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/fs_struct.h>
  56
  57#include "nfs4_fs.h"
  58#include "internal.h"
  59#include "nfs4idmap.h"
  60#include "nfs4session.h"
  61#include "pnfs.h"
  62#include "netns.h"
  63
  64#define NFSDBG_FACILITY         NFSDBG_XDR
  65
  66/* Mapping from NFS error code to "errno" error code. */
  67#define errno_NFSERR_IO         EIO
  68
  69static int nfs4_stat_to_errno(int);
  70
  71/* NFSv4 COMPOUND tags are only wanted for debugging purposes */
  72#ifdef DEBUG
  73#define NFS4_MAXTAGLEN          20
  74#else
  75#define NFS4_MAXTAGLEN          0
  76#endif
  77
  78/* lock,open owner id:
  79 * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT  >> 2)
  80 */
  81#define open_owner_id_maxsz     (1 + 2 + 1 + 1 + 2)
  82#define lock_owner_id_maxsz     (1 + 1 + 4)
  83#define decode_lockowner_maxsz  (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  84#define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  85#define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  86#define op_encode_hdr_maxsz     (1)
  87#define op_decode_hdr_maxsz     (2)
  88#define encode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  89#define decode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  90#define encode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  91#define decode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  92#define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
  93                                (NFS4_FHSIZE >> 2))
  94#define decode_putfh_maxsz      (op_decode_hdr_maxsz)
  95#define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
  96#define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
  97#define encode_getfh_maxsz      (op_encode_hdr_maxsz)
  98#define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
  99                                ((3+NFS4_FHSIZE) >> 2))
 100#define nfs4_fattr_bitmap_maxsz 4
 101#define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
 102#define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
 103#define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
 104#define nfs4_owner_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 105#define nfs4_group_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 106#ifdef CONFIG_NFS_V4_SECURITY_LABEL
 107/* PI(4 bytes) + LFS(4 bytes) + 1(for null terminator?) + MAXLABELLEN */
 108#define nfs4_label_maxsz        (4 + 4 + 1 + XDR_QUADLEN(NFS4_MAXLABELLEN))
 109#else
 110#define nfs4_label_maxsz        0
 111#endif
 112/* We support only one layout type per file system */
 113#define decode_mdsthreshold_maxsz (1 + 1 + nfs4_fattr_bitmap_maxsz + 1 + 8)
 114/* This is based on getfattr, which uses the most attributes: */
 115#define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
 116                                3 + 3 + 3 + nfs4_owner_maxsz + \
 117                                nfs4_group_maxsz + nfs4_label_maxsz + \
 118                                 decode_mdsthreshold_maxsz))
 119#define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
 120                                nfs4_fattr_value_maxsz)
 121#define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
 122#define encode_attrs_maxsz      (nfs4_fattr_bitmap_maxsz + \
 123                                 1 + 2 + 1 + \
 124                                nfs4_owner_maxsz + \
 125                                nfs4_group_maxsz + \
 126                                nfs4_label_maxsz + \
 127                                4 + 4)
 128#define encode_savefh_maxsz     (op_encode_hdr_maxsz)
 129#define decode_savefh_maxsz     (op_decode_hdr_maxsz)
 130#define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
 131#define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 132#define encode_fsinfo_maxsz     (encode_getattr_maxsz)
 133/* The 5 accounts for the PNFS attributes, and assumes that at most three
 134 * layout types will be returned.
 135 */
 136#define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + \
 137                                 nfs4_fattr_bitmap_maxsz + 4 + 8 + 5)
 138#define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 139#define decode_renew_maxsz      (op_decode_hdr_maxsz)
 140#define encode_setclientid_maxsz \
 141                                (op_encode_hdr_maxsz + \
 142                                XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 143                                /* client name */ \
 144                                1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 145                                1 /* sc_prog */ + \
 146                                XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 147                                XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
 148                                1) /* sc_cb_ident */
 149#define decode_setclientid_maxsz \
 150                                (op_decode_hdr_maxsz + \
 151                                2 + \
 152                                1024) /* large value for CLID_INUSE */
 153#define encode_setclientid_confirm_maxsz \
 154                                (op_encode_hdr_maxsz + \
 155                                3 + (NFS4_VERIFIER_SIZE >> 2))
 156#define decode_setclientid_confirm_maxsz \
 157                                (op_decode_hdr_maxsz)
 158#define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
 159#define decode_lookup_maxsz     (op_decode_hdr_maxsz)
 160#define encode_share_access_maxsz \
 161                                (2)
 162#define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
 163#define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
 164#define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
 165#define encode_open_maxsz       (op_encode_hdr_maxsz + \
 166                                2 + encode_share_access_maxsz + 2 + \
 167                                open_owner_id_maxsz + \
 168                                encode_opentype_maxsz + \
 169                                encode_claim_null_maxsz)
 170#define decode_space_limit_maxsz        (3)
 171#define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
 172#define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
 173                                decode_space_limit_maxsz + \
 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#define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 212#define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1)
 213#define encode_write_maxsz      (op_encode_hdr_maxsz + \
 214                                 encode_stateid_maxsz + 4)
 215#define decode_write_maxsz      (op_decode_hdr_maxsz + \
 216                                 2 + decode_verifier_maxsz)
 217#define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
 218#define decode_commit_maxsz     (op_decode_hdr_maxsz + \
 219                                 decode_verifier_maxsz)
 220#define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 221                                nfs4_name_maxsz)
 222#define decode_remove_maxsz     (op_decode_hdr_maxsz + \
 223                                 decode_change_info_maxsz)
 224#define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 225                                2 * nfs4_name_maxsz)
 226#define decode_rename_maxsz     (op_decode_hdr_maxsz + \
 227                                 decode_change_info_maxsz + \
 228                                 decode_change_info_maxsz)
 229#define encode_link_maxsz       (op_encode_hdr_maxsz + \
 230                                nfs4_name_maxsz)
 231#define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
 232#define encode_lockowner_maxsz  (7)
 233#define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 234                                 7 + \
 235                                 1 + encode_stateid_maxsz + 1 + \
 236                                 encode_lockowner_maxsz)
 237#define decode_lock_denied_maxsz \
 238                                (8 + decode_lockowner_maxsz)
 239#define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 240                                 decode_lock_denied_maxsz)
 241#define encode_lockt_maxsz      (op_encode_hdr_maxsz + 5 + \
 242                                encode_lockowner_maxsz)
 243#define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 244                                 decode_lock_denied_maxsz)
 245#define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 246                                 encode_stateid_maxsz + \
 247                                 4)
 248#define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 249                                 decode_stateid_maxsz)
 250#define encode_release_lockowner_maxsz \
 251                                (op_encode_hdr_maxsz + \
 252                                 encode_lockowner_maxsz)
 253#define decode_release_lockowner_maxsz \
 254                                (op_decode_hdr_maxsz)
 255#define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 256#define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 257#define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 258                                1 + nfs4_name_maxsz + \
 259                                1 + \
 260                                nfs4_fattr_maxsz)
 261#define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 262#define encode_create_maxsz     (op_encode_hdr_maxsz + \
 263                                1 + 2 + nfs4_name_maxsz + \
 264                                encode_attrs_maxsz)
 265#define decode_create_maxsz     (op_decode_hdr_maxsz + \
 266                                decode_change_info_maxsz + \
 267                                nfs4_fattr_bitmap_maxsz)
 268#define encode_statfs_maxsz     (encode_getattr_maxsz)
 269#define decode_statfs_maxsz     (decode_getattr_maxsz)
 270#define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 271#define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 272#define encode_getacl_maxsz     (encode_getattr_maxsz)
 273#define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 274                                 nfs4_fattr_bitmap_maxsz + 1)
 275#define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 276                                 encode_stateid_maxsz + 3)
 277#define decode_setacl_maxsz     (decode_setattr_maxsz)
 278#define encode_fs_locations_maxsz \
 279                                (encode_getattr_maxsz)
 280#define decode_fs_locations_maxsz \
 281                                (0)
 282#define encode_secinfo_maxsz    (op_encode_hdr_maxsz + nfs4_name_maxsz)
 283#define decode_secinfo_maxsz    (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
 284
 285#if defined(CONFIG_NFS_V4_1)
 286#define NFS4_MAX_MACHINE_NAME_LEN (64)
 287#define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \
 288                         sizeof(utsname()->version) + sizeof(utsname()->machine) + 8)
 289
 290#define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
 291                                encode_verifier_maxsz + \
 292                                1 /* co_ownerid.len */ + \
 293                                /* eia_clientowner */ \
 294                                1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 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_getdeviceinfo_maxsz (op_encode_hdr_maxsz + \
 371                                XDR_QUADLEN(NFS4_DEVICEID4_SIZE) + \
 372                                1 /* layout type */ + \
 373                                1 /* maxcount */ + \
 374                                1 /* bitmap size */ + \
 375                                1 /* notification bitmap length */ + \
 376                                1 /* notification bitmap, word 0 */)
 377#define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
 378                                1 /* layout type */ + \
 379                                1 /* opaque devaddr4 length */ + \
 380                                  /* devaddr4 payload is read into page */ \
 381                                1 /* notification bitmap length */ + \
 382                                1 /* notification bitmap, word 0 */)
 383#define encode_layoutget_maxsz  (op_encode_hdr_maxsz + 10 + \
 384                                encode_stateid_maxsz)
 385#define decode_layoutget_maxsz  (op_decode_hdr_maxsz + 8 + \
 386                                decode_stateid_maxsz + \
 387                                XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
 388#define encode_layoutcommit_maxsz (op_encode_hdr_maxsz +          \
 389                                2 /* offset */ + \
 390                                2 /* length */ + \
 391                                1 /* reclaim */ + \
 392                                encode_stateid_maxsz + \
 393                                1 /* new offset (true) */ + \
 394                                2 /* last byte written */ + \
 395                                1 /* nt_timechanged (false) */ + \
 396                                1 /* layoutupdate4 layout type */ + \
 397                                1 /* layoutupdate4 opaqueue len */)
 398                                  /* the actual content of layoutupdate4 should
 399                                     be allocated by drivers and spliced in
 400                                     using xdr_write_pages */
 401#define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
 402#define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
 403                                encode_stateid_maxsz + \
 404                                1 + \
 405                                XDR_QUADLEN(NFS4_OPAQUE_LIMIT))
 406#define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
 407                                1 + decode_stateid_maxsz)
 408#define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
 409#define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
 410#define encode_test_stateid_maxsz       (op_encode_hdr_maxsz + 2 + \
 411                                         XDR_QUADLEN(NFS4_STATEID_SIZE))
 412#define decode_test_stateid_maxsz       (op_decode_hdr_maxsz + 2 + 1)
 413#define encode_free_stateid_maxsz       (op_encode_hdr_maxsz + 1 + \
 414                                         XDR_QUADLEN(NFS4_STATEID_SIZE))
 415#define decode_free_stateid_maxsz       (op_decode_hdr_maxsz)
 416#else /* CONFIG_NFS_V4_1 */
 417#define encode_sequence_maxsz   0
 418#define decode_sequence_maxsz   0
 419#define encode_layoutreturn_maxsz 0
 420#define decode_layoutreturn_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_layoutreturn_maxsz + \
 506                                 encode_open_downgrade_maxsz)
 507#define NFS4_dec_open_downgrade_sz \
 508                                (compound_decode_hdr_maxsz + \
 509                                 decode_sequence_maxsz + \
 510                                 decode_putfh_maxsz + \
 511                                 decode_layoutreturn_maxsz + \
 512                                 decode_open_downgrade_maxsz)
 513#define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 514                                 encode_sequence_maxsz + \
 515                                 encode_putfh_maxsz + \
 516                                 encode_layoutreturn_maxsz + \
 517                                 encode_close_maxsz + \
 518                                 encode_getattr_maxsz)
 519#define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 520                                 decode_sequence_maxsz + \
 521                                 decode_putfh_maxsz + \
 522                                 decode_layoutreturn_maxsz + \
 523                                 decode_close_maxsz + \
 524                                 decode_getattr_maxsz)
 525#define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 526                                 encode_sequence_maxsz + \
 527                                 encode_putfh_maxsz + \
 528                                 encode_setattr_maxsz + \
 529                                 encode_getattr_maxsz)
 530#define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 531                                 decode_sequence_maxsz + \
 532                                 decode_putfh_maxsz + \
 533                                 decode_setattr_maxsz + \
 534                                 decode_getattr_maxsz)
 535#define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 536                                encode_sequence_maxsz + \
 537                                encode_putfh_maxsz + \
 538                                encode_fsinfo_maxsz)
 539#define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 540                                decode_sequence_maxsz + \
 541                                decode_putfh_maxsz + \
 542                                decode_fsinfo_maxsz)
 543#define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 544                                encode_renew_maxsz)
 545#define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 546                                decode_renew_maxsz)
 547#define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 548                                encode_setclientid_maxsz)
 549#define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 550                                decode_setclientid_maxsz)
 551#define NFS4_enc_setclientid_confirm_sz \
 552                                (compound_encode_hdr_maxsz + \
 553                                encode_setclientid_confirm_maxsz)
 554#define NFS4_dec_setclientid_confirm_sz \
 555                                (compound_decode_hdr_maxsz + \
 556                                decode_setclientid_confirm_maxsz)
 557#define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 558                                encode_sequence_maxsz + \
 559                                encode_putfh_maxsz + \
 560                                encode_lock_maxsz)
 561#define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 562                                decode_sequence_maxsz + \
 563                                decode_putfh_maxsz + \
 564                                decode_lock_maxsz)
 565#define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 566                                encode_sequence_maxsz + \
 567                                encode_putfh_maxsz + \
 568                                encode_lockt_maxsz)
 569#define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 570                                 decode_sequence_maxsz + \
 571                                 decode_putfh_maxsz + \
 572                                 decode_lockt_maxsz)
 573#define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 574                                encode_sequence_maxsz + \
 575                                encode_putfh_maxsz + \
 576                                encode_locku_maxsz)
 577#define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 578                                decode_sequence_maxsz + \
 579                                decode_putfh_maxsz + \
 580                                decode_locku_maxsz)
 581#define NFS4_enc_release_lockowner_sz \
 582                                (compound_encode_hdr_maxsz + \
 583                                 encode_lockowner_maxsz)
 584#define NFS4_dec_release_lockowner_sz \
 585                                (compound_decode_hdr_maxsz + \
 586                                 decode_lockowner_maxsz)
 587#define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 588                                encode_sequence_maxsz + \
 589                                encode_putfh_maxsz + \
 590                                encode_access_maxsz + \
 591                                encode_getattr_maxsz)
 592#define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 593                                decode_sequence_maxsz + \
 594                                decode_putfh_maxsz + \
 595                                decode_access_maxsz + \
 596                                decode_getattr_maxsz)
 597#define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 598                                encode_sequence_maxsz + \
 599                                encode_putfh_maxsz + \
 600                                encode_getattr_maxsz + \
 601                                encode_renew_maxsz)
 602#define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 603                                decode_sequence_maxsz + \
 604                                decode_putfh_maxsz + \
 605                                decode_getattr_maxsz + \
 606                                decode_renew_maxsz)
 607#define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 608                                encode_sequence_maxsz + \
 609                                encode_putfh_maxsz + \
 610                                encode_lookup_maxsz + \
 611                                encode_getattr_maxsz + \
 612                                encode_getfh_maxsz)
 613#define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 614                                decode_sequence_maxsz + \
 615                                decode_putfh_maxsz + \
 616                                decode_lookup_maxsz + \
 617                                decode_getattr_maxsz + \
 618                                decode_getfh_maxsz)
 619#define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 620                                encode_sequence_maxsz + \
 621                                encode_putrootfh_maxsz + \
 622                                encode_getattr_maxsz + \
 623                                encode_getfh_maxsz)
 624#define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 625                                decode_sequence_maxsz + \
 626                                decode_putrootfh_maxsz + \
 627                                decode_getattr_maxsz + \
 628                                decode_getfh_maxsz)
 629#define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 630                                encode_sequence_maxsz + \
 631                                encode_putfh_maxsz + \
 632                                encode_remove_maxsz)
 633#define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 634                                decode_sequence_maxsz + \
 635                                decode_putfh_maxsz + \
 636                                decode_remove_maxsz)
 637#define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 638                                encode_sequence_maxsz + \
 639                                encode_putfh_maxsz + \
 640                                encode_savefh_maxsz + \
 641                                encode_putfh_maxsz + \
 642                                encode_rename_maxsz)
 643#define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 644                                decode_sequence_maxsz + \
 645                                decode_putfh_maxsz + \
 646                                decode_savefh_maxsz + \
 647                                decode_putfh_maxsz + \
 648                                decode_rename_maxsz)
 649#define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 650                                encode_sequence_maxsz + \
 651                                encode_putfh_maxsz + \
 652                                encode_savefh_maxsz + \
 653                                encode_putfh_maxsz + \
 654                                encode_link_maxsz + \
 655                                encode_restorefh_maxsz + \
 656                                encode_getattr_maxsz)
 657#define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 658                                decode_sequence_maxsz + \
 659                                decode_putfh_maxsz + \
 660                                decode_savefh_maxsz + \
 661                                decode_putfh_maxsz + \
 662                                decode_link_maxsz + \
 663                                decode_restorefh_maxsz + \
 664                                decode_getattr_maxsz)
 665#define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 666                                encode_sequence_maxsz + \
 667                                encode_putfh_maxsz + \
 668                                encode_symlink_maxsz + \
 669                                encode_getattr_maxsz + \
 670                                encode_getfh_maxsz)
 671#define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 672                                decode_sequence_maxsz + \
 673                                decode_putfh_maxsz + \
 674                                decode_symlink_maxsz + \
 675                                decode_getattr_maxsz + \
 676                                decode_getfh_maxsz)
 677#define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 678                                encode_sequence_maxsz + \
 679                                encode_putfh_maxsz + \
 680                                encode_create_maxsz + \
 681                                encode_getfh_maxsz + \
 682                                encode_getattr_maxsz)
 683#define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 684                                decode_sequence_maxsz + \
 685                                decode_putfh_maxsz + \
 686                                decode_create_maxsz + \
 687                                decode_getfh_maxsz + \
 688                                decode_getattr_maxsz)
 689#define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 690                                encode_sequence_maxsz + \
 691                                encode_putfh_maxsz + \
 692                                encode_getattr_maxsz)
 693#define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 694                                decode_sequence_maxsz + \
 695                                decode_putfh_maxsz + \
 696                                decode_getattr_maxsz)
 697#define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 698                                encode_sequence_maxsz + \
 699                                encode_putfh_maxsz + \
 700                                encode_statfs_maxsz)
 701#define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 702                                decode_sequence_maxsz + \
 703                                decode_putfh_maxsz + \
 704                                decode_statfs_maxsz)
 705#define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 706                                encode_sequence_maxsz + \
 707                                encode_putfh_maxsz + \
 708                                encode_getattr_maxsz)
 709#define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 710                                decode_sequence_maxsz + \
 711                                decode_putfh_maxsz + \
 712                                decode_getattr_maxsz)
 713#define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 714                                encode_sequence_maxsz + \
 715                                encode_putfh_maxsz + \
 716                                encode_layoutreturn_maxsz + \
 717                                encode_delegreturn_maxsz + \
 718                                encode_getattr_maxsz)
 719#define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 720                                decode_sequence_maxsz + \
 721                                decode_putfh_maxsz + \
 722                                decode_layoutreturn_maxsz + \
 723                                decode_delegreturn_maxsz + \
 724                                decode_getattr_maxsz)
 725#define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 726                                encode_sequence_maxsz + \
 727                                encode_putfh_maxsz + \
 728                                encode_getacl_maxsz)
 729#define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 730                                decode_sequence_maxsz + \
 731                                decode_putfh_maxsz + \
 732                                decode_getacl_maxsz)
 733#define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 734                                encode_sequence_maxsz + \
 735                                encode_putfh_maxsz + \
 736                                encode_setacl_maxsz)
 737#define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 738                                decode_sequence_maxsz + \
 739                                decode_putfh_maxsz + \
 740                                decode_setacl_maxsz)
 741#define NFS4_enc_fs_locations_sz \
 742                                (compound_encode_hdr_maxsz + \
 743                                 encode_sequence_maxsz + \
 744                                 encode_putfh_maxsz + \
 745                                 encode_lookup_maxsz + \
 746                                 encode_fs_locations_maxsz + \
 747                                 encode_renew_maxsz)
 748#define NFS4_dec_fs_locations_sz \
 749                                (compound_decode_hdr_maxsz + \
 750                                 decode_sequence_maxsz + \
 751                                 decode_putfh_maxsz + \
 752                                 decode_lookup_maxsz + \
 753                                 decode_fs_locations_maxsz + \
 754                                 decode_renew_maxsz)
 755#define NFS4_enc_secinfo_sz     (compound_encode_hdr_maxsz + \
 756                                encode_sequence_maxsz + \
 757                                encode_putfh_maxsz + \
 758                                encode_secinfo_maxsz)
 759#define NFS4_dec_secinfo_sz     (compound_decode_hdr_maxsz + \
 760                                decode_sequence_maxsz + \
 761                                decode_putfh_maxsz + \
 762                                decode_secinfo_maxsz)
 763#define NFS4_enc_fsid_present_sz \
 764                                (compound_encode_hdr_maxsz + \
 765                                 encode_sequence_maxsz + \
 766                                 encode_putfh_maxsz + \
 767                                 encode_getfh_maxsz + \
 768                                 encode_renew_maxsz)
 769#define NFS4_dec_fsid_present_sz \
 770                                (compound_decode_hdr_maxsz + \
 771                                 decode_sequence_maxsz + \
 772                                 decode_putfh_maxsz + \
 773                                 decode_getfh_maxsz + \
 774                                 decode_renew_maxsz)
 775#if defined(CONFIG_NFS_V4_1)
 776#define NFS4_enc_bind_conn_to_session_sz \
 777                                (compound_encode_hdr_maxsz + \
 778                                 encode_bind_conn_to_session_maxsz)
 779#define NFS4_dec_bind_conn_to_session_sz \
 780                                (compound_decode_hdr_maxsz + \
 781                                 decode_bind_conn_to_session_maxsz)
 782#define NFS4_enc_exchange_id_sz \
 783                                (compound_encode_hdr_maxsz + \
 784                                 encode_exchange_id_maxsz)
 785#define NFS4_dec_exchange_id_sz \
 786                                (compound_decode_hdr_maxsz + \
 787                                 decode_exchange_id_maxsz)
 788#define NFS4_enc_create_session_sz \
 789                                (compound_encode_hdr_maxsz + \
 790                                 encode_create_session_maxsz)
 791#define NFS4_dec_create_session_sz \
 792                                (compound_decode_hdr_maxsz + \
 793                                 decode_create_session_maxsz)
 794#define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
 795                                         encode_destroy_session_maxsz)
 796#define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
 797                                         decode_destroy_session_maxsz)
 798#define NFS4_enc_destroy_clientid_sz    (compound_encode_hdr_maxsz + \
 799                                         encode_destroy_clientid_maxsz)
 800#define NFS4_dec_destroy_clientid_sz    (compound_decode_hdr_maxsz + \
 801                                         decode_destroy_clientid_maxsz)
 802#define NFS4_enc_sequence_sz \
 803                                (compound_decode_hdr_maxsz + \
 804                                 encode_sequence_maxsz)
 805#define NFS4_dec_sequence_sz \
 806                                (compound_decode_hdr_maxsz + \
 807                                 decode_sequence_maxsz)
 808#define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
 809                                         encode_sequence_maxsz + \
 810                                         encode_putrootfh_maxsz + \
 811                                         encode_fsinfo_maxsz)
 812#define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
 813                                         decode_sequence_maxsz + \
 814                                         decode_putrootfh_maxsz + \
 815                                         decode_fsinfo_maxsz)
 816#define NFS4_enc_reclaim_complete_sz    (compound_encode_hdr_maxsz + \
 817                                         encode_sequence_maxsz + \
 818                                         encode_reclaim_complete_maxsz)
 819#define NFS4_dec_reclaim_complete_sz    (compound_decode_hdr_maxsz + \
 820                                         decode_sequence_maxsz + \
 821                                         decode_reclaim_complete_maxsz)
 822#define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
 823                                encode_sequence_maxsz +\
 824                                encode_getdeviceinfo_maxsz)
 825#define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
 826                                decode_sequence_maxsz + \
 827                                decode_getdeviceinfo_maxsz)
 828#define NFS4_enc_layoutget_sz   (compound_encode_hdr_maxsz + \
 829                                encode_sequence_maxsz + \
 830                                encode_putfh_maxsz +        \
 831                                encode_layoutget_maxsz)
 832#define NFS4_dec_layoutget_sz   (compound_decode_hdr_maxsz + \
 833                                decode_sequence_maxsz + \
 834                                decode_putfh_maxsz +        \
 835                                decode_layoutget_maxsz)
 836#define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
 837                                encode_sequence_maxsz +\
 838                                encode_putfh_maxsz + \
 839                                encode_layoutcommit_maxsz + \
 840                                encode_getattr_maxsz)
 841#define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
 842                                decode_sequence_maxsz + \
 843                                decode_putfh_maxsz + \
 844                                decode_layoutcommit_maxsz + \
 845                                decode_getattr_maxsz)
 846#define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
 847                                encode_sequence_maxsz + \
 848                                encode_putfh_maxsz + \
 849                                encode_layoutreturn_maxsz)
 850#define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
 851                                decode_sequence_maxsz + \
 852                                decode_putfh_maxsz + \
 853                                decode_layoutreturn_maxsz)
 854#define NFS4_enc_secinfo_no_name_sz     (compound_encode_hdr_maxsz + \
 855                                        encode_sequence_maxsz + \
 856                                        encode_putrootfh_maxsz +\
 857                                        encode_secinfo_no_name_maxsz)
 858#define NFS4_dec_secinfo_no_name_sz     (compound_decode_hdr_maxsz + \
 859                                        decode_sequence_maxsz + \
 860                                        decode_putrootfh_maxsz + \
 861                                        decode_secinfo_no_name_maxsz)
 862#define NFS4_enc_test_stateid_sz        (compound_encode_hdr_maxsz + \
 863                                         encode_sequence_maxsz + \
 864                                         encode_test_stateid_maxsz)
 865#define NFS4_dec_test_stateid_sz        (compound_decode_hdr_maxsz + \
 866                                         decode_sequence_maxsz + \
 867                                         decode_test_stateid_maxsz)
 868#define NFS4_enc_free_stateid_sz        (compound_encode_hdr_maxsz + \
 869                                         encode_sequence_maxsz + \
 870                                         encode_free_stateid_maxsz)
 871#define NFS4_dec_free_stateid_sz        (compound_decode_hdr_maxsz + \
 872                                         decode_sequence_maxsz + \
 873                                         decode_free_stateid_maxsz)
 874
 875const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 876                                      compound_encode_hdr_maxsz +
 877                                      encode_sequence_maxsz +
 878                                      encode_putfh_maxsz +
 879                                      encode_getattr_maxsz) *
 880                                     XDR_UNIT);
 881
 882const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 883                                     compound_decode_hdr_maxsz +
 884                                     decode_sequence_maxsz +
 885                                     decode_putfh_maxsz) *
 886                                    XDR_UNIT);
 887
 888const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH +
 889                                           compound_decode_hdr_maxsz +
 890                                           decode_sequence_maxsz) *
 891                                          XDR_UNIT);
 892EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead);
 893#endif /* CONFIG_NFS_V4_1 */
 894
 895static const umode_t nfs_type2fmt[] = {
 896        [NF4BAD] = 0,
 897        [NF4REG] = S_IFREG,
 898        [NF4DIR] = S_IFDIR,
 899        [NF4BLK] = S_IFBLK,
 900        [NF4CHR] = S_IFCHR,
 901        [NF4LNK] = S_IFLNK,
 902        [NF4SOCK] = S_IFSOCK,
 903        [NF4FIFO] = S_IFIFO,
 904        [NF4ATTRDIR] = 0,
 905        [NF4NAMEDATTR] = 0,
 906};
 907
 908struct compound_hdr {
 909        int32_t         status;
 910        uint32_t        nops;
 911        __be32 *        nops_p;
 912        uint32_t        taglen;
 913        char *          tag;
 914        uint32_t        replen;         /* expected reply words */
 915        u32             minorversion;
 916};
 917
 918static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
 919{
 920        __be32 *p = xdr_reserve_space(xdr, nbytes);
 921        BUG_ON(!p);
 922        return p;
 923}
 924
 925static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
 926{
 927        __be32 *p;
 928
 929        p = xdr_reserve_space(xdr, len);
 930        xdr_encode_opaque_fixed(p, buf, len);
 931}
 932
 933static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 934{
 935        __be32 *p;
 936
 937        p = reserve_space(xdr, 4 + len);
 938        xdr_encode_opaque(p, str, len);
 939}
 940
 941static void encode_uint32(struct xdr_stream *xdr, u32 n)
 942{
 943        __be32 *p;
 944
 945        p = reserve_space(xdr, 4);
 946        *p = cpu_to_be32(n);
 947}
 948
 949static void encode_uint64(struct xdr_stream *xdr, u64 n)
 950{
 951        __be32 *p;
 952
 953        p = reserve_space(xdr, 8);
 954        xdr_encode_hyper(p, n);
 955}
 956
 957static void encode_nfs4_seqid(struct xdr_stream *xdr,
 958                const struct nfs_seqid *seqid)
 959{
 960        if (seqid != NULL)
 961                encode_uint32(xdr, seqid->sequence->counter);
 962        else
 963                encode_uint32(xdr, 0);
 964}
 965
 966static void encode_compound_hdr(struct xdr_stream *xdr,
 967                                struct rpc_rqst *req,
 968                                struct compound_hdr *hdr)
 969{
 970        __be32 *p;
 971        struct rpc_auth *auth = req->rq_cred->cr_auth;
 972
 973        /* initialize running count of expected bytes in reply.
 974         * NOTE: the replied tag SHOULD be the same is the one sent,
 975         * but this is not required as a MUST for the server to do so. */
 976        hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
 977
 978        WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
 979        encode_string(xdr, hdr->taglen, hdr->tag);
 980        p = reserve_space(xdr, 8);
 981        *p++ = cpu_to_be32(hdr->minorversion);
 982        hdr->nops_p = p;
 983        *p = cpu_to_be32(hdr->nops);
 984}
 985
 986static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
 987                uint32_t replen,
 988                struct compound_hdr *hdr)
 989{
 990        encode_uint32(xdr, op);
 991        hdr->nops++;
 992        hdr->replen += replen;
 993}
 994
 995static void encode_nops(struct compound_hdr *hdr)
 996{
 997        WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
 998        *hdr->nops_p = htonl(hdr->nops);
 999}
1000

1001static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1002{
1003        encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
1004}
1005
1006static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
1007{
1008        encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
1009}
1010
1011static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
1012                                const struct nfs4_label *label,
1013                                const struct nfs_server *server,
1014                                bool excl_check, const umode_t *umask)
1015{
1016        char owner_name[IDMAP_NAMESZ];
1017        char owner_group[IDMAP_NAMESZ];
1018        int owner_namelen = 0;
1019        int owner_grouplen = 0;
1020        __be32 *p;
1021        unsigned i;
1022        uint32_t len = 0;
1023        uint32_t bmval_len;
1024        uint32_t bmval[3] = { 0 };
1025
1026        /*
1027         * We reserve enough space to write the entire attribute buffer at once.
1028         */
1029        if (iap->ia_valid & ATTR_SIZE) {
1030                bmval[0] |= FATTR4_WORD0_SIZE;
1031                len += 8;
1032        }
1033        if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
1034                umask = NULL;
1035        if (iap->ia_valid & ATTR_MODE) {
1036                if (umask) {
1037                        bmval[2] |= FATTR4_WORD2_MODE_UMASK;
1038                        len += 8;
1039                } else {
1040                        bmval[1] |= FATTR4_WORD1_MODE;
1041                        len += 4;
1042                }
1043        }
1044        if (iap->ia_valid & ATTR_UID) {
1045                owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1046                if (owner_namelen < 0) {
1047                        dprintk("nfs: couldn't resolve uid %d to string\n",
1048                                        from_kuid(&init_user_ns, iap->ia_uid));
1049                        /* XXX */
1050                        strcpy(owner_name, "nobody");
1051                        owner_namelen = sizeof("nobody") - 1;
1052                        /* goto out; */
1053                }
1054                bmval[1] |= FATTR4_WORD1_OWNER;
1055                len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1056        }
1057        if (iap->ia_valid & ATTR_GID) {
1058                owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1059                if (owner_grouplen < 0) {
1060                        dprintk("nfs: couldn't resolve gid %d to string\n",
1061                                        from_kgid(&init_user_ns, iap->ia_gid));
1062                        strcpy(owner_group, "nobody");
1063                        owner_grouplen = sizeof("nobody") - 1;
1064                        /* goto out; */
1065                }
1066                bmval[1] |= FATTR4_WORD1_OWNER_GROUP;
1067                len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1068        }
1069        if (iap->ia_valid & ATTR_ATIME_SET) {
1070                bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1071                len += 16;
1072        } else if (iap->ia_valid & ATTR_ATIME) {
1073                bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1074                len += 4;
1075        }
1076        if (iap->ia_valid & ATTR_MTIME_SET) {
1077                bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1078                len += 16;
1079        } else if (iap->ia_valid & ATTR_MTIME) {
1080                bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1081                len += 4;
1082        }
1083
1084        if (excl_check) {
1085                const u32 *excl_bmval = server->exclcreat_bitmask;
1086                bmval[0] &= excl_bmval[0];
1087                bmval[1] &= excl_bmval[1];
1088                bmval[2] &= excl_bmval[2];
1089
1090                if (!(excl_bmval[2] & FATTR4_WORD2_SECURITY_LABEL))
1091                        label = NULL;
1092        }
1093
1094        if (label) {
1095                len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1096                bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
1097        }
1098
1099        if (bmval[2] != 0)
1100                bmval_len = 3;
1101        else if (bmval[1] != 0)
1102                bmval_len = 2;
1103        else
1104                bmval_len = 1;
1105
1106        p = reserve_space(xdr, 4 + (bmval_len << 2) + 4 + len);
1107
1108        *p++ = cpu_to_be32(bmval_len);
1109        for (i = 0; i < bmval_len; i++)
1110                *p++ = cpu_to_be32(bmval[i]);
1111        *p++ = cpu_to_be32(len);
1112
1113        if (bmval[0] & FATTR4_WORD0_SIZE)
1114                p = xdr_encode_hyper(p, iap->ia_size);
1115        if (bmval[1] & FATTR4_WORD1_MODE)
1116                *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1117        if (bmval[1] & FATTR4_WORD1_OWNER)
1118                p = xdr_encode_opaque(p, owner_name, owner_namelen);
1119        if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
1120                p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1121        if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1122                if (iap->ia_valid & ATTR_ATIME_SET) {
1123                        *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1124                        p = xdr_encode_hyper(p, (s64)iap->ia_atime.tv_sec);
1125                        *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
1126                } else
1127                        *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1128        }
1129        if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1130                if (iap->ia_valid & ATTR_MTIME_SET) {
1131                        *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1132                        p = xdr_encode_hyper(p, (s64)iap->ia_mtime.tv_sec);
1133                        *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1134                } else
1135                        *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1136        }
1137        if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
1138                *p++ = cpu_to_be32(label->lfs);
1139                *p++ = cpu_to_be32(label->pi);
1140                *p++ = cpu_to_be32(label->len);
1141                p = xdr_encode_opaque_fixed(p, label->label, label->len);
1142        }
1143        if (bmval[2] & FATTR4_WORD2_MODE_UMASK) {
1144                *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1145                *p++ = cpu_to_be32(*umask);
1146        }
1147
1148/* out: */
1149}
1150
1151static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1152{
1153        encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1154        encode_uint32(xdr, access);
1155}
1156
1157static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1158{
1159        encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1160        encode_nfs4_seqid(xdr, arg->seqid);
1161        encode_nfs4_stateid(xdr, &arg->stateid);
1162}
1163
1164static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1165{
1166        __be32 *p;
1167
1168        encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1169        p = reserve_space(xdr, 12);
1170        p = xdr_encode_hyper(p, args->offset);
1171        *p = cpu_to_be32(args->count);
1172}
1173
1174static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1175{
1176        __be32 *p;
1177
1178        encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1179        encode_uint32(xdr, create->ftype);
1180
1181        switch (create->ftype) {
1182        case NF4LNK:
1183                p = reserve_space(xdr, 4);
1184                *p = cpu_to_be32(create->u.symlink.len);
1185                xdr_write_pages(xdr, create->u.symlink.pages, 0,
1186                                create->u.symlink.len);
1187                xdr->buf->flags |= XDRBUF_WRITE;
1188                break;
1189
1190        case NF4BLK: case NF4CHR:
1191                p = reserve_space(xdr, 8);
1192                *p++ = cpu_to_be32(create->u.device.specdata1);
1193                *p = cpu_to_be32(create->u.device.specdata2);
1194                break;
1195
1196        default:
1197                break;
1198        }
1199
1200        encode_string(xdr, create->name->len, create->name->name);
1201        encode_attrs(xdr, create->attrs, create->label, create->server, false,
1202                     &create->umask);
1203}
1204
1205static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1206{
1207        __be32 *p;
1208
1209        encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1210        p = reserve_space(xdr, 8);
1211        *p++ = cpu_to_be32(1);
1212        *p = cpu_to_be32(bitmap);
1213}
1214
1215static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1216{
1217        __be32 *p;
1218
1219        encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1220        p = reserve_space(xdr, 12);
1221        *p++ = cpu_to_be32(2);
1222        *p++ = cpu_to_be32(bm0);
1223        *p = cpu_to_be32(bm1);
1224}
1225
1226static void
1227encode_getattr_three(struct xdr_stream *xdr,
1228                     uint32_t bm0, uint32_t bm1, uint32_t bm2,
1229                     struct compound_hdr *hdr)
1230{
1231        __be32 *p;
1232
1233        encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1234        if (bm2) {
1235                p = reserve_space(xdr, 16);
1236                *p++ = cpu_to_be32(3);
1237                *p++ = cpu_to_be32(bm0);
1238                *p++ = cpu_to_be32(bm1);
1239                *p = cpu_to_be32(bm2);
1240        } else if (bm1) {
1241                p = reserve_space(xdr, 12);
1242                *p++ = cpu_to_be32(2);
1243                *p++ = cpu_to_be32(bm0);
1244                *p = cpu_to_be32(bm1);
1245        } else {
1246                p = reserve_space(xdr, 8);
1247                *p++ = cpu_to_be32(1);
1248                *p = cpu_to_be32(bm0);
1249        }
1250}
1251
1252static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1253{
1254        encode_getattr_three(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1255                           bitmask[1] & nfs4_fattr_bitmap[1],
1256                           bitmask[2] & nfs4_fattr_bitmap[2],
1257                           hdr);
1258}
1259
1260static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1261                                 const u32 *open_bitmap,
1262                                 struct compound_hdr *hdr)
1263{
1264        encode_getattr_three(xdr,
1265                             bitmask[0] & open_bitmap[0],
1266                             bitmask[1] & open_bitmap[1],
1267                             bitmask[2] & open_bitmap[2],
1268                             hdr);
1269}
1270
1271static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1272{
1273        encode_getattr_three(xdr,
1274                             bitmask[0] & nfs4_fsinfo_bitmap[0],
1275                             bitmask[1] & nfs4_fsinfo_bitmap[1],
1276                             bitmask[2] & nfs4_fsinfo_bitmap[2],
1277                             hdr);
1278}
1279
1280static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1281{
1282        encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1283                           bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1284}
1285
1286static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1287{
1288        encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1289}
1290
1291static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1292{
1293        encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1294        encode_string(xdr, name->len, name->name);
1295}
1296
1297static inline int nfs4_lock_type(struct file_lock *fl, int block)
1298{
1299        if (fl->fl_type == F_RDLCK)
1300                return block ? NFS4_READW_LT : NFS4_READ_LT;
1301        return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1302}
1303
1304static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1305{
1306        if (fl->fl_end == OFFSET_MAX)
1307                return ~(uint64_t)0;
1308        return fl->fl_end - fl->fl_start + 1;
1309}
1310
1311static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1312{
1313        __be32 *p;
1314
1315        p = reserve_space(xdr, 32);
1316        p = xdr_encode_hyper(p, lowner->clientid);
1317        *p++ = cpu_to_be32(20);
1318        p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1319        *p++ = cpu_to_be32(lowner->s_dev);
1320        xdr_encode_hyper(p, lowner->id);
1321}
1322
1323/*
1324 * opcode,type,reclaim,offset,length,new_lock_owner = 32
1325 * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1326 */
1327static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1328{
1329        __be32 *p;
1330
1331        encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1332        p = reserve_space(xdr, 28);
1333        *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1334        *p++ = cpu_to_be32(args->reclaim);
1335        p = xdr_encode_hyper(p, args->fl->fl_start);
1336        p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1337        *p = cpu_to_be32(args->new_lock_owner);
1338        if (args->new_lock_owner){
1339                encode_nfs4_seqid(xdr, args->open_seqid);
1340                encode_nfs4_stateid(xdr, &args->open_stateid);
1341                encode_nfs4_seqid(xdr, args->lock_seqid);
1342                encode_lockowner(xdr, &args->lock_owner);
1343        }
1344        else {
1345                encode_nfs4_stateid(xdr, &args->lock_stateid);
1346                encode_nfs4_seqid(xdr, args->lock_seqid);
1347        }
1348}
1349
1350static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1351{
1352        __be32 *p;
1353
1354        encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1355        p = reserve_space(xdr, 20);
1356        *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1357        p = xdr_encode_hyper(p, args->fl->fl_start);
1358        p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1359        encode_lockowner(xdr, &args->lock_owner);
1360}
1361
1362static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1363{
1364        __be32 *p;
1365
1366        encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1367        encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1368        encode_nfs4_seqid(xdr, args->seqid);
1369        encode_nfs4_stateid(xdr, &args->stateid);
1370        p = reserve_space(xdr, 16);
1371        p = xdr_encode_hyper(p, args->fl->fl_start);
1372        xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1373}
1374
1375static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1376{
1377        encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1378        encode_lockowner(xdr, lowner);
1379}
1380
1381static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1382{
1383        encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1384        encode_string(xdr, name->len, name->name);
1385}
1386
1387static void encode_share_access(struct xdr_stream *xdr, u32 share_access)
1388{
1389        __be32 *p;
1390
1391        p = reserve_space(xdr, 8);
1392        *p++ = cpu_to_be32(share_access);
1393        *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1394}
1395
1396static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1397{
1398        __be32 *p;
1399 /*
1400 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1401 * owner 4 = 32
1402 */
1403        encode_nfs4_seqid(xdr, arg->seqid);
1404        encode_share_access(xdr, arg->share_access);
1405        p = reserve_space(xdr, 36);
1406        p = xdr_encode_hyper(p, arg->clientid);
1407        *p++ = cpu_to_be32(24);
1408        p = xdr_encode_opaque_fixed(p, "open id:", 8);
1409        *p++ = cpu_to_be32(arg->server->s_dev);
1410        *p++ = cpu_to_be32(arg->id.uniquifier);
1411        xdr_encode_hyper(p, arg->id.create_time);
1412}
1413
1414static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1415{
1416        __be32 *p;
1417
1418        p = reserve_space(xdr, 4);
1419        switch(arg->createmode) {
1420        case NFS4_CREATE_UNCHECKED:
1421                *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1422                encode_attrs(xdr, arg->u.attrs, arg->label, arg->server, false,
1423                             &arg->umask);
1424                break;
1425        case NFS4_CREATE_GUARDED:
1426                *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1427                encode_attrs(xdr, arg->u.attrs, arg->label, arg->server, false,
1428                             &arg->umask);
1429                break;
1430        case NFS4_CREATE_EXCLUSIVE:
1431                *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1432                encode_nfs4_verifier(xdr, &arg->u.verifier);
1433                break;
1434        case NFS4_CREATE_EXCLUSIVE4_1:
1435                *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1436                encode_nfs4_verifier(xdr, &arg->u.verifier);
1437                encode_attrs(xdr, arg->u.attrs, arg->label, arg->server, true,
1438                             &arg->umask);
1439        }
1440}
1441
1442static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1443{
1444        __be32 *p;
1445
1446        p = reserve_space(xdr, 4);
1447        switch (arg->open_flags & O_CREAT) {
1448        case 0:
1449                *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1450                break;
1451        default:
1452                *p = cpu_to_be32(NFS4_OPEN_CREATE);
1453                encode_createmode(xdr, arg);
1454        }
1455}
1456
1457static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1458{
1459        __be32 *p;
1460
1461        p = reserve_space(xdr, 4);
1462        switch (delegation_type) {
1463        case 0:
1464                *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1465                break;
1466        case FMODE_READ:
1467                *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1468                break;
1469        case FMODE_WRITE|FMODE_READ:
1470                *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1471                break;
1472        default:
1473                BUG();
1474        }
1475}
1476
1477static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1478{
1479        __be32 *p;
1480
1481        p = reserve_space(xdr, 4);
1482        *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1483        encode_string(xdr, name->len, name->name);
1484}
1485
1486static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1487{
1488        __be32 *p;
1489
1490        p = reserve_space(xdr, 4);
1491        *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1492        encode_delegation_type(xdr, type);
1493}
1494
1495static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1496{
1497        __be32 *p;
1498
1499        p = reserve_space(xdr, 4);
1500        *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1501        encode_nfs4_stateid(xdr, stateid);
1502        encode_string(xdr, name->len, name->name);
1503}
1504
1505static inline void encode_claim_fh(struct xdr_stream *xdr)
1506{
1507        __be32 *p;
1508
1509        p = reserve_space(xdr, 4);
1510        *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1511}
1512
1513static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1514{
1515        __be32 *p;
1516
1517        p = reserve_space(xdr, 4);
1518        *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1519        encode_nfs4_stateid(xdr, stateid);
1520}
1521
1522static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1523{
1524        encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1525        encode_openhdr(xdr, arg);
1526        encode_opentype(xdr, arg);
1527        switch (arg->claim) {
1528        case NFS4_OPEN_CLAIM_NULL:
1529                encode_claim_null(xdr, arg->name);
1530                break;
1531        case NFS4_OPEN_CLAIM_PREVIOUS:
1532                encode_claim_previous(xdr, arg->u.delegation_type);
1533                break;
1534        case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1535                encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1536                break;
1537        case NFS4_OPEN_CLAIM_FH:
1538                encode_claim_fh(xdr);
1539                break;
1540        case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1541                encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1542                break;
1543        default:
1544                BUG();
1545        }
1546}
1547
1548static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1549{
1550        encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1551        encode_nfs4_stateid(xdr, arg->stateid);
1552        encode_nfs4_seqid(xdr, arg->seqid);
1553}
1554
1555static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1556{
1557        encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1558        encode_nfs4_stateid(xdr, &arg->stateid);
1559        encode_nfs4_seqid(xdr, arg->seqid);
1560        encode_share_access(xdr, arg->share_access);
1561}
1562
1563static void
1564encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1565{
1566        encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1567        encode_string(xdr, fh->size, fh->data);
1568}
1569
1570static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1571{
1572        encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1573}
1574
1575static void encode_read(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1576                        struct compound_hdr *hdr)
1577{
1578        __be32 *p;
1579
1580        encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1581        encode_nfs4_stateid(xdr, &args->stateid);
1582
1583        p = reserve_space(xdr, 12);
1584        p = xdr_encode_hyper(p, args->offset);
1585        *p = cpu_to_be32(args->count);
1586}
1587
1588static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1589{
1590        uint32_t attrs[3] = {
1591                FATTR4_WORD0_RDATTR_ERROR,
1592                FATTR4_WORD1_MOUNTED_ON_FILEID,
1593        };
1594        uint32_t dircount = readdir->count >> 1;
1595        __be32 *p, verf[2];
1596        uint32_t attrlen = 0;
1597        unsigned int i;
1598
1599        if (readdir->plus) {
1600                attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1601                        FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1602                attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1603                        FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1604                        FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1605                        FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1606                attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1607                dircount >>= 1;
1608        }
1609        /* Use mounted_on_fileid only if the server supports it */
1610        if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1611                attrs[0] |= FATTR4_WORD0_FILEID;
1612        for (i = 0; i < ARRAY_SIZE(attrs); i++) {
1613                attrs[i] &= readdir->bitmask[i];
1614                if (attrs[i] != 0)
1615                        attrlen = i+1;
1616        }
1617
1618        encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1619        encode_uint64(xdr, readdir->cookie);
1620        encode_nfs4_verifier(xdr, &readdir->verifier);
1621        p = reserve_space(xdr, 12 + (attrlen << 2));
1622        *p++ = cpu_to_be32(dircount);
1623        *p++ = cpu_to_be32(readdir->count);
1624        *p++ = cpu_to_be32(attrlen);
1625        for (i = 0; i < attrlen; i++)
1626                *p++ = cpu_to_be32(attrs[i]);
1627        memcpy(verf, readdir->verifier.data, sizeof(verf));
1628
1629        dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1630                        __func__,
1631                        (unsigned long long)readdir->cookie,
1632                        verf[0], verf[1],
1633                        attrs[0] & readdir->bitmask[0],
1634                        attrs[1] & readdir->bitmask[1],
1635                        attrs[2] & readdir->bitmask[2]);
1636}
1637
1638static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1639{
1640        encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1641}
1642
1643static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1644{
1645        encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1646        encode_string(xdr, name->len, name->name);
1647}
1648
1649static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1650{
1651        encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1652        encode_string(xdr, oldname->len, oldname->name);
1653        encode_string(xdr, newname->len, newname->name);
1654}
1655
1656static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1657                         struct compound_hdr *hdr)
1658{
1659        encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1660        encode_uint64(xdr, clid);
1661}
1662
1663static void
1664encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1665{
1666        encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1667}
1668
1669static void
1670encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1671{
1672        __be32 *p;
1673
1674        encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1675        encode_nfs4_stateid(xdr, &zero_stateid);
1676        p = reserve_space(xdr, 2*4);
1677        *p++ = cpu_to_be32(1);
1678        *p = cpu_to_be32(FATTR4_WORD0_ACL);
1679        p = reserve_space(xdr, 4);
1680        *p = cpu_to_be32(arg->acl_len);
1681        xdr_write_pages(xdr, arg->acl_pages, 0, arg->acl_len);
1682}
1683
1684static void
1685encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1686{
1687        encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1688}
1689
1690static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1691{
1692        encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1693        encode_nfs4_stateid(xdr, &arg->stateid);
1694        encode_attrs(xdr, arg->iap, arg->label, server, false, NULL);
1695}
1696
1697static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1698{
1699        __be32 *p;
1700
1701        encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1702        encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1703
1704        encode_string(xdr, strlen(setclientid->sc_clnt->cl_owner_id),
1705                        setclientid->sc_clnt->cl_owner_id);
1706        p = reserve_space(xdr, 4);
1707        *p = cpu_to_be32(setclientid->sc_prog);
1708        encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1709        encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1710        p = reserve_space(xdr, 4);
1711        *p = cpu_to_be32(setclientid->sc_clnt->cl_cb_ident);
1712}
1713
1714static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1715{
1716        encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1717                        decode_setclientid_confirm_maxsz, hdr);
1718        encode_uint64(xdr, arg->clientid);
1719        encode_nfs4_verifier(xdr, &arg->confirm);
1720}
1721
1722static void encode_write(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1723                         struct compound_hdr *hdr)
1724{
1725        __be32 *p;
1726
1727        encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1728        encode_nfs4_stateid(xdr, &args->stateid);
1729
1730        p = reserve_space(xdr, 16);
1731        p = xdr_encode_hyper(p, args->offset);
1732        *p++ = cpu_to_be32(args->stable);
1733        *p = cpu_to_be32(args->count);
1734
1735        xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1736}
1737
1738static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1739{
1740        encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1741        encode_nfs4_stateid(xdr, stateid);
1742}
1743
1744static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1745{
1746        encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1747        encode_string(xdr, name->len, name->name);
1748}
1749
1750#if defined(CONFIG_NFS_V4_1)
1751/* NFSv4.1 operations */
1752static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1753                                   struct nfs41_bind_conn_to_session_args *args,
1754                                   struct compound_hdr *hdr)
1755{
1756        __be32 *p;
1757
1758        encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1759                decode_bind_conn_to_session_maxsz, hdr);
1760        encode_opaque_fixed(xdr, args->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1761        p = xdr_reserve_space(xdr, 8);
1762        *p++ = cpu_to_be32(args->dir);
1763        *p = (args->use_conn_in_rdma_mode) ? cpu_to_be32(1) : cpu_to_be32(0);
1764}
1765
1766static void encode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
1767{
1768        unsigned int i;
1769        encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
1770        for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
1771                encode_uint32(xdr, op_map->u.words[i]);
1772}
1773
1774static void encode_exchange_id(struct xdr_stream *xdr,
1775                               struct nfs41_exchange_id_args *args,
1776                               struct compound_hdr *hdr)
1777{
1778        __be32 *p;
1779        char impl_name[IMPL_NAME_LIMIT];
1780        int len = 0;
1781
1782        encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1783        encode_nfs4_verifier(xdr, &args->verifier);
1784
1785        encode_string(xdr, strlen(args->client->cl_owner_id),
1786                        args->client->cl_owner_id);
1787
1788        encode_uint32(xdr, args->flags);
1789        encode_uint32(xdr, args->state_protect.how);
1790
1791        switch (args->state_protect.how) {
1792        case SP4_NONE:
1793                break;
1794        case SP4_MACH_CRED:
1795                encode_op_map(xdr, &args->state_protect.enforce);
1796                encode_op_map(xdr, &args->state_protect.allow);
1797                break;
1798        default:
1799                WARN_ON_ONCE(1);
1800                break;
1801        }
1802
1803        if (send_implementation_id &&
1804            sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1805            sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1806                <= sizeof(impl_name) + 1)
1807                len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1808                               utsname()->sysname, utsname()->release,
1809                               utsname()->version, utsname()->machine);
1810
1811        if (len > 0) {
1812                encode_uint32(xdr, 1);  /* implementation id array length=1 */
1813
1814                encode_string(xdr,
1815                        sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1816                        CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1817                encode_string(xdr, len, impl_name);
1818                /* just send zeros for nii_date - the date is in nii_name */
1819                p = reserve_space(xdr, 12);
1820                p = xdr_encode_hyper(p, 0);
1821                *p = cpu_to_be32(0);
1822        } else
1823                encode_uint32(xdr, 0);  /* implementation id array length=0 */
1824}
1825
1826static void encode_create_session(struct xdr_stream *xdr,
1827                                  struct nfs41_create_session_args *args,
1828                                  struct compound_hdr *hdr)
1829{
1830        __be32 *p;
1831        struct nfs_client *clp = args->client;
1832        struct rpc_clnt *clnt = clp->cl_rpcclient;
1833        struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1834        u32 max_resp_sz_cached;
1835
1836        /*
1837         * Assumes OPEN is the biggest non-idempotent compound.
1838         * 2 is the verifier.
1839         */
1840        max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE + 2)
1841                                * XDR_UNIT + RPC_MAX_AUTH_SIZE;
1842
1843        encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1844        p = reserve_space(xdr, 16 + 2*28 + 20 + clnt->cl_nodelen + 12);
1845        p = xdr_encode_hyper(p, args->clientid);
1846        *p++ = cpu_to_be32(args->seqid);                        /*Sequence id */
1847        *p++ = cpu_to_be32(args->flags);                        /*flags */
1848
1849        /* Fore Channel */
1850        *p++ = cpu_to_be32(0);                          /* header padding size */
1851        *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1852        *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1853        *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1854        *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1855        *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1856        *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1857
1858        /* Back Channel */
1859        *p++ = cpu_to_be32(0);                          /* header padding size */
1860        *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1861        *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1862        *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1863        *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1864        *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1865        *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1866
1867        *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1868        *p++ = cpu_to_be32(1);
1869        *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1870
1871        /* authsys_parms rfc1831 */
1872        *p++ = cpu_to_be32(nn->boot_time.tv_nsec);      /* stamp */
1873        p = xdr_encode_array(p, clnt->cl_nodename, clnt->cl_nodelen);
1874        *p++ = cpu_to_be32(0);                          /* UID */
1875        *p++ = cpu_to_be32(0);                          /* GID */
1876        *p = cpu_to_be32(0);                            /* No more gids */
1877}
1878
1879static void encode_destroy_session(struct xdr_stream *xdr,
1880                                   struct nfs4_session *session,
1881                                   struct compound_hdr *hdr)
1882{
1883        encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1884        encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1885}
1886
1887static void encode_destroy_clientid(struct xdr_stream *xdr,
1888                                   uint64_t clientid,
1889                                   struct compound_hdr *hdr)
1890{
1891        encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1892        encode_uint64(xdr, clientid);
1893}
1894
1895static void encode_reclaim_complete(struct xdr_stream *xdr,
1896                                    struct nfs41_reclaim_complete_args *args,
1897                                    struct compound_hdr *hdr)
1898{
1899        encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1900        encode_uint32(xdr, args->one_fs);
1901}
1902#endif /* CONFIG_NFS_V4_1 */
1903
1904static void encode_sequence(struct xdr_stream *xdr,
1905                            const struct nfs4_sequence_args *args,
1906                            struct compound_hdr *hdr)
1907{
1908#if defined(CONFIG_NFS_V4_1)
1909        struct nfs4_session *session;
1910        struct nfs4_slot_table *tp;
1911        struct nfs4_slot *slot = args->sa_slot;
1912        __be32 *p;
1913
1914        tp = slot->table;
1915        session = tp->session;
1916        if (!session)
1917                return;
1918
1919        encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1920
1921        /*
1922         * Sessionid + seqid + slotid + max slotid + cache_this
1923         */
1924        dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1925                "max_slotid=%d cache_this=%d\n",
1926                __func__,
1927                ((u32 *)session->sess_id.data)[0],
1928                ((u32 *)session->sess_id.data)[1],
1929                ((u32 *)session->sess_id.data)[2],
1930                ((u32 *)session->sess_id.data)[3],
1931                slot->seq_nr, slot->slot_nr,
1932                tp->highest_used_slotid, args->sa_cache_this);
1933        p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1934        p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1935        *p++ = cpu_to_be32(slot->seq_nr);
1936        *p++ = cpu_to_be32(slot->slot_nr);
1937        *p++ = cpu_to_be32(tp->highest_used_slotid);
1938        *p = cpu_to_be32(args->sa_cache_this);
1939#endif /* CONFIG_NFS_V4_1 */
1940}
1941
1942#ifdef CONFIG_NFS_V4_1
1943static void
1944encode_getdeviceinfo(struct xdr_stream *xdr,
1945                     const struct nfs4_getdeviceinfo_args *args,
1946                     struct compound_hdr *hdr)
1947{
1948        __be32 *p;
1949
1950        encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1951        p = reserve_space(xdr, NFS4_DEVICEID4_SIZE + 4 + 4);
1952        p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1953                                    NFS4_DEVICEID4_SIZE);
1954        *p++ = cpu_to_be32(args->pdev->layout_type);
1955        *p++ = cpu_to_be32(args->pdev->maxcount);       /* gdia_maxcount */
1956
1957        p = reserve_space(xdr, 4 + 4);
1958        *p++ = cpu_to_be32(1);                  /* bitmap length */
1959        *p++ = cpu_to_be32(args->notify_types);
1960}
1961
1962static void
1963encode_layoutget(struct xdr_stream *xdr,
1964                      const struct nfs4_layoutget_args *args,
1965                      struct compound_hdr *hdr)
1966{
1967        __be32 *p;
1968
1969        encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1970        p = reserve_space(xdr, 36);
1971        *p++ = cpu_to_be32(0);     /* Signal layout available */
1972        *p++ = cpu_to_be32(args->type);
1973        *p++ = cpu_to_be32(args->range.iomode);
1974        p = xdr_encode_hyper(p, args->range.offset);
1975        p = xdr_encode_hyper(p, args->range.length);
1976        p = xdr_encode_hyper(p, args->minlength);
1977        encode_nfs4_stateid(xdr, &args->stateid);
1978        encode_uint32(xdr, args->maxcount);
1979
1980        dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1981                __func__,
1982                args->type,
1983                args->range.iomode,
1984                (unsigned long)args->range.offset,
1985                (unsigned long)args->range.length,
1986                args->maxcount);
1987}
1988
1989static int
1990encode_layoutcommit(struct xdr_stream *xdr,
1991                    struct inode *inode,
1992                    struct nfs4_layoutcommit_args *args,
1993                    struct compound_hdr *hdr)
1994{
1995        __be32 *p;
1996
1997        dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1998                NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1999
2000        encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);

2001        p = reserve_space(xdr, 20);
2002        /* Only whole file layouts */
2003        p = xdr_encode_hyper(p, 0); /* offset */
2004        p = xdr_encode_hyper(p, args->lastbytewritten + 1);     /* length */
2005        *p = cpu_to_be32(0); /* reclaim */
2006        encode_nfs4_stateid(xdr, &args->stateid);
2007        if (args->lastbytewritten != U64_MAX) {
2008                p = reserve_space(xdr, 20);
2009                *p++ = cpu_to_be32(1); /* newoffset = TRUE */
2010                p = xdr_encode_hyper(p, args->lastbytewritten);
2011        } else {
2012                p = reserve_space(xdr, 12);
2013                *p++ = cpu_to_be32(0); /* newoffset = FALSE */
2014        }
2015        *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
2016        *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
2017
2018        if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit) {
2019                NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
2020                        NFS_I(inode)->layout, xdr, args);
2021        } else {
2022                encode_uint32(xdr, args->layoutupdate_len);
2023                if (args->layoutupdate_pages) {
2024                        xdr_write_pages(xdr, args->layoutupdate_pages, 0,
2025                                        args->layoutupdate_len);
2026                }
2027        }
2028
2029        return 0;
2030}
2031
2032static void
2033encode_layoutreturn(struct xdr_stream *xdr,
2034                    const struct nfs4_layoutreturn_args *args,
2035                    struct compound_hdr *hdr)
2036{
2037        const struct pnfs_layoutdriver_type *lr_ops = NFS_SERVER(args->inode)->pnfs_curr_ld;
2038        __be32 *p;
2039
2040        encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2041        p = reserve_space(xdr, 16);
2042        *p++ = cpu_to_be32(0);          /* reclaim. always 0 for now */
2043        *p++ = cpu_to_be32(args->layout_type);
2044        *p++ = cpu_to_be32(args->range.iomode);
2045        *p = cpu_to_be32(RETURN_FILE);
2046        p = reserve_space(xdr, 16);
2047        p = xdr_encode_hyper(p, args->range.offset);
2048        p = xdr_encode_hyper(p, args->range.length);
2049        spin_lock(&args->inode->i_lock);
2050        encode_nfs4_stateid(xdr, &args->stateid);
2051        spin_unlock(&args->inode->i_lock);
2052        if (args->ld_private->ops && args->ld_private->ops->encode)
2053                args->ld_private->ops->encode(xdr, args, args->ld_private);
2054        else if (lr_ops->encode_layoutreturn)
2055                lr_ops->encode_layoutreturn(xdr, args);
2056        else
2057                encode_uint32(xdr, 0);
2058}
2059
2060static int
2061encode_secinfo_no_name(struct xdr_stream *xdr,
2062                       const struct nfs41_secinfo_no_name_args *args,
2063                       struct compound_hdr *hdr)
2064{
2065        encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2066        encode_uint32(xdr, args->style);
2067        return 0;
2068}
2069
2070static void encode_test_stateid(struct xdr_stream *xdr,
2071                                struct nfs41_test_stateid_args *args,
2072                                struct compound_hdr *hdr)
2073{
2074        encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2075        encode_uint32(xdr, 1);
2076        encode_nfs4_stateid(xdr, args->stateid);
2077}
2078
2079static void encode_free_stateid(struct xdr_stream *xdr,
2080                                struct nfs41_free_stateid_args *args,
2081                                struct compound_hdr *hdr)
2082{
2083        encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2084        encode_nfs4_stateid(xdr, &args->stateid);
2085}
2086#else
2087static inline void
2088encode_layoutreturn(struct xdr_stream *xdr,
2089                    const struct nfs4_layoutreturn_args *args,
2090                    struct compound_hdr *hdr)
2091{
2092}
2093#endif /* CONFIG_NFS_V4_1 */
2094
2095/*
2096 * END OF "GENERIC" ENCODE ROUTINES.
2097 */
2098
2099static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2100{
2101#if defined(CONFIG_NFS_V4_1)
2102        struct nfs4_session *session = args->sa_slot->table->session;
2103        if (session)
2104                return session->clp->cl_mvops->minor_version;
2105#endif /* CONFIG_NFS_V4_1 */
2106        return 0;
2107}
2108
2109/*
2110 * Encode an ACCESS request
2111 */
2112static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2113                                const struct nfs4_accessargs *args)
2114{
2115        struct compound_hdr hdr = {
2116                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2117        };
2118
2119        encode_compound_hdr(xdr, req, &hdr);
2120        encode_sequence(xdr, &args->seq_args, &hdr);
2121        encode_putfh(xdr, args->fh, &hdr);
2122        encode_access(xdr, args->access, &hdr);
2123        encode_getfattr(xdr, args->bitmask, &hdr);
2124        encode_nops(&hdr);
2125}
2126
2127/*
2128 * Encode LOOKUP request
2129 */
2130static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2131                                const struct nfs4_lookup_arg *args)
2132{
2133        struct compound_hdr hdr = {
2134                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2135        };
2136
2137        encode_compound_hdr(xdr, req, &hdr);
2138        encode_sequence(xdr, &args->seq_args, &hdr);
2139        encode_putfh(xdr, args->dir_fh, &hdr);
2140        encode_lookup(xdr, args->name, &hdr);
2141        encode_getfh(xdr, &hdr);
2142        encode_getfattr(xdr, args->bitmask, &hdr);
2143        encode_nops(&hdr);
2144}
2145
2146/*
2147 * Encode LOOKUP_ROOT request
2148 */
2149static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2150                                     struct xdr_stream *xdr,
2151                                     const struct nfs4_lookup_root_arg *args)
2152{
2153        struct compound_hdr hdr = {
2154                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2155        };
2156
2157        encode_compound_hdr(xdr, req, &hdr);
2158        encode_sequence(xdr, &args->seq_args, &hdr);
2159        encode_putrootfh(xdr, &hdr);
2160        encode_getfh(xdr, &hdr);
2161        encode_getfattr(xdr, args->bitmask, &hdr);
2162        encode_nops(&hdr);
2163}
2164
2165/*
2166 * Encode REMOVE request
2167 */
2168static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2169                                const struct nfs_removeargs *args)
2170{
2171        struct compound_hdr hdr = {
2172                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2173        };
2174
2175        encode_compound_hdr(xdr, req, &hdr);
2176        encode_sequence(xdr, &args->seq_args, &hdr);
2177        encode_putfh(xdr, args->fh, &hdr);
2178        encode_remove(xdr, &args->name, &hdr);
2179        encode_nops(&hdr);
2180}
2181
2182/*
2183 * Encode RENAME request
2184 */
2185static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2186                                const struct nfs_renameargs *args)
2187{
2188        struct compound_hdr hdr = {
2189                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2190        };
2191
2192        encode_compound_hdr(xdr, req, &hdr);
2193        encode_sequence(xdr, &args->seq_args, &hdr);
2194        encode_putfh(xdr, args->old_dir, &hdr);
2195        encode_savefh(xdr, &hdr);
2196        encode_putfh(xdr, args->new_dir, &hdr);
2197        encode_rename(xdr, args->old_name, args->new_name, &hdr);
2198        encode_nops(&hdr);
2199}
2200
2201/*
2202 * Encode LINK request
2203 */
2204static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2205                             const struct nfs4_link_arg *args)
2206{
2207        struct compound_hdr hdr = {
2208                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2209        };
2210
2211        encode_compound_hdr(xdr, req, &hdr);
2212        encode_sequence(xdr, &args->seq_args, &hdr);
2213        encode_putfh(xdr, args->fh, &hdr);
2214        encode_savefh(xdr, &hdr);
2215        encode_putfh(xdr, args->dir_fh, &hdr);
2216        encode_link(xdr, args->name, &hdr);
2217        encode_restorefh(xdr, &hdr);
2218        encode_getfattr(xdr, args->bitmask, &hdr);
2219        encode_nops(&hdr);
2220}
2221
2222/*
2223 * Encode CREATE request
2224 */
2225static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2226                                const struct nfs4_create_arg *args)
2227{
2228        struct compound_hdr hdr = {
2229                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2230        };
2231
2232        encode_compound_hdr(xdr, req, &hdr);
2233        encode_sequence(xdr, &args->seq_args, &hdr);
2234        encode_putfh(xdr, args->dir_fh, &hdr);
2235        encode_create(xdr, args, &hdr);
2236        encode_getfh(xdr, &hdr);
2237        encode_getfattr(xdr, args->bitmask, &hdr);
2238        encode_nops(&hdr);
2239}
2240
2241/*
2242 * Encode SYMLINK request
2243 */
2244static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2245                                 const struct nfs4_create_arg *args)
2246{
2247        nfs4_xdr_enc_create(req, xdr, args);
2248}
2249
2250/*
2251 * Encode GETATTR request
2252 */
2253static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2254                                 const struct nfs4_getattr_arg *args)
2255{
2256        struct compound_hdr hdr = {
2257                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2258        };
2259
2260        encode_compound_hdr(xdr, req, &hdr);
2261        encode_sequence(xdr, &args->seq_args, &hdr);
2262        encode_putfh(xdr, args->fh, &hdr);
2263        encode_getfattr(xdr, args->bitmask, &hdr);
2264        encode_nops(&hdr);
2265}
2266
2267/*
2268 * Encode a CLOSE request
2269 */
2270static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2271                               struct nfs_closeargs *args)
2272{
2273        struct compound_hdr hdr = {
2274                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2275        };
2276
2277        encode_compound_hdr(xdr, req, &hdr);
2278        encode_sequence(xdr, &args->seq_args, &hdr);
2279        encode_putfh(xdr, args->fh, &hdr);
2280        if (args->lr_args)
2281                encode_layoutreturn(xdr, args->lr_args, &hdr);
2282        encode_close(xdr, args, &hdr);
2283        if (args->bitmask != NULL)
2284                encode_getfattr(xdr, args->bitmask, &hdr);
2285        encode_nops(&hdr);
2286}
2287
2288/*
2289 * Encode an OPEN request
2290 */
2291static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2292                              struct nfs_openargs *args)
2293{
2294        struct compound_hdr hdr = {
2295                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2296        };
2297
2298        encode_compound_hdr(xdr, req, &hdr);
2299        encode_sequence(xdr, &args->seq_args, &hdr);
2300        encode_putfh(xdr, args->fh, &hdr);
2301        encode_open(xdr, args, &hdr);
2302        encode_getfh(xdr, &hdr);
2303        if (args->access)
2304                encode_access(xdr, args->access, &hdr);
2305        encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2306        encode_nops(&hdr);
2307}
2308
2309/*
2310 * Encode an OPEN_CONFIRM request
2311 */
2312static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2313                                      struct xdr_stream *xdr,
2314                                      struct nfs_open_confirmargs *args)
2315{
2316        struct compound_hdr hdr = {
2317                .nops   = 0,
2318        };
2319
2320        encode_compound_hdr(xdr, req, &hdr);
2321        encode_putfh(xdr, args->fh, &hdr);
2322        encode_open_confirm(xdr, args, &hdr);
2323        encode_nops(&hdr);
2324}
2325
2326/*
2327 * Encode an OPEN request with no attributes.
2328 */
2329static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2330                                     struct xdr_stream *xdr,
2331                                     struct nfs_openargs *args)
2332{
2333        struct compound_hdr hdr = {
2334                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2335        };
2336
2337        encode_compound_hdr(xdr, req, &hdr);
2338        encode_sequence(xdr, &args->seq_args, &hdr);
2339        encode_putfh(xdr, args->fh, &hdr);
2340        encode_open(xdr, args, &hdr);
2341        if (args->access)
2342                encode_access(xdr, args->access, &hdr);
2343        encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2344        encode_nops(&hdr);
2345}
2346
2347/*
2348 * Encode an OPEN_DOWNGRADE request
2349 */
2350static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2351                                        struct xdr_stream *xdr,
2352                                        struct nfs_closeargs *args)
2353{
2354        struct compound_hdr hdr = {
2355                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2356        };
2357
2358        encode_compound_hdr(xdr, req, &hdr);
2359        encode_sequence(xdr, &args->seq_args, &hdr);
2360        encode_putfh(xdr, args->fh, &hdr);
2361        if (args->lr_args)
2362                encode_layoutreturn(xdr, args->lr_args, &hdr);
2363        encode_open_downgrade(xdr, args, &hdr);
2364        encode_nops(&hdr);
2365}
2366
2367/*
2368 * Encode a LOCK request
2369 */
2370static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2371                              struct nfs_lock_args *args)
2372{
2373        struct compound_hdr hdr = {
2374                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2375        };
2376
2377        encode_compound_hdr(xdr, req, &hdr);
2378        encode_sequence(xdr, &args->seq_args, &hdr);
2379        encode_putfh(xdr, args->fh, &hdr);
2380        encode_lock(xdr, args, &hdr);
2381        encode_nops(&hdr);
2382}
2383
2384/*
2385 * Encode a LOCKT request
2386 */
2387static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2388                               struct nfs_lockt_args *args)
2389{
2390        struct compound_hdr hdr = {
2391                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2392        };
2393
2394        encode_compound_hdr(xdr, req, &hdr);
2395        encode_sequence(xdr, &args->seq_args, &hdr);
2396        encode_putfh(xdr, args->fh, &hdr);
2397        encode_lockt(xdr, args, &hdr);
2398        encode_nops(&hdr);
2399}
2400
2401/*
2402 * Encode a LOCKU request
2403 */
2404static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2405                               struct nfs_locku_args *args)
2406{
2407        struct compound_hdr hdr = {
2408                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2409        };
2410
2411        encode_compound_hdr(xdr, req, &hdr);
2412        encode_sequence(xdr, &args->seq_args, &hdr);
2413        encode_putfh(xdr, args->fh, &hdr);
2414        encode_locku(xdr, args, &hdr);
2415        encode_nops(&hdr);
2416}
2417
2418static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2419                                           struct xdr_stream *xdr,
2420                                        struct nfs_release_lockowner_args *args)
2421{
2422        struct compound_hdr hdr = {
2423                .minorversion = 0,
2424        };
2425
2426        encode_compound_hdr(xdr, req, &hdr);
2427        encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2428        encode_nops(&hdr);
2429}
2430
2431/*
2432 * Encode a READLINK request
2433 */
2434static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2435                                  const struct nfs4_readlink *args)
2436{
2437        struct compound_hdr hdr = {
2438                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2439        };
2440
2441        encode_compound_hdr(xdr, req, &hdr);
2442        encode_sequence(xdr, &args->seq_args, &hdr);
2443        encode_putfh(xdr, args->fh, &hdr);
2444        encode_readlink(xdr, args, req, &hdr);
2445
2446        xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2447                        args->pgbase, args->pglen);
2448        encode_nops(&hdr);
2449}
2450
2451/*
2452 * Encode a READDIR request
2453 */
2454static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2455                                 const struct nfs4_readdir_arg *args)
2456{
2457        struct compound_hdr hdr = {
2458                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2459        };
2460
2461        encode_compound_hdr(xdr, req, &hdr);
2462        encode_sequence(xdr, &args->seq_args, &hdr);
2463        encode_putfh(xdr, args->fh, &hdr);
2464        encode_readdir(xdr, args, req, &hdr);
2465
2466        xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2467                         args->pgbase, args->count);
2468        dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2469                        __func__, hdr.replen << 2, args->pages,
2470                        args->pgbase, args->count);
2471        encode_nops(&hdr);
2472}
2473
2474/*
2475 * Encode a READ request
2476 */
2477static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2478                              struct nfs_pgio_args *args)
2479{
2480        struct compound_hdr hdr = {
2481                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2482        };
2483
2484        encode_compound_hdr(xdr, req, &hdr);
2485        encode_sequence(xdr, &args->seq_args, &hdr);
2486        encode_putfh(xdr, args->fh, &hdr);
2487        encode_read(xdr, args, &hdr);
2488
2489        xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2490                         args->pages, args->pgbase, args->count);
2491        req->rq_rcv_buf.flags |= XDRBUF_READ;
2492        encode_nops(&hdr);
2493}
2494
2495/*
2496 * Encode an SETATTR request
2497 */
2498static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2499                                 struct nfs_setattrargs *args)
2500{
2501        struct compound_hdr hdr = {
2502                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2503        };
2504
2505        encode_compound_hdr(xdr, req, &hdr);
2506        encode_sequence(xdr, &args->seq_args, &hdr);
2507        encode_putfh(xdr, args->fh, &hdr);
2508        encode_setattr(xdr, args, args->server, &hdr);
2509        encode_getfattr(xdr, args->bitmask, &hdr);
2510        encode_nops(&hdr);
2511}
2512
2513/*
2514 * Encode a GETACL request
2515 */
2516static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2517                                struct nfs_getaclargs *args)
2518{
2519        struct compound_hdr hdr = {
2520                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2521        };
2522        uint32_t replen;
2523
2524        encode_compound_hdr(xdr, req, &hdr);
2525        encode_sequence(xdr, &args->seq_args, &hdr);
2526        encode_putfh(xdr, args->fh, &hdr);
2527        replen = hdr.replen + op_decode_hdr_maxsz;
2528        encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2529
2530        xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2531                args->acl_pages, 0, args->acl_len);
2532
2533        encode_nops(&hdr);
2534}
2535
2536/*
2537 * Encode a WRITE request
2538 */
2539static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2540                               struct nfs_pgio_args *args)
2541{
2542        struct compound_hdr hdr = {
2543                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2544        };
2545
2546        encode_compound_hdr(xdr, req, &hdr);
2547        encode_sequence(xdr, &args->seq_args, &hdr);
2548        encode_putfh(xdr, args->fh, &hdr);
2549        encode_write(xdr, args, &hdr);
2550        req->rq_snd_buf.flags |= XDRBUF_WRITE;
2551        if (args->bitmask)
2552                encode_getfattr(xdr, args->bitmask, &hdr);
2553        encode_nops(&hdr);
2554}
2555
2556/*
2557 *  a COMMIT request
2558 */
2559static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2560                                struct nfs_commitargs *args)
2561{
2562        struct compound_hdr hdr = {
2563                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2564        };
2565
2566        encode_compound_hdr(xdr, req, &hdr);
2567        encode_sequence(xdr, &args->seq_args, &hdr);
2568        encode_putfh(xdr, args->fh, &hdr);
2569        encode_commit(xdr, args, &hdr);
2570        encode_nops(&hdr);
2571}
2572
2573/*
2574 * FSINFO request
2575 */
2576static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2577                                struct nfs4_fsinfo_arg *args)
2578{
2579        struct compound_hdr hdr = {
2580                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2581        };
2582
2583        encode_compound_hdr(xdr, req, &hdr);
2584        encode_sequence(xdr, &args->seq_args, &hdr);
2585        encode_putfh(xdr, args->fh, &hdr);
2586        encode_fsinfo(xdr, args->bitmask, &hdr);
2587        encode_nops(&hdr);
2588}
2589
2590/*
2591 * a PATHCONF request
2592 */
2593static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2594                                  const struct nfs4_pathconf_arg *args)
2595{
2596        struct compound_hdr hdr = {
2597                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2598        };
2599
2600        encode_compound_hdr(xdr, req, &hdr);
2601        encode_sequence(xdr, &args->seq_args, &hdr);
2602        encode_putfh(xdr, args->fh, &hdr);
2603        encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2604                           &hdr);
2605        encode_nops(&hdr);
2606}
2607
2608/*
2609 * a STATFS request
2610 */
2611static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2612                                const struct nfs4_statfs_arg *args)
2613{
2614        struct compound_hdr hdr = {
2615                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2616        };
2617
2618        encode_compound_hdr(xdr, req, &hdr);
2619        encode_sequence(xdr, &args->seq_args, &hdr);
2620        encode_putfh(xdr, args->fh, &hdr);
2621        encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2622                           args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2623        encode_nops(&hdr);
2624}
2625
2626/*
2627 * GETATTR_BITMAP request
2628 */
2629static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2630                                     struct xdr_stream *xdr,
2631                                     struct nfs4_server_caps_arg *args)
2632{
2633        const u32 *bitmask = args->bitmask;
2634        struct compound_hdr hdr = {
2635                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2636        };
2637
2638        encode_compound_hdr(xdr, req, &hdr);
2639        encode_sequence(xdr, &args->seq_args, &hdr);
2640        encode_putfh(xdr, args->fhandle, &hdr);
2641        encode_getattr_three(xdr, bitmask[0], bitmask[1], bitmask[2], &hdr);
2642        encode_nops(&hdr);
2643}
2644
2645/*
2646 * a RENEW request
2647 */
2648static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2649                               struct nfs_client *clp)
2650{
2651        struct compound_hdr hdr = {
2652                .nops   = 0,
2653        };
2654
2655        encode_compound_hdr(xdr, req, &hdr);
2656        encode_renew(xdr, clp->cl_clientid, &hdr);
2657        encode_nops(&hdr);
2658}
2659
2660/*
2661 * a SETCLIENTID request
2662 */
2663static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2664                                     struct xdr_stream *xdr,
2665                                     struct nfs4_setclientid *sc)
2666{
2667        struct compound_hdr hdr = {
2668                .nops   = 0,
2669        };
2670
2671        encode_compound_hdr(xdr, req, &hdr);
2672        encode_setclientid(xdr, sc, &hdr);
2673        encode_nops(&hdr);
2674}
2675
2676/*
2677 * a SETCLIENTID_CONFIRM request
2678 */
2679static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2680                                             struct xdr_stream *xdr,
2681                                             struct nfs4_setclientid_res *arg)
2682{
2683        struct compound_hdr hdr = {
2684                .nops   = 0,
2685        };
2686
2687        encode_compound_hdr(xdr, req, &hdr);
2688        encode_setclientid_confirm(xdr, arg, &hdr);
2689        encode_nops(&hdr);
2690}
2691
2692/*
2693 * DELEGRETURN request
2694 */
2695static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2696                                     struct xdr_stream *xdr,
2697                                     const struct nfs4_delegreturnargs *args)
2698{
2699        struct compound_hdr hdr = {
2700                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2701        };
2702
2703        encode_compound_hdr(xdr, req, &hdr);
2704        encode_sequence(xdr, &args->seq_args, &hdr);
2705        encode_putfh(xdr, args->fhandle, &hdr);
2706        if (args->lr_args)
2707                encode_layoutreturn(xdr, args->lr_args, &hdr);
2708        encode_getfattr(xdr, args->bitmask, &hdr);
2709        encode_delegreturn(xdr, args->stateid, &hdr);
2710        encode_nops(&hdr);
2711}
2712
2713/*
2714 * Encode FS_LOCATIONS request
2715 */
2716static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2717                                      struct xdr_stream *xdr,
2718                                      struct nfs4_fs_locations_arg *args)
2719{
2720        struct compound_hdr hdr = {
2721                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2722        };
2723        uint32_t replen;
2724
2725        encode_compound_hdr(xdr, req, &hdr);
2726        encode_sequence(xdr, &args->seq_args, &hdr);
2727        if (args->migration) {
2728                encode_putfh(xdr, args->fh, &hdr);
2729                replen = hdr.replen;
2730                encode_fs_locations(xdr, args->bitmask, &hdr);
2731                if (args->renew)
2732                        encode_renew(xdr, args->clientid, &hdr);
2733        } else {
2734                encode_putfh(xdr, args->dir_fh, &hdr);
2735                encode_lookup(xdr, args->name, &hdr);
2736                replen = hdr.replen;
2737                encode_fs_locations(xdr, args->bitmask, &hdr);
2738        }
2739
2740        /* Set up reply kvec to capture returned fs_locations array. */
2741        xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2742                        0, PAGE_SIZE);
2743        encode_nops(&hdr);
2744}
2745
2746/*
2747 * Encode SECINFO request
2748 */
2749static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2750                                struct xdr_stream *xdr,
2751                                struct nfs4_secinfo_arg *args)
2752{
2753        struct compound_hdr hdr = {
2754                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2755        };
2756
2757        encode_compound_hdr(xdr, req, &hdr);
2758        encode_sequence(xdr, &args->seq_args, &hdr);
2759        encode_putfh(xdr, args->dir_fh, &hdr);
2760        encode_secinfo(xdr, args->name, &hdr);
2761        encode_nops(&hdr);
2762}
2763
2764/*
2765 * Encode FSID_PRESENT request
2766 */
2767static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2768                                      struct xdr_stream *xdr,
2769                                      struct nfs4_fsid_present_arg *args)
2770{
2771        struct compound_hdr hdr = {
2772                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2773        };
2774
2775        encode_compound_hdr(xdr, req, &hdr);
2776        encode_sequence(xdr, &args->seq_args, &hdr);
2777        encode_putfh(xdr, args->fh, &hdr);
2778        encode_getfh(xdr, &hdr);
2779        if (args->renew)
2780                encode_renew(xdr, args->clientid, &hdr);
2781        encode_nops(&hdr);
2782}
2783
2784#if defined(CONFIG_NFS_V4_1)
2785/*
2786 * BIND_CONN_TO_SESSION request
2787 */
2788static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2789                                struct xdr_stream *xdr,
2790                                struct nfs41_bind_conn_to_session_args *args)
2791{
2792        struct compound_hdr hdr = {
2793                .minorversion = args->client->cl_mvops->minor_version,
2794        };
2795
2796        encode_compound_hdr(xdr, req, &hdr);
2797        encode_bind_conn_to_session(xdr, args, &hdr);
2798        encode_nops(&hdr);
2799}
2800
2801/*
2802 * EXCHANGE_ID request
2803 */
2804static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2805                                     struct xdr_stream *xdr,
2806                                     struct nfs41_exchange_id_args *args)
2807{
2808        struct compound_hdr hdr = {
2809                .minorversion = args->client->cl_mvops->minor_version,
2810        };
2811
2812        encode_compound_hdr(xdr, req, &hdr);
2813        encode_exchange_id(xdr, args, &hdr);
2814        encode_nops(&hdr);
2815}
2816
2817/*
2818 * a CREATE_SESSION request
2819 */
2820static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2821                                        struct xdr_stream *xdr,
2822                                        struct nfs41_create_session_args *args)
2823{
2824        struct compound_hdr hdr = {
2825                .minorversion = args->client->cl_mvops->minor_version,
2826        };
2827
2828        encode_compound_hdr(xdr, req, &hdr);
2829        encode_create_session(xdr, args, &hdr);
2830        encode_nops(&hdr);
2831}
2832
2833/*
2834 * a DESTROY_SESSION request
2835 */
2836static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2837                                         struct xdr_stream *xdr,
2838                                         struct nfs4_session *session)
2839{
2840        struct compound_hdr hdr = {
2841                .minorversion = session->clp->cl_mvops->minor_version,
2842        };
2843
2844        encode_compound_hdr(xdr, req, &hdr);
2845        encode_destroy_session(xdr, session, &hdr);
2846        encode_nops(&hdr);
2847}
2848
2849/*
2850 * a DESTROY_CLIENTID request
2851 */
2852static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2853                                         struct xdr_stream *xdr,
2854                                         struct nfs_client *clp)
2855{
2856        struct compound_hdr hdr = {
2857                .minorversion = clp->cl_mvops->minor_version,
2858        };
2859
2860        encode_compound_hdr(xdr, req, &hdr);
2861        encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2862        encode_nops(&hdr);
2863}
2864
2865/*
2866 * a SEQUENCE request
2867 */
2868static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2869                                  struct nfs4_sequence_args *args)
2870{
2871        struct compound_hdr hdr = {
2872                .minorversion = nfs4_xdr_minorversion(args),
2873        };
2874
2875        encode_compound_hdr(xdr, req, &hdr);
2876        encode_sequence(xdr, args, &hdr);
2877        encode_nops(&hdr);
2878}
2879
2880/*
2881 * a GET_LEASE_TIME request
2882 */
2883static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2884                                        struct xdr_stream *xdr,
2885                                        struct nfs4_get_lease_time_args *args)
2886{
2887        struct compound_hdr hdr = {
2888                .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2889        };
2890        const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2891
2892        encode_compound_hdr(xdr, req, &hdr);
2893        encode_sequence(xdr, &args->la_seq_args, &hdr);
2894        encode_putrootfh(xdr, &hdr);
2895        encode_fsinfo(xdr, lease_bitmap, &hdr);
2896        encode_nops(&hdr);
2897}
2898
2899/*
2900 * a RECLAIM_COMPLETE request
2901 */
2902static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2903                                          struct xdr_stream *xdr,
2904                                struct nfs41_reclaim_complete_args *args)
2905{
2906        struct compound_hdr hdr = {
2907                .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2908        };
2909
2910        encode_compound_hdr(xdr, req, &hdr);
2911        encode_sequence(xdr, &args->seq_args, &hdr);
2912        encode_reclaim_complete(xdr, args, &hdr);
2913        encode_nops(&hdr);
2914}
2915
2916/*
2917 * Encode GETDEVICEINFO request
2918 */
2919static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2920                                       struct xdr_stream *xdr,
2921                                       struct nfs4_getdeviceinfo_args *args)
2922{
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_getdeviceinfo(xdr, args, &hdr);
2930
2931        /* set up reply kvec. Subtract notification bitmap max size (2)
2932         * so that notification bitmap is put in xdr_buf tail */
2933        xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2934                         args->pdev->pages, args->pdev->pgbase,
2935                         args->pdev->pglen);
2936
2937        encode_nops(&hdr);
2938}
2939
2940/*
2941 *  Encode LAYOUTGET request
2942 */
2943static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2944                                   struct xdr_stream *xdr,
2945                                   struct nfs4_layoutget_args *args)
2946{
2947        struct compound_hdr hdr = {
2948                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2949        };
2950
2951        encode_compound_hdr(xdr, req, &hdr);
2952        encode_sequence(xdr, &args->seq_args, &hdr);
2953        encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2954        encode_layoutget(xdr, args, &hdr);
2955
2956        xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2957            args->layout.pages, 0, args->layout.pglen);
2958
2959        encode_nops(&hdr);
2960}
2961
2962/*
2963 *  Encode LAYOUTCOMMIT request
2964 */
2965static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2966                                      struct xdr_stream *xdr,
2967                                      struct nfs4_layoutcommit_args *args)
2968{
2969        struct nfs4_layoutcommit_data *data =
2970                container_of(args, struct nfs4_layoutcommit_data, args);
2971        struct compound_hdr hdr = {
2972                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2973        };
2974
2975        encode_compound_hdr(xdr, req, &hdr);
2976        encode_sequence(xdr, &args->seq_args, &hdr);
2977        encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2978        encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2979        encode_getfattr(xdr, args->bitmask, &hdr);
2980        encode_nops(&hdr);
2981}
2982
2983/*
2984 * Encode LAYOUTRETURN request
2985 */
2986static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2987                                      struct xdr_stream *xdr,
2988                                      struct nfs4_layoutreturn_args *args)
2989{
2990        struct compound_hdr hdr = {
2991                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2992        };
2993
2994        encode_compound_hdr(xdr, req, &hdr);
2995        encode_sequence(xdr, &args->seq_args, &hdr);
2996        encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2997        encode_layoutreturn(xdr, args, &hdr);
2998        encode_nops(&hdr);
2999}
3000

3001/*
3002 * Encode SECINFO_NO_NAME request
3003 */
3004static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
3005                                        struct xdr_stream *xdr,
3006                                        struct nfs41_secinfo_no_name_args *args)
3007{
3008        struct compound_hdr hdr = {
3009                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3010        };
3011
3012        encode_compound_hdr(xdr, req, &hdr);
3013        encode_sequence(xdr, &args->seq_args, &hdr);
3014        encode_putrootfh(xdr, &hdr);
3015        encode_secinfo_no_name(xdr, args, &hdr);
3016        encode_nops(&hdr);
3017        return 0;
3018}
3019
3020/*
3021 *  Encode TEST_STATEID request
3022 */
3023static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
3024                                      struct xdr_stream *xdr,
3025                                      struct nfs41_test_stateid_args *args)
3026{
3027        struct compound_hdr hdr = {
3028                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3029        };
3030
3031        encode_compound_hdr(xdr, req, &hdr);
3032        encode_sequence(xdr, &args->seq_args, &hdr);
3033        encode_test_stateid(xdr, args, &hdr);
3034        encode_nops(&hdr);
3035}
3036
3037/*
3038 *  Encode FREE_STATEID request
3039 */
3040static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
3041                                     struct xdr_stream *xdr,
3042                                     struct nfs41_free_stateid_args *args)
3043{
3044        struct compound_hdr hdr = {
3045                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3046        };
3047
3048        encode_compound_hdr(xdr, req, &hdr);
3049        encode_sequence(xdr, &args->seq_args, &hdr);
3050        encode_free_stateid(xdr, args, &hdr);
3051        encode_nops(&hdr);
3052}
3053#endif /* CONFIG_NFS_V4_1 */
3054
3055static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
3056{
3057        dprintk("nfs: %s: prematurely hit end of receive buffer. "
3058                "Remaining buffer length is %tu words.\n",
3059                func, xdr->end - xdr->p);
3060}
3061
3062static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3063{
3064        __be32 *p;
3065
3066        p = xdr_inline_decode(xdr, 4);
3067        if (unlikely(!p))
3068                goto out_overflow;
3069        *len = be32_to_cpup(p);
3070        p = xdr_inline_decode(xdr, *len);
3071        if (unlikely(!p))
3072                goto out_overflow;
3073        *string = (char *)p;
3074        return 0;
3075out_overflow:
3076        print_overflow_msg(__func__, xdr);
3077        return -EIO;
3078}
3079
3080static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3081{
3082        __be32 *p;
3083
3084        p = xdr_inline_decode(xdr, 8);
3085        if (unlikely(!p))
3086                goto out_overflow;
3087        hdr->status = be32_to_cpup(p++);
3088        hdr->taglen = be32_to_cpup(p);
3089
3090        p = xdr_inline_decode(xdr, hdr->taglen + 4);
3091        if (unlikely(!p))
3092                goto out_overflow;
3093        hdr->tag = (char *)p;
3094        p += XDR_QUADLEN(hdr->taglen);
3095        hdr->nops = be32_to_cpup(p);
3096        if (unlikely(hdr->nops < 1))
3097                return nfs4_stat_to_errno(hdr->status);
3098        return 0;
3099out_overflow:
3100        print_overflow_msg(__func__, xdr);
3101        return -EIO;
3102}
3103
3104static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3105                int *nfs_retval)
3106{
3107        __be32 *p;
3108        uint32_t opnum;
3109        int32_t nfserr;
3110
3111        p = xdr_inline_decode(xdr, 8);
3112        if (unlikely(!p))
3113                goto out_overflow;
3114        opnum = be32_to_cpup(p++);
3115        if (unlikely(opnum != expected))
3116                goto out_bad_operation;
3117        nfserr = be32_to_cpup(p);
3118        if (nfserr == NFS_OK)
3119                *nfs_retval = 0;
3120        else
3121                *nfs_retval = nfs4_stat_to_errno(nfserr);
3122        return true;
3123out_bad_operation:
3124        dprintk("nfs: Server returned operation"
3125                " %d but we issued a request for %d\n",
3126                        opnum, expected);
3127        *nfs_retval = -EREMOTEIO;
3128        return false;
3129out_overflow:
3130        print_overflow_msg(__func__, xdr);
3131        *nfs_retval = -EIO;
3132        return false;
3133}
3134
3135static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3136{
3137        int retval;
3138
3139        __decode_op_hdr(xdr, expected, &retval);
3140        return retval;
3141}
3142
3143/* Dummy routine */
3144static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
3145{
3146        __be32 *p;
3147        unsigned int strlen;
3148        char *str;
3149
3150        p = xdr_inline_decode(xdr, 12);
3151        if (likely(p))
3152                return decode_opaque_inline(xdr, &strlen, &str);
3153        print_overflow_msg(__func__, xdr);
3154        return -EIO;
3155}
3156
3157static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3158{
3159        uint32_t bmlen;
3160        __be32 *p;
3161
3162        p = xdr_inline_decode(xdr, 4);
3163        if (unlikely(!p))
3164                goto out_overflow;
3165        bmlen = be32_to_cpup(p);
3166
3167        bitmap[0] = bitmap[1] = bitmap[2] = 0;
3168        p = xdr_inline_decode(xdr, (bmlen << 2));
3169        if (unlikely(!p))
3170                goto out_overflow;
3171        if (bmlen > 0) {
3172                bitmap[0] = be32_to_cpup(p++);
3173                if (bmlen > 1) {
3174                        bitmap[1] = be32_to_cpup(p++);
3175                        if (bmlen > 2)
3176                                bitmap[2] = be32_to_cpup(p);
3177                }
3178        }
3179        return 0;
3180out_overflow:
3181        print_overflow_msg(__func__, xdr);
3182        return -EIO;
3183}
3184
3185static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3186{
3187        __be32 *p;
3188
3189        p = xdr_inline_decode(xdr, 4);
3190        if (unlikely(!p))
3191                goto out_overflow;
3192        *attrlen = be32_to_cpup(p);
3193        *savep = xdr_stream_pos(xdr);
3194        return 0;
3195out_overflow:
3196        print_overflow_msg(__func__, xdr);
3197        return -EIO;
3198}
3199
3200static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3201{
3202        if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3203                int ret;
3204                ret = decode_attr_bitmap(xdr, bitmask);
3205                if (unlikely(ret < 0))
3206                        return ret;
3207                bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3208        } else
3209                bitmask[0] = bitmask[1] = bitmask[2] = 0;
3210        dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3211                bitmask[0], bitmask[1], bitmask[2]);
3212        return 0;
3213}
3214
3215static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3216{
3217        __be32 *p;
3218        int ret = 0;
3219
3220        *type = 0;
3221        if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3222                return -EIO;
3223        if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3224                p = xdr_inline_decode(xdr, 4);
3225                if (unlikely(!p))
3226                        goto out_overflow;
3227                *type = be32_to_cpup(p);
3228                if (*type < NF4REG || *type > NF4NAMEDATTR) {
3229                        dprintk("%s: bad type %d\n", __func__, *type);
3230                        return -EIO;
3231                }
3232                bitmap[0] &= ~FATTR4_WORD0_TYPE;
3233                ret = NFS_ATTR_FATTR_TYPE;
3234        }
3235        dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3236        return ret;
3237out_overflow:
3238        print_overflow_msg(__func__, xdr);
3239        return -EIO;
3240}
3241
3242static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3243                                      uint32_t *bitmap, uint32_t *type)
3244{
3245        __be32 *p;
3246
3247        *type = 0;
3248        if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3249                return -EIO;
3250        if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3251                p = xdr_inline_decode(xdr, 4);
3252                if (unlikely(!p))
3253                        goto out_overflow;
3254                *type = be32_to_cpup(p);
3255                bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3256        }
3257        dprintk("%s: expire type=0x%x\n", __func__, *type);
3258        return 0;
3259out_overflow:
3260        print_overflow_msg(__func__, xdr);
3261        return -EIO;
3262}
3263
3264static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3265{
3266        __be32 *p;
3267        int ret = 0;
3268
3269        *change = 0;
3270        if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3271                return -EIO;
3272        if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3273                p = xdr_inline_decode(xdr, 8);
3274                if (unlikely(!p))
3275                        goto out_overflow;
3276                xdr_decode_hyper(p, change);
3277                bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3278                ret = NFS_ATTR_FATTR_CHANGE;
3279        }
3280        dprintk("%s: change attribute=%Lu\n", __func__,
3281                        (unsigned long long)*change);
3282        return ret;
3283out_overflow:
3284        print_overflow_msg(__func__, xdr);
3285        return -EIO;
3286}
3287
3288static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3289{
3290        __be32 *p;
3291        int ret = 0;
3292
3293        *size = 0;
3294        if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3295                return -EIO;
3296        if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3297                p = xdr_inline_decode(xdr, 8);
3298                if (unlikely(!p))
3299                        goto out_overflow;
3300                xdr_decode_hyper(p, size);
3301                bitmap[0] &= ~FATTR4_WORD0_SIZE;
3302                ret = NFS_ATTR_FATTR_SIZE;
3303        }
3304        dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3305        return ret;
3306out_overflow:
3307        print_overflow_msg(__func__, xdr);
3308        return -EIO;
3309}
3310
3311static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3312{
3313        __be32 *p;
3314
3315        *res = 0;
3316        if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3317                return -EIO;
3318        if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3319                p = xdr_inline_decode(xdr, 4);
3320                if (unlikely(!p))
3321                        goto out_overflow;
3322                *res = be32_to_cpup(p);
3323                bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3324        }
3325        dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3326        return 0;
3327out_overflow:
3328        print_overflow_msg(__func__, xdr);
3329        return -EIO;
3330}
3331
3332static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3333{
3334        __be32 *p;
3335
3336        *res = 0;
3337        if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3338                return -EIO;
3339        if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3340                p = xdr_inline_decode(xdr, 4);
3341                if (unlikely(!p))
3342                        goto out_overflow;
3343                *res = be32_to_cpup(p);
3344                bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3345        }
3346        dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3347        return 0;
3348out_overflow:
3349        print_overflow_msg(__func__, xdr);
3350        return -EIO;
3351}
3352
3353static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3354{
3355        __be32 *p;
3356        int ret = 0;
3357
3358        fsid->major = 0;
3359        fsid->minor = 0;
3360        if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3361                return -EIO;
3362        if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3363                p = xdr_inline_decode(xdr, 16);
3364                if (unlikely(!p))
3365                        goto out_overflow;
3366                p = xdr_decode_hyper(p, &fsid->major);
3367                xdr_decode_hyper(p, &fsid->minor);
3368                bitmap[0] &= ~FATTR4_WORD0_FSID;
3369                ret = NFS_ATTR_FATTR_FSID;
3370        }
3371        dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3372                        (unsigned long long)fsid->major,
3373                        (unsigned long long)fsid->minor);
3374        return ret;
3375out_overflow:
3376        print_overflow_msg(__func__, xdr);
3377        return -EIO;
3378}
3379
3380static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3381{
3382        __be32 *p;
3383
3384        *res = 60;
3385        if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3386                return -EIO;
3387        if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3388                p = xdr_inline_decode(xdr, 4);
3389                if (unlikely(!p))
3390                        goto out_overflow;
3391                *res = be32_to_cpup(p);
3392                bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3393        }
3394        dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3395        return 0;
3396out_overflow:
3397        print_overflow_msg(__func__, xdr);
3398        return -EIO;
3399}
3400
3401static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3402{
3403        __be32 *p;
3404
3405        if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3406                return -EIO;
3407        if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3408                p = xdr_inline_decode(xdr, 4);
3409                if (unlikely(!p))
3410                        goto out_overflow;
3411                bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3412                *res = -be32_to_cpup(p);
3413        }
3414        return 0;
3415out_overflow:
3416        print_overflow_msg(__func__, xdr);
3417        return -EIO;
3418}
3419
3420static int decode_attr_exclcreat_supported(struct xdr_stream *xdr,
3421                                 uint32_t *bitmap, uint32_t *bitmask)
3422{
3423        if (likely(bitmap[2] & FATTR4_WORD2_SUPPATTR_EXCLCREAT)) {
3424                int ret;
3425                ret = decode_attr_bitmap(xdr, bitmask);
3426                if (unlikely(ret < 0))
3427                        return ret;
3428                bitmap[2] &= ~FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3429        } else
3430                bitmask[0] = bitmask[1] = bitmask[2] = 0;
3431        dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3432                bitmask[0], bitmask[1], bitmask[2]);
3433        return 0;
3434}
3435
3436static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3437{
3438        __be32 *p;
3439        int len;
3440
3441        if (fh != NULL)
3442                memset(fh, 0, sizeof(*fh));
3443
3444        if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3445                return -EIO;
3446        if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3447                p = xdr_inline_decode(xdr, 4);
3448                if (unlikely(!p))
3449                        goto out_overflow;
3450                len = be32_to_cpup(p);
3451                if (len > NFS4_FHSIZE)
3452                        return -EIO;
3453                p = xdr_inline_decode(xdr, len);
3454                if (unlikely(!p))
3455                        goto out_overflow;
3456                if (fh != NULL) {
3457                        memcpy(fh->data, p, len);
3458                        fh->size = len;
3459                }
3460                bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3461        }
3462        return 0;
3463out_overflow:
3464        print_overflow_msg(__func__, xdr);
3465        return -EIO;
3466}
3467
3468static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3469{
3470        __be32 *p;
3471
3472        *res = 0;
3473        if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3474                return -EIO;
3475        if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3476                p = xdr_inline_decode(xdr, 4);
3477                if (unlikely(!p))
3478                        goto out_overflow;
3479                *res = be32_to_cpup(p);
3480                bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3481        }
3482        dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3483        return 0;
3484out_overflow:
3485        print_overflow_msg(__func__, xdr);
3486        return -EIO;
3487}
3488
3489static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3490{
3491        __be32 *p;
3492        int ret = 0;
3493
3494        *fileid = 0;
3495        if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3496                return -EIO;
3497        if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3498                p = xdr_inline_decode(xdr, 8);
3499                if (unlikely(!p))
3500                        goto out_overflow;
3501                xdr_decode_hyper(p, fileid);
3502                bitmap[0] &= ~FATTR4_WORD0_FILEID;
3503                ret = NFS_ATTR_FATTR_FILEID;
3504        }
3505        dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3506        return ret;
3507out_overflow:
3508        print_overflow_msg(__func__, xdr);
3509        return -EIO;
3510}
3511
3512static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3513{
3514        __be32 *p;
3515        int ret = 0;
3516
3517        *fileid = 0;
3518        if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3519                return -EIO;
3520        if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3521                p = xdr_inline_decode(xdr, 8);
3522                if (unlikely(!p))
3523                        goto out_overflow;
3524                xdr_decode_hyper(p, fileid);
3525                bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3526                ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3527        }
3528        dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3529        return ret;
3530out_overflow:
3531        print_overflow_msg(__func__, xdr);
3532        return -EIO;
3533}
3534
3535static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3536{
3537        __be32 *p;
3538        int status = 0;
3539
3540        *res = 0;
3541        if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3542                return -EIO;
3543        if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3544                p = xdr_inline_decode(xdr, 8);
3545                if (unlikely(!p))
3546                        goto out_overflow;
3547                xdr_decode_hyper(p, res);
3548                bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3549        }
3550        dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3551        return status;
3552out_overflow:
3553        print_overflow_msg(__func__, xdr);
3554        return -EIO;
3555}
3556
3557static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3558{
3559        __be32 *p;
3560        int status = 0;
3561
3562        *res = 0;
3563        if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3564                return -EIO;
3565        if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3566                p = xdr_inline_decode(xdr, 8);
3567                if (unlikely(!p))
3568                        goto out_overflow;
3569                xdr_decode_hyper(p, res);
3570                bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3571        }
3572        dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3573        return status;
3574out_overflow:
3575        print_overflow_msg(__func__, xdr);
3576        return -EIO;
3577}
3578
3579static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3580{
3581        __be32 *p;
3582        int status = 0;
3583
3584        *res = 0;
3585        if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3586                return -EIO;
3587        if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3588                p = xdr_inline_decode(xdr, 8);
3589                if (unlikely(!p))
3590                        goto out_overflow;
3591                xdr_decode_hyper(p, res);
3592                bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3593        }
3594        dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3595        return status;
3596out_overflow:
3597        print_overflow_msg(__func__, xdr);
3598        return -EIO;
3599}
3600
3601static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3602{
3603        u32 n;
3604        __be32 *p;
3605        int status = 0;
3606
3607        p = xdr_inline_decode(xdr, 4);
3608        if (unlikely(!p))
3609                goto out_overflow;
3610        n = be32_to_cpup(p);
3611        if (n == 0)
3612                goto root_path;
3613        dprintk("pathname4: ");
3614        if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3615                dprintk("cannot parse %d components in path\n", n);
3616                goto out_eio;
3617        }
3618        for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3619                struct nfs4_string *component = &path->components[path->ncomponents];
3620                status = decode_opaque_inline(xdr, &component->len, &component->data);
3621                if (unlikely(status != 0))
3622                        goto out_eio;
3623                ifdebug (XDR)
3624                        pr_cont("%s%.*s ",
3625                                (path->ncomponents != n ? "/ " : ""),
3626                                component->len, component->data);
3627        }
3628out:
3629        return status;
3630root_path:
3631/* a root pathname is sent as a zero component4 */
3632        path->ncomponents = 1;
3633        path->components[0].len=0;
3634        path->components[0].data=NULL;
3635        dprintk("pathname4: /\n");
3636        goto out;
3637out_eio:
3638        dprintk(" status %d", status);
3639        status = -EIO;
3640        goto out;
3641out_overflow:
3642        print_overflow_msg(__func__, xdr);
3643        return -EIO;
3644}
3645
3646static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3647{
3648        int n;
3649        __be32 *p;
3650        int status = -EIO;
3651
3652        if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3653                goto out;
3654        status = 0;
3655        if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3656                goto out;
3657        bitmap[0] &= ~FATTR4_WORD0_FS_LOCATIONS;
3658        status = -EIO;
3659        /* Ignore borken servers that return unrequested attrs */
3660        if (unlikely(res == NULL))
3661                goto out;
3662        dprintk("%s: fsroot:\n", __func__);
3663        status = decode_pathname(xdr, &res->fs_path);
3664        if (unlikely(status != 0))
3665                goto out;
3666        p = xdr_inline_decode(xdr, 4);
3667        if (unlikely(!p))
3668                goto out_overflow;
3669        n = be32_to_cpup(p);
3670        if (n <= 0)
3671                goto out_eio;
3672        for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3673                u32 m;
3674                struct nfs4_fs_location *loc;
3675
3676                if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3677                        break;
3678                loc = &res->locations[res->nlocations];
3679                p = xdr_inline_decode(xdr, 4);
3680                if (unlikely(!p))
3681                        goto out_overflow;
3682                m = be32_to_cpup(p);
3683
3684                dprintk("%s: servers:\n", __func__);
3685                for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3686                        struct nfs4_string *server;
3687
3688                        if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3689                                unsigned int i;
3690                                dprintk("%s: using first %u of %u servers "
3691                                        "returned for location %u\n",
3692                                                __func__,
3693                                                NFS4_FS_LOCATION_MAXSERVERS,
3694                                                m, res->nlocations);
3695                                for (i = loc->nservers; i < m; i++) {
3696                                        unsigned int len;
3697                                        char *data;
3698                                        status = decode_opaque_inline(xdr, &len, &data);
3699                                        if (unlikely(status != 0))
3700                                                goto out_eio;
3701                                }
3702                                break;
3703                        }
3704                        server = &loc->servers[loc->nservers];
3705                        status = decode_opaque_inline(xdr, &server->len, &server->data);
3706                        if (unlikely(status != 0))
3707                                goto out_eio;
3708                        dprintk("%s ", server->data);
3709                }
3710                status = decode_pathname(xdr, &loc->rootpath);
3711                if (unlikely(status != 0))
3712                        goto out_eio;
3713        }
3714        if (res->nlocations != 0)
3715                status = NFS_ATTR_FATTR_V4_LOCATIONS;
3716out:
3717        dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3718        return status;
3719out_overflow:
3720        print_overflow_msg(__func__, xdr);
3721out_eio:
3722        status = -EIO;
3723        goto out;
3724}
3725
3726static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3727{
3728        __be32 *p;
3729        int status = 0;
3730
3731        *res = 0;
3732        if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3733                return -EIO;
3734        if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3735                p = xdr_inline_decode(xdr, 8);
3736                if (unlikely(!p))
3737                        goto out_overflow;
3738                xdr_decode_hyper(p, res);
3739                bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3740        }
3741        dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3742        return status;
3743out_overflow:
3744        print_overflow_msg(__func__, xdr);
3745        return -EIO;
3746}
3747
3748static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3749{
3750        __be32 *p;
3751        int status = 0;
3752
3753        *maxlink = 1;
3754        if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3755                return -EIO;
3756        if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3757                p = xdr_inline_decode(xdr, 4);
3758                if (unlikely(!p))
3759                        goto out_overflow;
3760                *maxlink = be32_to_cpup(p);
3761                bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3762        }
3763        dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3764        return status;
3765out_overflow:
3766        print_overflow_msg(__func__, xdr);
3767        return -EIO;
3768}
3769
3770static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3771{
3772        __be32 *p;
3773        int status = 0;
3774
3775        *maxname = 1024;
3776        if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3777                return -EIO;
3778        if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3779                p = xdr_inline_decode(xdr, 4);
3780                if (unlikely(!p))
3781                        goto out_overflow;
3782                *maxname = be32_to_cpup(p);
3783                bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3784        }
3785        dprintk("%s: maxname=%u\n", __func__, *maxname);
3786        return status;
3787out_overflow:
3788        print_overflow_msg(__func__, xdr);
3789        return -EIO;
3790}
3791
3792static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3793{
3794        __be32 *p;
3795        int status = 0;
3796
3797        *res = 1024;
3798        if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3799                return -EIO;
3800        if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3801                uint64_t maxread;
3802                p = xdr_inline_decode(xdr, 8);
3803                if (unlikely(!p))
3804                        goto out_overflow;
3805                xdr_decode_hyper(p, &maxread);
3806                if (maxread > 0x7FFFFFFF)
3807                        maxread = 0x7FFFFFFF;
3808                *res = (uint32_t)maxread;
3809                bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3810        }
3811        dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3812        return status;
3813out_overflow:
3814        print_overflow_msg(__func__, xdr);
3815        return -EIO;
3816}
3817
3818static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3819{
3820        __be32 *p;
3821        int status = 0;
3822
3823        *res = 1024;
3824        if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3825                return -EIO;
3826        if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3827                uint64_t maxwrite;
3828                p = xdr_inline_decode(xdr, 8);
3829                if (unlikely(!p))
3830                        goto out_overflow;
3831                xdr_decode_hyper(p, &maxwrite);
3832                if (maxwrite > 0x7FFFFFFF)
3833                        maxwrite = 0x7FFFFFFF;
3834                *res = (uint32_t)maxwrite;
3835                bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3836        }
3837        dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3838        return status;
3839out_overflow:
3840        print_overflow_msg(__func__, xdr);
3841        return -EIO;
3842}
3843
3844static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3845{
3846        uint32_t tmp;
3847        __be32 *p;
3848        int ret = 0;
3849
3850        *mode = 0;
3851        if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3852                return -EIO;
3853        if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3854                p = xdr_inline_decode(xdr, 4);
3855                if (unlikely(!p))
3856                        goto out_overflow;
3857                tmp = be32_to_cpup(p);
3858                *mode = tmp & ~S_IFMT;
3859                bitmap[1] &= ~FATTR4_WORD1_MODE;
3860                ret = NFS_ATTR_FATTR_MODE;
3861        }
3862        dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3863        return ret;
3864out_overflow:
3865        print_overflow_msg(__func__, xdr);
3866        return -EIO;
3867}
3868
3869static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3870{
3871        __be32 *p;
3872        int ret = 0;
3873
3874        *nlink = 1;
3875        if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3876                return -EIO;
3877        if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3878                p = xdr_inline_decode(xdr, 4);
3879                if (unlikely(!p))
3880                        goto out_overflow;
3881                *nlink = be32_to_cpup(p);
3882                bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3883                ret = NFS_ATTR_FATTR_NLINK;
3884        }
3885        dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3886        return ret;
3887out_overflow:
3888        print_overflow_msg(__func__, xdr);
3889        return -EIO;
3890}
3891
3892static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3893                const struct nfs_server *server, kuid_t *uid,
3894                struct nfs4_string *owner_name)
3895{
3896        uint32_t len;
3897        __be32 *p;
3898        int ret = 0;
3899
3900        *uid = make_kuid(&init_user_ns, -2);
3901        if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3902                return -EIO;
3903        if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3904                p = xdr_inline_decode(xdr, 4);
3905                if (unlikely(!p))
3906                        goto out_overflow;
3907                len = be32_to_cpup(p);
3908                p = xdr_inline_decode(xdr, len);
3909                if (unlikely(!p))
3910                        goto out_overflow;
3911                if (owner_name != NULL) {
3912                        owner_name->data = kmemdup(p, len, GFP_NOWAIT);
3913                        if (owner_name->data != NULL) {
3914                                owner_name->len = len;
3915                                ret = NFS_ATTR_FATTR_OWNER_NAME;
3916                        }
3917                } else if (len < XDR_MAX_NETOBJ) {
3918                        if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3919                                ret = NFS_ATTR_FATTR_OWNER;
3920                        else
3921                                dprintk("%s: nfs_map_name_to_uid failed!\n",
3922                                                __func__);
3923                } else
3924                        dprintk("%s: name too long (%u)!\n",
3925                                        __func__, len);
3926                bitmap[1] &= ~FATTR4_WORD1_OWNER;
3927        }
3928        dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3929        return ret;
3930out_overflow:
3931        print_overflow_msg(__func__, xdr);
3932        return -EIO;
3933}
3934
3935static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3936                const struct nfs_server *server, kgid_t *gid,
3937                struct nfs4_string *group_name)
3938{
3939        uint32_t len;
3940        __be32 *p;
3941        int ret = 0;
3942
3943        *gid = make_kgid(&init_user_ns, -2);
3944        if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3945                return -EIO;
3946        if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3947                p = xdr_inline_decode(xdr, 4);
3948                if (unlikely(!p))
3949                        goto out_overflow;
3950                len = be32_to_cpup(p);
3951                p = xdr_inline_decode(xdr, len);
3952                if (unlikely(!p))
3953                        goto out_overflow;
3954                if (group_name != NULL) {
3955                        group_name->data = kmemdup(p, len, GFP_NOWAIT);
3956                        if (group_name->data != NULL) {
3957                                group_name->len = len;
3958                                ret = NFS_ATTR_FATTR_GROUP_NAME;
3959                        }
3960                } else if (len < XDR_MAX_NETOBJ) {
3961                        if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3962                                ret = NFS_ATTR_FATTR_GROUP;
3963                        else
3964                                dprintk("%s: nfs_map_group_to_gid failed!\n",
3965                                                __func__);
3966                } else
3967                        dprintk("%s: name too long (%u)!\n",
3968                                        __func__, len);
3969                bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3970        }
3971        dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3972        return ret;
3973out_overflow:
3974        print_overflow_msg(__func__, xdr);
3975        return -EIO;
3976}
3977
3978static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3979{
3980        uint32_t major = 0, minor = 0;
3981        __be32 *p;
3982        int ret = 0;
3983
3984        *rdev = MKDEV(0,0);
3985        if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3986                return -EIO;
3987        if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3988                dev_t tmp;
3989
3990                p = xdr_inline_decode(xdr, 8);
3991                if (unlikely(!p))
3992                        goto out_overflow;
3993                major = be32_to_cpup(p++);
3994                minor = be32_to_cpup(p);
3995                tmp = MKDEV(major, minor);
3996                if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3997                        *rdev = tmp;
3998                bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3999                ret = NFS_ATTR_FATTR_RDEV;
4000        }

4001        dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
4002        return ret;
4003out_overflow:
4004        print_overflow_msg(__func__, xdr);
4005        return -EIO;
4006}
4007
4008static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4009{
4010        __be32 *p;
4011        int status = 0;
4012
4013        *res = 0;
4014        if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
4015                return -EIO;
4016        if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
4017                p = xdr_inline_decode(xdr, 8);
4018                if (unlikely(!p))
4019                        goto out_overflow;
4020                xdr_decode_hyper(p, res);
4021                bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
4022        }
4023        dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
4024        return status;
4025out_overflow:
4026        print_overflow_msg(__func__, xdr);
4027        return -EIO;
4028}
4029
4030static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4031{
4032        __be32 *p;
4033        int status = 0;
4034
4035        *res = 0;
4036        if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
4037                return -EIO;
4038        if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
4039                p = xdr_inline_decode(xdr, 8);
4040                if (unlikely(!p))
4041                        goto out_overflow;
4042                xdr_decode_hyper(p, res);
4043                bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
4044        }
4045        dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
4046        return status;
4047out_overflow:
4048        print_overflow_msg(__func__, xdr);
4049        return -EIO;
4050}
4051
4052static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4053{
4054        __be32 *p;
4055        int status = 0;
4056
4057        *res = 0;
4058        if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
4059                return -EIO;
4060        if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
4061                p = xdr_inline_decode(xdr, 8);
4062                if (unlikely(!p))
4063                        goto out_overflow;
4064                xdr_decode_hyper(p, res);
4065                bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
4066        }
4067        dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4068        return status;
4069out_overflow:
4070        print_overflow_msg(__func__, xdr);
4071        return -EIO;
4072}
4073
4074static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4075{
4076        __be32 *p;
4077        int ret = 0;
4078
4079        *used = 0;
4080        if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4081                return -EIO;
4082        if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4083                p = xdr_inline_decode(xdr, 8);
4084                if (unlikely(!p))
4085                        goto out_overflow;
4086                xdr_decode_hyper(p, used);
4087                bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4088                ret = NFS_ATTR_FATTR_SPACE_USED;
4089        }
4090        dprintk("%s: space used=%Lu\n", __func__,
4091                        (unsigned long long)*used);
4092        return ret;
4093out_overflow:
4094        print_overflow_msg(__func__, xdr);
4095        return -EIO;
4096}
4097
4098static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
4099{
4100        __be32 *p;
4101        uint64_t sec;
4102        uint32_t nsec;
4103
4104        p = xdr_inline_decode(xdr, 12);
4105        if (unlikely(!p))
4106                goto out_overflow;
4107        p = xdr_decode_hyper(p, &sec);
4108        nsec = be32_to_cpup(p);
4109        time->tv_sec = (time_t)sec;
4110        time->tv_nsec = (long)nsec;
4111        return 0;
4112out_overflow:
4113        print_overflow_msg(__func__, xdr);
4114        return -EIO;
4115}
4116
4117static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4118{
4119        int status = 0;
4120
4121        time->tv_sec = 0;
4122        time->tv_nsec = 0;
4123        if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4124                return -EIO;
4125        if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4126                status = decode_attr_time(xdr, time);
4127                if (status == 0)
4128                        status = NFS_ATTR_FATTR_ATIME;
4129                bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4130        }
4131        dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4132        return status;
4133}
4134
4135static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4136{
4137        int status = 0;
4138
4139        time->tv_sec = 0;
4140        time->tv_nsec = 0;
4141        if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4142                return -EIO;
4143        if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4144                status = decode_attr_time(xdr, time);
4145                if (status == 0)
4146                        status = NFS_ATTR_FATTR_CTIME;
4147                bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4148        }
4149        dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4150        return status;
4151}
4152
4153static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4154                                  struct timespec *time)
4155{
4156        int status = 0;
4157
4158        time->tv_sec = 0;
4159        time->tv_nsec = 0;
4160        if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4161                return -EIO;
4162        if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4163                status = decode_attr_time(xdr, time);
4164                bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4165        }
4166        dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4167                (long)time->tv_nsec);
4168        return status;
4169}
4170
4171static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4172                                        struct nfs4_label *label)
4173{
4174        uint32_t pi = 0;
4175        uint32_t lfs = 0;
4176        __u32 len;
4177        __be32 *p;
4178        int status = 0;
4179
4180        if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4181                return -EIO;
4182        if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4183                p = xdr_inline_decode(xdr, 4);
4184                if (unlikely(!p))
4185                        goto out_overflow;
4186                lfs = be32_to_cpup(p++);
4187                p = xdr_inline_decode(xdr, 4);
4188                if (unlikely(!p))
4189                        goto out_overflow;
4190                pi = be32_to_cpup(p++);
4191                p = xdr_inline_decode(xdr, 4);
4192                if (unlikely(!p))
4193                        goto out_overflow;
4194                len = be32_to_cpup(p++);
4195                p = xdr_inline_decode(xdr, len);
4196                if (unlikely(!p))
4197                        goto out_overflow;
4198                if (len < NFS4_MAXLABELLEN) {
4199                        if (label) {
4200                                memcpy(label->label, p, len);
4201                                label->len = len;
4202                                label->pi = pi;
4203                                label->lfs = lfs;
4204                                status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4205                        }
4206                        bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4207                } else
4208                        printk(KERN_WARNING "%s: label too long (%u)!\n",
4209                                        __func__, len);
4210        }
4211        if (label && label->label)
4212                dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4213                        (char *)label->label, label->len, label->pi, label->lfs);
4214        return status;
4215
4216out_overflow:
4217        print_overflow_msg(__func__, xdr);
4218        return -EIO;
4219}
4220
4221static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4222{
4223        int status = 0;
4224
4225        time->tv_sec = 0;
4226        time->tv_nsec = 0;
4227        if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4228                return -EIO;
4229        if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4230                status = decode_attr_time(xdr, time);
4231                if (status == 0)
4232                        status = NFS_ATTR_FATTR_MTIME;
4233                bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4234        }
4235        dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4236        return status;
4237}
4238
4239static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4240{
4241        unsigned int attrwords = XDR_QUADLEN(attrlen);
4242        unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4243
4244        if (unlikely(attrwords != nwords)) {
4245                dprintk("%s: server returned incorrect attribute length: "
4246                        "%u %c %u\n",
4247                                __func__,
4248                                attrwords << 2,
4249                                (attrwords < nwords) ? '<' : '>',
4250                                nwords << 2);
4251                return -EIO;
4252        }
4253        return 0;
4254}
4255
4256static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4257{
4258        __be32 *p;
4259
4260        p = xdr_inline_decode(xdr, 20);
4261        if (unlikely(!p))
4262                goto out_overflow;
4263        cinfo->atomic = be32_to_cpup(p++);
4264        p = xdr_decode_hyper(p, &cinfo->before);
4265        xdr_decode_hyper(p, &cinfo->after);
4266        return 0;
4267out_overflow:
4268        print_overflow_msg(__func__, xdr);
4269        return -EIO;
4270}
4271
4272static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4273{
4274        __be32 *p;
4275        uint32_t supp, acc;
4276        int status;
4277
4278        status = decode_op_hdr(xdr, OP_ACCESS);
4279        if (status)
4280                return status;
4281        p = xdr_inline_decode(xdr, 8);
4282        if (unlikely(!p))
4283                goto out_overflow;
4284        supp = be32_to_cpup(p++);
4285        acc = be32_to_cpup(p);
4286        *supported = supp;
4287        *access = acc;
4288        return 0;
4289out_overflow:
4290        print_overflow_msg(__func__, xdr);
4291        return -EIO;
4292}
4293
4294static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4295{
4296        __be32 *p;
4297
4298        p = xdr_inline_decode(xdr, len);
4299        if (likely(p)) {
4300                memcpy(buf, p, len);
4301                return 0;
4302        }
4303        print_overflow_msg(__func__, xdr);
4304        return -EIO;
4305}
4306
4307static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4308{
4309        return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4310}
4311
4312static int decode_open_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4313{
4314        stateid->type = NFS4_OPEN_STATEID_TYPE;
4315        return decode_stateid(xdr, stateid);
4316}
4317
4318static int decode_lock_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4319{
4320        stateid->type = NFS4_LOCK_STATEID_TYPE;
4321        return decode_stateid(xdr, stateid);
4322}
4323
4324static int decode_delegation_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4325{
4326        stateid->type = NFS4_DELEGATION_STATEID_TYPE;
4327        return decode_stateid(xdr, stateid);
4328}
4329
4330static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4331{
4332        int status;
4333
4334        status = decode_op_hdr(xdr, OP_CLOSE);
4335        if (status != -EIO)
4336                nfs_increment_open_seqid(status, res->seqid);
4337        if (!status)
4338                status = decode_open_stateid(xdr, &res->stateid);
4339        return status;
4340}
4341
4342static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4343{
4344        return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4345}
4346
4347static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4348{
4349        return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4350}
4351
4352static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4353{
4354        int status;
4355
4356        status = decode_op_hdr(xdr, OP_COMMIT);
4357        if (!status)
4358                status = decode_write_verifier(xdr, &res->verf->verifier);
4359        return status;
4360}
4361
4362static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4363{
4364        __be32 *p;
4365        uint32_t bmlen;
4366        int status;
4367
4368        status = decode_op_hdr(xdr, OP_CREATE);
4369        if (status)
4370                return status;
4371        if ((status = decode_change_info(xdr, cinfo)))
4372                return status;
4373        p = xdr_inline_decode(xdr, 4);
4374        if (unlikely(!p))
4375                goto out_overflow;
4376        bmlen = be32_to_cpup(p);
4377        p = xdr_inline_decode(xdr, bmlen << 2);
4378        if (likely(p))
4379                return 0;
4380out_overflow:
4381        print_overflow_msg(__func__, xdr);
4382        return -EIO;
4383}
4384
4385static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4386{
4387        unsigned int savep;
4388        uint32_t attrlen, bitmap[3] = {0};
4389        int status;
4390
4391        if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4392                goto xdr_error;
4393        if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4394                goto xdr_error;
4395        if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4396                goto xdr_error;
4397        if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4398                goto xdr_error;
4399        if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4400                                                 &res->fh_expire_type)) != 0)
4401                goto xdr_error;
4402        if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4403                goto xdr_error;
4404        if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4405                goto xdr_error;
4406        if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4407                goto xdr_error;
4408        if ((status = decode_attr_exclcreat_supported(xdr, bitmap,
4409                                res->exclcreat_bitmask)) != 0)
4410                goto xdr_error;
4411        status = verify_attr_len(xdr, savep, attrlen);
4412xdr_error:
4413        dprintk("%s: xdr returned %d!\n", __func__, -status);
4414        return status;
4415}
4416
4417static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4418{
4419        unsigned int savep;
4420        uint32_t attrlen, bitmap[3] = {0};
4421        int status;
4422
4423        if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4424                goto xdr_error;
4425        if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4426                goto xdr_error;
4427        if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4428                goto xdr_error;
4429
4430        if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4431                goto xdr_error;
4432        if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4433                goto xdr_error;
4434        if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4435                goto xdr_error;
4436
4437        status = -EIO;
4438        if (unlikely(bitmap[0]))
4439                goto xdr_error;
4440
4441        if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4442                goto xdr_error;
4443        if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4444                goto xdr_error;
4445        if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4446                goto xdr_error;
4447
4448        status = verify_attr_len(xdr, savep, attrlen);
4449xdr_error:
4450        dprintk("%s: xdr returned %d!\n", __func__, -status);
4451        return status;
4452}
4453
4454static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4455{
4456        unsigned int savep;
4457        uint32_t attrlen, bitmap[3] = {0};
4458        int status;
4459
4460        if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4461                goto xdr_error;
4462        if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4463                goto xdr_error;
4464        if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4465                goto xdr_error;
4466
4467        if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4468                goto xdr_error;
4469        if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4470                goto xdr_error;
4471
4472        status = verify_attr_len(xdr, savep, attrlen);
4473xdr_error:
4474        dprintk("%s: xdr returned %d!\n", __func__, -status);
4475        return status;
4476}
4477
4478static int decode_threshold_hint(struct xdr_stream *xdr,
4479                                  uint32_t *bitmap,
4480                                  uint64_t *res,
4481                                  uint32_t hint_bit)
4482{
4483        __be32 *p;
4484
4485        *res = 0;
4486        if (likely(bitmap[0] & hint_bit)) {
4487                p = xdr_inline_decode(xdr, 8);
4488                if (unlikely(!p))
4489                        goto out_overflow;
4490                xdr_decode_hyper(p, res);
4491        }
4492        return 0;
4493out_overflow:
4494        print_overflow_msg(__func__, xdr);
4495        return -EIO;
4496}
4497
4498static int decode_first_threshold_item4(struct xdr_stream *xdr,
4499                                        struct nfs4_threshold *res)
4500{
4501        __be32 *p;
4502        unsigned int savep;
4503        uint32_t bitmap[3] = {0,}, attrlen;
4504        int status;
4505
4506        /* layout type */
4507        p = xdr_inline_decode(xdr, 4);
4508        if (unlikely(!p)) {
4509                print_overflow_msg(__func__, xdr);
4510                return -EIO;
4511        }
4512        res->l_type = be32_to_cpup(p);
4513
4514        /* thi_hintset bitmap */
4515        status = decode_attr_bitmap(xdr, bitmap);
4516        if (status < 0)
4517                goto xdr_error;
4518
4519        /* thi_hintlist length */
4520        status = decode_attr_length(xdr, &attrlen, &savep);
4521        if (status < 0)
4522                goto xdr_error;
4523        /* thi_hintlist */
4524        status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4525        if (status < 0)
4526                goto xdr_error;
4527        status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4528        if (status < 0)
4529                goto xdr_error;
4530        status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4531                                       THRESHOLD_RD_IO);
4532        if (status < 0)
4533                goto xdr_error;
4534        status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4535                                       THRESHOLD_WR_IO);
4536        if (status < 0)
4537                goto xdr_error;
4538
4539        status = verify_attr_len(xdr, savep, attrlen);
4540        res->bm = bitmap[0];
4541
4542        dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4543                 __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4544                res->wr_io_sz);
4545xdr_error:
4546        dprintk("%s ret=%d!\n", __func__, status);
4547        return status;
4548}
4549
4550/*
4551 * Thresholds on pNFS direct I/O vrs MDS I/O
4552 */
4553static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4554                                    uint32_t *bitmap,
4555                                    struct nfs4_threshold *res)
4556{
4557        __be32 *p;
4558        int status = 0;
4559        uint32_t num;
4560
4561        if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4562                return -EIO;
4563        if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4564                /* Did the server return an unrequested attribute? */
4565                if (unlikely(res == NULL))
4566                        return -EREMOTEIO;
4567                p = xdr_inline_decode(xdr, 4);
4568                if (unlikely(!p))
4569                        goto out_overflow;
4570                num = be32_to_cpup(p);
4571                if (num == 0)
4572                        return 0;
4573                if (num > 1)
4574                        printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4575                                "drivers per filesystem not supported\n",
4576                                __func__);
4577
4578                status = decode_first_threshold_item4(xdr, res);
4579                bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4580        }
4581        return status;
4582out_overflow:
4583        print_overflow_msg(__func__, xdr);
4584        return -EIO;
4585}
4586
4587static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4588                struct nfs_fattr *fattr, struct nfs_fh *fh,
4589                struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4590                const struct nfs_server *server)
4591{
4592        int status;
4593        umode_t fmode = 0;
4594        uint32_t type;
4595        int32_t err;
4596
4597        status = decode_attr_type(xdr, bitmap, &type);
4598        if (status < 0)
4599                goto xdr_error;
4600        fattr->mode = 0;
4601        if (status != 0) {
4602                fattr->mode |= nfs_type2fmt[type];
4603                fattr->valid |= status;
4604        }
4605
4606        status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4607        if (status < 0)
4608                goto xdr_error;
4609        fattr->valid |= status;
4610
4611        status = decode_attr_size(xdr, bitmap, &fattr->size);
4612        if (status < 0)
4613                goto xdr_error;
4614        fattr->valid |= status;
4615
4616        status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4617        if (status < 0)
4618                goto xdr_error;
4619        fattr->valid |= status;
4620
4621        err = 0;
4622        status = decode_attr_error(xdr, bitmap, &err);
4623        if (status < 0)
4624                goto xdr_error;
4625
4626        status = decode_attr_filehandle(xdr, bitmap, fh);
4627        if (status < 0)
4628                goto xdr_error;
4629
4630        status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4631        if (status < 0)
4632                goto xdr_error;
4633        fattr->valid |= status;
4634
4635        status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4636        if (status < 0)
4637                goto xdr_error;
4638        fattr->valid |= status;
4639
4640        status = -EIO;
4641        if (unlikely(bitmap[0]))
4642                goto xdr_error;
4643
4644        status = decode_attr_mode(xdr, bitmap, &fmode);
4645        if (status < 0)
4646                goto xdr_error;
4647        if (status != 0) {
4648                fattr->mode |= fmode;
4649                fattr->valid |= status;
4650        }
4651
4652        status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4653        if (status < 0)
4654                goto xdr_error;
4655        fattr->valid |= status;
4656
4657        status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4658        if (status < 0)
4659                goto xdr_error;
4660        fattr->valid |= status;
4661
4662        status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4663        if (status < 0)
4664                goto xdr_error;
4665        fattr->valid |= status;
4666
4667        status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4668        if (status < 0)
4669                goto xdr_error;
4670        fattr->valid |= status;
4671
4672        status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4673        if (status < 0)
4674                goto xdr_error;
4675        fattr->valid |= status;
4676
4677        status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4678        if (status < 0)
4679                goto xdr_error;
4680        fattr->valid |= status;
4681
4682        status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4683        if (status < 0)
4684                goto xdr_error;
4685        fattr->valid |= status;
4686
4687        status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4688        if (status < 0)
4689                goto xdr_error;
4690        fattr->valid |= status;
4691
4692        status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4693        if (status < 0)
4694                goto xdr_error;
4695        fattr->valid |= status;
4696
4697        status = -EIO;
4698        if (unlikely(bitmap[1]))
4699                goto xdr_error;
4700
4701        status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4702        if (status < 0)
4703                goto xdr_error;
4704
4705        if (label) {
4706                status = decode_attr_security_label(xdr, bitmap, label);
4707                if (status < 0)
4708                        goto xdr_error;
4709                fattr->valid |= status;
4710        }
4711
4712xdr_error:
4713        dprintk("%s: xdr returned %d\n", __func__, -status);
4714        return status;
4715}
4716
4717static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4718                struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4719                struct nfs4_label *label, const struct nfs_server *server)
4720{
4721        unsigned int savep;
4722        uint32_t attrlen,
4723                 bitmap[3] = {0};
4724        int status;
4725
4726        status = decode_op_hdr(xdr, OP_GETATTR);
4727        if (status < 0)
4728                goto xdr_error;
4729
4730        status = decode_attr_bitmap(xdr, bitmap);
4731        if (status < 0)
4732                goto xdr_error;
4733
4734        status = decode_attr_length(xdr, &attrlen, &savep);
4735        if (status < 0)
4736                goto xdr_error;
4737
4738        status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4739                                        label, server);
4740        if (status < 0)
4741                goto xdr_error;
4742
4743        status = verify_attr_len(xdr, savep, attrlen);
4744xdr_error:
4745        dprintk("%s: xdr returned %d\n", __func__, -status);
4746        return status;
4747}
4748
4749static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4750                struct nfs4_label *label, const struct nfs_server *server)
4751{
4752        return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4753}
4754
4755static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4756                const struct nfs_server *server)
4757{
4758        return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4759}
4760
4761/*
4762 * Decode potentially multiple layout types.
4763 */
4764static int decode_pnfs_layout_types(struct xdr_stream *xdr,
4765                                    struct nfs_fsinfo *fsinfo)
4766{
4767        __be32 *p;
4768        uint32_t i;
4769
4770        p = xdr_inline_decode(xdr, 4);
4771        if (unlikely(!p))
4772                goto out_overflow;
4773        fsinfo->nlayouttypes = be32_to_cpup(p);
4774
4775        /* pNFS is not supported by the underlying file system */
4776        if (fsinfo->nlayouttypes == 0)
4777                return 0;
4778
4779        /* Decode and set first layout type, move xdr->p past unused types */
4780        p = xdr_inline_decode(xdr, fsinfo->nlayouttypes * 4);
4781        if (unlikely(!p))
4782                goto out_overflow;
4783
4784        /* If we get too many, then just cap it at the max */
4785        if (fsinfo->nlayouttypes > NFS_MAX_LAYOUT_TYPES) {
4786                printk(KERN_INFO "NFS: %s: Warning: Too many (%u) pNFS layout types\n",
4787                        __func__, fsinfo->nlayouttypes);
4788                fsinfo->nlayouttypes = NFS_MAX_LAYOUT_TYPES;
4789        }
4790
4791        for(i = 0; i < fsinfo->nlayouttypes; ++i)
4792                fsinfo->layouttype[i] = be32_to_cpup(p++);
4793        return 0;
4794out_overflow:
4795        print_overflow_msg(__func__, xdr);
4796        return -EIO;
4797}
4798
4799/*
4800 * The type of file system exported.
4801 * Note we must ensure that layouttype is set in any non-error case.
4802 */
4803static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4804                                struct nfs_fsinfo *fsinfo)
4805{
4806        int status = 0;
4807
4808        dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4809        if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4810                return -EIO;
4811        if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4812                status = decode_pnfs_layout_types(xdr, fsinfo);
4813                bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4814        }
4815        return status;
4816}
4817
4818/*
4819 * The prefered block size for layout directed io
4820 */
4821static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4822                                      uint32_t *res)
4823{
4824        __be32 *p;
4825
4826        dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4827        *res = 0;
4828        if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4829                p = xdr_inline_decode(xdr, 4);
4830                if (unlikely(!p)) {
4831                        print_overflow_msg(__func__, xdr);
4832                        return -EIO;
4833                }
4834                *res = be32_to_cpup(p);
4835                bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4836        }
4837        return 0;
4838}
4839
4840/*
4841 * The granularity of a CLONE operation.
4842 */
4843static int decode_attr_clone_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4844                                     uint32_t *res)
4845{
4846        __be32 *p;
4847
4848        dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4849        *res = 0;
4850        if (bitmap[2] & FATTR4_WORD2_CLONE_BLKSIZE) {
4851                p = xdr_inline_decode(xdr, 4);
4852                if (unlikely(!p)) {
4853                        print_overflow_msg(__func__, xdr);
4854                        return -EIO;
4855                }
4856                *res = be32_to_cpup(p);
4857                bitmap[2] &= ~FATTR4_WORD2_CLONE_BLKSIZE;
4858        }
4859        return 0;
4860}
4861
4862static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4863{
4864        unsigned int savep;
4865        uint32_t attrlen, bitmap[3];
4866        int status;
4867
4868        if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4869                goto xdr_error;
4870        if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4871                goto xdr_error;
4872        if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4873                goto xdr_error;
4874
4875        fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4876
4877        if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4878                goto xdr_error;
4879        if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4880                goto xdr_error;
4881        if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4882                goto xdr_error;
4883        fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4884        if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4885                goto xdr_error;
4886        fsinfo->wtpref = fsinfo->wtmax;
4887
4888        status = -EIO;
4889        if (unlikely(bitmap[0]))
4890                goto xdr_error;
4891
4892        status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4893        if (status != 0)
4894                goto xdr_error;
4895        status = decode_attr_pnfstype(xdr, bitmap, fsinfo);
4896        if (status != 0)
4897                goto xdr_error;
4898
4899        status = -EIO;
4900        if (unlikely(bitmap[1]))
4901                goto xdr_error;
4902
4903        status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4904        if (status)
4905                goto xdr_error;
4906        status = decode_attr_clone_blksize(xdr, bitmap, &fsinfo->clone_blksize);
4907        if (status)
4908                goto xdr_error;
4909
4910        status = verify_attr_len(xdr, savep, attrlen);
4911xdr_error:
4912        dprintk("%s: xdr returned %d!\n", __func__, -status);
4913        return status;
4914}
4915
4916static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4917{
4918        __be32 *p;
4919        uint32_t len;
4920        int status;
4921
4922        /* Zero handle first to allow comparisons */
4923        memset(fh, 0, sizeof(*fh));
4924
4925        status = decode_op_hdr(xdr, OP_GETFH);
4926        if (status)
4927                return status;
4928
4929        p = xdr_inline_decode(xdr, 4);
4930        if (unlikely(!p))
4931                goto out_overflow;
4932        len = be32_to_cpup(p);
4933        if (len > NFS4_FHSIZE)
4934                return -EIO;
4935        fh->size = len;
4936        p = xdr_inline_decode(xdr, len);
4937        if (unlikely(!p))
4938                goto out_overflow;
4939        memcpy(fh->data, p, len);
4940        return 0;
4941out_overflow:
4942        print_overflow_msg(__func__, xdr);
4943        return -EIO;
4944}
4945
4946static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4947{
4948        int status;
4949
4950        status = decode_op_hdr(xdr, OP_LINK);
4951        if (status)
4952                return status;
4953        return decode_change_info(xdr, cinfo);
4954}
4955
4956/*
4957 * We create the owner, so we know a proper owner.id length is 4.
4958 */
4959static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4960{
4961        uint64_t offset, length, clientid;
4962        __be32 *p;
4963        uint32_t namelen, type;
4964
4965        p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4966        if (unlikely(!p))
4967                goto out_overflow;
4968        p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4969        p = xdr_decode_hyper(p, &length);
4970        type = be32_to_cpup(p++); /* 4 byte read */
4971        if (fl != NULL) { /* manipulate file lock */
4972                fl->fl_start = (loff_t)offset;
4973                fl->fl_end = fl->fl_start + (loff_t)length - 1;
4974                if (length == ~(uint64_t)0)
4975                        fl->fl_end = OFFSET_MAX;
4976                fl->fl_type = F_WRLCK;
4977                if (type & 1)
4978                        fl->fl_type = F_RDLCK;
4979                fl->fl_pid = 0;
4980        }
4981        p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4982        namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4983        p = xdr_inline_decode(xdr, namelen); /* variable size field */
4984        if (likely(p))
4985                return -NFS4ERR_DENIED;
4986out_overflow:
4987        print_overflow_msg(__func__, xdr);
4988        return -EIO;
4989}
4990
4991static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4992{
4993        int status;
4994
4995        status = decode_op_hdr(xdr, OP_LOCK);
4996        if (status == -EIO)
4997                goto out;
4998        if (status == 0) {
4999                status = decode_lock_stateid(xdr, &res->stateid);
5000                if (unlikely(status))

5001                        goto out;
5002        } else if (status == -NFS4ERR_DENIED)
5003                status = decode_lock_denied(xdr, NULL);
5004        if (res->open_seqid != NULL)
5005                nfs_increment_open_seqid(status, res->open_seqid);
5006        nfs_increment_lock_seqid(status, res->lock_seqid);
5007out:
5008        return status;
5009}
5010
5011static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
5012{
5013        int status;
5014        status = decode_op_hdr(xdr, OP_LOCKT);
5015        if (status == -NFS4ERR_DENIED)
5016                return decode_lock_denied(xdr, res->denied);
5017        return status;
5018}
5019
5020static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
5021{
5022        int status;
5023
5024        status = decode_op_hdr(xdr, OP_LOCKU);
5025        if (status != -EIO)
5026                nfs_increment_lock_seqid(status, res->seqid);
5027        if (status == 0)
5028                status = decode_lock_stateid(xdr, &res->stateid);
5029        return status;
5030}
5031
5032static int decode_release_lockowner(struct xdr_stream *xdr)
5033{
5034        return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
5035}
5036
5037static int decode_lookup(struct xdr_stream *xdr)
5038{
5039        return decode_op_hdr(xdr, OP_LOOKUP);
5040}
5041
5042/* This is too sick! */
5043static int decode_space_limit(struct xdr_stream *xdr,
5044                unsigned long *pagemod_limit)
5045{
5046        __be32 *p;
5047        uint32_t limit_type, nblocks, blocksize;
5048        u64 maxsize = 0;
5049
5050        p = xdr_inline_decode(xdr, 12);
5051        if (unlikely(!p))
5052                goto out_overflow;
5053        limit_type = be32_to_cpup(p++);
5054        switch (limit_type) {
5055        case NFS4_LIMIT_SIZE:
5056                xdr_decode_hyper(p, &maxsize);
5057                break;
5058        case NFS4_LIMIT_BLOCKS:
5059                nblocks = be32_to_cpup(p++);
5060                blocksize = be32_to_cpup(p);
5061                maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
5062        }
5063        maxsize >>= PAGE_CACHE_SHIFT;
5064        *pagemod_limit = min_t(u64, maxsize, ULONG_MAX);
5065        return 0;
5066out_overflow:
5067        print_overflow_msg(__func__, xdr);
5068        return -EIO;
5069}
5070
5071static int decode_rw_delegation(struct xdr_stream *xdr,
5072                uint32_t delegation_type,
5073                struct nfs_openres *res)
5074{
5075        __be32 *p;
5076        int status;
5077
5078        status = decode_delegation_stateid(xdr, &res->delegation);
5079        if (unlikely(status))
5080                return status;
5081        p = xdr_inline_decode(xdr, 4);
5082        if (unlikely(!p))
5083                goto out_overflow;
5084        res->do_recall = be32_to_cpup(p);
5085
5086        switch (delegation_type) {
5087        case NFS4_OPEN_DELEGATE_READ:
5088                res->delegation_type = FMODE_READ;
5089                break;
5090        case NFS4_OPEN_DELEGATE_WRITE:
5091                res->delegation_type = FMODE_WRITE|FMODE_READ;
5092                if (decode_space_limit(xdr, &res->pagemod_limit) < 0)
5093                                return -EIO;
5094        }
5095        return decode_ace(xdr, NULL, res->server->nfs_client);
5096out_overflow:
5097        print_overflow_msg(__func__, xdr);
5098        return -EIO;
5099}
5100
5101static int decode_no_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5102{
5103        __be32 *p;
5104        uint32_t why_no_delegation;
5105
5106        p = xdr_inline_decode(xdr, 4);
5107        if (unlikely(!p))
5108                goto out_overflow;
5109        why_no_delegation = be32_to_cpup(p);
5110        switch (why_no_delegation) {
5111                case WND4_CONTENTION:
5112                case WND4_RESOURCE:
5113                        xdr_inline_decode(xdr, 4);
5114                        /* Ignore for now */
5115        }
5116        return 0;
5117out_overflow:
5118        print_overflow_msg(__func__, xdr);
5119        return -EIO;
5120}
5121
5122static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5123{
5124        __be32 *p;
5125        uint32_t delegation_type;
5126
5127        p = xdr_inline_decode(xdr, 4);
5128        if (unlikely(!p))
5129                goto out_overflow;
5130        delegation_type = be32_to_cpup(p);
5131        res->delegation_type = 0;
5132        switch (delegation_type) {
5133        case NFS4_OPEN_DELEGATE_NONE:
5134                return 0;
5135        case NFS4_OPEN_DELEGATE_READ:
5136        case NFS4_OPEN_DELEGATE_WRITE:
5137                return decode_rw_delegation(xdr, delegation_type, res);
5138        case NFS4_OPEN_DELEGATE_NONE_EXT:
5139                return decode_no_delegation(xdr, res);
5140        }
5141        return -EIO;
5142out_overflow:
5143        print_overflow_msg(__func__, xdr);
5144        return -EIO;
5145}
5146
5147static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
5148{
5149        __be32 *p;
5150        uint32_t savewords, bmlen, i;
5151        int status;
5152
5153        if (!__decode_op_hdr(xdr, OP_OPEN, &status))
5154                return status;
5155        nfs_increment_open_seqid(status, res->seqid);
5156        if (status)
5157                return status;
5158        status = decode_open_stateid(xdr, &res->stateid);
5159        if (unlikely(status))
5160                return status;
5161
5162        decode_change_info(xdr, &res->cinfo);
5163
5164        p = xdr_inline_decode(xdr, 8);
5165        if (unlikely(!p))
5166                goto out_overflow;
5167        res->rflags = be32_to_cpup(p++);
5168        bmlen = be32_to_cpup(p);
5169        if (bmlen > 10)
5170                goto xdr_error;
5171
5172        p = xdr_inline_decode(xdr, bmlen << 2);
5173        if (unlikely(!p))
5174                goto out_overflow;
5175        savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5176        for (i = 0; i < savewords; ++i)
5177                res->attrset[i] = be32_to_cpup(p++);
5178        for (; i < NFS4_BITMAP_SIZE; i++)
5179                res->attrset[i] = 0;
5180
5181        return decode_delegation(xdr, res);
5182xdr_error:
5183        dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5184        return -EIO;
5185out_overflow:
5186        print_overflow_msg(__func__, xdr);
5187        return -EIO;
5188}
5189
5190static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5191{
5192        int status;
5193
5194        status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5195        if (status != -EIO)
5196                nfs_increment_open_seqid(status, res->seqid);
5197        if (!status)
5198                status = decode_open_stateid(xdr, &res->stateid);
5199        return status;
5200}
5201
5202static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5203{
5204        int status;
5205
5206        status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5207        if (status != -EIO)
5208                nfs_increment_open_seqid(status, res->seqid);
5209        if (!status)
5210                status = decode_open_stateid(xdr, &res->stateid);
5211        return status;
5212}
5213
5214static int decode_putfh(struct xdr_stream *xdr)
5215{
5216        return decode_op_hdr(xdr, OP_PUTFH);
5217}
5218
5219static int decode_putrootfh(struct xdr_stream *xdr)
5220{
5221        return decode_op_hdr(xdr, OP_PUTROOTFH);
5222}
5223
5224static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5225                       struct nfs_pgio_res *res)
5226{
5227        __be32 *p;
5228        uint32_t count, eof, recvd;
5229        int status;
5230
5231        status = decode_op_hdr(xdr, OP_READ);
5232        if (status)
5233                return status;
5234        p = xdr_inline_decode(xdr, 8);
5235        if (unlikely(!p))
5236                goto out_overflow;
5237        eof = be32_to_cpup(p++);
5238        count = be32_to_cpup(p);
5239        recvd = xdr_read_pages(xdr, count);
5240        if (count > recvd) {
5241                dprintk("NFS: server cheating in read reply: "
5242                                "count %u > recvd %u\n", count, recvd);
5243                count = recvd;
5244                eof = 0;
5245        }
5246        res->eof = eof;
5247        res->count = count;
5248        return 0;
5249out_overflow:
5250        print_overflow_msg(__func__, xdr);
5251        return -EIO;
5252}
5253
5254static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5255{
5256        int             status;
5257        __be32          verf[2];
5258
5259        status = decode_op_hdr(xdr, OP_READDIR);
5260        if (!status)
5261                status = decode_verifier(xdr, readdir->verifier.data);
5262        if (unlikely(status))
5263                return status;
5264        memcpy(verf, readdir->verifier.data, sizeof(verf));
5265        dprintk("%s: verifier = %08x:%08x\n",
5266                        __func__, verf[0], verf[1]);
5267        return xdr_read_pages(xdr, xdr->buf->page_len);
5268}
5269
5270static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5271{
5272        struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5273        u32 len, recvd;
5274        __be32 *p;
5275        int status;
5276
5277        status = decode_op_hdr(xdr, OP_READLINK);
5278        if (status)
5279                return status;
5280
5281        /* Convert length of symlink */
5282        p = xdr_inline_decode(xdr, 4);
5283        if (unlikely(!p))
5284                goto out_overflow;
5285        len = be32_to_cpup(p);
5286        if (len >= rcvbuf->page_len || len <= 0) {
5287                dprintk("nfs: server returned giant symlink!\n");
5288                return -ENAMETOOLONG;
5289        }
5290        recvd = xdr_read_pages(xdr, len);
5291        if (recvd < len) {
5292                dprintk("NFS: server cheating in readlink reply: "
5293                                "count %u > recvd %u\n", len, recvd);
5294                return -EIO;
5295        }
5296        /*
5297         * The XDR encode routine has set things up so that
5298         * the link text will be copied directly into the
5299         * buffer.  We just have to do overflow-checking,
5300         * and and null-terminate the text (the VFS expects
5301         * null-termination).
5302         */
5303        xdr_terminate_string(rcvbuf, len);
5304        return 0;
5305out_overflow:
5306        print_overflow_msg(__func__, xdr);
5307        return -EIO;
5308}
5309
5310static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5311{
5312        int status;
5313
5314        status = decode_op_hdr(xdr, OP_REMOVE);
5315        if (status)
5316                goto out;
5317        status = decode_change_info(xdr, cinfo);
5318out:
5319        return status;
5320}
5321
5322static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5323              struct nfs4_change_info *new_cinfo)
5324{
5325        int status;
5326
5327        status = decode_op_hdr(xdr, OP_RENAME);
5328        if (status)
5329                goto out;
5330        if ((status = decode_change_info(xdr, old_cinfo)))
5331                goto out;
5332        status = decode_change_info(xdr, new_cinfo);
5333out:
5334        return status;
5335}
5336
5337static int decode_renew(struct xdr_stream *xdr)
5338{
5339        return decode_op_hdr(xdr, OP_RENEW);
5340}
5341
5342static int
5343decode_restorefh(struct xdr_stream *xdr)
5344{
5345        return decode_op_hdr(xdr, OP_RESTOREFH);
5346}
5347
5348static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5349                         struct nfs_getaclres *res)
5350{
5351        unsigned int savep;
5352        uint32_t attrlen,
5353                 bitmap[3] = {0};
5354        int status;
5355        unsigned int pg_offset;
5356
5357        res->acl_len = 0;
5358        if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5359                goto out;
5360
5361        xdr_enter_page(xdr, xdr->buf->page_len);
5362
5363        /* Calculate the offset of the page data */
5364        pg_offset = xdr->buf->head[0].iov_len;
5365
5366        if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5367                goto out;
5368        if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5369                goto out;
5370
5371        if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5372                return -EIO;
5373        if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5374
5375                /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5376                 * are stored with the acl data to handle the problem of
5377                 * variable length bitmaps.*/
5378                res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5379                res->acl_len = attrlen;
5380
5381                /* Check for receive buffer overflow */
5382                if (res->acl_len > (xdr->nwords << 2) ||
5383                    res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5384                        res->acl_flags |= NFS4_ACL_TRUNC;
5385                        dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5386                                        attrlen, xdr->nwords << 2);
5387                }
5388        } else
5389                status = -EOPNOTSUPP;
5390
5391out:
5392        return status;
5393}
5394
5395static int
5396decode_savefh(struct xdr_stream *xdr)
5397{
5398        return decode_op_hdr(xdr, OP_SAVEFH);
5399}
5400
5401static int decode_setattr(struct xdr_stream *xdr)
5402{
5403        __be32 *p;
5404        uint32_t bmlen;
5405        int status;
5406
5407        status = decode_op_hdr(xdr, OP_SETATTR);
5408        if (status)
5409                return status;
5410        p = xdr_inline_decode(xdr, 4);
5411        if (unlikely(!p))
5412                goto out_overflow;
5413        bmlen = be32_to_cpup(p);
5414        p = xdr_inline_decode(xdr, bmlen << 2);
5415        if (likely(p))
5416                return 0;
5417out_overflow:
5418        print_overflow_msg(__func__, xdr);
5419        return -EIO;
5420}
5421
5422static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5423{
5424        __be32 *p;
5425        uint32_t opnum;
5426        int32_t nfserr;
5427
5428        p = xdr_inline_decode(xdr, 8);
5429        if (unlikely(!p))
5430                goto out_overflow;
5431        opnum = be32_to_cpup(p++);
5432        if (opnum != OP_SETCLIENTID) {
5433                dprintk("nfs: decode_setclientid: Server returned operation"
5434                        " %d\n", opnum);
5435                return -EIO;
5436        }
5437        nfserr = be32_to_cpup(p);
5438        if (nfserr == NFS_OK) {
5439                p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5440                if (unlikely(!p))
5441                        goto out_overflow;
5442                p = xdr_decode_hyper(p, &res->clientid);
5443                memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5444        } else if (nfserr == NFSERR_CLID_INUSE) {
5445                uint32_t len;
5446
5447                /* skip netid string */
5448                p = xdr_inline_decode(xdr, 4);
5449                if (unlikely(!p))
5450                        goto out_overflow;
5451                len = be32_to_cpup(p);
5452                p = xdr_inline_decode(xdr, len);
5453                if (unlikely(!p))
5454                        goto out_overflow;
5455
5456                /* skip uaddr string */
5457                p = xdr_inline_decode(xdr, 4);
5458                if (unlikely(!p))
5459                        goto out_overflow;
5460                len = be32_to_cpup(p);
5461                p = xdr_inline_decode(xdr, len);
5462                if (unlikely(!p))
5463                        goto out_overflow;
5464                return -NFSERR_CLID_INUSE;
5465        } else
5466                return nfs4_stat_to_errno(nfserr);
5467
5468        return 0;
5469out_overflow:
5470        print_overflow_msg(__func__, xdr);
5471        return -EIO;
5472}
5473
5474static int decode_setclientid_confirm(struct xdr_stream *xdr)
5475{
5476        return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5477}
5478
5479static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5480{
5481        __be32 *p;
5482        int status;
5483
5484        status = decode_op_hdr(xdr, OP_WRITE);
5485        if (status)
5486                return status;
5487
5488        p = xdr_inline_decode(xdr, 8);
5489        if (unlikely(!p))
5490                goto out_overflow;
5491        res->count = be32_to_cpup(p++);
5492        res->verf->committed = be32_to_cpup(p++);
5493        return decode_write_verifier(xdr, &res->verf->verifier);
5494out_overflow:
5495        print_overflow_msg(__func__, xdr);
5496        return -EIO;
5497}
5498
5499static int decode_delegreturn(struct xdr_stream *xdr)
5500{
5501        return decode_op_hdr(xdr, OP_DELEGRETURN);
5502}
5503
5504static int decode_secinfo_gss(struct xdr_stream *xdr,
5505                              struct nfs4_secinfo4 *flavor)
5506{
5507        u32 oid_len;
5508        __be32 *p;
5509
5510        p = xdr_inline_decode(xdr, 4);
5511        if (unlikely(!p))
5512                goto out_overflow;
5513        oid_len = be32_to_cpup(p);
5514        if (oid_len > GSS_OID_MAX_LEN)
5515                goto out_err;
5516
5517        p = xdr_inline_decode(xdr, oid_len);
5518        if (unlikely(!p))
5519                goto out_overflow;
5520        memcpy(flavor->flavor_info.oid.data, p, oid_len);
5521        flavor->flavor_info.oid.len = oid_len;
5522
5523        p = xdr_inline_decode(xdr, 8);
5524        if (unlikely(!p))
5525                goto out_overflow;
5526        flavor->flavor_info.qop = be32_to_cpup(p++);
5527        flavor->flavor_info.service = be32_to_cpup(p);
5528
5529        return 0;
5530
5531out_overflow:
5532        print_overflow_msg(__func__, xdr);
5533        return -EIO;
5534out_err:
5535        return -EINVAL;
5536}
5537
5538static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5539{
5540        struct nfs4_secinfo4 *sec_flavor;
5541        unsigned int i, num_flavors;
5542        int status;
5543        __be32 *p;
5544
5545        p = xdr_inline_decode(xdr, 4);
5546        if (unlikely(!p))
5547                goto out_overflow;
5548
5549        res->flavors->num_flavors = 0;
5550        num_flavors = be32_to_cpup(p);
5551
5552        for (i = 0; i < num_flavors; i++) {
5553                sec_flavor = &res->flavors->flavors[i];
5554                if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5555                        break;
5556
5557                p = xdr_inline_decode(xdr, 4);
5558                if (unlikely(!p))
5559                        goto out_overflow;
5560                sec_flavor->flavor = be32_to_cpup(p);
5561
5562                if (sec_flavor->flavor == RPC_AUTH_GSS) {
5563                        status = decode_secinfo_gss(xdr, sec_flavor);
5564                        if (status)
5565                                goto out;
5566                }
5567                res->flavors->num_flavors++;
5568        }
5569
5570        status = 0;
5571out:
5572        return status;
5573out_overflow:
5574        print_overflow_msg(__func__, xdr);
5575        return -EIO;
5576}
5577
5578static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5579{
5580        int status = decode_op_hdr(xdr, OP_SECINFO);
5581        if (status)
5582                return status;
5583        return decode_secinfo_common(xdr, res);
5584}
5585
5586#if defined(CONFIG_NFS_V4_1)
5587static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5588{
5589        int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5590        if (status)
5591                return status;
5592        return decode_secinfo_common(xdr, res);
5593}
5594
5595static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5596{
5597        __be32 *p;
5598        uint32_t bitmap_words;
5599        unsigned int i;
5600
5601        p = xdr_inline_decode(xdr, 4);
5602        bitmap_words = be32_to_cpup(p++);
5603        if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5604                return -EIO;
5605        p = xdr_inline_decode(xdr, 4 * bitmap_words);
5606        for (i = 0; i < bitmap_words; i++)
5607                op_map->u.words[i] = be32_to_cpup(p++);
5608
5609        return 0;
5610}
5611
5612static int decode_exchange_id(struct xdr_stream *xdr,
5613                              struct nfs41_exchange_id_res *res)
5614{
5615        __be32 *p;
5616        uint32_t dummy;
5617        char *dummy_str;
5618        int status;
5619        uint32_t impl_id_count;
5620
5621        status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5622        if (status)
5623                return status;
5624
5625        p = xdr_inline_decode(xdr, 8);
5626        if (unlikely(!p))
5627                goto out_overflow;
5628        xdr_decode_hyper(p, &res->clientid);
5629        p = xdr_inline_decode(xdr, 12);
5630        if (unlikely(!p))
5631                goto out_overflow;
5632        res->seqid = be32_to_cpup(p++);
5633        res->flags = be32_to_cpup(p++);
5634
5635        res->state_protect.how = be32_to_cpup(p);
5636        switch (res->state_protect.how) {
5637        case SP4_NONE:
5638                break;
5639        case SP4_MACH_CRED:
5640                status = decode_op_map(xdr, &res->state_protect.enforce);
5641                if (status)
5642                        return status;
5643                status = decode_op_map(xdr, &res->state_protect.allow);
5644                if (status)
5645                        return status;
5646                break;
5647        default:
5648                WARN_ON_ONCE(1);
5649                return -EIO;
5650        }
5651
5652        /* server_owner4.so_minor_id */
5653        p = xdr_inline_decode(xdr, 8);
5654        if (unlikely(!p))
5655                goto out_overflow;
5656        p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5657
5658        /* server_owner4.so_major_id */
5659        status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5660        if (unlikely(status))
5661                return status;
5662        if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5663                return -EIO;
5664        memcpy(res->server_owner->major_id, dummy_str, dummy);
5665        res->server_owner->major_id_sz = dummy;
5666
5667        /* server_scope4 */
5668        status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5669        if (unlikely(status))
5670                return status;
5671        if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5672                return -EIO;
5673        memcpy(res->server_scope->server_scope, dummy_str, dummy);
5674        res->server_scope->server_scope_sz = dummy;
5675
5676        /* Implementation Id */
5677        p = xdr_inline_decode(xdr, 4);
5678        if (unlikely(!p))
5679                goto out_overflow;
5680        impl_id_count = be32_to_cpup(p++);
5681
5682        if (impl_id_count) {
5683                /* nii_domain */
5684                status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5685                if (unlikely(status))
5686                        return status;
5687                if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5688                        return -EIO;
5689                memcpy(res->impl_id->domain, dummy_str, dummy);
5690
5691                /* nii_name */
5692                status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5693                if (unlikely(status))
5694                        return status;
5695                if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5696                        return -EIO;
5697                memcpy(res->impl_id->name, dummy_str, dummy);
5698
5699                /* nii_date */
5700                p = xdr_inline_decode(xdr, 12);
5701                if (unlikely(!p))
5702                        goto out_overflow;
5703                p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5704                res->impl_id->date.nseconds = be32_to_cpup(p);
5705
5706                /* if there's more than one entry, ignore the rest */
5707        }
5708        return 0;
5709out_overflow:
5710        print_overflow_msg(__func__, xdr);
5711        return -EIO;
5712}
5713
5714static int decode_chan_attrs(struct xdr_stream *xdr,
5715                             struct nfs4_channel_attrs *attrs)
5716{
5717        __be32 *p;
5718        u32 nr_attrs, val;
5719
5720        p = xdr_inline_decode(xdr, 28);
5721        if (unlikely(!p))
5722                goto out_overflow;
5723        val = be32_to_cpup(p++);        /* headerpadsz */
5724        if (val)
5725                return -EINVAL;         /* no support for header padding yet */
5726        attrs->max_rqst_sz = be32_to_cpup(p++);
5727        attrs->max_resp_sz = be32_to_cpup(p++);
5728        attrs->max_resp_sz_cached = be32_to_cpup(p++);
5729        attrs->max_ops = be32_to_cpup(p++);
5730        attrs->max_reqs = be32_to_cpup(p++);
5731        nr_attrs = be32_to_cpup(p);
5732        if (unlikely(nr_attrs > 1)) {
5733                printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5734                        "count %u\n", __func__, nr_attrs);
5735                return -EINVAL;
5736        }
5737        if (nr_attrs == 1) {
5738                p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5739                if (unlikely(!p))
5740                        goto out_overflow;
5741        }
5742        return 0;
5743out_overflow:
5744        print_overflow_msg(__func__, xdr);
5745        return -EIO;
5746}
5747
5748static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5749{
5750        return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5751}
5752
5753static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5754                                struct nfs41_bind_conn_to_session_res *res)
5755{
5756        __be32 *p;
5757        int status;
5758
5759        status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5760        if (!status)
5761                status = decode_sessionid(xdr, &res->sessionid);
5762        if (unlikely(status))
5763                return status;
5764
5765        /* dir flags, rdma mode bool */
5766        p = xdr_inline_decode(xdr, 8);
5767        if (unlikely(!p))
5768                goto out_overflow;
5769
5770        res->dir = be32_to_cpup(p++);
5771        if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5772                return -EIO;
5773        if (be32_to_cpup(p) == 0)
5774                res->use_conn_in_rdma_mode = false;
5775        else
5776                res->use_conn_in_rdma_mode = true;
5777
5778        return 0;
5779out_overflow:
5780        print_overflow_msg(__func__, xdr);
5781        return -EIO;
5782}
5783
5784static int decode_create_session(struct xdr_stream *xdr,
5785                                 struct nfs41_create_session_res *res)
5786{
5787        __be32 *p;
5788        int status;
5789
5790        status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5791        if (!status)
5792                status = decode_sessionid(xdr, &res->sessionid);
5793        if (unlikely(status))
5794                return status;
5795
5796        /* seqid, flags */
5797        p = xdr_inline_decode(xdr, 8);
5798        if (unlikely(!p))
5799                goto out_overflow;
5800        res->seqid = be32_to_cpup(p++);
5801        res->flags = be32_to_cpup(p);
5802
5803        /* Channel attributes */
5804        status = decode_chan_attrs(xdr, &res->fc_attrs);
5805        if (!status)
5806                status = decode_chan_attrs(xdr, &res->bc_attrs);
5807        return status;
5808out_overflow:
5809        print_overflow_msg(__func__, xdr);
5810        return -EIO;
5811}
5812
5813static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5814{
5815        return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5816}
5817
5818static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5819{
5820        return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5821}
5822
5823static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5824{
5825        return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5826}
5827#endif /* CONFIG_NFS_V4_1 */
5828
5829static int decode_sequence(struct xdr_stream *xdr,
5830                           struct nfs4_sequence_res *res,
5831                           struct rpc_rqst *rqstp)
5832{
5833#if defined(CONFIG_NFS_V4_1)
5834        struct nfs4_session *session;
5835        struct nfs4_sessionid id;
5836        u32 dummy;
5837        int status;
5838        __be32 *p;
5839
5840        if (res->sr_slot == NULL)
5841                return 0;
5842        if (!res->sr_slot->table->session)
5843                return 0;
5844
5845        status = decode_op_hdr(xdr, OP_SEQUENCE);
5846        if (!status)
5847                status = decode_sessionid(xdr, &id);
5848        if (unlikely(status))
5849                goto out_err;
5850
5851        /*
5852         * If the server returns different values for sessionID, slotID or
5853         * sequence number, the server is looney tunes.
5854         */
5855        status = -EREMOTEIO;
5856        session = res->sr_slot->table->session;
5857
5858        if (memcmp(id.data, session->sess_id.data,
5859                   NFS4_MAX_SESSIONID_LEN)) {
5860                dprintk("%s Invalid session id\n", __func__);
5861                goto out_err;
5862        }
5863
5864        p = xdr_inline_decode(xdr, 20);
5865        if (unlikely(!p))
5866                goto out_overflow;
5867
5868        /* seqid */
5869        dummy = be32_to_cpup(p++);
5870        if (dummy != res->sr_slot->seq_nr) {
5871                dprintk("%s Invalid sequence number\n", __func__);
5872                goto out_err;
5873        }
5874        /* slot id */
5875        dummy = be32_to_cpup(p++);
5876        if (dummy != res->sr_slot->slot_nr) {
5877                dprintk("%s Invalid slot id\n", __func__);
5878                goto out_err;
5879        }
5880        /* highest slot id */
5881        res->sr_highest_slotid = be32_to_cpup(p++);
5882        /* target highest slot id */
5883        res->sr_target_highest_slotid = be32_to_cpup(p++);
5884        /* result flags */
5885        res->sr_status_flags = be32_to_cpup(p);
5886        status = 0;
5887out_err:
5888        res->sr_status = status;
5889        return status;
5890out_overflow:
5891        print_overflow_msg(__func__, xdr);
5892        status = -EIO;
5893        goto out_err;
5894#else  /* CONFIG_NFS_V4_1 */
5895        return 0;
5896#endif /* CONFIG_NFS_V4_1 */
5897}
5898
5899#if defined(CONFIG_NFS_V4_1)
5900static int decode_layout_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
5901{
5902        stateid->type = NFS4_LAYOUT_STATEID_TYPE;
5903        return decode_stateid(xdr, stateid);
5904}
5905
5906static int decode_getdeviceinfo(struct xdr_stream *xdr,
5907                                struct nfs4_getdeviceinfo_res *res)
5908{
5909        struct pnfs_device *pdev = res->pdev;
5910        __be32 *p;
5911        uint32_t len, type;
5912        int status;
5913
5914        status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5915        if (status) {
5916                if (status == -ETOOSMALL) {
5917                        p = xdr_inline_decode(xdr, 4);
5918                        if (unlikely(!p))
5919                                goto out_overflow;
5920                        pdev->mincount = be32_to_cpup(p);
5921                        dprintk("%s: Min count too small. mincnt = %u\n",
5922                                __func__, pdev->mincount);
5923                }
5924                return status;
5925        }
5926
5927        p = xdr_inline_decode(xdr, 8);
5928        if (unlikely(!p))
5929                goto out_overflow;
5930        type = be32_to_cpup(p++);
5931        if (type != pdev->layout_type) {
5932                dprintk("%s: layout mismatch req: %u pdev: %u\n",
5933                        __func__, pdev->layout_type, type);
5934                return -EINVAL;
5935        }
5936        /*
5937         * Get the length of the opaque device_addr4. xdr_read_pages places
5938         * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5939         * and places the remaining xdr data in xdr_buf->tail
5940         */
5941        pdev->mincount = be32_to_cpup(p);
5942        if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5943                goto out_overflow;
5944
5945        /* Parse notification bitmap, verifying that it is zero. */
5946        p = xdr_inline_decode(xdr, 4);
5947        if (unlikely(!p))
5948                goto out_overflow;
5949        len = be32_to_cpup(p);
5950        if (len) {
5951                uint32_t i;
5952
5953                p = xdr_inline_decode(xdr, 4 * len);
5954                if (unlikely(!p))
5955                        goto out_overflow;
5956
5957                res->notification = be32_to_cpup(p++);
5958                for (i = 1; i < len; i++) {
5959                        if (be32_to_cpup(p++)) {
5960                                dprintk("%s: unsupported notification\n",
5961                                        __func__);
5962                                return -EIO;
5963                        }
5964                }
5965        }
5966        return 0;
5967out_overflow:
5968        print_overflow_msg(__func__, xdr);
5969        return -EIO;
5970}
5971
5972static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5973                            struct nfs4_layoutget_res *res)
5974{
5975        __be32 *p;
5976        int status;
5977        u32 layout_count;
5978        u32 recvd;
5979
5980        status = decode_op_hdr(xdr, OP_LAYOUTGET);
5981        if (status)
5982                return status;
5983        p = xdr_inline_decode(xdr, 4);
5984        if (unlikely(!p))
5985                goto out_overflow;
5986        res->return_on_close = be32_to_cpup(p);
5987        decode_layout_stateid(xdr, &res->stateid);
5988        p = xdr_inline_decode(xdr, 4);
5989        if (unlikely(!p))
5990                goto out_overflow;
5991        layout_count = be32_to_cpup(p);
5992        if (!layout_count) {
5993                dprintk("%s: server responded with empty layout array\n",
5994                        __func__);
5995                return -EINVAL;
5996        }
5997
5998        p = xdr_inline_decode(xdr, 28);
5999        if (unlikely(!p))
6000                goto out_overflow;

6001        p = xdr_decode_hyper(p, &res->range.offset);
6002        p = xdr_decode_hyper(p, &res->range.length);
6003        res->range.iomode = be32_to_cpup(p++);
6004        res->type = be32_to_cpup(p++);
6005        res->layoutp->len = be32_to_cpup(p);
6006
6007        dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
6008                __func__,
6009                (unsigned long)res->range.offset,
6010                (unsigned long)res->range.length,
6011                res->range.iomode,
6012                res->type,
6013                res->layoutp->len);
6014
6015        recvd = xdr_read_pages(xdr, res->layoutp->len);
6016        if (res->layoutp->len > recvd) {
6017                dprintk("NFS: server cheating in layoutget reply: "
6018                                "layout len %u > recvd %u\n",
6019                                res->layoutp->len, recvd);
6020                return -EINVAL;
6021        }
6022
6023        if (layout_count > 1) {
6024                /* We only handle a length one array at the moment.  Any
6025                 * further entries are just ignored.  Note that this means
6026                 * the client may see a response that is less than the
6027                 * minimum it requested.
6028                 */
6029                dprintk("%s: server responded with %d layouts, dropping tail\n",
6030                        __func__, layout_count);
6031        }
6032
6033        return 0;
6034out_overflow:
6035        print_overflow_msg(__func__, xdr);
6036        return -EIO;
6037}
6038
6039static int decode_layoutreturn(struct xdr_stream *xdr,
6040                               struct nfs4_layoutreturn_res *res)
6041{
6042        __be32 *p;
6043        int status;
6044
6045        status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
6046        if (status)
6047                return status;
6048        p = xdr_inline_decode(xdr, 4);
6049        if (unlikely(!p))
6050                goto out_overflow;
6051        res->lrs_present = be32_to_cpup(p);
6052        if (res->lrs_present)
6053                status = decode_layout_stateid(xdr, &res->stateid);
6054        return status;
6055out_overflow:
6056        print_overflow_msg(__func__, xdr);
6057        return -EIO;
6058}
6059
6060static int decode_layoutcommit(struct xdr_stream *xdr,
6061                               struct rpc_rqst *req,
6062                               struct nfs4_layoutcommit_res *res)
6063{
6064        __be32 *p;
6065        __u32 sizechanged;
6066        int status;
6067
6068        status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
6069        res->status = status;
6070        if (status)
6071                return status;
6072
6073        p = xdr_inline_decode(xdr, 4);
6074        if (unlikely(!p))
6075                goto out_overflow;
6076        sizechanged = be32_to_cpup(p);
6077
6078        if (sizechanged) {
6079                /* throw away new size */
6080                p = xdr_inline_decode(xdr, 8);
6081                if (unlikely(!p))
6082                        goto out_overflow;
6083        }
6084        return 0;
6085out_overflow:
6086        print_overflow_msg(__func__, xdr);
6087        return -EIO;
6088}
6089
6090static int decode_test_stateid(struct xdr_stream *xdr,
6091                               struct nfs41_test_stateid_res *res)
6092{
6093        __be32 *p;
6094        int status;
6095        int num_res;
6096
6097        status = decode_op_hdr(xdr, OP_TEST_STATEID);
6098        if (status)
6099                return status;
6100
6101        p = xdr_inline_decode(xdr, 4);
6102        if (unlikely(!p))
6103                goto out_overflow;
6104        num_res = be32_to_cpup(p++);
6105        if (num_res != 1)
6106                goto out;
6107
6108        p = xdr_inline_decode(xdr, 4);
6109        if (unlikely(!p))
6110                goto out_overflow;
6111        res->status = be32_to_cpup(p++);
6112
6113        return status;
6114out_overflow:
6115        print_overflow_msg(__func__, xdr);
6116out:
6117        return -EIO;
6118}
6119
6120static int decode_free_stateid(struct xdr_stream *xdr,
6121                               struct nfs41_free_stateid_res *res)
6122{
6123        res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
6124        return res->status;
6125}
6126#else
6127static inline
6128int decode_layoutreturn(struct xdr_stream *xdr,
6129                               struct nfs4_layoutreturn_res *res)
6130{
6131        return 0;
6132}
6133#endif /* CONFIG_NFS_V4_1 */
6134
6135/*
6136 * END OF "GENERIC" DECODE ROUTINES.
6137 */
6138
6139/*
6140 * Decode OPEN_DOWNGRADE response
6141 */
6142static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
6143                                       struct xdr_stream *xdr,
6144                                       struct nfs_closeres *res)
6145{
6146        struct compound_hdr hdr;
6147        int status;
6148
6149        status = decode_compound_hdr(xdr, &hdr);
6150        if (status)
6151                goto out;
6152        status = decode_sequence(xdr, &res->seq_res, rqstp);
6153        if (status)
6154                goto out;
6155        status = decode_putfh(xdr);
6156        if (status)
6157                goto out;
6158        if (res->lr_res) {
6159                status = decode_layoutreturn(xdr, res->lr_res);
6160                res->lr_ret = status;
6161                if (status)
6162                        goto out;
6163        }
6164        status = decode_open_downgrade(xdr, res);
6165out:
6166        return status;
6167}
6168
6169/*
6170 * Decode ACCESS response
6171 */
6172static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6173                               struct nfs4_accessres *res)
6174{
6175        struct compound_hdr hdr;
6176        int status;
6177
6178        status = decode_compound_hdr(xdr, &hdr);
6179        if (status)
6180                goto out;
6181        status = decode_sequence(xdr, &res->seq_res, rqstp);
6182        if (status)
6183                goto out;
6184        status = decode_putfh(xdr);
6185        if (status != 0)
6186                goto out;
6187        status = decode_access(xdr, &res->supported, &res->access);
6188        if (status != 0)
6189                goto out;
6190        decode_getfattr(xdr, res->fattr, res->server);
6191out:
6192        return status;
6193}
6194
6195/*
6196 * Decode LOOKUP response
6197 */
6198static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6199                               struct nfs4_lookup_res *res)
6200{
6201        struct compound_hdr hdr;
6202        int status;
6203
6204        status = decode_compound_hdr(xdr, &hdr);
6205        if (status)
6206                goto out;
6207        status = decode_sequence(xdr, &res->seq_res, rqstp);
6208        if (status)
6209                goto out;
6210        status = decode_putfh(xdr);
6211        if (status)
6212                goto out;
6213        status = decode_lookup(xdr);
6214        if (status)
6215                goto out;
6216        status = decode_getfh(xdr, res->fh);
6217        if (status)
6218                goto out;
6219        status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6220out:
6221        return status;
6222}
6223
6224/*
6225 * Decode LOOKUP_ROOT response
6226 */
6227static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6228                                    struct xdr_stream *xdr,
6229                                    struct nfs4_lookup_res *res)
6230{
6231        struct compound_hdr hdr;
6232        int status;
6233
6234        status = decode_compound_hdr(xdr, &hdr);
6235        if (status)
6236                goto out;
6237        status = decode_sequence(xdr, &res->seq_res, rqstp);
6238        if (status)
6239                goto out;
6240        status = decode_putrootfh(xdr);
6241        if (status)
6242                goto out;
6243        status = decode_getfh(xdr, res->fh);
6244        if (status == 0)
6245                status = decode_getfattr_label(xdr, res->fattr,
6246                                                res->label, res->server);
6247out:
6248        return status;
6249}
6250
6251/*
6252 * Decode REMOVE response
6253 */
6254static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6255                               struct nfs_removeres *res)
6256{
6257        struct compound_hdr hdr;
6258        int status;
6259
6260        status = decode_compound_hdr(xdr, &hdr);
6261        if (status)
6262                goto out;
6263        status = decode_sequence(xdr, &res->seq_res, rqstp);
6264        if (status)
6265                goto out;
6266        status = decode_putfh(xdr);
6267        if (status)
6268                goto out;
6269        status = decode_remove(xdr, &res->cinfo);
6270out:
6271        return status;
6272}
6273
6274/*
6275 * Decode RENAME response
6276 */
6277static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6278                               struct nfs_renameres *res)
6279{
6280        struct compound_hdr hdr;
6281        int status;
6282
6283        status = decode_compound_hdr(xdr, &hdr);
6284        if (status)
6285                goto out;
6286        status = decode_sequence(xdr, &res->seq_res, rqstp);
6287        if (status)
6288                goto out;
6289        status = decode_putfh(xdr);
6290        if (status)
6291                goto out;
6292        status = decode_savefh(xdr);
6293        if (status)
6294                goto out;
6295        status = decode_putfh(xdr);
6296        if (status)
6297                goto out;
6298        status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6299out:
6300        return status;
6301}
6302
6303/*
6304 * Decode LINK response
6305 */
6306static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6307                             struct nfs4_link_res *res)
6308{
6309        struct compound_hdr hdr;
6310        int status;
6311
6312        status = decode_compound_hdr(xdr, &hdr);
6313        if (status)
6314                goto out;
6315        status = decode_sequence(xdr, &res->seq_res, rqstp);
6316        if (status)
6317                goto out;
6318        status = decode_putfh(xdr);
6319        if (status)
6320                goto out;
6321        status = decode_savefh(xdr);
6322        if (status)
6323                goto out;
6324        status = decode_putfh(xdr);
6325        if (status)
6326                goto out;
6327        status = decode_link(xdr, &res->cinfo);
6328        if (status)
6329                goto out;
6330        /*
6331         * Note order: OP_LINK leaves the directory as the current
6332         *             filehandle.
6333         */
6334        status = decode_restorefh(xdr);
6335        if (status)
6336                goto out;
6337        decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6338out:
6339        return status;
6340}
6341
6342/*
6343 * Decode CREATE response
6344 */
6345static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6346                               struct nfs4_create_res *res)
6347{
6348        struct compound_hdr hdr;
6349        int status;
6350
6351        status = decode_compound_hdr(xdr, &hdr);
6352        if (status)
6353                goto out;
6354        status = decode_sequence(xdr, &res->seq_res, rqstp);
6355        if (status)
6356                goto out;
6357        status = decode_putfh(xdr);
6358        if (status)
6359                goto out;
6360        status = decode_create(xdr, &res->dir_cinfo);
6361        if (status)
6362                goto out;
6363        status = decode_getfh(xdr, res->fh);
6364        if (status)
6365                goto out;
6366        decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6367out:
6368        return status;
6369}
6370
6371/*
6372 * Decode SYMLINK response
6373 */
6374static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6375                                struct nfs4_create_res *res)
6376{
6377        return nfs4_xdr_dec_create(rqstp, xdr, res);
6378}
6379
6380/*
6381 * Decode GETATTR response
6382 */
6383static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6384                                struct nfs4_getattr_res *res)
6385{
6386        struct compound_hdr hdr;
6387        int status;
6388
6389        status = decode_compound_hdr(xdr, &hdr);
6390        if (status)
6391                goto out;
6392        status = decode_sequence(xdr, &res->seq_res, rqstp);
6393        if (status)
6394                goto out;
6395        status = decode_putfh(xdr);
6396        if (status)
6397                goto out;
6398        status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6399out:
6400        return status;
6401}
6402
6403/*
6404 * Encode an SETACL request
6405 */
6406static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6407                                struct nfs_setaclargs *args)
6408{
6409        struct compound_hdr hdr = {
6410                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6411        };
6412
6413        encode_compound_hdr(xdr, req, &hdr);
6414        encode_sequence(xdr, &args->seq_args, &hdr);
6415        encode_putfh(xdr, args->fh, &hdr);
6416        encode_setacl(xdr, args, &hdr);
6417        encode_nops(&hdr);
6418}
6419
6420/*
6421 * Decode SETACL response
6422 */
6423static int
6424nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6425                    struct nfs_setaclres *res)
6426{
6427        struct compound_hdr hdr;
6428        int status;
6429
6430        status = decode_compound_hdr(xdr, &hdr);
6431        if (status)
6432                goto out;
6433        status = decode_sequence(xdr, &res->seq_res, rqstp);
6434        if (status)
6435                goto out;
6436        status = decode_putfh(xdr);
6437        if (status)
6438                goto out;
6439        status = decode_setattr(xdr);
6440out:
6441        return status;
6442}
6443
6444/*
6445 * Decode GETACL response
6446 */
6447static int
6448nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6449                    struct nfs_getaclres *res)
6450{
6451        struct compound_hdr hdr;
6452        int status;
6453
6454        if (res->acl_scratch != NULL) {
6455                void *p = page_address(res->acl_scratch);
6456                xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
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_getacl(xdr, rqstp, res);
6468
6469out:
6470        return status;
6471}
6472
6473/*
6474 * Decode CLOSE response
6475 */
6476static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6477                              struct nfs_closeres *res)
6478{
6479        struct compound_hdr hdr;
6480        int status;
6481
6482        status = decode_compound_hdr(xdr, &hdr);
6483        if (status)
6484                goto out;
6485        status = decode_sequence(xdr, &res->seq_res, rqstp);
6486        if (status)
6487                goto out;
6488        status = decode_putfh(xdr);
6489        if (status)
6490                goto out;
6491        if (res->lr_res) {
6492                status = decode_layoutreturn(xdr, res->lr_res);
6493                res->lr_ret = status;
6494                if (status)
6495                        goto out;
6496        }
6497        status = decode_close(xdr, res);
6498        if (status != 0)
6499                goto out;
6500        /*
6501         * Note: Server may do delete on close for this file
6502         *      in which case the getattr call will fail with
6503         *      an ESTALE error. Shouldn't be a problem,
6504         *      though, since fattr->valid will remain unset.
6505         */
6506        decode_getfattr(xdr, res->fattr, res->server);
6507out:
6508        return status;
6509}
6510
6511/*
6512 * Decode OPEN response
6513 */
6514static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6515                             struct nfs_openres *res)
6516{
6517        struct compound_hdr hdr;
6518        int status;
6519
6520        status = decode_compound_hdr(xdr, &hdr);
6521        if (status)
6522                goto out;
6523        status = decode_sequence(xdr, &res->seq_res, rqstp);
6524        if (status)
6525                goto out;
6526        status = decode_putfh(xdr);
6527        if (status)
6528                goto out;
6529        status = decode_open(xdr, res);
6530        if (status)
6531                goto out;
6532        status = decode_getfh(xdr, &res->fh);
6533        if (status)
6534                goto out;
6535        if (res->access_request)
6536                decode_access(xdr, &res->access_supported, &res->access_result);
6537        decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6538out:
6539        return status;
6540}
6541
6542/*
6543 * Decode OPEN_CONFIRM response
6544 */
6545static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6546                                     struct xdr_stream *xdr,
6547                                     struct nfs_open_confirmres *res)
6548{
6549        struct compound_hdr hdr;
6550        int status;
6551
6552        status = decode_compound_hdr(xdr, &hdr);
6553        if (status)
6554                goto out;
6555        status = decode_putfh(xdr);
6556        if (status)
6557                goto out;
6558        status = decode_open_confirm(xdr, res);
6559out:
6560        return status;
6561}
6562
6563/*
6564 * Decode OPEN response
6565 */
6566static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6567                                    struct xdr_stream *xdr,
6568                                    struct nfs_openres *res)
6569{
6570        struct compound_hdr hdr;
6571        int status;
6572
6573        status = decode_compound_hdr(xdr, &hdr);
6574        if (status)
6575                goto out;
6576        status = decode_sequence(xdr, &res->seq_res, rqstp);
6577        if (status)
6578                goto out;
6579        status = decode_putfh(xdr);
6580        if (status)
6581                goto out;
6582        status = decode_open(xdr, res);
6583        if (status)
6584                goto out;
6585        if (res->access_request)
6586                decode_access(xdr, &res->access_supported, &res->access_result);
6587        decode_getfattr(xdr, res->f_attr, res->server);
6588out:
6589        return status;
6590}
6591
6592/*
6593 * Decode SETATTR response
6594 */
6595static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6596                                struct xdr_stream *xdr,
6597                                struct nfs_setattrres *res)
6598{
6599        struct compound_hdr hdr;
6600        int status;
6601
6602        status = decode_compound_hdr(xdr, &hdr);
6603        if (status)
6604                goto out;
6605        status = decode_sequence(xdr, &res->seq_res, rqstp);
6606        if (status)
6607                goto out;
6608        status = decode_putfh(xdr);
6609        if (status)
6610                goto out;
6611        status = decode_setattr(xdr);
6612        if (status)
6613                goto out;
6614        decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6615out:
6616        return status;
6617}
6618
6619/*
6620 * Decode LOCK response
6621 */
6622static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6623                             struct nfs_lock_res *res)
6624{
6625        struct compound_hdr hdr;
6626        int status;
6627
6628        status = decode_compound_hdr(xdr, &hdr);
6629        if (status)
6630                goto out;
6631        status = decode_sequence(xdr, &res->seq_res, rqstp);
6632        if (status)
6633                goto out;
6634        status = decode_putfh(xdr);
6635        if (status)
6636                goto out;
6637        status = decode_lock(xdr, res);
6638out:
6639        return status;
6640}
6641
6642/*
6643 * Decode LOCKT response
6644 */
6645static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6646                              struct nfs_lockt_res *res)
6647{
6648        struct compound_hdr hdr;
6649        int status;
6650
6651        status = decode_compound_hdr(xdr, &hdr);
6652        if (status)
6653                goto out;
6654        status = decode_sequence(xdr, &res->seq_res, rqstp);
6655        if (status)
6656                goto out;
6657        status = decode_putfh(xdr);
6658        if (status)
6659                goto out;
6660        status = decode_lockt(xdr, res);
6661out:
6662        return status;
6663}
6664
6665/*
6666 * Decode LOCKU response
6667 */
6668static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6669                              struct nfs_locku_res *res)
6670{
6671        struct compound_hdr hdr;
6672        int status;
6673
6674        status = decode_compound_hdr(xdr, &hdr);
6675        if (status)
6676                goto out;
6677        status = decode_sequence(xdr, &res->seq_res, rqstp);
6678        if (status)
6679                goto out;
6680        status = decode_putfh(xdr);
6681        if (status)
6682                goto out;
6683        status = decode_locku(xdr, res);
6684out:
6685        return status;
6686}
6687
6688static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6689                                          struct xdr_stream *xdr, void *dummy)
6690{
6691        struct compound_hdr hdr;
6692        int status;
6693
6694        status = decode_compound_hdr(xdr, &hdr);
6695        if (!status)
6696                status = decode_release_lockowner(xdr);
6697        return status;
6698}
6699
6700/*
6701 * Decode READLINK response
6702 */
6703static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6704                                 struct xdr_stream *xdr,
6705                                 struct nfs4_readlink_res *res)
6706{
6707        struct compound_hdr hdr;
6708        int status;
6709
6710        status = decode_compound_hdr(xdr, &hdr);
6711        if (status)
6712                goto out;
6713        status = decode_sequence(xdr, &res->seq_res, rqstp);
6714        if (status)
6715                goto out;
6716        status = decode_putfh(xdr);
6717        if (status)
6718                goto out;
6719        status = decode_readlink(xdr, rqstp);
6720out:
6721        return status;
6722}
6723
6724/*
6725 * Decode READDIR response
6726 */
6727static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6728                                struct nfs4_readdir_res *res)
6729{
6730        struct compound_hdr hdr;
6731        int status;
6732
6733        status = decode_compound_hdr(xdr, &hdr);
6734        if (status)
6735                goto out;
6736        status = decode_sequence(xdr, &res->seq_res, rqstp);
6737        if (status)
6738                goto out;
6739        status = decode_putfh(xdr);
6740        if (status)
6741                goto out;
6742        status = decode_readdir(xdr, rqstp, res);
6743out:
6744        return status;
6745}
6746
6747/*
6748 * Decode Read response
6749 */
6750static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6751                             struct nfs_pgio_res *res)
6752{
6753        struct compound_hdr hdr;
6754        int status;
6755
6756        status = decode_compound_hdr(xdr, &hdr);
6757        res->op_status = hdr.status;
6758        if (status)
6759                goto out;
6760        status = decode_sequence(xdr, &res->seq_res, rqstp);
6761        if (status)
6762                goto out;
6763        status = decode_putfh(xdr);
6764        if (status)
6765                goto out;
6766        status = decode_read(xdr, rqstp, res);
6767        if (!status)
6768                status = res->count;
6769out:
6770        return status;
6771}
6772
6773/*
6774 * Decode WRITE response
6775 */
6776static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6777                              struct nfs_pgio_res *res)
6778{
6779        struct compound_hdr hdr;
6780        int status;
6781
6782        status = decode_compound_hdr(xdr, &hdr);
6783        res->op_status = hdr.status;
6784        if (status)
6785                goto out;
6786        status = decode_sequence(xdr, &res->seq_res, rqstp);
6787        if (status)
6788                goto out;
6789        status = decode_putfh(xdr);
6790        if (status)
6791                goto out;
6792        status = decode_write(xdr, res);
6793        if (status)
6794                goto out;
6795        if (res->fattr)
6796                decode_getfattr(xdr, res->fattr, res->server);
6797        if (!status)
6798                status = res->count;
6799out:
6800        return status;
6801}
6802
6803/*
6804 * Decode COMMIT response
6805 */
6806static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6807                               struct nfs_commitres *res)
6808{
6809        struct compound_hdr hdr;
6810        int status;
6811
6812        status = decode_compound_hdr(xdr, &hdr);
6813        res->op_status = hdr.status;
6814        if (status)
6815                goto out;
6816        status = decode_sequence(xdr, &res->seq_res, rqstp);
6817        if (status)
6818                goto out;
6819        status = decode_putfh(xdr);
6820        if (status)
6821                goto out;
6822        status = decode_commit(xdr, res);
6823out:
6824        return status;
6825}
6826
6827/*
6828 * Decode FSINFO response
6829 */
6830static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6831                               struct nfs4_fsinfo_res *res)
6832{
6833        struct compound_hdr hdr;
6834        int status;
6835
6836        status = decode_compound_hdr(xdr, &hdr);
6837        if (!status)
6838                status = decode_sequence(xdr, &res->seq_res, req);
6839        if (!status)
6840                status = decode_putfh(xdr);
6841        if (!status)
6842                status = decode_fsinfo(xdr, res->fsinfo);
6843        return status;
6844}
6845
6846/*
6847 * Decode PATHCONF response
6848 */
6849static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6850                                 struct nfs4_pathconf_res *res)
6851{
6852        struct compound_hdr hdr;
6853        int status;
6854
6855        status = decode_compound_hdr(xdr, &hdr);
6856        if (!status)
6857                status = decode_sequence(xdr, &res->seq_res, req);
6858        if (!status)
6859                status = decode_putfh(xdr);
6860        if (!status)
6861                status = decode_pathconf(xdr, res->pathconf);
6862        return status;
6863}
6864
6865/*
6866 * Decode STATFS response
6867 */
6868static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6869                               struct nfs4_statfs_res *res)
6870{
6871        struct compound_hdr hdr;
6872        int status;
6873
6874        status = decode_compound_hdr(xdr, &hdr);
6875        if (!status)
6876                status = decode_sequence(xdr, &res->seq_res, req);
6877        if (!status)
6878                status = decode_putfh(xdr);
6879        if (!status)
6880                status = decode_statfs(xdr, res->fsstat);
6881        return status;
6882}
6883
6884/*
6885 * Decode GETATTR_BITMAP response
6886 */
6887static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6888                                    struct xdr_stream *xdr,
6889                                    struct nfs4_server_caps_res *res)
6890{
6891        struct compound_hdr hdr;
6892        int status;
6893
6894        status = decode_compound_hdr(xdr, &hdr);
6895        if (status)
6896                goto out;
6897        status = decode_sequence(xdr, &res->seq_res, req);
6898        if (status)
6899                goto out;
6900        status = decode_putfh(xdr);
6901        if (status)
6902                goto out;
6903        status = decode_server_caps(xdr, res);
6904out:
6905        return status;
6906}
6907
6908/*
6909 * Decode RENEW response
6910 */
6911static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6912                              void *__unused)
6913{
6914        struct compound_hdr hdr;
6915        int status;
6916
6917        status = decode_compound_hdr(xdr, &hdr);
6918        if (!status)
6919                status = decode_renew(xdr);
6920        return status;
6921}
6922
6923/*
6924 * Decode SETCLIENTID response
6925 */
6926static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6927                                    struct xdr_stream *xdr,
6928                                    struct nfs4_setclientid_res *res)
6929{
6930        struct compound_hdr hdr;
6931        int status;
6932
6933        status = decode_compound_hdr(xdr, &hdr);
6934        if (!status)
6935                status = decode_setclientid(xdr, res);
6936        return status;
6937}
6938
6939/*
6940 * Decode SETCLIENTID_CONFIRM response
6941 */
6942static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6943                                            struct xdr_stream *xdr)
6944{
6945        struct compound_hdr hdr;
6946        int status;
6947
6948        status = decode_compound_hdr(xdr, &hdr);
6949        if (!status)
6950                status = decode_setclientid_confirm(xdr);
6951        return status;
6952}
6953
6954/*
6955 * Decode DELEGRETURN response
6956 */
6957static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6958                                    struct xdr_stream *xdr,
6959                                    struct nfs4_delegreturnres *res)
6960{
6961        struct compound_hdr hdr;
6962        int status;
6963
6964        status = decode_compound_hdr(xdr, &hdr);
6965        if (status)
6966                goto out;
6967        status = decode_sequence(xdr, &res->seq_res, rqstp);
6968        if (status)
6969                goto out;
6970        status = decode_putfh(xdr);
6971        if (status != 0)
6972                goto out;
6973        if (res->lr_res) {
6974                status = decode_layoutreturn(xdr, res->lr_res);
6975                res->lr_ret = status;
6976                if (status)
6977                        goto out;
6978        }
6979        status = decode_getfattr(xdr, res->fattr, res->server);
6980        if (status != 0)
6981                goto out;
6982        status = decode_delegreturn(xdr);
6983out:
6984        return status;
6985}
6986
6987/*
6988 * Decode FS_LOCATIONS response
6989 */
6990static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6991                                     struct xdr_stream *xdr,
6992                                     struct nfs4_fs_locations_res *res)
6993{
6994        struct compound_hdr hdr;
6995        int status;
6996
6997        status = decode_compound_hdr(xdr, &hdr);
6998        if (status)
6999                goto out;
7000        status = decode_sequence(xdr, &res->seq_res, req);

7001        if (status)
7002                goto out;
7003        status = decode_putfh(xdr);
7004        if (status)
7005                goto out;
7006        if (res->migration) {
7007                xdr_enter_page(xdr, PAGE_SIZE);
7008                status = decode_getfattr_generic(xdr,
7009                                        &res->fs_locations->fattr,
7010                                         NULL, res->fs_locations,
7011                                         NULL, res->fs_locations->server);
7012                if (status)
7013                        goto out;
7014                if (res->renew)
7015                        status = decode_renew(xdr);
7016        } else {
7017                status = decode_lookup(xdr);
7018                if (status)
7019                        goto out;
7020                xdr_enter_page(xdr, PAGE_SIZE);
7021                status = decode_getfattr_generic(xdr,
7022                                        &res->fs_locations->fattr,
7023                                         NULL, res->fs_locations,
7024                                         NULL, res->fs_locations->server);
7025        }
7026out:
7027        return status;
7028}
7029
7030/*
7031 * Decode SECINFO response
7032 */
7033static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
7034                                struct xdr_stream *xdr,
7035                                struct nfs4_secinfo_res *res)
7036{
7037        struct compound_hdr hdr;
7038        int status;
7039
7040        status = decode_compound_hdr(xdr, &hdr);
7041        if (status)
7042                goto out;
7043        status = decode_sequence(xdr, &res->seq_res, rqstp);
7044        if (status)
7045                goto out;
7046        status = decode_putfh(xdr);
7047        if (status)
7048                goto out;
7049        status = decode_secinfo(xdr, res);
7050out:
7051        return status;
7052}
7053
7054/*
7055 * Decode FSID_PRESENT response
7056 */
7057static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
7058                                     struct xdr_stream *xdr,
7059                                     struct nfs4_fsid_present_res *res)
7060{
7061        struct compound_hdr hdr;
7062        int status;
7063
7064        status = decode_compound_hdr(xdr, &hdr);
7065        if (status)
7066                goto out;
7067        status = decode_sequence(xdr, &res->seq_res, rqstp);
7068        if (status)
7069                goto out;
7070        status = decode_putfh(xdr);
7071        if (status)
7072                goto out;
7073        status = decode_getfh(xdr, res->fh);
7074        if (status)
7075                goto out;
7076        if (res->renew)
7077                status = decode_renew(xdr);
7078out:
7079        return status;
7080}
7081
7082#if defined(CONFIG_NFS_V4_1)
7083/*
7084 * Decode BIND_CONN_TO_SESSION response
7085 */
7086static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
7087                                        struct xdr_stream *xdr,
7088                                        void *res)
7089{
7090        struct compound_hdr hdr;
7091        int status;
7092
7093        status = decode_compound_hdr(xdr, &hdr);
7094        if (!status)
7095                status = decode_bind_conn_to_session(xdr, res);
7096        return status;
7097}
7098
7099/*
7100 * Decode EXCHANGE_ID response
7101 */
7102static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
7103                                    struct xdr_stream *xdr,
7104                                    void *res)
7105{
7106        struct compound_hdr hdr;
7107        int status;
7108
7109        status = decode_compound_hdr(xdr, &hdr);
7110        if (!status)
7111                status = decode_exchange_id(xdr, res);
7112        return status;
7113}
7114
7115/*
7116 * Decode CREATE_SESSION response
7117 */
7118static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
7119                                       struct xdr_stream *xdr,
7120                                       struct nfs41_create_session_res *res)
7121{
7122        struct compound_hdr hdr;
7123        int status;
7124
7125        status = decode_compound_hdr(xdr, &hdr);
7126        if (!status)
7127                status = decode_create_session(xdr, res);
7128        return status;
7129}
7130
7131/*
7132 * Decode DESTROY_SESSION response
7133 */
7134static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
7135                                        struct xdr_stream *xdr,
7136                                        void *res)
7137{
7138        struct compound_hdr hdr;
7139        int status;
7140
7141        status = decode_compound_hdr(xdr, &hdr);
7142        if (!status)
7143                status = decode_destroy_session(xdr, res);
7144        return status;
7145}
7146
7147/*
7148 * Decode DESTROY_CLIENTID response
7149 */
7150static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
7151                                        struct xdr_stream *xdr,
7152                                        void *res)
7153{
7154        struct compound_hdr hdr;
7155        int status;
7156
7157        status = decode_compound_hdr(xdr, &hdr);
7158        if (!status)
7159                status = decode_destroy_clientid(xdr, res);
7160        return status;
7161}
7162
7163/*
7164 * Decode SEQUENCE response
7165 */
7166static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
7167                                 struct xdr_stream *xdr,
7168                                 struct nfs4_sequence_res *res)
7169{
7170        struct compound_hdr hdr;
7171        int status;
7172
7173        status = decode_compound_hdr(xdr, &hdr);
7174        if (!status)
7175                status = decode_sequence(xdr, res, rqstp);
7176        return status;
7177}
7178
7179/*
7180 * Decode GET_LEASE_TIME response
7181 */
7182static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
7183                                       struct xdr_stream *xdr,
7184                                       struct nfs4_get_lease_time_res *res)
7185{
7186        struct compound_hdr hdr;
7187        int status;
7188
7189        status = decode_compound_hdr(xdr, &hdr);
7190        if (!status)
7191                status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
7192        if (!status)
7193                status = decode_putrootfh(xdr);
7194        if (!status)
7195                status = decode_fsinfo(xdr, res->lr_fsinfo);
7196        return status;
7197}
7198
7199/*
7200 * Decode RECLAIM_COMPLETE response
7201 */
7202static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7203                                         struct xdr_stream *xdr,
7204                                         struct nfs41_reclaim_complete_res *res)
7205{
7206        struct compound_hdr hdr;
7207        int status;
7208
7209        status = decode_compound_hdr(xdr, &hdr);
7210        if (!status)
7211                status = decode_sequence(xdr, &res->seq_res, rqstp);
7212        if (!status)
7213                status = decode_reclaim_complete(xdr, NULL);
7214        return status;
7215}
7216
7217/*
7218 * Decode GETDEVINFO response
7219 */
7220static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7221                                      struct xdr_stream *xdr,
7222                                      struct nfs4_getdeviceinfo_res *res)
7223{
7224        struct compound_hdr hdr;
7225        int status;
7226
7227        status = decode_compound_hdr(xdr, &hdr);
7228        if (status != 0)
7229                goto out;
7230        status = decode_sequence(xdr, &res->seq_res, rqstp);
7231        if (status != 0)
7232                goto out;
7233        status = decode_getdeviceinfo(xdr, res);
7234out:
7235        return status;
7236}
7237
7238/*
7239 * Decode LAYOUTGET response
7240 */
7241static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7242                                  struct xdr_stream *xdr,
7243                                  struct nfs4_layoutget_res *res)
7244{
7245        struct compound_hdr hdr;
7246        int status;
7247
7248        status = decode_compound_hdr(xdr, &hdr);
7249        if (status)
7250                goto out;
7251        status = decode_sequence(xdr, &res->seq_res, rqstp);
7252        if (status)
7253                goto out;
7254        status = decode_putfh(xdr);
7255        if (status)
7256                goto out;
7257        status = decode_layoutget(xdr, rqstp, res);
7258out:
7259        return status;
7260}
7261
7262/*
7263 * Decode LAYOUTRETURN response
7264 */
7265static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7266                                     struct xdr_stream *xdr,
7267                                     struct nfs4_layoutreturn_res *res)
7268{
7269        struct compound_hdr hdr;
7270        int status;
7271
7272        status = decode_compound_hdr(xdr, &hdr);
7273        if (status)
7274                goto out;
7275        status = decode_sequence(xdr, &res->seq_res, rqstp);
7276        if (status)
7277                goto out;
7278        status = decode_putfh(xdr);
7279        if (status)
7280                goto out;
7281        status = decode_layoutreturn(xdr, res);
7282out:
7283        return status;
7284}
7285
7286/*
7287 * Decode LAYOUTCOMMIT response
7288 */
7289static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7290                                     struct xdr_stream *xdr,
7291                                     struct nfs4_layoutcommit_res *res)
7292{
7293        struct compound_hdr hdr;
7294        int status;
7295
7296        status = decode_compound_hdr(xdr, &hdr);
7297        if (status)
7298                goto out;
7299        status = decode_sequence(xdr, &res->seq_res, rqstp);
7300        if (status)
7301                goto out;
7302        status = decode_putfh(xdr);
7303        if (status)
7304                goto out;
7305        status = decode_layoutcommit(xdr, rqstp, res);
7306        if (status)
7307                goto out;
7308        decode_getfattr(xdr, res->fattr, res->server);
7309out:
7310        return status;
7311}
7312
7313/*
7314 * Decode SECINFO_NO_NAME response
7315 */
7316static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7317                                        struct xdr_stream *xdr,
7318                                        struct nfs4_secinfo_res *res)
7319{
7320        struct compound_hdr hdr;
7321        int status;
7322
7323        status = decode_compound_hdr(xdr, &hdr);
7324        if (status)
7325                goto out;
7326        status = decode_sequence(xdr, &res->seq_res, rqstp);
7327        if (status)
7328                goto out;
7329        status = decode_putrootfh(xdr);
7330        if (status)
7331                goto out;
7332        status = decode_secinfo_no_name(xdr, res);
7333out:
7334        return status;
7335}
7336
7337/*
7338 * Decode TEST_STATEID response
7339 */
7340static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7341                                     struct xdr_stream *xdr,
7342                                     struct nfs41_test_stateid_res *res)
7343{
7344        struct compound_hdr hdr;
7345        int status;
7346
7347        status = decode_compound_hdr(xdr, &hdr);
7348        if (status)
7349                goto out;
7350        status = decode_sequence(xdr, &res->seq_res, rqstp);
7351        if (status)
7352                goto out;
7353        status = decode_test_stateid(xdr, res);
7354out:
7355        return status;
7356}
7357
7358/*
7359 * Decode FREE_STATEID response
7360 */
7361static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7362                                     struct xdr_stream *xdr,
7363                                     struct nfs41_free_stateid_res *res)
7364{
7365        struct compound_hdr hdr;
7366        int status;
7367
7368        status = decode_compound_hdr(xdr, &hdr);
7369        if (status)
7370                goto out;
7371        status = decode_sequence(xdr, &res->seq_res, rqstp);
7372        if (status)
7373                goto out;
7374        status = decode_free_stateid(xdr, res);
7375out:
7376        return status;
7377}
7378#endif /* CONFIG_NFS_V4_1 */
7379
7380/**
7381 * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7382 *                      the local page cache.
7383 * @xdr: XDR stream where entry resides
7384 * @entry: buffer to fill in with entry data
7385 * @plus: boolean indicating whether this should be a readdirplus entry
7386 *
7387 * Returns zero if successful, otherwise a negative errno value is
7388 * returned.
7389 *
7390 * This function is not invoked during READDIR reply decoding, but
7391 * rather whenever an application invokes the getdents(2) system call
7392 * on a directory already in our cache.
7393 */
7394int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7395                       int plus)
7396{
7397        unsigned int savep;
7398        uint32_t bitmap[3] = {0};
7399        uint32_t len;
7400        uint64_t new_cookie;
7401        __be32 *p = xdr_inline_decode(xdr, 4);
7402        if (unlikely(!p))
7403                goto out_overflow;
7404        if (*p == xdr_zero) {
7405                p = xdr_inline_decode(xdr, 4);
7406                if (unlikely(!p))
7407                        goto out_overflow;
7408                if (*p == xdr_zero)
7409                        return -EAGAIN;
7410                entry->eof = 1;
7411                return -EBADCOOKIE;
7412        }
7413
7414        p = xdr_inline_decode(xdr, 12);
7415        if (unlikely(!p))
7416                goto out_overflow;
7417        p = xdr_decode_hyper(p, &new_cookie);
7418        entry->len = be32_to_cpup(p);
7419
7420        p = xdr_inline_decode(xdr, entry->len);
7421        if (unlikely(!p))
7422                goto out_overflow;
7423        entry->name = (const char *) p;
7424
7425        /*
7426         * In case the server doesn't return an inode number,
7427         * we fake one here.  (We don't use inode number 0,
7428         * since glibc seems to choke on it...)
7429         */
7430        entry->ino = 1;
7431        entry->fattr->valid = 0;
7432
7433        if (decode_attr_bitmap(xdr, bitmap) < 0)
7434                goto out_overflow;
7435
7436        if (decode_attr_length(xdr, &len, &savep) < 0)
7437                goto out_overflow;
7438
7439        if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7440                        NULL, entry->label, entry->server) < 0)
7441                goto out_overflow;
7442        if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7443                entry->ino = entry->fattr->mounted_on_fileid;
7444        else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7445                entry->ino = entry->fattr->fileid;
7446
7447        entry->d_type = DT_UNKNOWN;
7448        if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7449                entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7450
7451        entry->prev_cookie = entry->cookie;
7452        entry->cookie = new_cookie;
7453
7454        return 0;
7455
7456out_overflow:
7457        print_overflow_msg(__func__, xdr);
7458        return -EAGAIN;
7459}
7460
7461/*
7462 * We need to translate between nfs status return values and
7463 * the local errno values which may not be the same.
7464 */
7465static struct {
7466        int stat;
7467        int errno;
7468} nfs_errtbl[] = {
7469        { NFS4_OK,              0               },
7470        { NFS4ERR_PERM,         -EPERM          },
7471        { NFS4ERR_NOENT,        -ENOENT         },
7472        { NFS4ERR_IO,           -errno_NFSERR_IO},
7473        { NFS4ERR_NXIO,         -ENXIO          },
7474        { NFS4ERR_ACCESS,       -EACCES         },
7475        { NFS4ERR_EXIST,        -EEXIST         },
7476        { NFS4ERR_XDEV,         -EXDEV          },
7477        { NFS4ERR_NOTDIR,       -ENOTDIR        },
7478        { NFS4ERR_ISDIR,        -EISDIR         },
7479        { NFS4ERR_INVAL,        -EINVAL         },
7480        { NFS4ERR_FBIG,         -EFBIG          },
7481        { NFS4ERR_NOSPC,        -ENOSPC         },
7482        { NFS4ERR_ROFS,         -EROFS          },
7483        { NFS4ERR_MLINK,        -EMLINK         },
7484        { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
7485        { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
7486        { NFS4ERR_DQUOT,        -EDQUOT         },
7487        { NFS4ERR_STALE,        -ESTALE         },
7488        { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
7489        { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
7490        { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
7491        { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
7492        { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
7493        { NFS4ERR_BADTYPE,      -EBADTYPE       },
7494        { NFS4ERR_LOCKED,       -EAGAIN         },
7495        { NFS4ERR_SYMLINK,      -ELOOP          },
7496        { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
7497        { NFS4ERR_DEADLOCK,     -EDEADLK        },
7498        { -1,                   -EIO            }
7499};
7500
7501/*
7502 * Convert an NFS error code to a local one.
7503 * This one is used jointly by NFSv2 and NFSv3.
7504 */
7505static int
7506nfs4_stat_to_errno(int stat)
7507{
7508        int i;
7509        for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7510                if (nfs_errtbl[i].stat == stat)
7511                        return nfs_errtbl[i].errno;
7512        }
7513        if (stat <= 10000 || stat > 10100) {
7514                /* The server is looney tunes. */
7515                return -EREMOTEIO;
7516        }
7517        /* If we cannot translate the error, the recovery routines should
7518         * handle it.
7519         * Note: remaining NFSv4 error codes have values > 10000, so should
7520         * not conflict with native Linux error codes.
7521         */
7522        return -stat;
7523}
7524
7525#ifdef CONFIG_NFS_V4_2
7526#include "nfs42xdr.c"
7527#endif /* CONFIG_NFS_V4_2 */
7528
7529#define PROC(proc, argtype, restype)                            \
7530[NFSPROC4_CLNT_##proc] = {                                      \
7531        .p_proc   = NFSPROC4_COMPOUND,                          \
7532        .p_encode = (kxdreproc_t)nfs4_xdr_##argtype,            \
7533        .p_decode = (kxdrdproc_t)nfs4_xdr_##restype,            \
7534        .p_arglen = NFS4_##argtype##_sz,                        \
7535        .p_replen = NFS4_##restype##_sz,                        \
7536        .p_statidx = NFSPROC4_CLNT_##proc,                      \
7537        .p_name   = #proc,                                      \
7538}
7539
7540#define STUB(proc)              \
7541[NFSPROC4_CLNT_##proc] = {      \
7542        .p_name = #proc,        \
7543}
7544
7545struct rpc_procinfo     nfs4_procedures[] = {
7546        PROC(READ,              enc_read,               dec_read),
7547        PROC(WRITE,             enc_write,              dec_write),
7548        PROC(COMMIT,            enc_commit,             dec_commit),
7549        PROC(OPEN,              enc_open,               dec_open),
7550        PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
7551        PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
7552        PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
7553        PROC(CLOSE,             enc_close,              dec_close),
7554        PROC(SETATTR,           enc_setattr,            dec_setattr),
7555        PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
7556        PROC(RENEW,             enc_renew,              dec_renew),
7557        PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
7558        PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7559        PROC(LOCK,              enc_lock,               dec_lock),
7560        PROC(LOCKT,             enc_lockt,              dec_lockt),
7561        PROC(LOCKU,             enc_locku,              dec_locku),
7562        PROC(ACCESS,            enc_access,             dec_access),
7563        PROC(GETATTR,           enc_getattr,            dec_getattr),
7564        PROC(LOOKUP,            enc_lookup,             dec_lookup),
7565        PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
7566        PROC(REMOVE,            enc_remove,             dec_remove),
7567        PROC(RENAME,            enc_rename,             dec_rename),
7568        PROC(LINK,              enc_link,               dec_link),
7569        PROC(SYMLINK,           enc_symlink,            dec_symlink),
7570        PROC(CREATE,            enc_create,             dec_create),
7571        PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
7572        PROC(STATFS,            enc_statfs,             dec_statfs),
7573        PROC(READLINK,          enc_readlink,           dec_readlink),
7574        PROC(READDIR,           enc_readdir,            dec_readdir),
7575        PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
7576        PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
7577        PROC(GETACL,            enc_getacl,             dec_getacl),
7578        PROC(SETACL,            enc_setacl,             dec_setacl),
7579        PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
7580        PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
7581        PROC(SECINFO,           enc_secinfo,            dec_secinfo),
7582        PROC(FSID_PRESENT,      enc_fsid_present,       dec_fsid_present),
7583#if defined(CONFIG_NFS_V4_1)
7584        PROC(EXCHANGE_ID,       enc_exchange_id,        dec_exchange_id),
7585        PROC(CREATE_SESSION,    enc_create_session,     dec_create_session),
7586        PROC(DESTROY_SESSION,   enc_destroy_session,    dec_destroy_session),
7587        PROC(SEQUENCE,          enc_sequence,           dec_sequence),
7588        PROC(GET_LEASE_TIME,    enc_get_lease_time,     dec_get_lease_time),
7589        PROC(RECLAIM_COMPLETE,  enc_reclaim_complete,   dec_reclaim_complete),
7590        PROC(GETDEVICEINFO,     enc_getdeviceinfo,      dec_getdeviceinfo),
7591        PROC(LAYOUTGET,         enc_layoutget,          dec_layoutget),
7592        PROC(LAYOUTCOMMIT,      enc_layoutcommit,       dec_layoutcommit),
7593        PROC(LAYOUTRETURN,      enc_layoutreturn,       dec_layoutreturn),
7594        PROC(SECINFO_NO_NAME,   enc_secinfo_no_name,    dec_secinfo_no_name),
7595        PROC(TEST_STATEID,      enc_test_stateid,       dec_test_stateid),
7596        PROC(FREE_STATEID,      enc_free_stateid,       dec_free_stateid),
7597        STUB(GETDEVICELIST),
7598        PROC(BIND_CONN_TO_SESSION,
7599                        enc_bind_conn_to_session, dec_bind_conn_to_session),
7600        PROC(DESTROY_CLIENTID,  enc_destroy_clientid,   dec_destroy_clientid),
7601#endif /* CONFIG_NFS_V4_1 */
7602#ifdef CONFIG_NFS_V4_2
7603        PROC(SEEK,              enc_seek,               dec_seek),
7604        PROC(ALLOCATE,          enc_allocate,           dec_allocate),
7605        PROC(DEALLOCATE,        enc_deallocate,         dec_deallocate),
7606        PROC(LAYOUTSTATS,       enc_layoutstats,        dec_layoutstats),
7607        PROC(CLONE,             enc_clone,              dec_clone),
7608        PROC(COPY,              enc_copy,               dec_copy),
7609#endif /* CONFIG_NFS_V4_2 */
7610};
7611
7612const struct rpc_version nfs_version4 = {
7613        .number                 = 4,
7614        .nrprocs                = ARRAY_SIZE(nfs4_procedures),
7615        .procs                  = nfs4_procedures
7616};
7617
7618/*
7619 * Local variables:
7620 *  c-basic-offset: 8
7621 * End:
7622 */
7623