LXR linux/fs/nfs/nfs4xdr.c

   1/*
   2 *  fs/nfs/nfs4xdr.c
   3 *
   4 *  Client-side XDR for NFSv4.
   5 *
   6 *  Copyright (c) 2002 The Regents of the University of Michigan.
   7 *  All rights reserved.
   8 *
   9 *  Kendrick Smith <kmsmith@umich.edu>
  10 *  Andy Adamson   <andros@umich.edu>
  11 *
  12 *  Redistribution and use in source and binary forms, with or without
  13 *  modification, are permitted provided that the following conditions
  14 *  are met:
  15 *
  16 *  1. Redistributions of source code must retain the above copyright
  17 *     notice, this list of conditions and the following disclaimer.
  18 *  2. Redistributions in binary form must reproduce the above copyright
  19 *     notice, this list of conditions and the following disclaimer in the
  20 *     documentation and/or other materials provided with the distribution.
  21 *  3. Neither the name of the University nor the names of its
  22 *     contributors may be used to endorse or promote products derived
  23 *     from this software without specific prior written permission.
  24 *
  25 *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  26 *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  27 *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  28 *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  29 *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30 *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31 *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  32 *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  33 *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  34 *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  35 *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36 */
  37
  38#include <linux/param.h>
  39#include <linux/time.h>
  40#include <linux/mm.h>
  41#include <linux/errno.h>
  42#include <linux/string.h>
  43#include <linux/in.h>
  44#include <linux/pagemap.h>
  45#include <linux/proc_fs.h>
  46#include <linux/kdev_t.h>
  47#include <linux/module.h>
  48#include <linux/utsname.h>
  49#include <linux/sunrpc/clnt.h>
  50#include <linux/sunrpc/msg_prot.h>
  51#include <linux/sunrpc/gss_api.h>
  52#include <linux/nfs.h>
  53#include <linux/nfs4.h>
  54#include <linux/nfs_fs.h>
  55#include <linux/nfs_idmap.h>
  56
  57#include "nfs4_fs.h"
  58#include "internal.h"
  59#include "nfs4session.h"
  60#include "pnfs.h"
  61#include "netns.h"
  62
  63#define NFSDBG_FACILITY         NFSDBG_XDR
  64
  65/* Mapping from NFS error code to "errno" error code. */
  66#define errno_NFSERR_IO         EIO
  67
  68static int nfs4_stat_to_errno(int);
  69
  70/* NFSv4 COMPOUND tags are only wanted for debugging purposes */
  71#ifdef DEBUG
  72#define NFS4_MAXTAGLEN          20
  73#else
  74#define NFS4_MAXTAGLEN          0
  75#endif
  76
  77/* lock,open owner id:
  78 * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT  >> 2)
  79 */
  80#define open_owner_id_maxsz     (1 + 2 + 1 + 1 + 2)
  81#define lock_owner_id_maxsz     (1 + 1 + 4)
  82#define decode_lockowner_maxsz  (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  83#define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  84#define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  85#define op_encode_hdr_maxsz     (1)
  86#define op_decode_hdr_maxsz     (2)
  87#define encode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  88#define decode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  89#define encode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  90#define decode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  91#define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
  92                                (NFS4_FHSIZE >> 2))
  93#define decode_putfh_maxsz      (op_decode_hdr_maxsz)
  94#define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
  95#define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
  96#define encode_getfh_maxsz      (op_encode_hdr_maxsz)
  97#define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
  98                                ((3+NFS4_FHSIZE) >> 2))
  99#define nfs4_fattr_bitmap_maxsz 4
 100#define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
 101#define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
 102#define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
 103#define nfs4_owner_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 104#define nfs4_group_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 105#ifdef CONFIG_NFS_V4_SECURITY_LABEL
 106/* PI(4 bytes) + LFS(4 bytes) + 1(for null terminator?) + MAXLABELLEN */
 107#define nfs4_label_maxsz        (4 + 4 + 1 + XDR_QUADLEN(NFS4_MAXLABELLEN))
 108#define encode_readdir_space 24
 109#define encode_readdir_bitmask_sz 3
 110#else
 111#define nfs4_label_maxsz        0
 112#define encode_readdir_space 20
 113#define encode_readdir_bitmask_sz 2
 114#endif
 115/* We support only one layout type per file system */
 116#define decode_mdsthreshold_maxsz (1 + 1 + nfs4_fattr_bitmap_maxsz + 1 + 8)
 117/* This is based on getfattr, which uses the most attributes: */
 118#define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
 119                                3 + 3 + 3 + nfs4_owner_maxsz + \
 120                                nfs4_group_maxsz + nfs4_label_maxsz + \
 121                                 decode_mdsthreshold_maxsz))
 122#define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
 123                                nfs4_fattr_value_maxsz)
 124#define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
 125#define encode_attrs_maxsz      (nfs4_fattr_bitmap_maxsz + \
 126                                 1 + 2 + 1 + \
 127                                nfs4_owner_maxsz + \
 128                                nfs4_group_maxsz + \
 129                                nfs4_label_maxsz + \
 130                                4 + 4)
 131#define encode_savefh_maxsz     (op_encode_hdr_maxsz)
 132#define decode_savefh_maxsz     (op_decode_hdr_maxsz)
 133#define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
 134#define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 135#define encode_fsinfo_maxsz     (encode_getattr_maxsz)
 136/* The 5 accounts for the PNFS attributes, and assumes that at most three
 137 * layout types will be returned.
 138 */
 139#define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + \
 140                                 nfs4_fattr_bitmap_maxsz + 4 + 8 + 5)
 141#define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 142#define decode_renew_maxsz      (op_decode_hdr_maxsz)
 143#define encode_setclientid_maxsz \
 144                                (op_encode_hdr_maxsz + \
 145                                XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 146                                XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
 147                                1 /* sc_prog */ + \
 148                                XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 149                                XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
 150                                1) /* sc_cb_ident */
 151#define decode_setclientid_maxsz \
 152                                (op_decode_hdr_maxsz + \
 153                                2 + \
 154                                1024) /* large value for CLID_INUSE */
 155#define encode_setclientid_confirm_maxsz \
 156                                (op_encode_hdr_maxsz + \
 157                                3 + (NFS4_VERIFIER_SIZE >> 2))
 158#define decode_setclientid_confirm_maxsz \
 159                                (op_decode_hdr_maxsz)
 160#define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
 161#define decode_lookup_maxsz     (op_decode_hdr_maxsz)
 162#define encode_share_access_maxsz \
 163                                (2)
 164#define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
 165#define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
 166#define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
 167#define encode_open_maxsz       (op_encode_hdr_maxsz + \
 168                                2 + encode_share_access_maxsz + 2 + \
 169                                open_owner_id_maxsz + \
 170                                encode_opentype_maxsz + \
 171                                encode_claim_null_maxsz)
 172#define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
 173#define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
 174                                decode_ace_maxsz)
 175#define decode_change_info_maxsz        (5)
 176#define decode_open_maxsz       (op_decode_hdr_maxsz + \
 177                                decode_stateid_maxsz + \
 178                                decode_change_info_maxsz + 1 + \
 179                                nfs4_fattr_bitmap_maxsz + \
 180                                decode_delegation_maxsz)
 181#define encode_open_confirm_maxsz \
 182                                (op_encode_hdr_maxsz + \
 183                                 encode_stateid_maxsz + 1)
 184#define decode_open_confirm_maxsz \
 185                                (op_decode_hdr_maxsz + \
 186                                 decode_stateid_maxsz)
 187#define encode_open_downgrade_maxsz \
 188                                (op_encode_hdr_maxsz + \
 189                                 encode_stateid_maxsz + 1 + \
 190                                 encode_share_access_maxsz)
 191#define decode_open_downgrade_maxsz \
 192                                (op_decode_hdr_maxsz + \
 193                                 decode_stateid_maxsz)
 194#define encode_close_maxsz      (op_encode_hdr_maxsz + \
 195                                 1 + encode_stateid_maxsz)
 196#define decode_close_maxsz      (op_decode_hdr_maxsz + \
 197                                 decode_stateid_maxsz)
 198#define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
 199                                 encode_stateid_maxsz + \
 200                                 encode_attrs_maxsz)
 201#define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
 202                                 nfs4_fattr_bitmap_maxsz)
 203#define encode_read_maxsz       (op_encode_hdr_maxsz + \
 204                                 encode_stateid_maxsz + 3)
 205#define decode_read_maxsz       (op_decode_hdr_maxsz + 2)
 206#define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
 207                                 2 + encode_verifier_maxsz + 5 + \
 208                                nfs4_label_maxsz)
 209#define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
 210                                 decode_verifier_maxsz + \
 211                                nfs4_label_maxsz + nfs4_fattr_maxsz)
 212#define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 213#define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1)
 214#define encode_write_maxsz      (op_encode_hdr_maxsz + \
 215                                 encode_stateid_maxsz + 4)
 216#define decode_write_maxsz      (op_decode_hdr_maxsz + \
 217                                 2 + decode_verifier_maxsz)
 218#define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
 219#define decode_commit_maxsz     (op_decode_hdr_maxsz + \
 220                                 decode_verifier_maxsz)
 221#define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 222                                nfs4_name_maxsz)
 223#define decode_remove_maxsz     (op_decode_hdr_maxsz + \
 224                                 decode_change_info_maxsz)
 225#define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 226                                2 * nfs4_name_maxsz)
 227#define decode_rename_maxsz     (op_decode_hdr_maxsz + \
 228                                 decode_change_info_maxsz + \
 229                                 decode_change_info_maxsz)
 230#define encode_link_maxsz       (op_encode_hdr_maxsz + \
 231                                nfs4_name_maxsz)
 232#define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
 233#define encode_lockowner_maxsz  (7)
 234#define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 235                                 7 + \
 236                                 1 + encode_stateid_maxsz + 1 + \
 237                                 encode_lockowner_maxsz)
 238#define decode_lock_denied_maxsz \
 239                                (8 + decode_lockowner_maxsz)
 240#define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 241                                 decode_lock_denied_maxsz)
 242#define encode_lockt_maxsz      (op_encode_hdr_maxsz + 5 + \
 243                                encode_lockowner_maxsz)
 244#define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 245                                 decode_lock_denied_maxsz)
 246#define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 247                                 encode_stateid_maxsz + \
 248                                 4)
 249#define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 250                                 decode_stateid_maxsz)
 251#define encode_release_lockowner_maxsz \
 252                                (op_encode_hdr_maxsz + \
 253                                 encode_lockowner_maxsz)
 254#define decode_release_lockowner_maxsz \
 255                                (op_decode_hdr_maxsz)
 256#define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 257#define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 258#define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 259                                1 + nfs4_name_maxsz + \
 260                                1 + \
 261                                nfs4_fattr_maxsz)
 262#define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 263#define encode_create_maxsz     (op_encode_hdr_maxsz + \
 264                                1 + 2 + nfs4_name_maxsz + \
 265                                encode_attrs_maxsz)
 266#define decode_create_maxsz     (op_decode_hdr_maxsz + \
 267                                decode_change_info_maxsz + \
 268                                nfs4_fattr_bitmap_maxsz)
 269#define encode_statfs_maxsz     (encode_getattr_maxsz)
 270#define decode_statfs_maxsz     (decode_getattr_maxsz)
 271#define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 272#define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 273#define encode_getacl_maxsz     (encode_getattr_maxsz)
 274#define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 275                                 nfs4_fattr_bitmap_maxsz + 1)
 276#define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 277                                 encode_stateid_maxsz + 3)
 278#define decode_setacl_maxsz     (decode_setattr_maxsz)
 279#define encode_fs_locations_maxsz \
 280                                (encode_getattr_maxsz)
 281#define decode_fs_locations_maxsz \
 282                                (0)
 283#define encode_secinfo_maxsz    (op_encode_hdr_maxsz + nfs4_name_maxsz)
 284#define decode_secinfo_maxsz    (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
 285
 286#if defined(CONFIG_NFS_V4_1)
 287#define NFS4_MAX_MACHINE_NAME_LEN (64)
 288#define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \
 289                         sizeof(utsname()->version) + sizeof(utsname()->machine) + 8)
 290
 291#define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
 292                                encode_verifier_maxsz + \
 293                                1 /* co_ownerid.len */ + \
 294                                XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
 295                                1 /* flags */ + \
 296                                1 /* spa_how */ + \
 297                                /* max is SP4_MACH_CRED (for now) */ + \
 298                                1 + NFS4_OP_MAP_NUM_WORDS + \
 299                                1 + NFS4_OP_MAP_NUM_WORDS + \
 300                                1 /* implementation id array of size 1 */ + \
 301                                1 /* nii_domain */ + \
 302                                XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 303                                1 /* nii_name */ + \
 304                                XDR_QUADLEN(IMPL_NAME_LIMIT) + \
 305                                3 /* nii_date */)
 306#define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
 307                                2 /* eir_clientid */ + \
 308                                1 /* eir_sequenceid */ + \
 309                                1 /* eir_flags */ + \
 310                                1 /* spr_how */ + \
 311                                  /* max is SP4_MACH_CRED (for now) */ + \
 312                                1 + NFS4_OP_MAP_NUM_WORDS + \
 313                                1 + NFS4_OP_MAP_NUM_WORDS + \
 314                                2 /* eir_server_owner.so_minor_id */ + \
 315                                /* eir_server_owner.so_major_id<> */ \
 316                                XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 317                                /* eir_server_scope<> */ \
 318                                XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 319                                1 /* eir_server_impl_id array length */ + \
 320                                1 /* nii_domain */ + \
 321                                XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 322                                1 /* nii_name */ + \
 323                                XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 324                                3 /* nii_date */)
 325#define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
 326#define decode_channel_attrs_maxsz  (6 + \
 327                                     1 /* ca_rdma_ird.len */ + \
 328                                     1 /* ca_rdma_ird */)
 329#define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
 330                                     2 /* csa_clientid */ + \
 331                                     1 /* csa_sequence */ + \
 332                                     1 /* csa_flags */ + \
 333                                     encode_channel_attrs_maxsz + \
 334                                     encode_channel_attrs_maxsz + \
 335                                     1 /* csa_cb_program */ + \
 336                                     1 /* csa_sec_parms.len (1) */ + \
 337                                     1 /* cb_secflavor (AUTH_SYS) */ + \
 338                                     1 /* stamp */ + \
 339                                     1 /* machinename.len */ + \
 340                                     XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
 341                                     1 /* uid */ + \
 342                                     1 /* gid */ + \
 343                                     1 /* gids.len (0) */)
 344#define decode_create_session_maxsz  (op_decode_hdr_maxsz +     \
 345                                     XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 346                                     1 /* csr_sequence */ + \
 347                                     1 /* csr_flags */ + \
 348                                     decode_channel_attrs_maxsz + \
 349                                     decode_channel_attrs_maxsz)
 350#define encode_bind_conn_to_session_maxsz  (op_encode_hdr_maxsz + \
 351                                     /* bctsa_sessid */ \
 352                                     XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 353                                     1 /* bctsa_dir */ + \
 354                                     1 /* bctsa_use_conn_in_rdma_mode */)
 355#define decode_bind_conn_to_session_maxsz  (op_decode_hdr_maxsz +       \
 356                                     /* bctsr_sessid */ \
 357                                     XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 358                                     1 /* bctsr_dir */ + \
 359                                     1 /* bctsr_use_conn_in_rdma_mode */)
 360#define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
 361#define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
 362#define encode_destroy_clientid_maxsz   (op_encode_hdr_maxsz + 2)
 363#define decode_destroy_clientid_maxsz   (op_decode_hdr_maxsz)
 364#define encode_sequence_maxsz   (op_encode_hdr_maxsz + \
 365                                XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
 366#define decode_sequence_maxsz   (op_decode_hdr_maxsz + \
 367                                XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
 368#define encode_reclaim_complete_maxsz   (op_encode_hdr_maxsz + 4)
 369#define decode_reclaim_complete_maxsz   (op_decode_hdr_maxsz + 4)
 370#define encode_getdevicelist_maxsz (op_encode_hdr_maxsz + 4 + \
 371                                encode_verifier_maxsz)
 372#define decode_getdevicelist_maxsz (op_decode_hdr_maxsz + \
 373                                2 /* nfs_cookie4 gdlr_cookie */ + \
 374                                decode_verifier_maxsz \
 375                                  /* verifier4 gdlr_verifier */ + \
 376                                1 /* gdlr_deviceid_list count */ + \
 377                                XDR_QUADLEN(NFS4_PNFS_GETDEVLIST_MAXNUM * \
 378                                            NFS4_DEVICEID4_SIZE) \
 379                                  /* gdlr_deviceid_list */ + \
 380                                1 /* bool gdlr_eof */)
 381#define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + 4 + \
 382                                XDR_QUADLEN(NFS4_DEVICEID4_SIZE))
 383#define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
 384                                1 /* layout type */ + \
 385                                1 /* opaque devaddr4 length */ + \
 386                                  /* devaddr4 payload is read into page */ \
 387                                1 /* notification bitmap length */ + \
 388                                1 /* notification bitmap */)
 389#define encode_layoutget_maxsz  (op_encode_hdr_maxsz + 10 + \
 390                                encode_stateid_maxsz)
 391#define decode_layoutget_maxsz  (op_decode_hdr_maxsz + 8 + \
 392                                decode_stateid_maxsz + \
 393                                XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
 394#define encode_layoutcommit_maxsz (op_encode_hdr_maxsz +          \
 395                                2 /* offset */ + \
 396                                2 /* length */ + \
 397                                1 /* reclaim */ + \
 398                                encode_stateid_maxsz + \
 399                                1 /* new offset (true) */ + \
 400                                2 /* last byte written */ + \
 401                                1 /* nt_timechanged (false) */ + \
 402                                1 /* layoutupdate4 layout type */ + \
 403                                1 /* NULL filelayout layoutupdate4 payload */)
 404#define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
 405#define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
 406                                encode_stateid_maxsz + \
 407                                1 /* FIXME: opaque lrf_body always empty at the moment */)
 408#define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
 409                                1 + decode_stateid_maxsz)
 410#define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
 411#define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
 412#define encode_test_stateid_maxsz       (op_encode_hdr_maxsz + 2 + \
 413                                         XDR_QUADLEN(NFS4_STATEID_SIZE))
 414#define decode_test_stateid_maxsz       (op_decode_hdr_maxsz + 2 + 1)
 415#define encode_free_stateid_maxsz       (op_encode_hdr_maxsz + 1 + \
 416                                         XDR_QUADLEN(NFS4_STATEID_SIZE))
 417#define decode_free_stateid_maxsz       (op_decode_hdr_maxsz)
 418#else /* CONFIG_NFS_V4_1 */
 419#define encode_sequence_maxsz   0
 420#define decode_sequence_maxsz   0
 421#endif /* CONFIG_NFS_V4_1 */
 422
 423#define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 424#define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 425#define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 426                                encode_sequence_maxsz + \
 427                                encode_putfh_maxsz + \
 428                                encode_read_maxsz)
 429#define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 430                                decode_sequence_maxsz + \
 431                                decode_putfh_maxsz + \
 432                                decode_read_maxsz)
 433#define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 434                                encode_sequence_maxsz + \
 435                                encode_putfh_maxsz + \
 436                                encode_readlink_maxsz)
 437#define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 438                                decode_sequence_maxsz + \
 439                                decode_putfh_maxsz + \
 440                                decode_readlink_maxsz)
 441#define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 442                                encode_sequence_maxsz + \
 443                                encode_putfh_maxsz + \
 444                                encode_readdir_maxsz)
 445#define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 446                                decode_sequence_maxsz + \
 447                                decode_putfh_maxsz + \
 448                                decode_readdir_maxsz)
 449#define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 450                                encode_sequence_maxsz + \
 451                                encode_putfh_maxsz + \
 452                                encode_write_maxsz + \
 453                                encode_getattr_maxsz)
 454#define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 455                                decode_sequence_maxsz + \
 456                                decode_putfh_maxsz + \
 457                                decode_write_maxsz + \
 458                                decode_getattr_maxsz)
 459#define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 460                                encode_sequence_maxsz + \
 461                                encode_putfh_maxsz + \
 462                                encode_commit_maxsz)
 463#define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 464                                decode_sequence_maxsz + \
 465                                decode_putfh_maxsz + \
 466                                decode_commit_maxsz)
 467#define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 468                                encode_sequence_maxsz + \
 469                                encode_putfh_maxsz + \
 470                                encode_open_maxsz + \
 471                                encode_access_maxsz + \
 472                                encode_getfh_maxsz + \
 473                                encode_getattr_maxsz)
 474#define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 475                                decode_sequence_maxsz + \
 476                                decode_putfh_maxsz + \
 477                                decode_open_maxsz + \
 478                                decode_access_maxsz + \
 479                                decode_getfh_maxsz + \
 480                                decode_getattr_maxsz)
 481#define NFS4_enc_open_confirm_sz \
 482                                (compound_encode_hdr_maxsz + \
 483                                 encode_putfh_maxsz + \
 484                                 encode_open_confirm_maxsz)
 485#define NFS4_dec_open_confirm_sz \
 486                                (compound_decode_hdr_maxsz + \
 487                                 decode_putfh_maxsz + \
 488                                 decode_open_confirm_maxsz)
 489#define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 490                                        encode_sequence_maxsz + \
 491                                        encode_putfh_maxsz + \
 492                                        encode_open_maxsz + \
 493                                        encode_access_maxsz + \
 494                                        encode_getattr_maxsz)
 495#define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 496                                        decode_sequence_maxsz + \
 497                                        decode_putfh_maxsz + \
 498                                        decode_open_maxsz + \
 499                                        decode_access_maxsz + \
 500                                        decode_getattr_maxsz)
 501#define NFS4_enc_open_downgrade_sz \
 502                                (compound_encode_hdr_maxsz + \
 503                                 encode_sequence_maxsz + \
 504                                 encode_putfh_maxsz + \
 505                                 encode_open_downgrade_maxsz + \
 506                                 encode_getattr_maxsz)
 507#define NFS4_dec_open_downgrade_sz \
 508                                (compound_decode_hdr_maxsz + \
 509                                 decode_sequence_maxsz + \
 510                                 decode_putfh_maxsz + \
 511                                 decode_open_downgrade_maxsz + \
 512                                 decode_getattr_maxsz)
 513#define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 514                                 encode_sequence_maxsz + \
 515                                 encode_putfh_maxsz + \
 516                                 encode_close_maxsz + \
 517                                 encode_getattr_maxsz)
 518#define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 519                                 decode_sequence_maxsz + \
 520                                 decode_putfh_maxsz + \
 521                                 decode_close_maxsz + \
 522                                 decode_getattr_maxsz)
 523#define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 524                                 encode_sequence_maxsz + \
 525                                 encode_putfh_maxsz + \
 526                                 encode_setattr_maxsz + \
 527                                 encode_getattr_maxsz)
 528#define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 529                                 decode_sequence_maxsz + \
 530                                 decode_putfh_maxsz + \
 531                                 decode_setattr_maxsz + \
 532                                 decode_getattr_maxsz)
 533#define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 534                                encode_sequence_maxsz + \
 535                                encode_putfh_maxsz + \
 536                                encode_fsinfo_maxsz)
 537#define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 538                                decode_sequence_maxsz + \
 539                                decode_putfh_maxsz + \
 540                                decode_fsinfo_maxsz)
 541#define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 542                                encode_renew_maxsz)
 543#define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 544                                decode_renew_maxsz)
 545#define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 546                                encode_setclientid_maxsz)
 547#define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 548                                decode_setclientid_maxsz)
 549#define NFS4_enc_setclientid_confirm_sz \
 550                                (compound_encode_hdr_maxsz + \
 551                                encode_setclientid_confirm_maxsz)
 552#define NFS4_dec_setclientid_confirm_sz \
 553                                (compound_decode_hdr_maxsz + \
 554                                decode_setclientid_confirm_maxsz)
 555#define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 556                                encode_sequence_maxsz + \
 557                                encode_putfh_maxsz + \
 558                                encode_lock_maxsz)
 559#define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 560                                decode_sequence_maxsz + \
 561                                decode_putfh_maxsz + \
 562                                decode_lock_maxsz)
 563#define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 564                                encode_sequence_maxsz + \
 565                                encode_putfh_maxsz + \
 566                                encode_lockt_maxsz)
 567#define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 568                                 decode_sequence_maxsz + \
 569                                 decode_putfh_maxsz + \
 570                                 decode_lockt_maxsz)
 571#define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 572                                encode_sequence_maxsz + \
 573                                encode_putfh_maxsz + \
 574                                encode_locku_maxsz)
 575#define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 576                                decode_sequence_maxsz + \
 577                                decode_putfh_maxsz + \
 578                                decode_locku_maxsz)
 579#define NFS4_enc_release_lockowner_sz \
 580                                (compound_encode_hdr_maxsz + \
 581                                 encode_lockowner_maxsz)
 582#define NFS4_dec_release_lockowner_sz \
 583                                (compound_decode_hdr_maxsz + \
 584                                 decode_lockowner_maxsz)
 585#define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 586                                encode_sequence_maxsz + \
 587                                encode_putfh_maxsz + \
 588                                encode_access_maxsz + \
 589                                encode_getattr_maxsz)
 590#define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 591                                decode_sequence_maxsz + \
 592                                decode_putfh_maxsz + \
 593                                decode_access_maxsz + \
 594                                decode_getattr_maxsz)
 595#define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 596                                encode_sequence_maxsz + \
 597                                encode_putfh_maxsz + \
 598                                encode_getattr_maxsz)
 599#define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 600                                decode_sequence_maxsz + \
 601                                decode_putfh_maxsz + \
 602                                decode_getattr_maxsz)
 603#define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 604                                encode_sequence_maxsz + \
 605                                encode_putfh_maxsz + \
 606                                encode_lookup_maxsz + \
 607                                encode_getattr_maxsz + \
 608                                encode_getfh_maxsz)
 609#define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 610                                decode_sequence_maxsz + \
 611                                decode_putfh_maxsz + \
 612                                decode_lookup_maxsz + \
 613                                decode_getattr_maxsz + \
 614                                decode_getfh_maxsz)
 615#define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 616                                encode_sequence_maxsz + \
 617                                encode_putrootfh_maxsz + \
 618                                encode_getattr_maxsz + \
 619                                encode_getfh_maxsz)
 620#define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 621                                decode_sequence_maxsz + \
 622                                decode_putrootfh_maxsz + \
 623                                decode_getattr_maxsz + \
 624                                decode_getfh_maxsz)
 625#define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 626                                encode_sequence_maxsz + \
 627                                encode_putfh_maxsz + \
 628                                encode_remove_maxsz)
 629#define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 630                                decode_sequence_maxsz + \
 631                                decode_putfh_maxsz + \
 632                                decode_remove_maxsz)
 633#define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 634                                encode_sequence_maxsz + \
 635                                encode_putfh_maxsz + \
 636                                encode_savefh_maxsz + \
 637                                encode_putfh_maxsz + \
 638                                encode_rename_maxsz)
 639#define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 640                                decode_sequence_maxsz + \
 641                                decode_putfh_maxsz + \
 642                                decode_savefh_maxsz + \
 643                                decode_putfh_maxsz + \
 644                                decode_rename_maxsz)
 645#define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 646                                encode_sequence_maxsz + \
 647                                encode_putfh_maxsz + \
 648                                encode_savefh_maxsz + \
 649                                encode_putfh_maxsz + \
 650                                encode_link_maxsz + \
 651                                encode_restorefh_maxsz + \
 652                                encode_getattr_maxsz)
 653#define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 654                                decode_sequence_maxsz + \
 655                                decode_putfh_maxsz + \
 656                                decode_savefh_maxsz + \
 657                                decode_putfh_maxsz + \
 658                                decode_link_maxsz + \
 659                                decode_restorefh_maxsz + \
 660                                decode_getattr_maxsz)
 661#define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 662                                encode_sequence_maxsz + \
 663                                encode_putfh_maxsz + \
 664                                encode_symlink_maxsz + \
 665                                encode_getattr_maxsz + \
 666                                encode_getfh_maxsz)
 667#define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 668                                decode_sequence_maxsz + \
 669                                decode_putfh_maxsz + \
 670                                decode_symlink_maxsz + \
 671                                decode_getattr_maxsz + \
 672                                decode_getfh_maxsz)
 673#define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 674                                encode_sequence_maxsz + \
 675                                encode_putfh_maxsz + \
 676                                encode_create_maxsz + \
 677                                encode_getfh_maxsz + \
 678                                encode_getattr_maxsz)
 679#define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 680                                decode_sequence_maxsz + \
 681                                decode_putfh_maxsz + \
 682                                decode_create_maxsz + \
 683                                decode_getfh_maxsz + \
 684                                decode_getattr_maxsz)
 685#define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 686                                encode_sequence_maxsz + \
 687                                encode_putfh_maxsz + \
 688                                encode_getattr_maxsz)
 689#define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 690                                decode_sequence_maxsz + \
 691                                decode_putfh_maxsz + \
 692                                decode_getattr_maxsz)
 693#define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 694                                encode_sequence_maxsz + \
 695                                encode_putfh_maxsz + \
 696                                encode_statfs_maxsz)
 697#define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 698                                decode_sequence_maxsz + \
 699                                decode_putfh_maxsz + \
 700                                decode_statfs_maxsz)
 701#define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 702                                encode_sequence_maxsz + \
 703                                encode_putfh_maxsz + \
 704                                encode_getattr_maxsz)
 705#define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 706                                decode_sequence_maxsz + \
 707                                decode_putfh_maxsz + \
 708                                decode_getattr_maxsz)
 709#define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 710                                encode_sequence_maxsz + \
 711                                encode_putfh_maxsz + \
 712                                encode_delegreturn_maxsz + \
 713                                encode_getattr_maxsz)
 714#define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 715                                decode_sequence_maxsz + \
 716                                decode_delegreturn_maxsz + \
 717                                decode_getattr_maxsz)
 718#define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 719                                encode_sequence_maxsz + \
 720                                encode_putfh_maxsz + \
 721                                encode_getacl_maxsz)
 722#define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 723                                decode_sequence_maxsz + \
 724                                decode_putfh_maxsz + \
 725                                decode_getacl_maxsz)
 726#define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 727                                encode_sequence_maxsz + \
 728                                encode_putfh_maxsz + \
 729                                encode_setacl_maxsz)
 730#define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 731                                decode_sequence_maxsz + \
 732                                decode_putfh_maxsz + \
 733                                decode_setacl_maxsz)
 734#define NFS4_enc_fs_locations_sz \
 735                                (compound_encode_hdr_maxsz + \
 736                                 encode_sequence_maxsz + \
 737                                 encode_putfh_maxsz + \
 738                                 encode_lookup_maxsz + \
 739                                 encode_fs_locations_maxsz)
 740#define NFS4_dec_fs_locations_sz \
 741                                (compound_decode_hdr_maxsz + \
 742                                 decode_sequence_maxsz + \
 743                                 decode_putfh_maxsz + \
 744                                 decode_lookup_maxsz + \
 745                                 decode_fs_locations_maxsz)
 746#define NFS4_enc_secinfo_sz     (compound_encode_hdr_maxsz + \
 747                                encode_sequence_maxsz + \
 748                                encode_putfh_maxsz + \
 749                                encode_secinfo_maxsz)
 750#define NFS4_dec_secinfo_sz     (compound_decode_hdr_maxsz + \
 751                                decode_sequence_maxsz + \
 752                                decode_putfh_maxsz + \
 753                                decode_secinfo_maxsz)
 754#if defined(CONFIG_NFS_V4_1)
 755#define NFS4_enc_bind_conn_to_session_sz \
 756                                (compound_encode_hdr_maxsz + \
 757                                 encode_bind_conn_to_session_maxsz)
 758#define NFS4_dec_bind_conn_to_session_sz \
 759                                (compound_decode_hdr_maxsz + \
 760                                 decode_bind_conn_to_session_maxsz)
 761#define NFS4_enc_exchange_id_sz \
 762                                (compound_encode_hdr_maxsz + \
 763                                 encode_exchange_id_maxsz)
 764#define NFS4_dec_exchange_id_sz \
 765                                (compound_decode_hdr_maxsz + \
 766                                 decode_exchange_id_maxsz)
 767#define NFS4_enc_create_session_sz \
 768                                (compound_encode_hdr_maxsz + \
 769                                 encode_create_session_maxsz)
 770#define NFS4_dec_create_session_sz \
 771                                (compound_decode_hdr_maxsz + \
 772                                 decode_create_session_maxsz)
 773#define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
 774                                         encode_destroy_session_maxsz)
 775#define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
 776                                         decode_destroy_session_maxsz)
 777#define NFS4_enc_destroy_clientid_sz    (compound_encode_hdr_maxsz + \
 778                                         encode_destroy_clientid_maxsz)
 779#define NFS4_dec_destroy_clientid_sz    (compound_decode_hdr_maxsz + \
 780                                         decode_destroy_clientid_maxsz)
 781#define NFS4_enc_sequence_sz \
 782                                (compound_decode_hdr_maxsz + \
 783                                 encode_sequence_maxsz)
 784#define NFS4_dec_sequence_sz \
 785                                (compound_decode_hdr_maxsz + \
 786                                 decode_sequence_maxsz)
 787#define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
 788                                         encode_sequence_maxsz + \
 789                                         encode_putrootfh_maxsz + \
 790                                         encode_fsinfo_maxsz)
 791#define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
 792                                         decode_sequence_maxsz + \
 793                                         decode_putrootfh_maxsz + \
 794                                         decode_fsinfo_maxsz)
 795#define NFS4_enc_reclaim_complete_sz    (compound_encode_hdr_maxsz + \
 796                                         encode_sequence_maxsz + \
 797                                         encode_reclaim_complete_maxsz)
 798#define NFS4_dec_reclaim_complete_sz    (compound_decode_hdr_maxsz + \
 799                                         decode_sequence_maxsz + \
 800                                         decode_reclaim_complete_maxsz)
 801#define NFS4_enc_getdevicelist_sz (compound_encode_hdr_maxsz + \
 802                                encode_sequence_maxsz + \
 803                                encode_putfh_maxsz + \
 804                                encode_getdevicelist_maxsz)
 805#define NFS4_dec_getdevicelist_sz (compound_decode_hdr_maxsz + \
 806                                decode_sequence_maxsz + \
 807                                decode_putfh_maxsz + \
 808                                decode_getdevicelist_maxsz)
 809#define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
 810                                encode_sequence_maxsz +\
 811                                encode_getdeviceinfo_maxsz)
 812#define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
 813                                decode_sequence_maxsz + \
 814                                decode_getdeviceinfo_maxsz)
 815#define NFS4_enc_layoutget_sz   (compound_encode_hdr_maxsz + \
 816                                encode_sequence_maxsz + \
 817                                encode_putfh_maxsz +        \
 818                                encode_layoutget_maxsz)
 819#define NFS4_dec_layoutget_sz   (compound_decode_hdr_maxsz + \
 820                                decode_sequence_maxsz + \
 821                                decode_putfh_maxsz +        \
 822                                decode_layoutget_maxsz)
 823#define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
 824                                encode_sequence_maxsz +\
 825                                encode_putfh_maxsz + \
 826                                encode_layoutcommit_maxsz + \
 827                                encode_getattr_maxsz)
 828#define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
 829                                decode_sequence_maxsz + \
 830                                decode_putfh_maxsz + \
 831                                decode_layoutcommit_maxsz + \
 832                                decode_getattr_maxsz)
 833#define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
 834                                encode_sequence_maxsz + \
 835                                encode_putfh_maxsz + \
 836                                encode_layoutreturn_maxsz)
 837#define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
 838                                decode_sequence_maxsz + \
 839                                decode_putfh_maxsz + \
 840                                decode_layoutreturn_maxsz)
 841#define NFS4_enc_secinfo_no_name_sz     (compound_encode_hdr_maxsz + \
 842                                        encode_sequence_maxsz + \
 843                                        encode_putrootfh_maxsz +\
 844                                        encode_secinfo_no_name_maxsz)
 845#define NFS4_dec_secinfo_no_name_sz     (compound_decode_hdr_maxsz + \
 846                                        decode_sequence_maxsz + \
 847                                        decode_putrootfh_maxsz + \
 848                                        decode_secinfo_no_name_maxsz)
 849#define NFS4_enc_test_stateid_sz        (compound_encode_hdr_maxsz + \
 850                                         encode_sequence_maxsz + \
 851                                         encode_test_stateid_maxsz)
 852#define NFS4_dec_test_stateid_sz        (compound_decode_hdr_maxsz + \
 853                                         decode_sequence_maxsz + \
 854                                         decode_test_stateid_maxsz)
 855#define NFS4_enc_free_stateid_sz        (compound_encode_hdr_maxsz + \
 856                                         encode_sequence_maxsz + \
 857                                         encode_free_stateid_maxsz)
 858#define NFS4_dec_free_stateid_sz        (compound_decode_hdr_maxsz + \
 859                                         decode_sequence_maxsz + \
 860                                         decode_free_stateid_maxsz)
 861
 862const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 863                                      compound_encode_hdr_maxsz +
 864                                      encode_sequence_maxsz +
 865                                      encode_putfh_maxsz +
 866                                      encode_getattr_maxsz) *
 867                                     XDR_UNIT);
 868
 869const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 870                                     compound_decode_hdr_maxsz +
 871                                     decode_sequence_maxsz +
 872                                     decode_putfh_maxsz) *
 873                                    XDR_UNIT);
 874
 875const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH +
 876                                           compound_decode_hdr_maxsz +
 877                                           decode_sequence_maxsz) *
 878                                          XDR_UNIT);
 879EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead);
 880#endif /* CONFIG_NFS_V4_1 */
 881
 882static const umode_t nfs_type2fmt[] = {
 883        [NF4BAD] = 0,
 884        [NF4REG] = S_IFREG,
 885        [NF4DIR] = S_IFDIR,
 886        [NF4BLK] = S_IFBLK,
 887        [NF4CHR] = S_IFCHR,
 888        [NF4LNK] = S_IFLNK,
 889        [NF4SOCK] = S_IFSOCK,
 890        [NF4FIFO] = S_IFIFO,
 891        [NF4ATTRDIR] = 0,
 892        [NF4NAMEDATTR] = 0,
 893};
 894
 895struct compound_hdr {
 896        int32_t         status;
 897        uint32_t        nops;
 898        __be32 *        nops_p;
 899        uint32_t        taglen;
 900        char *          tag;
 901        uint32_t        replen;         /* expected reply words */
 902        u32             minorversion;
 903};
 904
 905static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
 906{
 907        __be32 *p = xdr_reserve_space(xdr, nbytes);
 908        BUG_ON(!p);
 909        return p;
 910}
 911
 912static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
 913{
 914        __be32 *p;
 915
 916        p = xdr_reserve_space(xdr, len);
 917        xdr_encode_opaque_fixed(p, buf, len);
 918}
 919
 920static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 921{
 922        __be32 *p;
 923
 924        p = reserve_space(xdr, 4 + len);
 925        xdr_encode_opaque(p, str, len);
 926}
 927
 928static void encode_uint32(struct xdr_stream *xdr, u32 n)
 929{
 930        __be32 *p;
 931
 932        p = reserve_space(xdr, 4);
 933        *p = cpu_to_be32(n);
 934}
 935
 936static void encode_uint64(struct xdr_stream *xdr, u64 n)
 937{
 938        __be32 *p;
 939
 940        p = reserve_space(xdr, 8);
 941        xdr_encode_hyper(p, n);
 942}
 943
 944static void encode_nfs4_seqid(struct xdr_stream *xdr,
 945                const struct nfs_seqid *seqid)
 946{
 947        encode_uint32(xdr, seqid->sequence->counter);
 948}
 949
 950static void encode_compound_hdr(struct xdr_stream *xdr,
 951                                struct rpc_rqst *req,
 952                                struct compound_hdr *hdr)
 953{
 954        __be32 *p;
 955        struct rpc_auth *auth = req->rq_cred->cr_auth;
 956
 957        /* initialize running count of expected bytes in reply.
 958         * NOTE: the replied tag SHOULD be the same is the one sent,
 959         * but this is not required as a MUST for the server to do so. */
 960        hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
 961
 962        WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
 963        encode_string(xdr, hdr->taglen, hdr->tag);
 964        p = reserve_space(xdr, 8);
 965        *p++ = cpu_to_be32(hdr->minorversion);
 966        hdr->nops_p = p;
 967        *p = cpu_to_be32(hdr->nops);
 968}
 969
 970static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
 971                uint32_t replen,
 972                struct compound_hdr *hdr)
 973{
 974        encode_uint32(xdr, op);
 975        hdr->nops++;
 976        hdr->replen += replen;
 977}
 978
 979static void encode_nops(struct compound_hdr *hdr)
 980{
 981        WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
 982        *hdr->nops_p = htonl(hdr->nops);
 983}
 984
 985static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
 986{
 987        encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
 988}
 989
 990static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 991{
 992        encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
 993}
 994
 995static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
 996                                const struct nfs4_label *label,
 997                                const struct nfs_server *server)
 998{
 999        char owner_name[IDMAP_NAMESZ];
1000        char owner_group[IDMAP_NAMESZ];

1001        int owner_namelen = 0;
1002        int owner_grouplen = 0;
1003        __be32 *p;
1004        unsigned i;
1005        uint32_t len = 0;
1006        uint32_t bmval_len;
1007        uint32_t bmval[3] = { 0 };
1008
1009        /*
1010         * We reserve enough space to write the entire attribute buffer at once.
1011         * In the worst-case, this would be
1012         * 16(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
1013         * = 40 bytes, plus any contribution from variable-length fields
1014         *            such as owner/group.
1015         */
1016        if (iap->ia_valid & ATTR_SIZE) {
1017                bmval[0] |= FATTR4_WORD0_SIZE;
1018                len += 8;
1019        }
1020        if (iap->ia_valid & ATTR_MODE) {
1021                bmval[1] |= FATTR4_WORD1_MODE;
1022                len += 4;
1023        }
1024        if (iap->ia_valid & ATTR_UID) {
1025                owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1026                if (owner_namelen < 0) {
1027                        dprintk("nfs: couldn't resolve uid %d to string\n",
1028                                        from_kuid(&init_user_ns, iap->ia_uid));
1029                        /* XXX */
1030                        strcpy(owner_name, "nobody");
1031                        owner_namelen = sizeof("nobody") - 1;
1032                        /* goto out; */
1033                }
1034                bmval[1] |= FATTR4_WORD1_OWNER;
1035                len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1036        }
1037        if (iap->ia_valid & ATTR_GID) {
1038                owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1039                if (owner_grouplen < 0) {
1040                        dprintk("nfs: couldn't resolve gid %d to string\n",
1041                                        from_kgid(&init_user_ns, iap->ia_gid));
1042                        strcpy(owner_group, "nobody");
1043                        owner_grouplen = sizeof("nobody") - 1;
1044                        /* goto out; */
1045                }
1046                bmval[1] |= FATTR4_WORD1_OWNER_GROUP;
1047                len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1048        }
1049        if (iap->ia_valid & ATTR_ATIME_SET) {
1050                bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1051                len += 16;
1052        } else if (iap->ia_valid & ATTR_ATIME) {
1053                bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1054                len += 4;
1055        }
1056        if (iap->ia_valid & ATTR_MTIME_SET) {
1057                bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1058                len += 16;
1059        } else if (iap->ia_valid & ATTR_MTIME) {
1060                bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1061                len += 4;
1062        }
1063        if (label) {
1064                len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1065                bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
1066        }
1067
1068        if (bmval[2] != 0)
1069                bmval_len = 3;
1070        else if (bmval[1] != 0)
1071                bmval_len = 2;
1072        else
1073                bmval_len = 1;
1074
1075        p = reserve_space(xdr, 4 + (bmval_len << 2) + 4 + len);
1076
1077        *p++ = cpu_to_be32(bmval_len);
1078        for (i = 0; i < bmval_len; i++)
1079                *p++ = cpu_to_be32(bmval[i]);
1080        *p++ = cpu_to_be32(len);
1081
1082        if (bmval[0] & FATTR4_WORD0_SIZE)
1083                p = xdr_encode_hyper(p, iap->ia_size);
1084        if (bmval[1] & FATTR4_WORD1_MODE)
1085                *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1086        if (bmval[1] & FATTR4_WORD1_OWNER)
1087                p = xdr_encode_opaque(p, owner_name, owner_namelen);
1088        if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
1089                p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1090        if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1091                if (iap->ia_valid & ATTR_ATIME_SET) {
1092                        *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1093                        p = xdr_encode_hyper(p, (s64)iap->ia_atime.tv_sec);
1094                        *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
1095                } else
1096                        *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1097        }
1098        if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1099                if (iap->ia_valid & ATTR_MTIME_SET) {
1100                        *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1101                        p = xdr_encode_hyper(p, (s64)iap->ia_mtime.tv_sec);
1102                        *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1103                } else
1104                        *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1105        }
1106        if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
1107                *p++ = cpu_to_be32(label->lfs);
1108                *p++ = cpu_to_be32(label->pi);
1109                *p++ = cpu_to_be32(label->len);
1110                p = xdr_encode_opaque_fixed(p, label->label, label->len);
1111        }
1112
1113/* out: */
1114}
1115
1116static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1117{
1118        encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1119        encode_uint32(xdr, access);
1120}
1121
1122static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1123{
1124        encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1125        encode_nfs4_seqid(xdr, arg->seqid);
1126        encode_nfs4_stateid(xdr, arg->stateid);
1127}
1128
1129static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1130{
1131        __be32 *p;
1132
1133        encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1134        p = reserve_space(xdr, 12);
1135        p = xdr_encode_hyper(p, args->offset);
1136        *p = cpu_to_be32(args->count);
1137}
1138
1139static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1140{
1141        __be32 *p;
1142
1143        encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1144        encode_uint32(xdr, create->ftype);
1145
1146        switch (create->ftype) {
1147        case NF4LNK:
1148                p = reserve_space(xdr, 4);
1149                *p = cpu_to_be32(create->u.symlink.len);
1150                xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
1151                break;
1152
1153        case NF4BLK: case NF4CHR:
1154                p = reserve_space(xdr, 8);
1155                *p++ = cpu_to_be32(create->u.device.specdata1);
1156                *p = cpu_to_be32(create->u.device.specdata2);
1157                break;
1158
1159        default:
1160                break;
1161        }
1162
1163        encode_string(xdr, create->name->len, create->name->name);
1164        encode_attrs(xdr, create->attrs, create->label, create->server);
1165}
1166
1167static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1168{
1169        __be32 *p;
1170
1171        encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1172        p = reserve_space(xdr, 8);
1173        *p++ = cpu_to_be32(1);
1174        *p = cpu_to_be32(bitmap);
1175}
1176
1177static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1178{
1179        __be32 *p;
1180
1181        encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1182        p = reserve_space(xdr, 12);
1183        *p++ = cpu_to_be32(2);
1184        *p++ = cpu_to_be32(bm0);
1185        *p = cpu_to_be32(bm1);
1186}
1187
1188static void
1189encode_getattr_three(struct xdr_stream *xdr,
1190                     uint32_t bm0, uint32_t bm1, uint32_t bm2,
1191                     struct compound_hdr *hdr)
1192{
1193        __be32 *p;
1194
1195        encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1196        if (bm2) {
1197                p = reserve_space(xdr, 16);
1198                *p++ = cpu_to_be32(3);
1199                *p++ = cpu_to_be32(bm0);
1200                *p++ = cpu_to_be32(bm1);
1201                *p = cpu_to_be32(bm2);
1202        } else if (bm1) {
1203                p = reserve_space(xdr, 12);
1204                *p++ = cpu_to_be32(2);
1205                *p++ = cpu_to_be32(bm0);
1206                *p = cpu_to_be32(bm1);
1207        } else {
1208                p = reserve_space(xdr, 8);
1209                *p++ = cpu_to_be32(1);
1210                *p = cpu_to_be32(bm0);
1211        }
1212}
1213
1214static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1215{
1216        encode_getattr_three(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1217                           bitmask[1] & nfs4_fattr_bitmap[1],
1218                           bitmask[2] & nfs4_fattr_bitmap[2],
1219                           hdr);
1220}
1221
1222static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1223                                 const u32 *open_bitmap,
1224                                 struct compound_hdr *hdr)
1225{
1226        encode_getattr_three(xdr,
1227                             bitmask[0] & open_bitmap[0],
1228                             bitmask[1] & open_bitmap[1],
1229                             bitmask[2] & open_bitmap[2],
1230                             hdr);
1231}
1232
1233static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1234{
1235        encode_getattr_three(xdr,
1236                             bitmask[0] & nfs4_fsinfo_bitmap[0],
1237                             bitmask[1] & nfs4_fsinfo_bitmap[1],
1238                             bitmask[2] & nfs4_fsinfo_bitmap[2],
1239                             hdr);
1240}
1241
1242static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1243{
1244        encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1245                           bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1246}
1247
1248static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1249{
1250        encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1251}
1252
1253static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1254{
1255        encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1256        encode_string(xdr, name->len, name->name);
1257}
1258
1259static inline int nfs4_lock_type(struct file_lock *fl, int block)
1260{
1261        if (fl->fl_type == F_RDLCK)
1262                return block ? NFS4_READW_LT : NFS4_READ_LT;
1263        return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1264}
1265
1266static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1267{
1268        if (fl->fl_end == OFFSET_MAX)
1269                return ~(uint64_t)0;
1270        return fl->fl_end - fl->fl_start + 1;
1271}
1272
1273static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1274{
1275        __be32 *p;
1276
1277        p = reserve_space(xdr, 32);
1278        p = xdr_encode_hyper(p, lowner->clientid);
1279        *p++ = cpu_to_be32(20);
1280        p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1281        *p++ = cpu_to_be32(lowner->s_dev);
1282        xdr_encode_hyper(p, lowner->id);
1283}
1284
1285/*
1286 * opcode,type,reclaim,offset,length,new_lock_owner = 32
1287 * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1288 */
1289static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1290{
1291        __be32 *p;
1292
1293        encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1294        p = reserve_space(xdr, 28);
1295        *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1296        *p++ = cpu_to_be32(args->reclaim);
1297        p = xdr_encode_hyper(p, args->fl->fl_start);
1298        p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1299        *p = cpu_to_be32(args->new_lock_owner);
1300        if (args->new_lock_owner){
1301                encode_nfs4_seqid(xdr, args->open_seqid);
1302                encode_nfs4_stateid(xdr, args->open_stateid);
1303                encode_nfs4_seqid(xdr, args->lock_seqid);
1304                encode_lockowner(xdr, &args->lock_owner);
1305        }
1306        else {
1307                encode_nfs4_stateid(xdr, args->lock_stateid);
1308                encode_nfs4_seqid(xdr, args->lock_seqid);
1309        }
1310}
1311
1312static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1313{
1314        __be32 *p;
1315
1316        encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1317        p = reserve_space(xdr, 20);
1318        *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1319        p = xdr_encode_hyper(p, args->fl->fl_start);
1320        p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1321        encode_lockowner(xdr, &args->lock_owner);
1322}
1323
1324static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1325{
1326        __be32 *p;
1327
1328        encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1329        encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1330        encode_nfs4_seqid(xdr, args->seqid);
1331        encode_nfs4_stateid(xdr, args->stateid);
1332        p = reserve_space(xdr, 16);
1333        p = xdr_encode_hyper(p, args->fl->fl_start);
1334        xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1335}
1336
1337static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1338{
1339        encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1340        encode_lockowner(xdr, lowner);
1341}
1342
1343static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1344{
1345        encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1346        encode_string(xdr, name->len, name->name);
1347}
1348
1349static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1350{
1351        __be32 *p;
1352
1353        p = reserve_space(xdr, 8);
1354        switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1355        case FMODE_READ:
1356                *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1357                break;
1358        case FMODE_WRITE:
1359                *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1360                break;
1361        case FMODE_READ|FMODE_WRITE:
1362                *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1363                break;
1364        default:
1365                *p++ = cpu_to_be32(0);
1366        }
1367        *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1368}
1369
1370static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1371{
1372        __be32 *p;
1373 /*
1374 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1375 * owner 4 = 32
1376 */
1377        encode_nfs4_seqid(xdr, arg->seqid);
1378        encode_share_access(xdr, arg->fmode);
1379        p = reserve_space(xdr, 36);
1380        p = xdr_encode_hyper(p, arg->clientid);
1381        *p++ = cpu_to_be32(24);
1382        p = xdr_encode_opaque_fixed(p, "open id:", 8);
1383        *p++ = cpu_to_be32(arg->server->s_dev);
1384        *p++ = cpu_to_be32(arg->id.uniquifier);
1385        xdr_encode_hyper(p, arg->id.create_time);
1386}
1387
1388static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1389{
1390        struct iattr dummy;
1391        __be32 *p;
1392
1393        p = reserve_space(xdr, 4);
1394        switch(arg->createmode) {
1395        case NFS4_CREATE_UNCHECKED:
1396                *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1397                encode_attrs(xdr, arg->u.attrs, arg->label, arg->server);
1398                break;
1399        case NFS4_CREATE_GUARDED:
1400                *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1401                encode_attrs(xdr, arg->u.attrs, arg->label, arg->server);
1402                break;
1403        case NFS4_CREATE_EXCLUSIVE:
1404                *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1405                encode_nfs4_verifier(xdr, &arg->u.verifier);
1406                break;
1407        case NFS4_CREATE_EXCLUSIVE4_1:
1408                *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1409                encode_nfs4_verifier(xdr, &arg->u.verifier);
1410                dummy.ia_valid = 0;
1411                encode_attrs(xdr, &dummy, arg->label, arg->server);
1412        }
1413}
1414
1415static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1416{
1417        __be32 *p;
1418
1419        p = reserve_space(xdr, 4);
1420        switch (arg->open_flags & O_CREAT) {
1421        case 0:
1422                *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1423                break;
1424        default:
1425                *p = cpu_to_be32(NFS4_OPEN_CREATE);
1426                encode_createmode(xdr, arg);
1427        }
1428}
1429
1430static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1431{
1432        __be32 *p;
1433
1434        p = reserve_space(xdr, 4);
1435        switch (delegation_type) {
1436        case 0:
1437                *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1438                break;
1439        case FMODE_READ:
1440                *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1441                break;
1442        case FMODE_WRITE|FMODE_READ:
1443                *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1444                break;
1445        default:
1446                BUG();
1447        }
1448}
1449
1450static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1451{
1452        __be32 *p;
1453
1454        p = reserve_space(xdr, 4);
1455        *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1456        encode_string(xdr, name->len, name->name);
1457}
1458
1459static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1460{
1461        __be32 *p;
1462
1463        p = reserve_space(xdr, 4);
1464        *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1465        encode_delegation_type(xdr, type);
1466}
1467
1468static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1469{
1470        __be32 *p;
1471
1472        p = reserve_space(xdr, 4);
1473        *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1474        encode_nfs4_stateid(xdr, stateid);
1475        encode_string(xdr, name->len, name->name);
1476}
1477
1478static inline void encode_claim_fh(struct xdr_stream *xdr)
1479{
1480        __be32 *p;
1481
1482        p = reserve_space(xdr, 4);
1483        *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1484}
1485
1486static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1487{
1488        __be32 *p;
1489
1490        p = reserve_space(xdr, 4);
1491        *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1492        encode_nfs4_stateid(xdr, stateid);
1493}
1494
1495static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1496{
1497        encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1498        encode_openhdr(xdr, arg);
1499        encode_opentype(xdr, arg);
1500        switch (arg->claim) {
1501        case NFS4_OPEN_CLAIM_NULL:
1502                encode_claim_null(xdr, arg->name);
1503                break;
1504        case NFS4_OPEN_CLAIM_PREVIOUS:
1505                encode_claim_previous(xdr, arg->u.delegation_type);
1506                break;
1507        case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1508                encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1509                break;
1510        case NFS4_OPEN_CLAIM_FH:
1511                encode_claim_fh(xdr);
1512                break;
1513        case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1514                encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1515                break;
1516        default:
1517                BUG();
1518        }
1519}
1520
1521static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1522{
1523        encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1524        encode_nfs4_stateid(xdr, arg->stateid);
1525        encode_nfs4_seqid(xdr, arg->seqid);
1526}
1527
1528static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1529{
1530        encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1531        encode_nfs4_stateid(xdr, arg->stateid);
1532        encode_nfs4_seqid(xdr, arg->seqid);
1533        encode_share_access(xdr, arg->fmode);
1534}
1535
1536static void
1537encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1538{
1539        encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1540        encode_string(xdr, fh->size, fh->data);
1541}
1542
1543static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1544{
1545        encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1546}
1547
1548static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1549{
1550        __be32 *p;
1551
1552        encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1553        encode_nfs4_stateid(xdr, &args->stateid);
1554
1555        p = reserve_space(xdr, 12);
1556        p = xdr_encode_hyper(p, args->offset);
1557        *p = cpu_to_be32(args->count);
1558}
1559
1560static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1561{
1562        uint32_t attrs[3] = {
1563                FATTR4_WORD0_RDATTR_ERROR,
1564                FATTR4_WORD1_MOUNTED_ON_FILEID,
1565        };
1566        uint32_t dircount = readdir->count >> 1;
1567        __be32 *p, verf[2];
1568
1569        if (readdir->plus) {
1570                attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1571                        FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1572                attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1573                        FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1574                        FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1575                        FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1576                dircount >>= 1;
1577        }
1578        /* Use mounted_on_fileid only if the server supports it */
1579        if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1580                attrs[0] |= FATTR4_WORD0_FILEID;
1581
1582        encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1583        encode_uint64(xdr, readdir->cookie);
1584        encode_nfs4_verifier(xdr, &readdir->verifier);
1585        p = reserve_space(xdr, encode_readdir_space);
1586        *p++ = cpu_to_be32(dircount);
1587        *p++ = cpu_to_be32(readdir->count);
1588        *p++ = cpu_to_be32(encode_readdir_bitmask_sz);
1589        *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1590        *p   = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1591        if (encode_readdir_bitmask_sz > 2) {
1592                if (hdr->minorversion > 1)
1593                        attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1594                p++, *p++ = cpu_to_be32(attrs[2] & readdir->bitmask[2]);
1595        }
1596        memcpy(verf, readdir->verifier.data, sizeof(verf));
1597
1598        dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1599                        __func__,
1600                        (unsigned long long)readdir->cookie,
1601                        verf[0], verf[1],
1602                        attrs[0] & readdir->bitmask[0],
1603                        attrs[1] & readdir->bitmask[1],
1604                        attrs[2] & readdir->bitmask[2]);
1605}
1606
1607static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1608{
1609        encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1610}
1611
1612static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1613{
1614        encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1615        encode_string(xdr, name->len, name->name);
1616}
1617
1618static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1619{
1620        encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1621        encode_string(xdr, oldname->len, oldname->name);
1622        encode_string(xdr, newname->len, newname->name);
1623}
1624
1625static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1626                         struct compound_hdr *hdr)
1627{
1628        encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1629        encode_uint64(xdr, clid);
1630}
1631
1632static void
1633encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1634{
1635        encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1636}
1637
1638static void
1639encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1640{
1641        __be32 *p;
1642
1643        encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1644        encode_nfs4_stateid(xdr, &zero_stateid);
1645        p = reserve_space(xdr, 2*4);
1646        *p++ = cpu_to_be32(1);
1647        *p = cpu_to_be32(FATTR4_WORD0_ACL);
1648        p = reserve_space(xdr, 4);
1649        *p = cpu_to_be32(arg->acl_len);
1650        xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1651}
1652
1653static void
1654encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1655{
1656        encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1657}
1658
1659static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1660{
1661        encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1662        encode_nfs4_stateid(xdr, &arg->stateid);
1663        encode_attrs(xdr, arg->iap, arg->label, server);
1664}
1665
1666static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1667{
1668        __be32 *p;
1669
1670        encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1671        encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1672
1673        encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1674        p = reserve_space(xdr, 4);
1675        *p = cpu_to_be32(setclientid->sc_prog);
1676        encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1677        encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1678        p = reserve_space(xdr, 4);
1679        *p = cpu_to_be32(setclientid->sc_cb_ident);
1680}
1681
1682static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1683{
1684        encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1685                        decode_setclientid_confirm_maxsz, hdr);
1686        encode_uint64(xdr, arg->clientid);
1687        encode_nfs4_verifier(xdr, &arg->confirm);
1688}
1689
1690static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1691{
1692        __be32 *p;
1693
1694        encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1695        encode_nfs4_stateid(xdr, &args->stateid);
1696
1697        p = reserve_space(xdr, 16);
1698        p = xdr_encode_hyper(p, args->offset);
1699        *p++ = cpu_to_be32(args->stable);
1700        *p = cpu_to_be32(args->count);
1701
1702        xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1703}
1704
1705static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1706{
1707        encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1708        encode_nfs4_stateid(xdr, stateid);
1709}
1710
1711static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1712{
1713        encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1714        encode_string(xdr, name->len, name->name);
1715}
1716
1717#if defined(CONFIG_NFS_V4_1)
1718/* NFSv4.1 operations */
1719static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1720                                   struct nfs4_session *session,
1721                                   struct compound_hdr *hdr)
1722{
1723        __be32 *p;
1724
1725        encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1726                decode_bind_conn_to_session_maxsz, hdr);
1727        encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1728        p = xdr_reserve_space(xdr, 8);
1729        *p++ = cpu_to_be32(NFS4_CDFC4_BACK_OR_BOTH);
1730        *p = 0; /* use_conn_in_rdma_mode = False */
1731}
1732
1733static void encode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
1734{
1735        unsigned int i;
1736        encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
1737        for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
1738                encode_uint32(xdr, op_map->u.words[i]);
1739}
1740
1741static void encode_exchange_id(struct xdr_stream *xdr,
1742                               struct nfs41_exchange_id_args *args,
1743                               struct compound_hdr *hdr)
1744{
1745        __be32 *p;
1746        char impl_name[IMPL_NAME_LIMIT];
1747        int len = 0;
1748
1749        encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1750        encode_nfs4_verifier(xdr, args->verifier);
1751
1752        encode_string(xdr, args->id_len, args->id);
1753
1754        encode_uint32(xdr, args->flags);
1755        encode_uint32(xdr, args->state_protect.how);
1756
1757        switch (args->state_protect.how) {
1758        case SP4_NONE:
1759                break;
1760        case SP4_MACH_CRED:
1761                encode_op_map(xdr, &args->state_protect.enforce);
1762                encode_op_map(xdr, &args->state_protect.allow);
1763                break;
1764        default:
1765                WARN_ON_ONCE(1);
1766                break;
1767        }
1768
1769        if (send_implementation_id &&
1770            sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1771            sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1772                <= sizeof(impl_name) + 1)
1773                len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1774                               utsname()->sysname, utsname()->release,
1775                               utsname()->version, utsname()->machine);
1776
1777        if (len > 0) {
1778                encode_uint32(xdr, 1);  /* implementation id array length=1 */
1779
1780                encode_string(xdr,
1781                        sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1782                        CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1783                encode_string(xdr, len, impl_name);
1784                /* just send zeros for nii_date - the date is in nii_name */
1785                p = reserve_space(xdr, 12);
1786                p = xdr_encode_hyper(p, 0);
1787                *p = cpu_to_be32(0);
1788        } else
1789                encode_uint32(xdr, 0);  /* implementation id array length=0 */
1790}
1791
1792static void encode_create_session(struct xdr_stream *xdr,
1793                                  struct nfs41_create_session_args *args,
1794                                  struct compound_hdr *hdr)
1795{
1796        __be32 *p;
1797        char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1798        uint32_t len;
1799        struct nfs_client *clp = args->client;
1800        struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1801        u32 max_resp_sz_cached;
1802
1803        /*
1804         * Assumes OPEN is the biggest non-idempotent compound.
1805         * 2 is the verifier.
1806         */
1807        max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1808                              RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1809
1810        len = scnprintf(machine_name, sizeof(machine_name), "%s",
1811                        clp->cl_ipaddr);
1812
1813        encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1814        p = reserve_space(xdr, 16 + 2*28 + 20 + len + 12);
1815        p = xdr_encode_hyper(p, clp->cl_clientid);
1816        *p++ = cpu_to_be32(clp->cl_seqid);                      /*Sequence id */
1817        *p++ = cpu_to_be32(args->flags);                        /*flags */
1818
1819        /* Fore Channel */
1820        *p++ = cpu_to_be32(0);                          /* header padding size */
1821        *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1822        *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1823        *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1824        *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1825        *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1826        *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1827
1828        /* Back Channel */
1829        *p++ = cpu_to_be32(0);                          /* header padding size */
1830        *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1831        *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1832        *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1833        *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1834        *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1835        *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1836
1837        *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1838        *p++ = cpu_to_be32(1);
1839        *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1840
1841        /* authsys_parms rfc1831 */
1842        *p++ = cpu_to_be32(nn->boot_time.tv_nsec);      /* stamp */
1843        p = xdr_encode_opaque(p, machine_name, len);
1844        *p++ = cpu_to_be32(0);                          /* UID */
1845        *p++ = cpu_to_be32(0);                          /* GID */
1846        *p = cpu_to_be32(0);                            /* No more gids */
1847}
1848
1849static void encode_destroy_session(struct xdr_stream *xdr,
1850                                   struct nfs4_session *session,
1851                                   struct compound_hdr *hdr)
1852{
1853        encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1854        encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1855}
1856
1857static void encode_destroy_clientid(struct xdr_stream *xdr,
1858                                   uint64_t clientid,
1859                                   struct compound_hdr *hdr)
1860{
1861        encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1862        encode_uint64(xdr, clientid);
1863}
1864
1865static void encode_reclaim_complete(struct xdr_stream *xdr,
1866                                    struct nfs41_reclaim_complete_args *args,
1867                                    struct compound_hdr *hdr)
1868{
1869        encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1870        encode_uint32(xdr, args->one_fs);
1871}
1872#endif /* CONFIG_NFS_V4_1 */
1873
1874static void encode_sequence(struct xdr_stream *xdr,
1875                            const struct nfs4_sequence_args *args,
1876                            struct compound_hdr *hdr)
1877{
1878#if defined(CONFIG_NFS_V4_1)
1879        struct nfs4_session *session;
1880        struct nfs4_slot_table *tp;
1881        struct nfs4_slot *slot = args->sa_slot;
1882        __be32 *p;
1883
1884        tp = slot->table;
1885        session = tp->session;
1886        if (!session)
1887                return;
1888
1889        encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1890
1891        /*
1892         * Sessionid + seqid + slotid + max slotid + cache_this
1893         */
1894        dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1895                "max_slotid=%d cache_this=%d\n",
1896                __func__,
1897                ((u32 *)session->sess_id.data)[0],
1898                ((u32 *)session->sess_id.data)[1],
1899                ((u32 *)session->sess_id.data)[2],
1900                ((u32 *)session->sess_id.data)[3],
1901                slot->seq_nr, slot->slot_nr,
1902                tp->highest_used_slotid, args->sa_cache_this);
1903        p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1904        p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1905        *p++ = cpu_to_be32(slot->seq_nr);
1906        *p++ = cpu_to_be32(slot->slot_nr);
1907        *p++ = cpu_to_be32(tp->highest_used_slotid);
1908        *p = cpu_to_be32(args->sa_cache_this);
1909#endif /* CONFIG_NFS_V4_1 */
1910}
1911
1912#ifdef CONFIG_NFS_V4_1
1913static void
1914encode_getdevicelist(struct xdr_stream *xdr,
1915                     const struct nfs4_getdevicelist_args *args,
1916                     struct compound_hdr *hdr)
1917{
1918        __be32 *p;
1919        nfs4_verifier dummy = {
1920                .data = "dummmmmy",
1921        };
1922
1923        encode_op_hdr(xdr, OP_GETDEVICELIST, decode_getdevicelist_maxsz, hdr);
1924        p = reserve_space(xdr, 16);
1925        *p++ = cpu_to_be32(args->layoutclass);
1926        *p++ = cpu_to_be32(NFS4_PNFS_GETDEVLIST_MAXNUM);
1927        xdr_encode_hyper(p, 0ULL);                          /* cookie */
1928        encode_nfs4_verifier(xdr, &dummy);
1929}
1930
1931static void
1932encode_getdeviceinfo(struct xdr_stream *xdr,
1933                     const struct nfs4_getdeviceinfo_args *args,
1934                     struct compound_hdr *hdr)
1935{
1936        __be32 *p;
1937
1938        encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1939        p = reserve_space(xdr, 12 + NFS4_DEVICEID4_SIZE);
1940        p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1941                                    NFS4_DEVICEID4_SIZE);
1942        *p++ = cpu_to_be32(args->pdev->layout_type);
1943        *p++ = cpu_to_be32(args->pdev->maxcount);       /* gdia_maxcount */
1944        *p++ = cpu_to_be32(0);                          /* bitmap length 0 */
1945}
1946
1947static void
1948encode_layoutget(struct xdr_stream *xdr,
1949                      const struct nfs4_layoutget_args *args,
1950                      struct compound_hdr *hdr)
1951{
1952        __be32 *p;
1953
1954        encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1955        p = reserve_space(xdr, 36);
1956        *p++ = cpu_to_be32(0);     /* Signal layout available */
1957        *p++ = cpu_to_be32(args->type);
1958        *p++ = cpu_to_be32(args->range.iomode);
1959        p = xdr_encode_hyper(p, args->range.offset);
1960        p = xdr_encode_hyper(p, args->range.length);
1961        p = xdr_encode_hyper(p, args->minlength);
1962        encode_nfs4_stateid(xdr, &args->stateid);
1963        encode_uint32(xdr, args->maxcount);
1964
1965        dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1966                __func__,
1967                args->type,
1968                args->range.iomode,
1969                (unsigned long)args->range.offset,
1970                (unsigned long)args->range.length,
1971                args->maxcount);
1972}
1973
1974static int
1975encode_layoutcommit(struct xdr_stream *xdr,
1976                    struct inode *inode,
1977                    const struct nfs4_layoutcommit_args *args,
1978                    struct compound_hdr *hdr)
1979{
1980        __be32 *p;
1981
1982        dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1983                NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1984
1985        encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
1986        p = reserve_space(xdr, 20);
1987        /* Only whole file layouts */
1988        p = xdr_encode_hyper(p, 0); /* offset */
1989        p = xdr_encode_hyper(p, args->lastbytewritten + 1);     /* length */
1990        *p = cpu_to_be32(0); /* reclaim */
1991        encode_nfs4_stateid(xdr, &args->stateid);
1992        p = reserve_space(xdr, 20);
1993        *p++ = cpu_to_be32(1); /* newoffset = TRUE */
1994        p = xdr_encode_hyper(p, args->lastbytewritten);
1995        *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
1996        *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
1997
1998        if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit)
1999                NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
2000                        NFS_I(inode)->layout, xdr, args);

2001        else
2002                encode_uint32(xdr, 0); /* no layout-type payload */
2003
2004        return 0;
2005}
2006
2007static void
2008encode_layoutreturn(struct xdr_stream *xdr,
2009                    const struct nfs4_layoutreturn_args *args,
2010                    struct compound_hdr *hdr)
2011{
2012        __be32 *p;
2013
2014        encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2015        p = reserve_space(xdr, 16);
2016        *p++ = cpu_to_be32(0);          /* reclaim. always 0 for now */
2017        *p++ = cpu_to_be32(args->layout_type);
2018        *p++ = cpu_to_be32(IOMODE_ANY);
2019        *p = cpu_to_be32(RETURN_FILE);
2020        p = reserve_space(xdr, 16);
2021        p = xdr_encode_hyper(p, 0);
2022        p = xdr_encode_hyper(p, NFS4_MAX_UINT64);
2023        spin_lock(&args->inode->i_lock);
2024        encode_nfs4_stateid(xdr, &args->stateid);
2025        spin_unlock(&args->inode->i_lock);
2026        if (NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn) {
2027                NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn(
2028                        NFS_I(args->inode)->layout, xdr, args);
2029        } else
2030                encode_uint32(xdr, 0);
2031}
2032
2033static int
2034encode_secinfo_no_name(struct xdr_stream *xdr,
2035                       const struct nfs41_secinfo_no_name_args *args,
2036                       struct compound_hdr *hdr)
2037{
2038        encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2039        encode_uint32(xdr, args->style);
2040        return 0;
2041}
2042
2043static void encode_test_stateid(struct xdr_stream *xdr,
2044                                struct nfs41_test_stateid_args *args,
2045                                struct compound_hdr *hdr)
2046{
2047        encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2048        encode_uint32(xdr, 1);
2049        encode_nfs4_stateid(xdr, args->stateid);
2050}
2051
2052static void encode_free_stateid(struct xdr_stream *xdr,
2053                                struct nfs41_free_stateid_args *args,
2054                                struct compound_hdr *hdr)
2055{
2056        encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2057        encode_nfs4_stateid(xdr, &args->stateid);
2058}
2059#endif /* CONFIG_NFS_V4_1 */
2060
2061/*
2062 * END OF "GENERIC" ENCODE ROUTINES.
2063 */
2064
2065static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2066{
2067#if defined(CONFIG_NFS_V4_1)
2068        struct nfs4_session *session = args->sa_slot->table->session;
2069        if (session)
2070                return session->clp->cl_mvops->minor_version;
2071#endif /* CONFIG_NFS_V4_1 */
2072        return 0;
2073}
2074
2075/*
2076 * Encode an ACCESS request
2077 */
2078static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2079                                const struct nfs4_accessargs *args)
2080{
2081        struct compound_hdr hdr = {
2082                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2083        };
2084
2085        encode_compound_hdr(xdr, req, &hdr);
2086        encode_sequence(xdr, &args->seq_args, &hdr);
2087        encode_putfh(xdr, args->fh, &hdr);
2088        encode_access(xdr, args->access, &hdr);
2089        encode_getfattr(xdr, args->bitmask, &hdr);
2090        encode_nops(&hdr);
2091}
2092
2093/*
2094 * Encode LOOKUP request
2095 */
2096static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2097                                const struct nfs4_lookup_arg *args)
2098{
2099        struct compound_hdr hdr = {
2100                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2101        };
2102
2103        encode_compound_hdr(xdr, req, &hdr);
2104        encode_sequence(xdr, &args->seq_args, &hdr);
2105        encode_putfh(xdr, args->dir_fh, &hdr);
2106        encode_lookup(xdr, args->name, &hdr);
2107        encode_getfh(xdr, &hdr);
2108        encode_getfattr(xdr, args->bitmask, &hdr);
2109        encode_nops(&hdr);
2110}
2111
2112/*
2113 * Encode LOOKUP_ROOT request
2114 */
2115static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2116                                     struct xdr_stream *xdr,
2117                                     const struct nfs4_lookup_root_arg *args)
2118{
2119        struct compound_hdr hdr = {
2120                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2121        };
2122
2123        encode_compound_hdr(xdr, req, &hdr);
2124        encode_sequence(xdr, &args->seq_args, &hdr);
2125        encode_putrootfh(xdr, &hdr);
2126        encode_getfh(xdr, &hdr);
2127        encode_getfattr(xdr, args->bitmask, &hdr);
2128        encode_nops(&hdr);
2129}
2130
2131/*
2132 * Encode REMOVE request
2133 */
2134static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2135                                const struct nfs_removeargs *args)
2136{
2137        struct compound_hdr hdr = {
2138                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2139        };
2140
2141        encode_compound_hdr(xdr, req, &hdr);
2142        encode_sequence(xdr, &args->seq_args, &hdr);
2143        encode_putfh(xdr, args->fh, &hdr);
2144        encode_remove(xdr, &args->name, &hdr);
2145        encode_nops(&hdr);
2146}
2147
2148/*
2149 * Encode RENAME request
2150 */
2151static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2152                                const struct nfs_renameargs *args)
2153{
2154        struct compound_hdr hdr = {
2155                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2156        };
2157
2158        encode_compound_hdr(xdr, req, &hdr);
2159        encode_sequence(xdr, &args->seq_args, &hdr);
2160        encode_putfh(xdr, args->old_dir, &hdr);
2161        encode_savefh(xdr, &hdr);
2162        encode_putfh(xdr, args->new_dir, &hdr);
2163        encode_rename(xdr, args->old_name, args->new_name, &hdr);
2164        encode_nops(&hdr);
2165}
2166
2167/*
2168 * Encode LINK request
2169 */
2170static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2171                             const struct nfs4_link_arg *args)
2172{
2173        struct compound_hdr hdr = {
2174                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2175        };
2176
2177        encode_compound_hdr(xdr, req, &hdr);
2178        encode_sequence(xdr, &args->seq_args, &hdr);
2179        encode_putfh(xdr, args->fh, &hdr);
2180        encode_savefh(xdr, &hdr);
2181        encode_putfh(xdr, args->dir_fh, &hdr);
2182        encode_link(xdr, args->name, &hdr);
2183        encode_restorefh(xdr, &hdr);
2184        encode_getfattr(xdr, args->bitmask, &hdr);
2185        encode_nops(&hdr);
2186}
2187
2188/*
2189 * Encode CREATE request
2190 */
2191static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2192                                const struct nfs4_create_arg *args)
2193{
2194        struct compound_hdr hdr = {
2195                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2196        };
2197
2198        encode_compound_hdr(xdr, req, &hdr);
2199        encode_sequence(xdr, &args->seq_args, &hdr);
2200        encode_putfh(xdr, args->dir_fh, &hdr);
2201        encode_create(xdr, args, &hdr);
2202        encode_getfh(xdr, &hdr);
2203        encode_getfattr(xdr, args->bitmask, &hdr);
2204        encode_nops(&hdr);
2205}
2206
2207/*
2208 * Encode SYMLINK request
2209 */
2210static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2211                                 const struct nfs4_create_arg *args)
2212{
2213        nfs4_xdr_enc_create(req, xdr, args);
2214}
2215
2216/*
2217 * Encode GETATTR request
2218 */
2219static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2220                                 const struct nfs4_getattr_arg *args)
2221{
2222        struct compound_hdr hdr = {
2223                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2224        };
2225
2226        encode_compound_hdr(xdr, req, &hdr);
2227        encode_sequence(xdr, &args->seq_args, &hdr);
2228        encode_putfh(xdr, args->fh, &hdr);
2229        encode_getfattr(xdr, args->bitmask, &hdr);
2230        encode_nops(&hdr);
2231}
2232
2233/*
2234 * Encode a CLOSE request
2235 */
2236static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2237                               struct nfs_closeargs *args)
2238{
2239        struct compound_hdr hdr = {
2240                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2241        };
2242
2243        encode_compound_hdr(xdr, req, &hdr);
2244        encode_sequence(xdr, &args->seq_args, &hdr);
2245        encode_putfh(xdr, args->fh, &hdr);
2246        encode_close(xdr, args, &hdr);
2247        encode_getfattr(xdr, args->bitmask, &hdr);
2248        encode_nops(&hdr);
2249}
2250
2251/*
2252 * Encode an OPEN request
2253 */
2254static void nfs4_xdr_enc_open(struct rpc_rqst *req, 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        encode_getfh(xdr, &hdr);
2266        if (args->access)
2267                encode_access(xdr, args->access, &hdr);
2268        encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2269        encode_nops(&hdr);
2270}
2271
2272/*
2273 * Encode an OPEN_CONFIRM request
2274 */
2275static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2276                                      struct xdr_stream *xdr,
2277                                      struct nfs_open_confirmargs *args)
2278{
2279        struct compound_hdr hdr = {
2280                .nops   = 0,
2281        };
2282
2283        encode_compound_hdr(xdr, req, &hdr);
2284        encode_putfh(xdr, args->fh, &hdr);
2285        encode_open_confirm(xdr, args, &hdr);
2286        encode_nops(&hdr);
2287}
2288
2289/*
2290 * Encode an OPEN request with no attributes.
2291 */
2292static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2293                                     struct xdr_stream *xdr,
2294                                     struct nfs_openargs *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_open(xdr, args, &hdr);
2304        if (args->access)
2305                encode_access(xdr, args->access, &hdr);
2306        encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2307        encode_nops(&hdr);
2308}
2309
2310/*
2311 * Encode an OPEN_DOWNGRADE request
2312 */
2313static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2314                                        struct xdr_stream *xdr,
2315                                        struct nfs_closeargs *args)
2316{
2317        struct compound_hdr hdr = {
2318                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2319        };
2320
2321        encode_compound_hdr(xdr, req, &hdr);
2322        encode_sequence(xdr, &args->seq_args, &hdr);
2323        encode_putfh(xdr, args->fh, &hdr);
2324        encode_open_downgrade(xdr, args, &hdr);
2325        encode_getfattr(xdr, args->bitmask, &hdr);
2326        encode_nops(&hdr);
2327}
2328
2329/*
2330 * Encode a LOCK request
2331 */
2332static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2333                              struct nfs_lock_args *args)
2334{
2335        struct compound_hdr hdr = {
2336                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2337        };
2338
2339        encode_compound_hdr(xdr, req, &hdr);
2340        encode_sequence(xdr, &args->seq_args, &hdr);
2341        encode_putfh(xdr, args->fh, &hdr);
2342        encode_lock(xdr, args, &hdr);
2343        encode_nops(&hdr);
2344}
2345
2346/*
2347 * Encode a LOCKT request
2348 */
2349static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2350                               struct nfs_lockt_args *args)
2351{
2352        struct compound_hdr hdr = {
2353                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2354        };
2355
2356        encode_compound_hdr(xdr, req, &hdr);
2357        encode_sequence(xdr, &args->seq_args, &hdr);
2358        encode_putfh(xdr, args->fh, &hdr);
2359        encode_lockt(xdr, args, &hdr);
2360        encode_nops(&hdr);
2361}
2362
2363/*
2364 * Encode a LOCKU request
2365 */
2366static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2367                               struct nfs_locku_args *args)
2368{
2369        struct compound_hdr hdr = {
2370                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2371        };
2372
2373        encode_compound_hdr(xdr, req, &hdr);
2374        encode_sequence(xdr, &args->seq_args, &hdr);
2375        encode_putfh(xdr, args->fh, &hdr);
2376        encode_locku(xdr, args, &hdr);
2377        encode_nops(&hdr);
2378}
2379
2380static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2381                                           struct xdr_stream *xdr,
2382                                        struct nfs_release_lockowner_args *args)
2383{
2384        struct compound_hdr hdr = {
2385                .minorversion = 0,
2386        };
2387
2388        encode_compound_hdr(xdr, req, &hdr);
2389        encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2390        encode_nops(&hdr);
2391}
2392
2393/*
2394 * Encode a READLINK request
2395 */
2396static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2397                                  const struct nfs4_readlink *args)
2398{
2399        struct compound_hdr hdr = {
2400                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2401        };
2402
2403        encode_compound_hdr(xdr, req, &hdr);
2404        encode_sequence(xdr, &args->seq_args, &hdr);
2405        encode_putfh(xdr, args->fh, &hdr);
2406        encode_readlink(xdr, args, req, &hdr);
2407
2408        xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2409                        args->pgbase, args->pglen);
2410        encode_nops(&hdr);
2411}
2412
2413/*
2414 * Encode a READDIR request
2415 */
2416static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2417                                 const struct nfs4_readdir_arg *args)
2418{
2419        struct compound_hdr hdr = {
2420                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2421        };
2422
2423        encode_compound_hdr(xdr, req, &hdr);
2424        encode_sequence(xdr, &args->seq_args, &hdr);
2425        encode_putfh(xdr, args->fh, &hdr);
2426        encode_readdir(xdr, args, req, &hdr);
2427
2428        xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2429                         args->pgbase, args->count);
2430        dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2431                        __func__, hdr.replen << 2, args->pages,
2432                        args->pgbase, args->count);
2433        encode_nops(&hdr);
2434}
2435
2436/*
2437 * Encode a READ request
2438 */
2439static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2440                              struct nfs_readargs *args)
2441{
2442        struct compound_hdr hdr = {
2443                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2444        };
2445
2446        encode_compound_hdr(xdr, req, &hdr);
2447        encode_sequence(xdr, &args->seq_args, &hdr);
2448        encode_putfh(xdr, args->fh, &hdr);
2449        encode_read(xdr, args, &hdr);
2450
2451        xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2452                         args->pages, args->pgbase, args->count);
2453        req->rq_rcv_buf.flags |= XDRBUF_READ;
2454        encode_nops(&hdr);
2455}
2456
2457/*
2458 * Encode an SETATTR request
2459 */
2460static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2461                                 struct nfs_setattrargs *args)
2462{
2463        struct compound_hdr hdr = {
2464                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2465        };
2466
2467        encode_compound_hdr(xdr, req, &hdr);
2468        encode_sequence(xdr, &args->seq_args, &hdr);
2469        encode_putfh(xdr, args->fh, &hdr);
2470        encode_setattr(xdr, args, args->server, &hdr);
2471        encode_getfattr(xdr, args->bitmask, &hdr);
2472        encode_nops(&hdr);
2473}
2474
2475/*
2476 * Encode a GETACL request
2477 */
2478static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2479                                struct nfs_getaclargs *args)
2480{
2481        struct compound_hdr hdr = {
2482                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2483        };
2484        uint32_t replen;
2485
2486        encode_compound_hdr(xdr, req, &hdr);
2487        encode_sequence(xdr, &args->seq_args, &hdr);
2488        encode_putfh(xdr, args->fh, &hdr);
2489        replen = hdr.replen + op_decode_hdr_maxsz + 1;
2490        encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2491
2492        xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2493                args->acl_pages, args->acl_pgbase, args->acl_len);
2494
2495        encode_nops(&hdr);
2496}
2497
2498/*
2499 * Encode a WRITE request
2500 */
2501static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2502                               struct nfs_writeargs *args)
2503{
2504        struct compound_hdr hdr = {
2505                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2506        };
2507
2508        encode_compound_hdr(xdr, req, &hdr);
2509        encode_sequence(xdr, &args->seq_args, &hdr);
2510        encode_putfh(xdr, args->fh, &hdr);
2511        encode_write(xdr, args, &hdr);
2512        req->rq_snd_buf.flags |= XDRBUF_WRITE;
2513        if (args->bitmask)
2514                encode_getfattr(xdr, args->bitmask, &hdr);
2515        encode_nops(&hdr);
2516}
2517
2518/*
2519 *  a COMMIT request
2520 */
2521static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2522                                struct nfs_commitargs *args)
2523{
2524        struct compound_hdr hdr = {
2525                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2526        };
2527
2528        encode_compound_hdr(xdr, req, &hdr);
2529        encode_sequence(xdr, &args->seq_args, &hdr);
2530        encode_putfh(xdr, args->fh, &hdr);
2531        encode_commit(xdr, args, &hdr);
2532        encode_nops(&hdr);
2533}
2534
2535/*
2536 * FSINFO request
2537 */
2538static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2539                                struct nfs4_fsinfo_arg *args)
2540{
2541        struct compound_hdr hdr = {
2542                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2543        };
2544
2545        encode_compound_hdr(xdr, req, &hdr);
2546        encode_sequence(xdr, &args->seq_args, &hdr);
2547        encode_putfh(xdr, args->fh, &hdr);
2548        encode_fsinfo(xdr, args->bitmask, &hdr);
2549        encode_nops(&hdr);
2550}
2551
2552/*
2553 * a PATHCONF request
2554 */
2555static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2556                                  const struct nfs4_pathconf_arg *args)
2557{
2558        struct compound_hdr hdr = {
2559                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2560        };
2561
2562        encode_compound_hdr(xdr, req, &hdr);
2563        encode_sequence(xdr, &args->seq_args, &hdr);
2564        encode_putfh(xdr, args->fh, &hdr);
2565        encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2566                           &hdr);
2567        encode_nops(&hdr);
2568}
2569
2570/*
2571 * a STATFS request
2572 */
2573static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2574                                const struct nfs4_statfs_arg *args)
2575{
2576        struct compound_hdr hdr = {
2577                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2578        };
2579
2580        encode_compound_hdr(xdr, req, &hdr);
2581        encode_sequence(xdr, &args->seq_args, &hdr);
2582        encode_putfh(xdr, args->fh, &hdr);
2583        encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2584                           args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2585        encode_nops(&hdr);
2586}
2587
2588/*
2589 * GETATTR_BITMAP request
2590 */
2591static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2592                                     struct xdr_stream *xdr,
2593                                     struct nfs4_server_caps_arg *args)
2594{
2595        struct compound_hdr hdr = {
2596                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2597        };
2598
2599        encode_compound_hdr(xdr, req, &hdr);
2600        encode_sequence(xdr, &args->seq_args, &hdr);
2601        encode_putfh(xdr, args->fhandle, &hdr);
2602        encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2603                           FATTR4_WORD0_FH_EXPIRE_TYPE|
2604                           FATTR4_WORD0_LINK_SUPPORT|
2605                           FATTR4_WORD0_SYMLINK_SUPPORT|
2606                           FATTR4_WORD0_ACLSUPPORT, &hdr);
2607        encode_nops(&hdr);
2608}
2609
2610/*
2611 * a RENEW request
2612 */
2613static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2614                               struct nfs_client *clp)
2615{
2616        struct compound_hdr hdr = {
2617                .nops   = 0,
2618        };
2619
2620        encode_compound_hdr(xdr, req, &hdr);
2621        encode_renew(xdr, clp->cl_clientid, &hdr);
2622        encode_nops(&hdr);
2623}
2624
2625/*
2626 * a SETCLIENTID request
2627 */
2628static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2629                                     struct xdr_stream *xdr,
2630                                     struct nfs4_setclientid *sc)
2631{
2632        struct compound_hdr hdr = {
2633                .nops   = 0,
2634        };
2635
2636        encode_compound_hdr(xdr, req, &hdr);
2637        encode_setclientid(xdr, sc, &hdr);
2638        encode_nops(&hdr);
2639}
2640
2641/*
2642 * a SETCLIENTID_CONFIRM request
2643 */
2644static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2645                                             struct xdr_stream *xdr,
2646                                             struct nfs4_setclientid_res *arg)
2647{
2648        struct compound_hdr hdr = {
2649                .nops   = 0,
2650        };
2651
2652        encode_compound_hdr(xdr, req, &hdr);
2653        encode_setclientid_confirm(xdr, arg, &hdr);
2654        encode_nops(&hdr);
2655}
2656
2657/*
2658 * DELEGRETURN request
2659 */
2660static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2661                                     struct xdr_stream *xdr,
2662                                     const struct nfs4_delegreturnargs *args)
2663{
2664        struct compound_hdr hdr = {
2665                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2666        };
2667
2668        encode_compound_hdr(xdr, req, &hdr);
2669        encode_sequence(xdr, &args->seq_args, &hdr);
2670        encode_putfh(xdr, args->fhandle, &hdr);
2671        encode_getfattr(xdr, args->bitmask, &hdr);
2672        encode_delegreturn(xdr, args->stateid, &hdr);
2673        encode_nops(&hdr);
2674}
2675
2676/*
2677 * Encode FS_LOCATIONS request
2678 */
2679static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2680                                      struct xdr_stream *xdr,
2681                                      struct nfs4_fs_locations_arg *args)
2682{
2683        struct compound_hdr hdr = {
2684                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2685        };
2686        uint32_t replen;
2687
2688        encode_compound_hdr(xdr, req, &hdr);
2689        encode_sequence(xdr, &args->seq_args, &hdr);
2690        encode_putfh(xdr, args->dir_fh, &hdr);
2691        encode_lookup(xdr, args->name, &hdr);
2692        replen = hdr.replen;    /* get the attribute into args->page */
2693        encode_fs_locations(xdr, args->bitmask, &hdr);
2694
2695        xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2696                        0, PAGE_SIZE);
2697        encode_nops(&hdr);
2698}
2699
2700/*
2701 * Encode SECINFO request
2702 */
2703static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2704                                struct xdr_stream *xdr,
2705                                struct nfs4_secinfo_arg *args)
2706{
2707        struct compound_hdr hdr = {
2708                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2709        };
2710
2711        encode_compound_hdr(xdr, req, &hdr);
2712        encode_sequence(xdr, &args->seq_args, &hdr);
2713        encode_putfh(xdr, args->dir_fh, &hdr);
2714        encode_secinfo(xdr, args->name, &hdr);
2715        encode_nops(&hdr);
2716}
2717
2718#if defined(CONFIG_NFS_V4_1)
2719/*
2720 * BIND_CONN_TO_SESSION request
2721 */
2722static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2723                                struct xdr_stream *xdr,
2724                                struct nfs_client *clp)
2725{
2726        struct compound_hdr hdr = {
2727                .minorversion = clp->cl_mvops->minor_version,
2728        };
2729
2730        encode_compound_hdr(xdr, req, &hdr);
2731        encode_bind_conn_to_session(xdr, clp->cl_session, &hdr);
2732        encode_nops(&hdr);
2733}
2734
2735/*
2736 * EXCHANGE_ID request
2737 */
2738static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2739                                     struct xdr_stream *xdr,
2740                                     struct nfs41_exchange_id_args *args)
2741{
2742        struct compound_hdr hdr = {
2743                .minorversion = args->client->cl_mvops->minor_version,
2744        };
2745
2746        encode_compound_hdr(xdr, req, &hdr);
2747        encode_exchange_id(xdr, args, &hdr);
2748        encode_nops(&hdr);
2749}
2750
2751/*
2752 * a CREATE_SESSION request
2753 */
2754static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2755                                        struct xdr_stream *xdr,
2756                                        struct nfs41_create_session_args *args)
2757{
2758        struct compound_hdr hdr = {
2759                .minorversion = args->client->cl_mvops->minor_version,
2760        };
2761
2762        encode_compound_hdr(xdr, req, &hdr);
2763        encode_create_session(xdr, args, &hdr);
2764        encode_nops(&hdr);
2765}
2766
2767/*
2768 * a DESTROY_SESSION request
2769 */
2770static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2771                                         struct xdr_stream *xdr,
2772                                         struct nfs4_session *session)
2773{
2774        struct compound_hdr hdr = {
2775                .minorversion = session->clp->cl_mvops->minor_version,
2776        };
2777
2778        encode_compound_hdr(xdr, req, &hdr);
2779        encode_destroy_session(xdr, session, &hdr);
2780        encode_nops(&hdr);
2781}
2782
2783/*
2784 * a DESTROY_CLIENTID request
2785 */
2786static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2787                                         struct xdr_stream *xdr,
2788                                         struct nfs_client *clp)
2789{
2790        struct compound_hdr hdr = {
2791                .minorversion = clp->cl_mvops->minor_version,
2792        };
2793
2794        encode_compound_hdr(xdr, req, &hdr);
2795        encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2796        encode_nops(&hdr);
2797}
2798
2799/*
2800 * a SEQUENCE request
2801 */
2802static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2803                                  struct nfs4_sequence_args *args)
2804{
2805        struct compound_hdr hdr = {
2806                .minorversion = nfs4_xdr_minorversion(args),
2807        };
2808
2809        encode_compound_hdr(xdr, req, &hdr);
2810        encode_sequence(xdr, args, &hdr);
2811        encode_nops(&hdr);
2812}
2813
2814/*
2815 * a GET_LEASE_TIME request
2816 */
2817static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2818                                        struct xdr_stream *xdr,
2819                                        struct nfs4_get_lease_time_args *args)
2820{
2821        struct compound_hdr hdr = {
2822                .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2823        };
2824        const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2825
2826        encode_compound_hdr(xdr, req, &hdr);
2827        encode_sequence(xdr, &args->la_seq_args, &hdr);
2828        encode_putrootfh(xdr, &hdr);
2829        encode_fsinfo(xdr, lease_bitmap, &hdr);
2830        encode_nops(&hdr);
2831}
2832
2833/*
2834 * a RECLAIM_COMPLETE request
2835 */
2836static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2837                                          struct xdr_stream *xdr,
2838                                struct nfs41_reclaim_complete_args *args)
2839{
2840        struct compound_hdr hdr = {
2841                .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2842        };
2843
2844        encode_compound_hdr(xdr, req, &hdr);
2845        encode_sequence(xdr, &args->seq_args, &hdr);
2846        encode_reclaim_complete(xdr, args, &hdr);
2847        encode_nops(&hdr);
2848}
2849
2850/*
2851 * Encode GETDEVICELIST request
2852 */
2853static void nfs4_xdr_enc_getdevicelist(struct rpc_rqst *req,
2854                                       struct xdr_stream *xdr,
2855                                       struct nfs4_getdevicelist_args *args)
2856{
2857        struct compound_hdr hdr = {
2858                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2859        };
2860
2861        encode_compound_hdr(xdr, req, &hdr);
2862        encode_sequence(xdr, &args->seq_args, &hdr);
2863        encode_putfh(xdr, args->fh, &hdr);
2864        encode_getdevicelist(xdr, args, &hdr);
2865        encode_nops(&hdr);
2866}
2867
2868/*
2869 * Encode GETDEVICEINFO request
2870 */
2871static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2872                                       struct xdr_stream *xdr,
2873                                       struct nfs4_getdeviceinfo_args *args)
2874{
2875        struct compound_hdr hdr = {
2876                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2877        };
2878
2879        encode_compound_hdr(xdr, req, &hdr);
2880        encode_sequence(xdr, &args->seq_args, &hdr);
2881        encode_getdeviceinfo(xdr, args, &hdr);
2882
2883        /* set up reply kvec. Subtract notification bitmap max size (2)
2884         * so that notification bitmap is put in xdr_buf tail */
2885        xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2886                         args->pdev->pages, args->pdev->pgbase,
2887                         args->pdev->pglen);
2888
2889        encode_nops(&hdr);
2890}
2891
2892/*
2893 *  Encode LAYOUTGET request
2894 */
2895static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2896                                   struct xdr_stream *xdr,
2897                                   struct nfs4_layoutget_args *args)
2898{
2899        struct compound_hdr hdr = {
2900                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2901        };
2902
2903        encode_compound_hdr(xdr, req, &hdr);
2904        encode_sequence(xdr, &args->seq_args, &hdr);
2905        encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2906        encode_layoutget(xdr, args, &hdr);
2907
2908        xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2909            args->layout.pages, 0, args->layout.pglen);
2910
2911        encode_nops(&hdr);
2912}
2913
2914/*
2915 *  Encode LAYOUTCOMMIT request
2916 */
2917static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2918                                      struct xdr_stream *xdr,
2919                                      struct nfs4_layoutcommit_args *args)
2920{
2921        struct nfs4_layoutcommit_data *data =
2922                container_of(args, struct nfs4_layoutcommit_data, args);
2923        struct compound_hdr hdr = {
2924                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2925        };
2926
2927        encode_compound_hdr(xdr, req, &hdr);
2928        encode_sequence(xdr, &args->seq_args, &hdr);
2929        encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2930        encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2931        encode_getfattr(xdr, args->bitmask, &hdr);
2932        encode_nops(&hdr);
2933}
2934
2935/*
2936 * Encode LAYOUTRETURN request
2937 */
2938static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2939                                      struct xdr_stream *xdr,
2940                                      struct nfs4_layoutreturn_args *args)
2941{
2942        struct compound_hdr hdr = {
2943                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2944        };
2945
2946        encode_compound_hdr(xdr, req, &hdr);
2947        encode_sequence(xdr, &args->seq_args, &hdr);
2948        encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2949        encode_layoutreturn(xdr, args, &hdr);
2950        encode_nops(&hdr);
2951}
2952
2953/*
2954 * Encode SECINFO_NO_NAME request
2955 */
2956static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
2957                                        struct xdr_stream *xdr,
2958                                        struct nfs41_secinfo_no_name_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_putrootfh(xdr, &hdr);
2967        encode_secinfo_no_name(xdr, args, &hdr);
2968        encode_nops(&hdr);
2969        return 0;
2970}
2971
2972/*
2973 *  Encode TEST_STATEID request
2974 */
2975static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
2976                                      struct xdr_stream *xdr,
2977                                      struct nfs41_test_stateid_args *args)
2978{
2979        struct compound_hdr hdr = {
2980                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2981        };
2982
2983        encode_compound_hdr(xdr, req, &hdr);
2984        encode_sequence(xdr, &args->seq_args, &hdr);
2985        encode_test_stateid(xdr, args, &hdr);
2986        encode_nops(&hdr);
2987}
2988
2989/*
2990 *  Encode FREE_STATEID request
2991 */
2992static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
2993                                     struct xdr_stream *xdr,
2994                                     struct nfs41_free_stateid_args *args)
2995{
2996        struct compound_hdr hdr = {
2997                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2998        };
2999
3000        encode_compound_hdr(xdr, req, &hdr);

3001        encode_sequence(xdr, &args->seq_args, &hdr);
3002        encode_free_stateid(xdr, args, &hdr);
3003        encode_nops(&hdr);
3004}
3005#endif /* CONFIG_NFS_V4_1 */
3006
3007static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
3008{
3009        dprintk("nfs: %s: prematurely hit end of receive buffer. "
3010                "Remaining buffer length is %tu words.\n",
3011                func, xdr->end - xdr->p);
3012}
3013
3014static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3015{
3016        __be32 *p;
3017
3018        p = xdr_inline_decode(xdr, 4);
3019        if (unlikely(!p))
3020                goto out_overflow;
3021        *len = be32_to_cpup(p);
3022        p = xdr_inline_decode(xdr, *len);
3023        if (unlikely(!p))
3024                goto out_overflow;
3025        *string = (char *)p;
3026        return 0;
3027out_overflow:
3028        print_overflow_msg(__func__, xdr);
3029        return -EIO;
3030}
3031
3032static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3033{
3034        __be32 *p;
3035
3036        p = xdr_inline_decode(xdr, 8);
3037        if (unlikely(!p))
3038                goto out_overflow;
3039        hdr->status = be32_to_cpup(p++);
3040        hdr->taglen = be32_to_cpup(p);
3041
3042        p = xdr_inline_decode(xdr, hdr->taglen + 4);
3043        if (unlikely(!p))
3044                goto out_overflow;
3045        hdr->tag = (char *)p;
3046        p += XDR_QUADLEN(hdr->taglen);
3047        hdr->nops = be32_to_cpup(p);
3048        if (unlikely(hdr->nops < 1))
3049                return nfs4_stat_to_errno(hdr->status);
3050        return 0;
3051out_overflow:
3052        print_overflow_msg(__func__, xdr);
3053        return -EIO;
3054}
3055
3056static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3057{
3058        __be32 *p;
3059        uint32_t opnum;
3060        int32_t nfserr;
3061
3062        p = xdr_inline_decode(xdr, 8);
3063        if (unlikely(!p))
3064                goto out_overflow;
3065        opnum = be32_to_cpup(p++);
3066        if (opnum != expected) {
3067                dprintk("nfs: Server returned operation"
3068                        " %d but we issued a request for %d\n",
3069                                opnum, expected);
3070                return -EIO;
3071        }
3072        nfserr = be32_to_cpup(p);
3073        if (nfserr != NFS_OK)
3074                return nfs4_stat_to_errno(nfserr);
3075        return 0;
3076out_overflow:
3077        print_overflow_msg(__func__, xdr);
3078        return -EIO;
3079}
3080
3081/* Dummy routine */
3082static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
3083{
3084        __be32 *p;
3085        unsigned int strlen;
3086        char *str;
3087
3088        p = xdr_inline_decode(xdr, 12);
3089        if (likely(p))
3090                return decode_opaque_inline(xdr, &strlen, &str);
3091        print_overflow_msg(__func__, xdr);
3092        return -EIO;
3093}
3094
3095static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3096{
3097        uint32_t bmlen;
3098        __be32 *p;
3099
3100        p = xdr_inline_decode(xdr, 4);
3101        if (unlikely(!p))
3102                goto out_overflow;
3103        bmlen = be32_to_cpup(p);
3104
3105        bitmap[0] = bitmap[1] = bitmap[2] = 0;
3106        p = xdr_inline_decode(xdr, (bmlen << 2));
3107        if (unlikely(!p))
3108                goto out_overflow;
3109        if (bmlen > 0) {
3110                bitmap[0] = be32_to_cpup(p++);
3111                if (bmlen > 1) {
3112                        bitmap[1] = be32_to_cpup(p++);
3113                        if (bmlen > 2)
3114                                bitmap[2] = be32_to_cpup(p);
3115                }
3116        }
3117        return 0;
3118out_overflow:
3119        print_overflow_msg(__func__, xdr);
3120        return -EIO;
3121}
3122
3123static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3124{
3125        __be32 *p;
3126
3127        p = xdr_inline_decode(xdr, 4);
3128        if (unlikely(!p))
3129                goto out_overflow;
3130        *attrlen = be32_to_cpup(p);
3131        *savep = xdr_stream_pos(xdr);
3132        return 0;
3133out_overflow:
3134        print_overflow_msg(__func__, xdr);
3135        return -EIO;
3136}
3137
3138static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3139{
3140        if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3141                int ret;
3142                ret = decode_attr_bitmap(xdr, bitmask);
3143                if (unlikely(ret < 0))
3144                        return ret;
3145                bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3146        } else
3147                bitmask[0] = bitmask[1] = bitmask[2] = 0;
3148        dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3149                bitmask[0], bitmask[1], bitmask[2]);
3150        return 0;
3151}
3152
3153static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3154{
3155        __be32 *p;
3156        int ret = 0;
3157
3158        *type = 0;
3159        if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3160                return -EIO;
3161        if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3162                p = xdr_inline_decode(xdr, 4);
3163                if (unlikely(!p))
3164                        goto out_overflow;
3165                *type = be32_to_cpup(p);
3166                if (*type < NF4REG || *type > NF4NAMEDATTR) {
3167                        dprintk("%s: bad type %d\n", __func__, *type);
3168                        return -EIO;
3169                }
3170                bitmap[0] &= ~FATTR4_WORD0_TYPE;
3171                ret = NFS_ATTR_FATTR_TYPE;
3172        }
3173        dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3174        return ret;
3175out_overflow:
3176        print_overflow_msg(__func__, xdr);
3177        return -EIO;
3178}
3179
3180static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3181                                      uint32_t *bitmap, uint32_t *type)
3182{
3183        __be32 *p;
3184
3185        *type = 0;
3186        if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3187                return -EIO;
3188        if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3189                p = xdr_inline_decode(xdr, 4);
3190                if (unlikely(!p))
3191                        goto out_overflow;
3192                *type = be32_to_cpup(p);
3193                bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3194        }
3195        dprintk("%s: expire type=0x%x\n", __func__, *type);
3196        return 0;
3197out_overflow:
3198        print_overflow_msg(__func__, xdr);
3199        return -EIO;
3200}
3201
3202static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3203{
3204        __be32 *p;
3205        int ret = 0;
3206
3207        *change = 0;
3208        if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3209                return -EIO;
3210        if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3211                p = xdr_inline_decode(xdr, 8);
3212                if (unlikely(!p))
3213                        goto out_overflow;
3214                xdr_decode_hyper(p, change);
3215                bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3216                ret = NFS_ATTR_FATTR_CHANGE;
3217        }
3218        dprintk("%s: change attribute=%Lu\n", __func__,
3219                        (unsigned long long)*change);
3220        return ret;
3221out_overflow:
3222        print_overflow_msg(__func__, xdr);
3223        return -EIO;
3224}
3225
3226static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3227{
3228        __be32 *p;
3229        int ret = 0;
3230
3231        *size = 0;
3232        if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3233                return -EIO;
3234        if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3235                p = xdr_inline_decode(xdr, 8);
3236                if (unlikely(!p))
3237                        goto out_overflow;
3238                xdr_decode_hyper(p, size);
3239                bitmap[0] &= ~FATTR4_WORD0_SIZE;
3240                ret = NFS_ATTR_FATTR_SIZE;
3241        }
3242        dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3243        return ret;
3244out_overflow:
3245        print_overflow_msg(__func__, xdr);
3246        return -EIO;
3247}
3248
3249static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3250{
3251        __be32 *p;
3252
3253        *res = 0;
3254        if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3255                return -EIO;
3256        if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3257                p = xdr_inline_decode(xdr, 4);
3258                if (unlikely(!p))
3259                        goto out_overflow;
3260                *res = be32_to_cpup(p);
3261                bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3262        }
3263        dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3264        return 0;
3265out_overflow:
3266        print_overflow_msg(__func__, xdr);
3267        return -EIO;
3268}
3269
3270static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3271{
3272        __be32 *p;
3273
3274        *res = 0;
3275        if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3276                return -EIO;
3277        if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3278                p = xdr_inline_decode(xdr, 4);
3279                if (unlikely(!p))
3280                        goto out_overflow;
3281                *res = be32_to_cpup(p);
3282                bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3283        }
3284        dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3285        return 0;
3286out_overflow:
3287        print_overflow_msg(__func__, xdr);
3288        return -EIO;
3289}
3290
3291static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3292{
3293        __be32 *p;
3294        int ret = 0;
3295
3296        fsid->major = 0;
3297        fsid->minor = 0;
3298        if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3299                return -EIO;
3300        if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3301                p = xdr_inline_decode(xdr, 16);
3302                if (unlikely(!p))
3303                        goto out_overflow;
3304                p = xdr_decode_hyper(p, &fsid->major);
3305                xdr_decode_hyper(p, &fsid->minor);
3306                bitmap[0] &= ~FATTR4_WORD0_FSID;
3307                ret = NFS_ATTR_FATTR_FSID;
3308        }
3309        dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3310                        (unsigned long long)fsid->major,
3311                        (unsigned long long)fsid->minor);
3312        return ret;
3313out_overflow:
3314        print_overflow_msg(__func__, xdr);
3315        return -EIO;
3316}
3317
3318static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3319{
3320        __be32 *p;
3321
3322        *res = 60;
3323        if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3324                return -EIO;
3325        if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3326                p = xdr_inline_decode(xdr, 4);
3327                if (unlikely(!p))
3328                        goto out_overflow;
3329                *res = be32_to_cpup(p);
3330                bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3331        }
3332        dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3333        return 0;
3334out_overflow:
3335        print_overflow_msg(__func__, xdr);
3336        return -EIO;
3337}
3338
3339static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3340{
3341        __be32 *p;
3342
3343        if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3344                return -EIO;
3345        if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3346                p = xdr_inline_decode(xdr, 4);
3347                if (unlikely(!p))
3348                        goto out_overflow;
3349                bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3350                *res = -be32_to_cpup(p);
3351        }
3352        return 0;
3353out_overflow:
3354        print_overflow_msg(__func__, xdr);
3355        return -EIO;
3356}
3357
3358static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3359{
3360        __be32 *p;
3361        int len;
3362
3363        if (fh != NULL)
3364                memset(fh, 0, sizeof(*fh));
3365
3366        if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3367                return -EIO;
3368        if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3369                p = xdr_inline_decode(xdr, 4);
3370                if (unlikely(!p))
3371                        goto out_overflow;
3372                len = be32_to_cpup(p);
3373                if (len > NFS4_FHSIZE)
3374                        return -EIO;
3375                p = xdr_inline_decode(xdr, len);
3376                if (unlikely(!p))
3377                        goto out_overflow;
3378                if (fh != NULL) {
3379                        memcpy(fh->data, p, len);
3380                        fh->size = len;
3381                }
3382                bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3383        }
3384        return 0;
3385out_overflow:
3386        print_overflow_msg(__func__, xdr);
3387        return -EIO;
3388}
3389
3390static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3391{
3392        __be32 *p;
3393
3394        *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
3395        if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3396                return -EIO;
3397        if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3398                p = xdr_inline_decode(xdr, 4);
3399                if (unlikely(!p))
3400                        goto out_overflow;
3401                *res = be32_to_cpup(p);
3402                bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3403        }
3404        dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3405        return 0;
3406out_overflow:
3407        print_overflow_msg(__func__, xdr);
3408        return -EIO;
3409}
3410
3411static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3412{
3413        __be32 *p;
3414        int ret = 0;
3415
3416        *fileid = 0;
3417        if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3418                return -EIO;
3419        if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3420                p = xdr_inline_decode(xdr, 8);
3421                if (unlikely(!p))
3422                        goto out_overflow;
3423                xdr_decode_hyper(p, fileid);
3424                bitmap[0] &= ~FATTR4_WORD0_FILEID;
3425                ret = NFS_ATTR_FATTR_FILEID;
3426        }
3427        dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3428        return ret;
3429out_overflow:
3430        print_overflow_msg(__func__, xdr);
3431        return -EIO;
3432}
3433
3434static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3435{
3436        __be32 *p;
3437        int ret = 0;
3438
3439        *fileid = 0;
3440        if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3441                return -EIO;
3442        if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3443                p = xdr_inline_decode(xdr, 8);
3444                if (unlikely(!p))
3445                        goto out_overflow;
3446                xdr_decode_hyper(p, fileid);
3447                bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3448                ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3449        }
3450        dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3451        return ret;
3452out_overflow:
3453        print_overflow_msg(__func__, xdr);
3454        return -EIO;
3455}
3456
3457static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3458{
3459        __be32 *p;
3460        int status = 0;
3461
3462        *res = 0;
3463        if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3464                return -EIO;
3465        if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3466                p = xdr_inline_decode(xdr, 8);
3467                if (unlikely(!p))
3468                        goto out_overflow;
3469                xdr_decode_hyper(p, res);
3470                bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3471        }
3472        dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3473        return status;
3474out_overflow:
3475        print_overflow_msg(__func__, xdr);
3476        return -EIO;
3477}
3478
3479static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3480{
3481        __be32 *p;
3482        int status = 0;
3483
3484        *res = 0;
3485        if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3486                return -EIO;
3487        if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3488                p = xdr_inline_decode(xdr, 8);
3489                if (unlikely(!p))
3490                        goto out_overflow;
3491                xdr_decode_hyper(p, res);
3492                bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3493        }
3494        dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3495        return status;
3496out_overflow:
3497        print_overflow_msg(__func__, xdr);
3498        return -EIO;
3499}
3500
3501static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3502{
3503        __be32 *p;
3504        int status = 0;
3505
3506        *res = 0;
3507        if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3508                return -EIO;
3509        if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3510                p = xdr_inline_decode(xdr, 8);
3511                if (unlikely(!p))
3512                        goto out_overflow;
3513                xdr_decode_hyper(p, res);
3514                bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3515        }
3516        dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3517        return status;
3518out_overflow:
3519        print_overflow_msg(__func__, xdr);
3520        return -EIO;
3521}
3522
3523static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3524{
3525        u32 n;
3526        __be32 *p;
3527        int status = 0;
3528
3529        p = xdr_inline_decode(xdr, 4);
3530        if (unlikely(!p))
3531                goto out_overflow;
3532        n = be32_to_cpup(p);
3533        if (n == 0)
3534                goto root_path;
3535        dprintk("pathname4: ");
3536        if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3537                dprintk("cannot parse %d components in path\n", n);
3538                goto out_eio;
3539        }
3540        for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3541                struct nfs4_string *component = &path->components[path->ncomponents];
3542                status = decode_opaque_inline(xdr, &component->len, &component->data);
3543                if (unlikely(status != 0))
3544                        goto out_eio;
3545                ifdebug (XDR)
3546                        pr_cont("%s%.*s ",
3547                                (path->ncomponents != n ? "/ " : ""),
3548                                component->len, component->data);
3549        }
3550out:
3551        return status;
3552root_path:
3553/* a root pathname is sent as a zero component4 */
3554        path->ncomponents = 1;
3555        path->components[0].len=0;
3556        path->components[0].data=NULL;
3557        dprintk("pathname4: /\n");
3558        goto out;
3559out_eio:
3560        dprintk(" status %d", status);
3561        status = -EIO;
3562        goto out;
3563out_overflow:
3564        print_overflow_msg(__func__, xdr);
3565        return -EIO;
3566}
3567
3568static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3569{
3570        int n;
3571        __be32 *p;
3572        int status = -EIO;
3573
3574        if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3575                goto out;
3576        status = 0;
3577        if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3578                goto out;
3579        status = -EIO;
3580        /* Ignore borken servers that return unrequested attrs */
3581        if (unlikely(res == NULL))
3582                goto out;
3583        dprintk("%s: fsroot:\n", __func__);
3584        status = decode_pathname(xdr, &res->fs_path);
3585        if (unlikely(status != 0))
3586                goto out;
3587        p = xdr_inline_decode(xdr, 4);
3588        if (unlikely(!p))
3589                goto out_overflow;
3590        n = be32_to_cpup(p);
3591        if (n <= 0)
3592                goto out_eio;
3593        for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3594                u32 m;
3595                struct nfs4_fs_location *loc;
3596
3597                if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3598                        break;
3599                loc = &res->locations[res->nlocations];
3600                p = xdr_inline_decode(xdr, 4);
3601                if (unlikely(!p))
3602                        goto out_overflow;
3603                m = be32_to_cpup(p);
3604
3605                dprintk("%s: servers:\n", __func__);
3606                for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3607                        struct nfs4_string *server;
3608
3609                        if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3610                                unsigned int i;
3611                                dprintk("%s: using first %u of %u servers "
3612                                        "returned for location %u\n",
3613                                                __func__,
3614                                                NFS4_FS_LOCATION_MAXSERVERS,
3615                                                m, res->nlocations);
3616                                for (i = loc->nservers; i < m; i++) {
3617                                        unsigned int len;
3618                                        char *data;
3619                                        status = decode_opaque_inline(xdr, &len, &data);
3620                                        if (unlikely(status != 0))
3621                                                goto out_eio;
3622                                }
3623                                break;
3624                        }
3625                        server = &loc->servers[loc->nservers];
3626                        status = decode_opaque_inline(xdr, &server->len, &server->data);
3627                        if (unlikely(status != 0))
3628                                goto out_eio;
3629                        dprintk("%s ", server->data);
3630                }
3631                status = decode_pathname(xdr, &loc->rootpath);
3632                if (unlikely(status != 0))
3633                        goto out_eio;
3634        }
3635        if (res->nlocations != 0)
3636                status = NFS_ATTR_FATTR_V4_LOCATIONS;
3637out:
3638        dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3639        return status;
3640out_overflow:
3641        print_overflow_msg(__func__, xdr);
3642out_eio:
3643        status = -EIO;
3644        goto out;
3645}
3646
3647static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3648{
3649        __be32 *p;
3650        int status = 0;
3651
3652        *res = 0;
3653        if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3654                return -EIO;
3655        if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3656                p = xdr_inline_decode(xdr, 8);
3657                if (unlikely(!p))
3658                        goto out_overflow;
3659                xdr_decode_hyper(p, res);
3660                bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3661        }
3662        dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3663        return status;
3664out_overflow:
3665        print_overflow_msg(__func__, xdr);
3666        return -EIO;
3667}
3668
3669static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3670{
3671        __be32 *p;
3672        int status = 0;
3673
3674        *maxlink = 1;
3675        if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3676                return -EIO;
3677        if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3678                p = xdr_inline_decode(xdr, 4);
3679                if (unlikely(!p))
3680                        goto out_overflow;
3681                *maxlink = be32_to_cpup(p);
3682                bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3683        }
3684        dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3685        return status;
3686out_overflow:
3687        print_overflow_msg(__func__, xdr);
3688        return -EIO;
3689}
3690
3691static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3692{
3693        __be32 *p;
3694        int status = 0;
3695
3696        *maxname = 1024;
3697        if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3698                return -EIO;
3699        if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3700                p = xdr_inline_decode(xdr, 4);
3701                if (unlikely(!p))
3702                        goto out_overflow;
3703                *maxname = be32_to_cpup(p);
3704                bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3705        }
3706        dprintk("%s: maxname=%u\n", __func__, *maxname);
3707        return status;
3708out_overflow:
3709        print_overflow_msg(__func__, xdr);
3710        return -EIO;
3711}
3712
3713static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3714{
3715        __be32 *p;
3716        int status = 0;
3717
3718        *res = 1024;
3719        if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3720                return -EIO;
3721        if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3722                uint64_t maxread;
3723                p = xdr_inline_decode(xdr, 8);
3724                if (unlikely(!p))
3725                        goto out_overflow;
3726                xdr_decode_hyper(p, &maxread);
3727                if (maxread > 0x7FFFFFFF)
3728                        maxread = 0x7FFFFFFF;
3729                *res = (uint32_t)maxread;
3730                bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3731        }
3732        dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3733        return status;
3734out_overflow:
3735        print_overflow_msg(__func__, xdr);
3736        return -EIO;
3737}
3738
3739static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3740{
3741        __be32 *p;
3742        int status = 0;
3743
3744        *res = 1024;
3745        if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3746                return -EIO;
3747        if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3748                uint64_t maxwrite;
3749                p = xdr_inline_decode(xdr, 8);
3750                if (unlikely(!p))
3751                        goto out_overflow;
3752                xdr_decode_hyper(p, &maxwrite);
3753                if (maxwrite > 0x7FFFFFFF)
3754                        maxwrite = 0x7FFFFFFF;
3755                *res = (uint32_t)maxwrite;
3756                bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3757        }
3758        dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3759        return status;
3760out_overflow:
3761        print_overflow_msg(__func__, xdr);
3762        return -EIO;
3763}
3764
3765static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3766{
3767        uint32_t tmp;
3768        __be32 *p;
3769        int ret = 0;
3770
3771        *mode = 0;
3772        if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3773                return -EIO;
3774        if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3775                p = xdr_inline_decode(xdr, 4);
3776                if (unlikely(!p))
3777                        goto out_overflow;
3778                tmp = be32_to_cpup(p);
3779                *mode = tmp & ~S_IFMT;
3780                bitmap[1] &= ~FATTR4_WORD1_MODE;
3781                ret = NFS_ATTR_FATTR_MODE;
3782        }
3783        dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3784        return ret;
3785out_overflow:
3786        print_overflow_msg(__func__, xdr);
3787        return -EIO;
3788}
3789
3790static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3791{
3792        __be32 *p;
3793        int ret = 0;
3794
3795        *nlink = 1;
3796        if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3797                return -EIO;
3798        if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3799                p = xdr_inline_decode(xdr, 4);
3800                if (unlikely(!p))
3801                        goto out_overflow;
3802                *nlink = be32_to_cpup(p);
3803                bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3804                ret = NFS_ATTR_FATTR_NLINK;
3805        }
3806        dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3807        return ret;
3808out_overflow:
3809        print_overflow_msg(__func__, xdr);
3810        return -EIO;
3811}
3812
3813static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3814                const struct nfs_server *server, kuid_t *uid,
3815                struct nfs4_string *owner_name)
3816{
3817        uint32_t len;
3818        __be32 *p;
3819        int ret = 0;
3820
3821        *uid = make_kuid(&init_user_ns, -2);
3822        if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3823                return -EIO;
3824        if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3825                p = xdr_inline_decode(xdr, 4);
3826                if (unlikely(!p))
3827                        goto out_overflow;
3828                len = be32_to_cpup(p);
3829                p = xdr_inline_decode(xdr, len);
3830                if (unlikely(!p))
3831                        goto out_overflow;
3832                if (owner_name != NULL) {
3833                        owner_name->data = kmemdup(p, len, GFP_NOWAIT);
3834                        if (owner_name->data != NULL) {
3835                                owner_name->len = len;
3836                                ret = NFS_ATTR_FATTR_OWNER_NAME;
3837                        }
3838                } else if (len < XDR_MAX_NETOBJ) {
3839                        if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3840                                ret = NFS_ATTR_FATTR_OWNER;
3841                        else
3842                                dprintk("%s: nfs_map_name_to_uid failed!\n",
3843                                                __func__);
3844                } else
3845                        dprintk("%s: name too long (%u)!\n",
3846                                        __func__, len);
3847                bitmap[1] &= ~FATTR4_WORD1_OWNER;
3848        }
3849        dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3850        return ret;
3851out_overflow:
3852        print_overflow_msg(__func__, xdr);
3853        return -EIO;
3854}
3855
3856static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3857                const struct nfs_server *server, kgid_t *gid,
3858                struct nfs4_string *group_name)
3859{
3860        uint32_t len;
3861        __be32 *p;
3862        int ret = 0;
3863
3864        *gid = make_kgid(&init_user_ns, -2);
3865        if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3866                return -EIO;
3867        if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3868                p = xdr_inline_decode(xdr, 4);
3869                if (unlikely(!p))
3870                        goto out_overflow;
3871                len = be32_to_cpup(p);
3872                p = xdr_inline_decode(xdr, len);
3873                if (unlikely(!p))
3874                        goto out_overflow;
3875                if (group_name != NULL) {
3876                        group_name->data = kmemdup(p, len, GFP_NOWAIT);
3877                        if (group_name->data != NULL) {
3878                                group_name->len = len;
3879                                ret = NFS_ATTR_FATTR_GROUP_NAME;
3880                        }
3881                } else if (len < XDR_MAX_NETOBJ) {
3882                        if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3883                                ret = NFS_ATTR_FATTR_GROUP;
3884                        else
3885                                dprintk("%s: nfs_map_group_to_gid failed!\n",
3886                                                __func__);
3887                } else
3888                        dprintk("%s: name too long (%u)!\n",
3889                                        __func__, len);
3890                bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3891        }
3892        dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3893        return ret;
3894out_overflow:
3895        print_overflow_msg(__func__, xdr);
3896        return -EIO;
3897}
3898
3899static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3900{
3901        uint32_t major = 0, minor = 0;
3902        __be32 *p;
3903        int ret = 0;
3904
3905        *rdev = MKDEV(0,0);
3906        if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3907                return -EIO;
3908        if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3909                dev_t tmp;
3910
3911                p = xdr_inline_decode(xdr, 8);
3912                if (unlikely(!p))
3913                        goto out_overflow;
3914                major = be32_to_cpup(p++);
3915                minor = be32_to_cpup(p);
3916                tmp = MKDEV(major, minor);
3917                if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3918                        *rdev = tmp;
3919                bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3920                ret = NFS_ATTR_FATTR_RDEV;
3921        }
3922        dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3923        return ret;
3924out_overflow:
3925        print_overflow_msg(__func__, xdr);
3926        return -EIO;
3927}
3928
3929static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3930{
3931        __be32 *p;
3932        int status = 0;
3933
3934        *res = 0;
3935        if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3936                return -EIO;
3937        if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3938                p = xdr_inline_decode(xdr, 8);
3939                if (unlikely(!p))
3940                        goto out_overflow;
3941                xdr_decode_hyper(p, res);
3942                bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3943        }
3944        dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3945        return status;
3946out_overflow:
3947        print_overflow_msg(__func__, xdr);
3948        return -EIO;
3949}
3950
3951static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3952{
3953        __be32 *p;
3954        int status = 0;
3955
3956        *res = 0;
3957        if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3958                return -EIO;
3959        if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3960                p = xdr_inline_decode(xdr, 8);
3961                if (unlikely(!p))
3962                        goto out_overflow;
3963                xdr_decode_hyper(p, res);
3964                bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3965        }
3966        dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3967        return status;
3968out_overflow:
3969        print_overflow_msg(__func__, xdr);
3970        return -EIO;
3971}
3972
3973static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3974{
3975        __be32 *p;
3976        int status = 0;
3977
3978        *res = 0;
3979        if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3980                return -EIO;
3981        if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3982                p = xdr_inline_decode(xdr, 8);
3983                if (unlikely(!p))
3984                        goto out_overflow;
3985                xdr_decode_hyper(p, res);
3986                bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3987        }
3988        dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3989        return status;
3990out_overflow:
3991        print_overflow_msg(__func__, xdr);
3992        return -EIO;
3993}
3994
3995static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3996{
3997        __be32 *p;
3998        int ret = 0;
3999
4000        *used = 0;

4001        if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4002                return -EIO;
4003        if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4004                p = xdr_inline_decode(xdr, 8);
4005                if (unlikely(!p))
4006                        goto out_overflow;
4007                xdr_decode_hyper(p, used);
4008                bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4009                ret = NFS_ATTR_FATTR_SPACE_USED;
4010        }
4011        dprintk("%s: space used=%Lu\n", __func__,
4012                        (unsigned long long)*used);
4013        return ret;
4014out_overflow:
4015        print_overflow_msg(__func__, xdr);
4016        return -EIO;
4017}
4018
4019static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
4020{
4021        __be32 *p;
4022        uint64_t sec;
4023        uint32_t nsec;
4024
4025        p = xdr_inline_decode(xdr, 12);
4026        if (unlikely(!p))
4027                goto out_overflow;
4028        p = xdr_decode_hyper(p, &sec);
4029        nsec = be32_to_cpup(p);
4030        time->tv_sec = (time_t)sec;
4031        time->tv_nsec = (long)nsec;
4032        return 0;
4033out_overflow:
4034        print_overflow_msg(__func__, xdr);
4035        return -EIO;
4036}
4037
4038static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4039{
4040        int status = 0;
4041
4042        time->tv_sec = 0;
4043        time->tv_nsec = 0;
4044        if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4045                return -EIO;
4046        if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4047                status = decode_attr_time(xdr, time);
4048                if (status == 0)
4049                        status = NFS_ATTR_FATTR_ATIME;
4050                bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4051        }
4052        dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4053        return status;
4054}
4055
4056static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4057{
4058        int status = 0;
4059
4060        time->tv_sec = 0;
4061        time->tv_nsec = 0;
4062        if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4063                return -EIO;
4064        if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4065                status = decode_attr_time(xdr, time);
4066                if (status == 0)
4067                        status = NFS_ATTR_FATTR_CTIME;
4068                bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4069        }
4070        dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4071        return status;
4072}
4073
4074static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4075                                  struct timespec *time)
4076{
4077        int status = 0;
4078
4079        time->tv_sec = 0;
4080        time->tv_nsec = 0;
4081        if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4082                return -EIO;
4083        if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4084                status = decode_attr_time(xdr, time);
4085                bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4086        }
4087        dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4088                (long)time->tv_nsec);
4089        return status;
4090}
4091
4092static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4093                                        struct nfs4_label *label)
4094{
4095        uint32_t pi = 0;
4096        uint32_t lfs = 0;
4097        __u32 len;
4098        __be32 *p;
4099        int status = 0;
4100
4101        if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4102                return -EIO;
4103        if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4104                p = xdr_inline_decode(xdr, 4);
4105                if (unlikely(!p))
4106                        goto out_overflow;
4107                lfs = be32_to_cpup(p++);
4108                p = xdr_inline_decode(xdr, 4);
4109                if (unlikely(!p))
4110                        goto out_overflow;
4111                pi = be32_to_cpup(p++);
4112                p = xdr_inline_decode(xdr, 4);
4113                if (unlikely(!p))
4114                        goto out_overflow;
4115                len = be32_to_cpup(p++);
4116                p = xdr_inline_decode(xdr, len);
4117                if (unlikely(!p))
4118                        goto out_overflow;
4119                if (len < NFS4_MAXLABELLEN) {
4120                        if (label) {
4121                                memcpy(label->label, p, len);
4122                                label->len = len;
4123                                label->pi = pi;
4124                                label->lfs = lfs;
4125                                status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4126                        }
4127                        bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4128                } else
4129                        printk(KERN_WARNING "%s: label too long (%u)!\n",
4130                                        __func__, len);
4131        }
4132        if (label && label->label)
4133                dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4134                        (char *)label->label, label->len, label->pi, label->lfs);
4135        return status;
4136
4137out_overflow:
4138        print_overflow_msg(__func__, xdr);
4139        return -EIO;
4140}
4141
4142static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4143{
4144        int status = 0;
4145
4146        time->tv_sec = 0;
4147        time->tv_nsec = 0;
4148        if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4149                return -EIO;
4150        if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4151                status = decode_attr_time(xdr, time);
4152                if (status == 0)
4153                        status = NFS_ATTR_FATTR_MTIME;
4154                bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4155        }
4156        dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4157        return status;
4158}
4159
4160static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4161{
4162        unsigned int attrwords = XDR_QUADLEN(attrlen);
4163        unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4164
4165        if (unlikely(attrwords != nwords)) {
4166                dprintk("%s: server returned incorrect attribute length: "
4167                        "%u %c %u\n",
4168                                __func__,
4169                                attrwords << 2,
4170                                (attrwords < nwords) ? '<' : '>',
4171                                nwords << 2);
4172                return -EIO;
4173        }
4174        return 0;
4175}
4176
4177static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4178{
4179        __be32 *p;
4180
4181        p = xdr_inline_decode(xdr, 20);
4182        if (unlikely(!p))
4183                goto out_overflow;
4184        cinfo->atomic = be32_to_cpup(p++);
4185        p = xdr_decode_hyper(p, &cinfo->before);
4186        xdr_decode_hyper(p, &cinfo->after);
4187        return 0;
4188out_overflow:
4189        print_overflow_msg(__func__, xdr);
4190        return -EIO;
4191}
4192
4193static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4194{
4195        __be32 *p;
4196        uint32_t supp, acc;
4197        int status;
4198
4199        status = decode_op_hdr(xdr, OP_ACCESS);
4200        if (status)
4201                return status;
4202        p = xdr_inline_decode(xdr, 8);
4203        if (unlikely(!p))
4204                goto out_overflow;
4205        supp = be32_to_cpup(p++);
4206        acc = be32_to_cpup(p);
4207        *supported = supp;
4208        *access = acc;
4209        return 0;
4210out_overflow:
4211        print_overflow_msg(__func__, xdr);
4212        return -EIO;
4213}
4214
4215static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4216{
4217        __be32 *p;
4218
4219        p = xdr_inline_decode(xdr, len);
4220        if (likely(p)) {
4221                memcpy(buf, p, len);
4222                return 0;
4223        }
4224        print_overflow_msg(__func__, xdr);
4225        return -EIO;
4226}
4227
4228static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4229{
4230        return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4231}
4232
4233static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4234{
4235        int status;
4236
4237        status = decode_op_hdr(xdr, OP_CLOSE);
4238        if (status != -EIO)
4239                nfs_increment_open_seqid(status, res->seqid);
4240        if (!status)
4241                status = decode_stateid(xdr, &res->stateid);
4242        return status;
4243}
4244
4245static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4246{
4247        return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4248}
4249
4250static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4251{
4252        return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4253}
4254
4255static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4256{
4257        int status;
4258
4259        status = decode_op_hdr(xdr, OP_COMMIT);
4260        if (!status)
4261                status = decode_write_verifier(xdr, &res->verf->verifier);
4262        return status;
4263}
4264
4265static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4266{
4267        __be32 *p;
4268        uint32_t bmlen;
4269        int status;
4270
4271        status = decode_op_hdr(xdr, OP_CREATE);
4272        if (status)
4273                return status;
4274        if ((status = decode_change_info(xdr, cinfo)))
4275                return status;
4276        p = xdr_inline_decode(xdr, 4);
4277        if (unlikely(!p))
4278                goto out_overflow;
4279        bmlen = be32_to_cpup(p);
4280        p = xdr_inline_decode(xdr, bmlen << 2);
4281        if (likely(p))
4282                return 0;
4283out_overflow:
4284        print_overflow_msg(__func__, xdr);
4285        return -EIO;
4286}
4287
4288static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4289{
4290        unsigned int savep;
4291        uint32_t attrlen, bitmap[3] = {0};
4292        int status;
4293
4294        if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4295                goto xdr_error;
4296        if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4297                goto xdr_error;
4298        if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4299                goto xdr_error;
4300        if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4301                goto xdr_error;
4302        if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4303                                                 &res->fh_expire_type)) != 0)
4304                goto xdr_error;
4305        if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4306                goto xdr_error;
4307        if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4308                goto xdr_error;
4309        if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4310                goto xdr_error;
4311        status = verify_attr_len(xdr, savep, attrlen);
4312xdr_error:
4313        dprintk("%s: xdr returned %d!\n", __func__, -status);
4314        return status;
4315}
4316
4317static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4318{
4319        unsigned int savep;
4320        uint32_t attrlen, bitmap[3] = {0};
4321        int status;
4322
4323        if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4324                goto xdr_error;
4325        if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4326                goto xdr_error;
4327        if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4328                goto xdr_error;
4329
4330        if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4331                goto xdr_error;
4332        if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4333                goto xdr_error;
4334        if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4335                goto xdr_error;
4336        if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4337                goto xdr_error;
4338        if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4339                goto xdr_error;
4340        if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4341                goto xdr_error;
4342
4343        status = verify_attr_len(xdr, savep, attrlen);
4344xdr_error:
4345        dprintk("%s: xdr returned %d!\n", __func__, -status);
4346        return status;
4347}
4348
4349static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4350{
4351        unsigned int savep;
4352        uint32_t attrlen, bitmap[3] = {0};
4353        int status;
4354
4355        if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4356                goto xdr_error;
4357        if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4358                goto xdr_error;
4359        if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4360                goto xdr_error;
4361
4362        if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4363                goto xdr_error;
4364        if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4365                goto xdr_error;
4366
4367        status = verify_attr_len(xdr, savep, attrlen);
4368xdr_error:
4369        dprintk("%s: xdr returned %d!\n", __func__, -status);
4370        return status;
4371}
4372
4373static int decode_threshold_hint(struct xdr_stream *xdr,
4374                                  uint32_t *bitmap,
4375                                  uint64_t *res,
4376                                  uint32_t hint_bit)
4377{
4378        __be32 *p;
4379
4380        *res = 0;
4381        if (likely(bitmap[0] & hint_bit)) {
4382                p = xdr_inline_decode(xdr, 8);
4383                if (unlikely(!p))
4384                        goto out_overflow;
4385                xdr_decode_hyper(p, res);
4386        }
4387        return 0;
4388out_overflow:
4389        print_overflow_msg(__func__, xdr);
4390        return -EIO;
4391}
4392
4393static int decode_first_threshold_item4(struct xdr_stream *xdr,
4394                                        struct nfs4_threshold *res)
4395{
4396        __be32 *p;
4397        unsigned int savep;
4398        uint32_t bitmap[3] = {0,}, attrlen;
4399        int status;
4400
4401        /* layout type */
4402        p = xdr_inline_decode(xdr, 4);
4403        if (unlikely(!p)) {
4404                print_overflow_msg(__func__, xdr);
4405                return -EIO;
4406        }
4407        res->l_type = be32_to_cpup(p);
4408
4409        /* thi_hintset bitmap */
4410        status = decode_attr_bitmap(xdr, bitmap);
4411        if (status < 0)
4412                goto xdr_error;
4413
4414        /* thi_hintlist length */
4415        status = decode_attr_length(xdr, &attrlen, &savep);
4416        if (status < 0)
4417                goto xdr_error;
4418        /* thi_hintlist */
4419        status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4420        if (status < 0)
4421                goto xdr_error;
4422        status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4423        if (status < 0)
4424                goto xdr_error;
4425        status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4426                                       THRESHOLD_RD_IO);
4427        if (status < 0)
4428                goto xdr_error;
4429        status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4430                                       THRESHOLD_WR_IO);
4431        if (status < 0)
4432                goto xdr_error;
4433
4434        status = verify_attr_len(xdr, savep, attrlen);
4435        res->bm = bitmap[0];
4436
4437        dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4438                 __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4439                res->wr_io_sz);
4440xdr_error:
4441        dprintk("%s ret=%d!\n", __func__, status);
4442        return status;
4443}
4444
4445/*
4446 * Thresholds on pNFS direct I/O vrs MDS I/O
4447 */
4448static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4449                                    uint32_t *bitmap,
4450                                    struct nfs4_threshold *res)
4451{
4452        __be32 *p;
4453        int status = 0;
4454        uint32_t num;
4455
4456        if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4457                return -EIO;
4458        if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4459                /* Did the server return an unrequested attribute? */
4460                if (unlikely(res == NULL))
4461                        return -EREMOTEIO;
4462                p = xdr_inline_decode(xdr, 4);
4463                if (unlikely(!p))
4464                        goto out_overflow;
4465                num = be32_to_cpup(p);
4466                if (num == 0)
4467                        return 0;
4468                if (num > 1)
4469                        printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4470                                "drivers per filesystem not supported\n",
4471                                __func__);
4472
4473                status = decode_first_threshold_item4(xdr, res);
4474                bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4475        }
4476        return status;
4477out_overflow:
4478        print_overflow_msg(__func__, xdr);
4479        return -EIO;
4480}
4481
4482static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4483                struct nfs_fattr *fattr, struct nfs_fh *fh,
4484                struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4485                const struct nfs_server *server)
4486{
4487        int status;
4488        umode_t fmode = 0;
4489        uint32_t type;
4490        int32_t err;
4491
4492        status = decode_attr_type(xdr, bitmap, &type);
4493        if (status < 0)
4494                goto xdr_error;
4495        fattr->mode = 0;
4496        if (status != 0) {
4497                fattr->mode |= nfs_type2fmt[type];
4498                fattr->valid |= status;
4499        }
4500
4501        status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4502        if (status < 0)
4503                goto xdr_error;
4504        fattr->valid |= status;
4505
4506        status = decode_attr_size(xdr, bitmap, &fattr->size);
4507        if (status < 0)
4508                goto xdr_error;
4509        fattr->valid |= status;
4510
4511        status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4512        if (status < 0)
4513                goto xdr_error;
4514        fattr->valid |= status;
4515
4516        err = 0;
4517        status = decode_attr_error(xdr, bitmap, &err);
4518        if (status < 0)
4519                goto xdr_error;
4520
4521        status = decode_attr_filehandle(xdr, bitmap, fh);
4522        if (status < 0)
4523                goto xdr_error;
4524
4525        status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4526        if (status < 0)
4527                goto xdr_error;
4528        fattr->valid |= status;
4529
4530        status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4531        if (status < 0)
4532                goto xdr_error;
4533        fattr->valid |= status;
4534
4535        status = decode_attr_mode(xdr, bitmap, &fmode);
4536        if (status < 0)
4537                goto xdr_error;
4538        if (status != 0) {
4539                fattr->mode |= fmode;
4540                fattr->valid |= status;
4541        }
4542
4543        status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4544        if (status < 0)
4545                goto xdr_error;
4546        fattr->valid |= status;
4547
4548        status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4549        if (status < 0)
4550                goto xdr_error;
4551        fattr->valid |= status;
4552
4553        status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4554        if (status < 0)
4555                goto xdr_error;
4556        fattr->valid |= status;
4557
4558        status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4559        if (status < 0)
4560                goto xdr_error;
4561        fattr->valid |= status;
4562
4563        status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4564        if (status < 0)
4565                goto xdr_error;
4566        fattr->valid |= status;
4567
4568        status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4569        if (status < 0)
4570                goto xdr_error;
4571        fattr->valid |= status;
4572
4573        status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4574        if (status < 0)
4575                goto xdr_error;
4576        fattr->valid |= status;
4577
4578        status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4579        if (status < 0)
4580                goto xdr_error;
4581        fattr->valid |= status;
4582
4583        status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4584        if (status < 0)
4585                goto xdr_error;
4586        fattr->valid |= status;
4587
4588        status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4589        if (status < 0)
4590                goto xdr_error;
4591
4592        if (label) {
4593                status = decode_attr_security_label(xdr, bitmap, label);
4594                if (status < 0)
4595                        goto xdr_error;
4596                fattr->valid |= status;
4597        }
4598
4599xdr_error:
4600        dprintk("%s: xdr returned %d\n", __func__, -status);
4601        return status;
4602}
4603
4604static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4605                struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4606                struct nfs4_label *label, const struct nfs_server *server)
4607{
4608        unsigned int savep;
4609        uint32_t attrlen,
4610                 bitmap[3] = {0};
4611        int status;
4612
4613        status = decode_op_hdr(xdr, OP_GETATTR);
4614        if (status < 0)
4615                goto xdr_error;
4616
4617        status = decode_attr_bitmap(xdr, bitmap);
4618        if (status < 0)
4619                goto xdr_error;
4620
4621        status = decode_attr_length(xdr, &attrlen, &savep);
4622        if (status < 0)
4623                goto xdr_error;
4624
4625        status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4626                                        label, server);
4627        if (status < 0)
4628                goto xdr_error;
4629
4630        status = verify_attr_len(xdr, savep, attrlen);
4631xdr_error:
4632        dprintk("%s: xdr returned %d\n", __func__, -status);
4633        return status;
4634}
4635
4636static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4637                struct nfs4_label *label, const struct nfs_server *server)
4638{
4639        return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4640}
4641
4642static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4643                const struct nfs_server *server)
4644{
4645        return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4646}
4647
4648/*
4649 * Decode potentially multiple layout types. Currently we only support
4650 * one layout driver per file system.
4651 */
4652static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4653                                         uint32_t *layouttype)
4654{
4655        __be32 *p;
4656        int num;
4657
4658        p = xdr_inline_decode(xdr, 4);
4659        if (unlikely(!p))
4660                goto out_overflow;
4661        num = be32_to_cpup(p);
4662
4663        /* pNFS is not supported by the underlying file system */
4664        if (num == 0) {
4665                *layouttype = 0;
4666                return 0;
4667        }
4668        if (num > 1)
4669                printk(KERN_INFO "NFS: %s: Warning: Multiple pNFS layout "
4670                        "drivers per filesystem not supported\n", __func__);
4671
4672        /* Decode and set first layout type, move xdr->p past unused types */
4673        p = xdr_inline_decode(xdr, num * 4);
4674        if (unlikely(!p))
4675                goto out_overflow;
4676        *layouttype = be32_to_cpup(p);
4677        return 0;
4678out_overflow:
4679        print_overflow_msg(__func__, xdr);
4680        return -EIO;
4681}
4682
4683/*
4684 * The type of file system exported.
4685 * Note we must ensure that layouttype is set in any non-error case.
4686 */
4687static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4688                                uint32_t *layouttype)
4689{
4690        int status = 0;
4691
4692        dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4693        if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4694                return -EIO;
4695        if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4696                status = decode_first_pnfs_layout_type(xdr, layouttype);
4697                bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4698        } else
4699                *layouttype = 0;
4700        return status;
4701}
4702
4703/*
4704 * The prefered block size for layout directed io
4705 */
4706static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4707                                      uint32_t *res)
4708{
4709        __be32 *p;
4710
4711        dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4712        *res = 0;
4713        if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4714                p = xdr_inline_decode(xdr, 4);
4715                if (unlikely(!p)) {
4716                        print_overflow_msg(__func__, xdr);
4717                        return -EIO;
4718                }
4719                *res = be32_to_cpup(p);
4720                bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4721        }
4722        return 0;
4723}
4724
4725static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4726{
4727        unsigned int savep;
4728        uint32_t attrlen, bitmap[3];
4729        int status;
4730
4731        if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4732                goto xdr_error;
4733        if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4734                goto xdr_error;
4735        if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4736                goto xdr_error;
4737
4738        fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4739
4740        if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4741                goto xdr_error;
4742        if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4743                goto xdr_error;
4744        if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4745                goto xdr_error;
4746        fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4747        if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4748                goto xdr_error;
4749        fsinfo->wtpref = fsinfo->wtmax;
4750        status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4751        if (status != 0)
4752                goto xdr_error;
4753        status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4754        if (status != 0)
4755                goto xdr_error;
4756        status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4757        if (status)
4758                goto xdr_error;
4759
4760        status = verify_attr_len(xdr, savep, attrlen);
4761xdr_error:
4762        dprintk("%s: xdr returned %d!\n", __func__, -status);
4763        return status;
4764}
4765
4766static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4767{
4768        __be32 *p;
4769        uint32_t len;
4770        int status;
4771
4772        /* Zero handle first to allow comparisons */
4773        memset(fh, 0, sizeof(*fh));
4774
4775        status = decode_op_hdr(xdr, OP_GETFH);
4776        if (status)
4777                return status;
4778
4779        p = xdr_inline_decode(xdr, 4);
4780        if (unlikely(!p))
4781                goto out_overflow;
4782        len = be32_to_cpup(p);
4783        if (len > NFS4_FHSIZE)
4784                return -EIO;
4785        fh->size = len;
4786        p = xdr_inline_decode(xdr, len);
4787        if (unlikely(!p))
4788                goto out_overflow;
4789        memcpy(fh->data, p, len);
4790        return 0;
4791out_overflow:
4792        print_overflow_msg(__func__, xdr);
4793        return -EIO;
4794}
4795
4796static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4797{
4798        int status;
4799
4800        status = decode_op_hdr(xdr, OP_LINK);
4801        if (status)
4802                return status;
4803        return decode_change_info(xdr, cinfo);
4804}
4805
4806/*
4807 * We create the owner, so we know a proper owner.id length is 4.
4808 */
4809static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4810{
4811        uint64_t offset, length, clientid;
4812        __be32 *p;
4813        uint32_t namelen, type;
4814
4815        p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4816        if (unlikely(!p))
4817                goto out_overflow;
4818        p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4819        p = xdr_decode_hyper(p, &length);
4820        type = be32_to_cpup(p++); /* 4 byte read */
4821        if (fl != NULL) { /* manipulate file lock */
4822                fl->fl_start = (loff_t)offset;
4823                fl->fl_end = fl->fl_start + (loff_t)length - 1;
4824                if (length == ~(uint64_t)0)
4825                        fl->fl_end = OFFSET_MAX;
4826                fl->fl_type = F_WRLCK;
4827                if (type & 1)
4828                        fl->fl_type = F_RDLCK;
4829                fl->fl_pid = 0;
4830        }
4831        p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4832        namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4833        p = xdr_inline_decode(xdr, namelen); /* variable size field */
4834        if (likely(p))
4835                return -NFS4ERR_DENIED;
4836out_overflow:
4837        print_overflow_msg(__func__, xdr);
4838        return -EIO;
4839}
4840
4841static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4842{
4843        int status;
4844
4845        status = decode_op_hdr(xdr, OP_LOCK);
4846        if (status == -EIO)
4847                goto out;
4848        if (status == 0) {
4849                status = decode_stateid(xdr, &res->stateid);
4850                if (unlikely(status))
4851                        goto out;
4852        } else if (status == -NFS4ERR_DENIED)
4853                status = decode_lock_denied(xdr, NULL);
4854        if (res->open_seqid != NULL)
4855                nfs_increment_open_seqid(status, res->open_seqid);
4856        nfs_increment_lock_seqid(status, res->lock_seqid);
4857out:
4858        return status;
4859}
4860
4861static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4862{
4863        int status;
4864        status = decode_op_hdr(xdr, OP_LOCKT);
4865        if (status == -NFS4ERR_DENIED)
4866                return decode_lock_denied(xdr, res->denied);
4867        return status;
4868}
4869
4870static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4871{
4872        int status;
4873
4874        status = decode_op_hdr(xdr, OP_LOCKU);
4875        if (status != -EIO)
4876                nfs_increment_lock_seqid(status, res->seqid);
4877        if (status == 0)
4878                status = decode_stateid(xdr, &res->stateid);
4879        return status;
4880}
4881
4882static int decode_release_lockowner(struct xdr_stream *xdr)
4883{
4884        return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4885}
4886
4887static int decode_lookup(struct xdr_stream *xdr)
4888{
4889        return decode_op_hdr(xdr, OP_LOOKUP);
4890}
4891
4892/* This is too sick! */
4893static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4894{
4895        __be32 *p;
4896        uint32_t limit_type, nblocks, blocksize;
4897
4898        p = xdr_inline_decode(xdr, 12);
4899        if (unlikely(!p))
4900                goto out_overflow;
4901        limit_type = be32_to_cpup(p++);
4902        switch (limit_type) {
4903        case 1:
4904                xdr_decode_hyper(p, maxsize);
4905                break;
4906        case 2:
4907                nblocks = be32_to_cpup(p++);
4908                blocksize = be32_to_cpup(p);
4909                *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4910        }
4911        return 0;
4912out_overflow:
4913        print_overflow_msg(__func__, xdr);
4914        return -EIO;
4915}
4916
4917static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4918{
4919        __be32 *p;
4920        uint32_t delegation_type;
4921        int status;
4922
4923        p = xdr_inline_decode(xdr, 4);
4924        if (unlikely(!p))
4925                goto out_overflow;
4926        delegation_type = be32_to_cpup(p);
4927        if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4928                res->delegation_type = 0;
4929                return 0;
4930        }
4931        status = decode_stateid(xdr, &res->delegation);
4932        if (unlikely(status))
4933                return status;
4934        p = xdr_inline_decode(xdr, 4);
4935        if (unlikely(!p))
4936                goto out_overflow;
4937        res->do_recall = be32_to_cpup(p);
4938
4939        switch (delegation_type) {
4940        case NFS4_OPEN_DELEGATE_READ:
4941                res->delegation_type = FMODE_READ;
4942                break;
4943        case NFS4_OPEN_DELEGATE_WRITE:
4944                res->delegation_type = FMODE_WRITE|FMODE_READ;
4945                if (decode_space_limit(xdr, &res->maxsize) < 0)
4946                                return -EIO;
4947        }
4948        return decode_ace(xdr, NULL, res->server->nfs_client);
4949out_overflow:
4950        print_overflow_msg(__func__, xdr);
4951        return -EIO;
4952}
4953
4954static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
4955{
4956        __be32 *p;
4957        uint32_t savewords, bmlen, i;
4958        int status;
4959
4960        status = decode_op_hdr(xdr, OP_OPEN);
4961        if (status != -EIO)
4962                nfs_increment_open_seqid(status, res->seqid);
4963        if (!status)
4964                status = decode_stateid(xdr, &res->stateid);
4965        if (unlikely(status))
4966                return status;
4967
4968        decode_change_info(xdr, &res->cinfo);
4969
4970        p = xdr_inline_decode(xdr, 8);
4971        if (unlikely(!p))
4972                goto out_overflow;
4973        res->rflags = be32_to_cpup(p++);
4974        bmlen = be32_to_cpup(p);
4975        if (bmlen > 10)
4976                goto xdr_error;
4977
4978        p = xdr_inline_decode(xdr, bmlen << 2);
4979        if (unlikely(!p))
4980                goto out_overflow;
4981        savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
4982        for (i = 0; i < savewords; ++i)
4983                res->attrset[i] = be32_to_cpup(p++);
4984        for (; i < NFS4_BITMAP_SIZE; i++)
4985                res->attrset[i] = 0;
4986
4987        return decode_delegation(xdr, res);
4988xdr_error:
4989        dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
4990        return -EIO;
4991out_overflow:
4992        print_overflow_msg(__func__, xdr);
4993        return -EIO;
4994}
4995
4996static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
4997{
4998        int status;
4999
5000        status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);

5001        if (status != -EIO)
5002                nfs_increment_open_seqid(status, res->seqid);
5003        if (!status)
5004                status = decode_stateid(xdr, &res->stateid);
5005        return status;
5006}
5007
5008static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5009{
5010        int status;
5011
5012        status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5013        if (status != -EIO)
5014                nfs_increment_open_seqid(status, res->seqid);
5015        if (!status)
5016                status = decode_stateid(xdr, &res->stateid);
5017        return status;
5018}
5019
5020static int decode_putfh(struct xdr_stream *xdr)
5021{
5022        return decode_op_hdr(xdr, OP_PUTFH);
5023}
5024
5025static int decode_putrootfh(struct xdr_stream *xdr)
5026{
5027        return decode_op_hdr(xdr, OP_PUTROOTFH);
5028}
5029
5030static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
5031{
5032        __be32 *p;
5033        uint32_t count, eof, recvd;
5034        int status;
5035
5036        status = decode_op_hdr(xdr, OP_READ);
5037        if (status)
5038                return status;
5039        p = xdr_inline_decode(xdr, 8);
5040        if (unlikely(!p))
5041                goto out_overflow;
5042        eof = be32_to_cpup(p++);
5043        count = be32_to_cpup(p);
5044        recvd = xdr_read_pages(xdr, count);
5045        if (count > recvd) {
5046                dprintk("NFS: server cheating in read reply: "
5047                                "count %u > recvd %u\n", count, recvd);
5048                count = recvd;
5049                eof = 0;
5050        }
5051        res->eof = eof;
5052        res->count = count;
5053        return 0;
5054out_overflow:
5055        print_overflow_msg(__func__, xdr);
5056        return -EIO;
5057}
5058
5059static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5060{
5061        int             status;
5062        __be32          verf[2];
5063
5064        status = decode_op_hdr(xdr, OP_READDIR);
5065        if (!status)
5066                status = decode_verifier(xdr, readdir->verifier.data);
5067        if (unlikely(status))
5068                return status;
5069        memcpy(verf, readdir->verifier.data, sizeof(verf));
5070        dprintk("%s: verifier = %08x:%08x\n",
5071                        __func__, verf[0], verf[1]);
5072        return xdr_read_pages(xdr, xdr->buf->page_len);
5073}
5074
5075static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5076{
5077        struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5078        u32 len, recvd;
5079        __be32 *p;
5080        int status;
5081
5082        status = decode_op_hdr(xdr, OP_READLINK);
5083        if (status)
5084                return status;
5085
5086        /* Convert length of symlink */
5087        p = xdr_inline_decode(xdr, 4);
5088        if (unlikely(!p))
5089                goto out_overflow;
5090        len = be32_to_cpup(p);
5091        if (len >= rcvbuf->page_len || len <= 0) {
5092                dprintk("nfs: server returned giant symlink!\n");
5093                return -ENAMETOOLONG;
5094        }
5095        recvd = xdr_read_pages(xdr, len);
5096        if (recvd < len) {
5097                dprintk("NFS: server cheating in readlink reply: "
5098                                "count %u > recvd %u\n", len, recvd);
5099                return -EIO;
5100        }
5101        /*
5102         * The XDR encode routine has set things up so that
5103         * the link text will be copied directly into the
5104         * buffer.  We just have to do overflow-checking,
5105         * and and null-terminate the text (the VFS expects
5106         * null-termination).
5107         */
5108        xdr_terminate_string(rcvbuf, len);
5109        return 0;
5110out_overflow:
5111        print_overflow_msg(__func__, xdr);
5112        return -EIO;
5113}
5114
5115static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5116{
5117        int status;
5118
5119        status = decode_op_hdr(xdr, OP_REMOVE);
5120        if (status)
5121                goto out;
5122        status = decode_change_info(xdr, cinfo);
5123out:
5124        return status;
5125}
5126
5127static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5128              struct nfs4_change_info *new_cinfo)
5129{
5130        int status;
5131
5132        status = decode_op_hdr(xdr, OP_RENAME);
5133        if (status)
5134                goto out;
5135        if ((status = decode_change_info(xdr, old_cinfo)))
5136                goto out;
5137        status = decode_change_info(xdr, new_cinfo);
5138out:
5139        return status;
5140}
5141
5142static int decode_renew(struct xdr_stream *xdr)
5143{
5144        return decode_op_hdr(xdr, OP_RENEW);
5145}
5146
5147static int
5148decode_restorefh(struct xdr_stream *xdr)
5149{
5150        return decode_op_hdr(xdr, OP_RESTOREFH);
5151}
5152
5153static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5154                         struct nfs_getaclres *res)
5155{
5156        unsigned int savep;
5157        uint32_t attrlen,
5158                 bitmap[3] = {0};
5159        int status;
5160        unsigned int pg_offset;
5161
5162        res->acl_len = 0;
5163        if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5164                goto out;
5165
5166        xdr_enter_page(xdr, xdr->buf->page_len);
5167
5168        /* Calculate the offset of the page data */
5169        pg_offset = xdr->buf->head[0].iov_len;
5170
5171        if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5172                goto out;
5173        if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5174                goto out;
5175
5176        if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5177                return -EIO;
5178        if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5179
5180                /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5181                 * are stored with the acl data to handle the problem of
5182                 * variable length bitmaps.*/
5183                res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5184                res->acl_len = attrlen;
5185
5186                /* Check for receive buffer overflow */
5187                if (res->acl_len > (xdr->nwords << 2) ||
5188                    res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5189                        res->acl_flags |= NFS4_ACL_TRUNC;
5190                        dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5191                                        attrlen, xdr->nwords << 2);
5192                }
5193        } else
5194                status = -EOPNOTSUPP;
5195
5196out:
5197        return status;
5198}
5199
5200static int
5201decode_savefh(struct xdr_stream *xdr)
5202{
5203        return decode_op_hdr(xdr, OP_SAVEFH);
5204}
5205
5206static int decode_setattr(struct xdr_stream *xdr)
5207{
5208        __be32 *p;
5209        uint32_t bmlen;
5210        int status;
5211
5212        status = decode_op_hdr(xdr, OP_SETATTR);
5213        if (status)
5214                return status;
5215        p = xdr_inline_decode(xdr, 4);
5216        if (unlikely(!p))
5217                goto out_overflow;
5218        bmlen = be32_to_cpup(p);
5219        p = xdr_inline_decode(xdr, bmlen << 2);
5220        if (likely(p))
5221                return 0;
5222out_overflow:
5223        print_overflow_msg(__func__, xdr);
5224        return -EIO;
5225}
5226
5227static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5228{
5229        __be32 *p;
5230        uint32_t opnum;
5231        int32_t nfserr;
5232
5233        p = xdr_inline_decode(xdr, 8);
5234        if (unlikely(!p))
5235                goto out_overflow;
5236        opnum = be32_to_cpup(p++);
5237        if (opnum != OP_SETCLIENTID) {
5238                dprintk("nfs: decode_setclientid: Server returned operation"
5239                        " %d\n", opnum);
5240                return -EIO;
5241        }
5242        nfserr = be32_to_cpup(p);
5243        if (nfserr == NFS_OK) {
5244                p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5245                if (unlikely(!p))
5246                        goto out_overflow;
5247                p = xdr_decode_hyper(p, &res->clientid);
5248                memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5249        } else if (nfserr == NFSERR_CLID_INUSE) {
5250                uint32_t len;
5251
5252                /* skip netid string */
5253                p = xdr_inline_decode(xdr, 4);
5254                if (unlikely(!p))
5255                        goto out_overflow;
5256                len = be32_to_cpup(p);
5257                p = xdr_inline_decode(xdr, len);
5258                if (unlikely(!p))
5259                        goto out_overflow;
5260
5261                /* skip uaddr string */
5262                p = xdr_inline_decode(xdr, 4);
5263                if (unlikely(!p))
5264                        goto out_overflow;
5265                len = be32_to_cpup(p);
5266                p = xdr_inline_decode(xdr, len);
5267                if (unlikely(!p))
5268                        goto out_overflow;
5269                return -NFSERR_CLID_INUSE;
5270        } else
5271                return nfs4_stat_to_errno(nfserr);
5272
5273        return 0;
5274out_overflow:
5275        print_overflow_msg(__func__, xdr);
5276        return -EIO;
5277}
5278
5279static int decode_setclientid_confirm(struct xdr_stream *xdr)
5280{
5281        return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5282}
5283
5284static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
5285{
5286        __be32 *p;
5287        int status;
5288
5289        status = decode_op_hdr(xdr, OP_WRITE);
5290        if (status)
5291                return status;
5292
5293        p = xdr_inline_decode(xdr, 8);
5294        if (unlikely(!p))
5295                goto out_overflow;
5296        res->count = be32_to_cpup(p++);
5297        res->verf->committed = be32_to_cpup(p++);
5298        return decode_write_verifier(xdr, &res->verf->verifier);
5299out_overflow:
5300        print_overflow_msg(__func__, xdr);
5301        return -EIO;
5302}
5303
5304static int decode_delegreturn(struct xdr_stream *xdr)
5305{
5306        return decode_op_hdr(xdr, OP_DELEGRETURN);
5307}
5308
5309static int decode_secinfo_gss(struct xdr_stream *xdr,
5310                              struct nfs4_secinfo4 *flavor)
5311{
5312        u32 oid_len;
5313        __be32 *p;
5314
5315        p = xdr_inline_decode(xdr, 4);
5316        if (unlikely(!p))
5317                goto out_overflow;
5318        oid_len = be32_to_cpup(p);
5319        if (oid_len > GSS_OID_MAX_LEN)
5320                goto out_err;
5321
5322        p = xdr_inline_decode(xdr, oid_len);
5323        if (unlikely(!p))
5324                goto out_overflow;
5325        memcpy(flavor->flavor_info.oid.data, p, oid_len);
5326        flavor->flavor_info.oid.len = oid_len;
5327
5328        p = xdr_inline_decode(xdr, 8);
5329        if (unlikely(!p))
5330                goto out_overflow;
5331        flavor->flavor_info.qop = be32_to_cpup(p++);
5332        flavor->flavor_info.service = be32_to_cpup(p);
5333
5334        return 0;
5335
5336out_overflow:
5337        print_overflow_msg(__func__, xdr);
5338        return -EIO;
5339out_err:
5340        return -EINVAL;
5341}
5342
5343static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5344{
5345        struct nfs4_secinfo4 *sec_flavor;
5346        unsigned int i, num_flavors;
5347        int status;
5348        __be32 *p;
5349
5350        p = xdr_inline_decode(xdr, 4);
5351        if (unlikely(!p))
5352                goto out_overflow;
5353
5354        res->flavors->num_flavors = 0;
5355        num_flavors = be32_to_cpup(p);
5356
5357        for (i = 0; i < num_flavors; i++) {
5358                sec_flavor = &res->flavors->flavors[i];
5359                if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5360                        break;
5361
5362                p = xdr_inline_decode(xdr, 4);
5363                if (unlikely(!p))
5364                        goto out_overflow;
5365                sec_flavor->flavor = be32_to_cpup(p);
5366
5367                if (sec_flavor->flavor == RPC_AUTH_GSS) {
5368                        status = decode_secinfo_gss(xdr, sec_flavor);
5369                        if (status)
5370                                goto out;
5371                }
5372                res->flavors->num_flavors++;
5373        }
5374
5375        status = 0;
5376out:
5377        return status;
5378out_overflow:
5379        print_overflow_msg(__func__, xdr);
5380        return -EIO;
5381}
5382
5383static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5384{
5385        int status = decode_op_hdr(xdr, OP_SECINFO);
5386        if (status)
5387                return status;
5388        return decode_secinfo_common(xdr, res);
5389}
5390
5391#if defined(CONFIG_NFS_V4_1)
5392static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5393{
5394        int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5395        if (status)
5396                return status;
5397        return decode_secinfo_common(xdr, res);
5398}
5399
5400static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5401{
5402        __be32 *p;
5403        uint32_t bitmap_words;
5404        unsigned int i;
5405
5406        p = xdr_inline_decode(xdr, 4);
5407        bitmap_words = be32_to_cpup(p++);
5408        if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5409                return -EIO;
5410        p = xdr_inline_decode(xdr, 4 * bitmap_words);
5411        for (i = 0; i < bitmap_words; i++)
5412                op_map->u.words[i] = be32_to_cpup(p++);
5413
5414        return 0;
5415}
5416
5417static int decode_exchange_id(struct xdr_stream *xdr,
5418                              struct nfs41_exchange_id_res *res)
5419{
5420        __be32 *p;
5421        uint32_t dummy;
5422        char *dummy_str;
5423        int status;
5424        uint32_t impl_id_count;
5425
5426        status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5427        if (status)
5428                return status;
5429
5430        p = xdr_inline_decode(xdr, 8);
5431        if (unlikely(!p))
5432                goto out_overflow;
5433        xdr_decode_hyper(p, &res->clientid);
5434        p = xdr_inline_decode(xdr, 12);
5435        if (unlikely(!p))
5436                goto out_overflow;
5437        res->seqid = be32_to_cpup(p++);
5438        res->flags = be32_to_cpup(p++);
5439
5440        res->state_protect.how = be32_to_cpup(p);
5441        switch (res->state_protect.how) {
5442        case SP4_NONE:
5443                break;
5444        case SP4_MACH_CRED:
5445                status = decode_op_map(xdr, &res->state_protect.enforce);
5446                if (status)
5447                        return status;
5448                status = decode_op_map(xdr, &res->state_protect.allow);
5449                if (status)
5450                        return status;
5451                break;
5452        default:
5453                WARN_ON_ONCE(1);
5454                return -EIO;
5455        }
5456
5457        /* server_owner4.so_minor_id */
5458        p = xdr_inline_decode(xdr, 8);
5459        if (unlikely(!p))
5460                goto out_overflow;
5461        p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5462
5463        /* server_owner4.so_major_id */
5464        status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5465        if (unlikely(status))
5466                return status;
5467        if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5468                return -EIO;
5469        memcpy(res->server_owner->major_id, dummy_str, dummy);
5470        res->server_owner->major_id_sz = dummy;
5471
5472        /* server_scope4 */
5473        status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5474        if (unlikely(status))
5475                return status;
5476        if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5477                return -EIO;
5478        memcpy(res->server_scope->server_scope, dummy_str, dummy);
5479        res->server_scope->server_scope_sz = dummy;
5480
5481        /* Implementation Id */
5482        p = xdr_inline_decode(xdr, 4);
5483        if (unlikely(!p))
5484                goto out_overflow;
5485        impl_id_count = be32_to_cpup(p++);
5486
5487        if (impl_id_count) {
5488                /* nii_domain */
5489                status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5490                if (unlikely(status))
5491                        return status;
5492                if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5493                        return -EIO;
5494                memcpy(res->impl_id->domain, dummy_str, dummy);
5495
5496                /* nii_name */
5497                status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5498                if (unlikely(status))
5499                        return status;
5500                if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5501                        return -EIO;
5502                memcpy(res->impl_id->name, dummy_str, dummy);
5503
5504                /* nii_date */
5505                p = xdr_inline_decode(xdr, 12);
5506                if (unlikely(!p))
5507                        goto out_overflow;
5508                p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5509                res->impl_id->date.nseconds = be32_to_cpup(p);
5510
5511                /* if there's more than one entry, ignore the rest */
5512        }
5513        return 0;
5514out_overflow:
5515        print_overflow_msg(__func__, xdr);
5516        return -EIO;
5517}
5518
5519static int decode_chan_attrs(struct xdr_stream *xdr,
5520                             struct nfs4_channel_attrs *attrs)
5521{
5522        __be32 *p;
5523        u32 nr_attrs, val;
5524
5525        p = xdr_inline_decode(xdr, 28);
5526        if (unlikely(!p))
5527                goto out_overflow;
5528        val = be32_to_cpup(p++);        /* headerpadsz */
5529        if (val)
5530                return -EINVAL;         /* no support for header padding yet */
5531        attrs->max_rqst_sz = be32_to_cpup(p++);
5532        attrs->max_resp_sz = be32_to_cpup(p++);
5533        attrs->max_resp_sz_cached = be32_to_cpup(p++);
5534        attrs->max_ops = be32_to_cpup(p++);
5535        attrs->max_reqs = be32_to_cpup(p++);
5536        nr_attrs = be32_to_cpup(p);
5537        if (unlikely(nr_attrs > 1)) {
5538                printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5539                        "count %u\n", __func__, nr_attrs);
5540                return -EINVAL;
5541        }
5542        if (nr_attrs == 1) {
5543                p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5544                if (unlikely(!p))
5545                        goto out_overflow;
5546        }
5547        return 0;
5548out_overflow:
5549        print_overflow_msg(__func__, xdr);
5550        return -EIO;
5551}
5552
5553static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5554{
5555        return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5556}
5557
5558static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5559                                struct nfs41_bind_conn_to_session_res *res)
5560{
5561        __be32 *p;
5562        int status;
5563
5564        status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5565        if (!status)
5566                status = decode_sessionid(xdr, &res->session->sess_id);
5567        if (unlikely(status))
5568                return status;
5569
5570        /* dir flags, rdma mode bool */
5571        p = xdr_inline_decode(xdr, 8);
5572        if (unlikely(!p))
5573                goto out_overflow;
5574
5575        res->dir = be32_to_cpup(p++);
5576        if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5577                return -EIO;
5578        if (be32_to_cpup(p) == 0)
5579                res->use_conn_in_rdma_mode = false;
5580        else
5581                res->use_conn_in_rdma_mode = true;
5582
5583        return 0;
5584out_overflow:
5585        print_overflow_msg(__func__, xdr);
5586        return -EIO;
5587}
5588
5589static int decode_create_session(struct xdr_stream *xdr,
5590                                 struct nfs41_create_session_res *res)
5591{
5592        __be32 *p;
5593        int status;
5594        struct nfs_client *clp = res->client;
5595        struct nfs4_session *session = clp->cl_session;
5596
5597        status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5598        if (!status)
5599                status = decode_sessionid(xdr, &session->sess_id);
5600        if (unlikely(status))
5601                return status;
5602
5603        /* seqid, flags */
5604        p = xdr_inline_decode(xdr, 8);
5605        if (unlikely(!p))
5606                goto out_overflow;
5607        clp->cl_seqid = be32_to_cpup(p++);
5608        session->flags = be32_to_cpup(p);
5609
5610        /* Channel attributes */
5611        status = decode_chan_attrs(xdr, &session->fc_attrs);
5612        if (!status)
5613                status = decode_chan_attrs(xdr, &session->bc_attrs);
5614        return status;
5615out_overflow:
5616        print_overflow_msg(__func__, xdr);
5617        return -EIO;
5618}
5619
5620static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5621{
5622        return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5623}
5624
5625static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5626{
5627        return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5628}
5629
5630static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5631{
5632        return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5633}
5634#endif /* CONFIG_NFS_V4_1 */
5635
5636static int decode_sequence(struct xdr_stream *xdr,
5637                           struct nfs4_sequence_res *res,
5638                           struct rpc_rqst *rqstp)
5639{
5640#if defined(CONFIG_NFS_V4_1)
5641        struct nfs4_session *session;
5642        struct nfs4_sessionid id;
5643        u32 dummy;
5644        int status;
5645        __be32 *p;
5646
5647        if (res->sr_slot == NULL)
5648                return 0;
5649        if (!res->sr_slot->table->session)
5650                return 0;
5651
5652        status = decode_op_hdr(xdr, OP_SEQUENCE);
5653        if (!status)
5654                status = decode_sessionid(xdr, &id);
5655        if (unlikely(status))
5656                goto out_err;
5657
5658        /*
5659         * If the server returns different values for sessionID, slotID or
5660         * sequence number, the server is looney tunes.
5661         */
5662        status = -EREMOTEIO;
5663        session = res->sr_slot->table->session;
5664
5665        if (memcmp(id.data, session->sess_id.data,
5666                   NFS4_MAX_SESSIONID_LEN)) {
5667                dprintk("%s Invalid session id\n", __func__);
5668                goto out_err;
5669        }
5670
5671        p = xdr_inline_decode(xdr, 20);
5672        if (unlikely(!p))
5673                goto out_overflow;
5674
5675        /* seqid */
5676        dummy = be32_to_cpup(p++);
5677        if (dummy != res->sr_slot->seq_nr) {
5678                dprintk("%s Invalid sequence number\n", __func__);
5679                goto out_err;
5680        }
5681        /* slot id */
5682        dummy = be32_to_cpup(p++);
5683        if (dummy != res->sr_slot->slot_nr) {
5684                dprintk("%s Invalid slot id\n", __func__);
5685                goto out_err;
5686        }
5687        /* highest slot id */
5688        res->sr_highest_slotid = be32_to_cpup(p++);
5689        /* target highest slot id */
5690        res->sr_target_highest_slotid = be32_to_cpup(p++);
5691        /* result flags */
5692        res->sr_status_flags = be32_to_cpup(p);
5693        status = 0;
5694out_err:
5695        res->sr_status = status;
5696        return status;
5697out_overflow:
5698        print_overflow_msg(__func__, xdr);
5699        status = -EIO;
5700        goto out_err;
5701#else  /* CONFIG_NFS_V4_1 */
5702        return 0;
5703#endif /* CONFIG_NFS_V4_1 */
5704}
5705
5706#if defined(CONFIG_NFS_V4_1)
5707/*
5708 * TODO: Need to handle case when EOF != true;
5709 */
5710static int decode_getdevicelist(struct xdr_stream *xdr,
5711                                struct pnfs_devicelist *res)
5712{
5713        __be32 *p;
5714        int status, i;
5715        nfs4_verifier verftemp;
5716
5717        status = decode_op_hdr(xdr, OP_GETDEVICELIST);
5718        if (status)
5719                return status;
5720
5721        p = xdr_inline_decode(xdr, 8 + 8 + 4);
5722        if (unlikely(!p))
5723                goto out_overflow;
5724
5725        /* TODO: Skip cookie for now */
5726        p += 2;
5727
5728        /* Read verifier */
5729        p = xdr_decode_opaque_fixed(p, verftemp.data, NFS4_VERIFIER_SIZE);
5730
5731        res->num_devs = be32_to_cpup(p);
5732
5733        dprintk("%s: num_dev %d\n", __func__, res->num_devs);
5734
5735        if (res->num_devs > NFS4_PNFS_GETDEVLIST_MAXNUM) {
5736                printk(KERN_ERR "NFS: %s too many result dev_num %u\n",
5737                                __func__, res->num_devs);
5738                return -EIO;
5739        }
5740
5741        p = xdr_inline_decode(xdr,
5742                              res->num_devs * NFS4_DEVICEID4_SIZE + 4);
5743        if (unlikely(!p))
5744                goto out_overflow;
5745        for (i = 0; i < res->num_devs; i++)
5746                p = xdr_decode_opaque_fixed(p, res->dev_id[i].data,
5747                                            NFS4_DEVICEID4_SIZE);
5748        res->eof = be32_to_cpup(p);
5749        return 0;
5750out_overflow:
5751        print_overflow_msg(__func__, xdr);
5752        return -EIO;
5753}
5754
5755static int decode_getdeviceinfo(struct xdr_stream *xdr,
5756                                struct pnfs_device *pdev)
5757{
5758        __be32 *p;
5759        uint32_t len, type;
5760        int status;
5761
5762        status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5763        if (status) {
5764                if (status == -ETOOSMALL) {
5765                        p = xdr_inline_decode(xdr, 4);
5766                        if (unlikely(!p))
5767                                goto out_overflow;
5768                        pdev->mincount = be32_to_cpup(p);
5769                        dprintk("%s: Min count too small. mincnt = %u\n",
5770                                __func__, pdev->mincount);
5771                }
5772                return status;
5773        }
5774
5775        p = xdr_inline_decode(xdr, 8);
5776        if (unlikely(!p))
5777                goto out_overflow;
5778        type = be32_to_cpup(p++);
5779        if (type != pdev->layout_type) {
5780                dprintk("%s: layout mismatch req: %u pdev: %u\n",
5781                        __func__, pdev->layout_type, type);
5782                return -EINVAL;
5783        }
5784        /*
5785         * Get the length of the opaque device_addr4. xdr_read_pages places
5786         * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5787         * and places the remaining xdr data in xdr_buf->tail
5788         */
5789        pdev->mincount = be32_to_cpup(p);
5790        if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5791                goto out_overflow;
5792
5793        /* Parse notification bitmap, verifying that it is zero. */
5794        p = xdr_inline_decode(xdr, 4);
5795        if (unlikely(!p))
5796                goto out_overflow;
5797        len = be32_to_cpup(p);
5798        if (len) {
5799                uint32_t i;
5800
5801                p = xdr_inline_decode(xdr, 4 * len);
5802                if (unlikely(!p))
5803                        goto out_overflow;
5804                for (i = 0; i < len; i++, p++) {
5805                        if (be32_to_cpup(p)) {
5806                                dprintk("%s: notifications not supported\n",
5807                                        __func__);
5808                                return -EIO;
5809                        }
5810                }
5811        }
5812        return 0;
5813out_overflow:
5814        print_overflow_msg(__func__, xdr);
5815        return -EIO;
5816}
5817
5818static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5819                            struct nfs4_layoutget_res *res)
5820{
5821        __be32 *p;
5822        int status;
5823        u32 layout_count;
5824        u32 recvd;
5825
5826        status = decode_op_hdr(xdr, OP_LAYOUTGET);
5827        if (status)
5828                return status;
5829        p = xdr_inline_decode(xdr, 4);
5830        if (unlikely(!p))
5831                goto out_overflow;
5832        res->return_on_close = be32_to_cpup(p);
5833        decode_stateid(xdr, &res->stateid);
5834        p = xdr_inline_decode(xdr, 4);
5835        if (unlikely(!p))
5836                goto out_overflow;
5837        layout_count = be32_to_cpup(p);
5838        if (!layout_count) {
5839                dprintk("%s: server responded with empty layout array\n",
5840                        __func__);
5841                return -EINVAL;
5842        }
5843
5844        p = xdr_inline_decode(xdr, 28);
5845        if (unlikely(!p))
5846                goto out_overflow;
5847        p = xdr_decode_hyper(p, &res->range.offset);
5848        p = xdr_decode_hyper(p, &res->range.length);
5849        res->range.iomode = be32_to_cpup(p++);
5850        res->type = be32_to_cpup(p++);
5851        res->layoutp->len = be32_to_cpup(p);
5852
5853        dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5854                __func__,
5855                (unsigned long)res->range.offset,
5856                (unsigned long)res->range.length,
5857                res->range.iomode,
5858                res->type,
5859                res->layoutp->len);
5860
5861        recvd = xdr_read_pages(xdr, res->layoutp->len);
5862        if (res->layoutp->len > recvd) {
5863                dprintk("NFS: server cheating in layoutget reply: "
5864                                "layout len %u > recvd %u\n",
5865                                res->layoutp->len, recvd);
5866                return -EINVAL;
5867        }
5868
5869        if (layout_count > 1) {
5870                /* We only handle a length one array at the moment.  Any
5871                 * further entries are just ignored.  Note that this means
5872                 * the client may see a response that is less than the
5873                 * minimum it requested.
5874                 */
5875                dprintk("%s: server responded with %d layouts, dropping tail\n",
5876                        __func__, layout_count);
5877        }
5878
5879        return 0;
5880out_overflow:
5881        print_overflow_msg(__func__, xdr);
5882        return -EIO;
5883}
5884
5885static int decode_layoutreturn(struct xdr_stream *xdr,
5886                               struct nfs4_layoutreturn_res *res)
5887{
5888        __be32 *p;
5889        int status;
5890
5891        status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5892        if (status)
5893                return status;
5894        p = xdr_inline_decode(xdr, 4);
5895        if (unlikely(!p))
5896                goto out_overflow;
5897        res->lrs_present = be32_to_cpup(p);
5898        if (res->lrs_present)
5899                status = decode_stateid(xdr, &res->stateid);
5900        return status;
5901out_overflow:
5902        print_overflow_msg(__func__, xdr);
5903        return -EIO;
5904}
5905
5906static int decode_layoutcommit(struct xdr_stream *xdr,
5907                               struct rpc_rqst *req,
5908                               struct nfs4_layoutcommit_res *res)
5909{
5910        __be32 *p;
5911        __u32 sizechanged;
5912        int status;
5913
5914        status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5915        res->status = status;
5916        if (status)
5917                return status;
5918
5919        p = xdr_inline_decode(xdr, 4);
5920        if (unlikely(!p))
5921                goto out_overflow;
5922        sizechanged = be32_to_cpup(p);
5923
5924        if (sizechanged) {
5925                /* throw away new size */
5926                p = xdr_inline_decode(xdr, 8);
5927                if (unlikely(!p))
5928                        goto out_overflow;
5929        }
5930        return 0;
5931out_overflow:
5932        print_overflow_msg(__func__, xdr);
5933        return -EIO;
5934}
5935
5936static int decode_test_stateid(struct xdr_stream *xdr,
5937                               struct nfs41_test_stateid_res *res)
5938{
5939        __be32 *p;
5940        int status;
5941        int num_res;
5942
5943        status = decode_op_hdr(xdr, OP_TEST_STATEID);
5944        if (status)
5945                return status;
5946
5947        p = xdr_inline_decode(xdr, 4);
5948        if (unlikely(!p))
5949                goto out_overflow;
5950        num_res = be32_to_cpup(p++);
5951        if (num_res != 1)
5952                goto out;
5953
5954        p = xdr_inline_decode(xdr, 4);
5955        if (unlikely(!p))
5956                goto out_overflow;
5957        res->status = be32_to_cpup(p++);
5958
5959        return status;
5960out_overflow:
5961        print_overflow_msg(__func__, xdr);
5962out:
5963        return -EIO;
5964}
5965
5966static int decode_free_stateid(struct xdr_stream *xdr,
5967                               struct nfs41_free_stateid_res *res)
5968{
5969        res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
5970        return res->status;
5971}
5972#endif /* CONFIG_NFS_V4_1 */
5973
5974/*
5975 * END OF "GENERIC" DECODE ROUTINES.
5976 */
5977
5978/*
5979 * Decode OPEN_DOWNGRADE response
5980 */
5981static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
5982                                       struct xdr_stream *xdr,
5983                                       struct nfs_closeres *res)
5984{
5985        struct compound_hdr hdr;
5986        int status;
5987
5988        status = decode_compound_hdr(xdr, &hdr);
5989        if (status)
5990                goto out;
5991        status = decode_sequence(xdr, &res->seq_res, rqstp);
5992        if (status)
5993                goto out;
5994        status = decode_putfh(xdr);
5995        if (status)
5996                goto out;
5997        status = decode_open_downgrade(xdr, res);
5998        if (status != 0)
5999                goto out;
6000        decode_getfattr(xdr, res->fattr, res->server);

6001out:
6002        return status;
6003}
6004
6005/*
6006 * Decode ACCESS response
6007 */
6008static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6009                               struct nfs4_accessres *res)
6010{
6011        struct compound_hdr hdr;
6012        int status;
6013
6014        status = decode_compound_hdr(xdr, &hdr);
6015        if (status)
6016                goto out;
6017        status = decode_sequence(xdr, &res->seq_res, rqstp);
6018        if (status)
6019                goto out;
6020        status = decode_putfh(xdr);
6021        if (status != 0)
6022                goto out;
6023        status = decode_access(xdr, &res->supported, &res->access);
6024        if (status != 0)
6025                goto out;
6026        decode_getfattr(xdr, res->fattr, res->server);
6027out:
6028        return status;
6029}
6030
6031/*
6032 * Decode LOOKUP response
6033 */
6034static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6035                               struct nfs4_lookup_res *res)
6036{
6037        struct compound_hdr hdr;
6038        int status;
6039
6040        status = decode_compound_hdr(xdr, &hdr);
6041        if (status)
6042                goto out;
6043        status = decode_sequence(xdr, &res->seq_res, rqstp);
6044        if (status)
6045                goto out;
6046        status = decode_putfh(xdr);
6047        if (status)
6048                goto out;
6049        status = decode_lookup(xdr);
6050        if (status)
6051                goto out;
6052        status = decode_getfh(xdr, res->fh);
6053        if (status)
6054                goto out;
6055        status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6056out:
6057        return status;
6058}
6059
6060/*
6061 * Decode LOOKUP_ROOT response
6062 */
6063static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6064                                    struct xdr_stream *xdr,
6065                                    struct nfs4_lookup_res *res)
6066{
6067        struct compound_hdr hdr;
6068        int status;
6069
6070        status = decode_compound_hdr(xdr, &hdr);
6071        if (status)
6072                goto out;
6073        status = decode_sequence(xdr, &res->seq_res, rqstp);
6074        if (status)
6075                goto out;
6076        status = decode_putrootfh(xdr);
6077        if (status)
6078                goto out;
6079        status = decode_getfh(xdr, res->fh);
6080        if (status == 0)
6081                status = decode_getfattr_label(xdr, res->fattr,
6082                                                res->label, res->server);
6083out:
6084        return status;
6085}
6086
6087/*
6088 * Decode REMOVE response
6089 */
6090static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6091                               struct nfs_removeres *res)
6092{
6093        struct compound_hdr hdr;
6094        int status;
6095
6096        status = decode_compound_hdr(xdr, &hdr);
6097        if (status)
6098                goto out;
6099        status = decode_sequence(xdr, &res->seq_res, rqstp);
6100        if (status)
6101                goto out;
6102        status = decode_putfh(xdr);
6103        if (status)
6104                goto out;
6105        status = decode_remove(xdr, &res->cinfo);
6106out:
6107        return status;
6108}
6109
6110/*
6111 * Decode RENAME response
6112 */
6113static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6114                               struct nfs_renameres *res)
6115{
6116        struct compound_hdr hdr;
6117        int status;
6118
6119        status = decode_compound_hdr(xdr, &hdr);
6120        if (status)
6121                goto out;
6122        status = decode_sequence(xdr, &res->seq_res, rqstp);
6123        if (status)
6124                goto out;
6125        status = decode_putfh(xdr);
6126        if (status)
6127                goto out;
6128        status = decode_savefh(xdr);
6129        if (status)
6130                goto out;
6131        status = decode_putfh(xdr);
6132        if (status)
6133                goto out;
6134        status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6135out:
6136        return status;
6137}
6138
6139/*
6140 * Decode LINK response
6141 */
6142static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6143                             struct nfs4_link_res *res)
6144{
6145        struct compound_hdr hdr;
6146        int status;
6147
6148        status = decode_compound_hdr(xdr, &hdr);
6149        if (status)
6150                goto out;
6151        status = decode_sequence(xdr, &res->seq_res, rqstp);
6152        if (status)
6153                goto out;
6154        status = decode_putfh(xdr);
6155        if (status)
6156                goto out;
6157        status = decode_savefh(xdr);
6158        if (status)
6159                goto out;
6160        status = decode_putfh(xdr);
6161        if (status)
6162                goto out;
6163        status = decode_link(xdr, &res->cinfo);
6164        if (status)
6165                goto out;
6166        /*
6167         * Note order: OP_LINK leaves the directory as the current
6168         *             filehandle.
6169         */
6170        status = decode_restorefh(xdr);
6171        if (status)
6172                goto out;
6173        decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6174out:
6175        return status;
6176}
6177
6178/*
6179 * Decode CREATE response
6180 */
6181static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6182                               struct nfs4_create_res *res)
6183{
6184        struct compound_hdr hdr;
6185        int status;
6186
6187        status = decode_compound_hdr(xdr, &hdr);
6188        if (status)
6189                goto out;
6190        status = decode_sequence(xdr, &res->seq_res, rqstp);
6191        if (status)
6192                goto out;
6193        status = decode_putfh(xdr);
6194        if (status)
6195                goto out;
6196        status = decode_create(xdr, &res->dir_cinfo);
6197        if (status)
6198                goto out;
6199        status = decode_getfh(xdr, res->fh);
6200        if (status)
6201                goto out;
6202        decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6203out:
6204        return status;
6205}
6206
6207/*
6208 * Decode SYMLINK response
6209 */
6210static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6211                                struct nfs4_create_res *res)
6212{
6213        return nfs4_xdr_dec_create(rqstp, xdr, res);
6214}
6215
6216/*
6217 * Decode GETATTR response
6218 */
6219static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6220                                struct nfs4_getattr_res *res)
6221{
6222        struct compound_hdr hdr;
6223        int status;
6224
6225        status = decode_compound_hdr(xdr, &hdr);
6226        if (status)
6227                goto out;
6228        status = decode_sequence(xdr, &res->seq_res, rqstp);
6229        if (status)
6230                goto out;
6231        status = decode_putfh(xdr);
6232        if (status)
6233                goto out;
6234        status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6235out:
6236        return status;
6237}
6238
6239/*
6240 * Encode an SETACL request
6241 */
6242static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6243                                struct nfs_setaclargs *args)
6244{
6245        struct compound_hdr hdr = {
6246                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6247        };
6248
6249        encode_compound_hdr(xdr, req, &hdr);
6250        encode_sequence(xdr, &args->seq_args, &hdr);
6251        encode_putfh(xdr, args->fh, &hdr);
6252        encode_setacl(xdr, args, &hdr);
6253        encode_nops(&hdr);
6254}
6255
6256/*
6257 * Decode SETACL response
6258 */
6259static int
6260nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6261                    struct nfs_setaclres *res)
6262{
6263        struct compound_hdr hdr;
6264        int status;
6265
6266        status = decode_compound_hdr(xdr, &hdr);
6267        if (status)
6268                goto out;
6269        status = decode_sequence(xdr, &res->seq_res, rqstp);
6270        if (status)
6271                goto out;
6272        status = decode_putfh(xdr);
6273        if (status)
6274                goto out;
6275        status = decode_setattr(xdr);
6276out:
6277        return status;
6278}
6279
6280/*
6281 * Decode GETACL response
6282 */
6283static int
6284nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6285                    struct nfs_getaclres *res)
6286{
6287        struct compound_hdr hdr;
6288        int status;
6289
6290        if (res->acl_scratch != NULL) {
6291                void *p = page_address(res->acl_scratch);
6292                xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6293        }
6294        status = decode_compound_hdr(xdr, &hdr);
6295        if (status)
6296                goto out;
6297        status = decode_sequence(xdr, &res->seq_res, rqstp);
6298        if (status)
6299                goto out;
6300        status = decode_putfh(xdr);
6301        if (status)
6302                goto out;
6303        status = decode_getacl(xdr, rqstp, res);
6304
6305out:
6306        return status;
6307}
6308
6309/*
6310 * Decode CLOSE response
6311 */
6312static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6313                              struct nfs_closeres *res)
6314{
6315        struct compound_hdr hdr;
6316        int status;
6317
6318        status = decode_compound_hdr(xdr, &hdr);
6319        if (status)
6320                goto out;
6321        status = decode_sequence(xdr, &res->seq_res, rqstp);
6322        if (status)
6323                goto out;
6324        status = decode_putfh(xdr);
6325        if (status)
6326                goto out;
6327        status = decode_close(xdr, res);
6328        if (status != 0)
6329                goto out;
6330        /*
6331         * Note: Server may do delete on close for this file
6332         *      in which case the getattr call will fail with
6333         *      an ESTALE error. Shouldn't be a problem,
6334         *      though, since fattr->valid will remain unset.
6335         */
6336        decode_getfattr(xdr, res->fattr, res->server);
6337out:
6338        return status;
6339}
6340
6341/*
6342 * Decode OPEN response
6343 */
6344static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6345                             struct nfs_openres *res)
6346{
6347        struct compound_hdr hdr;
6348        int status;
6349
6350        status = decode_compound_hdr(xdr, &hdr);
6351        if (status)
6352                goto out;
6353        status = decode_sequence(xdr, &res->seq_res, rqstp);
6354        if (status)
6355                goto out;
6356        status = decode_putfh(xdr);
6357        if (status)
6358                goto out;
6359        status = decode_open(xdr, res);
6360        if (status)
6361                goto out;
6362        status = decode_getfh(xdr, &res->fh);
6363        if (status)
6364                goto out;
6365        if (res->access_request)
6366                decode_access(xdr, &res->access_supported, &res->access_result);
6367        decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6368out:
6369        return status;
6370}
6371
6372/*
6373 * Decode OPEN_CONFIRM response
6374 */
6375static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6376                                     struct xdr_stream *xdr,
6377                                     struct nfs_open_confirmres *res)
6378{
6379        struct compound_hdr hdr;
6380        int status;
6381
6382        status = decode_compound_hdr(xdr, &hdr);
6383        if (status)
6384                goto out;
6385        status = decode_putfh(xdr);
6386        if (status)
6387                goto out;
6388        status = decode_open_confirm(xdr, res);
6389out:
6390        return status;
6391}
6392
6393/*
6394 * Decode OPEN response
6395 */
6396static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6397                                    struct xdr_stream *xdr,
6398                                    struct nfs_openres *res)
6399{
6400        struct compound_hdr hdr;
6401        int status;
6402
6403        status = decode_compound_hdr(xdr, &hdr);
6404        if (status)
6405                goto out;
6406        status = decode_sequence(xdr, &res->seq_res, rqstp);
6407        if (status)
6408                goto out;
6409        status = decode_putfh(xdr);
6410        if (status)
6411                goto out;
6412        status = decode_open(xdr, res);
6413        if (status)
6414                goto out;
6415        if (res->access_request)
6416                decode_access(xdr, &res->access_supported, &res->access_result);
6417        decode_getfattr(xdr, res->f_attr, res->server);
6418out:
6419        return status;
6420}
6421
6422/*
6423 * Decode SETATTR response
6424 */
6425static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6426                                struct xdr_stream *xdr,
6427                                struct nfs_setattrres *res)
6428{
6429        struct compound_hdr hdr;
6430        int status;
6431
6432        status = decode_compound_hdr(xdr, &hdr);
6433        if (status)
6434                goto out;
6435        status = decode_sequence(xdr, &res->seq_res, rqstp);
6436        if (status)
6437                goto out;
6438        status = decode_putfh(xdr);
6439        if (status)
6440                goto out;
6441        status = decode_setattr(xdr);
6442        if (status)
6443                goto out;
6444        decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6445out:
6446        return status;
6447}
6448
6449/*
6450 * Decode LOCK response
6451 */
6452static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6453                             struct nfs_lock_res *res)
6454{
6455        struct compound_hdr hdr;
6456        int status;
6457
6458        status = decode_compound_hdr(xdr, &hdr);
6459        if (status)
6460                goto out;
6461        status = decode_sequence(xdr, &res->seq_res, rqstp);
6462        if (status)
6463                goto out;
6464        status = decode_putfh(xdr);
6465        if (status)
6466                goto out;
6467        status = decode_lock(xdr, res);
6468out:
6469        return status;
6470}
6471
6472/*
6473 * Decode LOCKT response
6474 */
6475static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6476                              struct nfs_lockt_res *res)
6477{
6478        struct compound_hdr hdr;
6479        int status;
6480
6481        status = decode_compound_hdr(xdr, &hdr);
6482        if (status)
6483                goto out;
6484        status = decode_sequence(xdr, &res->seq_res, rqstp);
6485        if (status)
6486                goto out;
6487        status = decode_putfh(xdr);
6488        if (status)
6489                goto out;
6490        status = decode_lockt(xdr, res);
6491out:
6492        return status;
6493}
6494
6495/*
6496 * Decode LOCKU response
6497 */
6498static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6499                              struct nfs_locku_res *res)
6500{
6501        struct compound_hdr hdr;
6502        int status;
6503
6504        status = decode_compound_hdr(xdr, &hdr);
6505        if (status)
6506                goto out;
6507        status = decode_sequence(xdr, &res->seq_res, rqstp);
6508        if (status)
6509                goto out;
6510        status = decode_putfh(xdr);
6511        if (status)
6512                goto out;
6513        status = decode_locku(xdr, res);
6514out:
6515        return status;
6516}
6517
6518static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6519                                          struct xdr_stream *xdr, void *dummy)
6520{
6521        struct compound_hdr hdr;
6522        int status;
6523
6524        status = decode_compound_hdr(xdr, &hdr);
6525        if (!status)
6526                status = decode_release_lockowner(xdr);
6527        return status;
6528}
6529
6530/*
6531 * Decode READLINK response
6532 */
6533static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6534                                 struct xdr_stream *xdr,
6535                                 struct nfs4_readlink_res *res)
6536{
6537        struct compound_hdr hdr;
6538        int status;
6539
6540        status = decode_compound_hdr(xdr, &hdr);
6541        if (status)
6542                goto out;
6543        status = decode_sequence(xdr, &res->seq_res, rqstp);
6544        if (status)
6545                goto out;
6546        status = decode_putfh(xdr);
6547        if (status)
6548                goto out;
6549        status = decode_readlink(xdr, rqstp);
6550out:
6551        return status;
6552}
6553
6554/*
6555 * Decode READDIR response
6556 */
6557static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6558                                struct nfs4_readdir_res *res)
6559{
6560        struct compound_hdr hdr;
6561        int status;
6562
6563        status = decode_compound_hdr(xdr, &hdr);
6564        if (status)
6565                goto out;
6566        status = decode_sequence(xdr, &res->seq_res, rqstp);
6567        if (status)
6568                goto out;
6569        status = decode_putfh(xdr);
6570        if (status)
6571                goto out;
6572        status = decode_readdir(xdr, rqstp, res);
6573out:
6574        return status;
6575}
6576
6577/*
6578 * Decode Read response
6579 */
6580static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6581                             struct nfs_readres *res)
6582{
6583        struct compound_hdr hdr;
6584        int status;
6585
6586        status = decode_compound_hdr(xdr, &hdr);
6587        if (status)
6588                goto out;
6589        status = decode_sequence(xdr, &res->seq_res, rqstp);
6590        if (status)
6591                goto out;
6592        status = decode_putfh(xdr);
6593        if (status)
6594                goto out;
6595        status = decode_read(xdr, rqstp, res);
6596        if (!status)
6597                status = res->count;
6598out:
6599        return status;
6600}
6601
6602/*
6603 * Decode WRITE response
6604 */
6605static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6606                              struct nfs_writeres *res)
6607{
6608        struct compound_hdr hdr;
6609        int status;
6610
6611        status = decode_compound_hdr(xdr, &hdr);
6612        if (status)
6613                goto out;
6614        status = decode_sequence(xdr, &res->seq_res, rqstp);
6615        if (status)
6616                goto out;
6617        status = decode_putfh(xdr);
6618        if (status)
6619                goto out;
6620        status = decode_write(xdr, res);
6621        if (status)
6622                goto out;
6623        if (res->fattr)
6624                decode_getfattr(xdr, res->fattr, res->server);
6625        if (!status)
6626                status = res->count;
6627out:
6628        return status;
6629}
6630
6631/*
6632 * Decode COMMIT response
6633 */
6634static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6635                               struct nfs_commitres *res)
6636{
6637        struct compound_hdr hdr;
6638        int status;
6639
6640        status = decode_compound_hdr(xdr, &hdr);
6641        if (status)
6642                goto out;
6643        status = decode_sequence(xdr, &res->seq_res, rqstp);
6644        if (status)
6645                goto out;
6646        status = decode_putfh(xdr);
6647        if (status)
6648                goto out;
6649        status = decode_commit(xdr, res);
6650out:
6651        return status;
6652}
6653
6654/*
6655 * Decode FSINFO response
6656 */
6657static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6658                               struct nfs4_fsinfo_res *res)
6659{
6660        struct compound_hdr hdr;
6661        int status;
6662
6663        status = decode_compound_hdr(xdr, &hdr);
6664        if (!status)
6665                status = decode_sequence(xdr, &res->seq_res, req);
6666        if (!status)
6667                status = decode_putfh(xdr);
6668        if (!status)
6669                status = decode_fsinfo(xdr, res->fsinfo);
6670        return status;
6671}
6672
6673/*
6674 * Decode PATHCONF response
6675 */
6676static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6677                                 struct nfs4_pathconf_res *res)
6678{
6679        struct compound_hdr hdr;
6680        int status;
6681
6682        status = decode_compound_hdr(xdr, &hdr);
6683        if (!status)
6684                status = decode_sequence(xdr, &res->seq_res, req);
6685        if (!status)
6686                status = decode_putfh(xdr);
6687        if (!status)
6688                status = decode_pathconf(xdr, res->pathconf);
6689        return status;
6690}
6691
6692/*
6693 * Decode STATFS response
6694 */
6695static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6696                               struct nfs4_statfs_res *res)
6697{
6698        struct compound_hdr hdr;
6699        int status;
6700
6701        status = decode_compound_hdr(xdr, &hdr);
6702        if (!status)
6703                status = decode_sequence(xdr, &res->seq_res, req);
6704        if (!status)
6705                status = decode_putfh(xdr);
6706        if (!status)
6707                status = decode_statfs(xdr, res->fsstat);
6708        return status;
6709}
6710
6711/*
6712 * Decode GETATTR_BITMAP response
6713 */
6714static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6715                                    struct xdr_stream *xdr,
6716                                    struct nfs4_server_caps_res *res)
6717{
6718        struct compound_hdr hdr;
6719        int status;
6720
6721        status = decode_compound_hdr(xdr, &hdr);
6722        if (status)
6723                goto out;
6724        status = decode_sequence(xdr, &res->seq_res, req);
6725        if (status)
6726                goto out;
6727        status = decode_putfh(xdr);
6728        if (status)
6729                goto out;
6730        status = decode_server_caps(xdr, res);
6731out:
6732        return status;
6733}
6734
6735/*
6736 * Decode RENEW response
6737 */
6738static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6739                              void *__unused)
6740{
6741        struct compound_hdr hdr;
6742        int status;
6743
6744        status = decode_compound_hdr(xdr, &hdr);
6745        if (!status)
6746                status = decode_renew(xdr);
6747        return status;
6748}
6749
6750/*
6751 * Decode SETCLIENTID response
6752 */
6753static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6754                                    struct xdr_stream *xdr,
6755                                    struct nfs4_setclientid_res *res)
6756{
6757        struct compound_hdr hdr;
6758        int status;
6759
6760        status = decode_compound_hdr(xdr, &hdr);
6761        if (!status)
6762                status = decode_setclientid(xdr, res);
6763        return status;
6764}
6765
6766/*
6767 * Decode SETCLIENTID_CONFIRM response
6768 */
6769static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6770                                            struct xdr_stream *xdr)
6771{
6772        struct compound_hdr hdr;
6773        int status;
6774
6775        status = decode_compound_hdr(xdr, &hdr);
6776        if (!status)
6777                status = decode_setclientid_confirm(xdr);
6778        return status;
6779}
6780
6781/*
6782 * Decode DELEGRETURN response
6783 */
6784static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6785                                    struct xdr_stream *xdr,
6786                                    struct nfs4_delegreturnres *res)
6787{
6788        struct compound_hdr hdr;
6789        int status;
6790
6791        status = decode_compound_hdr(xdr, &hdr);
6792        if (status)
6793                goto out;
6794        status = decode_sequence(xdr, &res->seq_res, rqstp);
6795        if (status)
6796                goto out;
6797        status = decode_putfh(xdr);
6798        if (status != 0)
6799                goto out;
6800        status = decode_getfattr(xdr, res->fattr, res->server);
6801        if (status != 0)
6802                goto out;
6803        status = decode_delegreturn(xdr);
6804out:
6805        return status;
6806}
6807
6808/*
6809 * Decode FS_LOCATIONS response
6810 */
6811static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6812                                     struct xdr_stream *xdr,
6813                                     struct nfs4_fs_locations_res *res)
6814{
6815        struct compound_hdr hdr;
6816        int status;
6817
6818        status = decode_compound_hdr(xdr, &hdr);
6819        if (status)
6820                goto out;
6821        status = decode_sequence(xdr, &res->seq_res, req);
6822        if (status)
6823                goto out;
6824        status = decode_putfh(xdr);
6825        if (status)
6826                goto out;
6827        status = decode_lookup(xdr);
6828        if (status)
6829                goto out;
6830        xdr_enter_page(xdr, PAGE_SIZE);
6831        status = decode_getfattr_generic(xdr, &res->fs_locations->fattr,
6832                                         NULL, res->fs_locations,
6833                                         NULL, res->fs_locations->server);
6834out:
6835        return status;
6836}
6837
6838/*
6839 * Decode SECINFO response
6840 */
6841static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6842                                struct xdr_stream *xdr,
6843                                struct nfs4_secinfo_res *res)
6844{
6845        struct compound_hdr hdr;
6846        int status;
6847
6848        status = decode_compound_hdr(xdr, &hdr);
6849        if (status)
6850                goto out;
6851        status = decode_sequence(xdr, &res->seq_res, rqstp);
6852        if (status)
6853                goto out;
6854        status = decode_putfh(xdr);
6855        if (status)
6856                goto out;
6857        status = decode_secinfo(xdr, res);
6858out:
6859        return status;
6860}
6861
6862#if defined(CONFIG_NFS_V4_1)
6863/*
6864 * Decode BIND_CONN_TO_SESSION response
6865 */
6866static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
6867                                        struct xdr_stream *xdr,
6868                                        void *res)
6869{
6870        struct compound_hdr hdr;
6871        int status;
6872
6873        status = decode_compound_hdr(xdr, &hdr);
6874        if (!status)
6875                status = decode_bind_conn_to_session(xdr, res);
6876        return status;
6877}
6878
6879/*
6880 * Decode EXCHANGE_ID response
6881 */
6882static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
6883                                    struct xdr_stream *xdr,
6884                                    void *res)
6885{
6886        struct compound_hdr hdr;
6887        int status;
6888
6889        status = decode_compound_hdr(xdr, &hdr);
6890        if (!status)
6891                status = decode_exchange_id(xdr, res);
6892        return status;
6893}
6894
6895/*
6896 * Decode CREATE_SESSION response
6897 */
6898static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
6899                                       struct xdr_stream *xdr,
6900                                       struct nfs41_create_session_res *res)
6901{
6902        struct compound_hdr hdr;
6903        int status;
6904
6905        status = decode_compound_hdr(xdr, &hdr);
6906        if (!status)
6907                status = decode_create_session(xdr, res);
6908        return status;
6909}
6910
6911/*
6912 * Decode DESTROY_SESSION response
6913 */
6914static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
6915                                        struct xdr_stream *xdr,
6916                                        void *res)
6917{
6918        struct compound_hdr hdr;
6919        int status;
6920
6921        status = decode_compound_hdr(xdr, &hdr);
6922        if (!status)
6923                status = decode_destroy_session(xdr, res);
6924        return status;
6925}
6926
6927/*
6928 * Decode DESTROY_CLIENTID response
6929 */
6930static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
6931                                        struct xdr_stream *xdr,
6932                                        void *res)
6933{
6934        struct compound_hdr hdr;
6935        int status;
6936
6937        status = decode_compound_hdr(xdr, &hdr);
6938        if (!status)
6939                status = decode_destroy_clientid(xdr, res);
6940        return status;
6941}
6942
6943/*
6944 * Decode SEQUENCE response
6945 */
6946static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
6947                                 struct xdr_stream *xdr,
6948                                 struct nfs4_sequence_res *res)
6949{
6950        struct compound_hdr hdr;
6951        int status;
6952
6953        status = decode_compound_hdr(xdr, &hdr);
6954        if (!status)
6955                status = decode_sequence(xdr, res, rqstp);
6956        return status;
6957}
6958
6959/*
6960 * Decode GET_LEASE_TIME response
6961 */
6962static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
6963                                       struct xdr_stream *xdr,
6964                                       struct nfs4_get_lease_time_res *res)
6965{
6966        struct compound_hdr hdr;
6967        int status;
6968
6969        status = decode_compound_hdr(xdr, &hdr);
6970        if (!status)
6971                status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
6972        if (!status)
6973                status = decode_putrootfh(xdr);
6974        if (!status)
6975                status = decode_fsinfo(xdr, res->lr_fsinfo);
6976        return status;
6977}
6978
6979/*
6980 * Decode RECLAIM_COMPLETE response
6981 */
6982static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
6983                                         struct xdr_stream *xdr,
6984                                         struct nfs41_reclaim_complete_res *res)
6985{
6986        struct compound_hdr hdr;
6987        int status;
6988
6989        status = decode_compound_hdr(xdr, &hdr);
6990        if (!status)
6991                status = decode_sequence(xdr, &res->seq_res, rqstp);
6992        if (!status)
6993                status = decode_reclaim_complete(xdr, (void *)NULL);
6994        return status;
6995}
6996
6997/*
6998 * Decode GETDEVICELIST response
6999 */
7000static int nfs4_xdr_dec_getdevicelist(struct rpc_rqst *rqstp,

7001                                      struct xdr_stream *xdr,
7002                                      struct nfs4_getdevicelist_res *res)
7003{
7004        struct compound_hdr hdr;
7005        int status;
7006
7007        dprintk("encoding getdevicelist!\n");
7008
7009        status = decode_compound_hdr(xdr, &hdr);
7010        if (status != 0)
7011                goto out;
7012        status = decode_sequence(xdr, &res->seq_res, rqstp);
7013        if (status != 0)
7014                goto out;
7015        status = decode_putfh(xdr);
7016        if (status != 0)
7017                goto out;
7018        status = decode_getdevicelist(xdr, res->devlist);
7019out:
7020        return status;
7021}
7022
7023/*
7024 * Decode GETDEVINFO response
7025 */
7026static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7027                                      struct xdr_stream *xdr,
7028                                      struct nfs4_getdeviceinfo_res *res)
7029{
7030        struct compound_hdr hdr;
7031        int status;
7032
7033        status = decode_compound_hdr(xdr, &hdr);
7034        if (status != 0)
7035                goto out;
7036        status = decode_sequence(xdr, &res->seq_res, rqstp);
7037        if (status != 0)
7038                goto out;
7039        status = decode_getdeviceinfo(xdr, res->pdev);
7040out:
7041        return status;
7042}
7043
7044/*
7045 * Decode LAYOUTGET response
7046 */
7047static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7048                                  struct xdr_stream *xdr,
7049                                  struct nfs4_layoutget_res *res)
7050{
7051        struct compound_hdr hdr;
7052        int status;
7053
7054        status = decode_compound_hdr(xdr, &hdr);
7055        if (status)
7056                goto out;
7057        status = decode_sequence(xdr, &res->seq_res, rqstp);
7058        if (status)
7059                goto out;
7060        status = decode_putfh(xdr);
7061        if (status)
7062                goto out;
7063        status = decode_layoutget(xdr, rqstp, res);
7064out:
7065        return status;
7066}
7067
7068/*
7069 * Decode LAYOUTRETURN response
7070 */
7071static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7072                                     struct xdr_stream *xdr,
7073                                     struct nfs4_layoutreturn_res *res)
7074{
7075        struct compound_hdr hdr;
7076        int status;
7077
7078        status = decode_compound_hdr(xdr, &hdr);
7079        if (status)
7080                goto out;
7081        status = decode_sequence(xdr, &res->seq_res, rqstp);
7082        if (status)
7083                goto out;
7084        status = decode_putfh(xdr);
7085        if (status)
7086                goto out;
7087        status = decode_layoutreturn(xdr, res);
7088out:
7089        return status;
7090}
7091
7092/*
7093 * Decode LAYOUTCOMMIT response
7094 */
7095static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7096                                     struct xdr_stream *xdr,
7097                                     struct nfs4_layoutcommit_res *res)
7098{
7099        struct compound_hdr hdr;
7100        int status;
7101
7102        status = decode_compound_hdr(xdr, &hdr);
7103        if (status)
7104                goto out;
7105        status = decode_sequence(xdr, &res->seq_res, rqstp);
7106        if (status)
7107                goto out;
7108        status = decode_putfh(xdr);
7109        if (status)
7110                goto out;
7111        status = decode_layoutcommit(xdr, rqstp, res);
7112        if (status)
7113                goto out;
7114        decode_getfattr(xdr, res->fattr, res->server);
7115out:
7116        return status;
7117}
7118
7119/*
7120 * Decode SECINFO_NO_NAME response
7121 */
7122static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7123                                        struct xdr_stream *xdr,
7124                                        struct nfs4_secinfo_res *res)
7125{
7126        struct compound_hdr hdr;
7127        int status;
7128
7129        status = decode_compound_hdr(xdr, &hdr);
7130        if (status)
7131                goto out;
7132        status = decode_sequence(xdr, &res->seq_res, rqstp);
7133        if (status)
7134                goto out;
7135        status = decode_putrootfh(xdr);
7136        if (status)
7137                goto out;
7138        status = decode_secinfo_no_name(xdr, res);
7139out:
7140        return status;
7141}
7142
7143/*
7144 * Decode TEST_STATEID response
7145 */
7146static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7147                                     struct xdr_stream *xdr,
7148                                     struct nfs41_test_stateid_res *res)
7149{
7150        struct compound_hdr hdr;
7151        int status;
7152
7153        status = decode_compound_hdr(xdr, &hdr);
7154        if (status)
7155                goto out;
7156        status = decode_sequence(xdr, &res->seq_res, rqstp);
7157        if (status)
7158                goto out;
7159        status = decode_test_stateid(xdr, res);
7160out:
7161        return status;
7162}
7163
7164/*
7165 * Decode FREE_STATEID response
7166 */
7167static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7168                                     struct xdr_stream *xdr,
7169                                     struct nfs41_free_stateid_res *res)
7170{
7171        struct compound_hdr hdr;
7172        int status;
7173
7174        status = decode_compound_hdr(xdr, &hdr);
7175        if (status)
7176                goto out;
7177        status = decode_sequence(xdr, &res->seq_res, rqstp);
7178        if (status)
7179                goto out;
7180        status = decode_free_stateid(xdr, res);
7181out:
7182        return status;
7183}
7184#endif /* CONFIG_NFS_V4_1 */
7185
7186/**
7187 * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7188 *                      the local page cache.
7189 * @xdr: XDR stream where entry resides
7190 * @entry: buffer to fill in with entry data
7191 * @plus: boolean indicating whether this should be a readdirplus entry
7192 *
7193 * Returns zero if successful, otherwise a negative errno value is
7194 * returned.
7195 *
7196 * This function is not invoked during READDIR reply decoding, but
7197 * rather whenever an application invokes the getdents(2) system call
7198 * on a directory already in our cache.
7199 */
7200int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7201                       int plus)
7202{
7203        unsigned int savep;
7204        uint32_t bitmap[3] = {0};
7205        uint32_t len;
7206        __be32 *p = xdr_inline_decode(xdr, 4);
7207        if (unlikely(!p))
7208                goto out_overflow;
7209        if (*p == xdr_zero) {
7210                p = xdr_inline_decode(xdr, 4);
7211                if (unlikely(!p))
7212                        goto out_overflow;
7213                if (*p == xdr_zero)
7214                        return -EAGAIN;
7215                entry->eof = 1;
7216                return -EBADCOOKIE;
7217        }
7218
7219        p = xdr_inline_decode(xdr, 12);
7220        if (unlikely(!p))
7221                goto out_overflow;
7222        entry->prev_cookie = entry->cookie;
7223        p = xdr_decode_hyper(p, &entry->cookie);
7224        entry->len = be32_to_cpup(p);
7225
7226        p = xdr_inline_decode(xdr, entry->len);
7227        if (unlikely(!p))
7228                goto out_overflow;
7229        entry->name = (const char *) p;
7230
7231        /*
7232         * In case the server doesn't return an inode number,
7233         * we fake one here.  (We don't use inode number 0,
7234         * since glibc seems to choke on it...)
7235         */
7236        entry->ino = 1;
7237        entry->fattr->valid = 0;
7238
7239        if (decode_attr_bitmap(xdr, bitmap) < 0)
7240                goto out_overflow;
7241
7242        if (decode_attr_length(xdr, &len, &savep) < 0)
7243                goto out_overflow;
7244
7245        if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7246                        NULL, entry->label, entry->server) < 0)
7247                goto out_overflow;
7248        if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7249                entry->ino = entry->fattr->mounted_on_fileid;
7250        else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7251                entry->ino = entry->fattr->fileid;
7252
7253        entry->d_type = DT_UNKNOWN;
7254        if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7255                entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7256
7257        return 0;
7258
7259out_overflow:
7260        print_overflow_msg(__func__, xdr);
7261        return -EAGAIN;
7262}
7263
7264/*
7265 * We need to translate between nfs status return values and
7266 * the local errno values which may not be the same.
7267 */
7268static struct {
7269        int stat;
7270        int errno;
7271} nfs_errtbl[] = {
7272        { NFS4_OK,              0               },
7273        { NFS4ERR_PERM,         -EPERM          },
7274        { NFS4ERR_NOENT,        -ENOENT         },
7275        { NFS4ERR_IO,           -errno_NFSERR_IO},
7276        { NFS4ERR_NXIO,         -ENXIO          },
7277        { NFS4ERR_ACCESS,       -EACCES         },
7278        { NFS4ERR_EXIST,        -EEXIST         },
7279        { NFS4ERR_XDEV,         -EXDEV          },
7280        { NFS4ERR_NOTDIR,       -ENOTDIR        },
7281        { NFS4ERR_ISDIR,        -EISDIR         },
7282        { NFS4ERR_INVAL,        -EINVAL         },
7283        { NFS4ERR_FBIG,         -EFBIG          },
7284        { NFS4ERR_NOSPC,        -ENOSPC         },
7285        { NFS4ERR_ROFS,         -EROFS          },
7286        { NFS4ERR_MLINK,        -EMLINK         },
7287        { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
7288        { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
7289        { NFS4ERR_DQUOT,        -EDQUOT         },
7290        { NFS4ERR_STALE,        -ESTALE         },
7291        { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
7292        { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
7293        { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
7294        { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
7295        { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
7296        { NFS4ERR_BADTYPE,      -EBADTYPE       },
7297        { NFS4ERR_LOCKED,       -EAGAIN         },
7298        { NFS4ERR_SYMLINK,      -ELOOP          },
7299        { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
7300        { NFS4ERR_DEADLOCK,     -EDEADLK        },
7301        { -1,                   -EIO            }
7302};
7303
7304/*
7305 * Convert an NFS error code to a local one.
7306 * This one is used jointly by NFSv2 and NFSv3.
7307 */
7308static int
7309nfs4_stat_to_errno(int stat)
7310{
7311        int i;
7312        for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7313                if (nfs_errtbl[i].stat == stat)
7314                        return nfs_errtbl[i].errno;
7315        }
7316        if (stat <= 10000 || stat > 10100) {
7317                /* The server is looney tunes. */
7318                return -EREMOTEIO;
7319        }
7320        /* If we cannot translate the error, the recovery routines should
7321         * handle it.
7322         * Note: remaining NFSv4 error codes have values > 10000, so should
7323         * not conflict with native Linux error codes.
7324         */
7325        return -stat;
7326}
7327
7328#define PROC(proc, argtype, restype)                            \
7329[NFSPROC4_CLNT_##proc] = {                                      \
7330        .p_proc   = NFSPROC4_COMPOUND,                          \
7331        .p_encode = (kxdreproc_t)nfs4_xdr_##argtype,            \
7332        .p_decode = (kxdrdproc_t)nfs4_xdr_##restype,            \
7333        .p_arglen = NFS4_##argtype##_sz,                        \
7334        .p_replen = NFS4_##restype##_sz,                        \
7335        .p_statidx = NFSPROC4_CLNT_##proc,                      \
7336        .p_name   = #proc,                                      \
7337}
7338
7339struct rpc_procinfo     nfs4_procedures[] = {
7340        PROC(READ,              enc_read,               dec_read),
7341        PROC(WRITE,             enc_write,              dec_write),
7342        PROC(COMMIT,            enc_commit,             dec_commit),
7343        PROC(OPEN,              enc_open,               dec_open),
7344        PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
7345        PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
7346        PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
7347        PROC(CLOSE,             enc_close,              dec_close),
7348        PROC(SETATTR,           enc_setattr,            dec_setattr),
7349        PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
7350        PROC(RENEW,             enc_renew,              dec_renew),
7351        PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
7352        PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7353        PROC(LOCK,              enc_lock,               dec_lock),
7354        PROC(LOCKT,             enc_lockt,              dec_lockt),
7355        PROC(LOCKU,             enc_locku,              dec_locku),
7356        PROC(ACCESS,            enc_access,             dec_access),
7357        PROC(GETATTR,           enc_getattr,            dec_getattr),
7358        PROC(LOOKUP,            enc_lookup,             dec_lookup),
7359        PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
7360        PROC(REMOVE,            enc_remove,             dec_remove),
7361        PROC(RENAME,            enc_rename,             dec_rename),
7362        PROC(LINK,              enc_link,               dec_link),
7363        PROC(SYMLINK,           enc_symlink,            dec_symlink),
7364        PROC(CREATE,            enc_create,             dec_create),
7365        PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
7366        PROC(STATFS,            enc_statfs,             dec_statfs),
7367        PROC(READLINK,          enc_readlink,           dec_readlink),
7368        PROC(READDIR,           enc_readdir,            dec_readdir),
7369        PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
7370        PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
7371        PROC(GETACL,            enc_getacl,             dec_getacl),
7372        PROC(SETACL,            enc_setacl,             dec_setacl),
7373        PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
7374        PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
7375        PROC(SECINFO,           enc_secinfo,            dec_secinfo),
7376#if defined(CONFIG_NFS_V4_1)
7377        PROC(EXCHANGE_ID,       enc_exchange_id,        dec_exchange_id),
7378        PROC(CREATE_SESSION,    enc_create_session,     dec_create_session),
7379        PROC(DESTROY_SESSION,   enc_destroy_session,    dec_destroy_session),
7380        PROC(SEQUENCE,          enc_sequence,           dec_sequence),
7381        PROC(GET_LEASE_TIME,    enc_get_lease_time,     dec_get_lease_time),
7382        PROC(RECLAIM_COMPLETE,  enc_reclaim_complete,   dec_reclaim_complete),
7383        PROC(GETDEVICEINFO,     enc_getdeviceinfo,      dec_getdeviceinfo),
7384        PROC(LAYOUTGET,         enc_layoutget,          dec_layoutget),
7385        PROC(LAYOUTCOMMIT,      enc_layoutcommit,       dec_layoutcommit),
7386        PROC(LAYOUTRETURN,      enc_layoutreturn,       dec_layoutreturn),
7387        PROC(SECINFO_NO_NAME,   enc_secinfo_no_name,    dec_secinfo_no_name),
7388        PROC(TEST_STATEID,      enc_test_stateid,       dec_test_stateid),
7389        PROC(FREE_STATEID,      enc_free_stateid,       dec_free_stateid),
7390        PROC(GETDEVICELIST,     enc_getdevicelist,      dec_getdevicelist),
7391        PROC(BIND_CONN_TO_SESSION,
7392                        enc_bind_conn_to_session, dec_bind_conn_to_session),
7393        PROC(DESTROY_CLIENTID,  enc_destroy_clientid,   dec_destroy_clientid),
7394#endif /* CONFIG_NFS_V4_1 */
7395};
7396
7397const struct rpc_version nfs_version4 = {
7398        .number                 = 4,
7399        .nrprocs                = ARRAY_SIZE(nfs4_procedures),
7400        .procs                  = nfs4_procedures
7401};
7402
7403/*
7404 * Local variables:
7405 *  c-basic-offset: 8
7406 * End:
7407 */
7408