                 goto out_overflow;
4970         res->rflags = be32_to_cpup(p++);
4971         bmlen = be32_to_cpup(p);
4972         if (bmlen > 10)
4973                 goto xdr_error;
4974
4975         p = xdr_inline_decode(xdr, bmlen << 2);
4976         if (unlikely(!p))
4977                 goto out_overflow;
4978         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
4979         for (i = 0; i < savewords; ++i)
4980                 res->attrset[i] = be32_to_cpup(p++);
4981         for (; i < NFS4_BITMAP_SIZE; i++)
4982                 res->attrset[i] = 0;
4983
4984         return decode_delegation(xdr, res);
4985 xdr_error:
4986         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
4987         return -EIO;
4988 out_overflow:
4989         print_overflow_msg(__func__, xdr);
4990         return -EIO;
4991 }
4992
4993 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
4994 {
4995         int status;
4996
4997         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
4998         if (status != -EIO)
4999                 nfs_increment_open_seqid(status, res->seqid);
5000         if (!status)
5001                 status = decode_stateid(xdr, &res->stateid);
5002         return status;
5003 }
5004
5005 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5006 {
5007         int status;
5008
5009         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5010         if (status != -EIO)
5011                 nfs_increment_open_seqid(status, res->seqid);
5012         if (!status)
5013                 status = decode_stateid(xdr, &res->stateid);
5014         return status;
5015 }
5016
5017 static int decode_putfh(struct xdr_stream *xdr)
5018 {
5019         return decode_op_hdr(xdr, OP_PUTFH);
5020 }
5021
5022 static int decode_putrootfh(struct xdr_stream *xdr)
5023 {
5024         return decode_op_hdr(xdr, OP_PUTROOTFH);
5025 }
5026
5027 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
5028 {
5029         __be32 *p;
5030         uint32_t count, eof, recvd;
5031         int status;
5032
5033         status = decode_op_hdr(xdr, OP_READ);
5034         if (status)
5035                 return status;
5036         p = xdr_inline_decode(xdr, 8);
5037         if (unlikely(!p))
5038                 goto out_overflow;
5039         eof = be32_to_cpup(p++);
5040         count = be32_to_cpup(p);
5041         recvd = xdr_read_pages(xdr, count);
5042         if (count > recvd) {
5043                 dprintk("NFS: server cheating in read reply: "
5044                                 "count %u > recvd %u\n", count, recvd);
5045                 count = recvd;
5046                 eof = 0;
5047         }
5048         res->eof = eof;
5049         res->count = count;
5050         return 0;
5051 out_overflow:
5052         print_overflow_msg(__func__, xdr);
5053         return -EIO;
5054 }
5055
5056 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5057 {
5058         int             status;
5059         __be32          verf[2];
5060
5061         status = decode_op_hdr(xdr, OP_READDIR);
5062         if (!status)
5063                 status = decode_verifier(xdr, readdir->verifier.data);
5064         if (unlikely(status))
5065                 return status;
5066         memcpy(verf, readdir->verifier.data, sizeof(verf));
5067         dprintk("%s: verifier = %08x:%08x\n",
5068                         __func__, verf[0], verf[1]);
5069         return xdr_read_pages(xdr, xdr->buf->page_len);
5070 }
5071
5072 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5073 {
5074         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5075         u32 len, recvd;
5076         __be32 *p;
5077         int status;
5078
5079         status = decode_op_hdr(xdr, OP_READLINK);
5080         if (status)
5081                 return status;
5082
5083         /* Convert length of symlink */
5084         p = xdr_inline_decode(xdr, 4);
5085         if (unlikely(!p))
5086                 goto out_overflow;
5087         len = be32_to_cpup(p);
5088         if (len >= rcvbuf->page_len || len <= 0) {
5089                 dprintk("nfs: server returned giant symlink!\n");
5090                 return -ENAMETOOLONG;
5091         }
5092         recvd = xdr_read_pages(xdr, len);
5093         if (recvd < len) {
5094                 dprintk("NFS: server cheating in readlink reply: "
5095                                 "count %u > recvd %u\n", len, recvd);
5096                 return -EIO;
5097         }
5098         /*
5099          * The XDR encode routine has set things up so that
5100          * the link text will be copied directly into the
5101          * buffer.  We just have to do overflow-checking,
5102          * and and null-terminate the text (the VFS expects
5103          * null-termination).
5104          */
5105         xdr_terminate_string(rcvbuf, len);
5106         return 0;
5107 out_overflow:
5108         print_overflow_msg(__func__, xdr);
5109         return -EIO;
5110 }
5111
5112 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5113 {
5114         int status;
5115
5116         status = decode_op_hdr(xdr, OP_REMOVE);
5117         if (status)
5118                 goto out;
5119         status = decode_change_info(xdr, cinfo);
5120 out:
5121         return status;
5122 }
5123
5124 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5125               struct nfs4_change_info *new_cinfo)
5126 {
5127         int status;
5128
5129         status = decode_op_hdr(xdr, OP_RENAME);
5130         if (status)
5131                 goto out;
5132         if ((status = decode_change_info(xdr, old_cinfo)))
5133                 goto out;
5134         status = decode_change_info(xdr, new_cinfo);
5135 out:
5136         return status;
5137 }
5138
5139 static int decode_renew(struct xdr_stream *xdr)
5140 {
5141         return decode_op_hdr(xdr, OP_RENEW);
5142 }
5143
5144 static int
5145 decode_restorefh(struct xdr_stream *xdr)
5146 {
5147         return decode_op_hdr(xdr, OP_RESTOREFH);
5148 }
5149
5150 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5151                          struct nfs_getaclres *res)
5152 {
5153         unsigned int savep;
5154         uint32_t attrlen,
5155                  bitmap[3] = {0};
5156         int status;
5157         unsigned int pg_offset;
5158
5159         res->acl_len = 0;
5160         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5161                 goto out;
5162
5163         xdr_enter_page(xdr, xdr->buf->page_len);
5164
5165         /* Calculate the offset of the page data */
5166         pg_offset = xdr->buf->head[0].iov_len;
5167
5168         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5169                 goto out;
5170         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5171                 goto out;
5172
5173         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5174                 return -EIO;
5175         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5176
5177                 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5178                  * are stored with the acl data to handle the problem of
5179                  * variable length bitmaps.*/
5180                 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5181                 res->acl_len = attrlen;
5182
5183                 /* Check for receive buffer overflow */
5184                 if (res->acl_len > (xdr->nwords << 2) ||
5185                     res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5186                         res->acl_flags |= NFS4_ACL_TRUNC;
5187                         dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5188                                         attrlen, xdr->nwords << 2);
5189                 }
5190         } else
5191                 status = -EOPNOTSUPP;
5192
5193 out:
5194         return status;
5195 }
5196
5197 static int
5198 decode_savefh(struct xdr_stream *xdr)
5199 {
5200         return decode_op_hdr(xdr, OP_SAVEFH);
5201 }
5202
5203 static int decode_setattr(struct xdr_stream *xdr)
5204 {
5205         __be32 *p;
5206         uint32_t bmlen;
5207         int status;
5208
5209         status = decode_op_hdr(xdr, OP_SETATTR);
5210         if (status)
5211                 return status;
5212         p = xdr_inline_decode(xdr, 4);
5213         if (unlikely(!p))
5214                 goto out_overflow;
5215         bmlen = be32_to_cpup(p);
5216         p = xdr_inline_decode(xdr, bmlen << 2);
5217         if (likely(p))
5218                 return 0;
5219 out_overflow:
5220         print_overflow_msg(__func__, xdr);
5221         return -EIO;
5222 }
5223
5224 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5225 {
5226         __be32 *p;
5227         uint32_t opnum;
5228         int32_t nfserr;
5229
5230         p = xdr_inline_decode(xdr, 8);
5231         if (unlikely(!p))
5232                 goto out_overflow;
5233         opnum = be32_to_cpup(p++);
5234         if (opnum != OP_SETCLIENTID) {
5235                 dprintk("nfs: decode_setclientid: Server returned operation"
5236                         " %d\n", opnum);
5237                 return -EIO;
5238         }
5239         nfserr = be32_to_cpup(p);
5240         if (nfserr == NFS_OK) {
5241                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5242                 if (unlikely(!p))
5243                         goto out_overflow;
5244                 p = xdr_decode_hyper(p, &res->clientid);
5245                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5246         } else if (nfserr == NFSERR_CLID_INUSE) {
5247                 uint32_t len;
5248
5249                 /* skip netid string */
5250                 p = xdr_inline_decode(xdr, 4);
5251                 if (unlikely(!p))
5252                         goto out_overflow;
5253                 len = be32_to_cpup(p);
5254                 p = xdr_inline_decode(xdr, len);
5255                 if (unlikely(!p))
5256                         goto out_overflow;
5257
5258                 /* skip uaddr string */
5259                 p = xdr_inline_decode(xdr, 4);
5260                 if (unlikely(!p))
5261                         goto out_overflow;
5262                 len = be32_to_cpup(p);
5263                 p = xdr_inline_decode(xdr, len);
5264                 if (unlikely(!p))
5265                         goto out_overflow;
5266                 return -NFSERR_CLID_INUSE;
5267         } else
5268                 return nfs4_stat_to_errno(nfserr);
5269
5270         return 0;
5271 out_overflow:
5272         print_overflow_msg(__func__, xdr);
5273         return -EIO;
5274 }
5275
5276 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5277 {
5278         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5279 }
5280
5281 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
5282 {
5283         __be32 *p;
5284         int status;
5285
5286         status = decode_op_hdr(xdr, OP_WRITE);
5287         if (status)
5288                 return status;
5289
5290         p = xdr_inline_decode(xdr, 8);
5291         if (unlikely(!p))
5292                 goto out_overflow;
5293         res->count = be32_to_cpup(p++);
5294         res->verf->committed = be32_to_cpup(p++);
5295         return decode_write_verifier(xdr, &res->verf->verifier);
5296 out_overflow:
5297         print_overflow_msg(__func__, xdr);
5298         return -EIO;
5299 }
5300
5301 static int decode_delegreturn(struct xdr_stream *xdr)
5302 {
5303         return decode_op_hdr(xdr, OP_DELEGRETURN);
5304 }
5305
5306 static int decode_secinfo_gss(struct xdr_stream *xdr,
5307                               struct nfs4_secinfo4 *flavor)
5308 {
5309         u32 oid_len;
5310         __be32 *p;
5311
5312         p = xdr_inline_decode(xdr, 4);
5313         if (unlikely(!p))
5314                 goto out_overflow;
5315         oid_len = be32_to_cpup(p);
5316         if (oid_len > GSS_OID_MAX_LEN)
5317                 goto out_err;
5318
5319         p = xdr_inline_decode(xdr, oid_len);
5320         if (unlikely(!p))
5321                 goto out_overflow;
5322         memcpy(flavor->flavor_info.oid.data, p, oid_len);
5323         flavor->flavor_info.oid.len = oid_len;
5324
5325         p = xdr_inline_decode(xdr, 8);
5326         if (unlikely(!p))
5327                 goto out_overflow;
5328         flavor->flavor_info.qop = be32_to_cpup(p++);
5329         flavor->flavor_info.service = be32_to_cpup(p);
5330
5331         return 0;
5332
5333 out_overflow:
5334         print_overflow_msg(__func__, xdr);
5335         return -EIO;
5336 out_err:
5337         return -EINVAL;
5338 }
5339
5340 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5341 {
5342         struct nfs4_secinfo4 *sec_flavor;
5343         unsigned int i, num_flavors;
5344         int status;
5345         __be32 *p;
5346
5347         p = xdr_inline_decode(xdr, 4);
5348         if (unlikely(!p))
5349                 goto out_overflow;
5350
5351         res->flavors->num_flavors = 0;
5352         num_flavors = be32_to_cpup(p);
5353
5354         for (i = 0; i < num_flavors; i++) {
5355                 sec_flavor = &res->flavors->flavors[i];
5356                 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5357                         break;
5358
5359                 p = xdr_inline_decode(xdr, 4);
5360                 if (unlikely(!p))
5361                         goto out_overflow;
5362                 sec_flavor->flavor = be32_to_cpup(p);
5363
5364                 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5365                         status = decode_secinfo_gss(xdr, sec_flavor);
5366                         if (status)
5367                                 goto out;
5368                 }
5369                 res->flavors->num_flavors++;
5370         }
5371
5372         status = 0;
5373 out:
5374         return status;
5375 out_overflow:
5376         print_overflow_msg(__func__, xdr);
5377         return -EIO;
5378 }
5379
5380 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5381 {
5382         int status = decode_op_hdr(xdr, OP_SECINFO);
5383         if (status)
5384                 return status;
5385         return decode_secinfo_common(xdr, res);
5386 }
5387
5388 #if defined(CONFIG_NFS_V4_1)
5389 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5390 {
5391         int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5392         if (status)
5393                 return status;
5394         return decode_secinfo_common(xdr, res);
5395 }
5396
5397 static int decode_exchange_id(struct xdr_stream *xdr,
5398                               struct nfs41_exchange_id_res *res)
5399 {
5400         __be32 *p;
5401         uint32_t dummy;
5402         char *dummy_str;
5403         int status;
5404         uint32_t impl_id_count;
5405
5406         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5407         if (status)
5408                 return status;
5409
5410         p = xdr_inline_decode(xdr, 8);
5411         if (unlikely(!p))
5412                 goto out_overflow;
5413         xdr_decode_hyper(p, &res->clientid);
5414         p = xdr_inline_decode(xdr, 12);
5415         if (unlikely(!p))
5416                 goto out_overflow;
5417         res->seqid = be32_to_cpup(p++);
5418         res->flags = be32_to_cpup(p++);
5419
5420         /* We ask for SP4_NONE */
5421         dummy = be32_to_cpup(p);
5422         if (dummy != SP4_NONE)
5423                 return -EIO;
5424
5425         /* server_owner4.so_minor_id */
5426         p = xdr_inline_decode(xdr, 8);
5427         if (unlikely(!p))
5428                 goto out_overflow;
5429         p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5430
5431         /* server_owner4.so_major_id */
5432         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5433         if (unlikely(status))
5434                 return status;
5435         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5436                 return -EIO;
5437         memcpy(res->server_owner->major_id, dummy_str, dummy);
5438         res->server_owner->major_id_sz = dummy;
5439
5440         /* server_scope4 */
5441         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5442         if (unlikely(status))
5443                 return status;
5444         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5445                 return -EIO;
5446         memcpy(res->server_scope->server_scope, dummy_str, dummy);
5447         res->server_scope->server_scope_sz = dummy;
5448
5449         /* Implementation Id */
5450         p = xdr_inline_decode(xdr, 4);
5451         if (unlikely(!p))
5452                 goto out_overflow;
5453         impl_id_count = be32_to_cpup(p++);
5454
5455         if (impl_id_count) {
5456                 /* nii_domain */
5457                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5458                 if (unlikely(status))
5459                         return status;
5460                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5461                         return -EIO;
5462                 memcpy(res->impl_id->domain, dummy_str, dummy);
5463
5464                 /* nii_name */
5465                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5466                 if (unlikely(status))
5467                         return status;
5468                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5469                         return -EIO;
5470                 memcpy(res->impl_id->name, dummy_str, dummy);
5471
5472                 /* nii_date */
5473                 p = xdr_inline_decode(xdr, 12);
5474                 if (unlikely(!p))
5475                         goto out_overflow;
5476                 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5477                 res->impl_id->date.nseconds = be32_to_cpup(p);
5478
5479                 /* if there's more than one entry, ignore the rest */
5480         }
5481         return 0;
5482 out_overflow:
5483         print_overflow_msg(__func__, xdr);
5484         return -EIO;
5485 }
5486
5487 static int decode_chan_attrs(struct xdr_stream *xdr,
5488                              struct nfs4_channel_attrs *attrs)
5489 {
5490         __be32 *p;
5491         u32 nr_attrs, val;
5492
5493         p = xdr_inline_decode(xdr, 28);
5494         if (unlikely(!p))
5495                 goto out_overflow;
5496         val = be32_to_cpup(p++);        /* headerpadsz */
5497         if (val)
5498                 return -EINVAL;         /* no support for header padding yet */
5499         attrs->max_rqst_sz = be32_to_cpup(p++);
5500         attrs->max_resp_sz = be32_to_cpup(p++);
5501         attrs->max_resp_sz_cached = be32_to_cpup(p++);
5502         attrs->max_ops = be32_to_cpup(p++);
5503         attrs->max_reqs = be32_to_cpup(p++);
5504         nr_attrs = be32_to_cpup(p);
5505         if (unlikely(nr_attrs > 1)) {
5506                 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5507                         "count %u\n", __func__, nr_attrs);
5508                 return -EINVAL;
5509         }
5510         if (nr_attrs == 1) {
5511                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5512                 if (unlikely(!p))
5513                         goto out_overflow;
5514         }
5515         return 0;
5516 out_overflow:
5517         print_overflow_msg(__func__, xdr);
5518         return -EIO;
5519 }
5520
5521 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5522 {
5523         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5524 }
5525
5526 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5527                                 struct nfs41_bind_conn_to_session_res *res)
5528 {
5529         __be32 *p;
5530         int status;
5531
5532         status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5533         if (!status)
5534                 status = decode_sessionid(xdr, &res->session->sess_id);
5535         if (unlikely(status))
5536                 return status;
5537
5538         /* dir flags, rdma mode bool */
5539         p = xdr_inline_decode(xdr, 8);
5540         if (unlikely(!p))
5541                 goto out_overflow;
5542
5543         res->dir = be32_to_cpup(p++);
5544         if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5545                 return -EIO;
5546         if (be32_to_cpup(p) == 0)
5547                 res->use_conn_in_rdma_mode = false;
5548         else
5549                 res->use_conn_in_rdma_mode = true;
5550
5551         return 0;
5552 out_overflow:
5553         print_overflow_msg(__func__, xdr);
5554         return -EIO;
5555 }
5556
5557 static int decode_create_session(struct xdr_stream *xdr,
5558                                  struct nfs41_create_session_res *res)
5559 {
5560         __be32 *p;
5561         int status;
5562         struct nfs_client *clp = res->client;
5563         struct nfs4_session *session = clp->cl_session;
5564
5565         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5566         if (!status)
5567                 status = decode_sessionid(xdr, &session->sess_id);
5568         if (unlikely(status))
5569                 return status;
5570
5571         /* seqid, flags */
5572         p = xdr_inline_decode(xdr, 8);
5573         if (unlikely(!p))
5574                 goto out_overflow;
5575         clp->cl_seqid = be32_to_cpup(p++);
5576         session->flags = be32_to_cpup(p);
5577
5578         /* Channel attributes */
5579         status = decode_chan_attrs(xdr, &session->fc_attrs);
5580         if (!status)
5581                 status = decode_chan_attrs(xdr, &session->bc_attrs);
5582         return status;
5583 out_overflow:
5584         print_overflow_msg(__func__, xdr);
5585         return -EIO;
5586 }
5587
5588 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5589 {
5590         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5591 }
5592
5593 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5594 {
5595         return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5596 }
5597
5598 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5599 {
5600         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5601 }
5602 #endif /* CONFIG_NFS_V4_1 */
5603
5604 static int decode_sequence(struct xdr_stream *xdr,
5605                            struct nfs4_sequence_res *res,
5606                            struct rpc_rqst *rqstp)
5607 {
5608 #if defined(CONFIG_NFS_V4_1)
5609         struct nfs4_session *session;
5610         struct nfs4_sessionid id;
5611         u32 dummy;
5612         int status;
5613         __be32 *p;
5614
5615         if (res->sr_slot == NULL)
5616                 return 0;
5617
5618         status = decode_op_hdr(xdr, OP_SEQUENCE);
5619         if (!status)
5620                 status = decode_sessionid(xdr, &id);
5621         if (unlikely(status))
5622                 goto out_err;
5623
5624         /*
5625          * If the server returns different values for sessionID, slotID or
5626          * sequence number, the server is looney tunes.
5627          */
5628         status = -EREMOTEIO;
5629         session = res->sr_slot->table->session;
5630
5631         if (memcmp(id.data, session->sess_id.data,
5632                    NFS4_MAX_SESSIONID_LEN)) {
5633                 dprintk("%s Invalid session id\n", __func__);
5634                 goto out_err;
5635         }
5636
5637         p = xdr_inline_decode(xdr, 20);
5638         if (unlikely(!p))
5639                 goto out_overflow;
5640
5641         /* seqid */
5642         dummy = be32_to_cpup(p++);
5643         if (dummy != res->sr_slot->seq_nr) {
5644                 dprintk("%s Invalid sequence number\n", __func__);
5645                 goto out_err;
5646         }
5647         /* slot id */
5648         dummy = be32_to_cpup(p++);
5649         if (dummy != res->sr_slot->slot_nr) {
5650                 dprintk("%s Invalid slot id\n", __func__);
5651                 goto out_err;
5652         }
5653         /* highest slot id */
5654         res->sr_highest_slotid = be32_to_cpup(p++);
5655         /* target highest slot id */
5656         res->sr_target_highest_slotid = be32_to_cpup(p++);
5657         /* result flags */
5658         res->sr_status_flags = be32_to_cpup(p);
5659         status = 0;
5660 out_err:
5661         res->sr_status = status;
5662         return status;
5663 out_overflow:
5664         print_overflow_msg(__func__, xdr);
5665         status = -EIO;
5666         goto out_err;
5667 #else  /* CONFIG_NFS_V4_1 */
5668         return 0;
5669 #endif /* CONFIG_NFS_V4_1 */
5670 }
5671
5672 #if defined(CONFIG_NFS_V4_1)
5673 /*
5674  * TODO: Need to handle case when EOF != true;
5675  */
5676 static int decode_getdevicelist(struct xdr_stream *xdr,
5677                                 struct pnfs_devicelist *res)
5678 {
5679         __be32 *p;
5680         int status, i;
5681         nfs4_verifier verftemp;
5682
5683         status = decode_op_hdr(xdr, OP_GETDEVICELIST);
5684         if (status)
5685                 return status;
5686
5687         p = xdr_inline_decode(xdr, 8 + 8 + 4);
5688         if (unlikely(!p))
5689                 goto out_overflow;
5690
5691         /* TODO: Skip cookie for now */
5692         p += 2;
5693
5694         /* Read verifier */
5695         p = xdr_decode_opaque_fixed(p, verftemp.data, NFS4_VERIFIER_SIZE);
5696
5697         res->num_devs = be32_to_cpup(p);
5698
5699         dprintk("%s: num_dev %d\n", __func__, res->num_devs);
5700
5701         if (res->num_devs > NFS4_PNFS_GETDEVLIST_MAXNUM) {
5702                 printk(KERN_ERR "NFS: %s too many result dev_num %u\n",
5703                                 __func__, res->num_devs);
5704                 return -EIO;
5705         }
5706
5707         p = xdr_inline_decode(xdr,
5708                               res->num_devs * NFS4_DEVICEID4_SIZE + 4);
5709         if (unlikely(!p))
5710                 goto out_overflow;
5711         for (i = 0; i < res->num_devs; i++)
5712                 p = xdr_decode_opaque_fixed(p, res->dev_id[i].data,
5713                                             NFS4_DEVICEID4_SIZE);
5714         res->eof = be32_to_cpup(p);
5715         return 0;
5716 out_overflow:
5717         print_overflow_msg(__func__, xdr);
5718         return -EIO;
5719 }
5720
5721 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5722                                 struct pnfs_device *pdev)
5723 {
5724         __be32 *p;
5725         uint32_t len, type;
5726         int status;
5727
5728         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5729         if (status) {
5730                 if (status == -ETOOSMALL) {
5731                         p = xdr_inline_decode(xdr, 4);
5732                         if (unlikely(!p))
5733                                 goto out_overflow;
5734                         pdev->mincount = be32_to_cpup(p);
5735                         dprintk("%s: Min count too small. mincnt = %u\n",
5736                                 __func__, pdev->mincount);
5737                 }
5738                 return status;
5739         }
5740
5741         p = xdr_inline_decode(xdr, 8);
5742         if (unlikely(!p))
5743                 goto out_overflow;
5744         type = be32_to_cpup(p++);
5745         if (type != pdev->layout_type) {
5746                 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5747                         __func__, pdev->layout_type, type);
5748                 return -EINVAL;
5749         }
5750         /*
5751          * Get the length of the opaque device_addr4. xdr_read_pages places
5752          * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5753          * and places the remaining xdr data in xdr_buf->tail
5754          */
5755         pdev->mincount = be32_to_cpup(p);
5756         if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5757                 goto out_overflow;
5758
5759         /* Parse notification bitmap, verifying that it is zero. */
5760         p = xdr_inline_decode(xdr, 4);
5761         if (unlikely(!p))
5762                 goto out_overflow;
5763         len = be32_to_cpup(p);
5764         if (len) {
5765                 uint32_t i;
5766
5767                 p = xdr_inline_decode(xdr, 4 * len);
5768                 if (unlikely(!p))
5769                         goto out_overflow;
5770                 for (i = 0; i < len; i++, p++) {
5771                         if (be32_to_cpup(p)) {
5772                                 dprintk("%s: notifications not supported\n",
5773                                         __func__);
5774                                 return -EIO;
5775                         }
5776                 }
5777         }
5778         return 0;
5779 out_overflow:
5780         print_overflow_msg(__func__, xdr);
5781         return -EIO;
5782 }
5783
5784 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5785                             struct nfs4_layoutget_res *res)
5786 {
5787         __be32 *p;
5788         int status;
5789         u32 layout_count;
5790         u32 recvd;
5791
5792         status = decode_op_hdr(xdr, OP_LAYOUTGET);
5793         if (status)
5794                 return status;
5795         p = xdr_inline_decode(xdr, 4);
5796         if (unlikely(!p))
5797                 goto out_overflow;
5798         res->return_on_close = be32_to_cpup(p);
5799         decode_stateid(xdr, &res->stateid);
5800         p = xdr_inline_decode(xdr, 4);
5801         if (unlikely(!p))
5802                 goto out_overflow;
5803         layout_count = be32_to_cpup(p);
5804         if (!layout_count) {
5805                 dprintk("%s: server responded with empty layout array\n",
5806                         __func__);
5807                 return -EINVAL;
5808         }
5809
5810         p = xdr_inline_decode(xdr, 28);
5811         if (unlikely(!p))
5812                 goto out_overflow;
5813         p = xdr_decode_hyper(p, &res->range.offset);
5814         p = xdr_decode_hyper(p, &res->range.length);
5815         res->range.iomode = be32_to_cpup(p++);
5816         res->type = be32_to_cpup(p++);
5817         res->layoutp->len = be32_to_cpup(p);
5818
5819         dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5820                 __func__,
5821                 (unsigned long)res->range.offset,
5822                 (unsigned long)res->range.length,
5823                 res->range.iomode,
5824                 res->type,
5825                 res->layoutp->len);
5826
5827         recvd = xdr_read_pages(xdr, res->layoutp->len);
5828         if (res->layoutp->len > recvd) {
5829                 dprintk("NFS: server cheating in layoutget reply: "
5830                                 "layout len %u > recvd %u\n",
5831                                 res->layoutp->len, recvd);
5832                 return -EINVAL;
5833         }
5834
5835         if (layout_count > 1) {
5836                 /* We only handle a length one array at the moment.  Any
5837                  * further entries are just ignored.  Note that this means
5838                  * the client may see a response that is less than the
5839                  * minimum it requested.
5840                  */
5841                 dprintk("%s: server responded with %d layouts, dropping tail\n",
5842                         __func__, layout_count);
5843         }
5844
5845         return 0;
5846 out_overflow:
5847         print_overflow_msg(__func__, xdr);
5848         return -EIO;
5849 }
5850
5851 static int decode_layoutreturn(struct xdr_stream *xdr,
5852                                struct nfs4_layoutreturn_res *res)
5853 {
5854         __be32 *p;
5855         int status;
5856
5857         status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5858         if (status)
5859                 return status;
5860         p = xdr_inline_decode(xdr, 4);
5861         if (unlikely(!p))
5862                 goto out_overflow;
5863         res->lrs_present = be32_to_cpup(p);
5864         if (res->lrs_present)
5865                 status = decode_stateid(xdr, &res->stateid);
5866         return status;
5867 out_overflow:
5868         print_overflow_msg(__func__, xdr);
5869         return -EIO;
5870 }
5871
5872 static int decode_layoutcommit(struct xdr_stream *xdr,
5873                                struct rpc_rqst *req,
5874                                struct nfs4_layoutcommit_res *res)
5875 {
5876         __be32 *p;
5877         __u32 sizechanged;
5878         int status;
5879
5880         status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5881         res->status = status;
5882         if (status)
5883                 return status;
5884
5885         p = xdr_inline_decode(xdr, 4);
5886         if (unlikely(!p))
5887                 goto out_overflow;
5888         sizechanged = be32_to_cpup(p);
5889
5890         if (sizechanged) {
5891                 /* throw away new size */
5892                 p = xdr_inline_decode(xdr, 8);
5893                 if (unlikely(!p))
5894                         goto out_overflow;
5895         }
5896         return 0;
5897 out_overflow:
5898         print_overflow_msg(__func__, xdr);
5899         return -EIO;
5900 }
5901
5902 static int decode_test_stateid(struct xdr_stream *xdr,
5903                                struct nfs41_test_stateid_res *res)
5904 {
5905         __be32 *p;
5906         int status;
5907         int num_res;
5908
5909         status = decode_op_hdr(xdr, OP_TEST_STATEID);
5910         if (status)
5911                 return status;
5912
5913         p = xdr_inline_decode(xdr, 4);
5914         if (unlikely(!p))
5915                 goto out_overflow;
5916         num_res = be32_to_cpup(p++);
5917         if (num_res != 1)
5918                 goto out;
5919
5920         p = xdr_inline_decode(xdr, 4);
5921         if (unlikely(!p))
5922                 goto out_overflow;
5923         res->status = be32_to_cpup(p++);
5924
5925         return status;
5926 out_overflow:
5927         print_overflow_msg(__func__, xdr);
5928 out:
5929         return -EIO;
5930 }
5931
5932 static int decode_free_stateid(struct xdr_stream *xdr,
5933                                struct nfs41_free_stateid_res *res)
5934 {
5935         __be32 *p;
5936         int status;
5937
5938         status = decode_op_hdr(xdr, OP_FREE_STATEID);
5939         if (status)
5940                 return status;
5941
5942         p = xdr_inline_decode(xdr, 4);
5943         if (unlikely(!p))
5944                 goto out_overflow;
5945         res->status = be32_to_cpup(p++);
5946         return res->status;
5947 out_overflow:
5948         print_overflow_msg(__func__, xdr);
5949         return -EIO;
5950 }
5951 #endif /* CONFIG_NFS_V4_1 */
5952
5953 /*
5954  * END OF "GENERIC" DECODE ROUTINES.
5955  */
5956
5957 /*
5958  * Decode OPEN_DOWNGRADE response
5959  */
5960 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
5961                                        struct xdr_stream *xdr,
5962                                        struct nfs_closeres *res)
5963 {
5964         struct compound_hdr hdr;
5965         int status;
5966
5967         status = decode_compound_hdr(xdr, &hdr);
5968         if (status)
5969                 goto out;
5970         status = decode_sequence(xdr, &res->seq_res, rqstp);
5971         if (status)
5972                 goto out;
5973         status = decode_putfh(xdr);
5974         if (status)
5975                 goto out;
5976         status = decode_open_downgrade(xdr, res);
5977         if (status != 0)
5978                 goto out;
5979         decode_getfattr(xdr, res->fattr, res->server);
5980 out:
5981         return status;
5982 }
5983
5984 /*
5985  * Decode ACCESS response
5986  */
5987 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5988                                struct nfs4_accessres *res)
5989 {
5990         struct compound_hdr hdr;
5991         int status;
5992
5993         status = decode_compound_hdr(xdr, &hdr);
5994         if (status)
5995                 goto out;
5996         status = decode_sequence(xdr, &res->seq_res, rqstp);
5997         if (status)
5998                 goto out;
5999         status = decode_putfh(xdr);
6000         if (status != 0)
6001                 goto out;
6002         status = decode_access(xdr, &res->supported, &res->access);
6003         if (status != 0)
6004                 goto out;
6005         decode_getfattr(xdr, res->fattr, res->server);
6006 out:
6007         return status;
6008 }
6009
6010 /*
6011  * Decode LOOKUP response
6012  */
6013 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6014                                struct nfs4_lookup_res *res)
6015 {
6016         struct compound_hdr hdr;
6017         int status;
6018
6019         status = decode_compound_hdr(xdr, &hdr);
6020         if (status)
6021                 goto out;
6022         status = decode_sequence(xdr, &res->seq_res, rqstp);
6023         if (status)
6024                 goto out;
6025         status = decode_putfh(xdr);
6026         if (status)
6027                 goto out;
6028         status = decode_lookup(xdr);
6029         if (status)
6030                 goto out;
6031         status = decode_getfh(xdr, res->fh);
6032         if (status)
6033                 goto out;
6034         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6035 out:
6036         return status;
6037 }
6038
6039 /*
6040  * Decode LOOKUP_ROOT response
6041  */
6042 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6043                                     struct xdr_stream *xdr,
6044                                     struct nfs4_lookup_res *res)
6045 {
6046         struct compound_hdr hdr;
6047         int status;
6048
6049         status = decode_compound_hdr(xdr, &hdr);
6050         if (status)
6051                 goto out;
6052         status = decode_sequence(xdr, &res->seq_res, rqstp);
6053         if (status)
6054                 goto out;
6055         status = decode_putrootfh(xdr);
6056         if (status)
6057                 goto out;
6058         status = decode_getfh(xdr, res->fh);
6059         if (status == 0)
6060                 status = decode_getfattr_label(xdr, res->fattr,
6061                                                 res->label, res->server);
6062 out:
6063         return status;
6064 }
6065
6066 /*
6067  * Decode REMOVE response
6068  */
6069 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6070                                struct nfs_removeres *res)
6071 {
6072         struct compound_hdr hdr;
6073         int status;
6074
6075         status = decode_compound_hdr(xdr, &hdr);
6076         if (status)
6077                 goto out;
6078         status = decode_sequence(xdr, &res->seq_res, rqstp);
6079         if (status)
6080                 goto out;
6081         status = decode_putfh(xdr);
6082         if (status)
6083                 goto out;
6084         status = decode_remove(xdr, &res->cinfo);
6085 out:
6086         return status;
6087 }
6088
6089 /*
6090  * Decode RENAME response
6091  */
6092 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6093                                struct nfs_renameres *res)
6094 {
6095         struct compound_hdr hdr;
6096         int status;
6097
6098         status = decode_compound_hdr(xdr, &hdr);
6099         if (status)
6100                 goto out;
6101         status = decode_sequence(xdr, &res->seq_res, rqstp);
6102         if (status)
6103                 goto out;
6104         status = decode_putfh(xdr);
6105         if (status)
6106                 goto out;
6107         status = decode_savefh(xdr);
6108         if (status)
6109                 goto out;
6110         status = decode_putfh(xdr);
6111         if (status)
6112                 goto out;
6113         status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6114 out:
6115         return status;
6116 }
6117
6118 /*
6119  * Decode LINK response
6120  */
6121 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6122                              struct nfs4_link_res *res)
6123 {
6124         struct compound_hdr hdr;
6125         int status;
6126
6127         status = decode_compound_hdr(xdr, &hdr);
6128         if (status)
6129                 goto out;
6130         status = decode_sequence(xdr, &res->seq_res, rqstp);
6131         if (status)
6132                 goto out;
6133         status = decode_putfh(xdr);
6134         if (status)
6135                 goto out;
6136         status = decode_savefh(xdr);
6137         if (status)
6138                 goto out;
6139         status = decode_putfh(xdr);
6140         if (status)
6141                 goto out;
6142         status = decode_link(xdr, &res->cinfo);
6143         if (status)
6144                 goto out;
6145         /*
6146          * Note order: OP_LINK leaves the directory as the current
6147          *             filehandle.
6148          */
6149         status = decode_restorefh(xdr);
6150         if (status)
6151                 goto out;
6152         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6153 out:
6154         return status;
6155 }
6156
6157 /*
6158  * Decode CREATE response
6159  */
6160 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6161                                struct nfs4_create_res *res)
6162 {
6163         struct compound_hdr hdr;
6164         int status;
6165
6166         status = decode_compound_hdr(xdr, &hdr);
6167         if (status)
6168                 goto out;
6169         status = decode_sequence(xdr, &res->seq_res, rqstp);
6170         if (status)
6171                 goto out;
6172         status = decode_putfh(xdr);
6173         if (status)
6174                 goto out;
6175         status = decode_create(xdr, &res->dir_cinfo);
6176         if (status)
6177                 goto out;
6178         status = decode_getfh(xdr, res->fh);
6179         if (status)
6180                 goto out;
6181         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6182 out:
6183         return status;
6184 }
6185
6186 /*
6187  * Decode SYMLINK response
6188  */
6189 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6190                                 struct nfs4_create_res *res)
6191 {
6192         return nfs4_xdr_dec_create(rqstp, xdr, res);
6193 }
6194
6195 /*
6196  * Decode GETATTR response
6197  */
6198 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6199                                 struct nfs4_getattr_res *res)
6200 {
6201         struct compound_hdr hdr;
6202         int status;
6203
6204         status = decode_compound_hdr(xdr, &hdr);
6205         if (status)
6206                 goto out;
6207         status = decode_sequence(xdr, &res->seq_res, rqstp);
6208         if (status)
6209                 goto out;
6210         status = decode_putfh(xdr);
6211         if (status)
6212                 goto out;
6213         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6214 out:
6215         return status;
6216 }
6217
6218 /*
6219  * Encode an SETACL request
6220  */
6221 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6222                                 struct nfs_setaclargs *args)
6223 {
6224         struct compound_hdr hdr = {
6225                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6226         };
6227
6228         encode_compound_hdr(xdr, req, &hdr);
6229         encode_sequence(xdr, &args->seq_args, &hdr);
6230         encode_putfh(xdr, args->fh, &hdr);
6231         encode_setacl(xdr, args, &hdr);
6232         encode_nops(&hdr);
6233 }
6234
6235 /*
6236  * Decode SETACL response
6237  */
6238 static int
6239 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6240                     struct nfs_setaclres *res)
6241 {
6242         struct compound_hdr hdr;
6243         int status;
6244
6245         status = decode_compound_hdr(xdr, &hdr);
6246         if (status)
6247                 goto out;
6248         status = decode_sequence(xdr, &res->seq_res, rqstp);
6249         if (status)
6250                 goto out;
6251         status = decode_putfh(xdr);
6252         if (status)
6253                 goto out;
6254         status = decode_setattr(xdr);
6255 out:
6256         return status;
6257 }
6258
6259 /*
6260  * Decode GETACL response
6261  */
6262 static int
6263 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6264                     struct nfs_getaclres *res)
6265 {
6266         struct compound_hdr hdr;
6267         int status;
6268
6269         if (res->acl_scratch != NULL) {
6270                 void *p = page_address(res->acl_scratch);
6271                 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6272         }
6273         status = decode_compound_hdr(xdr, &hdr);
6274         if (status)
6275                 goto out;
6276         status = decode_sequence(xdr, &res->seq_res, rqstp);
6277         if (status)
6278                 goto out;
6279         status = decode_putfh(xdr);
6280         if (status)
6281                 goto out;
6282         status = decode_getacl(xdr, rqstp, res);
6283
6284 out:
6285         return status;
6286 }
6287
6288 /*
6289  * Decode CLOSE response
6290  */
6291 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6292                               struct nfs_closeres *res)
6293 {
6294         struct compound_hdr hdr;
6295         int status;
6296
6297         status = decode_compound_hdr(xdr, &hdr);
6298         if (status)
6299                 goto out;
6300         status = decode_sequence(xdr, &res->seq_res, rqstp);
6301         if (status)
6302                 goto out;
6303         status = decode_putfh(xdr);
6304         if (status)
6305                 goto out;
6306         status = decode_close(xdr, res);
6307         if (status != 0)
6308                 goto out;
6309         /*
6310          * Note: Server may do delete on close for this file
6311          *      in which case the getattr call will fail with
6312          *      an ESTALE error. Shouldn't be a problem,
6313          *      though, since fattr->valid will remain unset.
6314          */
6315         decode_getfattr(xdr, res->fattr, res->server);
6316 out:
6317         return status;
6318 }
6319
6320 /*
6321  * Decode OPEN response
6322  */
6323 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6324                              struct nfs_openres *res)
6325 {
6326         struct compound_hdr hdr;
6327         int status;
6328
6329         status = decode_compound_hdr(xdr, &hdr);
6330         if (status)
6331                 goto out;
6332         status = decode_sequence(xdr, &res->seq_res, rqstp);
6333         if (status)
6334                 goto out;
6335         status = decode_putfh(xdr);
6336         if (status)
6337                 goto out;
6338         status = decode_open(xdr, res);
6339         if (status)
6340                 goto out;
6341         status = decode_getfh(xdr, &res->fh);
6342         if (status)
6343                 goto out;
6344         if (res->access_request)
6345                 decode_access(xdr, &res->access_supported, &res->access_result);
6346         decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6347 out:
6348         return status;
6349 }
6350
6351 /*
6352  * Decode OPEN_CONFIRM response
6353  */
6354 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6355                                      struct xdr_stream *xdr,
6356                                      struct nfs_open_confirmres *res)
6357 {
6358         struct compound_hdr hdr;
6359         int status;
6360
6361         status = decode_compound_hdr(xdr, &hdr);
6362         if (status)
6363                 goto out;
6364         status = decode_putfh(xdr);
6365         if (status)
6366                 goto out;
6367         status = decode_open_confirm(xdr, res);
6368 out:
6369         return status;
6370 }
6371
6372 /*
6373  * Decode OPEN response
6374  */
6375 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6376                                     struct xdr_stream *xdr,
6377                                     struct nfs_openres *res)
6378 {
6379         struct compound_hdr hdr;
6380         int status;
6381
6382         status = decode_compound_hdr(xdr, &hdr);
6383         if (status)
6384                 goto out;
6385         status = decode_sequence(xdr, &res->seq_res, rqstp);
6386         if (status)
6387                 goto out;
6388         status = decode_putfh(xdr);
6389         if (status)
6390                 goto out;
6391         status = decode_open(xdr, res);
6392         if (status)
6393                 goto out;
6394         if (res->access_request)
6395                 decode_access(xdr, &res->access_supported, &res->access_result);
6396         decode_getfattr(xdr, res->f_attr, res->server);
6397 out:
6398         return status;
6399 }
6400
6401 /*
6402  * Decode SETATTR response
6403  */
6404 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6405                                 struct xdr_stream *xdr,
6406                                 struct nfs_setattrres *res)
6407 {
6408         struct compound_hdr hdr;
6409         int status;
6410
6411         status = decode_compound_hdr(xdr, &hdr);
6412         if (status)
6413                 goto out;
6414         status = decode_sequence(xdr, &res->seq_res, rqstp);
6415         if (status)
6416                 goto out;
6417         status = decode_putfh(xdr);
6418         if (status)
6419                 goto out;
6420         status = decode_setattr(xdr);
6421         if (status)
6422                 goto out;
6423         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6424 out:
6425         return status;
6426 }
6427
6428 /*
6429  * Decode LOCK response
6430  */
6431 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6432                              struct nfs_lock_res *res)
6433 {
6434         struct compound_hdr hdr;
6435         int status;
6436
6437         status = decode_compound_hdr(xdr, &hdr);
6438         if (status)
6439                 goto out;
6440         status = decode_sequence(xdr, &res->seq_res, rqstp);
6441         if (status)
6442                 goto out;
6443         status = decode_putfh(xdr);
6444         if (status)
6445                 goto out;
6446         status = decode_lock(xdr, res);
6447 out:
6448         return status;
6449 }
6450
6451 /*
6452  * Decode LOCKT response
6453  */
6454 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6455                               struct nfs_lockt_res *res)
6456 {
6457         struct compound_hdr hdr;
6458         int status;
6459
6460         status = decode_compound_hdr(xdr, &hdr);
6461         if (status)
6462                 goto out;
6463         status = decode_sequence(xdr, &res->seq_res, rqstp);
6464         if (status)
6465                 goto out;
6466         status = decode_putfh(xdr);
6467         if (status)
6468                 goto out;
6469         status = decode_lockt(xdr, res);
6470 out:
6471         return status;
6472 }
6473
6474 /*
6475  * Decode LOCKU response
6476  */
6477 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6478                               struct nfs_locku_res *res)
6479 {
6480         struct compound_hdr hdr;
6481         int status;
6482
6483         status = decode_compound_hdr(xdr, &hdr);
6484         if (status)
6485                 goto out;
6486         status = decode_sequence(xdr, &res->seq_res, rqstp);
6487         if (status)
6488                 goto out;
6489         status = decode_putfh(xdr);
6490         if (status)
6491                 goto out;
6492         status = decode_locku(xdr, res);
6493 out:
6494         return status;
6495 }
6496
6497 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6498                                           struct xdr_stream *xdr, void *dummy)
6499 {
6500         struct compound_hdr hdr;
6501         int status;
6502
6503         status = decode_compound_hdr(xdr, &hdr);
6504         if (!status)
6505                 status = decode_release_lockowner(xdr);
6506         return status;
6507 }
6508
6509 /*
6510  * Decode READLINK response
6511  */
6512 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6513                                  struct xdr_stream *xdr,
6514                                  struct nfs4_readlink_res *res)
6515 {
6516         struct compound_hdr hdr;
6517         int status;
6518
6519         status = decode_compound_hdr(xdr, &hdr);
6520         if (status)
6521                 goto out;
6522         status = decode_sequence(xdr, &res->seq_res, rqstp);
6523         if (status)
6524                 goto out;
6525         status = decode_putfh(xdr);
6526         if (status)
6527                 goto out;
6528         status = decode_readlink(xdr, rqstp);
6529 out:
6530         return status;
6531 }
6532
6533 /*
6534  * Decode READDIR response
6535  */
6536 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6537                                 struct nfs4_readdir_res *res)
6538 {
6539         struct compound_hdr hdr;
6540         int status;
6541
6542         status = decode_compound_hdr(xdr, &hdr);
6543         if (status)
6544                 goto out;
6545         status = decode_sequence(xdr, &res->seq_res, rqstp);
6546         if (status)
6547                 goto out;
6548         status = decode_putfh(xdr);
6549         if (status)
6550                 goto out;
6551         status = decode_readdir(xdr, rqstp, res);
6552 out:
6553         return status;
6554 }
6555
6556 /*
6557  * Decode Read response
6558  */
6559 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6560                              struct nfs_readres *res)
6561 {
6562         struct compound_hdr hdr;
6563         int status;
6564
6565         status = decode_compound_hdr(xdr, &hdr);
6566         if (status)
6567                 goto out;
6568         status = decode_sequence(xdr, &res->seq_res, rqstp);
6569         if (status)
6570                 goto out;
6571         status = decode_putfh(xdr);
6572         if (status)
6573                 goto out;
6574         status = decode_read(xdr, rqstp, res);
6575         if (!status)
6576                 status = res->count;
6577 out:
6578         return status;
6579 }
6580
6581 /*
6582  * Decode WRITE response
6583  */
6584 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6585                               struct nfs_writeres *res)
6586 {
6587         struct compound_hdr hdr;
6588         int status;
6589
6590         status = decode_compound_hdr(xdr, &hdr);
6591         if (status)
6592                 goto out;
6593         status = decode_sequence(xdr, &res->seq_res, rqstp);
6594         if (status)
6595                 goto out;
6596         status = decode_putfh(xdr);
6597         if (status)
6598                 goto out;
6599         status = decode_write(xdr, res);
6600         if (status)
6601                 goto out;
6602         if (res->fattr)
6603                 decode_getfattr(xdr, res->fattr, res->server);
6604         if (!status)
6605                 status = res->count;
6606 out:
6607         return status;
6608 }
6609
6610 /*
6611  * Decode COMMIT response
6612  */
6613 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6614                                struct nfs_commitres *res)
6615 {
6616         struct compound_hdr hdr;
6617         int status;
6618
6619         status = decode_compound_hdr(xdr, &hdr);
6620         if (status)
6621                 goto out;
6622         status = decode_sequence(xdr, &res->seq_res, rqstp);
6623         if (status)
6624                 goto out;
6625         status = decode_putfh(xdr);
6626         if (status)
6627                 goto out;
6628         status = decode_commit(xdr, res);
6629 out:
6630         return status;
6631 }
6632
6633 /*
6634  * Decode FSINFO response
6635  */
6636 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6637                                struct nfs4_fsinfo_res *res)
6638 {
6639         struct compound_hdr hdr;
6640         int status;
6641
6642         status = decode_compound_hdr(xdr, &hdr);
6643         if (!status)
6644                 status = decode_sequence(xdr, &res->seq_res, req);
6645         if (!status)
6646                 status = decode_putfh(xdr);
6647         if (!status)
6648                 status = decode_fsinfo(xdr, res->fsinfo);
6649         return status;
6650 }
6651
6652 /*
6653  * Decode PATHCONF response
6654  */
6655 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6656                                  struct nfs4_pathconf_res *res)
6657 {
6658         struct compound_hdr hdr;
6659         int status;
6660
6661         status = decode_compound_hdr(xdr, &hdr);
6662         if (!status)
6663                 status = decode_sequence(xdr, &res->seq_res, req);
6664         if (!status)
6665                 status = decode_putfh(xdr);
6666         if (!status)
6667                 status = decode_pathconf(xdr, res->pathconf);
6668         return status;
6669 }
6670
6671 /*
6672  * Decode STATFS response
6673  */
6674 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6675                                struct nfs4_statfs_res *res)
6676 {
6677         struct compound_hdr hdr;
6678         int status;
6679
6680         status = decode_compound_hdr(xdr, &hdr);
6681         if (!status)
6682                 status = decode_sequence(xdr, &res->seq_res, req);
6683         if (!status)
6684                 status = decode_putfh(xdr);
6685         if (!status)
6686                 status = decode_statfs(xdr, res->fsstat);
6687         return status;
6688 }
6689
6690 /*
6691  * Decode GETATTR_BITMAP response
6692  */
6693 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6694                                     struct xdr_stream *xdr,
6695                                     struct nfs4_server_caps_res *res)
6696 {
6697         struct compound_hdr hdr;
6698         int status;
6699
6700         status = decode_compound_hdr(xdr, &hdr);
6701         if (status)
6702                 goto out;
6703         status = decode_sequence(xdr, &res->seq_res, req);
6704         if (status)
6705                 goto out;
6706         status = decode_putfh(xdr);
6707         if (status)
6708                 goto out;
6709         status = decode_server_caps(xdr, res);
6710 out:
6711         return status;
6712 }
6713
6714 /*
6715  * Decode RENEW response
6716  */
6717 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6718                               void *__unused)
6719 {
6720         struct compound_hdr hdr;
6721         int status;
6722
6723         status = decode_compound_hdr(xdr, &hdr);
6724         if (!status)
6725                 status = decode_renew(xdr);
6726         return status;
6727 }
6728
6729 /*
6730  * Decode SETCLIENTID response
6731  */
6732 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6733                                     struct xdr_stream *xdr,
6734                                     struct nfs4_setclientid_res *res)
6735 {
6736         struct compound_hdr hdr;
6737         int status;
6738
6739         status = decode_compound_hdr(xdr, &hdr);
6740         if (!status)
6741                 status = decode_setclientid(xdr, res);
6742         return status;
6743 }
6744
6745 /*
6746  * Decode SETCLIENTID_CONFIRM response
6747  */
6748 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6749                                             struct xdr_stream *xdr)
6750 {
6751         struct compound_hdr hdr;
6752         int status;
6753
6754         status = decode_compound_hdr(xdr, &hdr);
6755         if (!status)
6756                 status = decode_setclientid_confirm(xdr);
6757         return status;
6758 }
6759
6760 /*
6761  * Decode DELEGRETURN response
6762  */
6763 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6764                                     struct xdr_stream *xdr,
6765                                     struct nfs4_delegreturnres *res)
6766 {
6767         struct compound_hdr hdr;
6768         int status;
6769
6770         status = decode_compound_hdr(xdr, &hdr);
6771         if (status)
6772                 goto out;
6773         status = decode_sequence(xdr, &res->seq_res, rqstp);
6774         if (status)
6775                 goto out;
6776         status = decode_putfh(xdr);
6777         if (status != 0)
6778                 goto out;
6779         status = decode_getfattr(xdr, res->fattr, res->server);
6780         if (status != 0)
6781                 goto out;
6782         status = decode_delegreturn(xdr);
6783 out:
6784         return status;
6785 }
6786
6787 /*
6788  * Decode FS_LOCATIONS response
6789  */
6790 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6791                                      struct xdr_stream *xdr,
6792                                      struct nfs4_fs_locations_res *res)
6793 {
6794         struct compound_hdr hdr;
6795         int status;
6796
6797         status = decode_compound_hdr(xdr, &hdr);
6798         if (status)
6799                 goto out;
6800         status = decode_sequence(xdr, &res->seq_res, req);
6801         if (status)
6802                 goto out;
6803         status = decode_putfh(xdr);
6804         if (status)
6805                 goto out;
6806         status = decode_lookup(xdr);
6807         if (status)
6808                 goto out;
6809         xdr_enter_page(xdr, PAGE_SIZE);
6810         status = decode_getfattr_generic(xdr, &res->fs_locations->fattr,
6811                                          NULL, res->fs_locations,
6812                                          NULL, res->fs_locations->server);
6813 out:
6814         return status;
6815 }
6816
6817 /*
6818  * Decode SECINFO response
6819  */
6820 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6821                                 struct xdr_stream *xdr,
6822                                 struct nfs4_secinfo_res *res)
6823 {
6824         struct compound_hdr hdr;
6825         int status;
6826
6827         status = decode_compound_hdr(xdr, &hdr);
6828         if (status)
6829                 goto out;
6830         status = decode_sequence(xdr, &res->seq_res, rqstp);
6831         if (status)
6832                 goto out;
6833         status = decode_putfh(xdr);
6834         if (status)
6835                 goto out;
6836         status = decode_secinfo(xdr, res);
6837 out:
6838         return status;
6839 }
6840
6841 #if defined(CONFIG_NFS_V4_1)
6842 /*
6843  * Decode BIND_CONN_TO_SESSION response
6844  */
6845 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
6846                                         struct xdr_stream *xdr,
6847                                         void *res)
6848 {
6849         struct compound_hdr hdr;
6850         int status;
6851
6852         status = decode_compound_hdr(xdr, &hdr);
6853         if (!status)
6854                 status = decode_bind_conn_to_session(xdr, res);
6855         return status;
6856 }
6857
6858 /*
6859  * Decode EXCHANGE_ID response
6860  */
6861 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
6862                                     struct xdr_stream *xdr,
6863                                     void *res)
6864 {
6865         struct compound_hdr hdr;
6866         int status;
6867
6868         status = decode_compound_hdr(xdr, &hdr);
6869         if (!status)
6870                 status = decode_exchange_id(xdr, res);
6871         return status;
6872 }
6873
6874 /*
6875  * Decode CREATE_SESSION response
6876  */
6877 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
6878                                        struct xdr_stream *xdr,
6879                                        struct nfs41_create_session_res *res)
6880 {
6881         struct compound_hdr hdr;
6882         int status;
6883
6884         status = decode_compound_hdr(xdr, &hdr);
6885         if (!status)
6886                 status = decode_create_session(xdr, res);
6887         return status;
6888 }
6889
6890 /*
6891  * Decode DESTROY_SESSION response
6892  */
6893 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
6894                                         struct xdr_stream *xdr,
6895                                         void *res)
6896 {
6897         struct compound_hdr hdr;
6898         int status;
6899
6900         status = decode_compound_hdr(xdr, &hdr);
6901         if (!status)
6902                 status = decode_destroy_session(xdr, res);
6903         return status;
6904 }
6905
6906 /*
6907  * Decode DESTROY_CLIENTID response
6908  */
6909 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
6910                                         struct xdr_stream *xdr,
6911                                         void *res)
6912 {
6913         struct compound_hdr hdr;
6914         int status;
6915
6916         status = decode_compound_hdr(xdr, &hdr);
6917         if (!status)
6918                 status = decode_destroy_clientid(xdr, res);
6919         return status;
6920 }
6921
6922 /*
6923  * Decode SEQUENCE response
6924  */
6925 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
6926                                  struct xdr_stream *xdr,
6927                                  struct nfs4_sequence_res *res)
6928 {
6929         struct compound_hdr hdr;
6930         int status;
6931
6932         status = decode_compound_hdr(xdr, &hdr);
6933         if (!status)
6934                 status = decode_sequence(xdr, res, rqstp);
6935         return status;
6936 }
6937
6938 /*
6939  * Decode GET_LEASE_TIME response
6940  */
6941 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
6942                                        struct xdr_stream *xdr,
6943                                        struct nfs4_get_lease_time_res *res)
6944 {
6945         struct compound_hdr hdr;
6946         int status;
6947
6948         status = decode_compound_hdr(xdr, &hdr);
6949         if (!status)
6950                 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
6951         if (!status)
6952                 status = decode_putrootfh(xdr);
6953         if (!status)
6954                 status = decode_fsinfo(xdr, res->lr_fsinfo);
6955         return status;
6956 }
6957
6958 /*
6959  * Decode RECLAIM_COMPLETE response
6960  */
6961 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
6962                                          struct xdr_stream *xdr,
6963                                          struct nfs41_reclaim_complete_res *res)
6964 {
6965         struct compound_hdr hdr;
6966         int status;
6967
6968         status = decode_compound_hdr(xdr, &hdr);
6969         if (!status)
6970                 status = decode_sequence(xdr, &res->seq_res, rqstp);
6971         if (!status)
6972                 status = decode_reclaim_complete(xdr, (void *)NULL);
6973         return status;
6974 }
6975
6976 /*
6977  * Decode GETDEVICELIST response
6978  */
6979 static int nfs4_xdr_dec_getdevicelist(struct rpc_rqst *rqstp,
6980                                       struct xdr_stream *xdr,
6981                                       struct nfs4_getdevicelist_res *res)
6982 {
6983         struct compound_hdr hdr;
6984         int status;
6985
6986         dprintk("encoding getdevicelist!\n");
6987
6988         status = decode_compound_hdr(xdr, &hdr);
6989         if (status != 0)
6990                 goto out;
6991         status = decode_sequence(xdr, &res->seq_res, rqstp);
6992         if (status != 0)
6993                 goto out;
6994         status = decode_putfh(xdr);
6995         if (status != 0)
6996                 goto out;
6997         status = decode_getdevicelist(xdr, res->devlist);
6998 out:
6999         return status;
7000 }
7001
7002 /*
7003  * Decode GETDEVINFO response
7004  */
7005 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7006                                       struct xdr_stream *xdr,
7007                                       struct nfs4_getdeviceinfo_res *res)
7008 {
7009         struct compound_hdr hdr;
7010         int status;
7011
7012         status = decode_compound_hdr(xdr, &hdr);
7013         if (status != 0)
7014                 goto out;
7015         status = decode_sequence(xdr, &res->seq_res, rqstp);
7016         if (status != 0)
7017                 goto out;
7018         status = decode_getdeviceinfo(xdr, res->pdev);
7019 out:
7020         return status;
7021 }
7022
7023 /*
7024  * Decode LAYOUTGET response
7025  */
7026 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7027                                   struct xdr_stream *xdr,
7028                                   struct nfs4_layoutget_res *res)
7029 {
7030         struct compound_hdr hdr;
7031         int status;
7032
7033         status = decode_compound_hdr(xdr, &hdr);
7034         if (status)
7035                 goto out;
7036         status = decode_sequence(xdr, &res->seq_res, rqstp);
7037         if (status)
7038                 goto out;
7039         status = decode_putfh(xdr);
7040         if (status)
7041                 goto out;
7042         status = decode_layoutget(xdr, rqstp, res);
7043 out:
7044         return status;
7045 }
7046
7047 /*
7048  * Decode LAYOUTRETURN response
7049  */
7050 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7051                                      struct xdr_stream *xdr,
7052                                      struct nfs4_layoutreturn_res *res)
7053 {
7054         struct compound_hdr hdr;
7055         int status;
7056
7057         status = decode_compound_hdr(xdr, &hdr);
7058         if (status)
7059                 goto out;
7060         status = decode_sequence(xdr, &res->seq_res, rqstp);
7061         if (status)
7062                 goto out;
7063         status = decode_putfh(xdr);
7064         if (status)
7065                 goto out;
7066         status = decode_layoutreturn(xdr, res);
7067 out:
7068         return status;
7069 }
7070
7071 /*
7072  * Decode LAYOUTCOMMIT response
7073  */
7074 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7075                                      struct xdr_stream *xdr,
7076                                      struct nfs4_layoutcommit_res *res)
7077 {
7078         struct compound_hdr hdr;
7079         int status;
7080
7081         status = decode_compound_hdr(xdr, &hdr);
7082         if (status)
7083                 goto out;
7084         status = decode_sequence(xdr, &res->seq_res, rqstp);
7085         if (status)
7086                 goto out;
7087         status = decode_putfh(xdr);
7088         if (status)
7089                 goto out;
7090         status = decode_layoutcommit(xdr, rqstp, res);
7091         if (status)
7092                 goto out;
7093         decode_getfattr(xdr, res->fattr, res->server);
7094 out:
7095         return status;
7096 }
7097
7098 /*
7099  * Decode SECINFO_NO_NAME response
7100  */
7101 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7102                                         struct xdr_stream *xdr,
7103                                         struct nfs4_secinfo_res *res)
7104 {
7105         struct compound_hdr hdr;
7106         int status;
7107
7108         status = decode_compound_hdr(xdr, &hdr);
7109         if (status)
7110                 goto out;
7111         status = decode_sequence(xdr, &res->seq_res, rqstp);
7112         if (status)
7113                 goto out;
7114         status = decode_putrootfh(xdr);
7115         if (status)
7116                 goto out;
7117         status = decode_secinfo_no_name(xdr, res);
7118 out:
7119         return status;
7120 }
7121
7122 /*
7123  * Decode TEST_STATEID response
7124  */
7125 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7126                                      struct xdr_stream *xdr,
7127                                      struct nfs41_test_stateid_res *res)
7128 {
7129         struct compound_hdr hdr;
7130         int status;
7131
7132         status = decode_compound_hdr(xdr, &hdr);
7133         if (status)
7134                 goto out;
7135         status = decode_sequence(xdr, &res->seq_res, rqstp);
7136         if (status)
7137                 goto out;
7138         status = decode_test_stateid(xdr, res);
7139 out:
7140         return status;
7141 }
7142
7143 /*
7144  * Decode FREE_STATEID response
7145  */
7146 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7147                                      struct xdr_stream *xdr,
7148                                      struct nfs41_free_stateid_res *res)
7149 {
7150         struct compound_hdr hdr;
7151         int status;
7152
7153         status = decode_compound_hdr(xdr, &hdr);
7154         if (status)
7155                 goto out;
7156         status = decode_sequence(xdr, &res->seq_res, rqstp);
7157         if (status)
7158                 goto out;
7159         status = decode_free_stateid(xdr, res);
7160 out:
7161         return status;
7162 }
7163 #endif /* CONFIG_NFS_V4_1 */
7164
7165 /**
7166  * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7167  *                      the local page cache.
7168  * @xdr: XDR stream where entry resides
7169  * @entry: buffer to fill in with entry data
7170  * @plus: boolean indicating whether this should be a readdirplus entry
7171  *
7172  * Returns zero if successful, otherwise a negative errno value is
7173  * returned.
7174  *
7175  * This function is not invoked during READDIR reply decoding, but
7176  * rather whenever an application invokes the getdents(2) system call
7177  * on a directory already in our cache.
7178  */
7179 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7180                        int plus)
7181 {
7182         unsigned int savep;
7183         uint32_t bitmap[3] = {0};
7184         uint32_t len;
7185         __be32 *p = xdr_inline_decode(xdr, 4);
7186         if (unlikely(!p))
7187                 goto out_overflow;
7188         if (*p == xdr_zero) {
7189                 p = xdr_inline_decode(xdr, 4);
7190                 if (unlikely(!p))
7191                         goto out_overflow;
7192                 if (*p == xdr_zero)
7193                         return -EAGAIN;
7194                 entry->eof = 1;
7195                 return -EBADCOOKIE;
7196         }
7197
7198         p = xdr_inline_decode(xdr, 12);
7199         if (unlikely(!p))
7200                 goto out_overflow;
7201         entry->prev_cookie = entry->cookie;
7202         p = xdr_decode_hyper(p, &entry->cookie);
7203         entry->len = be32_to_cpup(p);
7204
7205         p = xdr_inline_decode(xdr, entry->len);
7206         if (unlikely(!p))
7207                 goto out_overflow;
7208         entry->name = (const char *) p;
7209
7210         /*
7211          * In case the server doesn't return an inode number,
7212          * we fake one here.  (We don't use inode number 0,
7213          * since glibc seems to choke on it...)
7214          */
7215         entry->ino = 1;
7216         entry->fattr->valid = 0;
7217
7218         if (decode_attr_bitmap(xdr, bitmap) < 0)
7219                 goto out_overflow;
7220
7221         if (decode_attr_length(xdr, &len, &savep) < 0)
7222                 goto out_overflow;
7223
7224         if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7225                         NULL, entry->label, entry->server) < 0)
7226                 goto out_overflow;
7227         if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7228                 entry->ino = entry->fattr->mounted_on_fileid;
7229         else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7230                 entry->ino = entry->fattr->fileid;
7231
7232         entry->d_type = DT_UNKNOWN;
7233         if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7234                 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7235
7236         return 0;
7237
7238 out_overflow:
7239         print_overflow_msg(__func__, xdr);
7240         return -EAGAIN;
7241 }
7242
7243 /*
7244  * We need to translate between nfs status return values and
7245  * the local errno values which may not be the same.
7246  */
7247 static struct {
7248         int stat;
7249         int errno;
7250 } nfs_errtbl[] = {
7251         { NFS4_OK,              0               },
7252         { NFS4ERR_PERM,         -EPERM          },
7253         { NFS4ERR_NOENT,        -ENOENT         },
7254         { NFS4ERR_IO,           -errno_NFSERR_IO},
7255         { NFS4ERR_NXIO,         -ENXIO          },
7256         { NFS4ERR_ACCESS,       -EACCES         },
7257         { NFS4ERR_EXIST,        -EEXIST         },
7258         { NFS4ERR_XDEV,         -EXDEV          },
7259         { NFS4ERR_NOTDIR,       -ENOTDIR        },
7260         { NFS4ERR_ISDIR,        -EISDIR         },
7261         { NFS4ERR_INVAL,        -EINVAL         },
7262         { NFS4ERR_FBIG,         -EFBIG          },
7263         { NFS4ERR_NOSPC,        -ENOSPC         },
7264         { NFS4ERR_ROFS,         -EROFS          },
7265         { NFS4ERR_MLINK,        -EMLINK         },
7266         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
7267         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
7268         { NFS4ERR_DQUOT,        -EDQUOT         },
7269         { NFS4ERR_STALE,        -ESTALE         },
7270         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
7271         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
7272         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
7273         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
7274         { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
7275         { NFS4ERR_BADTYPE,      -EBADTYPE       },
7276         { NFS4ERR_LOCKED,       -EAGAIN         },
7277         { NFS4ERR_SYMLINK,      -ELOOP          },
7278         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
7279         { NFS4ERR_DEADLOCK,     -EDEADLK        },
7280         { -1,                   -EIO            }
7281 };
7282
7283 /*
7284  * Convert an NFS error code to a local one.
7285  * This one is used jointly by NFSv2 and NFSv3.
7286  */
7287 static int
7288 nfs4_stat_to_errno(int stat)
7289 {
7290         int i;
7291         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7292                 if (nfs_errtbl[i].stat == stat)
7293                         return nfs_errtbl[i].errno;
7294         }
7295         if (stat <= 10000 || stat > 10100) {
7296                 /* The server is looney tunes. */
7297                 return -EREMOTEIO;
7298         }
7299         /* If we cannot translate the error, the recovery routines should
7300          * handle it.
7301          * Note: remaining NFSv4 error codes have values > 10000, so should
7302          * not conflict with native Linux error codes.
7303          */
7304         return -stat;
7305 }
7306
7307 #define PROC(proc, argtype, restype)                            \
7308 [NFSPROC4_CLNT_##proc] = {                                      \
7309         .p_proc   = NFSPROC4_COMPOUND,                          \
7310         .p_encode = (kxdreproc_t)nfs4_xdr_##argtype,            \
7311         .p_decode = (kxdrdproc_t)nfs4_xdr_##restype,            \
7312         .p_arglen = NFS4_##argtype##_sz,                        \
7313         .p_replen = NFS4_##restype##_sz,                        \
7314         .p_statidx = NFSPROC4_CLNT_##proc,                      \
7315         .p_name   = #proc,                                      \
7316 }
7317
7318 struct rpc_procinfo     nfs4_procedures[] = {
7319         PROC(READ,              enc_read,               dec_read),
7320         PROC(WRITE,             enc_write,              dec_write),
7321         PROC(COMMIT,            enc_commit,             dec_commit),
7322         PROC(OPEN,              enc_open,               dec_open),
7323         PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
7324         PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
7325         PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
7326         PROC(CLOSE,             enc_close,              dec_close),
7327         PROC(SETATTR,           enc_setattr,            dec_setattr),
7328         PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
7329         PROC(RENEW,             enc_renew,              dec_renew),
7330         PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
7331         PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7332         PROC(LOCK,              enc_lock,               dec_lock),
7333         PROC(LOCKT,             enc_lockt,              dec_lockt),
7334         PROC(LOCKU,             enc_locku,              dec_locku),
7335         PROC(ACCESS,            enc_access,             dec_access),
7336         PROC(GETATTR,           enc_getattr,            dec_getattr),
7337         PROC(LOOKUP,            enc_lookup,             dec_lookup),
7338         PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
7339         PROC(REMOVE,            enc_remove,             dec_remove),
7340         PROC(RENAME,            enc_rename,             dec_rename),
7341         PROC(LINK,              enc_link,               dec_link),
7342         PROC(SYMLINK,           enc_symlink,            dec_symlink),
7343         PROC(CREATE,            enc_create,             dec_create),
7344         PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
7345         PROC(STATFS,            enc_statfs,             dec_statfs),
7346         PROC(READLINK,          enc_readlink,           dec_readlink),
7347         PROC(READDIR,           enc_readdir,            dec_readdir),
7348         PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
7349         PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
7350         PROC(GETACL,            enc_getacl,             dec_getacl),
7351         PROC(SETACL,            enc_setacl,             dec_setacl),
7352         PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
7353         PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
7354         PROC(SECINFO,           enc_secinfo,            dec_secinfo),
7355 #if defined(CONFIG_NFS_V4_1)
7356         PROC(EXCHANGE_ID,       enc_exchange_id,        dec_exchange_id),
7357         PROC(CREATE_SESSION,    enc_create_session,     dec_create_session),
7358         PROC(DESTROY_SESSION,   enc_destroy_session,    dec_destroy_session),
7359         PROC(SEQUENCE,          enc_sequence,           dec_sequence),
7360         PROC(GET_LEASE_TIME,    enc_get_lease_time,     dec_get_lease_time),
7361         PROC(RECLAIM_COMPLETE,  enc_reclaim_complete,   dec_reclaim_complete),
7362         PROC(GETDEVICEINFO,     enc_getdeviceinfo,      dec_getdeviceinfo),
7363         PROC(LAYOUTGET,         enc_layoutget,          dec_layoutget),
7364         PROC(LAYOUTCOMMIT,      enc_layoutcommit,       dec_layoutcommit),
7365         PROC(LAYOUTRETURN,      enc_layoutreturn,       dec_layoutreturn),
7366         PROC(SECINFO_NO_NAME,   enc_secinfo_no_name,    dec_secinfo_no_name),
7367         PROC(TEST_STATEID,      enc_test_stateid,       dec_test_stateid),
7368         PROC(FREE_STATEID,      enc_free_stateid,       dec_free_stateid),
7369         PROC(GETDEVICELIST,     enc_getdevicelist,      dec_getdevicelist),
7370         PROC(BIND_CONN_TO_SESSION,
7371                         enc_bind_conn_to_session, dec_bind_conn_to_session),
7372         PROC(DESTROY_CLIENTID,  enc_destroy_clientid,   dec_destroy_clientid),
7373 #endif /* CONFIG_NFS_V4_1 */
7374 };
7375
7376 const struct rpc_version nfs_version4 = {
7377         .number                 = 4,
7378         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
7379         .procs                  = nfs4_procedures
7380 };
7381
7382 /*
7383  * Local variables:
7384  *  c-basic-offset: 8
7385  * End:
7386  */