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
  56#include "nfs4_fs.h"
  57#include "internal.h"
  58#include "nfs4idmap.h"
  59#include "nfs4session.h"
  60#include "pnfs.h"
  61#include "netns.h"
  62
  63#define NFSDBG_FACILITY         NFSDBG_XDR
  64
  65/* Mapping from NFS error code to "errno" error code. */
  66#define errno_NFSERR_IO         EIO
  67
  68static int nfs4_stat_to_errno(int);
  69
  70/* NFSv4 COMPOUND tags are only wanted for debugging purposes */
  71#ifdef DEBUG
  72#define NFS4_MAXTAGLEN          20
  73#else
  74#define NFS4_MAXTAGLEN          0
  75#endif
  76
  77/* lock,open owner id:
  78 * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT  >> 2)
  79 */
  80#define open_owner_id_maxsz     (1 + 2 + 1 + 1 + 2)
  81#define lock_owner_id_maxsz     (1 + 1 + 4)
  82#define decode_lockowner_maxsz  (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  83#define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  84#define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  85#define op_encode_hdr_maxsz     (1)
  86#define op_decode_hdr_maxsz     (2)
  87#define encode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  88#define decode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  89#define encode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  90#define decode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  91#define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
  92                                (NFS4_FHSIZE >> 2))
  93#define decode_putfh_maxsz      (op_decode_hdr_maxsz)
  94#define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
  95#define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
  96#define encode_getfh_maxsz      (op_encode_hdr_maxsz)
  97#define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
  98                                ((3+NFS4_FHSIZE) >> 2))
  99#define nfs4_fattr_bitmap_maxsz 4
 100#define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
 101#define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
 102#define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
 103#define nfs4_owner_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 104#define nfs4_group_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 105#ifdef CONFIG_NFS_V4_SECURITY_LABEL
 106/* PI(4 bytes) + LFS(4 bytes) + 1(for null terminator?) + MAXLABELLEN */
 107#define nfs4_label_maxsz        (4 + 4 + 1 + XDR_QUADLEN(NFS4_MAXLABELLEN))
 108#else
 109#define nfs4_label_maxsz        0
 110#endif
 111/* We support only one layout type per file system */
 112#define decode_mdsthreshold_maxsz (1 + 1 + nfs4_fattr_bitmap_maxsz + 1 + 8)
 113/* This is based on getfattr, which uses the most attributes: */
 114#define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
 115                                3 + 3 + 3 + nfs4_owner_maxsz + \
 116                                nfs4_group_maxsz + nfs4_label_maxsz + \
 117                                 decode_mdsthreshold_maxsz))
 118#define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
 119                                nfs4_fattr_value_maxsz)
 120#define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
 121#define encode_attrs_maxsz      (nfs4_fattr_bitmap_maxsz + \
 122                                 1 + 2 + 1 + \
 123                                nfs4_owner_maxsz + \
 124                                nfs4_group_maxsz + \
 125                                nfs4_label_maxsz + \
 126                                4 + 4)
 127#define encode_savefh_maxsz     (op_encode_hdr_maxsz)
 128#define decode_savefh_maxsz     (op_decode_hdr_maxsz)
 129#define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
 130#define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 131#define encode_fsinfo_maxsz     (encode_getattr_maxsz)
 132/* The 5 accounts for the PNFS attributes, and assumes that at most three
 133 * layout types will be returned.
 134 */
 135#define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + \
 136                                 nfs4_fattr_bitmap_maxsz + 4 + 8 + 5)
 137#define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 138#define decode_renew_maxsz      (op_decode_hdr_maxsz)
 139#define encode_setclientid_maxsz \
 140                                (op_encode_hdr_maxsz + \
 141                                XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 142                                /* client name */ \
 143                                1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 144                                1 /* sc_prog */ + \
 145                                1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 146                                1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
 147                                1) /* sc_cb_ident */
 148#define decode_setclientid_maxsz \
 149                                (op_decode_hdr_maxsz + \
 150                                2 /* clientid */ + \
 151                                XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 152                                1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 153                                1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN))
 154#define encode_setclientid_confirm_maxsz \
 155                                (op_encode_hdr_maxsz + \
 156                                3 + (NFS4_VERIFIER_SIZE >> 2))
 157#define decode_setclientid_confirm_maxsz \
 158                                (op_decode_hdr_maxsz)
 159#define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
 160#define decode_lookup_maxsz     (op_decode_hdr_maxsz)
 161#define encode_share_access_maxsz \
 162                                (2)
 163#define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
 164#define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
 165#define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
 166#define encode_open_maxsz       (op_encode_hdr_maxsz + \
 167                                2 + encode_share_access_maxsz + 2 + \
 168                                open_owner_id_maxsz + \
 169                                encode_opentype_maxsz + \
 170                                encode_claim_null_maxsz)
 171#define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
 172#define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
 173                                decode_ace_maxsz)
 174#define decode_change_info_maxsz        (5)
 175#define decode_open_maxsz       (op_decode_hdr_maxsz + \
 176                                decode_stateid_maxsz + \
 177                                decode_change_info_maxsz + 1 + \
 178                                nfs4_fattr_bitmap_maxsz + \
 179                                decode_delegation_maxsz)
 180#define encode_open_confirm_maxsz \
 181                                (op_encode_hdr_maxsz + \
 182                                 encode_stateid_maxsz + 1)
 183#define decode_open_confirm_maxsz \
 184                                (op_decode_hdr_maxsz + \
 185                                 decode_stateid_maxsz)
 186#define encode_open_downgrade_maxsz \
 187                                (op_encode_hdr_maxsz + \
 188                                 encode_stateid_maxsz + 1 + \
 189                                 encode_share_access_maxsz)
 190#define decode_open_downgrade_maxsz \
 191                                (op_decode_hdr_maxsz + \
 192                                 decode_stateid_maxsz)
 193#define encode_close_maxsz      (op_encode_hdr_maxsz + \
 194                                 1 + encode_stateid_maxsz)
 195#define decode_close_maxsz      (op_decode_hdr_maxsz + \
 196                                 decode_stateid_maxsz)
 197#define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
 198                                 encode_stateid_maxsz + \
 199                                 encode_attrs_maxsz)
 200#define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
 201                                 nfs4_fattr_bitmap_maxsz)
 202#define encode_read_maxsz       (op_encode_hdr_maxsz + \
 203                                 encode_stateid_maxsz + 3)
 204#define decode_read_maxsz       (op_decode_hdr_maxsz + 2)
 205#define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
 206                                 2 + encode_verifier_maxsz + 5 + \
 207                                nfs4_label_maxsz)
 208#define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
 209                                 decode_verifier_maxsz)
 210#define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 211#define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1)
 212#define encode_write_maxsz      (op_encode_hdr_maxsz + \
 213                                 encode_stateid_maxsz + 4)
 214#define decode_write_maxsz      (op_decode_hdr_maxsz + \
 215                                 2 + decode_verifier_maxsz)
 216#define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
 217#define decode_commit_maxsz     (op_decode_hdr_maxsz + \
 218                                 decode_verifier_maxsz)
 219#define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 220                                nfs4_name_maxsz)
 221#define decode_remove_maxsz     (op_decode_hdr_maxsz + \
 222                                 decode_change_info_maxsz)
 223#define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 224                                2 * nfs4_name_maxsz)
 225#define decode_rename_maxsz     (op_decode_hdr_maxsz + \
 226                                 decode_change_info_maxsz + \
 227                                 decode_change_info_maxsz)
 228#define encode_link_maxsz       (op_encode_hdr_maxsz + \
 229                                nfs4_name_maxsz)
 230#define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
 231#define encode_lockowner_maxsz  (7)
 232#define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 233                                 7 + \
 234                                 1 + encode_stateid_maxsz + 1 + \
 235                                 encode_lockowner_maxsz)
 236#define decode_lock_denied_maxsz \
 237                                (8 + decode_lockowner_maxsz)
 238#define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 239                                 decode_lock_denied_maxsz)
 240#define encode_lockt_maxsz      (op_encode_hdr_maxsz + 5 + \
 241                                encode_lockowner_maxsz)
 242#define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 243                                 decode_lock_denied_maxsz)
 244#define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 245                                 encode_stateid_maxsz + \
 246                                 4)
 247#define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 248                                 decode_stateid_maxsz)
 249#define encode_release_lockowner_maxsz \
 250                                (op_encode_hdr_maxsz + \
 251                                 encode_lockowner_maxsz)
 252#define decode_release_lockowner_maxsz \
 253                                (op_decode_hdr_maxsz)
 254#define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 255#define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 256#define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 257                                1 + nfs4_name_maxsz + \
 258                                1 + \
 259                                nfs4_fattr_maxsz)
 260#define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 261#define encode_create_maxsz     (op_encode_hdr_maxsz + \
 262                                1 + 2 + nfs4_name_maxsz + \
 263                                encode_attrs_maxsz)
 264#define decode_create_maxsz     (op_decode_hdr_maxsz + \
 265                                decode_change_info_maxsz + \
 266                                nfs4_fattr_bitmap_maxsz)
 267#define encode_statfs_maxsz     (encode_getattr_maxsz)
 268#define decode_statfs_maxsz     (decode_getattr_maxsz)
 269#define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 270#define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 271#define encode_getacl_maxsz     (encode_getattr_maxsz)
 272#define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 273                                 nfs4_fattr_bitmap_maxsz + 1)
 274#define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 275                                 encode_stateid_maxsz + 3)
 276#define decode_setacl_maxsz     (decode_setattr_maxsz)
 277#define encode_fs_locations_maxsz \
 278                                (encode_getattr_maxsz)
 279#define decode_fs_locations_maxsz \
 280                                (0)
 281#define encode_secinfo_maxsz    (op_encode_hdr_maxsz + nfs4_name_maxsz)
 282#define decode_secinfo_maxsz    (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
 283
 284#if defined(CONFIG_NFS_V4_1)
 285#define NFS4_MAX_MACHINE_NAME_LEN (64)
 286#define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \
 287                         sizeof(utsname()->version) + sizeof(utsname()->machine) + 8)
 288
 289#define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
 290                                encode_verifier_maxsz + \
 291                                1 /* co_ownerid.len */ + \
 292                                /* eia_clientowner */ \
 293                                1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 294                                1 /* flags */ + \
 295                                1 /* spa_how */ + \
 296                                /* max is SP4_MACH_CRED (for now) */ + \
 297                                1 + NFS4_OP_MAP_NUM_WORDS + \
 298                                1 + NFS4_OP_MAP_NUM_WORDS + \
 299                                1 /* implementation id array of size 1 */ + \
 300                                1 /* nii_domain */ + \
 301                                XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 302                                1 /* nii_name */ + \
 303                                XDR_QUADLEN(IMPL_NAME_LIMIT) + \
 304                                3 /* nii_date */)
 305#define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
 306                                2 /* eir_clientid */ + \
 307                                1 /* eir_sequenceid */ + \
 308                                1 /* eir_flags */ + \
 309                                1 /* spr_how */ + \
 310                                  /* max is SP4_MACH_CRED (for now) */ + \
 311                                1 + NFS4_OP_MAP_NUM_WORDS + \
 312                                1 + NFS4_OP_MAP_NUM_WORDS + \
 313                                2 /* eir_server_owner.so_minor_id */ + \
 314                                /* eir_server_owner.so_major_id<> */ \
 315                                XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 316                                /* eir_server_scope<> */ \
 317                                XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 318                                1 /* eir_server_impl_id array length */ + \
 319                                1 /* nii_domain */ + \
 320                                XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 321                                1 /* nii_name */ + \
 322                                XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 323                                3 /* nii_date */)
 324#define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
 325#define decode_channel_attrs_maxsz  (6 + \
 326                                     1 /* ca_rdma_ird.len */ + \
 327                                     1 /* ca_rdma_ird */)
 328#define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
 329                                     2 /* csa_clientid */ + \
 330                                     1 /* csa_sequence */ + \
 331                                     1 /* csa_flags */ + \
 332                                     encode_channel_attrs_maxsz + \
 333                                     encode_channel_attrs_maxsz + \
 334                                     1 /* csa_cb_program */ + \
 335                                     1 /* csa_sec_parms.len (1) */ + \
 336                                     1 /* cb_secflavor (AUTH_SYS) */ + \
 337                                     1 /* stamp */ + \
 338                                     1 /* machinename.len */ + \
 339                                     XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
 340                                     1 /* uid */ + \
 341                                     1 /* gid */ + \
 342                                     1 /* gids.len (0) */)
 343#define decode_create_session_maxsz  (op_decode_hdr_maxsz +     \
 344                                     XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 345                                     1 /* csr_sequence */ + \
 346                                     1 /* csr_flags */ + \
 347                                     decode_channel_attrs_maxsz + \
 348                                     decode_channel_attrs_maxsz)
 349#define encode_bind_conn_to_session_maxsz  (op_encode_hdr_maxsz + \
 350                                     /* bctsa_sessid */ \
 351                                     XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 352                                     1 /* bctsa_dir */ + \
 353                                     1 /* bctsa_use_conn_in_rdma_mode */)
 354#define decode_bind_conn_to_session_maxsz  (op_decode_hdr_maxsz +       \
 355                                     /* bctsr_sessid */ \
 356                                     XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 357                                     1 /* bctsr_dir */ + \
 358                                     1 /* bctsr_use_conn_in_rdma_mode */)
 359#define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
 360#define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
 361#define encode_destroy_clientid_maxsz   (op_encode_hdr_maxsz + 2)
 362#define decode_destroy_clientid_maxsz   (op_decode_hdr_maxsz)
 363#define encode_sequence_maxsz   (op_encode_hdr_maxsz + \
 364                                XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
 365#define decode_sequence_maxsz   (op_decode_hdr_maxsz + \
 366                                XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
 367#define encode_reclaim_complete_maxsz   (op_encode_hdr_maxsz + 4)
 368#define decode_reclaim_complete_maxsz   (op_decode_hdr_maxsz + 4)
 369#define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + \
 370                                XDR_QUADLEN(NFS4_DEVICEID4_SIZE) + \
 371                                1 /* layout type */ + \
 372                                1 /* maxcount */ + \
 373                                1 /* bitmap size */ + \
 374                                1 /* notification bitmap length */ + \
 375                                1 /* notification bitmap, word 0 */)
 376#define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
 377                                1 /* layout type */ + \
 378                                1 /* opaque devaddr4 length */ + \
 379                                  /* devaddr4 payload is read into page */ \
 380                                1 /* notification bitmap length */ + \
 381                                1 /* notification bitmap, word 0 */)
 382#define encode_layoutget_maxsz  (op_encode_hdr_maxsz + 10 + \
 383                                encode_stateid_maxsz)
 384#define decode_layoutget_maxsz  (op_decode_hdr_maxsz + 8 + \
 385                                decode_stateid_maxsz + \
 386                                XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
 387#define encode_layoutcommit_maxsz (op_encode_hdr_maxsz +          \
 388                                2 /* offset */ + \
 389                                2 /* length */ + \
 390                                1 /* reclaim */ + \
 391                                encode_stateid_maxsz + \
 392                                1 /* new offset (true) */ + \
 393                                2 /* last byte written */ + \
 394                                1 /* nt_timechanged (false) */ + \
 395                                1 /* layoutupdate4 layout type */ + \
 396                                1 /* layoutupdate4 opaqueue len */)
 397                                  /* the actual content of layoutupdate4 should
 398                                     be allocated by drivers and spliced in
 399                                     using xdr_write_pages */
 400#define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
 401#define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
 402                                encode_stateid_maxsz + \
 403                                1 /* FIXME: opaque lrf_body always empty at the moment */)
 404#define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
 405                                1 + decode_stateid_maxsz)
 406#define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
 407#define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
 408#define encode_test_stateid_maxsz       (op_encode_hdr_maxsz + 2 + \
 409                                         XDR_QUADLEN(NFS4_STATEID_SIZE))
 410#define decode_test_stateid_maxsz       (op_decode_hdr_maxsz + 2 + 1)
 411#define encode_free_stateid_maxsz       (op_encode_hdr_maxsz + 1 + \
 412                                         XDR_QUADLEN(NFS4_STATEID_SIZE))
 413#define decode_free_stateid_maxsz       (op_decode_hdr_maxsz)
 414#else /* CONFIG_NFS_V4_1 */
 415#define encode_sequence_maxsz   0
 416#define decode_sequence_maxsz   0
 417#endif /* CONFIG_NFS_V4_1 */
 418
 419#define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 420#define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 421#define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 422                                encode_sequence_maxsz + \
 423                                encode_putfh_maxsz + \
 424                                encode_read_maxsz)
 425#define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 426                                decode_sequence_maxsz + \
 427                                decode_putfh_maxsz + \
 428                                decode_read_maxsz)
 429#define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 430                                encode_sequence_maxsz + \
 431                                encode_putfh_maxsz + \
 432                                encode_readlink_maxsz)
 433#define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 434                                decode_sequence_maxsz + \
 435                                decode_putfh_maxsz + \
 436                                decode_readlink_maxsz)
 437#define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 438                                encode_sequence_maxsz + \
 439                                encode_putfh_maxsz + \
 440                                encode_readdir_maxsz)
 441#define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 442                                decode_sequence_maxsz + \
 443                                decode_putfh_maxsz + \
 444                                decode_readdir_maxsz)
 445#define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 446                                encode_sequence_maxsz + \
 447                                encode_putfh_maxsz + \
 448                                encode_write_maxsz + \
 449                                encode_getattr_maxsz)
 450#define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 451                                decode_sequence_maxsz + \
 452                                decode_putfh_maxsz + \
 453                                decode_write_maxsz + \
 454                                decode_getattr_maxsz)
 455#define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 456                                encode_sequence_maxsz + \
 457                                encode_putfh_maxsz + \
 458                                encode_commit_maxsz)
 459#define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 460                                decode_sequence_maxsz + \
 461                                decode_putfh_maxsz + \
 462                                decode_commit_maxsz)
 463#define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 464                                encode_sequence_maxsz + \
 465                                encode_putfh_maxsz + \
 466                                encode_open_maxsz + \
 467                                encode_access_maxsz + \
 468                                encode_getfh_maxsz + \
 469                                encode_getattr_maxsz)
 470#define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 471                                decode_sequence_maxsz + \
 472                                decode_putfh_maxsz + \
 473                                decode_open_maxsz + \
 474                                decode_access_maxsz + \
 475                                decode_getfh_maxsz + \
 476                                decode_getattr_maxsz)
 477#define NFS4_enc_open_confirm_sz \
 478                                (compound_encode_hdr_maxsz + \
 479                                 encode_putfh_maxsz + \
 480                                 encode_open_confirm_maxsz)
 481#define NFS4_dec_open_confirm_sz \
 482                                (compound_decode_hdr_maxsz + \
 483                                 decode_putfh_maxsz + \
 484                                 decode_open_confirm_maxsz)
 485#define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 486                                        encode_sequence_maxsz + \
 487                                        encode_putfh_maxsz + \
 488                                        encode_open_maxsz + \
 489                                        encode_access_maxsz + \
 490                                        encode_getattr_maxsz)
 491#define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 492                                        decode_sequence_maxsz + \
 493                                        decode_putfh_maxsz + \
 494                                        decode_open_maxsz + \
 495                                        decode_access_maxsz + \
 496                                        decode_getattr_maxsz)
 497#define NFS4_enc_open_downgrade_sz \
 498                                (compound_encode_hdr_maxsz + \
 499                                 encode_sequence_maxsz + \
 500                                 encode_putfh_maxsz + \
 501                                 encode_open_downgrade_maxsz + \
 502                                 encode_getattr_maxsz)
 503#define NFS4_dec_open_downgrade_sz \
 504                                (compound_decode_hdr_maxsz + \
 505                                 decode_sequence_maxsz + \
 506                                 decode_putfh_maxsz + \
 507                                 decode_open_downgrade_maxsz + \
 508                                 decode_getattr_maxsz)
 509#define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 510                                 encode_sequence_maxsz + \
 511                                 encode_putfh_maxsz + \
 512                                 encode_close_maxsz + \
 513                                 encode_getattr_maxsz)
 514#define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 515                                 decode_sequence_maxsz + \
 516                                 decode_putfh_maxsz + \
 517                                 decode_close_maxsz + \
 518                                 decode_getattr_maxsz)
 519#define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 520                                 encode_sequence_maxsz + \
 521                                 encode_putfh_maxsz + \
 522                                 encode_setattr_maxsz + \
 523                                 encode_getattr_maxsz)
 524#define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 525                                 decode_sequence_maxsz + \
 526                                 decode_putfh_maxsz + \
 527                                 decode_setattr_maxsz + \
 528                                 decode_getattr_maxsz)
 529#define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 530                                encode_sequence_maxsz + \
 531                                encode_putfh_maxsz + \
 532                                encode_fsinfo_maxsz)
 533#define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 534                                decode_sequence_maxsz + \
 535                                decode_putfh_maxsz + \
 536                                decode_fsinfo_maxsz)
 537#define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 538                                encode_renew_maxsz)
 539#define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 540                                decode_renew_maxsz)
 541#define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 542                                encode_setclientid_maxsz)
 543#define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 544                                decode_setclientid_maxsz)
 545#define NFS4_enc_setclientid_confirm_sz \
 546                                (compound_encode_hdr_maxsz + \
 547                                encode_setclientid_confirm_maxsz)
 548#define NFS4_dec_setclientid_confirm_sz \
 549                                (compound_decode_hdr_maxsz + \
 550                                decode_setclientid_confirm_maxsz)
 551#define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 552                                encode_sequence_maxsz + \
 553                                encode_putfh_maxsz + \
 554                                encode_lock_maxsz)
 555#define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 556                                decode_sequence_maxsz + \
 557                                decode_putfh_maxsz + \
 558                                decode_lock_maxsz)
 559#define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 560                                encode_sequence_maxsz + \
 561                                encode_putfh_maxsz + \
 562                                encode_lockt_maxsz)
 563#define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 564                                 decode_sequence_maxsz + \
 565                                 decode_putfh_maxsz + \
 566                                 decode_lockt_maxsz)
 567#define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 568                                encode_sequence_maxsz + \
 569                                encode_putfh_maxsz + \
 570                                encode_locku_maxsz)
 571#define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 572                                decode_sequence_maxsz + \
 573                                decode_putfh_maxsz + \
 574                                decode_locku_maxsz)
 575#define NFS4_enc_release_lockowner_sz \
 576                                (compound_encode_hdr_maxsz + \
 577                                 encode_lockowner_maxsz)
 578#define NFS4_dec_release_lockowner_sz \
 579                                (compound_decode_hdr_maxsz + \
 580                                 decode_lockowner_maxsz)
 581#define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 582                                encode_sequence_maxsz + \
 583                                encode_putfh_maxsz + \
 584                                encode_access_maxsz + \
 585                                encode_getattr_maxsz)
 586#define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 587                                decode_sequence_maxsz + \
 588                                decode_putfh_maxsz + \
 589                                decode_access_maxsz + \
 590                                decode_getattr_maxsz)
 591#define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 592                                encode_sequence_maxsz + \
 593                                encode_putfh_maxsz + \
 594                                encode_getattr_maxsz + \
 595                                encode_renew_maxsz)
 596#define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 597                                decode_sequence_maxsz + \
 598                                decode_putfh_maxsz + \
 599                                decode_getattr_maxsz + \
 600                                decode_renew_maxsz)
 601#define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 602                                encode_sequence_maxsz + \
 603                                encode_putfh_maxsz + \
 604                                encode_lookup_maxsz + \
 605                                encode_getattr_maxsz + \
 606                                encode_getfh_maxsz)
 607#define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 608                                decode_sequence_maxsz + \
 609                                decode_putfh_maxsz + \
 610                                decode_lookup_maxsz + \
 611                                decode_getattr_maxsz + \
 612                                decode_getfh_maxsz)
 613#define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 614                                encode_sequence_maxsz + \
 615                                encode_putrootfh_maxsz + \
 616                                encode_getattr_maxsz + \
 617                                encode_getfh_maxsz)
 618#define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 619                                decode_sequence_maxsz + \
 620                                decode_putrootfh_maxsz + \
 621                                decode_getattr_maxsz + \
 622                                decode_getfh_maxsz)
 623#define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 624                                encode_sequence_maxsz + \
 625                                encode_putfh_maxsz + \
 626                                encode_remove_maxsz)
 627#define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 628                                decode_sequence_maxsz + \
 629                                decode_putfh_maxsz + \
 630                                decode_remove_maxsz)
 631#define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 632                                encode_sequence_maxsz + \
 633                                encode_putfh_maxsz + \
 634                                encode_savefh_maxsz + \
 635                                encode_putfh_maxsz + \
 636                                encode_rename_maxsz)
 637#define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 638                                decode_sequence_maxsz + \
 639                                decode_putfh_maxsz + \
 640                                decode_savefh_maxsz + \
 641                                decode_putfh_maxsz + \
 642                                decode_rename_maxsz)
 643#define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 644                                encode_sequence_maxsz + \
 645                                encode_putfh_maxsz + \
 646                                encode_savefh_maxsz + \
 647                                encode_putfh_maxsz + \
 648                                encode_link_maxsz + \
 649                                encode_restorefh_maxsz + \
 650                                encode_getattr_maxsz)
 651#define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 652                                decode_sequence_maxsz + \
 653                                decode_putfh_maxsz + \
 654                                decode_savefh_maxsz + \
 655                                decode_putfh_maxsz + \
 656                                decode_link_maxsz + \
 657                                decode_restorefh_maxsz + \
 658                                decode_getattr_maxsz)
 659#define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 660                                encode_sequence_maxsz + \
 661                                encode_putfh_maxsz + \
 662                                encode_symlink_maxsz + \
 663                                encode_getattr_maxsz + \
 664                                encode_getfh_maxsz)
 665#define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 666                                decode_sequence_maxsz + \
 667                                decode_putfh_maxsz + \
 668                                decode_symlink_maxsz + \
 669                                decode_getattr_maxsz + \
 670                                decode_getfh_maxsz)
 671#define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 672                                encode_sequence_maxsz + \
 673                                encode_putfh_maxsz + \
 674                                encode_create_maxsz + \
 675                                encode_getfh_maxsz + \
 676                                encode_getattr_maxsz)
 677#define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 678                                decode_sequence_maxsz + \
 679                                decode_putfh_maxsz + \
 680                                decode_create_maxsz + \
 681                                decode_getfh_maxsz + \
 682                                decode_getattr_maxsz)
 683#define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 684                                encode_sequence_maxsz + \
 685                                encode_putfh_maxsz + \
 686                                encode_getattr_maxsz)
 687#define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 688                                decode_sequence_maxsz + \
 689                                decode_putfh_maxsz + \
 690                                decode_getattr_maxsz)
 691#define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 692                                encode_sequence_maxsz + \
 693                                encode_putfh_maxsz + \
 694                                encode_statfs_maxsz)
 695#define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 696                                decode_sequence_maxsz + \
 697                                decode_putfh_maxsz + \
 698                                decode_statfs_maxsz)
 699#define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 700                                encode_sequence_maxsz + \
 701                                encode_putfh_maxsz + \
 702                                encode_getattr_maxsz)
 703#define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 704                                decode_sequence_maxsz + \
 705                                decode_putfh_maxsz + \
 706                                decode_getattr_maxsz)
 707#define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 708                                encode_sequence_maxsz + \
 709                                encode_putfh_maxsz + \
 710                                encode_delegreturn_maxsz + \
 711                                encode_getattr_maxsz)
 712#define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 713                                decode_sequence_maxsz + \
 714                                decode_delegreturn_maxsz + \
 715                                decode_getattr_maxsz)
 716#define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 717                                encode_sequence_maxsz + \
 718                                encode_putfh_maxsz + \
 719                                encode_getacl_maxsz)
 720#define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 721                                decode_sequence_maxsz + \
 722                                decode_putfh_maxsz + \
 723                                decode_getacl_maxsz)
 724#define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 725                                encode_sequence_maxsz + \
 726                                encode_putfh_maxsz + \
 727                                encode_setacl_maxsz)
 728#define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 729                                decode_sequence_maxsz + \
 730                                decode_putfh_maxsz + \
 731                                decode_setacl_maxsz)
 732#define NFS4_enc_fs_locations_sz \
 733                                (compound_encode_hdr_maxsz + \
 734                                 encode_sequence_maxsz + \
 735                                 encode_putfh_maxsz + \
 736                                 encode_lookup_maxsz + \
 737                                 encode_fs_locations_maxsz + \
 738                                 encode_renew_maxsz)
 739#define NFS4_dec_fs_locations_sz \
 740                                (compound_decode_hdr_maxsz + \
 741                                 decode_sequence_maxsz + \
 742                                 decode_putfh_maxsz + \
 743                                 decode_lookup_maxsz + \
 744                                 decode_fs_locations_maxsz + \
 745                                 decode_renew_maxsz)
 746#define NFS4_enc_secinfo_sz     (compound_encode_hdr_maxsz + \
 747                                encode_sequence_maxsz + \
 748                                encode_putfh_maxsz + \
 749                                encode_secinfo_maxsz)
 750#define NFS4_dec_secinfo_sz     (compound_decode_hdr_maxsz + \
 751                                decode_sequence_maxsz + \
 752                                decode_putfh_maxsz + \
 753                                decode_secinfo_maxsz)
 754#define NFS4_enc_fsid_present_sz \
 755                                (compound_encode_hdr_maxsz + \
 756                                 encode_sequence_maxsz + \
 757                                 encode_putfh_maxsz + \
 758                                 encode_getfh_maxsz + \
 759                                 encode_renew_maxsz)
 760#define NFS4_dec_fsid_present_sz \
 761                                (compound_decode_hdr_maxsz + \
 762                                 decode_sequence_maxsz + \
 763                                 decode_putfh_maxsz + \
 764                                 decode_getfh_maxsz + \
 765                                 decode_renew_maxsz)
 766#if defined(CONFIG_NFS_V4_1)
 767#define NFS4_enc_bind_conn_to_session_sz \
 768                                (compound_encode_hdr_maxsz + \
 769                                 encode_bind_conn_to_session_maxsz)
 770#define NFS4_dec_bind_conn_to_session_sz \
 771                                (compound_decode_hdr_maxsz + \
 772                                 decode_bind_conn_to_session_maxsz)
 773#define NFS4_enc_exchange_id_sz \
 774                                (compound_encode_hdr_maxsz + \
 775                                 encode_exchange_id_maxsz)
 776#define NFS4_dec_exchange_id_sz \
 777                                (compound_decode_hdr_maxsz + \
 778                                 decode_exchange_id_maxsz)
 779#define NFS4_enc_create_session_sz \
 780                                (compound_encode_hdr_maxsz + \
 781                                 encode_create_session_maxsz)
 782#define NFS4_dec_create_session_sz \
 783                                (compound_decode_hdr_maxsz + \
 784                                 decode_create_session_maxsz)
 785#define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
 786                                         encode_destroy_session_maxsz)
 787#define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
 788                                         decode_destroy_session_maxsz)
 789#define NFS4_enc_destroy_clientid_sz    (compound_encode_hdr_maxsz + \
 790                                         encode_destroy_clientid_maxsz)
 791#define NFS4_dec_destroy_clientid_sz    (compound_decode_hdr_maxsz + \
 792                                         decode_destroy_clientid_maxsz)
 793#define NFS4_enc_sequence_sz \
 794                                (compound_decode_hdr_maxsz + \
 795                                 encode_sequence_maxsz)
 796#define NFS4_dec_sequence_sz \
 797                                (compound_decode_hdr_maxsz + \
 798                                 decode_sequence_maxsz)
 799#define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
 800                                         encode_sequence_maxsz + \
 801                                         encode_putrootfh_maxsz + \
 802                                         encode_fsinfo_maxsz)
 803#define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
 804                                         decode_sequence_maxsz + \
 805                                         decode_putrootfh_maxsz + \
 806                                         decode_fsinfo_maxsz)
 807#define NFS4_enc_reclaim_complete_sz    (compound_encode_hdr_maxsz + \
 808                                         encode_sequence_maxsz + \
 809                                         encode_reclaim_complete_maxsz)
 810#define NFS4_dec_reclaim_complete_sz    (compound_decode_hdr_maxsz + \
 811                                         decode_sequence_maxsz + \
 812                                         decode_reclaim_complete_maxsz)
 813#define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
 814                                encode_sequence_maxsz +\
 815                                encode_getdeviceinfo_maxsz)
 816#define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
 817                                decode_sequence_maxsz + \
 818                                decode_getdeviceinfo_maxsz)
 819#define NFS4_enc_layoutget_sz   (compound_encode_hdr_maxsz + \
 820                                encode_sequence_maxsz + \
 821                                encode_putfh_maxsz +        \
 822                                encode_layoutget_maxsz)
 823#define NFS4_dec_layoutget_sz   (compound_decode_hdr_maxsz + \
 824                                decode_sequence_maxsz + \
 825                                decode_putfh_maxsz +        \
 826                                decode_layoutget_maxsz)
 827#define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
 828                                encode_sequence_maxsz +\
 829                                encode_putfh_maxsz + \
 830                                encode_layoutcommit_maxsz + \
 831                                encode_getattr_maxsz)
 832#define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
 833                                decode_sequence_maxsz + \
 834                                decode_putfh_maxsz + \
 835                                decode_layoutcommit_maxsz + \
 836                                decode_getattr_maxsz)
 837#define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
 838                                encode_sequence_maxsz + \
 839                                encode_putfh_maxsz + \
 840                                encode_layoutreturn_maxsz)
 841#define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
 842                                decode_sequence_maxsz + \
 843                                decode_putfh_maxsz + \
 844                                decode_layoutreturn_maxsz)
 845#define NFS4_enc_secinfo_no_name_sz     (compound_encode_hdr_maxsz + \
 846                                        encode_sequence_maxsz + \
 847                                        encode_putrootfh_maxsz +\
 848                                        encode_secinfo_no_name_maxsz)
 849#define NFS4_dec_secinfo_no_name_sz     (compound_decode_hdr_maxsz + \
 850                                        decode_sequence_maxsz + \
 851                                        decode_putrootfh_maxsz + \
 852                                        decode_secinfo_no_name_maxsz)
 853#define NFS4_enc_test_stateid_sz        (compound_encode_hdr_maxsz + \
 854                                         encode_sequence_maxsz + \
 855                                         encode_test_stateid_maxsz)
 856#define NFS4_dec_test_stateid_sz        (compound_decode_hdr_maxsz + \
 857                                         decode_sequence_maxsz + \
 858                                         decode_test_stateid_maxsz)
 859#define NFS4_enc_free_stateid_sz        (compound_encode_hdr_maxsz + \
 860                                         encode_sequence_maxsz + \
 861                                         encode_free_stateid_maxsz)
 862#define NFS4_dec_free_stateid_sz        (compound_decode_hdr_maxsz + \
 863                                         decode_sequence_maxsz + \
 864                                         decode_free_stateid_maxsz)
 865
 866const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 867                                      compound_encode_hdr_maxsz +
 868                                      encode_sequence_maxsz +
 869                                      encode_putfh_maxsz +
 870                                      encode_getattr_maxsz) *
 871                                     XDR_UNIT);
 872
 873const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 874                                     compound_decode_hdr_maxsz +
 875                                     decode_sequence_maxsz +
 876                                     decode_putfh_maxsz) *
 877                                    XDR_UNIT);
 878
 879const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH +
 880                                           compound_decode_hdr_maxsz +
 881                                           decode_sequence_maxsz) *
 882                                          XDR_UNIT);
 883EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead);
 884#endif /* CONFIG_NFS_V4_1 */
 885
 886static const umode_t nfs_type2fmt[] = {
 887        [NF4BAD] = 0,
 888        [NF4REG] = S_IFREG,
 889        [NF4DIR] = S_IFDIR,
 890        [NF4BLK] = S_IFBLK,
 891        [NF4CHR] = S_IFCHR,
 892        [NF4LNK] = S_IFLNK,
 893        [NF4SOCK] = S_IFSOCK,
 894        [NF4FIFO] = S_IFIFO,
 895        [NF4ATTRDIR] = 0,
 896        [NF4NAMEDATTR] = 0,
 897};
 898
 899struct compound_hdr {
 900        int32_t         status;
 901        uint32_t        nops;
 902        __be32 *        nops_p;
 903        uint32_t        taglen;
 904        char *          tag;
 905        uint32_t        replen;         /* expected reply words */
 906        u32             minorversion;
 907};
 908
 909static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
 910{
 911        __be32 *p = xdr_reserve_space(xdr, nbytes);
 912        BUG_ON(!p);
 913        return p;
 914}
 915
 916static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
 917{
 918        __be32 *p;
 919
 920        p = xdr_reserve_space(xdr, len);
 921        xdr_encode_opaque_fixed(p, buf, len);
 922}
 923
 924static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 925{
 926        __be32 *p;
 927
 928        p = reserve_space(xdr, 4 + len);
 929        xdr_encode_opaque(p, str, len);
 930}
 931
 932static void encode_uint32(struct xdr_stream *xdr, u32 n)
 933{
 934        __be32 *p;
 935
 936        p = reserve_space(xdr, 4);
 937        *p = cpu_to_be32(n);
 938}
 939
 940static void encode_uint64(struct xdr_stream *xdr, u64 n)
 941{
 942        __be32 *p;
 943
 944        p = reserve_space(xdr, 8);
 945        xdr_encode_hyper(p, n);
 946}
 947
 948static void encode_nfs4_seqid(struct xdr_stream *xdr,
 949                const struct nfs_seqid *seqid)
 950{
 951        if (seqid != NULL)
 952                encode_uint32(xdr, seqid->sequence->counter);
 953        else
 954                encode_uint32(xdr, 0);
 955}
 956
 957static void encode_compound_hdr(struct xdr_stream *xdr,
 958                                struct rpc_rqst *req,
 959                                struct compound_hdr *hdr)
 960{
 961        __be32 *p;
 962        struct rpc_auth *auth = req->rq_cred->cr_auth;
 963
 964        /* initialize running count of expected bytes in reply.
 965         * NOTE: the replied tag SHOULD be the same is the one sent,
 966         * but this is not required as a MUST for the server to do so. */
 967        hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
 968
 969        WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
 970        encode_string(xdr, hdr->taglen, hdr->tag);
 971        p = reserve_space(xdr, 8);
 972        *p++ = cpu_to_be32(hdr->minorversion);
 973        hdr->nops_p = p;
 974        *p = cpu_to_be32(hdr->nops);
 975}
 976
 977static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
 978                uint32_t replen,
 979                struct compound_hdr *hdr)
 980{
 981        encode_uint32(xdr, op);
 982        hdr->nops++;
 983        hdr->replen += replen;
 984}
 985
 986static void encode_nops(struct compound_hdr *hdr)
 987{
 988        WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
 989        *hdr->nops_p = htonl(hdr->nops);
 990}
 991
 992static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
 993{
 994        encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
 995}
 996
 997static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 998{
 999        encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
1000}

1001
1002static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
1003                                const struct nfs4_label *label,
1004                                const struct nfs_server *server)
1005{
1006        char owner_name[IDMAP_NAMESZ];
1007        char owner_group[IDMAP_NAMESZ];
1008        int owner_namelen = 0;
1009        int owner_grouplen = 0;
1010        __be32 *p;
1011        unsigned i;
1012        uint32_t len = 0;
1013        uint32_t bmval_len;
1014        uint32_t bmval[3] = { 0 };
1015
1016        /*
1017         * We reserve enough space to write the entire attribute buffer at once.
1018         * In the worst-case, this would be
1019         * 16(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
1020         * = 40 bytes, plus any contribution from variable-length fields
1021         *            such as owner/group.
1022         */
1023        if (iap->ia_valid & ATTR_SIZE) {
1024                bmval[0] |= FATTR4_WORD0_SIZE;
1025                len += 8;
1026        }
1027        if (iap->ia_valid & ATTR_MODE) {
1028                bmval[1] |= FATTR4_WORD1_MODE;
1029                len += 4;
1030        }
1031        if (iap->ia_valid & ATTR_UID) {
1032                owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1033                if (owner_namelen < 0) {
1034                        dprintk("nfs: couldn't resolve uid %d to string\n",
1035                                        from_kuid(&init_user_ns, iap->ia_uid));
1036                        /* XXX */
1037                        strcpy(owner_name, "nobody");
1038                        owner_namelen = sizeof("nobody") - 1;
1039                        /* goto out; */
1040                }
1041                bmval[1] |= FATTR4_WORD1_OWNER;
1042                len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1043        }
1044        if (iap->ia_valid & ATTR_GID) {
1045                owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1046                if (owner_grouplen < 0) {
1047                        dprintk("nfs: couldn't resolve gid %d to string\n",
1048                                        from_kgid(&init_user_ns, iap->ia_gid));
1049                        strcpy(owner_group, "nobody");
1050                        owner_grouplen = sizeof("nobody") - 1;
1051                        /* goto out; */
1052                }
1053                bmval[1] |= FATTR4_WORD1_OWNER_GROUP;
1054                len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1055        }
1056        if (iap->ia_valid & ATTR_ATIME_SET) {
1057                bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1058                len += 16;
1059        } else if (iap->ia_valid & ATTR_ATIME) {
1060                bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1061                len += 4;
1062        }
1063        if (iap->ia_valid & ATTR_MTIME_SET) {
1064                bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1065                len += 16;
1066        } else if (iap->ia_valid & ATTR_MTIME) {
1067                bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1068                len += 4;
1069        }
1070        if (label) {
1071                len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1072                bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
1073        }
1074
1075        if (bmval[2] != 0)
1076                bmval_len = 3;
1077        else if (bmval[1] != 0)
1078                bmval_len = 2;
1079        else
1080                bmval_len = 1;
1081
1082        p = reserve_space(xdr, 4 + (bmval_len << 2) + 4 + len);
1083
1084        *p++ = cpu_to_be32(bmval_len);
1085        for (i = 0; i < bmval_len; i++)
1086                *p++ = cpu_to_be32(bmval[i]);
1087        *p++ = cpu_to_be32(len);
1088
1089        if (bmval[0] & FATTR4_WORD0_SIZE)
1090                p = xdr_encode_hyper(p, iap->ia_size);
1091        if (bmval[1] & FATTR4_WORD1_MODE)
1092                *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1093        if (bmval[1] & FATTR4_WORD1_OWNER)
1094                p = xdr_encode_opaque(p, owner_name, owner_namelen);
1095        if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
1096                p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1097        if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1098                if (iap->ia_valid & ATTR_ATIME_SET) {
1099                        *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1100                        p = xdr_encode_hyper(p, (s64)iap->ia_atime.tv_sec);
1101                        *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
1102                } else
1103                        *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1104        }
1105        if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1106                if (iap->ia_valid & ATTR_MTIME_SET) {
1107                        *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1108                        p = xdr_encode_hyper(p, (s64)iap->ia_mtime.tv_sec);
1109                        *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1110                } else
1111                        *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1112        }
1113        if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
1114                *p++ = cpu_to_be32(label->lfs);
1115                *p++ = cpu_to_be32(label->pi);
1116                *p++ = cpu_to_be32(label->len);
1117                p = xdr_encode_opaque_fixed(p, label->label, label->len);
1118        }
1119
1120/* out: */
1121}
1122
1123static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1124{
1125        encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1126        encode_uint32(xdr, access);
1127}
1128
1129static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1130{
1131        encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1132        encode_nfs4_seqid(xdr, arg->seqid);
1133        encode_nfs4_stateid(xdr, &arg->stateid);
1134}
1135
1136static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1137{
1138        __be32 *p;
1139
1140        encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1141        p = reserve_space(xdr, 12);
1142        p = xdr_encode_hyper(p, args->offset);
1143        *p = cpu_to_be32(args->count);
1144}
1145
1146static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1147{
1148        __be32 *p;
1149
1150        encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1151        encode_uint32(xdr, create->ftype);
1152
1153        switch (create->ftype) {
1154        case NF4LNK:
1155                p = reserve_space(xdr, 4);
1156                *p = cpu_to_be32(create->u.symlink.len);
1157                xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
1158                break;
1159
1160        case NF4BLK: case NF4CHR:
1161                p = reserve_space(xdr, 8);
1162                *p++ = cpu_to_be32(create->u.device.specdata1);
1163                *p = cpu_to_be32(create->u.device.specdata2);
1164                break;
1165
1166        default:
1167                break;
1168        }
1169
1170        encode_string(xdr, create->name->len, create->name->name);
1171        encode_attrs(xdr, create->attrs, create->label, create->server);
1172}
1173
1174static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1175{
1176        __be32 *p;
1177
1178        encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1179        p = reserve_space(xdr, 8);
1180        *p++ = cpu_to_be32(1);
1181        *p = cpu_to_be32(bitmap);
1182}
1183
1184static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1185{
1186        __be32 *p;
1187
1188        encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1189        p = reserve_space(xdr, 12);
1190        *p++ = cpu_to_be32(2);
1191        *p++ = cpu_to_be32(bm0);
1192        *p = cpu_to_be32(bm1);
1193}
1194
1195static void
1196encode_getattr_three(struct xdr_stream *xdr,
1197                     uint32_t bm0, uint32_t bm1, uint32_t bm2,
1198                     struct compound_hdr *hdr)
1199{
1200        __be32 *p;
1201
1202        encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1203        if (bm2) {
1204                p = reserve_space(xdr, 16);
1205                *p++ = cpu_to_be32(3);
1206                *p++ = cpu_to_be32(bm0);
1207                *p++ = cpu_to_be32(bm1);
1208                *p = cpu_to_be32(bm2);
1209        } else if (bm1) {
1210                p = reserve_space(xdr, 12);
1211                *p++ = cpu_to_be32(2);
1212                *p++ = cpu_to_be32(bm0);
1213                *p = cpu_to_be32(bm1);
1214        } else {
1215                p = reserve_space(xdr, 8);
1216                *p++ = cpu_to_be32(1);
1217                *p = cpu_to_be32(bm0);
1218        }
1219}
1220
1221static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1222{
1223        encode_getattr_three(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1224                           bitmask[1] & nfs4_fattr_bitmap[1],
1225                           bitmask[2] & nfs4_fattr_bitmap[2],
1226                           hdr);
1227}
1228
1229static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1230                                 const u32 *open_bitmap,
1231                                 struct compound_hdr *hdr)
1232{
1233        encode_getattr_three(xdr,
1234                             bitmask[0] & open_bitmap[0],
1235                             bitmask[1] & open_bitmap[1],
1236                             bitmask[2] & open_bitmap[2],
1237                             hdr);
1238}
1239
1240static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1241{
1242        encode_getattr_three(xdr,
1243                             bitmask[0] & nfs4_fsinfo_bitmap[0],
1244                             bitmask[1] & nfs4_fsinfo_bitmap[1],
1245                             bitmask[2] & nfs4_fsinfo_bitmap[2],
1246                             hdr);
1247}
1248
1249static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1250{
1251        encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1252                           bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1253}
1254
1255static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1256{
1257        encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1258}
1259
1260static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1261{
1262        encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1263        encode_string(xdr, name->len, name->name);
1264}
1265
1266static inline int nfs4_lock_type(struct file_lock *fl, int block)
1267{
1268        if (fl->fl_type == F_RDLCK)
1269                return block ? NFS4_READW_LT : NFS4_READ_LT;
1270        return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1271}
1272
1273static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1274{
1275        if (fl->fl_end == OFFSET_MAX)
1276                return ~(uint64_t)0;
1277        return fl->fl_end - fl->fl_start + 1;
1278}
1279
1280static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1281{
1282        __be32 *p;
1283
1284        p = reserve_space(xdr, 32);
1285        p = xdr_encode_hyper(p, lowner->clientid);
1286        *p++ = cpu_to_be32(20);
1287        p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1288        *p++ = cpu_to_be32(lowner->s_dev);
1289        xdr_encode_hyper(p, lowner->id);
1290}
1291
1292/*
1293 * opcode,type,reclaim,offset,length,new_lock_owner = 32
1294 * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1295 */
1296static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1297{
1298        __be32 *p;
1299
1300        encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1301        p = reserve_space(xdr, 28);
1302        *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1303        *p++ = cpu_to_be32(args->reclaim);
1304        p = xdr_encode_hyper(p, args->fl->fl_start);
1305        p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1306        *p = cpu_to_be32(args->new_lock_owner);
1307        if (args->new_lock_owner){
1308                encode_nfs4_seqid(xdr, args->open_seqid);
1309                encode_nfs4_stateid(xdr, &args->open_stateid);
1310                encode_nfs4_seqid(xdr, args->lock_seqid);
1311                encode_lockowner(xdr, &args->lock_owner);
1312        }
1313        else {
1314                encode_nfs4_stateid(xdr, &args->lock_stateid);
1315                encode_nfs4_seqid(xdr, args->lock_seqid);
1316        }
1317}
1318
1319static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1320{
1321        __be32 *p;
1322
1323        encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1324        p = reserve_space(xdr, 20);
1325        *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1326        p = xdr_encode_hyper(p, args->fl->fl_start);
1327        p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1328        encode_lockowner(xdr, &args->lock_owner);
1329}
1330
1331static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1332{
1333        __be32 *p;
1334
1335        encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1336        encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1337        encode_nfs4_seqid(xdr, args->seqid);
1338        encode_nfs4_stateid(xdr, &args->stateid);
1339        p = reserve_space(xdr, 16);
1340        p = xdr_encode_hyper(p, args->fl->fl_start);
1341        xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1342}
1343
1344static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1345{
1346        encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1347        encode_lockowner(xdr, lowner);
1348}
1349
1350static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1351{
1352        encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1353        encode_string(xdr, name->len, name->name);
1354}
1355
1356static void encode_share_access(struct xdr_stream *xdr, u32 share_access)
1357{
1358        __be32 *p;
1359
1360        p = reserve_space(xdr, 8);
1361        *p++ = cpu_to_be32(share_access);
1362        *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1363}
1364
1365static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1366{
1367        __be32 *p;
1368 /*
1369 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1370 * owner 4 = 32
1371 */
1372        encode_nfs4_seqid(xdr, arg->seqid);
1373        encode_share_access(xdr, arg->share_access);
1374        p = reserve_space(xdr, 36);
1375        p = xdr_encode_hyper(p, arg->clientid);
1376        *p++ = cpu_to_be32(24);
1377        p = xdr_encode_opaque_fixed(p, "open id:", 8);
1378        *p++ = cpu_to_be32(arg->server->s_dev);
1379        *p++ = cpu_to_be32(arg->id.uniquifier);
1380        xdr_encode_hyper(p, arg->id.create_time);
1381}
1382
1383static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1384{
1385        struct iattr dummy;
1386        __be32 *p;
1387
1388        p = reserve_space(xdr, 4);
1389        switch(arg->createmode) {
1390        case NFS4_CREATE_UNCHECKED:
1391                *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1392                encode_attrs(xdr, arg->u.attrs, arg->label, arg->server);
1393                break;
1394        case NFS4_CREATE_GUARDED:
1395                *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1396                encode_attrs(xdr, arg->u.attrs, arg->label, arg->server);
1397                break;
1398        case NFS4_CREATE_EXCLUSIVE:
1399                *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1400                encode_nfs4_verifier(xdr, &arg->u.verifier);
1401                break;
1402        case NFS4_CREATE_EXCLUSIVE4_1:
1403                *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1404                encode_nfs4_verifier(xdr, &arg->u.verifier);
1405                dummy.ia_valid = 0;
1406                encode_attrs(xdr, &dummy, arg->label, arg->server);
1407        }
1408}
1409
1410static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1411{
1412        __be32 *p;
1413
1414        p = reserve_space(xdr, 4);
1415        switch (arg->open_flags & O_CREAT) {
1416        case 0:
1417                *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1418                break;
1419        default:
1420                *p = cpu_to_be32(NFS4_OPEN_CREATE);
1421                encode_createmode(xdr, arg);
1422        }
1423}
1424
1425static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1426{
1427        __be32 *p;
1428
1429        p = reserve_space(xdr, 4);
1430        switch (delegation_type) {
1431        case 0:
1432                *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1433                break;
1434        case FMODE_READ:
1435                *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1436                break;
1437        case FMODE_WRITE|FMODE_READ:
1438                *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1439                break;
1440        default:
1441                BUG();
1442        }
1443}
1444
1445static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1446{
1447        __be32 *p;
1448
1449        p = reserve_space(xdr, 4);
1450        *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1451        encode_string(xdr, name->len, name->name);
1452}
1453
1454static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1455{
1456        __be32 *p;
1457
1458        p = reserve_space(xdr, 4);
1459        *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1460        encode_delegation_type(xdr, type);
1461}
1462
1463static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1464{
1465        __be32 *p;
1466
1467        p = reserve_space(xdr, 4);
1468        *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1469        encode_nfs4_stateid(xdr, stateid);
1470        encode_string(xdr, name->len, name->name);
1471}
1472
1473static inline void encode_claim_fh(struct xdr_stream *xdr)
1474{
1475        __be32 *p;
1476
1477        p = reserve_space(xdr, 4);
1478        *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1479}
1480
1481static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1482{
1483        __be32 *p;
1484
1485        p = reserve_space(xdr, 4);
1486        *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1487        encode_nfs4_stateid(xdr, stateid);
1488}
1489
1490static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1491{
1492        encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1493        encode_openhdr(xdr, arg);
1494        encode_opentype(xdr, arg);
1495        switch (arg->claim) {
1496        case NFS4_OPEN_CLAIM_NULL:
1497                encode_claim_null(xdr, arg->name);
1498                break;
1499        case NFS4_OPEN_CLAIM_PREVIOUS:
1500                encode_claim_previous(xdr, arg->u.delegation_type);
1501                break;
1502        case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1503                encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1504                break;
1505        case NFS4_OPEN_CLAIM_FH:
1506                encode_claim_fh(xdr);
1507                break;
1508        case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1509                encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1510                break;
1511        default:
1512                BUG();
1513        }
1514}
1515
1516static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1517{
1518        encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1519        encode_nfs4_stateid(xdr, arg->stateid);
1520        encode_nfs4_seqid(xdr, arg->seqid);
1521}
1522
1523static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1524{
1525        encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1526        encode_nfs4_stateid(xdr, &arg->stateid);
1527        encode_nfs4_seqid(xdr, arg->seqid);
1528        encode_share_access(xdr, arg->share_access);
1529}
1530
1531static void
1532encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1533{
1534        encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1535        encode_string(xdr, fh->size, fh->data);
1536}
1537
1538static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1539{
1540        encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1541}
1542
1543static void encode_read(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1544                        struct compound_hdr *hdr)
1545{
1546        __be32 *p;
1547
1548        encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1549        encode_nfs4_stateid(xdr, &args->stateid);
1550
1551        p = reserve_space(xdr, 12);
1552        p = xdr_encode_hyper(p, args->offset);
1553        *p = cpu_to_be32(args->count);
1554}
1555
1556static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1557{
1558        uint32_t attrs[3] = {
1559                FATTR4_WORD0_RDATTR_ERROR,
1560                FATTR4_WORD1_MOUNTED_ON_FILEID,
1561        };
1562        uint32_t dircount = readdir->count >> 1;
1563        __be32 *p, verf[2];
1564        uint32_t attrlen = 0;
1565        unsigned int i;
1566
1567        if (readdir->plus) {
1568                attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1569                        FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1570                attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1571                        FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1572                        FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1573                        FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1574                attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1575                dircount >>= 1;
1576        }
1577        /* Use mounted_on_fileid only if the server supports it */
1578        if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1579                attrs[0] |= FATTR4_WORD0_FILEID;
1580        for (i = 0; i < ARRAY_SIZE(attrs); i++) {
1581                attrs[i] &= readdir->bitmask[i];
1582                if (attrs[i] != 0)
1583                        attrlen = i+1;
1584        }
1585
1586        encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1587        encode_uint64(xdr, readdir->cookie);
1588        encode_nfs4_verifier(xdr, &readdir->verifier);
1589        p = reserve_space(xdr, 12 + (attrlen << 2));
1590        *p++ = cpu_to_be32(dircount);
1591        *p++ = cpu_to_be32(readdir->count);
1592        *p++ = cpu_to_be32(attrlen);
1593        for (i = 0; i < attrlen; i++)
1594                *p++ = cpu_to_be32(attrs[i]);
1595        memcpy(verf, readdir->verifier.data, sizeof(verf));
1596
1597        dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1598                        __func__,
1599                        (unsigned long long)readdir->cookie,
1600                        verf[0], verf[1],
1601                        attrs[0] & readdir->bitmask[0],
1602                        attrs[1] & readdir->bitmask[1],
1603                        attrs[2] & readdir->bitmask[2]);
1604}
1605
1606static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1607{
1608        encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1609}
1610
1611static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1612{
1613        encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1614        encode_string(xdr, name->len, name->name);
1615}
1616
1617static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1618{
1619        encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1620        encode_string(xdr, oldname->len, oldname->name);
1621        encode_string(xdr, newname->len, newname->name);
1622}
1623
1624static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1625                         struct compound_hdr *hdr)
1626{
1627        encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1628        encode_uint64(xdr, clid);
1629}
1630
1631static void
1632encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1633{
1634        encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1635}
1636
1637static void
1638encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1639{
1640        __be32 *p;
1641
1642        encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1643        encode_nfs4_stateid(xdr, &zero_stateid);
1644        p = reserve_space(xdr, 2*4);
1645        *p++ = cpu_to_be32(1);
1646        *p = cpu_to_be32(FATTR4_WORD0_ACL);
1647        p = reserve_space(xdr, 4);
1648        *p = cpu_to_be32(arg->acl_len);
1649        xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1650}
1651
1652static void
1653encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1654{
1655        encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1656}
1657
1658static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1659{
1660        encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1661        encode_nfs4_stateid(xdr, &arg->stateid);
1662        encode_attrs(xdr, arg->iap, arg->label, server);
1663}
1664
1665static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1666{
1667        __be32 *p;
1668
1669        encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1670        encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1671
1672        encode_string(xdr, strlen(setclientid->sc_clnt->cl_owner_id),
1673                        setclientid->sc_clnt->cl_owner_id);
1674        p = reserve_space(xdr, 4);
1675        *p = cpu_to_be32(setclientid->sc_prog);
1676        encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1677        encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1678        p = reserve_space(xdr, 4);
1679        *p = cpu_to_be32(setclientid->sc_clnt->cl_cb_ident);
1680}
1681
1682static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1683{
1684        encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1685                        decode_setclientid_confirm_maxsz, hdr);
1686        encode_uint64(xdr, arg->clientid);
1687        encode_nfs4_verifier(xdr, &arg->confirm);
1688}
1689
1690static void encode_write(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1691                         struct compound_hdr *hdr)
1692{
1693        __be32 *p;
1694
1695        encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1696        encode_nfs4_stateid(xdr, &args->stateid);
1697
1698        p = reserve_space(xdr, 16);
1699        p = xdr_encode_hyper(p, args->offset);
1700        *p++ = cpu_to_be32(args->stable);
1701        *p = cpu_to_be32(args->count);
1702
1703        xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1704}
1705
1706static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1707{
1708        encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1709        encode_nfs4_stateid(xdr, stateid);
1710}
1711
1712static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1713{
1714        encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1715        encode_string(xdr, name->len, name->name);
1716}
1717
1718#if defined(CONFIG_NFS_V4_1)
1719/* NFSv4.1 operations */
1720static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1721                                   struct nfs41_bind_conn_to_session_args *args,
1722                                   struct compound_hdr *hdr)
1723{
1724        __be32 *p;
1725
1726        encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1727                decode_bind_conn_to_session_maxsz, hdr);
1728        encode_opaque_fixed(xdr, args->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1729        p = xdr_reserve_space(xdr, 8);
1730        *p++ = cpu_to_be32(args->dir);
1731        *p = (args->use_conn_in_rdma_mode) ? cpu_to_be32(1) : cpu_to_be32(0);
1732}
1733
1734static void encode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
1735{
1736        unsigned int i;
1737        encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
1738        for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
1739                encode_uint32(xdr, op_map->u.words[i]);
1740}
1741
1742static void encode_exchange_id(struct xdr_stream *xdr,
1743                               struct nfs41_exchange_id_args *args,
1744                               struct compound_hdr *hdr)
1745{
1746        __be32 *p;
1747        char impl_name[IMPL_NAME_LIMIT];
1748        int len = 0;
1749
1750        encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1751        encode_nfs4_verifier(xdr, args->verifier);
1752
1753        encode_string(xdr, strlen(args->client->cl_owner_id),
1754                        args->client->cl_owner_id);
1755
1756        encode_uint32(xdr, args->flags);
1757        encode_uint32(xdr, args->state_protect.how);
1758
1759        switch (args->state_protect.how) {
1760        case SP4_NONE:
1761                break;
1762        case SP4_MACH_CRED:
1763                encode_op_map(xdr, &args->state_protect.enforce);
1764                encode_op_map(xdr, &args->state_protect.allow);
1765                break;
1766        default:
1767                WARN_ON_ONCE(1);
1768                break;
1769        }
1770
1771        if (send_implementation_id &&
1772            sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1773            sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1774                <= sizeof(impl_name) + 1)
1775                len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1776                               utsname()->sysname, utsname()->release,
1777                               utsname()->version, utsname()->machine);
1778
1779        if (len > 0) {
1780                encode_uint32(xdr, 1);  /* implementation id array length=1 */
1781
1782                encode_string(xdr,
1783                        sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1784                        CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1785                encode_string(xdr, len, impl_name);
1786                /* just send zeros for nii_date - the date is in nii_name */
1787                p = reserve_space(xdr, 12);
1788                p = xdr_encode_hyper(p, 0);
1789                *p = cpu_to_be32(0);
1790        } else
1791                encode_uint32(xdr, 0);  /* implementation id array length=0 */
1792}
1793
1794static void encode_create_session(struct xdr_stream *xdr,
1795                                  struct nfs41_create_session_args *args,
1796                                  struct compound_hdr *hdr)
1797{
1798        __be32 *p;
1799        struct nfs_client *clp = args->client;
1800        struct rpc_clnt *clnt = clp->cl_rpcclient;
1801        struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1802        u32 max_resp_sz_cached;
1803
1804        /*
1805         * Assumes OPEN is the biggest non-idempotent compound.
1806         * 2 is the verifier.
1807         */
1808        max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1809                              RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1810
1811        encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1812        p = reserve_space(xdr, 16 + 2*28 + 20 + clnt->cl_nodelen + 12);
1813        p = xdr_encode_hyper(p, args->clientid);
1814        *p++ = cpu_to_be32(args->seqid);                        /*Sequence id */
1815        *p++ = cpu_to_be32(args->flags);                        /*flags */
1816
1817        /* Fore Channel */
1818        *p++ = cpu_to_be32(0);                          /* header padding size */
1819        *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1820        *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1821        *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1822        *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1823        *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1824        *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1825
1826        /* Back Channel */
1827        *p++ = cpu_to_be32(0);                          /* header padding size */
1828        *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1829        *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1830        *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1831        *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1832        *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1833        *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1834
1835        *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1836        *p++ = cpu_to_be32(1);
1837        *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1838
1839        /* authsys_parms rfc1831 */
1840        *p++ = cpu_to_be32(nn->boot_time.tv_nsec);      /* stamp */
1841        p = xdr_encode_array(p, clnt->cl_nodename, clnt->cl_nodelen);
1842        *p++ = cpu_to_be32(0);                          /* UID */
1843        *p++ = cpu_to_be32(0);                          /* GID */
1844        *p = cpu_to_be32(0);                            /* No more gids */
1845}
1846
1847static void encode_destroy_session(struct xdr_stream *xdr,
1848                                   struct nfs4_session *session,
1849                                   struct compound_hdr *hdr)
1850{
1851        encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1852        encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1853}
1854
1855static void encode_destroy_clientid(struct xdr_stream *xdr,
1856                                   uint64_t clientid,
1857                                   struct compound_hdr *hdr)
1858{
1859        encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1860        encode_uint64(xdr, clientid);
1861}
1862
1863static void encode_reclaim_complete(struct xdr_stream *xdr,
1864                                    struct nfs41_reclaim_complete_args *args,
1865                                    struct compound_hdr *hdr)
1866{
1867        encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1868        encode_uint32(xdr, args->one_fs);
1869}
1870#endif /* CONFIG_NFS_V4_1 */
1871
1872static void encode_sequence(struct xdr_stream *xdr,
1873                            const struct nfs4_sequence_args *args,
1874                            struct compound_hdr *hdr)
1875{
1876#if defined(CONFIG_NFS_V4_1)
1877        struct nfs4_session *session;
1878        struct nfs4_slot_table *tp;
1879        struct nfs4_slot *slot = args->sa_slot;
1880        __be32 *p;
1881
1882        tp = slot->table;
1883        session = tp->session;
1884        if (!session)
1885                return;
1886
1887        encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1888
1889        /*
1890         * Sessionid + seqid + slotid + max slotid + cache_this
1891         */
1892        dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1893                "max_slotid=%d cache_this=%d\n",
1894                __func__,
1895                ((u32 *)session->sess_id.data)[0],
1896                ((u32 *)session->sess_id.data)[1],
1897                ((u32 *)session->sess_id.data)[2],
1898                ((u32 *)session->sess_id.data)[3],
1899                slot->seq_nr, slot->slot_nr,
1900                tp->highest_used_slotid, args->sa_cache_this);
1901        p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1902        p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1903        *p++ = cpu_to_be32(slot->seq_nr);
1904        *p++ = cpu_to_be32(slot->slot_nr);
1905        *p++ = cpu_to_be32(tp->highest_used_slotid);
1906        *p = cpu_to_be32(args->sa_cache_this);
1907#endif /* CONFIG_NFS_V4_1 */
1908}
1909
1910#ifdef CONFIG_NFS_V4_1
1911static void
1912encode_getdeviceinfo(struct xdr_stream *xdr,
1913                     const struct nfs4_getdeviceinfo_args *args,
1914                     struct compound_hdr *hdr)
1915{
1916        __be32 *p;
1917
1918        encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1919        p = reserve_space(xdr, NFS4_DEVICEID4_SIZE + 4 + 4);
1920        p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1921                                    NFS4_DEVICEID4_SIZE);
1922        *p++ = cpu_to_be32(args->pdev->layout_type);
1923        *p++ = cpu_to_be32(args->pdev->maxcount);       /* gdia_maxcount */
1924
1925        p = reserve_space(xdr, 4 + 4);
1926        *p++ = cpu_to_be32(1);                  /* bitmap length */
1927        *p++ = cpu_to_be32(args->notify_types);
1928}
1929
1930static void
1931encode_layoutget(struct xdr_stream *xdr,
1932                      const struct nfs4_layoutget_args *args,
1933                      struct compound_hdr *hdr)
1934{
1935        __be32 *p;
1936
1937        encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1938        p = reserve_space(xdr, 36);
1939        *p++ = cpu_to_be32(0);     /* Signal layout available */
1940        *p++ = cpu_to_be32(args->type);
1941        *p++ = cpu_to_be32(args->range.iomode);
1942        p = xdr_encode_hyper(p, args->range.offset);
1943        p = xdr_encode_hyper(p, args->range.length);
1944        p = xdr_encode_hyper(p, args->minlength);
1945        encode_nfs4_stateid(xdr, &args->stateid);
1946        encode_uint32(xdr, args->maxcount);
1947
1948        dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1949                __func__,
1950                args->type,
1951                args->range.iomode,
1952                (unsigned long)args->range.offset,
1953                (unsigned long)args->range.length,
1954                args->maxcount);
1955}
1956
1957static int
1958encode_layoutcommit(struct xdr_stream *xdr,
1959                    struct inode *inode,
1960                    struct nfs4_layoutcommit_args *args,
1961                    struct compound_hdr *hdr)
1962{
1963        __be32 *p;
1964
1965        dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1966                NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1967
1968        encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
1969        p = reserve_space(xdr, 20);
1970        /* Only whole file layouts */
1971        p = xdr_encode_hyper(p, 0); /* offset */
1972        p = xdr_encode_hyper(p, args->lastbytewritten + 1);     /* length */
1973        *p = cpu_to_be32(0); /* reclaim */
1974        encode_nfs4_stateid(xdr, &args->stateid);
1975        p = reserve_space(xdr, 20);
1976        *p++ = cpu_to_be32(1); /* newoffset = TRUE */
1977        p = xdr_encode_hyper(p, args->lastbytewritten);
1978        *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
1979        *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
1980
1981        if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit) {
1982                NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
1983                        NFS_I(inode)->layout, xdr, args);
1984        } else {
1985                encode_uint32(xdr, args->layoutupdate_len);
1986                if (args->layoutupdate_pages) {
1987                        xdr_write_pages(xdr, args->layoutupdate_pages, 0,
1988                                        args->layoutupdate_len);
1989                }
1990        }
1991
1992        return 0;
1993}
1994
1995static void
1996encode_layoutreturn(struct xdr_stream *xdr,
1997                    const struct nfs4_layoutreturn_args *args,
1998                    struct compound_hdr *hdr)
1999{
2000        __be32 *p;

2001
2002        encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2003        p = reserve_space(xdr, 16);
2004        *p++ = cpu_to_be32(0);          /* reclaim. always 0 for now */
2005        *p++ = cpu_to_be32(args->layout_type);
2006        *p++ = cpu_to_be32(args->range.iomode);
2007        *p = cpu_to_be32(RETURN_FILE);
2008        p = reserve_space(xdr, 16);
2009        p = xdr_encode_hyper(p, args->range.offset);
2010        p = xdr_encode_hyper(p, args->range.length);
2011        spin_lock(&args->inode->i_lock);
2012        encode_nfs4_stateid(xdr, &args->stateid);
2013        spin_unlock(&args->inode->i_lock);
2014        if (NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn) {
2015                NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn(
2016                        NFS_I(args->inode)->layout, xdr, args);
2017        } else
2018                encode_uint32(xdr, 0);
2019}
2020
2021static int
2022encode_secinfo_no_name(struct xdr_stream *xdr,
2023                       const struct nfs41_secinfo_no_name_args *args,
2024                       struct compound_hdr *hdr)
2025{
2026        encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2027        encode_uint32(xdr, args->style);
2028        return 0;
2029}
2030
2031static void encode_test_stateid(struct xdr_stream *xdr,
2032                                struct nfs41_test_stateid_args *args,
2033                                struct compound_hdr *hdr)
2034{
2035        encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2036        encode_uint32(xdr, 1);
2037        encode_nfs4_stateid(xdr, args->stateid);
2038}
2039
2040static void encode_free_stateid(struct xdr_stream *xdr,
2041                                struct nfs41_free_stateid_args *args,
2042                                struct compound_hdr *hdr)
2043{
2044        encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2045        encode_nfs4_stateid(xdr, &args->stateid);
2046}
2047#endif /* CONFIG_NFS_V4_1 */
2048
2049/*
2050 * END OF "GENERIC" ENCODE ROUTINES.
2051 */
2052
2053static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2054{
2055#if defined(CONFIG_NFS_V4_1)
2056        struct nfs4_session *session = args->sa_slot->table->session;
2057        if (session)
2058                return session->clp->cl_mvops->minor_version;
2059#endif /* CONFIG_NFS_V4_1 */
2060        return 0;
2061}
2062
2063/*
2064 * Encode an ACCESS request
2065 */
2066static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2067                                const struct nfs4_accessargs *args)
2068{
2069        struct compound_hdr hdr = {
2070                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2071        };
2072
2073        encode_compound_hdr(xdr, req, &hdr);
2074        encode_sequence(xdr, &args->seq_args, &hdr);
2075        encode_putfh(xdr, args->fh, &hdr);
2076        encode_access(xdr, args->access, &hdr);
2077        encode_getfattr(xdr, args->bitmask, &hdr);
2078        encode_nops(&hdr);
2079}
2080
2081/*
2082 * Encode LOOKUP request
2083 */
2084static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2085                                const struct nfs4_lookup_arg *args)
2086{
2087        struct compound_hdr hdr = {
2088                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2089        };
2090
2091        encode_compound_hdr(xdr, req, &hdr);
2092        encode_sequence(xdr, &args->seq_args, &hdr);
2093        encode_putfh(xdr, args->dir_fh, &hdr);
2094        encode_lookup(xdr, args->name, &hdr);
2095        encode_getfh(xdr, &hdr);
2096        encode_getfattr(xdr, args->bitmask, &hdr);
2097        encode_nops(&hdr);
2098}
2099
2100/*
2101 * Encode LOOKUP_ROOT request
2102 */
2103static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2104                                     struct xdr_stream *xdr,
2105                                     const struct nfs4_lookup_root_arg *args)
2106{
2107        struct compound_hdr hdr = {
2108                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2109        };
2110
2111        encode_compound_hdr(xdr, req, &hdr);
2112        encode_sequence(xdr, &args->seq_args, &hdr);
2113        encode_putrootfh(xdr, &hdr);
2114        encode_getfh(xdr, &hdr);
2115        encode_getfattr(xdr, args->bitmask, &hdr);
2116        encode_nops(&hdr);
2117}
2118
2119/*
2120 * Encode REMOVE request
2121 */
2122static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2123                                const struct nfs_removeargs *args)
2124{
2125        struct compound_hdr hdr = {
2126                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2127        };
2128
2129        encode_compound_hdr(xdr, req, &hdr);
2130        encode_sequence(xdr, &args->seq_args, &hdr);
2131        encode_putfh(xdr, args->fh, &hdr);
2132        encode_remove(xdr, &args->name, &hdr);
2133        encode_nops(&hdr);
2134}
2135
2136/*
2137 * Encode RENAME request
2138 */
2139static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2140                                const struct nfs_renameargs *args)
2141{
2142        struct compound_hdr hdr = {
2143                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2144        };
2145
2146        encode_compound_hdr(xdr, req, &hdr);
2147        encode_sequence(xdr, &args->seq_args, &hdr);
2148        encode_putfh(xdr, args->old_dir, &hdr);
2149        encode_savefh(xdr, &hdr);
2150        encode_putfh(xdr, args->new_dir, &hdr);
2151        encode_rename(xdr, args->old_name, args->new_name, &hdr);
2152        encode_nops(&hdr);
2153}
2154
2155/*
2156 * Encode LINK request
2157 */
2158static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2159                             const struct nfs4_link_arg *args)
2160{
2161        struct compound_hdr hdr = {
2162                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2163        };
2164
2165        encode_compound_hdr(xdr, req, &hdr);
2166        encode_sequence(xdr, &args->seq_args, &hdr);
2167        encode_putfh(xdr, args->fh, &hdr);
2168        encode_savefh(xdr, &hdr);
2169        encode_putfh(xdr, args->dir_fh, &hdr);
2170        encode_link(xdr, args->name, &hdr);
2171        encode_restorefh(xdr, &hdr);
2172        encode_getfattr(xdr, args->bitmask, &hdr);
2173        encode_nops(&hdr);
2174}
2175
2176/*
2177 * Encode CREATE request
2178 */
2179static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2180                                const struct nfs4_create_arg *args)
2181{
2182        struct compound_hdr hdr = {
2183                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2184        };
2185
2186        encode_compound_hdr(xdr, req, &hdr);
2187        encode_sequence(xdr, &args->seq_args, &hdr);
2188        encode_putfh(xdr, args->dir_fh, &hdr);
2189        encode_create(xdr, args, &hdr);
2190        encode_getfh(xdr, &hdr);
2191        encode_getfattr(xdr, args->bitmask, &hdr);
2192        encode_nops(&hdr);
2193}
2194
2195/*
2196 * Encode SYMLINK request
2197 */
2198static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2199                                 const struct nfs4_create_arg *args)
2200{
2201        nfs4_xdr_enc_create(req, xdr, args);
2202}
2203
2204/*
2205 * Encode GETATTR request
2206 */
2207static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2208                                 const struct nfs4_getattr_arg *args)
2209{
2210        struct compound_hdr hdr = {
2211                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2212        };
2213
2214        encode_compound_hdr(xdr, req, &hdr);
2215        encode_sequence(xdr, &args->seq_args, &hdr);
2216        encode_putfh(xdr, args->fh, &hdr);
2217        encode_getfattr(xdr, args->bitmask, &hdr);
2218        encode_nops(&hdr);
2219}
2220
2221/*
2222 * Encode a CLOSE request
2223 */
2224static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2225                               struct nfs_closeargs *args)
2226{
2227        struct compound_hdr hdr = {
2228                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2229        };
2230
2231        encode_compound_hdr(xdr, req, &hdr);
2232        encode_sequence(xdr, &args->seq_args, &hdr);
2233        encode_putfh(xdr, args->fh, &hdr);
2234        encode_close(xdr, args, &hdr);
2235        encode_getfattr(xdr, args->bitmask, &hdr);
2236        encode_nops(&hdr);
2237}
2238
2239/*
2240 * Encode an OPEN request
2241 */
2242static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2243                              struct nfs_openargs *args)
2244{
2245        struct compound_hdr hdr = {
2246                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2247        };
2248
2249        encode_compound_hdr(xdr, req, &hdr);
2250        encode_sequence(xdr, &args->seq_args, &hdr);
2251        encode_putfh(xdr, args->fh, &hdr);
2252        encode_open(xdr, args, &hdr);
2253        encode_getfh(xdr, &hdr);
2254        if (args->access)
2255                encode_access(xdr, args->access, &hdr);
2256        encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2257        encode_nops(&hdr);
2258}
2259
2260/*
2261 * Encode an OPEN_CONFIRM request
2262 */
2263static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2264                                      struct xdr_stream *xdr,
2265                                      struct nfs_open_confirmargs *args)
2266{
2267        struct compound_hdr hdr = {
2268                .nops   = 0,
2269        };
2270
2271        encode_compound_hdr(xdr, req, &hdr);
2272        encode_putfh(xdr, args->fh, &hdr);
2273        encode_open_confirm(xdr, args, &hdr);
2274        encode_nops(&hdr);
2275}
2276
2277/*
2278 * Encode an OPEN request with no attributes.
2279 */
2280static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2281                                     struct xdr_stream *xdr,
2282                                     struct nfs_openargs *args)
2283{
2284        struct compound_hdr hdr = {
2285                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2286        };
2287
2288        encode_compound_hdr(xdr, req, &hdr);
2289        encode_sequence(xdr, &args->seq_args, &hdr);
2290        encode_putfh(xdr, args->fh, &hdr);
2291        encode_open(xdr, args, &hdr);
2292        if (args->access)
2293                encode_access(xdr, args->access, &hdr);
2294        encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2295        encode_nops(&hdr);
2296}
2297
2298/*
2299 * Encode an OPEN_DOWNGRADE request
2300 */
2301static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2302                                        struct xdr_stream *xdr,
2303                                        struct nfs_closeargs *args)
2304{
2305        struct compound_hdr hdr = {
2306                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2307        };
2308
2309        encode_compound_hdr(xdr, req, &hdr);
2310        encode_sequence(xdr, &args->seq_args, &hdr);
2311        encode_putfh(xdr, args->fh, &hdr);
2312        encode_open_downgrade(xdr, args, &hdr);
2313        encode_getfattr(xdr, args->bitmask, &hdr);
2314        encode_nops(&hdr);
2315}
2316
2317/*
2318 * Encode a LOCK request
2319 */
2320static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2321                              struct nfs_lock_args *args)
2322{
2323        struct compound_hdr hdr = {
2324                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2325        };
2326
2327        encode_compound_hdr(xdr, req, &hdr);
2328        encode_sequence(xdr, &args->seq_args, &hdr);
2329        encode_putfh(xdr, args->fh, &hdr);
2330        encode_lock(xdr, args, &hdr);
2331        encode_nops(&hdr);
2332}
2333
2334/*
2335 * Encode a LOCKT request
2336 */
2337static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2338                               struct nfs_lockt_args *args)
2339{
2340        struct compound_hdr hdr = {
2341                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2342        };
2343
2344        encode_compound_hdr(xdr, req, &hdr);
2345        encode_sequence(xdr, &args->seq_args, &hdr);
2346        encode_putfh(xdr, args->fh, &hdr);
2347        encode_lockt(xdr, args, &hdr);
2348        encode_nops(&hdr);
2349}
2350
2351/*
2352 * Encode a LOCKU request
2353 */
2354static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2355                               struct nfs_locku_args *args)
2356{
2357        struct compound_hdr hdr = {
2358                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2359        };
2360
2361        encode_compound_hdr(xdr, req, &hdr);
2362        encode_sequence(xdr, &args->seq_args, &hdr);
2363        encode_putfh(xdr, args->fh, &hdr);
2364        encode_locku(xdr, args, &hdr);
2365        encode_nops(&hdr);
2366}
2367
2368static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2369                                           struct xdr_stream *xdr,
2370                                        struct nfs_release_lockowner_args *args)
2371{
2372        struct compound_hdr hdr = {
2373                .minorversion = 0,
2374        };
2375
2376        encode_compound_hdr(xdr, req, &hdr);
2377        encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2378        encode_nops(&hdr);
2379}
2380
2381/*
2382 * Encode a READLINK request
2383 */
2384static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2385                                  const struct nfs4_readlink *args)
2386{
2387        struct compound_hdr hdr = {
2388                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2389        };
2390
2391        encode_compound_hdr(xdr, req, &hdr);
2392        encode_sequence(xdr, &args->seq_args, &hdr);
2393        encode_putfh(xdr, args->fh, &hdr);
2394        encode_readlink(xdr, args, req, &hdr);
2395
2396        xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2397                        args->pgbase, args->pglen);
2398        encode_nops(&hdr);
2399}
2400
2401/*
2402 * Encode a READDIR request
2403 */
2404static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2405                                 const struct nfs4_readdir_arg *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_readdir(xdr, args, req, &hdr);
2415
2416        xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2417                         args->pgbase, args->count);
2418        dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2419                        __func__, hdr.replen << 2, args->pages,
2420                        args->pgbase, args->count);
2421        encode_nops(&hdr);
2422}
2423
2424/*
2425 * Encode a READ request
2426 */
2427static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2428                              struct nfs_pgio_args *args)
2429{
2430        struct compound_hdr hdr = {
2431                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2432        };
2433
2434        encode_compound_hdr(xdr, req, &hdr);
2435        encode_sequence(xdr, &args->seq_args, &hdr);
2436        encode_putfh(xdr, args->fh, &hdr);
2437        encode_read(xdr, args, &hdr);
2438
2439        xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2440                         args->pages, args->pgbase, args->count);
2441        req->rq_rcv_buf.flags |= XDRBUF_READ;
2442        encode_nops(&hdr);
2443}
2444
2445/*
2446 * Encode an SETATTR request
2447 */
2448static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2449                                 struct nfs_setattrargs *args)
2450{
2451        struct compound_hdr hdr = {
2452                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2453        };
2454
2455        encode_compound_hdr(xdr, req, &hdr);
2456        encode_sequence(xdr, &args->seq_args, &hdr);
2457        encode_putfh(xdr, args->fh, &hdr);
2458        encode_setattr(xdr, args, args->server, &hdr);
2459        encode_getfattr(xdr, args->bitmask, &hdr);
2460        encode_nops(&hdr);
2461}
2462
2463/*
2464 * Encode a GETACL request
2465 */
2466static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2467                                struct nfs_getaclargs *args)
2468{
2469        struct compound_hdr hdr = {
2470                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2471        };
2472        uint32_t replen;
2473
2474        encode_compound_hdr(xdr, req, &hdr);
2475        encode_sequence(xdr, &args->seq_args, &hdr);
2476        encode_putfh(xdr, args->fh, &hdr);
2477        replen = hdr.replen + op_decode_hdr_maxsz + 1;
2478        encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2479
2480        xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2481                args->acl_pages, args->acl_pgbase, args->acl_len);
2482
2483        encode_nops(&hdr);
2484}
2485
2486/*
2487 * Encode a WRITE request
2488 */
2489static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2490                               struct nfs_pgio_args *args)
2491{
2492        struct compound_hdr hdr = {
2493                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2494        };
2495
2496        encode_compound_hdr(xdr, req, &hdr);
2497        encode_sequence(xdr, &args->seq_args, &hdr);
2498        encode_putfh(xdr, args->fh, &hdr);
2499        encode_write(xdr, args, &hdr);
2500        req->rq_snd_buf.flags |= XDRBUF_WRITE;
2501        if (args->bitmask)
2502                encode_getfattr(xdr, args->bitmask, &hdr);
2503        encode_nops(&hdr);
2504}
2505
2506/*
2507 *  a COMMIT request
2508 */
2509static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2510                                struct nfs_commitargs *args)
2511{
2512        struct compound_hdr hdr = {
2513                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2514        };
2515
2516        encode_compound_hdr(xdr, req, &hdr);
2517        encode_sequence(xdr, &args->seq_args, &hdr);
2518        encode_putfh(xdr, args->fh, &hdr);
2519        encode_commit(xdr, args, &hdr);
2520        encode_nops(&hdr);
2521}
2522
2523/*
2524 * FSINFO request
2525 */
2526static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2527                                struct nfs4_fsinfo_arg *args)
2528{
2529        struct compound_hdr hdr = {
2530                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2531        };
2532
2533        encode_compound_hdr(xdr, req, &hdr);
2534        encode_sequence(xdr, &args->seq_args, &hdr);
2535        encode_putfh(xdr, args->fh, &hdr);
2536        encode_fsinfo(xdr, args->bitmask, &hdr);
2537        encode_nops(&hdr);
2538}
2539
2540/*
2541 * a PATHCONF request
2542 */
2543static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2544                                  const struct nfs4_pathconf_arg *args)
2545{
2546        struct compound_hdr hdr = {
2547                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2548        };
2549
2550        encode_compound_hdr(xdr, req, &hdr);
2551        encode_sequence(xdr, &args->seq_args, &hdr);
2552        encode_putfh(xdr, args->fh, &hdr);
2553        encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2554                           &hdr);
2555        encode_nops(&hdr);
2556}
2557
2558/*
2559 * a STATFS request
2560 */
2561static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2562                                const struct nfs4_statfs_arg *args)
2563{
2564        struct compound_hdr hdr = {
2565                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2566        };
2567
2568        encode_compound_hdr(xdr, req, &hdr);
2569        encode_sequence(xdr, &args->seq_args, &hdr);
2570        encode_putfh(xdr, args->fh, &hdr);
2571        encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2572                           args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2573        encode_nops(&hdr);
2574}
2575
2576/*
2577 * GETATTR_BITMAP request
2578 */
2579static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2580                                     struct xdr_stream *xdr,
2581                                     struct nfs4_server_caps_arg *args)
2582{
2583        struct compound_hdr hdr = {
2584                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2585        };
2586
2587        encode_compound_hdr(xdr, req, &hdr);
2588        encode_sequence(xdr, &args->seq_args, &hdr);
2589        encode_putfh(xdr, args->fhandle, &hdr);
2590        encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2591                           FATTR4_WORD0_FH_EXPIRE_TYPE|
2592                           FATTR4_WORD0_LINK_SUPPORT|
2593                           FATTR4_WORD0_SYMLINK_SUPPORT|
2594                           FATTR4_WORD0_ACLSUPPORT, &hdr);
2595        encode_nops(&hdr);
2596}
2597
2598/*
2599 * a RENEW request
2600 */
2601static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2602                               struct nfs_client *clp)
2603{
2604        struct compound_hdr hdr = {
2605                .nops   = 0,
2606        };
2607
2608        encode_compound_hdr(xdr, req, &hdr);
2609        encode_renew(xdr, clp->cl_clientid, &hdr);
2610        encode_nops(&hdr);
2611}
2612
2613/*
2614 * a SETCLIENTID request
2615 */
2616static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2617                                     struct xdr_stream *xdr,
2618                                     struct nfs4_setclientid *sc)
2619{
2620        struct compound_hdr hdr = {
2621                .nops   = 0,
2622        };
2623
2624        encode_compound_hdr(xdr, req, &hdr);
2625        encode_setclientid(xdr, sc, &hdr);
2626        encode_nops(&hdr);
2627}
2628
2629/*
2630 * a SETCLIENTID_CONFIRM request
2631 */
2632static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2633                                             struct xdr_stream *xdr,
2634                                             struct nfs4_setclientid_res *arg)
2635{
2636        struct compound_hdr hdr = {
2637                .nops   = 0,
2638        };
2639
2640        encode_compound_hdr(xdr, req, &hdr);
2641        encode_setclientid_confirm(xdr, arg, &hdr);
2642        encode_nops(&hdr);
2643}
2644
2645/*
2646 * DELEGRETURN request
2647 */
2648static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2649                                     struct xdr_stream *xdr,
2650                                     const struct nfs4_delegreturnargs *args)
2651{
2652        struct compound_hdr hdr = {
2653                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2654        };
2655
2656        encode_compound_hdr(xdr, req, &hdr);
2657        encode_sequence(xdr, &args->seq_args, &hdr);
2658        encode_putfh(xdr, args->fhandle, &hdr);
2659        encode_getfattr(xdr, args->bitmask, &hdr);
2660        encode_delegreturn(xdr, args->stateid, &hdr);
2661        encode_nops(&hdr);
2662}
2663
2664/*
2665 * Encode FS_LOCATIONS request
2666 */
2667static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2668                                      struct xdr_stream *xdr,
2669                                      struct nfs4_fs_locations_arg *args)
2670{
2671        struct compound_hdr hdr = {
2672                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2673        };
2674        uint32_t replen;
2675
2676        encode_compound_hdr(xdr, req, &hdr);
2677        encode_sequence(xdr, &args->seq_args, &hdr);
2678        if (args->migration) {
2679                encode_putfh(xdr, args->fh, &hdr);
2680                replen = hdr.replen;
2681                encode_fs_locations(xdr, args->bitmask, &hdr);
2682                if (args->renew)
2683                        encode_renew(xdr, args->clientid, &hdr);
2684        } else {
2685                encode_putfh(xdr, args->dir_fh, &hdr);
2686                encode_lookup(xdr, args->name, &hdr);
2687                replen = hdr.replen;
2688                encode_fs_locations(xdr, args->bitmask, &hdr);
2689        }
2690
2691        /* Set up reply kvec to capture returned fs_locations array. */
2692        xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2693                        0, PAGE_SIZE);
2694        encode_nops(&hdr);
2695}
2696
2697/*
2698 * Encode SECINFO request
2699 */
2700static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2701                                struct xdr_stream *xdr,
2702                                struct nfs4_secinfo_arg *args)
2703{
2704        struct compound_hdr hdr = {
2705                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2706        };
2707
2708        encode_compound_hdr(xdr, req, &hdr);
2709        encode_sequence(xdr, &args->seq_args, &hdr);
2710        encode_putfh(xdr, args->dir_fh, &hdr);
2711        encode_secinfo(xdr, args->name, &hdr);
2712        encode_nops(&hdr);
2713}
2714
2715/*
2716 * Encode FSID_PRESENT request
2717 */
2718static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2719                                      struct xdr_stream *xdr,
2720                                      struct nfs4_fsid_present_arg *args)
2721{
2722        struct compound_hdr hdr = {
2723                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2724        };
2725
2726        encode_compound_hdr(xdr, req, &hdr);
2727        encode_sequence(xdr, &args->seq_args, &hdr);
2728        encode_putfh(xdr, args->fh, &hdr);
2729        encode_getfh(xdr, &hdr);
2730        if (args->renew)
2731                encode_renew(xdr, args->clientid, &hdr);
2732        encode_nops(&hdr);
2733}
2734
2735#if defined(CONFIG_NFS_V4_1)
2736/*
2737 * BIND_CONN_TO_SESSION request
2738 */
2739static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2740                                struct xdr_stream *xdr,
2741                                struct nfs41_bind_conn_to_session_args *args)
2742{
2743        struct compound_hdr hdr = {
2744                .minorversion = args->client->cl_mvops->minor_version,
2745        };
2746
2747        encode_compound_hdr(xdr, req, &hdr);
2748        encode_bind_conn_to_session(xdr, args, &hdr);
2749        encode_nops(&hdr);
2750}
2751
2752/*
2753 * EXCHANGE_ID request
2754 */
2755static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2756                                     struct xdr_stream *xdr,
2757                                     struct nfs41_exchange_id_args *args)
2758{
2759        struct compound_hdr hdr = {
2760                .minorversion = args->client->cl_mvops->minor_version,
2761        };
2762
2763        encode_compound_hdr(xdr, req, &hdr);
2764        encode_exchange_id(xdr, args, &hdr);
2765        encode_nops(&hdr);
2766}
2767
2768/*
2769 * a CREATE_SESSION request
2770 */
2771static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2772                                        struct xdr_stream *xdr,
2773                                        struct nfs41_create_session_args *args)
2774{
2775        struct compound_hdr hdr = {
2776                .minorversion = args->client->cl_mvops->minor_version,
2777        };
2778
2779        encode_compound_hdr(xdr, req, &hdr);
2780        encode_create_session(xdr, args, &hdr);
2781        encode_nops(&hdr);
2782}
2783
2784/*
2785 * a DESTROY_SESSION request
2786 */
2787static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2788                                         struct xdr_stream *xdr,
2789                                         struct nfs4_session *session)
2790{
2791        struct compound_hdr hdr = {
2792                .minorversion = session->clp->cl_mvops->minor_version,
2793        };
2794
2795        encode_compound_hdr(xdr, req, &hdr);
2796        encode_destroy_session(xdr, session, &hdr);
2797        encode_nops(&hdr);
2798}
2799
2800/*
2801 * a DESTROY_CLIENTID request
2802 */
2803static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2804                                         struct xdr_stream *xdr,
2805                                         struct nfs_client *clp)
2806{
2807        struct compound_hdr hdr = {
2808                .minorversion = clp->cl_mvops->minor_version,
2809        };
2810
2811        encode_compound_hdr(xdr, req, &hdr);
2812        encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2813        encode_nops(&hdr);
2814}
2815
2816/*
2817 * a SEQUENCE request
2818 */
2819static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2820                                  struct nfs4_sequence_args *args)
2821{
2822        struct compound_hdr hdr = {
2823                .minorversion = nfs4_xdr_minorversion(args),
2824        };
2825
2826        encode_compound_hdr(xdr, req, &hdr);
2827        encode_sequence(xdr, args, &hdr);
2828        encode_nops(&hdr);
2829}
2830
2831/*
2832 * a GET_LEASE_TIME request
2833 */
2834static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2835                                        struct xdr_stream *xdr,
2836                                        struct nfs4_get_lease_time_args *args)
2837{
2838        struct compound_hdr hdr = {
2839                .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2840        };
2841        const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2842
2843        encode_compound_hdr(xdr, req, &hdr);
2844        encode_sequence(xdr, &args->la_seq_args, &hdr);
2845        encode_putrootfh(xdr, &hdr);
2846        encode_fsinfo(xdr, lease_bitmap, &hdr);
2847        encode_nops(&hdr);
2848}
2849
2850/*
2851 * a RECLAIM_COMPLETE request
2852 */
2853static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2854                                          struct xdr_stream *xdr,
2855                                struct nfs41_reclaim_complete_args *args)
2856{
2857        struct compound_hdr hdr = {
2858                .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2859        };
2860
2861        encode_compound_hdr(xdr, req, &hdr);
2862        encode_sequence(xdr, &args->seq_args, &hdr);
2863        encode_reclaim_complete(xdr, args, &hdr);
2864        encode_nops(&hdr);
2865}
2866
2867/*
2868 * Encode GETDEVICEINFO request
2869 */
2870static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2871                                       struct xdr_stream *xdr,
2872                                       struct nfs4_getdeviceinfo_args *args)
2873{
2874        struct compound_hdr hdr = {
2875                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2876        };
2877
2878        encode_compound_hdr(xdr, req, &hdr);
2879        encode_sequence(xdr, &args->seq_args, &hdr);
2880        encode_getdeviceinfo(xdr, args, &hdr);
2881
2882        /* set up reply kvec. Subtract notification bitmap max size (2)
2883         * so that notification bitmap is put in xdr_buf tail */
2884        xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2885                         args->pdev->pages, args->pdev->pgbase,
2886                         args->pdev->pglen);
2887
2888        encode_nops(&hdr);
2889}
2890
2891/*
2892 *  Encode LAYOUTGET request
2893 */
2894static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2895                                   struct xdr_stream *xdr,
2896                                   struct nfs4_layoutget_args *args)
2897{
2898        struct compound_hdr hdr = {
2899                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2900        };
2901
2902        encode_compound_hdr(xdr, req, &hdr);
2903        encode_sequence(xdr, &args->seq_args, &hdr);
2904        encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2905        encode_layoutget(xdr, args, &hdr);
2906
2907        xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2908            args->layout.pages, 0, args->layout.pglen);
2909
2910        encode_nops(&hdr);
2911}
2912
2913/*
2914 *  Encode LAYOUTCOMMIT request
2915 */
2916static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2917                                      struct xdr_stream *xdr,
2918                                      struct nfs4_layoutcommit_args *args)
2919{
2920        struct nfs4_layoutcommit_data *data =
2921                container_of(args, struct nfs4_layoutcommit_data, args);
2922        struct compound_hdr hdr = {
2923                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2924        };
2925
2926        encode_compound_hdr(xdr, req, &hdr);
2927        encode_sequence(xdr, &args->seq_args, &hdr);
2928        encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2929        encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2930        encode_getfattr(xdr, args->bitmask, &hdr);
2931        encode_nops(&hdr);
2932}
2933
2934/*
2935 * Encode LAYOUTRETURN request
2936 */
2937static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2938                                      struct xdr_stream *xdr,
2939                                      struct nfs4_layoutreturn_args *args)
2940{
2941        struct compound_hdr hdr = {
2942                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2943        };
2944
2945        encode_compound_hdr(xdr, req, &hdr);
2946        encode_sequence(xdr, &args->seq_args, &hdr);
2947        encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2948        encode_layoutreturn(xdr, args, &hdr);
2949        encode_nops(&hdr);
2950}
2951
2952/*
2953 * Encode SECINFO_NO_NAME request
2954 */
2955static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
2956                                        struct xdr_stream *xdr,
2957                                        struct nfs41_secinfo_no_name_args *args)
2958{
2959        struct compound_hdr hdr = {
2960                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2961        };
2962
2963        encode_compound_hdr(xdr, req, &hdr);
2964        encode_sequence(xdr, &args->seq_args, &hdr);
2965        encode_putrootfh(xdr, &hdr);
2966        encode_secinfo_no_name(xdr, args, &hdr);
2967        encode_nops(&hdr);
2968        return 0;
2969}
2970
2971/*
2972 *  Encode TEST_STATEID request
2973 */
2974static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
2975                                      struct xdr_stream *xdr,
2976                                      struct nfs41_test_stateid_args *args)
2977{
2978        struct compound_hdr hdr = {
2979                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2980        };
2981
2982        encode_compound_hdr(xdr, req, &hdr);
2983        encode_sequence(xdr, &args->seq_args, &hdr);
2984        encode_test_stateid(xdr, args, &hdr);
2985        encode_nops(&hdr);
2986}
2987
2988/*
2989 *  Encode FREE_STATEID request
2990 */
2991static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
2992                                     struct xdr_stream *xdr,
2993                                     struct nfs41_free_stateid_args *args)
2994{
2995        struct compound_hdr hdr = {
2996                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2997        };
2998
2999        encode_compound_hdr(xdr, req, &hdr);
3000        encode_sequence(xdr, &args->seq_args, &hdr);

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

4001        dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4002        return status;
4003out_overflow:
4004        print_overflow_msg(__func__, xdr);
4005        return -EIO;
4006}
4007
4008static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4009{
4010        __be32 *p;
4011        int ret = 0;
4012
4013        *used = 0;
4014        if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4015                return -EIO;
4016        if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4017                p = xdr_inline_decode(xdr, 8);
4018                if (unlikely(!p))
4019                        goto out_overflow;
4020                xdr_decode_hyper(p, used);
4021                bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4022                ret = NFS_ATTR_FATTR_SPACE_USED;
4023        }
4024        dprintk("%s: space used=%Lu\n", __func__,
4025                        (unsigned long long)*used);
4026        return ret;
4027out_overflow:
4028        print_overflow_msg(__func__, xdr);
4029        return -EIO;
4030}
4031
4032static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
4033{
4034        __be32 *p;
4035        uint64_t sec;
4036        uint32_t nsec;
4037
4038        p = xdr_inline_decode(xdr, 12);
4039        if (unlikely(!p))
4040                goto out_overflow;
4041        p = xdr_decode_hyper(p, &sec);
4042        nsec = be32_to_cpup(p);
4043        time->tv_sec = (time_t)sec;
4044        time->tv_nsec = (long)nsec;
4045        return 0;
4046out_overflow:
4047        print_overflow_msg(__func__, xdr);
4048        return -EIO;
4049}
4050
4051static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4052{
4053        int status = 0;
4054
4055        time->tv_sec = 0;
4056        time->tv_nsec = 0;
4057        if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4058                return -EIO;
4059        if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4060                status = decode_attr_time(xdr, time);
4061                if (status == 0)
4062                        status = NFS_ATTR_FATTR_ATIME;
4063                bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4064        }
4065        dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4066        return status;
4067}
4068
4069static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4070{
4071        int status = 0;
4072
4073        time->tv_sec = 0;
4074        time->tv_nsec = 0;
4075        if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4076                return -EIO;
4077        if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4078                status = decode_attr_time(xdr, time);
4079                if (status == 0)
4080                        status = NFS_ATTR_FATTR_CTIME;
4081                bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4082        }
4083        dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4084        return status;
4085}
4086
4087static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4088                                  struct timespec *time)
4089{
4090        int status = 0;
4091
4092        time->tv_sec = 0;
4093        time->tv_nsec = 0;
4094        if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4095                return -EIO;
4096        if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4097                status = decode_attr_time(xdr, time);
4098                bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4099        }
4100        dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4101                (long)time->tv_nsec);
4102        return status;
4103}
4104
4105static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4106                                        struct nfs4_label *label)
4107{
4108        uint32_t pi = 0;
4109        uint32_t lfs = 0;
4110        __u32 len;
4111        __be32 *p;
4112        int status = 0;
4113
4114        if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4115                return -EIO;
4116        if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4117                p = xdr_inline_decode(xdr, 4);
4118                if (unlikely(!p))
4119                        goto out_overflow;
4120                lfs = be32_to_cpup(p++);
4121                p = xdr_inline_decode(xdr, 4);
4122                if (unlikely(!p))
4123                        goto out_overflow;
4124                pi = be32_to_cpup(p++);
4125                p = xdr_inline_decode(xdr, 4);
4126                if (unlikely(!p))
4127                        goto out_overflow;
4128                len = be32_to_cpup(p++);
4129                p = xdr_inline_decode(xdr, len);
4130                if (unlikely(!p))
4131                        goto out_overflow;
4132                if (len < NFS4_MAXLABELLEN) {
4133                        if (label) {
4134                                memcpy(label->label, p, len);
4135                                label->len = len;
4136                                label->pi = pi;
4137                                label->lfs = lfs;
4138                                status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4139                        }
4140                        bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4141                } else
4142                        printk(KERN_WARNING "%s: label too long (%u)!\n",
4143                                        __func__, len);
4144        }
4145        if (label && label->label)
4146                dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4147                        (char *)label->label, label->len, label->pi, label->lfs);
4148        return status;
4149
4150out_overflow:
4151        print_overflow_msg(__func__, xdr);
4152        return -EIO;
4153}
4154
4155static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4156{
4157        int status = 0;
4158
4159        time->tv_sec = 0;
4160        time->tv_nsec = 0;
4161        if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4162                return -EIO;
4163        if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4164                status = decode_attr_time(xdr, time);
4165                if (status == 0)
4166                        status = NFS_ATTR_FATTR_MTIME;
4167                bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4168        }
4169        dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4170        return status;
4171}
4172
4173static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4174{
4175        unsigned int attrwords = XDR_QUADLEN(attrlen);
4176        unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4177
4178        if (unlikely(attrwords != nwords)) {
4179                dprintk("%s: server returned incorrect attribute length: "
4180                        "%u %c %u\n",
4181                                __func__,
4182                                attrwords << 2,
4183                                (attrwords < nwords) ? '<' : '>',
4184                                nwords << 2);
4185                return -EIO;
4186        }
4187        return 0;
4188}
4189
4190static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4191{
4192        __be32 *p;
4193
4194        p = xdr_inline_decode(xdr, 20);
4195        if (unlikely(!p))
4196                goto out_overflow;
4197        cinfo->atomic = be32_to_cpup(p++);
4198        p = xdr_decode_hyper(p, &cinfo->before);
4199        xdr_decode_hyper(p, &cinfo->after);
4200        return 0;
4201out_overflow:
4202        print_overflow_msg(__func__, xdr);
4203        return -EIO;
4204}
4205
4206static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4207{
4208        __be32 *p;
4209        uint32_t supp, acc;
4210        int status;
4211
4212        status = decode_op_hdr(xdr, OP_ACCESS);
4213        if (status)
4214                return status;
4215        p = xdr_inline_decode(xdr, 8);
4216        if (unlikely(!p))
4217                goto out_overflow;
4218        supp = be32_to_cpup(p++);
4219        acc = be32_to_cpup(p);
4220        *supported = supp;
4221        *access = acc;
4222        return 0;
4223out_overflow:
4224        print_overflow_msg(__func__, xdr);
4225        return -EIO;
4226}
4227
4228static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4229{
4230        __be32 *p;
4231
4232        p = xdr_inline_decode(xdr, len);
4233        if (likely(p)) {
4234                memcpy(buf, p, len);
4235                return 0;
4236        }
4237        print_overflow_msg(__func__, xdr);
4238        return -EIO;
4239}
4240
4241static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4242{
4243        return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4244}
4245
4246static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4247{
4248        int status;
4249
4250        status = decode_op_hdr(xdr, OP_CLOSE);
4251        if (status != -EIO)
4252                nfs_increment_open_seqid(status, res->seqid);
4253        if (!status)
4254                status = decode_stateid(xdr, &res->stateid);
4255        return status;
4256}
4257
4258static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4259{
4260        return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4261}
4262
4263static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4264{
4265        return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4266}
4267
4268static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4269{
4270        int status;
4271
4272        status = decode_op_hdr(xdr, OP_COMMIT);
4273        if (!status)
4274                status = decode_write_verifier(xdr, &res->verf->verifier);
4275        return status;
4276}
4277
4278static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4279{
4280        __be32 *p;
4281        uint32_t bmlen;
4282        int status;
4283
4284        status = decode_op_hdr(xdr, OP_CREATE);
4285        if (status)
4286                return status;
4287        if ((status = decode_change_info(xdr, cinfo)))
4288                return status;
4289        p = xdr_inline_decode(xdr, 4);
4290        if (unlikely(!p))
4291                goto out_overflow;
4292        bmlen = be32_to_cpup(p);
4293        p = xdr_inline_decode(xdr, bmlen << 2);
4294        if (likely(p))
4295                return 0;
4296out_overflow:
4297        print_overflow_msg(__func__, xdr);
4298        return -EIO;
4299}
4300
4301static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4302{
4303        unsigned int savep;
4304        uint32_t attrlen, bitmap[3] = {0};
4305        int status;
4306
4307        if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4308                goto xdr_error;
4309        if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4310                goto xdr_error;
4311        if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4312                goto xdr_error;
4313        if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4314                goto xdr_error;
4315        if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4316                                                 &res->fh_expire_type)) != 0)
4317                goto xdr_error;
4318        if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4319                goto xdr_error;
4320        if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4321                goto xdr_error;
4322        if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4323                goto xdr_error;
4324        status = verify_attr_len(xdr, savep, attrlen);
4325xdr_error:
4326        dprintk("%s: xdr returned %d!\n", __func__, -status);
4327        return status;
4328}
4329
4330static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4331{
4332        unsigned int savep;
4333        uint32_t attrlen, bitmap[3] = {0};
4334        int status;
4335
4336        if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4337                goto xdr_error;
4338        if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4339                goto xdr_error;
4340        if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4341                goto xdr_error;
4342
4343        if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4344                goto xdr_error;
4345        if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4346                goto xdr_error;
4347        if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4348                goto xdr_error;
4349        if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4350                goto xdr_error;
4351        if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4352                goto xdr_error;
4353        if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4354                goto xdr_error;
4355
4356        status = verify_attr_len(xdr, savep, attrlen);
4357xdr_error:
4358        dprintk("%s: xdr returned %d!\n", __func__, -status);
4359        return status;
4360}
4361
4362static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4363{
4364        unsigned int savep;
4365        uint32_t attrlen, bitmap[3] = {0};
4366        int status;
4367
4368        if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4369                goto xdr_error;
4370        if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4371                goto xdr_error;
4372        if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4373                goto xdr_error;
4374
4375        if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4376                goto xdr_error;
4377        if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4378                goto xdr_error;
4379
4380        status = verify_attr_len(xdr, savep, attrlen);
4381xdr_error:
4382        dprintk("%s: xdr returned %d!\n", __func__, -status);
4383        return status;
4384}
4385
4386static int decode_threshold_hint(struct xdr_stream *xdr,
4387                                  uint32_t *bitmap,
4388                                  uint64_t *res,
4389                                  uint32_t hint_bit)
4390{
4391        __be32 *p;
4392
4393        *res = 0;
4394        if (likely(bitmap[0] & hint_bit)) {
4395                p = xdr_inline_decode(xdr, 8);
4396                if (unlikely(!p))
4397                        goto out_overflow;
4398                xdr_decode_hyper(p, res);
4399        }
4400        return 0;
4401out_overflow:
4402        print_overflow_msg(__func__, xdr);
4403        return -EIO;
4404}
4405
4406static int decode_first_threshold_item4(struct xdr_stream *xdr,
4407                                        struct nfs4_threshold *res)
4408{
4409        __be32 *p;
4410        unsigned int savep;
4411        uint32_t bitmap[3] = {0,}, attrlen;
4412        int status;
4413
4414        /* layout type */
4415        p = xdr_inline_decode(xdr, 4);
4416        if (unlikely(!p)) {
4417                print_overflow_msg(__func__, xdr);
4418                return -EIO;
4419        }
4420        res->l_type = be32_to_cpup(p);
4421
4422        /* thi_hintset bitmap */
4423        status = decode_attr_bitmap(xdr, bitmap);
4424        if (status < 0)
4425                goto xdr_error;
4426
4427        /* thi_hintlist length */
4428        status = decode_attr_length(xdr, &attrlen, &savep);
4429        if (status < 0)
4430                goto xdr_error;
4431        /* thi_hintlist */
4432        status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4433        if (status < 0)
4434                goto xdr_error;
4435        status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4436        if (status < 0)
4437                goto xdr_error;
4438        status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4439                                       THRESHOLD_RD_IO);
4440        if (status < 0)
4441                goto xdr_error;
4442        status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4443                                       THRESHOLD_WR_IO);
4444        if (status < 0)
4445                goto xdr_error;
4446
4447        status = verify_attr_len(xdr, savep, attrlen);
4448        res->bm = bitmap[0];
4449
4450        dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4451                 __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4452                res->wr_io_sz);
4453xdr_error:
4454        dprintk("%s ret=%d!\n", __func__, status);
4455        return status;
4456}
4457
4458/*
4459 * Thresholds on pNFS direct I/O vrs MDS I/O
4460 */
4461static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4462                                    uint32_t *bitmap,
4463                                    struct nfs4_threshold *res)
4464{
4465        __be32 *p;
4466        int status = 0;
4467        uint32_t num;
4468
4469        if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4470                return -EIO;
4471        if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4472                /* Did the server return an unrequested attribute? */
4473                if (unlikely(res == NULL))
4474                        return -EREMOTEIO;
4475                p = xdr_inline_decode(xdr, 4);
4476                if (unlikely(!p))
4477                        goto out_overflow;
4478                num = be32_to_cpup(p);
4479                if (num == 0)
4480                        return 0;
4481                if (num > 1)
4482                        printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4483                                "drivers per filesystem not supported\n",
4484                                __func__);
4485
4486                status = decode_first_threshold_item4(xdr, res);
4487                bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4488        }
4489        return status;
4490out_overflow:
4491        print_overflow_msg(__func__, xdr);
4492        return -EIO;
4493}
4494
4495static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4496                struct nfs_fattr *fattr, struct nfs_fh *fh,
4497                struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4498                const struct nfs_server *server)
4499{
4500        int status;
4501        umode_t fmode = 0;
4502        uint32_t type;
4503        int32_t err;
4504
4505        status = decode_attr_type(xdr, bitmap, &type);
4506        if (status < 0)
4507                goto xdr_error;
4508        fattr->mode = 0;
4509        if (status != 0) {
4510                fattr->mode |= nfs_type2fmt[type];
4511                fattr->valid |= status;
4512        }
4513
4514        status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4515        if (status < 0)
4516                goto xdr_error;
4517        fattr->valid |= status;
4518
4519        status = decode_attr_size(xdr, bitmap, &fattr->size);
4520        if (status < 0)
4521                goto xdr_error;
4522        fattr->valid |= status;
4523
4524        status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4525        if (status < 0)
4526                goto xdr_error;
4527        fattr->valid |= status;
4528
4529        err = 0;
4530        status = decode_attr_error(xdr, bitmap, &err);
4531        if (status < 0)
4532                goto xdr_error;
4533
4534        status = decode_attr_filehandle(xdr, bitmap, fh);
4535        if (status < 0)
4536                goto xdr_error;
4537
4538        status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4539        if (status < 0)
4540                goto xdr_error;
4541        fattr->valid |= status;
4542
4543        status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4544        if (status < 0)
4545                goto xdr_error;
4546        fattr->valid |= status;
4547
4548        status = decode_attr_mode(xdr, bitmap, &fmode);
4549        if (status < 0)
4550                goto xdr_error;
4551        if (status != 0) {
4552                fattr->mode |= fmode;
4553                fattr->valid |= status;
4554        }
4555
4556        status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4557        if (status < 0)
4558                goto xdr_error;
4559        fattr->valid |= status;
4560
4561        status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4562        if (status < 0)
4563                goto xdr_error;
4564        fattr->valid |= status;
4565
4566        status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4567        if (status < 0)
4568                goto xdr_error;
4569        fattr->valid |= status;
4570
4571        status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4572        if (status < 0)
4573                goto xdr_error;
4574        fattr->valid |= status;
4575
4576        status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4577        if (status < 0)
4578                goto xdr_error;
4579        fattr->valid |= status;
4580
4581        status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4582        if (status < 0)
4583                goto xdr_error;
4584        fattr->valid |= status;
4585
4586        status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4587        if (status < 0)
4588                goto xdr_error;
4589        fattr->valid |= status;
4590
4591        status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4592        if (status < 0)
4593                goto xdr_error;
4594        fattr->valid |= status;
4595
4596        status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4597        if (status < 0)
4598                goto xdr_error;
4599        fattr->valid |= status;
4600
4601        status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4602        if (status < 0)
4603                goto xdr_error;
4604
4605        if (label) {
4606                status = decode_attr_security_label(xdr, bitmap, label);
4607                if (status < 0)
4608                        goto xdr_error;
4609                fattr->valid |= status;
4610        }
4611
4612xdr_error:
4613        dprintk("%s: xdr returned %d\n", __func__, -status);
4614        return status;
4615}
4616
4617static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4618                struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4619                struct nfs4_label *label, const struct nfs_server *server)
4620{
4621        unsigned int savep;
4622        uint32_t attrlen,
4623                 bitmap[3] = {0};
4624        int status;
4625
4626        status = decode_op_hdr(xdr, OP_GETATTR);
4627        if (status < 0)
4628                goto xdr_error;
4629
4630        status = decode_attr_bitmap(xdr, bitmap);
4631        if (status < 0)
4632                goto xdr_error;
4633
4634        status = decode_attr_length(xdr, &attrlen, &savep);
4635        if (status < 0)
4636                goto xdr_error;
4637
4638        status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4639                                        label, server);
4640        if (status < 0)
4641                goto xdr_error;
4642
4643        status = verify_attr_len(xdr, savep, attrlen);
4644xdr_error:
4645        dprintk("%s: xdr returned %d\n", __func__, -status);
4646        return status;
4647}
4648
4649static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4650                struct nfs4_label *label, const struct nfs_server *server)
4651{
4652        return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4653}
4654
4655static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4656                const struct nfs_server *server)
4657{
4658        return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4659}
4660
4661/*
4662 * Decode potentially multiple layout types. Currently we only support
4663 * one layout driver per file system.
4664 */
4665static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4666                                         uint32_t *layouttype)
4667{
4668        __be32 *p;
4669        int num;
4670
4671        p = xdr_inline_decode(xdr, 4);
4672        if (unlikely(!p))
4673                goto out_overflow;
4674        num = be32_to_cpup(p);
4675
4676        /* pNFS is not supported by the underlying file system */
4677        if (num == 0) {
4678                *layouttype = 0;
4679                return 0;
4680        }
4681        if (num > 1)
4682                printk(KERN_INFO "NFS: %s: Warning: Multiple pNFS layout "
4683                        "drivers per filesystem not supported\n", __func__);
4684
4685        /* Decode and set first layout type, move xdr->p past unused types */
4686        p = xdr_inline_decode(xdr, num * 4);
4687        if (unlikely(!p))
4688                goto out_overflow;
4689        *layouttype = be32_to_cpup(p);
4690        return 0;
4691out_overflow:
4692        print_overflow_msg(__func__, xdr);
4693        return -EIO;
4694}
4695
4696/*
4697 * The type of file system exported.
4698 * Note we must ensure that layouttype is set in any non-error case.
4699 */
4700static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4701                                uint32_t *layouttype)
4702{
4703        int status = 0;
4704
4705        dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4706        if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4707                return -EIO;
4708        if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4709                status = decode_first_pnfs_layout_type(xdr, layouttype);
4710                bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4711        } else
4712                *layouttype = 0;
4713        return status;
4714}
4715
4716/*
4717 * The prefered block size for layout directed io
4718 */
4719static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4720                                      uint32_t *res)
4721{
4722        __be32 *p;
4723
4724        dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4725        *res = 0;
4726        if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4727                p = xdr_inline_decode(xdr, 4);
4728                if (unlikely(!p)) {
4729                        print_overflow_msg(__func__, xdr);
4730                        return -EIO;
4731                }
4732                *res = be32_to_cpup(p);
4733                bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4734        }
4735        return 0;
4736}
4737
4738static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4739{
4740        unsigned int savep;
4741        uint32_t attrlen, bitmap[3];
4742        int status;
4743
4744        if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4745                goto xdr_error;
4746        if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4747                goto xdr_error;
4748        if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4749                goto xdr_error;
4750
4751        fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4752
4753        if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4754                goto xdr_error;
4755        if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4756                goto xdr_error;
4757        if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4758                goto xdr_error;
4759        fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4760        if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4761                goto xdr_error;
4762        fsinfo->wtpref = fsinfo->wtmax;
4763        status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4764        if (status != 0)
4765                goto xdr_error;
4766        status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4767        if (status != 0)
4768                goto xdr_error;
4769        status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4770        if (status)
4771                goto xdr_error;
4772
4773        status = verify_attr_len(xdr, savep, attrlen);
4774xdr_error:
4775        dprintk("%s: xdr returned %d!\n", __func__, -status);
4776        return status;
4777}
4778
4779static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4780{
4781        __be32 *p;
4782        uint32_t len;
4783        int status;
4784
4785        /* Zero handle first to allow comparisons */
4786        memset(fh, 0, sizeof(*fh));
4787
4788        status = decode_op_hdr(xdr, OP_GETFH);
4789        if (status)
4790                return status;
4791
4792        p = xdr_inline_decode(xdr, 4);
4793        if (unlikely(!p))
4794                goto out_overflow;
4795        len = be32_to_cpup(p);
4796        if (len > NFS4_FHSIZE)
4797                return -EIO;
4798        fh->size = len;
4799        p = xdr_inline_decode(xdr, len);
4800        if (unlikely(!p))
4801                goto out_overflow;
4802        memcpy(fh->data, p, len);
4803        return 0;
4804out_overflow:
4805        print_overflow_msg(__func__, xdr);
4806        return -EIO;
4807}
4808
4809static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4810{
4811        int status;
4812
4813        status = decode_op_hdr(xdr, OP_LINK);
4814        if (status)
4815                return status;
4816        return decode_change_info(xdr, cinfo);
4817}
4818
4819/*
4820 * We create the owner, so we know a proper owner.id length is 4.
4821 */
4822static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4823{
4824        uint64_t offset, length, clientid;
4825        __be32 *p;
4826        uint32_t namelen, type;
4827
4828        p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4829        if (unlikely(!p))
4830                goto out_overflow;
4831        p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4832        p = xdr_decode_hyper(p, &length);
4833        type = be32_to_cpup(p++); /* 4 byte read */
4834        if (fl != NULL) { /* manipulate file lock */
4835                fl->fl_start = (loff_t)offset;
4836                fl->fl_end = fl->fl_start + (loff_t)length - 1;
4837                if (length == ~(uint64_t)0)
4838                        fl->fl_end = OFFSET_MAX;
4839                fl->fl_type = F_WRLCK;
4840                if (type & 1)
4841                        fl->fl_type = F_RDLCK;
4842                fl->fl_pid = 0;
4843        }
4844        p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4845        namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4846        p = xdr_inline_decode(xdr, namelen); /* variable size field */
4847        if (likely(p))
4848                return -NFS4ERR_DENIED;
4849out_overflow:
4850        print_overflow_msg(__func__, xdr);
4851        return -EIO;
4852}
4853
4854static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4855{
4856        int status;
4857
4858        status = decode_op_hdr(xdr, OP_LOCK);
4859        if (status == -EIO)
4860                goto out;
4861        if (status == 0) {
4862                status = decode_stateid(xdr, &res->stateid);
4863                if (unlikely(status))
4864                        goto out;
4865        } else if (status == -NFS4ERR_DENIED)
4866                status = decode_lock_denied(xdr, NULL);
4867        if (res->open_seqid != NULL)
4868                nfs_increment_open_seqid(status, res->open_seqid);
4869        nfs_increment_lock_seqid(status, res->lock_seqid);
4870out:
4871        return status;
4872}
4873
4874static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4875{
4876        int status;
4877        status = decode_op_hdr(xdr, OP_LOCKT);
4878        if (status == -NFS4ERR_DENIED)
4879                return decode_lock_denied(xdr, res->denied);
4880        return status;
4881}
4882
4883static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4884{
4885        int status;
4886
4887        status = decode_op_hdr(xdr, OP_LOCKU);
4888        if (status != -EIO)
4889                nfs_increment_lock_seqid(status, res->seqid);
4890        if (status == 0)
4891                status = decode_stateid(xdr, &res->stateid);
4892        return status;
4893}
4894
4895static int decode_release_lockowner(struct xdr_stream *xdr)
4896{
4897        return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4898}
4899
4900static int decode_lookup(struct xdr_stream *xdr)
4901{
4902        return decode_op_hdr(xdr, OP_LOOKUP);
4903}
4904
4905/* This is too sick! */
4906static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4907{
4908        __be32 *p;
4909        uint32_t limit_type, nblocks, blocksize;
4910
4911        p = xdr_inline_decode(xdr, 12);
4912        if (unlikely(!p))
4913                goto out_overflow;
4914        limit_type = be32_to_cpup(p++);
4915        switch (limit_type) {
4916        case 1:
4917                xdr_decode_hyper(p, maxsize);
4918                break;
4919        case 2:
4920                nblocks = be32_to_cpup(p++);
4921                blocksize = be32_to_cpup(p);
4922                *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4923        }
4924        return 0;
4925out_overflow:
4926        print_overflow_msg(__func__, xdr);
4927        return -EIO;
4928}
4929
4930static int decode_rw_delegation(struct xdr_stream *xdr,
4931                uint32_t delegation_type,
4932                struct nfs_openres *res)
4933{
4934        __be32 *p;
4935        int status;
4936
4937        status = decode_stateid(xdr, &res->delegation);
4938        if (unlikely(status))
4939                return status;
4940        p = xdr_inline_decode(xdr, 4);
4941        if (unlikely(!p))
4942                goto out_overflow;
4943        res->do_recall = be32_to_cpup(p);
4944
4945        switch (delegation_type) {
4946        case NFS4_OPEN_DELEGATE_READ:
4947                res->delegation_type = FMODE_READ;
4948                break;
4949        case NFS4_OPEN_DELEGATE_WRITE:
4950                res->delegation_type = FMODE_WRITE|FMODE_READ;
4951                if (decode_space_limit(xdr, &res->maxsize) < 0)
4952                                return -EIO;
4953        }
4954        return decode_ace(xdr, NULL, res->server->nfs_client);
4955out_overflow:
4956        print_overflow_msg(__func__, xdr);
4957        return -EIO;
4958}
4959
4960static int decode_no_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4961{
4962        __be32 *p;
4963        uint32_t why_no_delegation;
4964
4965        p = xdr_inline_decode(xdr, 4);
4966        if (unlikely(!p))
4967                goto out_overflow;
4968        why_no_delegation = be32_to_cpup(p);
4969        switch (why_no_delegation) {
4970                case WND4_CONTENTION:
4971                case WND4_RESOURCE:
4972                        xdr_inline_decode(xdr, 4);
4973                        /* Ignore for now */
4974        }
4975        return 0;
4976out_overflow:
4977        print_overflow_msg(__func__, xdr);
4978        return -EIO;
4979}
4980
4981static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4982{
4983        __be32 *p;
4984        uint32_t delegation_type;
4985
4986        p = xdr_inline_decode(xdr, 4);
4987        if (unlikely(!p))
4988                goto out_overflow;
4989        delegation_type = be32_to_cpup(p);
4990        res->delegation_type = 0;
4991        switch (delegation_type) {
4992        case NFS4_OPEN_DELEGATE_NONE:
4993                return 0;
4994        case NFS4_OPEN_DELEGATE_READ:
4995        case NFS4_OPEN_DELEGATE_WRITE:
4996                return decode_rw_delegation(xdr, delegation_type, res);
4997        case NFS4_OPEN_DELEGATE_NONE_EXT:
4998                return decode_no_delegation(xdr, res);
4999        }
5000        return -EIO;

5001out_overflow:
5002        print_overflow_msg(__func__, xdr);
5003        return -EIO;
5004}
5005
5006static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
5007{
5008        __be32 *p;
5009        uint32_t savewords, bmlen, i;
5010        int status;
5011
5012        if (!__decode_op_hdr(xdr, OP_OPEN, &status))
5013                return status;
5014        nfs_increment_open_seqid(status, res->seqid);
5015        if (status)
5016                return status;
5017        status = decode_stateid(xdr, &res->stateid);
5018        if (unlikely(status))
5019                return status;
5020
5021        decode_change_info(xdr, &res->cinfo);
5022
5023        p = xdr_inline_decode(xdr, 8);
5024        if (unlikely(!p))
5025                goto out_overflow;
5026        res->rflags = be32_to_cpup(p++);
5027        bmlen = be32_to_cpup(p);
5028        if (bmlen > 10)
5029                goto xdr_error;
5030
5031        p = xdr_inline_decode(xdr, bmlen << 2);
5032        if (unlikely(!p))
5033                goto out_overflow;
5034        savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5035        for (i = 0; i < savewords; ++i)
5036                res->attrset[i] = be32_to_cpup(p++);
5037        for (; i < NFS4_BITMAP_SIZE; i++)
5038                res->attrset[i] = 0;
5039
5040        return decode_delegation(xdr, res);
5041xdr_error:
5042        dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5043        return -EIO;
5044out_overflow:
5045        print_overflow_msg(__func__, xdr);
5046        return -EIO;
5047}
5048
5049static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5050{
5051        int status;
5052
5053        status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5054        if (status != -EIO)
5055                nfs_increment_open_seqid(status, res->seqid);
5056        if (!status)
5057                status = decode_stateid(xdr, &res->stateid);
5058        return status;
5059}
5060
5061static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5062{
5063        int status;
5064
5065        status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5066        if (status != -EIO)
5067                nfs_increment_open_seqid(status, res->seqid);
5068        if (!status)
5069                status = decode_stateid(xdr, &res->stateid);
5070        return status;
5071}
5072
5073static int decode_putfh(struct xdr_stream *xdr)
5074{
5075        return decode_op_hdr(xdr, OP_PUTFH);
5076}
5077
5078static int decode_putrootfh(struct xdr_stream *xdr)
5079{
5080        return decode_op_hdr(xdr, OP_PUTROOTFH);
5081}
5082
5083static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5084                       struct nfs_pgio_res *res)
5085{
5086        __be32 *p;
5087        uint32_t count, eof, recvd;
5088        int status;
5089
5090        status = decode_op_hdr(xdr, OP_READ);
5091        if (status)
5092                return status;
5093        p = xdr_inline_decode(xdr, 8);
5094        if (unlikely(!p))
5095                goto out_overflow;
5096        eof = be32_to_cpup(p++);
5097        count = be32_to_cpup(p);
5098        recvd = xdr_read_pages(xdr, count);
5099        if (count > recvd) {
5100                dprintk("NFS: server cheating in read reply: "
5101                                "count %u > recvd %u\n", count, recvd);
5102                count = recvd;
5103                eof = 0;
5104        }
5105        res->eof = eof;
5106        res->count = count;
5107        return 0;
5108out_overflow:
5109        print_overflow_msg(__func__, xdr);
5110        return -EIO;
5111}
5112
5113static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5114{
5115        int             status;
5116        __be32          verf[2];
5117
5118        status = decode_op_hdr(xdr, OP_READDIR);
5119        if (!status)
5120                status = decode_verifier(xdr, readdir->verifier.data);
5121        if (unlikely(status))
5122                return status;
5123        memcpy(verf, readdir->verifier.data, sizeof(verf));
5124        dprintk("%s: verifier = %08x:%08x\n",
5125                        __func__, verf[0], verf[1]);
5126        return xdr_read_pages(xdr, xdr->buf->page_len);
5127}
5128
5129static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5130{
5131        struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5132        u32 len, recvd;
5133        __be32 *p;
5134        int status;
5135
5136        status = decode_op_hdr(xdr, OP_READLINK);
5137        if (status)
5138                return status;
5139
5140        /* Convert length of symlink */
5141        p = xdr_inline_decode(xdr, 4);
5142        if (unlikely(!p))
5143                goto out_overflow;
5144        len = be32_to_cpup(p);
5145        if (len >= rcvbuf->page_len || len <= 0) {
5146                dprintk("nfs: server returned giant symlink!\n");
5147                return -ENAMETOOLONG;
5148        }
5149        recvd = xdr_read_pages(xdr, len);
5150        if (recvd < len) {
5151                dprintk("NFS: server cheating in readlink reply: "
5152                                "count %u > recvd %u\n", len, recvd);
5153                return -EIO;
5154        }
5155        /*
5156         * The XDR encode routine has set things up so that
5157         * the link text will be copied directly into the
5158         * buffer.  We just have to do overflow-checking,
5159         * and and null-terminate the text (the VFS expects
5160         * null-termination).
5161         */
5162        xdr_terminate_string(rcvbuf, len);
5163        return 0;
5164out_overflow:
5165        print_overflow_msg(__func__, xdr);
5166        return -EIO;
5167}
5168
5169static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5170{
5171        int status;
5172
5173        status = decode_op_hdr(xdr, OP_REMOVE);
5174        if (status)
5175                goto out;
5176        status = decode_change_info(xdr, cinfo);
5177out:
5178        return status;
5179}
5180
5181static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5182              struct nfs4_change_info *new_cinfo)
5183{
5184        int status;
5185
5186        status = decode_op_hdr(xdr, OP_RENAME);
5187        if (status)
5188                goto out;
5189        if ((status = decode_change_info(xdr, old_cinfo)))
5190                goto out;
5191        status = decode_change_info(xdr, new_cinfo);
5192out:
5193        return status;
5194}
5195
5196static int decode_renew(struct xdr_stream *xdr)
5197{
5198        return decode_op_hdr(xdr, OP_RENEW);
5199}
5200
5201static int
5202decode_restorefh(struct xdr_stream *xdr)
5203{
5204        return decode_op_hdr(xdr, OP_RESTOREFH);
5205}
5206
5207static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5208                         struct nfs_getaclres *res)
5209{
5210        unsigned int savep;
5211        uint32_t attrlen,
5212                 bitmap[3] = {0};
5213        int status;
5214        unsigned int pg_offset;
5215
5216        res->acl_len = 0;
5217        if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5218                goto out;
5219
5220        xdr_enter_page(xdr, xdr->buf->page_len);
5221
5222        /* Calculate the offset of the page data */
5223        pg_offset = xdr->buf->head[0].iov_len;
5224
5225        if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5226                goto out;
5227        if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5228                goto out;
5229
5230        if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5231                return -EIO;
5232        if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5233
5234                /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5235                 * are stored with the acl data to handle the problem of
5236                 * variable length bitmaps.*/
5237                res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5238                res->acl_len = attrlen;
5239
5240                /* Check for receive buffer overflow */
5241                if (res->acl_len > (xdr->nwords << 2) ||
5242                    res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5243                        res->acl_flags |= NFS4_ACL_TRUNC;
5244                        dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5245                                        attrlen, xdr->nwords << 2);
5246                }
5247        } else
5248                status = -EOPNOTSUPP;
5249
5250out:
5251        return status;
5252}
5253
5254static int
5255decode_savefh(struct xdr_stream *xdr)
5256{
5257        return decode_op_hdr(xdr, OP_SAVEFH);
5258}
5259
5260static int decode_setattr(struct xdr_stream *xdr)
5261{
5262        __be32 *p;
5263        uint32_t bmlen;
5264        int status;
5265
5266        status = decode_op_hdr(xdr, OP_SETATTR);
5267        if (status)
5268                return status;
5269        p = xdr_inline_decode(xdr, 4);
5270        if (unlikely(!p))
5271                goto out_overflow;
5272        bmlen = be32_to_cpup(p);
5273        p = xdr_inline_decode(xdr, bmlen << 2);
5274        if (likely(p))
5275                return 0;
5276out_overflow:
5277        print_overflow_msg(__func__, xdr);
5278        return -EIO;
5279}
5280
5281static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5282{
5283        __be32 *p;
5284        uint32_t opnum;
5285        int32_t nfserr;
5286
5287        p = xdr_inline_decode(xdr, 8);
5288        if (unlikely(!p))
5289                goto out_overflow;
5290        opnum = be32_to_cpup(p++);
5291        if (opnum != OP_SETCLIENTID) {
5292                dprintk("nfs: decode_setclientid: Server returned operation"
5293                        " %d\n", opnum);
5294                return -EIO;
5295        }
5296        nfserr = be32_to_cpup(p);
5297        if (nfserr == NFS_OK) {
5298                p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5299                if (unlikely(!p))
5300                        goto out_overflow;
5301                p = xdr_decode_hyper(p, &res->clientid);
5302                memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5303        } else if (nfserr == NFSERR_CLID_INUSE) {
5304                uint32_t len;
5305
5306                /* skip netid string */
5307                p = xdr_inline_decode(xdr, 4);
5308                if (unlikely(!p))
5309                        goto out_overflow;
5310                len = be32_to_cpup(p);
5311                p = xdr_inline_decode(xdr, len);
5312                if (unlikely(!p))
5313                        goto out_overflow;
5314
5315                /* skip uaddr string */
5316                p = xdr_inline_decode(xdr, 4);
5317                if (unlikely(!p))
5318                        goto out_overflow;
5319                len = be32_to_cpup(p);
5320                p = xdr_inline_decode(xdr, len);
5321                if (unlikely(!p))
5322                        goto out_overflow;
5323                return -NFSERR_CLID_INUSE;
5324        } else
5325                return nfs4_stat_to_errno(nfserr);
5326
5327        return 0;
5328out_overflow:
5329        print_overflow_msg(__func__, xdr);
5330        return -EIO;
5331}
5332
5333static int decode_setclientid_confirm(struct xdr_stream *xdr)
5334{
5335        return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5336}
5337
5338static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5339{
5340        __be32 *p;
5341        int status;
5342
5343        status = decode_op_hdr(xdr, OP_WRITE);
5344        if (status)
5345                return status;
5346
5347        p = xdr_inline_decode(xdr, 8);
5348        if (unlikely(!p))
5349                goto out_overflow;
5350        res->count = be32_to_cpup(p++);
5351        res->verf->committed = be32_to_cpup(p++);
5352        return decode_write_verifier(xdr, &res->verf->verifier);
5353out_overflow:
5354        print_overflow_msg(__func__, xdr);
5355        return -EIO;
5356}
5357
5358static int decode_delegreturn(struct xdr_stream *xdr)
5359{
5360        return decode_op_hdr(xdr, OP_DELEGRETURN);
5361}
5362
5363static int decode_secinfo_gss(struct xdr_stream *xdr,
5364                              struct nfs4_secinfo4 *flavor)
5365{
5366        u32 oid_len;
5367        __be32 *p;
5368
5369        p = xdr_inline_decode(xdr, 4);
5370        if (unlikely(!p))
5371                goto out_overflow;
5372        oid_len = be32_to_cpup(p);
5373        if (oid_len > GSS_OID_MAX_LEN)
5374                goto out_err;
5375
5376        p = xdr_inline_decode(xdr, oid_len);
5377        if (unlikely(!p))
5378                goto out_overflow;
5379        memcpy(flavor->flavor_info.oid.data, p, oid_len);
5380        flavor->flavor_info.oid.len = oid_len;
5381
5382        p = xdr_inline_decode(xdr, 8);
5383        if (unlikely(!p))
5384                goto out_overflow;
5385        flavor->flavor_info.qop = be32_to_cpup(p++);
5386        flavor->flavor_info.service = be32_to_cpup(p);
5387
5388        return 0;
5389
5390out_overflow:
5391        print_overflow_msg(__func__, xdr);
5392        return -EIO;
5393out_err:
5394        return -EINVAL;
5395}
5396
5397static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5398{
5399        struct nfs4_secinfo4 *sec_flavor;
5400        unsigned int i, num_flavors;
5401        int status;
5402        __be32 *p;
5403
5404        p = xdr_inline_decode(xdr, 4);
5405        if (unlikely(!p))
5406                goto out_overflow;
5407
5408        res->flavors->num_flavors = 0;
5409        num_flavors = be32_to_cpup(p);
5410
5411        for (i = 0; i < num_flavors; i++) {
5412                sec_flavor = &res->flavors->flavors[i];
5413                if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5414                        break;
5415
5416                p = xdr_inline_decode(xdr, 4);
5417                if (unlikely(!p))
5418                        goto out_overflow;
5419                sec_flavor->flavor = be32_to_cpup(p);
5420
5421                if (sec_flavor->flavor == RPC_AUTH_GSS) {
5422                        status = decode_secinfo_gss(xdr, sec_flavor);
5423                        if (status)
5424                                goto out;
5425                }
5426                res->flavors->num_flavors++;
5427        }
5428
5429        status = 0;
5430out:
5431        return status;
5432out_overflow:
5433        print_overflow_msg(__func__, xdr);
5434        return -EIO;
5435}
5436
5437static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5438{
5439        int status = decode_op_hdr(xdr, OP_SECINFO);
5440        if (status)
5441                return status;
5442        return decode_secinfo_common(xdr, res);
5443}
5444
5445#if defined(CONFIG_NFS_V4_1)
5446static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5447{
5448        int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5449        if (status)
5450                return status;
5451        return decode_secinfo_common(xdr, res);
5452}
5453
5454static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5455{
5456        __be32 *p;
5457        uint32_t bitmap_words;
5458        unsigned int i;
5459
5460        p = xdr_inline_decode(xdr, 4);
5461        bitmap_words = be32_to_cpup(p++);
5462        if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5463                return -EIO;
5464        p = xdr_inline_decode(xdr, 4 * bitmap_words);
5465        for (i = 0; i < bitmap_words; i++)
5466                op_map->u.words[i] = be32_to_cpup(p++);
5467
5468        return 0;
5469}
5470
5471static int decode_exchange_id(struct xdr_stream *xdr,
5472                              struct nfs41_exchange_id_res *res)
5473{
5474        __be32 *p;
5475        uint32_t dummy;
5476        char *dummy_str;
5477        int status;
5478        uint32_t impl_id_count;
5479
5480        status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5481        if (status)
5482                return status;
5483
5484        p = xdr_inline_decode(xdr, 8);
5485        if (unlikely(!p))
5486                goto out_overflow;
5487        xdr_decode_hyper(p, &res->clientid);
5488        p = xdr_inline_decode(xdr, 12);
5489        if (unlikely(!p))
5490                goto out_overflow;
5491        res->seqid = be32_to_cpup(p++);
5492        res->flags = be32_to_cpup(p++);
5493
5494        res->state_protect.how = be32_to_cpup(p);
5495        switch (res->state_protect.how) {
5496        case SP4_NONE:
5497                break;
5498        case SP4_MACH_CRED:
5499                status = decode_op_map(xdr, &res->state_protect.enforce);
5500                if (status)
5501                        return status;
5502                status = decode_op_map(xdr, &res->state_protect.allow);
5503                if (status)
5504                        return status;
5505                break;
5506        default:
5507                WARN_ON_ONCE(1);
5508                return -EIO;
5509        }
5510
5511        /* server_owner4.so_minor_id */
5512        p = xdr_inline_decode(xdr, 8);
5513        if (unlikely(!p))
5514                goto out_overflow;
5515        p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5516
5517        /* server_owner4.so_major_id */
5518        status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5519        if (unlikely(status))
5520                return status;
5521        if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5522                return -EIO;
5523        memcpy(res->server_owner->major_id, dummy_str, dummy);
5524        res->server_owner->major_id_sz = dummy;
5525
5526        /* server_scope4 */
5527        status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5528        if (unlikely(status))
5529                return status;
5530        if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5531                return -EIO;
5532        memcpy(res->server_scope->server_scope, dummy_str, dummy);
5533        res->server_scope->server_scope_sz = dummy;
5534
5535        /* Implementation Id */
5536        p = xdr_inline_decode(xdr, 4);
5537        if (unlikely(!p))
5538                goto out_overflow;
5539        impl_id_count = be32_to_cpup(p++);
5540
5541        if (impl_id_count) {
5542                /* nii_domain */
5543                status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5544                if (unlikely(status))
5545                        return status;
5546                if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5547                        return -EIO;
5548                memcpy(res->impl_id->domain, dummy_str, dummy);
5549
5550                /* nii_name */
5551                status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5552                if (unlikely(status))
5553                        return status;
5554                if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5555                        return -EIO;
5556                memcpy(res->impl_id->name, dummy_str, dummy);
5557
5558                /* nii_date */
5559                p = xdr_inline_decode(xdr, 12);
5560                if (unlikely(!p))
5561                        goto out_overflow;
5562                p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5563                res->impl_id->date.nseconds = be32_to_cpup(p);
5564
5565                /* if there's more than one entry, ignore the rest */
5566        }
5567        return 0;
5568out_overflow:
5569        print_overflow_msg(__func__, xdr);
5570        return -EIO;
5571}
5572
5573static int decode_chan_attrs(struct xdr_stream *xdr,
5574                             struct nfs4_channel_attrs *attrs)
5575{
5576        __be32 *p;
5577        u32 nr_attrs, val;
5578
5579        p = xdr_inline_decode(xdr, 28);
5580        if (unlikely(!p))
5581                goto out_overflow;
5582        val = be32_to_cpup(p++);        /* headerpadsz */
5583        if (val)
5584                return -EINVAL;         /* no support for header padding yet */
5585        attrs->max_rqst_sz = be32_to_cpup(p++);
5586        attrs->max_resp_sz = be32_to_cpup(p++);
5587        attrs->max_resp_sz_cached = be32_to_cpup(p++);
5588        attrs->max_ops = be32_to_cpup(p++);
5589        attrs->max_reqs = be32_to_cpup(p++);
5590        nr_attrs = be32_to_cpup(p);
5591        if (unlikely(nr_attrs > 1)) {
5592                printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5593                        "count %u\n", __func__, nr_attrs);
5594                return -EINVAL;
5595        }
5596        if (nr_attrs == 1) {
5597                p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5598                if (unlikely(!p))
5599                        goto out_overflow;
5600        }
5601        return 0;
5602out_overflow:
5603        print_overflow_msg(__func__, xdr);
5604        return -EIO;
5605}
5606
5607static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5608{
5609        return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5610}
5611
5612static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5613                                struct nfs41_bind_conn_to_session_res *res)
5614{
5615        __be32 *p;
5616        int status;
5617
5618        status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5619        if (!status)
5620                status = decode_sessionid(xdr, &res->sessionid);
5621        if (unlikely(status))
5622                return status;
5623
5624        /* dir flags, rdma mode bool */
5625        p = xdr_inline_decode(xdr, 8);
5626        if (unlikely(!p))
5627                goto out_overflow;
5628
5629        res->dir = be32_to_cpup(p++);
5630        if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5631                return -EIO;
5632        if (be32_to_cpup(p) == 0)
5633                res->use_conn_in_rdma_mode = false;
5634        else
5635                res->use_conn_in_rdma_mode = true;
5636
5637        return 0;
5638out_overflow:
5639        print_overflow_msg(__func__, xdr);
5640        return -EIO;
5641}
5642
5643static int decode_create_session(struct xdr_stream *xdr,
5644                                 struct nfs41_create_session_res *res)
5645{
5646        __be32 *p;
5647        int status;
5648
5649        status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5650        if (!status)
5651                status = decode_sessionid(xdr, &res->sessionid);
5652        if (unlikely(status))
5653                return status;
5654
5655        /* seqid, flags */
5656        p = xdr_inline_decode(xdr, 8);
5657        if (unlikely(!p))
5658                goto out_overflow;
5659        res->seqid = be32_to_cpup(p++);
5660        res->flags = be32_to_cpup(p);
5661
5662        /* Channel attributes */
5663        status = decode_chan_attrs(xdr, &res->fc_attrs);
5664        if (!status)
5665                status = decode_chan_attrs(xdr, &res->bc_attrs);
5666        return status;
5667out_overflow:
5668        print_overflow_msg(__func__, xdr);
5669        return -EIO;
5670}
5671
5672static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5673{
5674        return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5675}
5676
5677static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5678{
5679        return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5680}
5681
5682static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5683{
5684        return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5685}
5686#endif /* CONFIG_NFS_V4_1 */
5687
5688static int decode_sequence(struct xdr_stream *xdr,
5689                           struct nfs4_sequence_res *res,
5690                           struct rpc_rqst *rqstp)
5691{
5692#if defined(CONFIG_NFS_V4_1)
5693        struct nfs4_session *session;
5694        struct nfs4_sessionid id;
5695        u32 dummy;
5696        int status;
5697        __be32 *p;
5698
5699        if (res->sr_slot == NULL)
5700                return 0;
5701        if (!res->sr_slot->table->session)
5702                return 0;
5703
5704        status = decode_op_hdr(xdr, OP_SEQUENCE);
5705        if (!status)
5706                status = decode_sessionid(xdr, &id);
5707        if (unlikely(status))
5708                goto out_err;
5709
5710        /*
5711         * If the server returns different values for sessionID, slotID or
5712         * sequence number, the server is looney tunes.
5713         */
5714        status = -EREMOTEIO;
5715        session = res->sr_slot->table->session;
5716
5717        if (memcmp(id.data, session->sess_id.data,
5718                   NFS4_MAX_SESSIONID_LEN)) {
5719                dprintk("%s Invalid session id\n", __func__);
5720                goto out_err;
5721        }
5722
5723        p = xdr_inline_decode(xdr, 20);
5724        if (unlikely(!p))
5725                goto out_overflow;
5726
5727        /* seqid */
5728        dummy = be32_to_cpup(p++);
5729        if (dummy != res->sr_slot->seq_nr) {
5730                dprintk("%s Invalid sequence number\n", __func__);
5731                goto out_err;
5732        }
5733        /* slot id */
5734        dummy = be32_to_cpup(p++);
5735        if (dummy != res->sr_slot->slot_nr) {
5736                dprintk("%s Invalid slot id\n", __func__);
5737                goto out_err;
5738        }
5739        /* highest slot id */
5740        res->sr_highest_slotid = be32_to_cpup(p++);
5741        /* target highest slot id */
5742        res->sr_target_highest_slotid = be32_to_cpup(p++);
5743        /* result flags */
5744        res->sr_status_flags = be32_to_cpup(p);
5745        status = 0;
5746out_err:
5747        res->sr_status = status;
5748        return status;
5749out_overflow:
5750        print_overflow_msg(__func__, xdr);
5751        status = -EIO;
5752        goto out_err;
5753#else  /* CONFIG_NFS_V4_1 */
5754        return 0;
5755#endif /* CONFIG_NFS_V4_1 */
5756}
5757
5758#if defined(CONFIG_NFS_V4_1)
5759static int decode_getdeviceinfo(struct xdr_stream *xdr,
5760                                struct nfs4_getdeviceinfo_res *res)
5761{
5762        struct pnfs_device *pdev = res->pdev;
5763        __be32 *p;
5764        uint32_t len, type;
5765        int status;
5766
5767        status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5768        if (status) {
5769                if (status == -ETOOSMALL) {
5770                        p = xdr_inline_decode(xdr, 4);
5771                        if (unlikely(!p))
5772                                goto out_overflow;
5773                        pdev->mincount = be32_to_cpup(p);
5774                        dprintk("%s: Min count too small. mincnt = %u\n",
5775                                __func__, pdev->mincount);
5776                }
5777                return status;
5778        }
5779
5780        p = xdr_inline_decode(xdr, 8);
5781        if (unlikely(!p))
5782                goto out_overflow;
5783        type = be32_to_cpup(p++);
5784        if (type != pdev->layout_type) {
5785                dprintk("%s: layout mismatch req: %u pdev: %u\n",
5786                        __func__, pdev->layout_type, type);
5787                return -EINVAL;
5788        }
5789        /*
5790         * Get the length of the opaque device_addr4. xdr_read_pages places
5791         * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5792         * and places the remaining xdr data in xdr_buf->tail
5793         */
5794        pdev->mincount = be32_to_cpup(p);
5795        if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5796                goto out_overflow;
5797
5798        /* Parse notification bitmap, verifying that it is zero. */
5799        p = xdr_inline_decode(xdr, 4);
5800        if (unlikely(!p))
5801                goto out_overflow;
5802        len = be32_to_cpup(p);
5803        if (len) {
5804                uint32_t i;
5805
5806                p = xdr_inline_decode(xdr, 4 * len);
5807                if (unlikely(!p))
5808                        goto out_overflow;
5809
5810                res->notification = be32_to_cpup(p++);
5811                for (i = 1; i < len; i++) {
5812                        if (be32_to_cpup(p++)) {
5813                                dprintk("%s: unsupported notification\n",
5814                                        __func__);
5815                                return -EIO;
5816                        }
5817                }
5818        }
5819        return 0;
5820out_overflow:
5821        print_overflow_msg(__func__, xdr);
5822        return -EIO;
5823}
5824
5825static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5826                            struct nfs4_layoutget_res *res)
5827{
5828        __be32 *p;
5829        int status;
5830        u32 layout_count;
5831        u32 recvd;
5832
5833        status = decode_op_hdr(xdr, OP_LAYOUTGET);
5834        if (status)
5835                return status;
5836        p = xdr_inline_decode(xdr, 4);
5837        if (unlikely(!p))
5838                goto out_overflow;
5839        res->return_on_close = be32_to_cpup(p);
5840        decode_stateid(xdr, &res->stateid);
5841        p = xdr_inline_decode(xdr, 4);
5842        if (unlikely(!p))
5843                goto out_overflow;
5844        layout_count = be32_to_cpup(p);
5845        if (!layout_count) {
5846                dprintk("%s: server responded with empty layout array\n",
5847                        __func__);
5848                return -EINVAL;
5849        }
5850
5851        p = xdr_inline_decode(xdr, 28);
5852        if (unlikely(!p))
5853                goto out_overflow;
5854        p = xdr_decode_hyper(p, &res->range.offset);
5855        p = xdr_decode_hyper(p, &res->range.length);
5856        res->range.iomode = be32_to_cpup(p++);
5857        res->type = be32_to_cpup(p++);
5858        res->layoutp->len = be32_to_cpup(p);
5859
5860        dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5861                __func__,
5862                (unsigned long)res->range.offset,
5863                (unsigned long)res->range.length,
5864                res->range.iomode,
5865                res->type,
5866                res->layoutp->len);
5867
5868        recvd = xdr_read_pages(xdr, res->layoutp->len);
5869        if (res->layoutp->len > recvd) {
5870                dprintk("NFS: server cheating in layoutget reply: "
5871                                "layout len %u > recvd %u\n",
5872                                res->layoutp->len, recvd);
5873                return -EINVAL;
5874        }
5875
5876        if (layout_count > 1) {
5877                /* We only handle a length one array at the moment.  Any
5878                 * further entries are just ignored.  Note that this means
5879                 * the client may see a response that is less than the
5880                 * minimum it requested.
5881                 */
5882                dprintk("%s: server responded with %d layouts, dropping tail\n",
5883                        __func__, layout_count);
5884        }
5885
5886        return 0;
5887out_overflow:
5888        print_overflow_msg(__func__, xdr);
5889        return -EIO;
5890}
5891
5892static int decode_layoutreturn(struct xdr_stream *xdr,
5893                               struct nfs4_layoutreturn_res *res)
5894{
5895        __be32 *p;
5896        int status;
5897
5898        status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5899        if (status)
5900                return status;
5901        p = xdr_inline_decode(xdr, 4);
5902        if (unlikely(!p))
5903                goto out_overflow;
5904        res->lrs_present = be32_to_cpup(p);
5905        if (res->lrs_present)
5906                status = decode_stateid(xdr, &res->stateid);
5907        return status;
5908out_overflow:
5909        print_overflow_msg(__func__, xdr);
5910        return -EIO;
5911}
5912
5913static int decode_layoutcommit(struct xdr_stream *xdr,
5914                               struct rpc_rqst *req,
5915                               struct nfs4_layoutcommit_res *res)
5916{
5917        __be32 *p;
5918        __u32 sizechanged;
5919        int status;
5920
5921        status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5922        res->status = status;
5923        if (status)
5924                return status;
5925
5926        p = xdr_inline_decode(xdr, 4);
5927        if (unlikely(!p))
5928                goto out_overflow;
5929        sizechanged = be32_to_cpup(p);
5930
5931        if (sizechanged) {
5932                /* throw away new size */
5933                p = xdr_inline_decode(xdr, 8);
5934                if (unlikely(!p))
5935                        goto out_overflow;
5936        }
5937        return 0;
5938out_overflow:
5939        print_overflow_msg(__func__, xdr);
5940        return -EIO;
5941}
5942
5943static int decode_test_stateid(struct xdr_stream *xdr,
5944                               struct nfs41_test_stateid_res *res)
5945{
5946        __be32 *p;
5947        int status;
5948        int num_res;
5949
5950        status = decode_op_hdr(xdr, OP_TEST_STATEID);
5951        if (status)
5952                return status;
5953
5954        p = xdr_inline_decode(xdr, 4);
5955        if (unlikely(!p))
5956                goto out_overflow;
5957        num_res = be32_to_cpup(p++);
5958        if (num_res != 1)
5959                goto out;
5960
5961        p = xdr_inline_decode(xdr, 4);
5962        if (unlikely(!p))
5963                goto out_overflow;
5964        res->status = be32_to_cpup(p++);
5965
5966        return status;
5967out_overflow:
5968        print_overflow_msg(__func__, xdr);
5969out:
5970        return -EIO;
5971}
5972
5973static int decode_free_stateid(struct xdr_stream *xdr,
5974                               struct nfs41_free_stateid_res *res)
5975{
5976        res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
5977        return res->status;
5978}
5979#endif /* CONFIG_NFS_V4_1 */
5980
5981/*
5982 * END OF "GENERIC" DECODE ROUTINES.
5983 */
5984
5985/*
5986 * Decode OPEN_DOWNGRADE response
5987 */
5988static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
5989                                       struct xdr_stream *xdr,
5990                                       struct nfs_closeres *res)
5991{
5992        struct compound_hdr hdr;
5993        int status;
5994
5995        status = decode_compound_hdr(xdr, &hdr);
5996        if (status)
5997                goto out;
5998        status = decode_sequence(xdr, &res->seq_res, rqstp);
5999        if (status)
6000                goto out;

6001        status = decode_putfh(xdr);
6002        if (status)
6003                goto out;
6004        status = decode_open_downgrade(xdr, res);
6005        if (status != 0)
6006                goto out;
6007        decode_getfattr(xdr, res->fattr, res->server);
6008out:
6009        return status;
6010}
6011
6012/*
6013 * Decode ACCESS response
6014 */
6015static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6016                               struct nfs4_accessres *res)
6017{
6018        struct compound_hdr hdr;
6019        int status;
6020
6021        status = decode_compound_hdr(xdr, &hdr);
6022        if (status)
6023                goto out;
6024        status = decode_sequence(xdr, &res->seq_res, rqstp);
6025        if (status)
6026                goto out;
6027        status = decode_putfh(xdr);
6028        if (status != 0)
6029                goto out;
6030        status = decode_access(xdr, &res->supported, &res->access);
6031        if (status != 0)
6032                goto out;
6033        decode_getfattr(xdr, res->fattr, res->server);
6034out:
6035        return status;
6036}
6037
6038/*
6039 * Decode LOOKUP response
6040 */
6041static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6042                               struct nfs4_lookup_res *res)
6043{
6044        struct compound_hdr hdr;
6045        int status;
6046
6047        status = decode_compound_hdr(xdr, &hdr);
6048        if (status)
6049                goto out;
6050        status = decode_sequence(xdr, &res->seq_res, rqstp);
6051        if (status)
6052                goto out;
6053        status = decode_putfh(xdr);
6054        if (status)
6055                goto out;
6056        status = decode_lookup(xdr);
6057        if (status)
6058                goto out;
6059        status = decode_getfh(xdr, res->fh);
6060        if (status)
6061                goto out;
6062        status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6063out:
6064        return status;
6065}
6066
6067/*
6068 * Decode LOOKUP_ROOT response
6069 */
6070static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6071                                    struct xdr_stream *xdr,
6072                                    struct nfs4_lookup_res *res)
6073{
6074        struct compound_hdr hdr;
6075        int status;
6076
6077        status = decode_compound_hdr(xdr, &hdr);
6078        if (status)
6079                goto out;
6080        status = decode_sequence(xdr, &res->seq_res, rqstp);
6081        if (status)
6082                goto out;
6083        status = decode_putrootfh(xdr);
6084        if (status)
6085                goto out;
6086        status = decode_getfh(xdr, res->fh);
6087        if (status == 0)
6088                status = decode_getfattr_label(xdr, res->fattr,
6089                                                res->label, res->server);
6090out:
6091        return status;
6092}
6093
6094/*
6095 * Decode REMOVE response
6096 */
6097static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6098                               struct nfs_removeres *res)
6099{
6100        struct compound_hdr hdr;
6101        int status;
6102
6103        status = decode_compound_hdr(xdr, &hdr);
6104        if (status)
6105                goto out;
6106        status = decode_sequence(xdr, &res->seq_res, rqstp);
6107        if (status)
6108                goto out;
6109        status = decode_putfh(xdr);
6110        if (status)
6111                goto out;
6112        status = decode_remove(xdr, &res->cinfo);
6113out:
6114        return status;
6115}
6116
6117/*
6118 * Decode RENAME response
6119 */
6120static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6121                               struct nfs_renameres *res)
6122{
6123        struct compound_hdr hdr;
6124        int status;
6125
6126        status = decode_compound_hdr(xdr, &hdr);
6127        if (status)
6128                goto out;
6129        status = decode_sequence(xdr, &res->seq_res, rqstp);
6130        if (status)
6131                goto out;
6132        status = decode_putfh(xdr);
6133        if (status)
6134                goto out;
6135        status = decode_savefh(xdr);
6136        if (status)
6137                goto out;
6138        status = decode_putfh(xdr);
6139        if (status)
6140                goto out;
6141        status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6142out:
6143        return status;
6144}
6145
6146/*
6147 * Decode LINK response
6148 */
6149static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6150                             struct nfs4_link_res *res)
6151{
6152        struct compound_hdr hdr;
6153        int status;
6154
6155        status = decode_compound_hdr(xdr, &hdr);
6156        if (status)
6157                goto out;
6158        status = decode_sequence(xdr, &res->seq_res, rqstp);
6159        if (status)
6160                goto out;
6161        status = decode_putfh(xdr);
6162        if (status)
6163                goto out;
6164        status = decode_savefh(xdr);
6165        if (status)
6166                goto out;
6167        status = decode_putfh(xdr);
6168        if (status)
6169                goto out;
6170        status = decode_link(xdr, &res->cinfo);
6171        if (status)
6172                goto out;
6173        /*
6174         * Note order: OP_LINK leaves the directory as the current
6175         *             filehandle.
6176         */
6177        status = decode_restorefh(xdr);
6178        if (status)
6179                goto out;
6180        decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6181out:
6182        return status;
6183}
6184
6185/*
6186 * Decode CREATE response
6187 */
6188static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6189                               struct nfs4_create_res *res)
6190{
6191        struct compound_hdr hdr;
6192        int status;
6193
6194        status = decode_compound_hdr(xdr, &hdr);
6195        if (status)
6196                goto out;
6197        status = decode_sequence(xdr, &res->seq_res, rqstp);
6198        if (status)
6199                goto out;
6200        status = decode_putfh(xdr);
6201        if (status)
6202                goto out;
6203        status = decode_create(xdr, &res->dir_cinfo);
6204        if (status)
6205                goto out;
6206        status = decode_getfh(xdr, res->fh);
6207        if (status)
6208                goto out;
6209        decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6210out:
6211        return status;
6212}
6213
6214/*
6215 * Decode SYMLINK response
6216 */
6217static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6218                                struct nfs4_create_res *res)
6219{
6220        return nfs4_xdr_dec_create(rqstp, xdr, res);
6221}
6222
6223/*
6224 * Decode GETATTR response
6225 */
6226static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6227                                struct nfs4_getattr_res *res)
6228{
6229        struct compound_hdr hdr;
6230        int status;
6231
6232        status = decode_compound_hdr(xdr, &hdr);
6233        if (status)
6234                goto out;
6235        status = decode_sequence(xdr, &res->seq_res, rqstp);
6236        if (status)
6237                goto out;
6238        status = decode_putfh(xdr);
6239        if (status)
6240                goto out;
6241        status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6242out:
6243        return status;
6244}
6245
6246/*
6247 * Encode an SETACL request
6248 */
6249static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6250                                struct nfs_setaclargs *args)
6251{
6252        struct compound_hdr hdr = {
6253                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6254        };
6255
6256        encode_compound_hdr(xdr, req, &hdr);
6257        encode_sequence(xdr, &args->seq_args, &hdr);
6258        encode_putfh(xdr, args->fh, &hdr);
6259        encode_setacl(xdr, args, &hdr);
6260        encode_nops(&hdr);
6261}
6262
6263/*
6264 * Decode SETACL response
6265 */
6266static int
6267nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6268                    struct nfs_setaclres *res)
6269{
6270        struct compound_hdr hdr;
6271        int status;
6272
6273        status = decode_compound_hdr(xdr, &hdr);
6274        if (status)
6275                goto out;
6276        status = decode_sequence(xdr, &res->seq_res, rqstp);
6277        if (status)
6278                goto out;
6279        status = decode_putfh(xdr);
6280        if (status)
6281                goto out;
6282        status = decode_setattr(xdr);
6283out:
6284        return status;
6285}
6286
6287/*
6288 * Decode GETACL response
6289 */
6290static int
6291nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6292                    struct nfs_getaclres *res)
6293{
6294        struct compound_hdr hdr;
6295        int status;
6296
6297        if (res->acl_scratch != NULL) {
6298                void *p = page_address(res->acl_scratch);
6299                xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6300        }
6301        status = decode_compound_hdr(xdr, &hdr);
6302        if (status)
6303                goto out;
6304        status = decode_sequence(xdr, &res->seq_res, rqstp);
6305        if (status)
6306                goto out;
6307        status = decode_putfh(xdr);
6308        if (status)
6309                goto out;
6310        status = decode_getacl(xdr, rqstp, res);
6311
6312out:
6313        return status;
6314}
6315
6316/*
6317 * Decode CLOSE response
6318 */
6319static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6320                              struct nfs_closeres *res)
6321{
6322        struct compound_hdr hdr;
6323        int status;
6324
6325        status = decode_compound_hdr(xdr, &hdr);
6326        if (status)
6327                goto out;
6328        status = decode_sequence(xdr, &res->seq_res, rqstp);
6329        if (status)
6330                goto out;
6331        status = decode_putfh(xdr);
6332        if (status)
6333                goto out;
6334        status = decode_close(xdr, res);
6335        if (status != 0)
6336                goto out;
6337        /*
6338         * Note: Server may do delete on close for this file
6339         *      in which case the getattr call will fail with
6340         *      an ESTALE error. Shouldn't be a problem,
6341         *      though, since fattr->valid will remain unset.
6342         */
6343        decode_getfattr(xdr, res->fattr, res->server);
6344out:
6345        return status;
6346}
6347
6348/*
6349 * Decode OPEN response
6350 */
6351static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6352                             struct nfs_openres *res)
6353{
6354        struct compound_hdr hdr;
6355        int status;
6356
6357        status = decode_compound_hdr(xdr, &hdr);
6358        if (status)
6359                goto out;
6360        status = decode_sequence(xdr, &res->seq_res, rqstp);
6361        if (status)
6362                goto out;
6363        status = decode_putfh(xdr);
6364        if (status)
6365                goto out;
6366        status = decode_open(xdr, res);
6367        if (status)
6368                goto out;
6369        status = decode_getfh(xdr, &res->fh);
6370        if (status)
6371                goto out;
6372        if (res->access_request)
6373                decode_access(xdr, &res->access_supported, &res->access_result);
6374        decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6375out:
6376        return status;
6377}
6378
6379/*
6380 * Decode OPEN_CONFIRM response
6381 */
6382static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6383                                     struct xdr_stream *xdr,
6384                                     struct nfs_open_confirmres *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_putfh(xdr);
6393        if (status)
6394                goto out;
6395        status = decode_open_confirm(xdr, res);
6396out:
6397        return status;
6398}
6399
6400/*
6401 * Decode OPEN response
6402 */
6403static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6404                                    struct xdr_stream *xdr,
6405                                    struct nfs_openres *res)
6406{
6407        struct compound_hdr hdr;
6408        int status;
6409
6410        status = decode_compound_hdr(xdr, &hdr);
6411        if (status)
6412                goto out;
6413        status = decode_sequence(xdr, &res->seq_res, rqstp);
6414        if (status)
6415                goto out;
6416        status = decode_putfh(xdr);
6417        if (status)
6418                goto out;
6419        status = decode_open(xdr, res);
6420        if (status)
6421                goto out;
6422        if (res->access_request)
6423                decode_access(xdr, &res->access_supported, &res->access_result);
6424        decode_getfattr(xdr, res->f_attr, res->server);
6425out:
6426        return status;
6427}
6428
6429/*
6430 * Decode SETATTR response
6431 */
6432static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6433                                struct xdr_stream *xdr,
6434                                struct nfs_setattrres *res)
6435{
6436        struct compound_hdr hdr;
6437        int status;
6438
6439        status = decode_compound_hdr(xdr, &hdr);
6440        if (status)
6441                goto out;
6442        status = decode_sequence(xdr, &res->seq_res, rqstp);
6443        if (status)
6444                goto out;
6445        status = decode_putfh(xdr);
6446        if (status)
6447                goto out;
6448        status = decode_setattr(xdr);
6449        if (status)
6450                goto out;
6451        decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6452out:
6453        return status;
6454}
6455
6456/*
6457 * Decode LOCK response
6458 */
6459static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6460                             struct nfs_lock_res *res)
6461{
6462        struct compound_hdr hdr;
6463        int status;
6464
6465        status = decode_compound_hdr(xdr, &hdr);
6466        if (status)
6467                goto out;
6468        status = decode_sequence(xdr, &res->seq_res, rqstp);
6469        if (status)
6470                goto out;
6471        status = decode_putfh(xdr);
6472        if (status)
6473                goto out;
6474        status = decode_lock(xdr, res);
6475out:
6476        return status;
6477}
6478
6479/*
6480 * Decode LOCKT response
6481 */
6482static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6483                              struct nfs_lockt_res *res)
6484{
6485        struct compound_hdr hdr;
6486        int status;
6487
6488        status = decode_compound_hdr(xdr, &hdr);
6489        if (status)
6490                goto out;
6491        status = decode_sequence(xdr, &res->seq_res, rqstp);
6492        if (status)
6493                goto out;
6494        status = decode_putfh(xdr);
6495        if (status)
6496                goto out;
6497        status = decode_lockt(xdr, res);
6498out:
6499        return status;
6500}
6501
6502/*
6503 * Decode LOCKU response
6504 */
6505static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6506                              struct nfs_locku_res *res)
6507{
6508        struct compound_hdr hdr;
6509        int status;
6510
6511        status = decode_compound_hdr(xdr, &hdr);
6512        if (status)
6513                goto out;
6514        status = decode_sequence(xdr, &res->seq_res, rqstp);
6515        if (status)
6516                goto out;
6517        status = decode_putfh(xdr);
6518        if (status)
6519                goto out;
6520        status = decode_locku(xdr, res);
6521out:
6522        return status;
6523}
6524
6525static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6526                                          struct xdr_stream *xdr, void *dummy)
6527{
6528        struct compound_hdr hdr;
6529        int status;
6530
6531        status = decode_compound_hdr(xdr, &hdr);
6532        if (!status)
6533                status = decode_release_lockowner(xdr);
6534        return status;
6535}
6536
6537/*
6538 * Decode READLINK response
6539 */
6540static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6541                                 struct xdr_stream *xdr,
6542                                 struct nfs4_readlink_res *res)
6543{
6544        struct compound_hdr hdr;
6545        int status;
6546
6547        status = decode_compound_hdr(xdr, &hdr);
6548        if (status)
6549                goto out;
6550        status = decode_sequence(xdr, &res->seq_res, rqstp);
6551        if (status)
6552                goto out;
6553        status = decode_putfh(xdr);
6554        if (status)
6555                goto out;
6556        status = decode_readlink(xdr, rqstp);
6557out:
6558        return status;
6559}
6560
6561/*
6562 * Decode READDIR response
6563 */
6564static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6565                                struct nfs4_readdir_res *res)
6566{
6567        struct compound_hdr hdr;
6568        int status;
6569
6570        status = decode_compound_hdr(xdr, &hdr);
6571        if (status)
6572                goto out;
6573        status = decode_sequence(xdr, &res->seq_res, rqstp);
6574        if (status)
6575                goto out;
6576        status = decode_putfh(xdr);
6577        if (status)
6578                goto out;
6579        status = decode_readdir(xdr, rqstp, res);
6580out:
6581        return status;
6582}
6583
6584/*
6585 * Decode Read response
6586 */
6587static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6588                             struct nfs_pgio_res *res)
6589{
6590        struct compound_hdr hdr;
6591        int status;
6592
6593        status = decode_compound_hdr(xdr, &hdr);
6594        res->op_status = hdr.status;
6595        if (status)
6596                goto out;
6597        status = decode_sequence(xdr, &res->seq_res, rqstp);
6598        if (status)
6599                goto out;
6600        status = decode_putfh(xdr);
6601        if (status)
6602                goto out;
6603        status = decode_read(xdr, rqstp, res);
6604        if (!status)
6605                status = res->count;
6606out:
6607        return status;
6608}
6609
6610/*
6611 * Decode WRITE response
6612 */
6613static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6614                              struct nfs_pgio_res *res)
6615{
6616        struct compound_hdr hdr;
6617        int status;
6618
6619        status = decode_compound_hdr(xdr, &hdr);
6620        res->op_status = hdr.status;
6621        if (status)
6622                goto out;
6623        status = decode_sequence(xdr, &res->seq_res, rqstp);
6624        if (status)
6625                goto out;
6626        status = decode_putfh(xdr);
6627        if (status)
6628                goto out;
6629        status = decode_write(xdr, res);
6630        if (status)
6631                goto out;
6632        if (res->fattr)
6633                decode_getfattr(xdr, res->fattr, res->server);
6634        if (!status)
6635                status = res->count;
6636out:
6637        return status;
6638}
6639
6640/*
6641 * Decode COMMIT response
6642 */
6643static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6644                               struct nfs_commitres *res)
6645{
6646        struct compound_hdr hdr;
6647        int status;
6648
6649        status = decode_compound_hdr(xdr, &hdr);
6650        res->op_status = hdr.status;
6651        if (status)
6652                goto out;
6653        status = decode_sequence(xdr, &res->seq_res, rqstp);
6654        if (status)
6655                goto out;
6656        status = decode_putfh(xdr);
6657        if (status)
6658                goto out;
6659        status = decode_commit(xdr, res);
6660out:
6661        return status;
6662}
6663
6664/*
6665 * Decode FSINFO response
6666 */
6667static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6668                               struct nfs4_fsinfo_res *res)
6669{
6670        struct compound_hdr hdr;
6671        int status;
6672
6673        status = decode_compound_hdr(xdr, &hdr);
6674        if (!status)
6675                status = decode_sequence(xdr, &res->seq_res, req);
6676        if (!status)
6677                status = decode_putfh(xdr);
6678        if (!status)
6679                status = decode_fsinfo(xdr, res->fsinfo);
6680        return status;
6681}
6682
6683/*
6684 * Decode PATHCONF response
6685 */
6686static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6687                                 struct nfs4_pathconf_res *res)
6688{
6689        struct compound_hdr hdr;
6690        int status;
6691
6692        status = decode_compound_hdr(xdr, &hdr);
6693        if (!status)
6694                status = decode_sequence(xdr, &res->seq_res, req);
6695        if (!status)
6696                status = decode_putfh(xdr);
6697        if (!status)
6698                status = decode_pathconf(xdr, res->pathconf);
6699        return status;
6700}
6701
6702/*
6703 * Decode STATFS response
6704 */
6705static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6706                               struct nfs4_statfs_res *res)
6707{
6708        struct compound_hdr hdr;
6709        int status;
6710
6711        status = decode_compound_hdr(xdr, &hdr);
6712        if (!status)
6713                status = decode_sequence(xdr, &res->seq_res, req);
6714        if (!status)
6715                status = decode_putfh(xdr);
6716        if (!status)
6717                status = decode_statfs(xdr, res->fsstat);
6718        return status;
6719}
6720
6721/*
6722 * Decode GETATTR_BITMAP response
6723 */
6724static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6725                                    struct xdr_stream *xdr,
6726                                    struct nfs4_server_caps_res *res)
6727{
6728        struct compound_hdr hdr;
6729        int status;
6730
6731        status = decode_compound_hdr(xdr, &hdr);
6732        if (status)
6733                goto out;
6734        status = decode_sequence(xdr, &res->seq_res, req);
6735        if (status)
6736                goto out;
6737        status = decode_putfh(xdr);
6738        if (status)
6739                goto out;
6740        status = decode_server_caps(xdr, res);
6741out:
6742        return status;
6743}
6744
6745/*
6746 * Decode RENEW response
6747 */
6748static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6749                              void *__unused)
6750{
6751        struct compound_hdr hdr;
6752        int status;
6753
6754        status = decode_compound_hdr(xdr, &hdr);
6755        if (!status)
6756                status = decode_renew(xdr);
6757        return status;
6758}
6759
6760/*
6761 * Decode SETCLIENTID response
6762 */
6763static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6764                                    struct xdr_stream *xdr,
6765                                    struct nfs4_setclientid_res *res)
6766{
6767        struct compound_hdr hdr;
6768        int status;
6769
6770        status = decode_compound_hdr(xdr, &hdr);
6771        if (!status)
6772                status = decode_setclientid(xdr, res);
6773        return status;
6774}
6775
6776/*
6777 * Decode SETCLIENTID_CONFIRM response
6778 */
6779static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6780                                            struct xdr_stream *xdr)
6781{
6782        struct compound_hdr hdr;
6783        int status;
6784
6785        status = decode_compound_hdr(xdr, &hdr);
6786        if (!status)
6787                status = decode_setclientid_confirm(xdr);
6788        return status;
6789}
6790
6791/*
6792 * Decode DELEGRETURN response
6793 */
6794static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6795                                    struct xdr_stream *xdr,
6796                                    struct nfs4_delegreturnres *res)
6797{
6798        struct compound_hdr hdr;
6799        int status;
6800
6801        status = decode_compound_hdr(xdr, &hdr);
6802        if (status)
6803                goto out;
6804        status = decode_sequence(xdr, &res->seq_res, rqstp);
6805        if (status)
6806                goto out;
6807        status = decode_putfh(xdr);
6808        if (status != 0)
6809                goto out;
6810        status = decode_getfattr(xdr, res->fattr, res->server);
6811        if (status != 0)
6812                goto out;
6813        status = decode_delegreturn(xdr);
6814out:
6815        return status;
6816}
6817
6818/*
6819 * Decode FS_LOCATIONS response
6820 */
6821static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6822                                     struct xdr_stream *xdr,
6823                                     struct nfs4_fs_locations_res *res)
6824{
6825        struct compound_hdr hdr;
6826        int status;
6827
6828        status = decode_compound_hdr(xdr, &hdr);
6829        if (status)
6830                goto out;
6831        status = decode_sequence(xdr, &res->seq_res, req);
6832        if (status)
6833                goto out;
6834        status = decode_putfh(xdr);
6835        if (status)
6836                goto out;
6837        if (res->migration) {
6838                xdr_enter_page(xdr, PAGE_SIZE);
6839                status = decode_getfattr_generic(xdr,
6840                                        &res->fs_locations->fattr,
6841                                         NULL, res->fs_locations,
6842                                         NULL, res->fs_locations->server);
6843                if (status)
6844                        goto out;
6845                if (res->renew)
6846                        status = decode_renew(xdr);
6847        } else {
6848                status = decode_lookup(xdr);
6849                if (status)
6850                        goto out;
6851                xdr_enter_page(xdr, PAGE_SIZE);
6852                status = decode_getfattr_generic(xdr,
6853                                        &res->fs_locations->fattr,
6854                                         NULL, res->fs_locations,
6855                                         NULL, res->fs_locations->server);
6856        }
6857out:
6858        return status;
6859}
6860
6861/*
6862 * Decode SECINFO response
6863 */
6864static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6865                                struct xdr_stream *xdr,
6866                                struct nfs4_secinfo_res *res)
6867{
6868        struct compound_hdr hdr;
6869        int status;
6870
6871        status = decode_compound_hdr(xdr, &hdr);
6872        if (status)
6873                goto out;
6874        status = decode_sequence(xdr, &res->seq_res, rqstp);
6875        if (status)
6876                goto out;
6877        status = decode_putfh(xdr);
6878        if (status)
6879                goto out;
6880        status = decode_secinfo(xdr, res);
6881out:
6882        return status;
6883}
6884
6885/*
6886 * Decode FSID_PRESENT response
6887 */
6888static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
6889                                     struct xdr_stream *xdr,
6890                                     struct nfs4_fsid_present_res *res)
6891{
6892        struct compound_hdr hdr;
6893        int status;
6894
6895        status = decode_compound_hdr(xdr, &hdr);
6896        if (status)
6897                goto out;
6898        status = decode_sequence(xdr, &res->seq_res, rqstp);
6899        if (status)
6900                goto out;
6901        status = decode_putfh(xdr);
6902        if (status)
6903                goto out;
6904        status = decode_getfh(xdr, res->fh);
6905        if (status)
6906                goto out;
6907        if (res->renew)
6908                status = decode_renew(xdr);
6909out:
6910        return status;
6911}
6912
6913#if defined(CONFIG_NFS_V4_1)
6914/*
6915 * Decode BIND_CONN_TO_SESSION response
6916 */
6917static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
6918                                        struct xdr_stream *xdr,
6919                                        void *res)
6920{
6921        struct compound_hdr hdr;
6922        int status;
6923
6924        status = decode_compound_hdr(xdr, &hdr);
6925        if (!status)
6926                status = decode_bind_conn_to_session(xdr, res);
6927        return status;
6928}
6929
6930/*
6931 * Decode EXCHANGE_ID response
6932 */
6933static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
6934                                    struct xdr_stream *xdr,
6935                                    void *res)
6936{
6937        struct compound_hdr hdr;
6938        int status;
6939
6940        status = decode_compound_hdr(xdr, &hdr);
6941        if (!status)
6942                status = decode_exchange_id(xdr, res);
6943        return status;
6944}
6945
6946/*
6947 * Decode CREATE_SESSION response
6948 */
6949static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
6950                                       struct xdr_stream *xdr,
6951                                       struct nfs41_create_session_res *res)
6952{
6953        struct compound_hdr hdr;
6954        int status;
6955
6956        status = decode_compound_hdr(xdr, &hdr);
6957        if (!status)
6958                status = decode_create_session(xdr, res);
6959        return status;
6960}
6961
6962/*
6963 * Decode DESTROY_SESSION response
6964 */
6965static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
6966                                        struct xdr_stream *xdr,
6967                                        void *res)
6968{
6969        struct compound_hdr hdr;
6970        int status;
6971
6972        status = decode_compound_hdr(xdr, &hdr);
6973        if (!status)
6974                status = decode_destroy_session(xdr, res);
6975        return status;
6976}
6977
6978/*
6979 * Decode DESTROY_CLIENTID response
6980 */
6981static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
6982                                        struct xdr_stream *xdr,
6983                                        void *res)
6984{
6985        struct compound_hdr hdr;
6986        int status;
6987
6988        status = decode_compound_hdr(xdr, &hdr);
6989        if (!status)
6990                status = decode_destroy_clientid(xdr, res);
6991        return status;
6992}
6993
6994/*
6995 * Decode SEQUENCE response
6996 */
6997static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
6998                                 struct xdr_stream *xdr,
6999                                 struct nfs4_sequence_res *res)
7000{

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