linux/fs/nfs/nfs4xdr.c
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   1/*
   2 *  fs/nfs/nfs4xdr.c
   3 *
   4 *  Client-side XDR for NFSv4.
   5 *
   6 *  Copyright (c) 2002 The Regents of the University of Michigan.
   7 *  All rights reserved.
   8 *
   9 *  Kendrick Smith <kmsmith@umich.edu>
  10 *  Andy Adamson   <andros@umich.edu>
  11 *
  12 *  Redistribution and use in source and binary forms, with or without
  13 *  modification, are permitted provided that the following conditions
  14 *  are met:
  15 *
  16 *  1. Redistributions of source code must retain the above copyright
  17 *     notice, this list of conditions and the following disclaimer.
  18 *  2. Redistributions in binary form must reproduce the above copyright
  19 *     notice, this list of conditions and the following disclaimer in the
  20 *     documentation and/or other materials provided with the distribution.
  21 *  3. Neither the name of the University nor the names of its
  22 *     contributors may be used to endorse or promote products derived
  23 *     from this software without specific prior written permission.
  24 *
  25 *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  26 *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  27 *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  28 *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  29 *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30 *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31 *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  32 *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  33 *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  34 *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  35 *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36 */
  37
  38#include <linux/param.h>
  39#include <linux/time.h>
  40#include <linux/mm.h>
  41#include <linux/errno.h>
  42#include <linux/string.h>
  43#include <linux/in.h>
  44#include <linux/pagemap.h>
  45#include <linux/proc_fs.h>
  46#include <linux/kdev_t.h>
  47#include <linux/module.h>
  48#include <linux/utsname.h>
  49#include <linux/sunrpc/clnt.h>
  50#include <linux/sunrpc/msg_prot.h>
  51#include <linux/sunrpc/gss_api.h>
  52#include <linux/nfs.h>
  53#include <linux/nfs4.h>
  54#include <linux/nfs_fs.h>
  55#include <linux/nfs_idmap.h>
  56
  57#include "nfs4_fs.h"
  58#include "internal.h"
  59#include "pnfs.h"
  60#include "netns.h"
  61
  62#define NFSDBG_FACILITY         NFSDBG_XDR
  63
  64/* Mapping from NFS error code to "errno" error code. */
  65#define errno_NFSERR_IO         EIO
  66
  67static int nfs4_stat_to_errno(int);
  68
  69/* NFSv4 COMPOUND tags are only wanted for debugging purposes */
  70#ifdef DEBUG
  71#define NFS4_MAXTAGLEN          20
  72#else
  73#define NFS4_MAXTAGLEN          0
  74#endif
  75
  76/* lock,open owner id:
  77 * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT  >> 2)
  78 */
  79#define open_owner_id_maxsz     (1 + 2 + 1 + 1 + 2)
  80#define lock_owner_id_maxsz     (1 + 1 + 4)
  81#define decode_lockowner_maxsz  (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  82#define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  83#define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  84#define op_encode_hdr_maxsz     (1)
  85#define op_decode_hdr_maxsz     (2)
  86#define encode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  87#define decode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  88#define encode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  89#define decode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  90#define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
  91                                (NFS4_FHSIZE >> 2))
  92#define decode_putfh_maxsz      (op_decode_hdr_maxsz)
  93#define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
  94#define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
  95#define encode_getfh_maxsz      (op_encode_hdr_maxsz)
  96#define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
  97                                ((3+NFS4_FHSIZE) >> 2))
  98#define nfs4_fattr_bitmap_maxsz 4
  99#define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
 100#define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
 101#define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
 102#define nfs4_owner_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 103#define nfs4_group_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 104/* We support only one layout type per file system */
 105#define decode_mdsthreshold_maxsz (1 + 1 + nfs4_fattr_bitmap_maxsz + 1 + 8)
 106/* This is based on getfattr, which uses the most attributes: */
 107#define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
 108                                3 + 3 + 3 + nfs4_owner_maxsz + \
 109                                nfs4_group_maxsz + decode_mdsthreshold_maxsz))
 110#define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
 111                                nfs4_fattr_value_maxsz)
 112#define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
 113#define encode_attrs_maxsz      (nfs4_fattr_bitmap_maxsz + \
 114                                 1 + 2 + 1 + \
 115                                nfs4_owner_maxsz + \
 116                                nfs4_group_maxsz + \
 117                                4 + 4)
 118#define encode_savefh_maxsz     (op_encode_hdr_maxsz)
 119#define decode_savefh_maxsz     (op_decode_hdr_maxsz)
 120#define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
 121#define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 122#define encode_fsinfo_maxsz     (encode_getattr_maxsz)
 123/* The 5 accounts for the PNFS attributes, and assumes that at most three
 124 * layout types will be returned.
 125 */
 126#define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + \
 127                                 nfs4_fattr_bitmap_maxsz + 4 + 8 + 5)
 128#define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 129#define decode_renew_maxsz      (op_decode_hdr_maxsz)
 130#define encode_setclientid_maxsz \
 131                                (op_encode_hdr_maxsz + \
 132                                XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 133                                XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
 134                                1 /* sc_prog */ + \
 135                                XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 136                                XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
 137                                1) /* sc_cb_ident */
 138#define decode_setclientid_maxsz \
 139                                (op_decode_hdr_maxsz + \
 140                                2 + \
 141                                1024) /* large value for CLID_INUSE */
 142#define encode_setclientid_confirm_maxsz \
 143                                (op_encode_hdr_maxsz + \
 144                                3 + (NFS4_VERIFIER_SIZE >> 2))
 145#define decode_setclientid_confirm_maxsz \
 146                                (op_decode_hdr_maxsz)
 147#define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
 148#define decode_lookup_maxsz     (op_decode_hdr_maxsz)
 149#define encode_share_access_maxsz \
 150                                (2)
 151#define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
 152#define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
 153#define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
 154#define encode_open_maxsz       (op_encode_hdr_maxsz + \
 155                                2 + encode_share_access_maxsz + 2 + \
 156                                open_owner_id_maxsz + \
 157                                encode_opentype_maxsz + \
 158                                encode_claim_null_maxsz)
 159#define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
 160#define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
 161                                decode_ace_maxsz)
 162#define decode_change_info_maxsz        (5)
 163#define decode_open_maxsz       (op_decode_hdr_maxsz + \
 164                                decode_stateid_maxsz + \
 165                                decode_change_info_maxsz + 1 + \
 166                                nfs4_fattr_bitmap_maxsz + \
 167                                decode_delegation_maxsz)
 168#define encode_open_confirm_maxsz \
 169                                (op_encode_hdr_maxsz + \
 170                                 encode_stateid_maxsz + 1)
 171#define decode_open_confirm_maxsz \
 172                                (op_decode_hdr_maxsz + \
 173                                 decode_stateid_maxsz)
 174#define encode_open_downgrade_maxsz \
 175                                (op_encode_hdr_maxsz + \
 176                                 encode_stateid_maxsz + 1 + \
 177                                 encode_share_access_maxsz)
 178#define decode_open_downgrade_maxsz \
 179                                (op_decode_hdr_maxsz + \
 180                                 decode_stateid_maxsz)
 181#define encode_close_maxsz      (op_encode_hdr_maxsz + \
 182                                 1 + encode_stateid_maxsz)
 183#define decode_close_maxsz      (op_decode_hdr_maxsz + \
 184                                 decode_stateid_maxsz)
 185#define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
 186                                 encode_stateid_maxsz + \
 187                                 encode_attrs_maxsz)
 188#define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
 189                                 nfs4_fattr_bitmap_maxsz)
 190#define encode_read_maxsz       (op_encode_hdr_maxsz + \
 191                                 encode_stateid_maxsz + 3)
 192#define decode_read_maxsz       (op_decode_hdr_maxsz + 2)
 193#define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
 194                                 2 + encode_verifier_maxsz + 5)
 195#define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
 196                                 decode_verifier_maxsz)
 197#define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 198#define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1)
 199#define encode_write_maxsz      (op_encode_hdr_maxsz + \
 200                                 encode_stateid_maxsz + 4)
 201#define decode_write_maxsz      (op_decode_hdr_maxsz + \
 202                                 2 + decode_verifier_maxsz)
 203#define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
 204#define decode_commit_maxsz     (op_decode_hdr_maxsz + \
 205                                 decode_verifier_maxsz)
 206#define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 207                                nfs4_name_maxsz)
 208#define decode_remove_maxsz     (op_decode_hdr_maxsz + \
 209                                 decode_change_info_maxsz)
 210#define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 211                                2 * nfs4_name_maxsz)
 212#define decode_rename_maxsz     (op_decode_hdr_maxsz + \
 213                                 decode_change_info_maxsz + \
 214                                 decode_change_info_maxsz)
 215#define encode_link_maxsz       (op_encode_hdr_maxsz + \
 216                                nfs4_name_maxsz)
 217#define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
 218#define encode_lockowner_maxsz  (7)
 219#define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 220                                 7 + \
 221                                 1 + encode_stateid_maxsz + 1 + \
 222                                 encode_lockowner_maxsz)
 223#define decode_lock_denied_maxsz \
 224                                (8 + decode_lockowner_maxsz)
 225#define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 226                                 decode_lock_denied_maxsz)
 227#define encode_lockt_maxsz      (op_encode_hdr_maxsz + 5 + \
 228                                encode_lockowner_maxsz)
 229#define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 230                                 decode_lock_denied_maxsz)
 231#define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 232                                 encode_stateid_maxsz + \
 233                                 4)
 234#define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 235                                 decode_stateid_maxsz)
 236#define encode_release_lockowner_maxsz \
 237                                (op_encode_hdr_maxsz + \
 238                                 encode_lockowner_maxsz)
 239#define decode_release_lockowner_maxsz \
 240                                (op_decode_hdr_maxsz)
 241#define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 242#define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 243#define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 244                                1 + nfs4_name_maxsz + \
 245                                1 + \
 246                                nfs4_fattr_maxsz)
 247#define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 248#define encode_create_maxsz     (op_encode_hdr_maxsz + \
 249                                1 + 2 + nfs4_name_maxsz + \
 250                                encode_attrs_maxsz)
 251#define decode_create_maxsz     (op_decode_hdr_maxsz + \
 252                                decode_change_info_maxsz + \
 253                                nfs4_fattr_bitmap_maxsz)
 254#define encode_statfs_maxsz     (encode_getattr_maxsz)
 255#define decode_statfs_maxsz     (decode_getattr_maxsz)
 256#define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 257#define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 258#define encode_getacl_maxsz     (encode_getattr_maxsz)
 259#define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 260                                 nfs4_fattr_bitmap_maxsz + 1)
 261#define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 262                                 encode_stateid_maxsz + 3)
 263#define decode_setacl_maxsz     (decode_setattr_maxsz)
 264#define encode_fs_locations_maxsz \
 265                                (encode_getattr_maxsz)
 266#define decode_fs_locations_maxsz \
 267                                (0)
 268#define encode_secinfo_maxsz    (op_encode_hdr_maxsz + nfs4_name_maxsz)
 269#define decode_secinfo_maxsz    (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
 270
 271#if defined(CONFIG_NFS_V4_1)
 272#define NFS4_MAX_MACHINE_NAME_LEN (64)
 273
 274#define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
 275                                encode_verifier_maxsz + \
 276                                1 /* co_ownerid.len */ + \
 277                                XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
 278                                1 /* flags */ + \
 279                                1 /* spa_how */ + \
 280                                0 /* SP4_NONE (for now) */ + \
 281                                1 /* implementation id array of size 1 */ + \
 282                                1 /* nii_domain */ + \
 283                                XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 284                                1 /* nii_name */ + \
 285                                XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 286                                3 /* nii_date */)
 287#define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
 288                                2 /* eir_clientid */ + \
 289                                1 /* eir_sequenceid */ + \
 290                                1 /* eir_flags */ + \
 291                                1 /* spr_how */ + \
 292                                0 /* SP4_NONE (for now) */ + \
 293                                2 /* eir_server_owner.so_minor_id */ + \
 294                                /* eir_server_owner.so_major_id<> */ \
 295                                XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 296                                /* eir_server_scope<> */ \
 297                                XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 298                                1 /* eir_server_impl_id array length */ + \
 299                                1 /* nii_domain */ + \
 300                                XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 301                                1 /* nii_name */ + \
 302                                XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 303                                3 /* nii_date */)
 304#define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
 305#define decode_channel_attrs_maxsz  (6 + \
 306                                     1 /* ca_rdma_ird.len */ + \
 307                                     1 /* ca_rdma_ird */)
 308#define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
 309                                     2 /* csa_clientid */ + \
 310                                     1 /* csa_sequence */ + \
 311                                     1 /* csa_flags */ + \
 312                                     encode_channel_attrs_maxsz + \
 313                                     encode_channel_attrs_maxsz + \
 314                                     1 /* csa_cb_program */ + \
 315                                     1 /* csa_sec_parms.len (1) */ + \
 316                                     1 /* cb_secflavor (AUTH_SYS) */ + \
 317                                     1 /* stamp */ + \
 318                                     1 /* machinename.len */ + \
 319                                     XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
 320                                     1 /* uid */ + \
 321                                     1 /* gid */ + \
 322                                     1 /* gids.len (0) */)
 323#define decode_create_session_maxsz  (op_decode_hdr_maxsz +     \
 324                                     XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 325                                     1 /* csr_sequence */ + \
 326                                     1 /* csr_flags */ + \
 327                                     decode_channel_attrs_maxsz + \
 328                                     decode_channel_attrs_maxsz)
 329#define encode_bind_conn_to_session_maxsz  (op_encode_hdr_maxsz + \
 330                                     /* bctsa_sessid */ \
 331                                     XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 332                                     1 /* bctsa_dir */ + \
 333                                     1 /* bctsa_use_conn_in_rdma_mode */)
 334#define decode_bind_conn_to_session_maxsz  (op_decode_hdr_maxsz +       \
 335                                     /* bctsr_sessid */ \
 336                                     XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 337                                     1 /* bctsr_dir */ + \
 338                                     1 /* bctsr_use_conn_in_rdma_mode */)
 339#define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
 340#define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
 341#define encode_destroy_clientid_maxsz   (op_encode_hdr_maxsz + 2)
 342#define decode_destroy_clientid_maxsz   (op_decode_hdr_maxsz)
 343#define encode_sequence_maxsz   (op_encode_hdr_maxsz + \
 344                                XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
 345#define decode_sequence_maxsz   (op_decode_hdr_maxsz + \
 346                                XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
 347#define encode_reclaim_complete_maxsz   (op_encode_hdr_maxsz + 4)
 348#define decode_reclaim_complete_maxsz   (op_decode_hdr_maxsz + 4)
 349#define encode_getdevicelist_maxsz (op_encode_hdr_maxsz + 4 + \
 350                                encode_verifier_maxsz)
 351#define decode_getdevicelist_maxsz (op_decode_hdr_maxsz + \
 352                                2 /* nfs_cookie4 gdlr_cookie */ + \
 353                                decode_verifier_maxsz \
 354                                  /* verifier4 gdlr_verifier */ + \
 355                                1 /* gdlr_deviceid_list count */ + \
 356                                XDR_QUADLEN(NFS4_PNFS_GETDEVLIST_MAXNUM * \
 357                                            NFS4_DEVICEID4_SIZE) \
 358                                  /* gdlr_deviceid_list */ + \
 359                                1 /* bool gdlr_eof */)
 360#define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + 4 + \
 361                                XDR_QUADLEN(NFS4_DEVICEID4_SIZE))
 362#define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
 363                                1 /* layout type */ + \
 364                                1 /* opaque devaddr4 length */ + \
 365                                  /* devaddr4 payload is read into page */ \
 366                                1 /* notification bitmap length */ + \
 367                                1 /* notification bitmap */)
 368#define encode_layoutget_maxsz  (op_encode_hdr_maxsz + 10 + \
 369                                encode_stateid_maxsz)
 370#define decode_layoutget_maxsz  (op_decode_hdr_maxsz + 8 + \
 371                                decode_stateid_maxsz + \
 372                                XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
 373#define encode_layoutcommit_maxsz (op_encode_hdr_maxsz +          \
 374                                2 /* offset */ + \
 375                                2 /* length */ + \
 376                                1 /* reclaim */ + \
 377                                encode_stateid_maxsz + \
 378                                1 /* new offset (true) */ + \
 379                                2 /* last byte written */ + \
 380                                1 /* nt_timechanged (false) */ + \
 381                                1 /* layoutupdate4 layout type */ + \
 382                                1 /* NULL filelayout layoutupdate4 payload */)
 383#define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
 384#define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
 385                                encode_stateid_maxsz + \
 386                                1 /* FIXME: opaque lrf_body always empty at the moment */)
 387#define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
 388                                1 + decode_stateid_maxsz)
 389#define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
 390#define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
 391#define encode_test_stateid_maxsz       (op_encode_hdr_maxsz + 2 + \
 392                                         XDR_QUADLEN(NFS4_STATEID_SIZE))
 393#define decode_test_stateid_maxsz       (op_decode_hdr_maxsz + 2 + 1)
 394#define encode_free_stateid_maxsz       (op_encode_hdr_maxsz + 1 + \
 395                                         XDR_QUADLEN(NFS4_STATEID_SIZE))
 396#define decode_free_stateid_maxsz       (op_decode_hdr_maxsz + 1)
 397#else /* CONFIG_NFS_V4_1 */
 398#define encode_sequence_maxsz   0
 399#define decode_sequence_maxsz   0
 400#endif /* CONFIG_NFS_V4_1 */
 401
 402#define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 403#define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 404#define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 405                                encode_sequence_maxsz + \
 406                                encode_putfh_maxsz + \
 407                                encode_read_maxsz)
 408#define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 409                                decode_sequence_maxsz + \
 410                                decode_putfh_maxsz + \
 411                                decode_read_maxsz)
 412#define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 413                                encode_sequence_maxsz + \
 414                                encode_putfh_maxsz + \
 415                                encode_readlink_maxsz)
 416#define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 417                                decode_sequence_maxsz + \
 418                                decode_putfh_maxsz + \
 419                                decode_readlink_maxsz)
 420#define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 421                                encode_sequence_maxsz + \
 422                                encode_putfh_maxsz + \
 423                                encode_readdir_maxsz)
 424#define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 425                                decode_sequence_maxsz + \
 426                                decode_putfh_maxsz + \
 427                                decode_readdir_maxsz)
 428#define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 429                                encode_sequence_maxsz + \
 430                                encode_putfh_maxsz + \
 431                                encode_write_maxsz + \
 432                                encode_getattr_maxsz)
 433#define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 434                                decode_sequence_maxsz + \
 435                                decode_putfh_maxsz + \
 436                                decode_write_maxsz + \
 437                                decode_getattr_maxsz)
 438#define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 439                                encode_sequence_maxsz + \
 440                                encode_putfh_maxsz + \
 441                                encode_commit_maxsz)
 442#define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 443                                decode_sequence_maxsz + \
 444                                decode_putfh_maxsz + \
 445                                decode_commit_maxsz)
 446#define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 447                                encode_sequence_maxsz + \
 448                                encode_putfh_maxsz + \
 449                                encode_open_maxsz + \
 450                                encode_access_maxsz + \
 451                                encode_getfh_maxsz + \
 452                                encode_getattr_maxsz)
 453#define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 454                                decode_sequence_maxsz + \
 455                                decode_putfh_maxsz + \
 456                                decode_open_maxsz + \
 457                                decode_access_maxsz + \
 458                                decode_getfh_maxsz + \
 459                                decode_getattr_maxsz)
 460#define NFS4_enc_open_confirm_sz \
 461                                (compound_encode_hdr_maxsz + \
 462                                 encode_putfh_maxsz + \
 463                                 encode_open_confirm_maxsz)
 464#define NFS4_dec_open_confirm_sz \
 465                                (compound_decode_hdr_maxsz + \
 466                                 decode_putfh_maxsz + \
 467                                 decode_open_confirm_maxsz)
 468#define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 469                                        encode_sequence_maxsz + \
 470                                        encode_putfh_maxsz + \
 471                                        encode_open_maxsz + \
 472                                        encode_access_maxsz + \
 473                                        encode_getattr_maxsz)
 474#define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 475                                        decode_sequence_maxsz + \
 476                                        decode_putfh_maxsz + \
 477                                        decode_open_maxsz + \
 478                                        decode_access_maxsz + \
 479                                        decode_getattr_maxsz)
 480#define NFS4_enc_open_downgrade_sz \
 481                                (compound_encode_hdr_maxsz + \
 482                                 encode_sequence_maxsz + \
 483                                 encode_putfh_maxsz + \
 484                                 encode_open_downgrade_maxsz + \
 485                                 encode_getattr_maxsz)
 486#define NFS4_dec_open_downgrade_sz \
 487                                (compound_decode_hdr_maxsz + \
 488                                 decode_sequence_maxsz + \
 489                                 decode_putfh_maxsz + \
 490                                 decode_open_downgrade_maxsz + \
 491                                 decode_getattr_maxsz)
 492#define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 493                                 encode_sequence_maxsz + \
 494                                 encode_putfh_maxsz + \
 495                                 encode_close_maxsz + \
 496                                 encode_getattr_maxsz)
 497#define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 498                                 decode_sequence_maxsz + \
 499                                 decode_putfh_maxsz + \
 500                                 decode_close_maxsz + \
 501                                 decode_getattr_maxsz)
 502#define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 503                                 encode_sequence_maxsz + \
 504                                 encode_putfh_maxsz + \
 505                                 encode_setattr_maxsz + \
 506                                 encode_getattr_maxsz)
 507#define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 508                                 decode_sequence_maxsz + \
 509                                 decode_putfh_maxsz + \
 510                                 decode_setattr_maxsz + \
 511                                 decode_getattr_maxsz)
 512#define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 513                                encode_sequence_maxsz + \
 514                                encode_putfh_maxsz + \
 515                                encode_fsinfo_maxsz)
 516#define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 517                                decode_sequence_maxsz + \
 518                                decode_putfh_maxsz + \
 519                                decode_fsinfo_maxsz)
 520#define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 521                                encode_renew_maxsz)
 522#define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 523                                decode_renew_maxsz)
 524#define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 525                                encode_setclientid_maxsz)
 526#define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 527                                decode_setclientid_maxsz)
 528#define NFS4_enc_setclientid_confirm_sz \
 529                                (compound_encode_hdr_maxsz + \
 530                                encode_setclientid_confirm_maxsz + \
 531                                encode_putrootfh_maxsz + \
 532                                encode_fsinfo_maxsz)
 533#define NFS4_dec_setclientid_confirm_sz \
 534                                (compound_decode_hdr_maxsz + \
 535                                decode_setclientid_confirm_maxsz + \
 536                                decode_putrootfh_maxsz + \
 537                                decode_fsinfo_maxsz)
 538#define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 539                                encode_sequence_maxsz + \
 540                                encode_putfh_maxsz + \
 541                                encode_lock_maxsz)
 542#define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 543                                decode_sequence_maxsz + \
 544                                decode_putfh_maxsz + \
 545                                decode_lock_maxsz)
 546#define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 547                                encode_sequence_maxsz + \
 548                                encode_putfh_maxsz + \
 549                                encode_lockt_maxsz)
 550#define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 551                                 decode_sequence_maxsz + \
 552                                 decode_putfh_maxsz + \
 553                                 decode_lockt_maxsz)
 554#define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 555                                encode_sequence_maxsz + \
 556                                encode_putfh_maxsz + \
 557                                encode_locku_maxsz)
 558#define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 559                                decode_sequence_maxsz + \
 560                                decode_putfh_maxsz + \
 561                                decode_locku_maxsz)
 562#define NFS4_enc_release_lockowner_sz \
 563                                (compound_encode_hdr_maxsz + \
 564                                 encode_lockowner_maxsz)
 565#define NFS4_dec_release_lockowner_sz \
 566                                (compound_decode_hdr_maxsz + \
 567                                 decode_lockowner_maxsz)
 568#define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 569                                encode_sequence_maxsz + \
 570                                encode_putfh_maxsz + \
 571                                encode_access_maxsz + \
 572                                encode_getattr_maxsz)
 573#define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 574                                decode_sequence_maxsz + \
 575                                decode_putfh_maxsz + \
 576                                decode_access_maxsz + \
 577                                decode_getattr_maxsz)
 578#define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 579                                encode_sequence_maxsz + \
 580                                encode_putfh_maxsz + \
 581                                encode_getattr_maxsz)
 582#define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 583                                decode_sequence_maxsz + \
 584                                decode_putfh_maxsz + \
 585                                decode_getattr_maxsz)
 586#define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 587                                encode_sequence_maxsz + \
 588                                encode_putfh_maxsz + \
 589                                encode_lookup_maxsz + \
 590                                encode_getattr_maxsz + \
 591                                encode_getfh_maxsz)
 592#define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 593                                decode_sequence_maxsz + \
 594                                decode_putfh_maxsz + \
 595                                decode_lookup_maxsz + \
 596                                decode_getattr_maxsz + \
 597                                decode_getfh_maxsz)
 598#define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 599                                encode_sequence_maxsz + \
 600                                encode_putrootfh_maxsz + \
 601                                encode_getattr_maxsz + \
 602                                encode_getfh_maxsz)
 603#define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 604                                decode_sequence_maxsz + \
 605                                decode_putrootfh_maxsz + \
 606                                decode_getattr_maxsz + \
 607                                decode_getfh_maxsz)
 608#define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 609                                encode_sequence_maxsz + \
 610                                encode_putfh_maxsz + \
 611                                encode_remove_maxsz)
 612#define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 613                                decode_sequence_maxsz + \
 614                                decode_putfh_maxsz + \
 615                                decode_remove_maxsz)
 616#define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 617                                encode_sequence_maxsz + \
 618                                encode_putfh_maxsz + \
 619                                encode_savefh_maxsz + \
 620                                encode_putfh_maxsz + \
 621                                encode_rename_maxsz)
 622#define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 623                                decode_sequence_maxsz + \
 624                                decode_putfh_maxsz + \
 625                                decode_savefh_maxsz + \
 626                                decode_putfh_maxsz + \
 627                                decode_rename_maxsz)
 628#define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 629                                encode_sequence_maxsz + \
 630                                encode_putfh_maxsz + \
 631                                encode_savefh_maxsz + \
 632                                encode_putfh_maxsz + \
 633                                encode_link_maxsz + \
 634                                encode_restorefh_maxsz + \
 635                                encode_getattr_maxsz)
 636#define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 637                                decode_sequence_maxsz + \
 638                                decode_putfh_maxsz + \
 639                                decode_savefh_maxsz + \
 640                                decode_putfh_maxsz + \
 641                                decode_link_maxsz + \
 642                                decode_restorefh_maxsz + \
 643                                decode_getattr_maxsz)
 644#define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 645                                encode_sequence_maxsz + \
 646                                encode_putfh_maxsz + \
 647                                encode_symlink_maxsz + \
 648                                encode_getattr_maxsz + \
 649                                encode_getfh_maxsz)
 650#define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 651                                decode_sequence_maxsz + \
 652                                decode_putfh_maxsz + \
 653                                decode_symlink_maxsz + \
 654                                decode_getattr_maxsz + \
 655                                decode_getfh_maxsz)
 656#define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 657                                encode_sequence_maxsz + \
 658                                encode_putfh_maxsz + \
 659                                encode_create_maxsz + \
 660                                encode_getfh_maxsz + \
 661                                encode_getattr_maxsz)
 662#define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 663                                decode_sequence_maxsz + \
 664                                decode_putfh_maxsz + \
 665                                decode_create_maxsz + \
 666                                decode_getfh_maxsz + \
 667                                decode_getattr_maxsz)
 668#define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 669                                encode_sequence_maxsz + \
 670                                encode_putfh_maxsz + \
 671                                encode_getattr_maxsz)
 672#define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 673                                decode_sequence_maxsz + \
 674                                decode_putfh_maxsz + \
 675                                decode_getattr_maxsz)
 676#define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 677                                encode_sequence_maxsz + \
 678                                encode_putfh_maxsz + \
 679                                encode_statfs_maxsz)
 680#define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 681                                decode_sequence_maxsz + \
 682                                decode_putfh_maxsz + \
 683                                decode_statfs_maxsz)
 684#define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 685                                encode_sequence_maxsz + \
 686                                encode_putfh_maxsz + \
 687                                encode_getattr_maxsz)
 688#define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 689                                decode_sequence_maxsz + \
 690                                decode_putfh_maxsz + \
 691                                decode_getattr_maxsz)
 692#define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 693                                encode_sequence_maxsz + \
 694                                encode_putfh_maxsz + \
 695                                encode_delegreturn_maxsz + \
 696                                encode_getattr_maxsz)
 697#define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 698                                decode_sequence_maxsz + \
 699                                decode_delegreturn_maxsz + \
 700                                decode_getattr_maxsz)
 701#define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 702                                encode_sequence_maxsz + \
 703                                encode_putfh_maxsz + \
 704                                encode_getacl_maxsz)
 705#define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 706                                decode_sequence_maxsz + \
 707                                decode_putfh_maxsz + \
 708                                decode_getacl_maxsz)
 709#define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 710                                encode_sequence_maxsz + \
 711                                encode_putfh_maxsz + \
 712                                encode_setacl_maxsz)
 713#define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 714                                decode_sequence_maxsz + \
 715                                decode_putfh_maxsz + \
 716                                decode_setacl_maxsz)
 717#define NFS4_enc_fs_locations_sz \
 718                                (compound_encode_hdr_maxsz + \
 719                                 encode_sequence_maxsz + \
 720                                 encode_putfh_maxsz + \
 721                                 encode_lookup_maxsz + \
 722                                 encode_fs_locations_maxsz)
 723#define NFS4_dec_fs_locations_sz \
 724                                (compound_decode_hdr_maxsz + \
 725                                 decode_sequence_maxsz + \
 726                                 decode_putfh_maxsz + \
 727                                 decode_lookup_maxsz + \
 728                                 decode_fs_locations_maxsz)
 729#define NFS4_enc_secinfo_sz     (compound_encode_hdr_maxsz + \
 730                                encode_sequence_maxsz + \
 731                                encode_putfh_maxsz + \
 732                                encode_secinfo_maxsz)
 733#define NFS4_dec_secinfo_sz     (compound_decode_hdr_maxsz + \
 734                                decode_sequence_maxsz + \
 735                                decode_putfh_maxsz + \
 736                                decode_secinfo_maxsz)
 737#if defined(CONFIG_NFS_V4_1)
 738#define NFS4_enc_bind_conn_to_session_sz \
 739                                (compound_encode_hdr_maxsz + \
 740                                 encode_bind_conn_to_session_maxsz)
 741#define NFS4_dec_bind_conn_to_session_sz \
 742                                (compound_decode_hdr_maxsz + \
 743                                 decode_bind_conn_to_session_maxsz)
 744#define NFS4_enc_exchange_id_sz \
 745                                (compound_encode_hdr_maxsz + \
 746                                 encode_exchange_id_maxsz)
 747#define NFS4_dec_exchange_id_sz \
 748                                (compound_decode_hdr_maxsz + \
 749                                 decode_exchange_id_maxsz)
 750#define NFS4_enc_create_session_sz \
 751                                (compound_encode_hdr_maxsz + \
 752                                 encode_create_session_maxsz)
 753#define NFS4_dec_create_session_sz \
 754                                (compound_decode_hdr_maxsz + \
 755                                 decode_create_session_maxsz)
 756#define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
 757                                         encode_destroy_session_maxsz)
 758#define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
 759                                         decode_destroy_session_maxsz)
 760#define NFS4_enc_destroy_clientid_sz    (compound_encode_hdr_maxsz + \
 761                                         encode_destroy_clientid_maxsz)
 762#define NFS4_dec_destroy_clientid_sz    (compound_decode_hdr_maxsz + \
 763                                         decode_destroy_clientid_maxsz)
 764#define NFS4_enc_sequence_sz \
 765                                (compound_decode_hdr_maxsz + \
 766                                 encode_sequence_maxsz)
 767#define NFS4_dec_sequence_sz \
 768                                (compound_decode_hdr_maxsz + \
 769                                 decode_sequence_maxsz)
 770#define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
 771                                         encode_sequence_maxsz + \
 772                                         encode_putrootfh_maxsz + \
 773                                         encode_fsinfo_maxsz)
 774#define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
 775                                         decode_sequence_maxsz + \
 776                                         decode_putrootfh_maxsz + \
 777                                         decode_fsinfo_maxsz)
 778#define NFS4_enc_reclaim_complete_sz    (compound_encode_hdr_maxsz + \
 779                                         encode_sequence_maxsz + \
 780                                         encode_reclaim_complete_maxsz)
 781#define NFS4_dec_reclaim_complete_sz    (compound_decode_hdr_maxsz + \
 782                                         decode_sequence_maxsz + \
 783                                         decode_reclaim_complete_maxsz)
 784#define NFS4_enc_getdevicelist_sz (compound_encode_hdr_maxsz + \
 785                                encode_sequence_maxsz + \
 786                                encode_putfh_maxsz + \
 787                                encode_getdevicelist_maxsz)
 788#define NFS4_dec_getdevicelist_sz (compound_decode_hdr_maxsz + \
 789                                decode_sequence_maxsz + \
 790                                decode_putfh_maxsz + \
 791                                decode_getdevicelist_maxsz)
 792#define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
 793                                encode_sequence_maxsz +\
 794                                encode_getdeviceinfo_maxsz)
 795#define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
 796                                decode_sequence_maxsz + \
 797                                decode_getdeviceinfo_maxsz)
 798#define NFS4_enc_layoutget_sz   (compound_encode_hdr_maxsz + \
 799                                encode_sequence_maxsz + \
 800                                encode_putfh_maxsz +        \
 801                                encode_layoutget_maxsz)
 802#define NFS4_dec_layoutget_sz   (compound_decode_hdr_maxsz + \
 803                                decode_sequence_maxsz + \
 804                                decode_putfh_maxsz +        \
 805                                decode_layoutget_maxsz)
 806#define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
 807                                encode_sequence_maxsz +\
 808                                encode_putfh_maxsz + \
 809                                encode_layoutcommit_maxsz + \
 810                                encode_getattr_maxsz)
 811#define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
 812                                decode_sequence_maxsz + \
 813                                decode_putfh_maxsz + \
 814                                decode_layoutcommit_maxsz + \
 815                                decode_getattr_maxsz)
 816#define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
 817                                encode_sequence_maxsz + \
 818                                encode_putfh_maxsz + \
 819                                encode_layoutreturn_maxsz)
 820#define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
 821                                decode_sequence_maxsz + \
 822                                decode_putfh_maxsz + \
 823                                decode_layoutreturn_maxsz)
 824#define NFS4_enc_secinfo_no_name_sz     (compound_encode_hdr_maxsz + \
 825                                        encode_sequence_maxsz + \
 826                                        encode_putrootfh_maxsz +\
 827                                        encode_secinfo_no_name_maxsz)
 828#define NFS4_dec_secinfo_no_name_sz     (compound_decode_hdr_maxsz + \
 829                                        decode_sequence_maxsz + \
 830                                        decode_putrootfh_maxsz + \
 831                                        decode_secinfo_no_name_maxsz)
 832#define NFS4_enc_test_stateid_sz        (compound_encode_hdr_maxsz + \
 833                                         encode_sequence_maxsz + \
 834                                         encode_test_stateid_maxsz)
 835#define NFS4_dec_test_stateid_sz        (compound_decode_hdr_maxsz + \
 836                                         decode_sequence_maxsz + \
 837                                         decode_test_stateid_maxsz)
 838#define NFS4_enc_free_stateid_sz        (compound_encode_hdr_maxsz + \
 839                                         encode_sequence_maxsz + \
 840                                         encode_free_stateid_maxsz)
 841#define NFS4_dec_free_stateid_sz        (compound_decode_hdr_maxsz + \
 842                                         decode_sequence_maxsz + \
 843                                         decode_free_stateid_maxsz)
 844
 845const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 846                                      compound_encode_hdr_maxsz +
 847                                      encode_sequence_maxsz +
 848                                      encode_putfh_maxsz +
 849                                      encode_getattr_maxsz) *
 850                                     XDR_UNIT);
 851
 852const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 853                                     compound_decode_hdr_maxsz +
 854                                     decode_sequence_maxsz +
 855                                     decode_putfh_maxsz) *
 856                                    XDR_UNIT);
 857#endif /* CONFIG_NFS_V4_1 */
 858
 859static const umode_t nfs_type2fmt[] = {
 860        [NF4BAD] = 0,
 861        [NF4REG] = S_IFREG,
 862        [NF4DIR] = S_IFDIR,
 863        [NF4BLK] = S_IFBLK,
 864        [NF4CHR] = S_IFCHR,
 865        [NF4LNK] = S_IFLNK,
 866        [NF4SOCK] = S_IFSOCK,
 867        [NF4FIFO] = S_IFIFO,
 868        [NF4ATTRDIR] = 0,
 869        [NF4NAMEDATTR] = 0,
 870};
 871
 872struct compound_hdr {
 873        int32_t         status;
 874        uint32_t        nops;
 875        __be32 *        nops_p;
 876        uint32_t        taglen;
 877        char *          tag;
 878        uint32_t        replen;         /* expected reply words */
 879        u32             minorversion;
 880};
 881
 882static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
 883{
 884        __be32 *p = xdr_reserve_space(xdr, nbytes);
 885        BUG_ON(!p);
 886        return p;
 887}
 888
 889static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
 890{
 891        __be32 *p;
 892
 893        p = xdr_reserve_space(xdr, len);
 894        xdr_encode_opaque_fixed(p, buf, len);
 895}
 896
 897static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 898{
 899        __be32 *p;
 900
 901        p = reserve_space(xdr, 4 + len);
 902        xdr_encode_opaque(p, str, len);
 903}
 904
 905static void encode_uint32(struct xdr_stream *xdr, u32 n)
 906{
 907        __be32 *p;
 908
 909        p = reserve_space(xdr, 4);
 910        *p = cpu_to_be32(n);
 911}
 912
 913static void encode_uint64(struct xdr_stream *xdr, u64 n)
 914{
 915        __be32 *p;
 916
 917        p = reserve_space(xdr, 8);
 918        xdr_encode_hyper(p, n);
 919}
 920
 921static void encode_nfs4_seqid(struct xdr_stream *xdr,
 922                const struct nfs_seqid *seqid)
 923{
 924        encode_uint32(xdr, seqid->sequence->counter);
 925}
 926
 927static void encode_compound_hdr(struct xdr_stream *xdr,
 928                                struct rpc_rqst *req,
 929                                struct compound_hdr *hdr)
 930{
 931        __be32 *p;
 932        struct rpc_auth *auth = req->rq_cred->cr_auth;
 933
 934        /* initialize running count of expected bytes in reply.
 935         * NOTE: the replied tag SHOULD be the same is the one sent,
 936         * but this is not required as a MUST for the server to do so. */
 937        hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
 938
 939        BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
 940        encode_string(xdr, hdr->taglen, hdr->tag);
 941        p = reserve_space(xdr, 8);
 942        *p++ = cpu_to_be32(hdr->minorversion);
 943        hdr->nops_p = p;
 944        *p = cpu_to_be32(hdr->nops);
 945}
 946
 947static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
 948                uint32_t replen,
 949                struct compound_hdr *hdr)
 950{
 951        encode_uint32(xdr, op);
 952        hdr->nops++;
 953        hdr->replen += replen;
 954}
 955
 956static void encode_nops(struct compound_hdr *hdr)
 957{
 958        BUG_ON(hdr->nops > NFS4_MAX_OPS);
 959        *hdr->nops_p = htonl(hdr->nops);
 960}
 961
 962static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
 963{
 964        encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
 965}
 966
 967static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 968{
 969        encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
 970}
 971
 972static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
 973{
 974        char owner_name[IDMAP_NAMESZ];
 975        char owner_group[IDMAP_NAMESZ];
 976        int owner_namelen = 0;
 977        int owner_grouplen = 0;
 978        __be32 *p;
 979        __be32 *q;
 980        int len;
 981        uint32_t bmval0 = 0;
 982        uint32_t bmval1 = 0;
 983
 984        /*
 985         * We reserve enough space to write the entire attribute buffer at once.
 986         * In the worst-case, this would be
 987         *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
 988         *          = 36 bytes, plus any contribution from variable-length fields
 989         *            such as owner/group.
 990         */
 991        len = 16;
 992
 993        /* Sigh */
 994        if (iap->ia_valid & ATTR_SIZE)
 995                len += 8;
 996        if (iap->ia_valid & ATTR_MODE)
 997                len += 4;
 998        if (iap->ia_valid & ATTR_UID) {
 999                owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1000                if (owner_namelen < 0) {
1001                        dprintk("nfs: couldn't resolve uid %d to string\n",
1002                                        iap->ia_uid);
1003                        /* XXX */
1004                        strcpy(owner_name, "nobody");
1005                        owner_namelen = sizeof("nobody") - 1;
1006                        /* goto out; */
1007                }
1008                len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1009        }
1010        if (iap->ia_valid & ATTR_GID) {
1011                owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1012                if (owner_grouplen < 0) {
1013                        dprintk("nfs: couldn't resolve gid %d to string\n",
1014                                        iap->ia_gid);
1015                        strcpy(owner_group, "nobody");
1016                        owner_grouplen = sizeof("nobody") - 1;
1017                        /* goto out; */
1018                }
1019                len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1020        }
1021        if (iap->ia_valid & ATTR_ATIME_SET)
1022                len += 16;
1023        else if (iap->ia_valid & ATTR_ATIME)
1024                len += 4;
1025        if (iap->ia_valid & ATTR_MTIME_SET)
1026                len += 16;
1027        else if (iap->ia_valid & ATTR_MTIME)
1028                len += 4;
1029        p = reserve_space(xdr, len);
1030
1031        /*
1032         * We write the bitmap length now, but leave the bitmap and the attribute
1033         * buffer length to be backfilled at the end of this routine.
1034         */
1035        *p++ = cpu_to_be32(2);
1036        q = p;
1037        p += 3;
1038
1039        if (iap->ia_valid & ATTR_SIZE) {
1040                bmval0 |= FATTR4_WORD0_SIZE;
1041                p = xdr_encode_hyper(p, iap->ia_size);
1042        }
1043        if (iap->ia_valid & ATTR_MODE) {
1044                bmval1 |= FATTR4_WORD1_MODE;
1045                *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1046        }
1047        if (iap->ia_valid & ATTR_UID) {
1048                bmval1 |= FATTR4_WORD1_OWNER;
1049                p = xdr_encode_opaque(p, owner_name, owner_namelen);
1050        }
1051        if (iap->ia_valid & ATTR_GID) {
1052                bmval1 |= FATTR4_WORD1_OWNER_GROUP;
1053                p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1054        }
1055        if (iap->ia_valid & ATTR_ATIME_SET) {
1056                bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
1057                *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1058                *p++ = cpu_to_be32(0);
1059                *p++ = cpu_to_be32(iap->ia_atime.tv_sec);
1060                *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
1061        }
1062        else if (iap->ia_valid & ATTR_ATIME) {
1063                bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
1064                *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1065        }
1066        if (iap->ia_valid & ATTR_MTIME_SET) {
1067                bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
1068                *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1069                *p++ = cpu_to_be32(0);
1070                *p++ = cpu_to_be32(iap->ia_mtime.tv_sec);
1071                *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1072        }
1073        else if (iap->ia_valid & ATTR_MTIME) {
1074                bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
1075                *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1076        }
1077
1078        /*
1079         * Now we backfill the bitmap and the attribute buffer length.
1080         */
1081        if (len != ((char *)p - (char *)q) + 4) {
1082                printk(KERN_ERR "NFS: Attr length error, %u != %Zu\n",
1083                                len, ((char *)p - (char *)q) + 4);
1084                BUG();
1085        }
1086        len = (char *)p - (char *)q - 12;
1087        *q++ = htonl(bmval0);
1088        *q++ = htonl(bmval1);
1089        *q = htonl(len);
1090
1091/* out: */
1092}
1093
1094static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1095{
1096        encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1097        encode_uint32(xdr, access);
1098}
1099
1100static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1101{
1102        encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1103        encode_nfs4_seqid(xdr, arg->seqid);
1104        encode_nfs4_stateid(xdr, arg->stateid);
1105}
1106
1107static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1108{
1109        __be32 *p;
1110
1111        encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1112        p = reserve_space(xdr, 12);
1113        p = xdr_encode_hyper(p, args->offset);
1114        *p = cpu_to_be32(args->count);
1115}
1116
1117static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1118{
1119        __be32 *p;
1120
1121        encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1122        encode_uint32(xdr, create->ftype);
1123
1124        switch (create->ftype) {
1125        case NF4LNK:
1126                p = reserve_space(xdr, 4);
1127                *p = cpu_to_be32(create->u.symlink.len);
1128                xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
1129                break;
1130
1131        case NF4BLK: case NF4CHR:
1132                p = reserve_space(xdr, 8);
1133                *p++ = cpu_to_be32(create->u.device.specdata1);
1134                *p = cpu_to_be32(create->u.device.specdata2);
1135                break;
1136
1137        default:
1138                break;
1139        }
1140
1141        encode_string(xdr, create->name->len, create->name->name);
1142        encode_attrs(xdr, create->attrs, create->server);
1143}
1144
1145static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1146{
1147        __be32 *p;
1148
1149        encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1150        p = reserve_space(xdr, 8);
1151        *p++ = cpu_to_be32(1);
1152        *p = cpu_to_be32(bitmap);
1153}
1154
1155static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1156{
1157        __be32 *p;
1158
1159        encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1160        p = reserve_space(xdr, 12);
1161        *p++ = cpu_to_be32(2);
1162        *p++ = cpu_to_be32(bm0);
1163        *p = cpu_to_be32(bm1);
1164}
1165
1166static void
1167encode_getattr_three(struct xdr_stream *xdr,
1168                     uint32_t bm0, uint32_t bm1, uint32_t bm2,
1169                     struct compound_hdr *hdr)
1170{
1171        __be32 *p;
1172
1173        encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1174        if (bm2) {
1175                p = reserve_space(xdr, 16);
1176                *p++ = cpu_to_be32(3);
1177                *p++ = cpu_to_be32(bm0);
1178                *p++ = cpu_to_be32(bm1);
1179                *p = cpu_to_be32(bm2);
1180        } else if (bm1) {
1181                p = reserve_space(xdr, 12);
1182                *p++ = cpu_to_be32(2);
1183                *p++ = cpu_to_be32(bm0);
1184                *p = cpu_to_be32(bm1);
1185        } else {
1186                p = reserve_space(xdr, 8);
1187                *p++ = cpu_to_be32(1);
1188                *p = cpu_to_be32(bm0);
1189        }
1190}
1191
1192static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1193{
1194        encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1195                           bitmask[1] & nfs4_fattr_bitmap[1], hdr);
1196}
1197
1198static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1199                                 const u32 *open_bitmap,
1200                                 struct compound_hdr *hdr)
1201{
1202        encode_getattr_three(xdr,
1203                             bitmask[0] & open_bitmap[0],
1204                             bitmask[1] & open_bitmap[1],
1205                             bitmask[2] & open_bitmap[2],
1206                             hdr);
1207}
1208
1209static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1210{
1211        encode_getattr_three(xdr,
1212                             bitmask[0] & nfs4_fsinfo_bitmap[0],
1213                             bitmask[1] & nfs4_fsinfo_bitmap[1],
1214                             bitmask[2] & nfs4_fsinfo_bitmap[2],
1215                             hdr);
1216}
1217
1218static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1219{
1220        encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1221                           bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1222}
1223
1224static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1225{
1226        encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1227}
1228
1229static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1230{
1231        encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1232        encode_string(xdr, name->len, name->name);
1233}
1234
1235static inline int nfs4_lock_type(struct file_lock *fl, int block)
1236{
1237        if (fl->fl_type == F_RDLCK)
1238                return block ? NFS4_READW_LT : NFS4_READ_LT;
1239        return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1240}
1241
1242static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1243{
1244        if (fl->fl_end == OFFSET_MAX)
1245                return ~(uint64_t)0;
1246        return fl->fl_end - fl->fl_start + 1;
1247}
1248
1249static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1250{
1251        __be32 *p;
1252
1253        p = reserve_space(xdr, 32);
1254        p = xdr_encode_hyper(p, lowner->clientid);
1255        *p++ = cpu_to_be32(20);
1256        p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1257        *p++ = cpu_to_be32(lowner->s_dev);
1258        xdr_encode_hyper(p, lowner->id);
1259}
1260
1261/*
1262 * opcode,type,reclaim,offset,length,new_lock_owner = 32
1263 * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1264 */
1265static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1266{
1267        __be32 *p;
1268
1269        encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1270        p = reserve_space(xdr, 28);
1271        *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1272        *p++ = cpu_to_be32(args->reclaim);
1273        p = xdr_encode_hyper(p, args->fl->fl_start);
1274        p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1275        *p = cpu_to_be32(args->new_lock_owner);
1276        if (args->new_lock_owner){
1277                encode_nfs4_seqid(xdr, args->open_seqid);
1278                encode_nfs4_stateid(xdr, args->open_stateid);
1279                encode_nfs4_seqid(xdr, args->lock_seqid);
1280                encode_lockowner(xdr, &args->lock_owner);
1281        }
1282        else {
1283                encode_nfs4_stateid(xdr, args->lock_stateid);
1284                encode_nfs4_seqid(xdr, args->lock_seqid);
1285        }
1286}
1287
1288static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1289{
1290        __be32 *p;
1291
1292        encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1293        p = reserve_space(xdr, 20);
1294        *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1295        p = xdr_encode_hyper(p, args->fl->fl_start);
1296        p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1297        encode_lockowner(xdr, &args->lock_owner);
1298}
1299
1300static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1301{
1302        __be32 *p;
1303
1304        encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1305        encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1306        encode_nfs4_seqid(xdr, args->seqid);
1307        encode_nfs4_stateid(xdr, args->stateid);
1308        p = reserve_space(xdr, 16);
1309        p = xdr_encode_hyper(p, args->fl->fl_start);
1310        xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1311}
1312
1313static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1314{
1315        encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1316        encode_lockowner(xdr, lowner);
1317}
1318
1319static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1320{
1321        encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1322        encode_string(xdr, name->len, name->name);
1323}
1324
1325static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1326{
1327        __be32 *p;
1328
1329        p = reserve_space(xdr, 8);
1330        switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1331        case FMODE_READ:
1332                *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1333                break;
1334        case FMODE_WRITE:
1335                *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1336                break;
1337        case FMODE_READ|FMODE_WRITE:
1338                *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1339                break;
1340        default:
1341                *p++ = cpu_to_be32(0);
1342        }
1343        *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1344}
1345
1346static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1347{
1348        __be32 *p;
1349 /*
1350 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1351 * owner 4 = 32
1352 */
1353        encode_nfs4_seqid(xdr, arg->seqid);
1354        encode_share_access(xdr, arg->fmode);
1355        p = reserve_space(xdr, 36);
1356        p = xdr_encode_hyper(p, arg->clientid);
1357        *p++ = cpu_to_be32(24);
1358        p = xdr_encode_opaque_fixed(p, "open id:", 8);
1359        *p++ = cpu_to_be32(arg->server->s_dev);
1360        *p++ = cpu_to_be32(arg->id.uniquifier);
1361        xdr_encode_hyper(p, arg->id.create_time);
1362}
1363
1364static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1365{
1366        __be32 *p;
1367        struct nfs_client *clp;
1368
1369        p = reserve_space(xdr, 4);
1370        switch(arg->open_flags & O_EXCL) {
1371        case 0:
1372                *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1373                encode_attrs(xdr, arg->u.attrs, arg->server);
1374                break;
1375        default:
1376                clp = arg->server->nfs_client;
1377                if (clp->cl_mvops->minor_version > 0) {
1378                        if (nfs4_has_persistent_session(clp)) {
1379                                *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1380                                encode_attrs(xdr, arg->u.attrs, arg->server);
1381                        } else {
1382                                struct iattr dummy;
1383
1384                                *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1385                                encode_nfs4_verifier(xdr, &arg->u.verifier);
1386                                dummy.ia_valid = 0;
1387                                encode_attrs(xdr, &dummy, arg->server);
1388                        }
1389                } else {
1390                        *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1391                        encode_nfs4_verifier(xdr, &arg->u.verifier);
1392                }
1393        }
1394}
1395
1396static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1397{
1398        __be32 *p;
1399
1400        p = reserve_space(xdr, 4);
1401        switch (arg->open_flags & O_CREAT) {
1402        case 0:
1403                *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1404                break;
1405        default:
1406                BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1407                *p = cpu_to_be32(NFS4_OPEN_CREATE);
1408                encode_createmode(xdr, arg);
1409        }
1410}
1411
1412static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1413{
1414        __be32 *p;
1415
1416        p = reserve_space(xdr, 4);
1417        switch (delegation_type) {
1418        case 0:
1419                *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1420                break;
1421        case FMODE_READ:
1422                *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1423                break;
1424        case FMODE_WRITE|FMODE_READ:
1425                *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1426                break;
1427        default:
1428                BUG();
1429        }
1430}
1431
1432static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1433{
1434        __be32 *p;
1435
1436        p = reserve_space(xdr, 4);
1437        *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1438        encode_string(xdr, name->len, name->name);
1439}
1440
1441static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1442{
1443        __be32 *p;
1444
1445        p = reserve_space(xdr, 4);
1446        *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1447        encode_delegation_type(xdr, type);
1448}
1449
1450static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1451{
1452        __be32 *p;
1453
1454        p = reserve_space(xdr, 4);
1455        *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1456        encode_nfs4_stateid(xdr, stateid);
1457        encode_string(xdr, name->len, name->name);
1458}
1459
1460static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1461{
1462        encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1463        encode_openhdr(xdr, arg);
1464        encode_opentype(xdr, arg);
1465        switch (arg->claim) {
1466        case NFS4_OPEN_CLAIM_NULL:
1467                encode_claim_null(xdr, arg->name);
1468                break;
1469        case NFS4_OPEN_CLAIM_PREVIOUS:
1470                encode_claim_previous(xdr, arg->u.delegation_type);
1471                break;
1472        case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1473                encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1474                break;
1475        default:
1476                BUG();
1477        }
1478}
1479
1480static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1481{
1482        encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1483        encode_nfs4_stateid(xdr, arg->stateid);
1484        encode_nfs4_seqid(xdr, arg->seqid);
1485}
1486
1487static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1488{
1489        encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1490        encode_nfs4_stateid(xdr, arg->stateid);
1491        encode_nfs4_seqid(xdr, arg->seqid);
1492        encode_share_access(xdr, arg->fmode);
1493}
1494
1495static void
1496encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1497{
1498        encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1499        encode_string(xdr, fh->size, fh->data);
1500}
1501
1502static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1503{
1504        encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1505}
1506
1507static void encode_open_stateid(struct xdr_stream *xdr,
1508                const struct nfs_open_context *ctx,
1509                const struct nfs_lock_context *l_ctx,
1510                fmode_t fmode,
1511                int zero_seqid)
1512{
1513        nfs4_stateid stateid;
1514
1515        if (ctx->state != NULL) {
1516                const struct nfs_lockowner *lockowner = NULL;
1517
1518                if (l_ctx != NULL)
1519                        lockowner = &l_ctx->lockowner;
1520                nfs4_select_rw_stateid(&stateid, ctx->state,
1521                                fmode, lockowner);
1522                if (zero_seqid)
1523                        stateid.seqid = 0;
1524                encode_nfs4_stateid(xdr, &stateid);
1525        } else
1526                encode_nfs4_stateid(xdr, &zero_stateid);
1527}
1528
1529static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1530{
1531        __be32 *p;
1532
1533        encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1534        encode_open_stateid(xdr, args->context, args->lock_context,
1535                        FMODE_READ, hdr->minorversion);
1536
1537        p = reserve_space(xdr, 12);
1538        p = xdr_encode_hyper(p, args->offset);
1539        *p = cpu_to_be32(args->count);
1540}
1541
1542static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1543{
1544        uint32_t attrs[2] = {
1545                FATTR4_WORD0_RDATTR_ERROR,
1546                FATTR4_WORD1_MOUNTED_ON_FILEID,
1547        };
1548        uint32_t dircount = readdir->count >> 1;
1549        __be32 *p, verf[2];
1550
1551        if (readdir->plus) {
1552                attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1553                        FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1554                attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1555                        FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1556                        FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1557                        FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1558                dircount >>= 1;
1559        }
1560        /* Use mounted_on_fileid only if the server supports it */
1561        if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1562                attrs[0] |= FATTR4_WORD0_FILEID;
1563
1564        encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1565        encode_uint64(xdr, readdir->cookie);
1566        encode_nfs4_verifier(xdr, &readdir->verifier);
1567        p = reserve_space(xdr, 20);
1568        *p++ = cpu_to_be32(dircount);
1569        *p++ = cpu_to_be32(readdir->count);
1570        *p++ = cpu_to_be32(2);
1571
1572        *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1573        *p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1574        memcpy(verf, readdir->verifier.data, sizeof(verf));
1575        dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1576                        __func__,
1577                        (unsigned long long)readdir->cookie,
1578                        verf[0], verf[1],
1579                        attrs[0] & readdir->bitmask[0],
1580                        attrs[1] & readdir->bitmask[1]);
1581}
1582
1583static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1584{
1585        encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1586}
1587
1588static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1589{
1590        encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1591        encode_string(xdr, name->len, name->name);
1592}
1593
1594static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1595{
1596        encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1597        encode_string(xdr, oldname->len, oldname->name);
1598        encode_string(xdr, newname->len, newname->name);
1599}
1600
1601static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1602                         struct compound_hdr *hdr)
1603{
1604        encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1605        encode_uint64(xdr, clid);
1606}
1607
1608static void
1609encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1610{
1611        encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1612}
1613
1614static void
1615encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1616{
1617        __be32 *p;
1618
1619        encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1620        encode_nfs4_stateid(xdr, &zero_stateid);
1621        p = reserve_space(xdr, 2*4);
1622        *p++ = cpu_to_be32(1);
1623        *p = cpu_to_be32(FATTR4_WORD0_ACL);
1624        BUG_ON(arg->acl_len % 4);
1625        p = reserve_space(xdr, 4);
1626        *p = cpu_to_be32(arg->acl_len);
1627        xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1628}
1629
1630static void
1631encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1632{
1633        encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1634}
1635
1636static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1637{
1638        encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1639        encode_nfs4_stateid(xdr, &arg->stateid);
1640        encode_attrs(xdr, arg->iap, server);
1641}
1642
1643static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1644{
1645        __be32 *p;
1646
1647        encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1648        encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1649
1650        encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1651        p = reserve_space(xdr, 4);
1652        *p = cpu_to_be32(setclientid->sc_prog);
1653        encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1654        encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1655        p = reserve_space(xdr, 4);
1656        *p = cpu_to_be32(setclientid->sc_cb_ident);
1657}
1658
1659static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1660{
1661        encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1662                        decode_setclientid_confirm_maxsz, hdr);
1663        encode_uint64(xdr, arg->clientid);
1664        encode_nfs4_verifier(xdr, &arg->confirm);
1665}
1666
1667static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1668{
1669        __be32 *p;
1670
1671        encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1672        encode_open_stateid(xdr, args->context, args->lock_context,
1673                        FMODE_WRITE, hdr->minorversion);
1674
1675        p = reserve_space(xdr, 16);
1676        p = xdr_encode_hyper(p, args->offset);
1677        *p++ = cpu_to_be32(args->stable);
1678        *p = cpu_to_be32(args->count);
1679
1680        xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1681}
1682
1683static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1684{
1685        encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1686        encode_nfs4_stateid(xdr, stateid);
1687}
1688
1689static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1690{
1691        encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1692        encode_string(xdr, name->len, name->name);
1693}
1694
1695#if defined(CONFIG_NFS_V4_1)
1696/* NFSv4.1 operations */
1697static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1698                                   struct nfs4_session *session,
1699                                   struct compound_hdr *hdr)
1700{
1701        __be32 *p;
1702
1703        encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1704                decode_bind_conn_to_session_maxsz, hdr);
1705        encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1706        p = xdr_reserve_space(xdr, 8);
1707        *p++ = cpu_to_be32(NFS4_CDFC4_BACK_OR_BOTH);
1708        *p = 0; /* use_conn_in_rdma_mode = False */
1709}
1710
1711static void encode_exchange_id(struct xdr_stream *xdr,
1712                               struct nfs41_exchange_id_args *args,
1713                               struct compound_hdr *hdr)
1714{
1715        __be32 *p;
1716        char impl_name[NFS4_OPAQUE_LIMIT];
1717        int len = 0;
1718
1719        encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1720        encode_nfs4_verifier(xdr, args->verifier);
1721
1722        encode_string(xdr, args->id_len, args->id);
1723
1724        p = reserve_space(xdr, 12);
1725        *p++ = cpu_to_be32(args->flags);
1726        *p++ = cpu_to_be32(0);  /* zero length state_protect4_a */
1727
1728        if (send_implementation_id &&
1729            sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1730            sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1731                <= NFS4_OPAQUE_LIMIT + 1)
1732                len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1733                               utsname()->sysname, utsname()->release,
1734                               utsname()->version, utsname()->machine);
1735
1736        if (len > 0) {
1737                *p = cpu_to_be32(1);    /* implementation id array length=1 */
1738
1739                encode_string(xdr,
1740                        sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1741                        CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1742                encode_string(xdr, len, impl_name);
1743                /* just send zeros for nii_date - the date is in nii_name */
1744                p = reserve_space(xdr, 12);
1745                p = xdr_encode_hyper(p, 0);
1746                *p = cpu_to_be32(0);
1747        } else
1748                *p = cpu_to_be32(0);    /* implementation id array length=0 */
1749}
1750
1751static void encode_create_session(struct xdr_stream *xdr,
1752                                  struct nfs41_create_session_args *args,
1753                                  struct compound_hdr *hdr)
1754{
1755        __be32 *p;
1756        char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1757        uint32_t len;
1758        struct nfs_client *clp = args->client;
1759        struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1760        u32 max_resp_sz_cached;
1761
1762        /*
1763         * Assumes OPEN is the biggest non-idempotent compound.
1764         * 2 is the verifier.
1765         */
1766        max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1767                              RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1768
1769        len = scnprintf(machine_name, sizeof(machine_name), "%s",
1770                        clp->cl_ipaddr);
1771
1772        encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1773        p = reserve_space(xdr, 16 + 2*28 + 20 + len + 12);
1774        p = xdr_encode_hyper(p, clp->cl_clientid);
1775        *p++ = cpu_to_be32(clp->cl_seqid);                      /*Sequence id */
1776        *p++ = cpu_to_be32(args->flags);                        /*flags */
1777
1778        /* Fore Channel */
1779        *p++ = cpu_to_be32(0);                          /* header padding size */
1780        *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1781        *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1782        *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1783        *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1784        *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1785        *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1786
1787        /* Back Channel */
1788        *p++ = cpu_to_be32(0);                          /* header padding size */
1789        *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1790        *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1791        *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1792        *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1793        *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1794        *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1795
1796        *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1797        *p++ = cpu_to_be32(1);
1798        *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1799
1800        /* authsys_parms rfc1831 */
1801        *p++ = (__be32)nn->boot_time.tv_nsec;           /* stamp */
1802        p = xdr_encode_opaque(p, machine_name, len);
1803        *p++ = cpu_to_be32(0);                          /* UID */
1804        *p++ = cpu_to_be32(0);                          /* GID */
1805        *p = cpu_to_be32(0);                            /* No more gids */
1806}
1807
1808static void encode_destroy_session(struct xdr_stream *xdr,
1809                                   struct nfs4_session *session,
1810                                   struct compound_hdr *hdr)
1811{
1812        encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1813        encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1814}
1815
1816static void encode_destroy_clientid(struct xdr_stream *xdr,
1817                                   uint64_t clientid,
1818                                   struct compound_hdr *hdr)
1819{
1820        encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1821        encode_uint64(xdr, clientid);
1822}
1823
1824static void encode_reclaim_complete(struct xdr_stream *xdr,
1825                                    struct nfs41_reclaim_complete_args *args,
1826                                    struct compound_hdr *hdr)
1827{
1828        encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1829        encode_uint32(xdr, args->one_fs);
1830}
1831#endif /* CONFIG_NFS_V4_1 */
1832
1833static void encode_sequence(struct xdr_stream *xdr,
1834                            const struct nfs4_sequence_args *args,
1835                            struct compound_hdr *hdr)
1836{
1837#if defined(CONFIG_NFS_V4_1)
1838        struct nfs4_session *session = args->sa_session;
1839        struct nfs4_slot_table *tp;
1840        struct nfs4_slot *slot;
1841        __be32 *p;
1842
1843        if (!session)
1844                return;
1845
1846        tp = &session->fc_slot_table;
1847
1848        WARN_ON(args->sa_slotid == NFS4_MAX_SLOT_TABLE);
1849        slot = tp->slots + args->sa_slotid;
1850
1851        encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1852
1853        /*
1854         * Sessionid + seqid + slotid + max slotid + cache_this
1855         */
1856        dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1857                "max_slotid=%d cache_this=%d\n",
1858                __func__,
1859                ((u32 *)session->sess_id.data)[0],
1860                ((u32 *)session->sess_id.data)[1],
1861                ((u32 *)session->sess_id.data)[2],
1862                ((u32 *)session->sess_id.data)[3],
1863                slot->seq_nr, args->sa_slotid,
1864                tp->highest_used_slotid, args->sa_cache_this);
1865        p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1866        p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1867        *p++ = cpu_to_be32(slot->seq_nr);
1868        *p++ = cpu_to_be32(args->sa_slotid);
1869        *p++ = cpu_to_be32(tp->highest_used_slotid);
1870        *p = cpu_to_be32(args->sa_cache_this);
1871#endif /* CONFIG_NFS_V4_1 */
1872}
1873
1874#ifdef CONFIG_NFS_V4_1
1875static void
1876encode_getdevicelist(struct xdr_stream *xdr,
1877                     const struct nfs4_getdevicelist_args *args,
1878                     struct compound_hdr *hdr)
1879{
1880        __be32 *p;
1881        nfs4_verifier dummy = {
1882                .data = "dummmmmy",
1883        };
1884
1885        encode_op_hdr(xdr, OP_GETDEVICELIST, decode_getdevicelist_maxsz, hdr);
1886        p = reserve_space(xdr, 16);
1887        *p++ = cpu_to_be32(args->layoutclass);
1888        *p++ = cpu_to_be32(NFS4_PNFS_GETDEVLIST_MAXNUM);
1889        xdr_encode_hyper(p, 0ULL);                          /* cookie */
1890        encode_nfs4_verifier(xdr, &dummy);
1891}
1892
1893static void
1894encode_getdeviceinfo(struct xdr_stream *xdr,
1895                     const struct nfs4_getdeviceinfo_args *args,
1896                     struct compound_hdr *hdr)
1897{
1898        __be32 *p;
1899
1900        encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1901        p = reserve_space(xdr, 12 + NFS4_DEVICEID4_SIZE);
1902        p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1903                                    NFS4_DEVICEID4_SIZE);
1904        *p++ = cpu_to_be32(args->pdev->layout_type);
1905        *p++ = cpu_to_be32(args->pdev->pglen);          /* gdia_maxcount */
1906        *p++ = cpu_to_be32(0);                          /* bitmap length 0 */
1907}
1908
1909static void
1910encode_layoutget(struct xdr_stream *xdr,
1911                      const struct nfs4_layoutget_args *args,
1912                      struct compound_hdr *hdr)
1913{
1914        __be32 *p;
1915
1916        encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1917        p = reserve_space(xdr, 36);
1918        *p++ = cpu_to_be32(0);     /* Signal layout available */
1919        *p++ = cpu_to_be32(args->type);
1920        *p++ = cpu_to_be32(args->range.iomode);
1921        p = xdr_encode_hyper(p, args->range.offset);
1922        p = xdr_encode_hyper(p, args->range.length);
1923        p = xdr_encode_hyper(p, args->minlength);
1924        encode_nfs4_stateid(xdr, &args->stateid);
1925        encode_uint32(xdr, args->maxcount);
1926
1927        dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1928                __func__,
1929                args->type,
1930                args->range.iomode,
1931                (unsigned long)args->range.offset,
1932                (unsigned long)args->range.length,
1933                args->maxcount);
1934}
1935
1936static int
1937encode_layoutcommit(struct xdr_stream *xdr,
1938                    struct inode *inode,
1939                    const struct nfs4_layoutcommit_args *args,
1940                    struct compound_hdr *hdr)
1941{
1942        __be32 *p;
1943
1944        dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1945                NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1946
1947        encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
1948        p = reserve_space(xdr, 20);
1949        /* Only whole file layouts */
1950        p = xdr_encode_hyper(p, 0); /* offset */
1951        p = xdr_encode_hyper(p, args->lastbytewritten + 1);     /* length */
1952        *p = cpu_to_be32(0); /* reclaim */
1953        encode_nfs4_stateid(xdr, &args->stateid);
1954        p = reserve_space(xdr, 20);
1955        *p++ = cpu_to_be32(1); /* newoffset = TRUE */
1956        p = xdr_encode_hyper(p, args->lastbytewritten);
1957        *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
1958        *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
1959
1960        if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit)
1961                NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
1962                        NFS_I(inode)->layout, xdr, args);
1963        else
1964                encode_uint32(xdr, 0); /* no layout-type payload */
1965
1966        return 0;
1967}
1968
1969static void
1970encode_layoutreturn(struct xdr_stream *xdr,
1971                    const struct nfs4_layoutreturn_args *args,
1972                    struct compound_hdr *hdr)
1973{
1974        __be32 *p;
1975
1976        encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
1977        p = reserve_space(xdr, 16);
1978        *p++ = cpu_to_be32(0);          /* reclaim. always 0 for now */
1979        *p++ = cpu_to_be32(args->layout_type);
1980        *p++ = cpu_to_be32(IOMODE_ANY);
1981        *p = cpu_to_be32(RETURN_FILE);
1982        p = reserve_space(xdr, 16);
1983        p = xdr_encode_hyper(p, 0);
1984        p = xdr_encode_hyper(p, NFS4_MAX_UINT64);
1985        spin_lock(&args->inode->i_lock);
1986        encode_nfs4_stateid(xdr, &args->stateid);
1987        spin_unlock(&args->inode->i_lock);
1988        if (NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn) {
1989                NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn(
1990                        NFS_I(args->inode)->layout, xdr, args);
1991        } else
1992                encode_uint32(xdr, 0);
1993}
1994
1995static int
1996encode_secinfo_no_name(struct xdr_stream *xdr,
1997                       const struct nfs41_secinfo_no_name_args *args,
1998                       struct compound_hdr *hdr)
1999{
2000        encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2001        encode_uint32(xdr, args->style);
2002        return 0;
2003}
2004
2005static void encode_test_stateid(struct xdr_stream *xdr,
2006                                struct nfs41_test_stateid_args *args,
2007                                struct compound_hdr *hdr)
2008{
2009        encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2010        encode_uint32(xdr, 1);
2011        encode_nfs4_stateid(xdr, args->stateid);
2012}
2013
2014static void encode_free_stateid(struct xdr_stream *xdr,
2015                                struct nfs41_free_stateid_args *args,
2016                                struct compound_hdr *hdr)
2017{
2018        encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2019        encode_nfs4_stateid(xdr, args->stateid);
2020}
2021#endif /* CONFIG_NFS_V4_1 */
2022
2023/*
2024 * END OF "GENERIC" ENCODE ROUTINES.
2025 */
2026
2027static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2028{
2029#if defined(CONFIG_NFS_V4_1)
2030        if (args->sa_session)
2031                return args->sa_session->clp->cl_mvops->minor_version;
2032#endif /* CONFIG_NFS_V4_1 */
2033        return 0;
2034}
2035
2036/*
2037 * Encode an ACCESS request
2038 */
2039static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2040                                const struct nfs4_accessargs *args)
2041{
2042        struct compound_hdr hdr = {
2043                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2044        };
2045
2046        encode_compound_hdr(xdr, req, &hdr);
2047        encode_sequence(xdr, &args->seq_args, &hdr);
2048        encode_putfh(xdr, args->fh, &hdr);
2049        encode_access(xdr, args->access, &hdr);
2050        encode_getfattr(xdr, args->bitmask, &hdr);
2051        encode_nops(&hdr);
2052}
2053
2054/*
2055 * Encode LOOKUP request
2056 */
2057static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2058                                const struct nfs4_lookup_arg *args)
2059{
2060        struct compound_hdr hdr = {
2061                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2062        };
2063
2064        encode_compound_hdr(xdr, req, &hdr);
2065        encode_sequence(xdr, &args->seq_args, &hdr);
2066        encode_putfh(xdr, args->dir_fh, &hdr);
2067        encode_lookup(xdr, args->name, &hdr);
2068        encode_getfh(xdr, &hdr);
2069        encode_getfattr(xdr, args->bitmask, &hdr);
2070        encode_nops(&hdr);
2071}
2072
2073/*
2074 * Encode LOOKUP_ROOT request
2075 */
2076static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2077                                     struct xdr_stream *xdr,
2078                                     const struct nfs4_lookup_root_arg *args)
2079{
2080        struct compound_hdr hdr = {
2081                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2082        };
2083
2084        encode_compound_hdr(xdr, req, &hdr);
2085        encode_sequence(xdr, &args->seq_args, &hdr);
2086        encode_putrootfh(xdr, &hdr);
2087        encode_getfh(xdr, &hdr);
2088        encode_getfattr(xdr, args->bitmask, &hdr);
2089        encode_nops(&hdr);
2090}
2091
2092/*
2093 * Encode REMOVE request
2094 */
2095static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2096                                const struct nfs_removeargs *args)
2097{
2098        struct compound_hdr hdr = {
2099                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2100        };
2101
2102        encode_compound_hdr(xdr, req, &hdr);
2103        encode_sequence(xdr, &args->seq_args, &hdr);
2104        encode_putfh(xdr, args->fh, &hdr);
2105        encode_remove(xdr, &args->name, &hdr);
2106        encode_nops(&hdr);
2107}
2108
2109/*
2110 * Encode RENAME request
2111 */
2112static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2113                                const struct nfs_renameargs *args)
2114{
2115        struct compound_hdr hdr = {
2116                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2117        };
2118
2119        encode_compound_hdr(xdr, req, &hdr);
2120        encode_sequence(xdr, &args->seq_args, &hdr);
2121        encode_putfh(xdr, args->old_dir, &hdr);
2122        encode_savefh(xdr, &hdr);
2123        encode_putfh(xdr, args->new_dir, &hdr);
2124        encode_rename(xdr, args->old_name, args->new_name, &hdr);
2125        encode_nops(&hdr);
2126}
2127
2128/*
2129 * Encode LINK request
2130 */
2131static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2132                             const struct nfs4_link_arg *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_savefh(xdr, &hdr);
2142        encode_putfh(xdr, args->dir_fh, &hdr);
2143        encode_link(xdr, args->name, &hdr);
2144        encode_restorefh(xdr, &hdr);
2145        encode_getfattr(xdr, args->bitmask, &hdr);
2146        encode_nops(&hdr);
2147}
2148
2149/*
2150 * Encode CREATE request
2151 */
2152static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2153                                const struct nfs4_create_arg *args)
2154{
2155        struct compound_hdr hdr = {
2156                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2157        };
2158
2159        encode_compound_hdr(xdr, req, &hdr);
2160        encode_sequence(xdr, &args->seq_args, &hdr);
2161        encode_putfh(xdr, args->dir_fh, &hdr);
2162        encode_create(xdr, args, &hdr);
2163        encode_getfh(xdr, &hdr);
2164        encode_getfattr(xdr, args->bitmask, &hdr);
2165        encode_nops(&hdr);
2166}
2167
2168/*
2169 * Encode SYMLINK request
2170 */
2171static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2172                                 const struct nfs4_create_arg *args)
2173{
2174        nfs4_xdr_enc_create(req, xdr, args);
2175}
2176
2177/*
2178 * Encode GETATTR request
2179 */
2180static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2181                                 const struct nfs4_getattr_arg *args)
2182{
2183        struct compound_hdr hdr = {
2184                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2185        };
2186
2187        encode_compound_hdr(xdr, req, &hdr);
2188        encode_sequence(xdr, &args->seq_args, &hdr);
2189        encode_putfh(xdr, args->fh, &hdr);
2190        encode_getfattr(xdr, args->bitmask, &hdr);
2191        encode_nops(&hdr);
2192}
2193
2194/*
2195 * Encode a CLOSE request
2196 */
2197static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2198                               struct nfs_closeargs *args)
2199{
2200        struct compound_hdr hdr = {
2201                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2202        };
2203
2204        encode_compound_hdr(xdr, req, &hdr);
2205        encode_sequence(xdr, &args->seq_args, &hdr);
2206        encode_putfh(xdr, args->fh, &hdr);
2207        encode_close(xdr, args, &hdr);
2208        encode_getfattr(xdr, args->bitmask, &hdr);
2209        encode_nops(&hdr);
2210}
2211
2212/*
2213 * Encode an OPEN request
2214 */
2215static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2216                              struct nfs_openargs *args)
2217{
2218        struct compound_hdr hdr = {
2219                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2220        };
2221
2222        encode_compound_hdr(xdr, req, &hdr);
2223        encode_sequence(xdr, &args->seq_args, &hdr);
2224        encode_putfh(xdr, args->fh, &hdr);
2225        encode_open(xdr, args, &hdr);
2226        encode_getfh(xdr, &hdr);
2227        if (args->access)
2228                encode_access(xdr, args->access, &hdr);
2229        encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2230        encode_nops(&hdr);
2231}
2232
2233/*
2234 * Encode an OPEN_CONFIRM request
2235 */
2236static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2237                                      struct xdr_stream *xdr,
2238                                      struct nfs_open_confirmargs *args)
2239{
2240        struct compound_hdr hdr = {
2241                .nops   = 0,
2242        };
2243
2244        encode_compound_hdr(xdr, req, &hdr);
2245        encode_putfh(xdr, args->fh, &hdr);
2246        encode_open_confirm(xdr, args, &hdr);
2247        encode_nops(&hdr);
2248}
2249
2250/*
2251 * Encode an OPEN request with no attributes.
2252 */
2253static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2254                                     struct xdr_stream *xdr,
2255                                     struct nfs_openargs *args)
2256{
2257        struct compound_hdr hdr = {
2258                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2259        };
2260
2261        encode_compound_hdr(xdr, req, &hdr);
2262        encode_sequence(xdr, &args->seq_args, &hdr);
2263        encode_putfh(xdr, args->fh, &hdr);
2264        encode_open(xdr, args, &hdr);
2265        if (args->access)
2266                encode_access(xdr, args->access, &hdr);
2267        encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2268        encode_nops(&hdr);
2269}
2270
2271/*
2272 * Encode an OPEN_DOWNGRADE request
2273 */
2274static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2275                                        struct xdr_stream *xdr,
2276                                        struct nfs_closeargs *args)
2277{
2278        struct compound_hdr hdr = {
2279                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2280        };
2281
2282        encode_compound_hdr(xdr, req, &hdr);
2283        encode_sequence(xdr, &args->seq_args, &hdr);
2284        encode_putfh(xdr, args->fh, &hdr);
2285        encode_open_downgrade(xdr, args, &hdr);
2286        encode_getfattr(xdr, args->bitmask, &hdr);
2287        encode_nops(&hdr);
2288}
2289
2290/*
2291 * Encode a LOCK request
2292 */
2293static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2294                              struct nfs_lock_args *args)
2295{
2296        struct compound_hdr hdr = {
2297                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2298        };
2299
2300        encode_compound_hdr(xdr, req, &hdr);
2301        encode_sequence(xdr, &args->seq_args, &hdr);
2302        encode_putfh(xdr, args->fh, &hdr);
2303        encode_lock(xdr, args, &hdr);
2304        encode_nops(&hdr);
2305}
2306
2307/*
2308 * Encode a LOCKT request
2309 */
2310static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2311                               struct nfs_lockt_args *args)
2312{
2313        struct compound_hdr hdr = {
2314                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2315        };
2316
2317        encode_compound_hdr(xdr, req, &hdr);
2318        encode_sequence(xdr, &args->seq_args, &hdr);
2319        encode_putfh(xdr, args->fh, &hdr);
2320        encode_lockt(xdr, args, &hdr);
2321        encode_nops(&hdr);
2322}
2323
2324/*
2325 * Encode a LOCKU request
2326 */
2327static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2328                               struct nfs_locku_args *args)
2329{
2330        struct compound_hdr hdr = {
2331                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2332        };
2333
2334        encode_compound_hdr(xdr, req, &hdr);
2335        encode_sequence(xdr, &args->seq_args, &hdr);
2336        encode_putfh(xdr, args->fh, &hdr);
2337        encode_locku(xdr, args, &hdr);
2338        encode_nops(&hdr);
2339}
2340
2341static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2342                                           struct xdr_stream *xdr,
2343                                        struct nfs_release_lockowner_args *args)
2344{
2345        struct compound_hdr hdr = {
2346                .minorversion = 0,
2347        };
2348
2349        encode_compound_hdr(xdr, req, &hdr);
2350        encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2351        encode_nops(&hdr);
2352}
2353
2354/*
2355 * Encode a READLINK request
2356 */
2357static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2358                                  const struct nfs4_readlink *args)
2359{
2360        struct compound_hdr hdr = {
2361                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2362        };
2363
2364        encode_compound_hdr(xdr, req, &hdr);
2365        encode_sequence(xdr, &args->seq_args, &hdr);
2366        encode_putfh(xdr, args->fh, &hdr);
2367        encode_readlink(xdr, args, req, &hdr);
2368
2369        xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2370                        args->pgbase, args->pglen);
2371        encode_nops(&hdr);
2372}
2373
2374/*
2375 * Encode a READDIR request
2376 */
2377static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2378                                 const struct nfs4_readdir_arg *args)
2379{
2380        struct compound_hdr hdr = {
2381                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2382        };
2383
2384        encode_compound_hdr(xdr, req, &hdr);
2385        encode_sequence(xdr, &args->seq_args, &hdr);
2386        encode_putfh(xdr, args->fh, &hdr);
2387        encode_readdir(xdr, args, req, &hdr);
2388
2389        xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2390                         args->pgbase, args->count);
2391        dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2392                        __func__, hdr.replen << 2, args->pages,
2393                        args->pgbase, args->count);
2394        encode_nops(&hdr);
2395}
2396
2397/*
2398 * Encode a READ request
2399 */
2400static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2401                              struct nfs_readargs *args)
2402{
2403        struct compound_hdr hdr = {
2404                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2405        };
2406
2407        encode_compound_hdr(xdr, req, &hdr);
2408        encode_sequence(xdr, &args->seq_args, &hdr);
2409        encode_putfh(xdr, args->fh, &hdr);
2410        encode_read(xdr, args, &hdr);
2411
2412        xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2413                         args->pages, args->pgbase, args->count);
2414        req->rq_rcv_buf.flags |= XDRBUF_READ;
2415        encode_nops(&hdr);
2416}
2417
2418/*
2419 * Encode an SETATTR request
2420 */
2421static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2422                                 struct nfs_setattrargs *args)
2423{
2424        struct compound_hdr hdr = {
2425                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2426        };
2427
2428        encode_compound_hdr(xdr, req, &hdr);
2429        encode_sequence(xdr, &args->seq_args, &hdr);
2430        encode_putfh(xdr, args->fh, &hdr);
2431        encode_setattr(xdr, args, args->server, &hdr);
2432        encode_getfattr(xdr, args->bitmask, &hdr);
2433        encode_nops(&hdr);
2434}
2435
2436/*
2437 * Encode a GETACL request
2438 */
2439static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2440                                struct nfs_getaclargs *args)
2441{
2442        struct compound_hdr hdr = {
2443                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2444        };
2445        uint32_t replen;
2446
2447        encode_compound_hdr(xdr, req, &hdr);
2448        encode_sequence(xdr, &args->seq_args, &hdr);
2449        encode_putfh(xdr, args->fh, &hdr);
2450        replen = hdr.replen + op_decode_hdr_maxsz + 1;
2451        encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2452
2453        xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2454                args->acl_pages, args->acl_pgbase, args->acl_len);
2455
2456        encode_nops(&hdr);
2457}
2458
2459/*
2460 * Encode a WRITE request
2461 */
2462static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2463                               struct nfs_writeargs *args)
2464{
2465        struct compound_hdr hdr = {
2466                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2467        };
2468
2469        encode_compound_hdr(xdr, req, &hdr);
2470        encode_sequence(xdr, &args->seq_args, &hdr);
2471        encode_putfh(xdr, args->fh, &hdr);
2472        encode_write(xdr, args, &hdr);
2473        req->rq_snd_buf.flags |= XDRBUF_WRITE;
2474        if (args->bitmask)
2475                encode_getfattr(xdr, args->bitmask, &hdr);
2476        encode_nops(&hdr);
2477}
2478
2479/*
2480 *  a COMMIT request
2481 */
2482static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2483                                struct nfs_commitargs *args)
2484{
2485        struct compound_hdr hdr = {
2486                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2487        };
2488
2489        encode_compound_hdr(xdr, req, &hdr);
2490        encode_sequence(xdr, &args->seq_args, &hdr);
2491        encode_putfh(xdr, args->fh, &hdr);
2492        encode_commit(xdr, args, &hdr);
2493        encode_nops(&hdr);
2494}
2495
2496/*
2497 * FSINFO request
2498 */
2499static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2500                                struct nfs4_fsinfo_arg *args)
2501{
2502        struct compound_hdr hdr = {
2503                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2504        };
2505
2506        encode_compound_hdr(xdr, req, &hdr);
2507        encode_sequence(xdr, &args->seq_args, &hdr);
2508        encode_putfh(xdr, args->fh, &hdr);
2509        encode_fsinfo(xdr, args->bitmask, &hdr);
2510        encode_nops(&hdr);
2511}
2512
2513/*
2514 * a PATHCONF request
2515 */
2516static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2517                                  const struct nfs4_pathconf_arg *args)
2518{
2519        struct compound_hdr hdr = {
2520                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2521        };
2522
2523        encode_compound_hdr(xdr, req, &hdr);
2524        encode_sequence(xdr, &args->seq_args, &hdr);
2525        encode_putfh(xdr, args->fh, &hdr);
2526        encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2527                           &hdr);
2528        encode_nops(&hdr);
2529}
2530
2531/*
2532 * a STATFS request
2533 */
2534static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2535                                const struct nfs4_statfs_arg *args)
2536{
2537        struct compound_hdr hdr = {
2538                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2539        };
2540
2541        encode_compound_hdr(xdr, req, &hdr);
2542        encode_sequence(xdr, &args->seq_args, &hdr);
2543        encode_putfh(xdr, args->fh, &hdr);
2544        encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2545                           args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2546        encode_nops(&hdr);
2547}
2548
2549/*
2550 * GETATTR_BITMAP request
2551 */
2552static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2553                                     struct xdr_stream *xdr,
2554                                     struct nfs4_server_caps_arg *args)
2555{
2556        struct compound_hdr hdr = {
2557                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2558        };
2559
2560        encode_compound_hdr(xdr, req, &hdr);
2561        encode_sequence(xdr, &args->seq_args, &hdr);
2562        encode_putfh(xdr, args->fhandle, &hdr);
2563        encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2564                           FATTR4_WORD0_FH_EXPIRE_TYPE|
2565                           FATTR4_WORD0_LINK_SUPPORT|
2566                           FATTR4_WORD0_SYMLINK_SUPPORT|
2567                           FATTR4_WORD0_ACLSUPPORT, &hdr);
2568        encode_nops(&hdr);
2569}
2570
2571/*
2572 * a RENEW request
2573 */
2574static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2575                               struct nfs_client *clp)
2576{
2577        struct compound_hdr hdr = {
2578                .nops   = 0,
2579        };
2580
2581        encode_compound_hdr(xdr, req, &hdr);
2582        encode_renew(xdr, clp->cl_clientid, &hdr);
2583        encode_nops(&hdr);
2584}
2585
2586/*
2587 * a SETCLIENTID request
2588 */
2589static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2590                                     struct xdr_stream *xdr,
2591                                     struct nfs4_setclientid *sc)
2592{
2593        struct compound_hdr hdr = {
2594                .nops   = 0,
2595        };
2596
2597        encode_compound_hdr(xdr, req, &hdr);
2598        encode_setclientid(xdr, sc, &hdr);
2599        encode_nops(&hdr);
2600}
2601
2602/*
2603 * a SETCLIENTID_CONFIRM request
2604 */
2605static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2606                                             struct xdr_stream *xdr,
2607                                             struct nfs4_setclientid_res *arg)
2608{
2609        struct compound_hdr hdr = {
2610                .nops   = 0,
2611        };
2612        const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2613
2614        encode_compound_hdr(xdr, req, &hdr);
2615        encode_setclientid_confirm(xdr, arg, &hdr);
2616        encode_putrootfh(xdr, &hdr);
2617        encode_fsinfo(xdr, lease_bitmap, &hdr);
2618        encode_nops(&hdr);
2619}
2620
2621/*
2622 * DELEGRETURN request
2623 */
2624static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2625                                     struct xdr_stream *xdr,
2626                                     const struct nfs4_delegreturnargs *args)
2627{
2628        struct compound_hdr hdr = {
2629                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2630        };
2631
2632        encode_compound_hdr(xdr, req, &hdr);
2633        encode_sequence(xdr, &args->seq_args, &hdr);
2634        encode_putfh(xdr, args->fhandle, &hdr);
2635        encode_getfattr(xdr, args->bitmask, &hdr);
2636        encode_delegreturn(xdr, args->stateid, &hdr);
2637        encode_nops(&hdr);
2638}
2639
2640/*
2641 * Encode FS_LOCATIONS request
2642 */
2643static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2644                                      struct xdr_stream *xdr,
2645                                      struct nfs4_fs_locations_arg *args)
2646{
2647        struct compound_hdr hdr = {
2648                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2649        };
2650        uint32_t replen;
2651
2652        encode_compound_hdr(xdr, req, &hdr);
2653        encode_sequence(xdr, &args->seq_args, &hdr);
2654        encode_putfh(xdr, args->dir_fh, &hdr);
2655        encode_lookup(xdr, args->name, &hdr);
2656        replen = hdr.replen;    /* get the attribute into args->page */
2657        encode_fs_locations(xdr, args->bitmask, &hdr);
2658
2659        xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2660                        0, PAGE_SIZE);
2661        encode_nops(&hdr);
2662}
2663
2664/*
2665 * Encode SECINFO request
2666 */
2667static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2668                                struct xdr_stream *xdr,
2669                                struct nfs4_secinfo_arg *args)
2670{
2671        struct compound_hdr hdr = {
2672                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2673        };
2674
2675        encode_compound_hdr(xdr, req, &hdr);
2676        encode_sequence(xdr, &args->seq_args, &hdr);
2677        encode_putfh(xdr, args->dir_fh, &hdr);
2678        encode_secinfo(xdr, args->name, &hdr);
2679        encode_nops(&hdr);
2680}
2681
2682#if defined(CONFIG_NFS_V4_1)
2683/*
2684 * BIND_CONN_TO_SESSION request
2685 */
2686static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2687                                struct xdr_stream *xdr,
2688                                struct nfs_client *clp)
2689{
2690        struct compound_hdr hdr = {
2691                .minorversion = clp->cl_mvops->minor_version,
2692        };
2693
2694        encode_compound_hdr(xdr, req, &hdr);
2695        encode_bind_conn_to_session(xdr, clp->cl_session, &hdr);
2696        encode_nops(&hdr);
2697}
2698
2699/*
2700 * EXCHANGE_ID request
2701 */
2702static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2703                                     struct xdr_stream *xdr,
2704                                     struct nfs41_exchange_id_args *args)
2705{
2706        struct compound_hdr hdr = {
2707                .minorversion = args->client->cl_mvops->minor_version,
2708        };
2709
2710        encode_compound_hdr(xdr, req, &hdr);
2711        encode_exchange_id(xdr, args, &hdr);
2712        encode_nops(&hdr);
2713}
2714
2715/*
2716 * a CREATE_SESSION request
2717 */
2718static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2719                                        struct xdr_stream *xdr,
2720                                        struct nfs41_create_session_args *args)
2721{
2722        struct compound_hdr hdr = {
2723                .minorversion = args->client->cl_mvops->minor_version,
2724        };
2725
2726        encode_compound_hdr(xdr, req, &hdr);
2727        encode_create_session(xdr, args, &hdr);
2728        encode_nops(&hdr);
2729}
2730
2731/*
2732 * a DESTROY_SESSION request
2733 */
2734static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2735                                         struct xdr_stream *xdr,
2736                                         struct nfs4_session *session)
2737{
2738        struct compound_hdr hdr = {
2739                .minorversion = session->clp->cl_mvops->minor_version,
2740        };
2741
2742        encode_compound_hdr(xdr, req, &hdr);
2743        encode_destroy_session(xdr, session, &hdr);
2744        encode_nops(&hdr);
2745}
2746
2747/*
2748 * a DESTROY_CLIENTID request
2749 */
2750static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2751                                         struct xdr_stream *xdr,
2752                                         struct nfs_client *clp)
2753{
2754        struct compound_hdr hdr = {
2755                .minorversion = clp->cl_mvops->minor_version,
2756        };
2757
2758        encode_compound_hdr(xdr, req, &hdr);
2759        encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2760        encode_nops(&hdr);
2761}
2762
2763/*
2764 * a SEQUENCE request
2765 */
2766static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2767                                  struct nfs4_sequence_args *args)
2768{
2769        struct compound_hdr hdr = {
2770                .minorversion = nfs4_xdr_minorversion(args),
2771        };
2772
2773        encode_compound_hdr(xdr, req, &hdr);
2774        encode_sequence(xdr, args, &hdr);
2775        encode_nops(&hdr);
2776}
2777
2778/*
2779 * a GET_LEASE_TIME request
2780 */
2781static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2782                                        struct xdr_stream *xdr,
2783                                        struct nfs4_get_lease_time_args *args)
2784{
2785        struct compound_hdr hdr = {
2786                .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2787        };
2788        const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2789
2790        encode_compound_hdr(xdr, req, &hdr);
2791        encode_sequence(xdr, &args->la_seq_args, &hdr);
2792        encode_putrootfh(xdr, &hdr);
2793        encode_fsinfo(xdr, lease_bitmap, &hdr);
2794        encode_nops(&hdr);
2795}
2796
2797/*
2798 * a RECLAIM_COMPLETE request
2799 */
2800static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2801                                          struct xdr_stream *xdr,
2802                                struct nfs41_reclaim_complete_args *args)
2803{
2804        struct compound_hdr hdr = {
2805                .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2806        };
2807
2808        encode_compound_hdr(xdr, req, &hdr);
2809        encode_sequence(xdr, &args->seq_args, &hdr);
2810        encode_reclaim_complete(xdr, args, &hdr);
2811        encode_nops(&hdr);
2812}
2813
2814/*
2815 * Encode GETDEVICELIST request
2816 */
2817static void nfs4_xdr_enc_getdevicelist(struct rpc_rqst *req,
2818                                       struct xdr_stream *xdr,
2819                                       struct nfs4_getdevicelist_args *args)
2820{
2821        struct compound_hdr hdr = {
2822                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2823        };
2824
2825        encode_compound_hdr(xdr, req, &hdr);
2826        encode_sequence(xdr, &args->seq_args, &hdr);
2827        encode_putfh(xdr, args->fh, &hdr);
2828        encode_getdevicelist(xdr, args, &hdr);
2829        encode_nops(&hdr);
2830}
2831
2832/*
2833 * Encode GETDEVICEINFO request
2834 */
2835static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2836                                       struct xdr_stream *xdr,
2837                                       struct nfs4_getdeviceinfo_args *args)
2838{
2839        struct compound_hdr hdr = {
2840                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2841        };
2842
2843        encode_compound_hdr(xdr, req, &hdr);
2844        encode_sequence(xdr, &args->seq_args, &hdr);
2845        encode_getdeviceinfo(xdr, args, &hdr);
2846
2847        /* set up reply kvec. Subtract notification bitmap max size (2)
2848         * so that notification bitmap is put in xdr_buf tail */
2849        xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2850                         args->pdev->pages, args->pdev->pgbase,
2851                         args->pdev->pglen);
2852
2853        encode_nops(&hdr);
2854}
2855
2856/*
2857 *  Encode LAYOUTGET request
2858 */
2859static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2860                                   struct xdr_stream *xdr,
2861                                   struct nfs4_layoutget_args *args)
2862{
2863        struct compound_hdr hdr = {
2864                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2865        };
2866
2867        encode_compound_hdr(xdr, req, &hdr);
2868        encode_sequence(xdr, &args->seq_args, &hdr);
2869        encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2870        encode_layoutget(xdr, args, &hdr);
2871
2872        xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2873            args->layout.pages, 0, args->layout.pglen);
2874
2875        encode_nops(&hdr);
2876}
2877
2878/*
2879 *  Encode LAYOUTCOMMIT request
2880 */
2881static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2882                                      struct xdr_stream *xdr,
2883                                      struct nfs4_layoutcommit_args *args)
2884{
2885        struct nfs4_layoutcommit_data *data =
2886                container_of(args, struct nfs4_layoutcommit_data, args);
2887        struct compound_hdr hdr = {
2888                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2889        };
2890
2891        encode_compound_hdr(xdr, req, &hdr);
2892        encode_sequence(xdr, &args->seq_args, &hdr);
2893        encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2894        encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2895        encode_getfattr(xdr, args->bitmask, &hdr);
2896        encode_nops(&hdr);
2897}
2898
2899/*
2900 * Encode LAYOUTRETURN request
2901 */
2902static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2903                                      struct xdr_stream *xdr,
2904                                      struct nfs4_layoutreturn_args *args)
2905{
2906        struct compound_hdr hdr = {
2907                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2908        };
2909
2910        encode_compound_hdr(xdr, req, &hdr);
2911        encode_sequence(xdr, &args->seq_args, &hdr);
2912        encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2913        encode_layoutreturn(xdr, args, &hdr);
2914        encode_nops(&hdr);
2915}
2916
2917/*
2918 * Encode SECINFO_NO_NAME request
2919 */
2920static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
2921                                        struct xdr_stream *xdr,
2922                                        struct nfs41_secinfo_no_name_args *args)
2923{
2924        struct compound_hdr hdr = {
2925                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2926        };
2927
2928        encode_compound_hdr(xdr, req, &hdr);
2929        encode_sequence(xdr, &args->seq_args, &hdr);
2930        encode_putrootfh(xdr, &hdr);
2931        encode_secinfo_no_name(xdr, args, &hdr);
2932        encode_nops(&hdr);
2933        return 0;
2934}
2935
2936/*
2937 *  Encode TEST_STATEID request
2938 */
2939static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
2940                                      struct xdr_stream *xdr,
2941                                      struct nfs41_test_stateid_args *args)
2942{
2943        struct compound_hdr hdr = {
2944                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2945        };
2946
2947        encode_compound_hdr(xdr, req, &hdr);
2948        encode_sequence(xdr, &args->seq_args, &hdr);
2949        encode_test_stateid(xdr, args, &hdr);
2950        encode_nops(&hdr);
2951}
2952
2953/*
2954 *  Encode FREE_STATEID request
2955 */
2956static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
2957                                     struct xdr_stream *xdr,
2958                                     struct nfs41_free_stateid_args *args)
2959{
2960        struct compound_hdr hdr = {
2961                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2962        };
2963
2964        encode_compound_hdr(xdr, req, &hdr);
2965        encode_sequence(xdr, &args->seq_args, &hdr);
2966        encode_free_stateid(xdr, args, &hdr);
2967        encode_nops(&hdr);
2968}
2969#endif /* CONFIG_NFS_V4_1 */
2970
2971static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
2972{
2973        dprintk("nfs: %s: prematurely hit end of receive buffer. "
2974                "Remaining buffer length is %tu words.\n",
2975                func, xdr->end - xdr->p);
2976}
2977
2978static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2979{
2980        __be32 *p;
2981
2982        p = xdr_inline_decode(xdr, 4);
2983        if (unlikely(!p))
2984                goto out_overflow;
2985        *len = be32_to_cpup(p);
2986        p = xdr_inline_decode(xdr, *len);
2987        if (unlikely(!p))
2988                goto out_overflow;
2989        *string = (char *)p;
2990        return 0;
2991out_overflow:
2992        print_overflow_msg(__func__, xdr);
2993        return -EIO;
2994}
2995
2996static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2997{
2998        __be32 *p;
2999
3000        p = xdr_inline_decode(xdr, 8);
3001        if (unlikely(!p))
3002                goto out_overflow;
3003        hdr->status = be32_to_cpup(p++);
3004        hdr->taglen = be32_to_cpup(p);
3005
3006        p = xdr_inline_decode(xdr, hdr->taglen + 4);
3007        if (unlikely(!p))
3008                goto out_overflow;
3009        hdr->tag = (char *)p;
3010        p += XDR_QUADLEN(hdr->taglen);
3011        hdr->nops = be32_to_cpup(p);
3012        if (unlikely(hdr->nops < 1))
3013                return nfs4_stat_to_errno(hdr->status);
3014        return 0;
3015out_overflow:
3016        print_overflow_msg(__func__, xdr);
3017        return -EIO;
3018}
3019
3020static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3021{
3022        __be32 *p;
3023        uint32_t opnum;
3024        int32_t nfserr;
3025
3026        p = xdr_inline_decode(xdr, 8);
3027        if (unlikely(!p))
3028                goto out_overflow;
3029        opnum = be32_to_cpup(p++);
3030        if (opnum != expected) {
3031                dprintk("nfs: Server returned operation"
3032                        " %d but we issued a request for %d\n",
3033                                opnum, expected);
3034                return -EIO;
3035        }
3036        nfserr = be32_to_cpup(p);
3037        if (nfserr != NFS_OK)
3038                return nfs4_stat_to_errno(nfserr);
3039        return 0;
3040out_overflow:
3041        print_overflow_msg(__func__, xdr);
3042        return -EIO;
3043}
3044
3045/* Dummy routine */
3046static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
3047{
3048        __be32 *p;
3049        unsigned int strlen;
3050        char *str;
3051
3052        p = xdr_inline_decode(xdr, 12);
3053        if (likely(p))
3054                return decode_opaque_inline(xdr, &strlen, &str);
3055        print_overflow_msg(__func__, xdr);
3056        return -EIO;
3057}
3058
3059static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3060{
3061        uint32_t bmlen;
3062        __be32 *p;
3063
3064        p = xdr_inline_decode(xdr, 4);
3065        if (unlikely(!p))
3066                goto out_overflow;
3067        bmlen = be32_to_cpup(p);
3068
3069        bitmap[0] = bitmap[1] = bitmap[2] = 0;
3070        p = xdr_inline_decode(xdr, (bmlen << 2));
3071        if (unlikely(!p))
3072                goto out_overflow;
3073        if (bmlen > 0) {
3074                bitmap[0] = be32_to_cpup(p++);
3075                if (bmlen > 1) {
3076                        bitmap[1] = be32_to_cpup(p++);
3077                        if (bmlen > 2)
3078                                bitmap[2] = be32_to_cpup(p);
3079                }
3080        }
3081        return 0;
3082out_overflow:
3083        print_overflow_msg(__func__, xdr);
3084        return -EIO;
3085}
3086
3087static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3088{
3089        __be32 *p;
3090
3091        p = xdr_inline_decode(xdr, 4);
3092        if (unlikely(!p))
3093                goto out_overflow;
3094        *attrlen = be32_to_cpup(p);
3095        *savep = xdr_stream_pos(xdr);
3096        return 0;
3097out_overflow:
3098        print_overflow_msg(__func__, xdr);
3099        return -EIO;
3100}
3101
3102static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3103{
3104        if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3105                int ret;
3106                ret = decode_attr_bitmap(xdr, bitmask);
3107                if (unlikely(ret < 0))
3108                        return ret;
3109                bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3110        } else
3111                bitmask[0] = bitmask[1] = bitmask[2] = 0;
3112        dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3113                bitmask[0], bitmask[1], bitmask[2]);
3114        return 0;
3115}
3116
3117static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3118{
3119        __be32 *p;
3120        int ret = 0;
3121
3122        *type = 0;
3123        if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3124                return -EIO;
3125        if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3126                p = xdr_inline_decode(xdr, 4);
3127                if (unlikely(!p))
3128                        goto out_overflow;
3129                *type = be32_to_cpup(p);
3130                if (*type < NF4REG || *type > NF4NAMEDATTR) {
3131                        dprintk("%s: bad type %d\n", __func__, *type);
3132                        return -EIO;
3133                }
3134                bitmap[0] &= ~FATTR4_WORD0_TYPE;
3135                ret = NFS_ATTR_FATTR_TYPE;
3136        }
3137        dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3138        return ret;
3139out_overflow:
3140        print_overflow_msg(__func__, xdr);
3141        return -EIO;
3142}
3143
3144static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3145                                      uint32_t *bitmap, uint32_t *type)
3146{
3147        __be32 *p;
3148
3149        *type = 0;
3150        if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3151                return -EIO;
3152        if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3153                p = xdr_inline_decode(xdr, 4);
3154                if (unlikely(!p))
3155                        goto out_overflow;
3156                *type = be32_to_cpup(p);
3157                bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3158        }
3159        dprintk("%s: expire type=0x%x\n", __func__, *type);
3160        return 0;
3161out_overflow:
3162        print_overflow_msg(__func__, xdr);
3163        return -EIO;
3164}
3165
3166static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3167{
3168        __be32 *p;
3169        int ret = 0;
3170
3171        *change = 0;
3172        if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3173                return -EIO;
3174        if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3175                p = xdr_inline_decode(xdr, 8);
3176                if (unlikely(!p))
3177                        goto out_overflow;
3178                xdr_decode_hyper(p, change);
3179                bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3180                ret = NFS_ATTR_FATTR_CHANGE;
3181        }
3182        dprintk("%s: change attribute=%Lu\n", __func__,
3183                        (unsigned long long)*change);
3184        return ret;
3185out_overflow:
3186        print_overflow_msg(__func__, xdr);
3187        return -EIO;
3188}
3189
3190static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3191{
3192        __be32 *p;
3193        int ret = 0;
3194
3195        *size = 0;
3196        if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3197                return -EIO;
3198        if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3199                p = xdr_inline_decode(xdr, 8);
3200                if (unlikely(!p))
3201                        goto out_overflow;
3202                xdr_decode_hyper(p, size);
3203                bitmap[0] &= ~FATTR4_WORD0_SIZE;
3204                ret = NFS_ATTR_FATTR_SIZE;
3205        }
3206        dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3207        return ret;
3208out_overflow:
3209        print_overflow_msg(__func__, xdr);
3210        return -EIO;
3211}
3212
3213static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3214{
3215        __be32 *p;
3216
3217        *res = 0;
3218        if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3219                return -EIO;
3220        if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3221                p = xdr_inline_decode(xdr, 4);
3222                if (unlikely(!p))
3223                        goto out_overflow;
3224                *res = be32_to_cpup(p);
3225                bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3226        }
3227        dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3228        return 0;
3229out_overflow:
3230        print_overflow_msg(__func__, xdr);
3231        return -EIO;
3232}
3233
3234static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3235{
3236        __be32 *p;
3237
3238        *res = 0;
3239        if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3240                return -EIO;
3241        if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3242                p = xdr_inline_decode(xdr, 4);
3243                if (unlikely(!p))
3244                        goto out_overflow;
3245                *res = be32_to_cpup(p);
3246                bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3247        }
3248        dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3249        return 0;
3250out_overflow:
3251        print_overflow_msg(__func__, xdr);
3252        return -EIO;
3253}
3254
3255static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3256{
3257        __be32 *p;
3258        int ret = 0;
3259
3260        fsid->major = 0;
3261        fsid->minor = 0;
3262        if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3263                return -EIO;
3264        if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3265                p = xdr_inline_decode(xdr, 16);
3266                if (unlikely(!p))
3267                        goto out_overflow;
3268                p = xdr_decode_hyper(p, &fsid->major);
3269                xdr_decode_hyper(p, &fsid->minor);
3270                bitmap[0] &= ~FATTR4_WORD0_FSID;
3271                ret = NFS_ATTR_FATTR_FSID;
3272        }
3273        dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3274                        (unsigned long long)fsid->major,
3275                        (unsigned long long)fsid->minor);
3276        return ret;
3277out_overflow:
3278        print_overflow_msg(__func__, xdr);
3279        return -EIO;
3280}
3281
3282static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3283{
3284        __be32 *p;
3285
3286        *res = 60;
3287        if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3288                return -EIO;
3289        if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3290                p = xdr_inline_decode(xdr, 4);
3291                if (unlikely(!p))
3292                        goto out_overflow;
3293                *res = be32_to_cpup(p);
3294                bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3295        }
3296        dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3297        return 0;
3298out_overflow:
3299        print_overflow_msg(__func__, xdr);
3300        return -EIO;
3301}
3302
3303static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3304{
3305        __be32 *p;
3306
3307        if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3308                return -EIO;
3309        if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3310                p = xdr_inline_decode(xdr, 4);
3311                if (unlikely(!p))
3312                        goto out_overflow;
3313                bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3314                *res = -be32_to_cpup(p);
3315        }
3316        return 0;
3317out_overflow:
3318        print_overflow_msg(__func__, xdr);
3319        return -EIO;
3320}
3321
3322static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3323{
3324        __be32 *p;
3325        int len;
3326
3327        if (fh != NULL)
3328                memset(fh, 0, sizeof(*fh));
3329
3330        if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3331                return -EIO;
3332        if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3333                p = xdr_inline_decode(xdr, 4);
3334                if (unlikely(!p))
3335                        goto out_overflow;
3336                len = be32_to_cpup(p);
3337                if (len > NFS4_FHSIZE)
3338                        return -EIO;
3339                p = xdr_inline_decode(xdr, len);
3340                if (unlikely(!p))
3341                        goto out_overflow;
3342                if (fh != NULL) {
3343                        memcpy(fh->data, p, len);
3344                        fh->size = len;
3345                }
3346                bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3347        }
3348        return 0;
3349out_overflow:
3350        print_overflow_msg(__func__, xdr);
3351        return -EIO;
3352}
3353
3354static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3355{
3356        __be32 *p;
3357
3358        *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
3359        if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3360                return -EIO;
3361        if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3362                p = xdr_inline_decode(xdr, 4);
3363                if (unlikely(!p))
3364                        goto out_overflow;
3365                *res = be32_to_cpup(p);
3366                bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3367        }
3368        dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3369        return 0;
3370out_overflow:
3371        print_overflow_msg(__func__, xdr);
3372        return -EIO;
3373}
3374
3375static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3376{
3377        __be32 *p;
3378        int ret = 0;
3379
3380        *fileid = 0;
3381        if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3382                return -EIO;
3383        if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3384                p = xdr_inline_decode(xdr, 8);
3385                if (unlikely(!p))
3386                        goto out_overflow;
3387                xdr_decode_hyper(p, fileid);
3388                bitmap[0] &= ~FATTR4_WORD0_FILEID;
3389                ret = NFS_ATTR_FATTR_FILEID;
3390        }
3391        dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3392        return ret;
3393out_overflow:
3394        print_overflow_msg(__func__, xdr);
3395        return -EIO;
3396}
3397
3398static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3399{
3400        __be32 *p;
3401        int ret = 0;
3402
3403        *fileid = 0;
3404        if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3405                return -EIO;
3406        if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3407                p = xdr_inline_decode(xdr, 8);
3408                if (unlikely(!p))
3409                        goto out_overflow;
3410                xdr_decode_hyper(p, fileid);
3411                bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3412                ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3413        }
3414        dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3415        return ret;
3416out_overflow:
3417        print_overflow_msg(__func__, xdr);
3418        return -EIO;
3419}
3420
3421static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3422{
3423        __be32 *p;
3424        int status = 0;
3425
3426        *res = 0;
3427        if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3428                return -EIO;
3429        if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3430                p = xdr_inline_decode(xdr, 8);
3431                if (unlikely(!p))
3432                        goto out_overflow;
3433                xdr_decode_hyper(p, res);
3434                bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3435        }
3436        dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3437        return status;
3438out_overflow:
3439        print_overflow_msg(__func__, xdr);
3440        return -EIO;
3441}
3442
3443static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3444{
3445        __be32 *p;
3446        int status = 0;
3447
3448        *res = 0;
3449        if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3450                return -EIO;
3451        if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3452                p = xdr_inline_decode(xdr, 8);
3453                if (unlikely(!p))
3454                        goto out_overflow;
3455                xdr_decode_hyper(p, res);
3456                bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3457        }
3458        dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3459        return status;
3460out_overflow:
3461        print_overflow_msg(__func__, xdr);
3462        return -EIO;
3463}
3464
3465static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3466{
3467        __be32 *p;
3468        int status = 0;
3469
3470        *res = 0;
3471        if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3472                return -EIO;
3473        if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3474                p = xdr_inline_decode(xdr, 8);
3475                if (unlikely(!p))
3476                        goto out_overflow;
3477                xdr_decode_hyper(p, res);
3478                bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3479        }
3480        dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3481        return status;
3482out_overflow:
3483        print_overflow_msg(__func__, xdr);
3484        return -EIO;
3485}
3486
3487static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3488{
3489        u32 n;
3490        __be32 *p;
3491        int status = 0;
3492
3493        p = xdr_inline_decode(xdr, 4);
3494        if (unlikely(!p))
3495                goto out_overflow;
3496        n = be32_to_cpup(p);
3497        if (n == 0)
3498                goto root_path;
3499        dprintk("pathname4: ");
3500        path->ncomponents = 0;
3501        while (path->ncomponents < n) {
3502                struct nfs4_string *component = &path->components[path->ncomponents];
3503                status = decode_opaque_inline(xdr, &component->len, &component->data);
3504                if (unlikely(status != 0))
3505                        goto out_eio;
3506                ifdebug (XDR)
3507                        pr_cont("%s%.*s ",
3508                                (path->ncomponents != n ? "/ " : ""),
3509                                component->len, component->data);
3510                if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
3511                        path->ncomponents++;
3512                else {
3513                        dprintk("cannot parse %d components in path\n", n);
3514                        goto out_eio;
3515                }
3516        }
3517out:
3518        return status;
3519root_path:
3520/* a root pathname is sent as a zero component4 */
3521        path->ncomponents = 1;
3522        path->components[0].len=0;
3523        path->components[0].data=NULL;
3524        dprintk("pathname4: /\n");
3525        goto out;
3526out_eio:
3527        dprintk(" status %d", status);
3528        status = -EIO;
3529        goto out;
3530out_overflow:
3531        print_overflow_msg(__func__, xdr);
3532        return -EIO;
3533}
3534
3535static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3536{
3537        int n;
3538        __be32 *p;
3539        int status = -EIO;
3540
3541        if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3542                goto out;
3543        status = 0;
3544        if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3545                goto out;
3546        status = -EIO;
3547        /* Ignore borken servers that return unrequested attrs */
3548        if (unlikely(res == NULL))
3549                goto out;
3550        dprintk("%s: fsroot:\n", __func__);
3551        status = decode_pathname(xdr, &res->fs_path);
3552        if (unlikely(status != 0))
3553                goto out;
3554        p = xdr_inline_decode(xdr, 4);
3555        if (unlikely(!p))
3556                goto out_overflow;
3557        n = be32_to_cpup(p);
3558        if (n <= 0)
3559                goto out_eio;
3560        res->nlocations = 0;
3561        while (res->nlocations < n) {
3562                u32 m;
3563                struct nfs4_fs_location *loc = &res->locations[res->nlocations];
3564
3565                p = xdr_inline_decode(xdr, 4);
3566                if (unlikely(!p))
3567                        goto out_overflow;
3568                m = be32_to_cpup(p);
3569
3570                loc->nservers = 0;
3571                dprintk("%s: servers:\n", __func__);
3572                while (loc->nservers < m) {
3573                        struct nfs4_string *server = &loc->servers[loc->nservers];
3574                        status = decode_opaque_inline(xdr, &server->len, &server->data);
3575                        if (unlikely(status != 0))
3576                                goto out_eio;
3577                        dprintk("%s ", server->data);
3578                        if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
3579                                loc->nservers++;
3580                        else {
3581                                unsigned int i;
3582                                dprintk("%s: using first %u of %u servers "
3583                                        "returned for location %u\n",
3584                                                __func__,
3585                                                NFS4_FS_LOCATION_MAXSERVERS,
3586                                                m, res->nlocations);
3587                                for (i = loc->nservers; i < m; i++) {
3588                                        unsigned int len;
3589                                        char *data;
3590                                        status = decode_opaque_inline(xdr, &len, &data);
3591                                        if (unlikely(status != 0))
3592                                                goto out_eio;
3593                                }
3594                        }
3595                }
3596                status = decode_pathname(xdr, &loc->rootpath);
3597                if (unlikely(status != 0))
3598                        goto out_eio;
3599                if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
3600                        res->nlocations++;
3601        }
3602        if (res->nlocations != 0)
3603                status = NFS_ATTR_FATTR_V4_LOCATIONS;
3604out:
3605        dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3606        return status;
3607out_overflow:
3608        print_overflow_msg(__func__, xdr);
3609out_eio:
3610        status = -EIO;
3611        goto out;
3612}
3613
3614static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3615{
3616        __be32 *p;
3617        int status = 0;
3618
3619        *res = 0;
3620        if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3621                return -EIO;
3622        if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3623                p = xdr_inline_decode(xdr, 8);
3624                if (unlikely(!p))
3625                        goto out_overflow;
3626                xdr_decode_hyper(p, res);
3627                bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3628        }
3629        dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3630        return status;
3631out_overflow:
3632        print_overflow_msg(__func__, xdr);
3633        return -EIO;
3634}
3635
3636static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3637{
3638        __be32 *p;
3639        int status = 0;
3640
3641        *maxlink = 1;
3642        if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3643                return -EIO;
3644        if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3645                p = xdr_inline_decode(xdr, 4);
3646                if (unlikely(!p))
3647                        goto out_overflow;
3648                *maxlink = be32_to_cpup(p);
3649                bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3650        }
3651        dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3652        return status;
3653out_overflow:
3654        print_overflow_msg(__func__, xdr);
3655        return -EIO;
3656}
3657
3658static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3659{
3660        __be32 *p;
3661        int status = 0;
3662
3663        *maxname = 1024;
3664        if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3665                return -EIO;
3666        if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3667                p = xdr_inline_decode(xdr, 4);
3668                if (unlikely(!p))
3669                        goto out_overflow;
3670                *maxname = be32_to_cpup(p);
3671                bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3672        }
3673        dprintk("%s: maxname=%u\n", __func__, *maxname);
3674        return status;
3675out_overflow:
3676        print_overflow_msg(__func__, xdr);
3677        return -EIO;
3678}
3679
3680static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3681{
3682        __be32 *p;
3683        int status = 0;
3684
3685        *res = 1024;
3686        if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3687                return -EIO;
3688        if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3689                uint64_t maxread;
3690                p = xdr_inline_decode(xdr, 8);
3691                if (unlikely(!p))
3692                        goto out_overflow;
3693                xdr_decode_hyper(p, &maxread);
3694                if (maxread > 0x7FFFFFFF)
3695                        maxread = 0x7FFFFFFF;
3696                *res = (uint32_t)maxread;
3697                bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3698        }
3699        dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3700        return status;
3701out_overflow:
3702        print_overflow_msg(__func__, xdr);
3703        return -EIO;
3704}
3705
3706static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3707{
3708        __be32 *p;
3709        int status = 0;
3710
3711        *res = 1024;
3712        if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3713                return -EIO;
3714        if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3715                uint64_t maxwrite;
3716                p = xdr_inline_decode(xdr, 8);
3717                if (unlikely(!p))
3718                        goto out_overflow;
3719                xdr_decode_hyper(p, &maxwrite);
3720                if (maxwrite > 0x7FFFFFFF)
3721                        maxwrite = 0x7FFFFFFF;
3722                *res = (uint32_t)maxwrite;
3723                bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3724        }
3725        dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3726        return status;
3727out_overflow:
3728        print_overflow_msg(__func__, xdr);
3729        return -EIO;
3730}
3731
3732static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3733{
3734        uint32_t tmp;
3735        __be32 *p;
3736        int ret = 0;
3737
3738        *mode = 0;
3739        if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3740                return -EIO;
3741        if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3742                p = xdr_inline_decode(xdr, 4);
3743                if (unlikely(!p))
3744                        goto out_overflow;
3745                tmp = be32_to_cpup(p);
3746                *mode = tmp & ~S_IFMT;
3747                bitmap[1] &= ~FATTR4_WORD1_MODE;
3748                ret = NFS_ATTR_FATTR_MODE;
3749        }
3750        dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3751        return ret;
3752out_overflow:
3753        print_overflow_msg(__func__, xdr);
3754        return -EIO;
3755}
3756
3757static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3758{
3759        __be32 *p;
3760        int ret = 0;
3761
3762        *nlink = 1;
3763        if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3764                return -EIO;
3765        if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3766                p = xdr_inline_decode(xdr, 4);
3767                if (unlikely(!p))
3768                        goto out_overflow;
3769                *nlink = be32_to_cpup(p);
3770                bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3771                ret = NFS_ATTR_FATTR_NLINK;
3772        }
3773        dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3774        return ret;
3775out_overflow:
3776        print_overflow_msg(__func__, xdr);
3777        return -EIO;
3778}
3779
3780static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3781                const struct nfs_server *server, uint32_t *uid,
3782                struct nfs4_string *owner_name)
3783{
3784        uint32_t len;
3785        __be32 *p;
3786        int ret = 0;
3787
3788        *uid = -2;
3789        if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3790                return -EIO;
3791        if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3792                p = xdr_inline_decode(xdr, 4);
3793                if (unlikely(!p))
3794                        goto out_overflow;
3795                len = be32_to_cpup(p);
3796                p = xdr_inline_decode(xdr, len);
3797                if (unlikely(!p))
3798                        goto out_overflow;
3799                if (owner_name != NULL) {
3800                        owner_name->data = kmemdup(p, len, GFP_NOWAIT);
3801                        if (owner_name->data != NULL) {
3802                                owner_name->len = len;
3803                                ret = NFS_ATTR_FATTR_OWNER_NAME;
3804                        }
3805                } else if (len < XDR_MAX_NETOBJ) {
3806                        if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3807                                ret = NFS_ATTR_FATTR_OWNER;
3808                        else
3809                                dprintk("%s: nfs_map_name_to_uid failed!\n",
3810                                                __func__);
3811                } else
3812                        dprintk("%s: name too long (%u)!\n",
3813                                        __func__, len);
3814                bitmap[1] &= ~FATTR4_WORD1_OWNER;
3815        }
3816        dprintk("%s: uid=%d\n", __func__, (int)*uid);
3817        return ret;
3818out_overflow:
3819        print_overflow_msg(__func__, xdr);
3820        return -EIO;
3821}
3822
3823static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3824                const struct nfs_server *server, uint32_t *gid,
3825                struct nfs4_string *group_name)
3826{
3827        uint32_t len;
3828        __be32 *p;
3829        int ret = 0;
3830
3831        *gid = -2;
3832        if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3833                return -EIO;
3834        if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3835                p = xdr_inline_decode(xdr, 4);
3836                if (unlikely(!p))
3837                        goto out_overflow;
3838                len = be32_to_cpup(p);
3839                p = xdr_inline_decode(xdr, len);
3840                if (unlikely(!p))
3841                        goto out_overflow;
3842                if (group_name != NULL) {
3843                        group_name->data = kmemdup(p, len, GFP_NOWAIT);
3844                        if (group_name->data != NULL) {
3845                                group_name->len = len;
3846                                ret = NFS_ATTR_FATTR_GROUP_NAME;
3847                        }
3848                } else if (len < XDR_MAX_NETOBJ) {
3849                        if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3850                                ret = NFS_ATTR_FATTR_GROUP;
3851                        else
3852                                dprintk("%s: nfs_map_group_to_gid failed!\n",
3853                                                __func__);
3854                } else
3855                        dprintk("%s: name too long (%u)!\n",
3856                                        __func__, len);
3857                bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3858        }
3859        dprintk("%s: gid=%d\n", __func__, (int)*gid);
3860        return ret;
3861out_overflow:
3862        print_overflow_msg(__func__, xdr);
3863        return -EIO;
3864}
3865
3866static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3867{
3868        uint32_t major = 0, minor = 0;
3869        __be32 *p;
3870        int ret = 0;
3871
3872        *rdev = MKDEV(0,0);
3873        if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3874                return -EIO;
3875        if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3876                dev_t tmp;
3877
3878                p = xdr_inline_decode(xdr, 8);
3879                if (unlikely(!p))
3880                        goto out_overflow;
3881                major = be32_to_cpup(p++);
3882                minor = be32_to_cpup(p);
3883                tmp = MKDEV(major, minor);
3884                if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3885                        *rdev = tmp;
3886                bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3887                ret = NFS_ATTR_FATTR_RDEV;
3888        }
3889        dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3890        return ret;
3891out_overflow:
3892        print_overflow_msg(__func__, xdr);
3893        return -EIO;
3894}
3895
3896static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3897{
3898        __be32 *p;
3899        int status = 0;
3900
3901        *res = 0;
3902        if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3903                return -EIO;
3904        if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3905                p = xdr_inline_decode(xdr, 8);
3906                if (unlikely(!p))
3907                        goto out_overflow;
3908                xdr_decode_hyper(p, res);
3909                bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3910        }
3911        dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3912        return status;
3913out_overflow:
3914        print_overflow_msg(__func__, xdr);
3915        return -EIO;
3916}
3917
3918static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3919{
3920        __be32 *p;
3921        int status = 0;
3922
3923        *res = 0;
3924        if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3925                return -EIO;
3926        if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3927                p = xdr_inline_decode(xdr, 8);
3928                if (unlikely(!p))
3929                        goto out_overflow;
3930                xdr_decode_hyper(p, res);
3931                bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3932        }
3933        dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3934        return status;
3935out_overflow:
3936        print_overflow_msg(__func__, xdr);
3937        return -EIO;
3938}
3939
3940static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3941{
3942        __be32 *p;
3943        int status = 0;
3944
3945        *res = 0;
3946        if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3947                return -EIO;
3948        if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3949                p = xdr_inline_decode(xdr, 8);
3950                if (unlikely(!p))
3951                        goto out_overflow;
3952                xdr_decode_hyper(p, res);
3953                bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3954        }
3955        dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3956        return status;
3957out_overflow:
3958        print_overflow_msg(__func__, xdr);
3959        return -EIO;
3960}
3961
3962static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3963{
3964        __be32 *p;
3965        int ret = 0;
3966
3967        *used = 0;
3968        if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3969                return -EIO;
3970        if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3971                p = xdr_inline_decode(xdr, 8);
3972                if (unlikely(!p))
3973                        goto out_overflow;
3974                xdr_decode_hyper(p, used);
3975                bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3976                ret = NFS_ATTR_FATTR_SPACE_USED;
3977        }
3978        dprintk("%s: space used=%Lu\n", __func__,
3979                        (unsigned long long)*used);
3980        return ret;
3981out_overflow:
3982        print_overflow_msg(__func__, xdr);
3983        return -EIO;
3984}
3985
3986static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
3987{
3988        __be32 *p;
3989        uint64_t sec;
3990        uint32_t nsec;
3991
3992        p = xdr_inline_decode(xdr, 12);
3993        if (unlikely(!p))
3994                goto out_overflow;
3995        p = xdr_decode_hyper(p, &sec);
3996        nsec = be32_to_cpup(p);
3997        time->tv_sec = (time_t)sec;
3998        time->tv_nsec = (long)nsec;
3999        return 0;
4000out_overflow:
4001        print_overflow_msg(__func__, xdr);
4002        return -EIO;
4003}
4004
4005static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4006{
4007        int status = 0;
4008
4009        time->tv_sec = 0;
4010        time->tv_nsec = 0;
4011        if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4012                return -EIO;
4013        if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4014                status = decode_attr_time(xdr, time);
4015                if (status == 0)
4016                        status = NFS_ATTR_FATTR_ATIME;
4017                bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4018        }
4019        dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4020        return status;
4021}
4022
4023static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4024{
4025        int status = 0;
4026
4027        time->tv_sec = 0;
4028        time->tv_nsec = 0;
4029        if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4030                return -EIO;
4031        if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4032                status = decode_attr_time(xdr, time);
4033                if (status == 0)
4034                        status = NFS_ATTR_FATTR_CTIME;
4035                bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4036        }
4037        dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4038        return status;
4039}
4040
4041static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4042                                  struct timespec *time)
4043{
4044        int status = 0;
4045
4046        time->tv_sec = 0;
4047        time->tv_nsec = 0;
4048        if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4049                return -EIO;
4050        if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4051                status = decode_attr_time(xdr, time);
4052                bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4053        }
4054        dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4055                (long)time->tv_nsec);
4056        return status;
4057}
4058
4059static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4060{
4061        int status = 0;
4062
4063        time->tv_sec = 0;
4064        time->tv_nsec = 0;
4065        if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4066                return -EIO;
4067        if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4068                status = decode_attr_time(xdr, time);
4069                if (status == 0)
4070                        status = NFS_ATTR_FATTR_MTIME;
4071                bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4072        }
4073        dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4074        return status;
4075}
4076
4077static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4078{
4079        unsigned int attrwords = XDR_QUADLEN(attrlen);
4080        unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4081
4082        if (unlikely(attrwords != nwords)) {
4083                dprintk("%s: server returned incorrect attribute length: "
4084                        "%u %c %u\n",
4085                                __func__,
4086                                attrwords << 2,
4087                                (attrwords < nwords) ? '<' : '>',
4088                                nwords << 2);
4089                return -EIO;
4090        }
4091        return 0;
4092}
4093
4094static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4095{
4096        __be32 *p;
4097
4098        p = xdr_inline_decode(xdr, 20);
4099        if (unlikely(!p))
4100                goto out_overflow;
4101        cinfo->atomic = be32_to_cpup(p++);
4102        p = xdr_decode_hyper(p, &cinfo->before);
4103        xdr_decode_hyper(p, &cinfo->after);
4104        return 0;
4105out_overflow:
4106        print_overflow_msg(__func__, xdr);
4107        return -EIO;
4108}
4109
4110static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4111{
4112        __be32 *p;
4113        uint32_t supp, acc;
4114        int status;
4115
4116        status = decode_op_hdr(xdr, OP_ACCESS);
4117        if (status)
4118                return status;
4119        p = xdr_inline_decode(xdr, 8);
4120        if (unlikely(!p))
4121                goto out_overflow;
4122        supp = be32_to_cpup(p++);
4123        acc = be32_to_cpup(p);
4124        *supported = supp;
4125        *access = acc;
4126        return 0;
4127out_overflow:
4128        print_overflow_msg(__func__, xdr);
4129        return -EIO;
4130}
4131
4132static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4133{
4134        __be32 *p;
4135
4136        p = xdr_inline_decode(xdr, len);
4137        if (likely(p)) {
4138                memcpy(buf, p, len);
4139                return 0;
4140        }
4141        print_overflow_msg(__func__, xdr);
4142        return -EIO;
4143}
4144
4145static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4146{
4147        return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4148}
4149
4150static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4151{
4152        int status;
4153
4154        status = decode_op_hdr(xdr, OP_CLOSE);
4155        if (status != -EIO)
4156                nfs_increment_open_seqid(status, res->seqid);
4157        if (!status)
4158                status = decode_stateid(xdr, &res->stateid);
4159        return status;
4160}
4161
4162static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4163{
4164        return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4165}
4166
4167static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4168{
4169        return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4170}
4171
4172static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4173{
4174        int status;
4175
4176        status = decode_op_hdr(xdr, OP_COMMIT);
4177        if (!status)
4178                status = decode_write_verifier(xdr, &res->verf->verifier);
4179        return status;
4180}
4181
4182static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4183{
4184        __be32 *p;
4185        uint32_t bmlen;
4186        int status;
4187
4188        status = decode_op_hdr(xdr, OP_CREATE);
4189        if (status)
4190                return status;
4191        if ((status = decode_change_info(xdr, cinfo)))
4192                return status;
4193        p = xdr_inline_decode(xdr, 4);
4194        if (unlikely(!p))
4195                goto out_overflow;
4196        bmlen = be32_to_cpup(p);
4197        p = xdr_inline_decode(xdr, bmlen << 2);
4198        if (likely(p))
4199                return 0;
4200out_overflow:
4201        print_overflow_msg(__func__, xdr);
4202        return -EIO;
4203}
4204
4205static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4206{
4207        unsigned int savep;
4208        uint32_t attrlen, bitmap[3] = {0};
4209        int status;
4210
4211        if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4212                goto xdr_error;
4213        if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4214                goto xdr_error;
4215        if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4216                goto xdr_error;
4217        if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4218                goto xdr_error;
4219        if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4220                                                 &res->fh_expire_type)) != 0)
4221                goto xdr_error;
4222        if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4223                goto xdr_error;
4224        if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4225                goto xdr_error;
4226        if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4227                goto xdr_error;
4228        status = verify_attr_len(xdr, savep, attrlen);
4229xdr_error:
4230        dprintk("%s: xdr returned %d!\n", __func__, -status);
4231        return status;
4232}
4233
4234static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4235{
4236        unsigned int savep;
4237        uint32_t attrlen, bitmap[3] = {0};
4238        int status;
4239
4240        if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4241                goto xdr_error;
4242        if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4243                goto xdr_error;
4244        if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4245                goto xdr_error;
4246
4247        if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4248                goto xdr_error;
4249        if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4250                goto xdr_error;
4251        if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4252                goto xdr_error;
4253        if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4254                goto xdr_error;
4255        if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4256                goto xdr_error;
4257        if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4258                goto xdr_error;
4259
4260        status = verify_attr_len(xdr, savep, attrlen);
4261xdr_error:
4262        dprintk("%s: xdr returned %d!\n", __func__, -status);
4263        return status;
4264}
4265
4266static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4267{
4268        unsigned int savep;
4269        uint32_t attrlen, bitmap[3] = {0};
4270        int status;
4271
4272        if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4273                goto xdr_error;
4274        if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4275                goto xdr_error;
4276        if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4277                goto xdr_error;
4278
4279        if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4280                goto xdr_error;
4281        if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4282                goto xdr_error;
4283
4284        status = verify_attr_len(xdr, savep, attrlen);
4285xdr_error:
4286        dprintk("%s: xdr returned %d!\n", __func__, -status);
4287        return status;
4288}
4289
4290static int decode_threshold_hint(struct xdr_stream *xdr,
4291                                  uint32_t *bitmap,
4292                                  uint64_t *res,
4293                                  uint32_t hint_bit)
4294{
4295        __be32 *p;
4296
4297        *res = 0;
4298        if (likely(bitmap[0] & hint_bit)) {
4299                p = xdr_inline_decode(xdr, 8);
4300                if (unlikely(!p))
4301                        goto out_overflow;
4302                xdr_decode_hyper(p, res);
4303        }
4304        return 0;
4305out_overflow:
4306        print_overflow_msg(__func__, xdr);
4307        return -EIO;
4308}
4309
4310static int decode_first_threshold_item4(struct xdr_stream *xdr,
4311                                        struct nfs4_threshold *res)
4312{
4313        __be32 *p;
4314        unsigned int savep;
4315        uint32_t bitmap[3] = {0,}, attrlen;
4316        int status;
4317
4318        /* layout type */
4319        p = xdr_inline_decode(xdr, 4);
4320        if (unlikely(!p)) {
4321                print_overflow_msg(__func__, xdr);
4322                return -EIO;
4323        }
4324        res->l_type = be32_to_cpup(p);
4325
4326        /* thi_hintset bitmap */
4327        status = decode_attr_bitmap(xdr, bitmap);
4328        if (status < 0)
4329                goto xdr_error;
4330
4331        /* thi_hintlist length */
4332        status = decode_attr_length(xdr, &attrlen, &savep);
4333        if (status < 0)
4334                goto xdr_error;
4335        /* thi_hintlist */
4336        status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4337        if (status < 0)
4338                goto xdr_error;
4339        status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4340        if (status < 0)
4341                goto xdr_error;
4342        status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4343                                       THRESHOLD_RD_IO);
4344        if (status < 0)
4345                goto xdr_error;
4346        status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4347                                       THRESHOLD_WR_IO);
4348        if (status < 0)
4349                goto xdr_error;
4350
4351        status = verify_attr_len(xdr, savep, attrlen);
4352        res->bm = bitmap[0];
4353
4354        dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4355                 __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4356                res->wr_io_sz);
4357xdr_error:
4358        dprintk("%s ret=%d!\n", __func__, status);
4359        return status;
4360}
4361
4362/*
4363 * Thresholds on pNFS direct I/O vrs MDS I/O
4364 */
4365static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4366                                    uint32_t *bitmap,
4367                                    struct nfs4_threshold *res)
4368{
4369        __be32 *p;
4370        int status = 0;
4371        uint32_t num;
4372
4373        if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4374                return -EIO;
4375        if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4376                /* Did the server return an unrequested attribute? */
4377                if (unlikely(res == NULL))
4378                        return -EREMOTEIO;
4379                p = xdr_inline_decode(xdr, 4);
4380                if (unlikely(!p))
4381                        goto out_overflow;
4382                num = be32_to_cpup(p);
4383                if (num == 0)
4384                        return 0;
4385                if (num > 1)
4386                        printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4387                                "drivers per filesystem not supported\n",
4388                                __func__);
4389
4390                status = decode_first_threshold_item4(xdr, res);
4391                bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4392        }
4393        return status;
4394out_overflow:
4395        print_overflow_msg(__func__, xdr);
4396        return -EIO;
4397}
4398
4399static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4400                struct nfs_fattr *fattr, struct nfs_fh *fh,
4401                struct nfs4_fs_locations *fs_loc,
4402                const struct nfs_server *server)
4403{
4404        int status;
4405        umode_t fmode = 0;
4406        uint32_t type;
4407        int32_t err;
4408
4409        status = decode_attr_type(xdr, bitmap, &type);
4410        if (status < 0)
4411                goto xdr_error;
4412        fattr->mode = 0;
4413        if (status != 0) {
4414                fattr->mode |= nfs_type2fmt[type];
4415                fattr->valid |= status;
4416        }
4417
4418        status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4419        if (status < 0)
4420                goto xdr_error;
4421        fattr->valid |= status;
4422
4423        status = decode_attr_size(xdr, bitmap, &fattr->size);
4424        if (status < 0)
4425                goto xdr_error;
4426        fattr->valid |= status;
4427
4428        status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4429        if (status < 0)
4430                goto xdr_error;
4431        fattr->valid |= status;
4432
4433        err = 0;
4434        status = decode_attr_error(xdr, bitmap, &err);
4435        if (status < 0)
4436                goto xdr_error;
4437
4438        status = decode_attr_filehandle(xdr, bitmap, fh);
4439        if (status < 0)
4440                goto xdr_error;
4441
4442        status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4443        if (status < 0)
4444                goto xdr_error;
4445        fattr->valid |= status;
4446
4447        status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4448        if (status < 0)
4449                goto xdr_error;
4450        fattr->valid |= status;
4451
4452        status = decode_attr_mode(xdr, bitmap, &fmode);
4453        if (status < 0)
4454                goto xdr_error;
4455        if (status != 0) {
4456                fattr->mode |= fmode;
4457                fattr->valid |= status;
4458        }
4459
4460        status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4461        if (status < 0)
4462                goto xdr_error;
4463        fattr->valid |= status;
4464
4465        status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4466        if (status < 0)
4467                goto xdr_error;
4468        fattr->valid |= status;
4469
4470        status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4471        if (status < 0)
4472                goto xdr_error;
4473        fattr->valid |= status;
4474
4475        status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4476        if (status < 0)
4477                goto xdr_error;
4478        fattr->valid |= status;
4479
4480        status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4481        if (status < 0)
4482                goto xdr_error;
4483        fattr->valid |= status;
4484
4485        status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4486        if (status < 0)
4487                goto xdr_error;
4488        fattr->valid |= status;
4489
4490        status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4491        if (status < 0)
4492                goto xdr_error;
4493        fattr->valid |= status;
4494
4495        status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4496        if (status < 0)
4497                goto xdr_error;
4498        fattr->valid |= status;
4499
4500        status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4501        if (status < 0)
4502                goto xdr_error;
4503        fattr->valid |= status;
4504
4505        status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4506        if (status < 0)
4507                goto xdr_error;
4508
4509xdr_error:
4510        dprintk("%s: xdr returned %d\n", __func__, -status);
4511        return status;
4512}
4513
4514static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4515                struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4516                const struct nfs_server *server)
4517{
4518        unsigned int savep;
4519        uint32_t attrlen,
4520                 bitmap[3] = {0};
4521        int status;
4522
4523        status = decode_op_hdr(xdr, OP_GETATTR);
4524        if (status < 0)
4525                goto xdr_error;
4526
4527        status = decode_attr_bitmap(xdr, bitmap);
4528        if (status < 0)
4529                goto xdr_error;
4530
4531        status = decode_attr_length(xdr, &attrlen, &savep);
4532        if (status < 0)
4533                goto xdr_error;
4534
4535        status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc, server);
4536        if (status < 0)
4537                goto xdr_error;
4538
4539        status = verify_attr_len(xdr, savep, attrlen);
4540xdr_error:
4541        dprintk("%s: xdr returned %d\n", __func__, -status);
4542        return status;
4543}
4544
4545static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4546                const struct nfs_server *server)
4547{
4548        return decode_getfattr_generic(xdr, fattr, NULL, NULL, server);
4549}
4550
4551/*
4552 * Decode potentially multiple layout types. Currently we only support
4553 * one layout driver per file system.
4554 */
4555static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4556                                         uint32_t *layouttype)
4557{
4558        uint32_t *p;
4559        int num;
4560
4561        p = xdr_inline_decode(xdr, 4);
4562        if (unlikely(!p))
4563                goto out_overflow;
4564        num = be32_to_cpup(p);
4565
4566        /* pNFS is not supported by the underlying file system */
4567        if (num == 0) {
4568                *layouttype = 0;
4569                return 0;
4570        }
4571        if (num > 1)
4572                printk(KERN_INFO "NFS: %s: Warning: Multiple pNFS layout "
4573                        "drivers per filesystem not supported\n", __func__);
4574
4575        /* Decode and set first layout type, move xdr->p past unused types */
4576        p = xdr_inline_decode(xdr, num * 4);
4577        if (unlikely(!p))
4578                goto out_overflow;
4579        *layouttype = be32_to_cpup(p);
4580        return 0;
4581out_overflow:
4582        print_overflow_msg(__func__, xdr);
4583        return -EIO;
4584}
4585
4586/*
4587 * The type of file system exported.
4588 * Note we must ensure that layouttype is set in any non-error case.
4589 */
4590static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4591                                uint32_t *layouttype)
4592{
4593        int status = 0;
4594
4595        dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4596        if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4597                return -EIO;
4598        if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4599                status = decode_first_pnfs_layout_type(xdr, layouttype);
4600                bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4601        } else
4602                *layouttype = 0;
4603        return status;
4604}
4605
4606/*
4607 * The prefered block size for layout directed io
4608 */
4609static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4610                                      uint32_t *res)
4611{
4612        __be32 *p;
4613
4614        dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4615        *res = 0;
4616        if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4617                p = xdr_inline_decode(xdr, 4);
4618                if (unlikely(!p)) {
4619                        print_overflow_msg(__func__, xdr);
4620                        return -EIO;
4621                }
4622                *res = be32_to_cpup(p);
4623                bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4624        }
4625        return 0;
4626}
4627
4628static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4629{
4630        unsigned int savep;
4631        uint32_t attrlen, bitmap[3];
4632        int status;
4633
4634        if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4635                goto xdr_error;
4636        if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4637                goto xdr_error;
4638        if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4639                goto xdr_error;
4640
4641        fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4642
4643        if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4644                goto xdr_error;
4645        if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4646                goto xdr_error;
4647        if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4648                goto xdr_error;
4649        fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4650        if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4651                goto xdr_error;
4652        fsinfo->wtpref = fsinfo->wtmax;
4653        status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4654        if (status != 0)
4655                goto xdr_error;
4656        status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4657        if (status != 0)
4658                goto xdr_error;
4659        status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4660        if (status)
4661                goto xdr_error;
4662
4663        status = verify_attr_len(xdr, savep, attrlen);
4664xdr_error:
4665        dprintk("%s: xdr returned %d!\n", __func__, -status);
4666        return status;
4667}
4668
4669static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4670{
4671        __be32 *p;
4672        uint32_t len;
4673        int status;
4674
4675        /* Zero handle first to allow comparisons */
4676        memset(fh, 0, sizeof(*fh));
4677
4678        status = decode_op_hdr(xdr, OP_GETFH);
4679        if (status)
4680                return status;
4681
4682        p = xdr_inline_decode(xdr, 4);
4683        if (unlikely(!p))
4684                goto out_overflow;
4685        len = be32_to_cpup(p);
4686        if (len > NFS4_FHSIZE)
4687                return -EIO;
4688        fh->size = len;
4689        p = xdr_inline_decode(xdr, len);
4690        if (unlikely(!p))
4691                goto out_overflow;
4692        memcpy(fh->data, p, len);
4693        return 0;
4694out_overflow:
4695        print_overflow_msg(__func__, xdr);
4696        return -EIO;
4697}
4698
4699static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4700{
4701        int status;
4702
4703        status = decode_op_hdr(xdr, OP_LINK);
4704        if (status)
4705                return status;
4706        return decode_change_info(xdr, cinfo);
4707}
4708
4709/*
4710 * We create the owner, so we know a proper owner.id length is 4.
4711 */
4712static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4713{
4714        uint64_t offset, length, clientid;
4715        __be32 *p;
4716        uint32_t namelen, type;
4717
4718        p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4719        if (unlikely(!p))
4720                goto out_overflow;
4721        p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4722        p = xdr_decode_hyper(p, &length);
4723        type = be32_to_cpup(p++); /* 4 byte read */
4724        if (fl != NULL) { /* manipulate file lock */
4725                fl->fl_start = (loff_t)offset;
4726                fl->fl_end = fl->fl_start + (loff_t)length - 1;
4727                if (length == ~(uint64_t)0)
4728                        fl->fl_end = OFFSET_MAX;
4729                fl->fl_type = F_WRLCK;
4730                if (type & 1)
4731                        fl->fl_type = F_RDLCK;
4732                fl->fl_pid = 0;
4733        }
4734        p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4735        namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4736        p = xdr_inline_decode(xdr, namelen); /* variable size field */
4737        if (likely(p))
4738                return -NFS4ERR_DENIED;
4739out_overflow:
4740        print_overflow_msg(__func__, xdr);
4741        return -EIO;
4742}
4743
4744static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4745{
4746        int status;
4747
4748        status = decode_op_hdr(xdr, OP_LOCK);
4749        if (status == -EIO)
4750                goto out;
4751        if (status == 0) {
4752                status = decode_stateid(xdr, &res->stateid);
4753                if (unlikely(status))
4754                        goto out;
4755        } else if (status == -NFS4ERR_DENIED)
4756                status = decode_lock_denied(xdr, NULL);
4757        if (res->open_seqid != NULL)
4758                nfs_increment_open_seqid(status, res->open_seqid);
4759        nfs_increment_lock_seqid(status, res->lock_seqid);
4760out:
4761        return status;
4762}
4763
4764static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4765{
4766        int status;
4767        status = decode_op_hdr(xdr, OP_LOCKT);
4768        if (status == -NFS4ERR_DENIED)
4769                return decode_lock_denied(xdr, res->denied);
4770        return status;
4771}
4772
4773static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4774{
4775        int status;
4776
4777        status = decode_op_hdr(xdr, OP_LOCKU);
4778        if (status != -EIO)
4779                nfs_increment_lock_seqid(status, res->seqid);
4780        if (status == 0)
4781                status = decode_stateid(xdr, &res->stateid);
4782        return status;
4783}
4784
4785static int decode_release_lockowner(struct xdr_stream *xdr)
4786{
4787        return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4788}
4789
4790static int decode_lookup(struct xdr_stream *xdr)
4791{
4792        return decode_op_hdr(xdr, OP_LOOKUP);
4793}
4794
4795/* This is too sick! */
4796static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4797{
4798        __be32 *p;
4799        uint32_t limit_type, nblocks, blocksize;
4800
4801        p = xdr_inline_decode(xdr, 12);
4802        if (unlikely(!p))
4803                goto out_overflow;
4804        limit_type = be32_to_cpup(p++);
4805        switch (limit_type) {
4806        case 1:
4807                xdr_decode_hyper(p, maxsize);
4808                break;
4809        case 2:
4810                nblocks = be32_to_cpup(p++);
4811                blocksize = be32_to_cpup(p);
4812                *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4813        }
4814        return 0;
4815out_overflow:
4816        print_overflow_msg(__func__, xdr);
4817        return -EIO;
4818}
4819
4820static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4821{
4822        __be32 *p;
4823        uint32_t delegation_type;
4824        int status;
4825
4826        p = xdr_inline_decode(xdr, 4);
4827        if (unlikely(!p))
4828                goto out_overflow;
4829        delegation_type = be32_to_cpup(p);
4830        if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4831                res->delegation_type = 0;
4832                return 0;
4833        }
4834        status = decode_stateid(xdr, &res->delegation);
4835        if (unlikely(status))
4836                return status;
4837        p = xdr_inline_decode(xdr, 4);
4838        if (unlikely(!p))
4839                goto out_overflow;
4840        res->do_recall = be32_to_cpup(p);
4841
4842        switch (delegation_type) {
4843        case NFS4_OPEN_DELEGATE_READ:
4844                res->delegation_type = FMODE_READ;
4845                break;
4846        case NFS4_OPEN_DELEGATE_WRITE:
4847                res->delegation_type = FMODE_WRITE|FMODE_READ;
4848                if (decode_space_limit(xdr, &res->maxsize) < 0)
4849                                return -EIO;
4850        }
4851        return decode_ace(xdr, NULL, res->server->nfs_client);
4852out_overflow:
4853        print_overflow_msg(__func__, xdr);
4854        return -EIO;
4855}
4856
4857static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
4858{
4859        __be32 *p;
4860        uint32_t savewords, bmlen, i;
4861        int status;
4862
4863        status = decode_op_hdr(xdr, OP_OPEN);
4864        if (status != -EIO)
4865                nfs_increment_open_seqid(status, res->seqid);
4866        if (!status)
4867                status = decode_stateid(xdr, &res->stateid);
4868        if (unlikely(status))
4869                return status;
4870
4871        decode_change_info(xdr, &res->cinfo);
4872
4873        p = xdr_inline_decode(xdr, 8);
4874        if (unlikely(!p))
4875                goto out_overflow;
4876        res->rflags = be32_to_cpup(p++);
4877        bmlen = be32_to_cpup(p);
4878        if (bmlen > 10)
4879                goto xdr_error;
4880
4881        p = xdr_inline_decode(xdr, bmlen << 2);
4882        if (unlikely(!p))
4883                goto out_overflow;
4884        savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
4885        for (i = 0; i < savewords; ++i)
4886                res->attrset[i] = be32_to_cpup(p++);
4887        for (; i < NFS4_BITMAP_SIZE; i++)
4888                res->attrset[i] = 0;
4889
4890        return decode_delegation(xdr, res);
4891xdr_error:
4892        dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
4893        return -EIO;
4894out_overflow:
4895        print_overflow_msg(__func__, xdr);
4896        return -EIO;
4897}
4898
4899static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
4900{
4901        int status;
4902
4903        status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
4904        if (status != -EIO)
4905                nfs_increment_open_seqid(status, res->seqid);
4906        if (!status)
4907                status = decode_stateid(xdr, &res->stateid);
4908        return status;
4909}
4910
4911static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
4912{
4913        int status;
4914
4915        status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
4916        if (status != -EIO)
4917                nfs_increment_open_seqid(status, res->seqid);
4918        if (!status)
4919                status = decode_stateid(xdr, &res->stateid);
4920        return status;
4921}
4922
4923static int decode_putfh(struct xdr_stream *xdr)
4924{
4925        return decode_op_hdr(xdr, OP_PUTFH);
4926}
4927
4928static int decode_putrootfh(struct xdr_stream *xdr)
4929{
4930        return decode_op_hdr(xdr, OP_PUTROOTFH);
4931}
4932
4933static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
4934{
4935        __be32 *p;
4936        uint32_t count, eof, recvd;
4937        int status;
4938
4939        status = decode_op_hdr(xdr, OP_READ);
4940        if (status)
4941                return status;
4942        p = xdr_inline_decode(xdr, 8);
4943        if (unlikely(!p))
4944                goto out_overflow;
4945        eof = be32_to_cpup(p++);
4946        count = be32_to_cpup(p);
4947        recvd = xdr_read_pages(xdr, count);
4948        if (count > recvd) {
4949                dprintk("NFS: server cheating in read reply: "
4950                                "count %u > recvd %u\n", count, recvd);
4951                count = recvd;
4952                eof = 0;
4953        }
4954        res->eof = eof;
4955        res->count = count;
4956        return 0;
4957out_overflow:
4958        print_overflow_msg(__func__, xdr);
4959        return -EIO;
4960}
4961
4962static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
4963{
4964        int             status;
4965        __be32          verf[2];
4966
4967        status = decode_op_hdr(xdr, OP_READDIR);
4968        if (!status)
4969                status = decode_verifier(xdr, readdir->verifier.data);
4970        if (unlikely(status))
4971                return status;
4972        memcpy(verf, readdir->verifier.data, sizeof(verf));
4973        dprintk("%s: verifier = %08x:%08x\n",
4974                        __func__, verf[0], verf[1]);
4975        return xdr_read_pages(xdr, xdr->buf->page_len);
4976}
4977
4978static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
4979{
4980        struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4981        u32 len, recvd;
4982        __be32 *p;
4983        int status;
4984
4985        status = decode_op_hdr(xdr, OP_READLINK);
4986        if (status)
4987                return status;
4988
4989        /* Convert length of symlink */
4990        p = xdr_inline_decode(xdr, 4);
4991        if (unlikely(!p))
4992                goto out_overflow;
4993        len = be32_to_cpup(p);
4994        if (len >= rcvbuf->page_len || len <= 0) {
4995                dprintk("nfs: server returned giant symlink!\n");
4996                return -ENAMETOOLONG;
4997        }
4998        recvd = xdr_read_pages(xdr, len);
4999        if (recvd < len) {
5000                dprintk("NFS: server cheating in readlink reply: "
5001                                "count %u > recvd %u\n", len, recvd);
5002                return -EIO;
5003        }
5004        /*
5005         * The XDR encode routine has set things up so that
5006         * the link text will be copied directly into the
5007         * buffer.  We just have to do overflow-checking,
5008         * and and null-terminate the text (the VFS expects
5009         * null-termination).
5010         */
5011        xdr_