LXR linux/fs/nfs/nfs4xdr.c

   1/*
   2 *  fs/nfs/nfs4xdr.c
   3 *
   4 *  Client-side XDR for NFSv4.
   5 *
   6 *  Copyright (c) 2002 The Regents of the University of Michigan.
   7 *  All rights reserved.
   8 *
   9 *  Kendrick Smith <kmsmith@umich.edu>
  10 *  Andy Adamson   <andros@umich.edu>
  11 *
  12 *  Redistribution and use in source and binary forms, with or without
  13 *  modification, are permitted provided that the following conditions
  14 *  are met:
  15 *
  16 *  1. Redistributions of source code must retain the above copyright
  17 *     notice, this list of conditions and the following disclaimer.
  18 *  2. Redistributions in binary form must reproduce the above copyright
  19 *     notice, this list of conditions and the following disclaimer in the
  20 *     documentation and/or other materials provided with the distribution.
  21 *  3. Neither the name of the University nor the names of its
  22 *     contributors may be used to endorse or promote products derived
  23 *     from this software without specific prior written permission.
  24 *
  25 *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  26 *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  27 *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  28 *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  29 *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30 *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31 *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  32 *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  33 *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  34 *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  35 *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36 */
  37
  38#include <linux/param.h>
  39#include <linux/time.h>
  40#include <linux/mm.h>
  41#include <linux/errno.h>
  42#include <linux/string.h>
  43#include <linux/in.h>
  44#include <linux/pagemap.h>
  45#include <linux/proc_fs.h>
  46#include <linux/kdev_t.h>
  47#include <linux/module.h>
  48#include <linux/utsname.h>
  49#include <linux/sunrpc/clnt.h>
  50#include <linux/sunrpc/msg_prot.h>
  51#include <linux/sunrpc/gss_api.h>
  52#include <linux/nfs.h>
  53#include <linux/nfs4.h>
  54#include <linux/nfs_fs.h>
  55#include <linux/fs_struct.h>
  56
  57#include "nfs4_fs.h"
  58#include "internal.h"
  59#include "nfs4idmap.h"
  60#include "nfs4session.h"
  61#include "pnfs.h"
  62#include "netns.h"
  63
  64#define NFSDBG_FACILITY         NFSDBG_XDR
  65
  66/* Mapping from NFS error code to "errno" error code. */
  67#define errno_NFSERR_IO         EIO
  68
  69static int nfs4_stat_to_errno(int);
  70
  71/* NFSv4 COMPOUND tags are only wanted for debugging purposes */
  72#ifdef DEBUG
  73#define NFS4_MAXTAGLEN          20
  74#else
  75#define NFS4_MAXTAGLEN          0
  76#endif
  77
  78/* lock,open owner id:
  79 * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT  >> 2)
  80 */
  81#define open_owner_id_maxsz     (1 + 2 + 1 + 1 + 2)
  82#define lock_owner_id_maxsz     (1 + 1 + 4)
  83#define decode_lockowner_maxsz  (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  84#define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  85#define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  86#define op_encode_hdr_maxsz     (1)
  87#define op_decode_hdr_maxsz     (2)
  88#define encode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  89#define decode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  90#define encode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  91#define decode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  92#define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
  93                                (NFS4_FHSIZE >> 2))
  94#define decode_putfh_maxsz      (op_decode_hdr_maxsz)
  95#define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
  96#define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
  97#define encode_getfh_maxsz      (op_encode_hdr_maxsz)
  98#define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
  99                                ((3+NFS4_FHSIZE) >> 2))
 100#define nfs4_fattr_bitmap_maxsz 4
 101#define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
 102#define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
 103#define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
 104#define nfs4_owner_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 105#define nfs4_group_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 106#ifdef CONFIG_NFS_V4_SECURITY_LABEL
 107/* PI(4 bytes) + LFS(4 bytes) + 1(for null terminator?) + MAXLABELLEN */
 108#define nfs4_label_maxsz        (4 + 4 + 1 + XDR_QUADLEN(NFS4_MAXLABELLEN))
 109#else
 110#define nfs4_label_maxsz        0
 111#endif
 112/* We support only one layout type per file system */
 113#define decode_mdsthreshold_maxsz (1 + 1 + nfs4_fattr_bitmap_maxsz + 1 + 8)
 114/* This is based on getfattr, which uses the most attributes: */
 115#define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
 116                                3 + 3 + 3 + nfs4_owner_maxsz + \
 117                                nfs4_group_maxsz + nfs4_label_maxsz + \
 118                                 decode_mdsthreshold_maxsz))
 119#define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
 120                                nfs4_fattr_value_maxsz)
 121#define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
 122#define encode_attrs_maxsz      (nfs4_fattr_bitmap_maxsz + \
 123                                 1 + 2 + 1 + \
 124                                nfs4_owner_maxsz + \
 125                                nfs4_group_maxsz + \
 126                                nfs4_label_maxsz + \
 127                                4 + 4)
 128#define encode_savefh_maxsz     (op_encode_hdr_maxsz)
 129#define decode_savefh_maxsz     (op_decode_hdr_maxsz)
 130#define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
 131#define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 132#define encode_fsinfo_maxsz     (encode_getattr_maxsz)
 133/* The 5 accounts for the PNFS attributes, and assumes that at most three
 134 * layout types will be returned.
 135 */
 136#define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + \
 137                                 nfs4_fattr_bitmap_maxsz + 4 + 8 + 5)
 138#define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 139#define decode_renew_maxsz      (op_decode_hdr_maxsz)
 140#define encode_setclientid_maxsz \
 141                                (op_encode_hdr_maxsz + \
 142                                XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 143                                /* client name */ \
 144                                1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 145                                1 /* sc_prog */ + \
 146                                1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 147                                1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
 148                                1) /* sc_cb_ident */
 149#define decode_setclientid_maxsz \
 150                                (op_decode_hdr_maxsz + \
 151                                2 /* clientid */ + \
 152                                XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 153                                1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 154                                1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN))
 155#define encode_setclientid_confirm_maxsz \
 156                                (op_encode_hdr_maxsz + \
 157                                3 + (NFS4_VERIFIER_SIZE >> 2))
 158#define decode_setclientid_confirm_maxsz \
 159                                (op_decode_hdr_maxsz)
 160#define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
 161#define decode_lookup_maxsz     (op_decode_hdr_maxsz)
 162#define encode_lookupp_maxsz    (op_encode_hdr_maxsz)
 163#define decode_lookupp_maxsz    (op_decode_hdr_maxsz)
 164#define encode_share_access_maxsz \
 165                                (2)
 166#define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
 167#define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
 168#define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
 169#define encode_open_maxsz       (op_encode_hdr_maxsz + \
 170                                2 + encode_share_access_maxsz + 2 + \
 171                                open_owner_id_maxsz + \
 172                                encode_opentype_maxsz + \
 173                                encode_claim_null_maxsz)
 174#define decode_space_limit_maxsz        (3)
 175#define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
 176#define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
 177                                decode_space_limit_maxsz + \
 178                                decode_ace_maxsz)
 179#define decode_change_info_maxsz        (5)
 180#define decode_open_maxsz       (op_decode_hdr_maxsz + \
 181                                decode_stateid_maxsz + \
 182                                decode_change_info_maxsz + 1 + \
 183                                nfs4_fattr_bitmap_maxsz + \
 184                                decode_delegation_maxsz)
 185#define encode_open_confirm_maxsz \
 186                                (op_encode_hdr_maxsz + \
 187                                 encode_stateid_maxsz + 1)
 188#define decode_open_confirm_maxsz \
 189                                (op_decode_hdr_maxsz + \
 190                                 decode_stateid_maxsz)
 191#define encode_open_downgrade_maxsz \
 192                                (op_encode_hdr_maxsz + \
 193                                 encode_stateid_maxsz + 1 + \
 194                                 encode_share_access_maxsz)
 195#define decode_open_downgrade_maxsz \
 196                                (op_decode_hdr_maxsz + \
 197                                 decode_stateid_maxsz)
 198#define encode_close_maxsz      (op_encode_hdr_maxsz + \
 199                                 1 + encode_stateid_maxsz)
 200#define decode_close_maxsz      (op_decode_hdr_maxsz + \
 201                                 decode_stateid_maxsz)
 202#define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
 203                                 encode_stateid_maxsz + \
 204                                 encode_attrs_maxsz)
 205#define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
 206                                 nfs4_fattr_bitmap_maxsz)
 207#define encode_read_maxsz       (op_encode_hdr_maxsz + \
 208                                 encode_stateid_maxsz + 3)
 209#define decode_read_maxsz       (op_decode_hdr_maxsz + 2)
 210#define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
 211                                 2 + encode_verifier_maxsz + 5 + \
 212                                nfs4_label_maxsz)
 213#define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
 214                                 decode_verifier_maxsz)
 215#define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 216#define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1)
 217#define encode_write_maxsz      (op_encode_hdr_maxsz + \
 218                                 encode_stateid_maxsz + 4)
 219#define decode_write_maxsz      (op_decode_hdr_maxsz + \
 220                                 2 + decode_verifier_maxsz)
 221#define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
 222#define decode_commit_maxsz     (op_decode_hdr_maxsz + \
 223                                 decode_verifier_maxsz)
 224#define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 225                                nfs4_name_maxsz)
 226#define decode_remove_maxsz     (op_decode_hdr_maxsz + \
 227                                 decode_change_info_maxsz)
 228#define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 229                                2 * nfs4_name_maxsz)
 230#define decode_rename_maxsz     (op_decode_hdr_maxsz + \
 231                                 decode_change_info_maxsz + \
 232                                 decode_change_info_maxsz)
 233#define encode_link_maxsz       (op_encode_hdr_maxsz + \
 234                                nfs4_name_maxsz)
 235#define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
 236#define encode_lockowner_maxsz  (7)
 237#define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 238                                 7 + \
 239                                 1 + encode_stateid_maxsz + 1 + \
 240                                 encode_lockowner_maxsz)
 241#define decode_lock_denied_maxsz \
 242                                (8 + decode_lockowner_maxsz)
 243#define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 244                                 decode_lock_denied_maxsz)
 245#define encode_lockt_maxsz      (op_encode_hdr_maxsz + 5 + \
 246                                encode_lockowner_maxsz)
 247#define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 248                                 decode_lock_denied_maxsz)
 249#define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 250                                 encode_stateid_maxsz + \
 251                                 4)
 252#define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 253                                 decode_stateid_maxsz)
 254#define encode_release_lockowner_maxsz \
 255                                (op_encode_hdr_maxsz + \
 256                                 encode_lockowner_maxsz)
 257#define decode_release_lockowner_maxsz \
 258                                (op_decode_hdr_maxsz)
 259#define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 260#define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 261#define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 262                                1 + nfs4_name_maxsz + \
 263                                1 + \
 264                                nfs4_fattr_maxsz)
 265#define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 266#define encode_create_maxsz     (op_encode_hdr_maxsz + \
 267                                1 + 2 + nfs4_name_maxsz + \
 268                                encode_attrs_maxsz)
 269#define decode_create_maxsz     (op_decode_hdr_maxsz + \
 270                                decode_change_info_maxsz + \
 271                                nfs4_fattr_bitmap_maxsz)
 272#define encode_statfs_maxsz     (encode_getattr_maxsz)
 273#define decode_statfs_maxsz     (decode_getattr_maxsz)
 274#define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 275#define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 276#define encode_getacl_maxsz     (encode_getattr_maxsz)
 277#define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 278                                 nfs4_fattr_bitmap_maxsz + 1)
 279#define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 280                                 encode_stateid_maxsz + 3)
 281#define decode_setacl_maxsz     (decode_setattr_maxsz)
 282#define encode_fs_locations_maxsz \
 283                                (encode_getattr_maxsz)
 284#define decode_fs_locations_maxsz \
 285                                (0)
 286#define encode_secinfo_maxsz    (op_encode_hdr_maxsz + nfs4_name_maxsz)
 287#define decode_secinfo_maxsz    (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
 288
 289#if defined(CONFIG_NFS_V4_1)
 290#define NFS4_MAX_MACHINE_NAME_LEN (64)
 291#define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \
 292                         sizeof(utsname()->version) + sizeof(utsname()->machine) + 8)
 293
 294#define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
 295                                encode_verifier_maxsz + \
 296                                1 /* co_ownerid.len */ + \
 297                                /* eia_clientowner */ \
 298                                1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 299                                1 /* flags */ + \
 300                                1 /* spa_how */ + \
 301                                /* max is SP4_MACH_CRED (for now) */ + \
 302                                1 + NFS4_OP_MAP_NUM_WORDS + \
 303                                1 + NFS4_OP_MAP_NUM_WORDS + \
 304                                1 /* implementation id array of size 1 */ + \
 305                                1 /* nii_domain */ + \
 306                                XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 307                                1 /* nii_name */ + \
 308                                XDR_QUADLEN(IMPL_NAME_LIMIT) + \
 309                                3 /* nii_date */)
 310#define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
 311                                2 /* eir_clientid */ + \
 312                                1 /* eir_sequenceid */ + \
 313                                1 /* eir_flags */ + \
 314                                1 /* spr_how */ + \
 315                                  /* max is SP4_MACH_CRED (for now) */ + \
 316                                1 + NFS4_OP_MAP_NUM_WORDS + \
 317                                1 + NFS4_OP_MAP_NUM_WORDS + \
 318                                2 /* eir_server_owner.so_minor_id */ + \
 319                                /* eir_server_owner.so_major_id<> */ \
 320                                XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 321                                /* eir_server_scope<> */ \
 322                                XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 323                                1 /* eir_server_impl_id array length */ + \
 324                                1 /* nii_domain */ + \
 325                                XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 326                                1 /* nii_name */ + \
 327                                XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 328                                3 /* nii_date */)
 329#define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
 330#define decode_channel_attrs_maxsz  (6 + \
 331                                     1 /* ca_rdma_ird.len */ + \
 332                                     1 /* ca_rdma_ird */)
 333#define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
 334                                     2 /* csa_clientid */ + \
 335                                     1 /* csa_sequence */ + \
 336                                     1 /* csa_flags */ + \
 337                                     encode_channel_attrs_maxsz + \
 338                                     encode_channel_attrs_maxsz + \
 339                                     1 /* csa_cb_program */ + \
 340                                     1 /* csa_sec_parms.len (1) */ + \
 341                                     1 /* cb_secflavor (AUTH_SYS) */ + \
 342                                     1 /* stamp */ + \
 343                                     1 /* machinename.len */ + \
 344                                     XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
 345                                     1 /* uid */ + \
 346                                     1 /* gid */ + \
 347                                     1 /* gids.len (0) */)
 348#define decode_create_session_maxsz  (op_decode_hdr_maxsz +     \
 349                                     XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 350                                     1 /* csr_sequence */ + \
 351                                     1 /* csr_flags */ + \
 352                                     decode_channel_attrs_maxsz + \
 353                                     decode_channel_attrs_maxsz)
 354#define encode_bind_conn_to_session_maxsz  (op_encode_hdr_maxsz + \
 355                                     /* bctsa_sessid */ \
 356                                     XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 357                                     1 /* bctsa_dir */ + \
 358                                     1 /* bctsa_use_conn_in_rdma_mode */)
 359#define decode_bind_conn_to_session_maxsz  (op_decode_hdr_maxsz +       \
 360                                     /* bctsr_sessid */ \
 361                                     XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 362                                     1 /* bctsr_dir */ + \
 363                                     1 /* bctsr_use_conn_in_rdma_mode */)
 364#define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
 365#define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
 366#define encode_destroy_clientid_maxsz   (op_encode_hdr_maxsz + 2)
 367#define decode_destroy_clientid_maxsz   (op_decode_hdr_maxsz)
 368#define encode_sequence_maxsz   (op_encode_hdr_maxsz + \
 369                                XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
 370#define decode_sequence_maxsz   (op_decode_hdr_maxsz + \
 371                                XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
 372#define encode_reclaim_complete_maxsz   (op_encode_hdr_maxsz + 4)
 373#define decode_reclaim_complete_maxsz   (op_decode_hdr_maxsz + 4)
 374#define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + \
 375                                XDR_QUADLEN(NFS4_DEVICEID4_SIZE) + \
 376                                1 /* layout type */ + \
 377                                1 /* maxcount */ + \
 378                                1 /* bitmap size */ + \
 379                                1 /* notification bitmap length */ + \
 380                                1 /* notification bitmap, word 0 */)
 381#define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
 382                                1 /* layout type */ + \
 383                                1 /* opaque devaddr4 length */ + \
 384                                  /* devaddr4 payload is read into page */ \
 385                                1 /* notification bitmap length */ + \
 386                                1 /* notification bitmap, word 0 */)
 387#define encode_layoutget_maxsz  (op_encode_hdr_maxsz + 10 + \
 388                                encode_stateid_maxsz)
 389#define decode_layoutget_maxsz  (op_decode_hdr_maxsz + 8 + \
 390                                decode_stateid_maxsz + \
 391                                XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
 392#define encode_layoutcommit_maxsz (op_encode_hdr_maxsz +          \
 393                                2 /* offset */ + \
 394                                2 /* length */ + \
 395                                1 /* reclaim */ + \
 396                                encode_stateid_maxsz + \
 397                                1 /* new offset (true) */ + \
 398                                2 /* last byte written */ + \
 399                                1 /* nt_timechanged (false) */ + \
 400                                1 /* layoutupdate4 layout type */ + \
 401                                1 /* layoutupdate4 opaqueue len */)
 402                                  /* the actual content of layoutupdate4 should
 403                                     be allocated by drivers and spliced in
 404                                     using xdr_write_pages */
 405#define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
 406#define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
 407                                encode_stateid_maxsz + \
 408                                1 + \
 409                                XDR_QUADLEN(NFS4_OPAQUE_LIMIT))
 410#define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
 411                                1 + decode_stateid_maxsz)
 412#define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
 413#define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
 414#define encode_test_stateid_maxsz       (op_encode_hdr_maxsz + 2 + \
 415                                         XDR_QUADLEN(NFS4_STATEID_SIZE))
 416#define decode_test_stateid_maxsz       (op_decode_hdr_maxsz + 2 + 1)
 417#define encode_free_stateid_maxsz       (op_encode_hdr_maxsz + 1 + \
 418                                         XDR_QUADLEN(NFS4_STATEID_SIZE))
 419#define decode_free_stateid_maxsz       (op_decode_hdr_maxsz)
 420#else /* CONFIG_NFS_V4_1 */
 421#define encode_sequence_maxsz   0
 422#define decode_sequence_maxsz   0
 423#define encode_layoutreturn_maxsz 0
 424#define decode_layoutreturn_maxsz 0
 425#endif /* CONFIG_NFS_V4_1 */
 426
 427#define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 428#define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 429#define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 430                                encode_sequence_maxsz + \
 431                                encode_putfh_maxsz + \
 432                                encode_read_maxsz)
 433#define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 434                                decode_sequence_maxsz + \
 435                                decode_putfh_maxsz + \
 436                                decode_read_maxsz)
 437#define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 438                                encode_sequence_maxsz + \
 439                                encode_putfh_maxsz + \
 440                                encode_readlink_maxsz)
 441#define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 442                                decode_sequence_maxsz + \
 443                                decode_putfh_maxsz + \
 444                                decode_readlink_maxsz)
 445#define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 446                                encode_sequence_maxsz + \
 447                                encode_putfh_maxsz + \
 448                                encode_readdir_maxsz)
 449#define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 450                                decode_sequence_maxsz + \
 451                                decode_putfh_maxsz + \
 452                                decode_readdir_maxsz)
 453#define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 454                                encode_sequence_maxsz + \
 455                                encode_putfh_maxsz + \
 456                                encode_write_maxsz + \
 457                                encode_getattr_maxsz)
 458#define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 459                                decode_sequence_maxsz + \
 460                                decode_putfh_maxsz + \
 461                                decode_write_maxsz + \
 462                                decode_getattr_maxsz)
 463#define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 464                                encode_sequence_maxsz + \
 465                                encode_putfh_maxsz + \
 466                                encode_commit_maxsz)
 467#define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 468                                decode_sequence_maxsz + \
 469                                decode_putfh_maxsz + \
 470                                decode_commit_maxsz)
 471#define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 472                                encode_sequence_maxsz + \
 473                                encode_putfh_maxsz + \
 474                                encode_open_maxsz + \
 475                                encode_access_maxsz + \
 476                                encode_getfh_maxsz + \
 477                                encode_getattr_maxsz)
 478#define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 479                                decode_sequence_maxsz + \
 480                                decode_putfh_maxsz + \
 481                                decode_open_maxsz + \
 482                                decode_access_maxsz + \
 483                                decode_getfh_maxsz + \
 484                                decode_getattr_maxsz)
 485#define NFS4_enc_open_confirm_sz \
 486                                (compound_encode_hdr_maxsz + \
 487                                 encode_putfh_maxsz + \
 488                                 encode_open_confirm_maxsz)
 489#define NFS4_dec_open_confirm_sz \
 490                                (compound_decode_hdr_maxsz + \
 491                                 decode_putfh_maxsz + \
 492                                 decode_open_confirm_maxsz)
 493#define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 494                                        encode_sequence_maxsz + \
 495                                        encode_putfh_maxsz + \
 496                                        encode_open_maxsz + \
 497                                        encode_access_maxsz + \
 498                                        encode_getattr_maxsz)
 499#define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 500                                        decode_sequence_maxsz + \
 501                                        decode_putfh_maxsz + \
 502                                        decode_open_maxsz + \
 503                                        decode_access_maxsz + \
 504                                        decode_getattr_maxsz)
 505#define NFS4_enc_open_downgrade_sz \
 506                                (compound_encode_hdr_maxsz + \
 507                                 encode_sequence_maxsz + \
 508                                 encode_putfh_maxsz + \
 509                                 encode_layoutreturn_maxsz + \
 510                                 encode_open_downgrade_maxsz)
 511#define NFS4_dec_open_downgrade_sz \
 512                                (compound_decode_hdr_maxsz + \
 513                                 decode_sequence_maxsz + \
 514                                 decode_putfh_maxsz + \
 515                                 decode_layoutreturn_maxsz + \
 516                                 decode_open_downgrade_maxsz)
 517#define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 518                                 encode_sequence_maxsz + \
 519                                 encode_putfh_maxsz + \
 520                                 encode_layoutreturn_maxsz + \
 521                                 encode_close_maxsz + \
 522                                 encode_getattr_maxsz)
 523#define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 524                                 decode_sequence_maxsz + \
 525                                 decode_putfh_maxsz + \
 526                                 decode_layoutreturn_maxsz + \
 527                                 decode_close_maxsz + \
 528                                 decode_getattr_maxsz)
 529#define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 530                                 encode_sequence_maxsz + \
 531                                 encode_putfh_maxsz + \
 532                                 encode_setattr_maxsz + \
 533                                 encode_getattr_maxsz)
 534#define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 535                                 decode_sequence_maxsz + \
 536                                 decode_putfh_maxsz + \
 537                                 decode_setattr_maxsz + \
 538                                 decode_getattr_maxsz)
 539#define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 540                                encode_sequence_maxsz + \
 541                                encode_putfh_maxsz + \
 542                                encode_fsinfo_maxsz)
 543#define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 544                                decode_sequence_maxsz + \
 545                                decode_putfh_maxsz + \
 546                                decode_fsinfo_maxsz)
 547#define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 548                                encode_renew_maxsz)
 549#define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 550                                decode_renew_maxsz)
 551#define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 552                                encode_setclientid_maxsz)
 553#define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 554                                decode_setclientid_maxsz)
 555#define NFS4_enc_setclientid_confirm_sz \
 556                                (compound_encode_hdr_maxsz + \
 557                                encode_setclientid_confirm_maxsz)
 558#define NFS4_dec_setclientid_confirm_sz \
 559                                (compound_decode_hdr_maxsz + \
 560                                decode_setclientid_confirm_maxsz)
 561#define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 562                                encode_sequence_maxsz + \
 563                                encode_putfh_maxsz + \
 564                                encode_lock_maxsz)
 565#define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 566                                decode_sequence_maxsz + \
 567                                decode_putfh_maxsz + \
 568                                decode_lock_maxsz)
 569#define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 570                                encode_sequence_maxsz + \
 571                                encode_putfh_maxsz + \
 572                                encode_lockt_maxsz)
 573#define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 574                                 decode_sequence_maxsz + \
 575                                 decode_putfh_maxsz + \
 576                                 decode_lockt_maxsz)
 577#define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 578                                encode_sequence_maxsz + \
 579                                encode_putfh_maxsz + \
 580                                encode_locku_maxsz)
 581#define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 582                                decode_sequence_maxsz + \
 583                                decode_putfh_maxsz + \
 584                                decode_locku_maxsz)
 585#define NFS4_enc_release_lockowner_sz \
 586                                (compound_encode_hdr_maxsz + \
 587                                 encode_lockowner_maxsz)
 588#define NFS4_dec_release_lockowner_sz \
 589                                (compound_decode_hdr_maxsz + \
 590                                 decode_lockowner_maxsz)
 591#define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 592                                encode_sequence_maxsz + \
 593                                encode_putfh_maxsz + \
 594                                encode_access_maxsz + \
 595                                encode_getattr_maxsz)
 596#define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 597                                decode_sequence_maxsz + \
 598                                decode_putfh_maxsz + \
 599                                decode_access_maxsz + \
 600                                decode_getattr_maxsz)
 601#define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 602                                encode_sequence_maxsz + \
 603                                encode_putfh_maxsz + \
 604                                encode_getattr_maxsz + \
 605                                encode_renew_maxsz)
 606#define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 607                                decode_sequence_maxsz + \
 608                                decode_putfh_maxsz + \
 609                                decode_getattr_maxsz + \
 610                                decode_renew_maxsz)
 611#define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 612                                encode_sequence_maxsz + \
 613                                encode_putfh_maxsz + \
 614                                encode_lookup_maxsz + \
 615                                encode_getattr_maxsz + \
 616                                encode_getfh_maxsz)
 617#define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 618                                decode_sequence_maxsz + \
 619                                decode_putfh_maxsz + \
 620                                decode_lookup_maxsz + \
 621                                decode_getattr_maxsz + \
 622                                decode_getfh_maxsz)
 623#define NFS4_enc_lookupp_sz     (compound_encode_hdr_maxsz + \
 624                                encode_sequence_maxsz + \
 625                                encode_putfh_maxsz + \
 626                                encode_lookupp_maxsz + \
 627                                encode_getattr_maxsz + \
 628                                encode_getfh_maxsz)
 629#define NFS4_dec_lookupp_sz     (compound_decode_hdr_maxsz + \
 630                                decode_sequence_maxsz + \
 631                                decode_putfh_maxsz + \
 632                                decode_lookupp_maxsz + \
 633                                decode_getattr_maxsz + \
 634                                decode_getfh_maxsz)
 635#define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 636                                encode_sequence_maxsz + \
 637                                encode_putrootfh_maxsz + \
 638                                encode_getattr_maxsz + \
 639                                encode_getfh_maxsz)
 640#define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 641                                decode_sequence_maxsz + \
 642                                decode_putrootfh_maxsz + \
 643                                decode_getattr_maxsz + \
 644                                decode_getfh_maxsz)
 645#define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 646                                encode_sequence_maxsz + \
 647                                encode_putfh_maxsz + \
 648                                encode_remove_maxsz)
 649#define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 650                                decode_sequence_maxsz + \
 651                                decode_putfh_maxsz + \
 652                                decode_remove_maxsz)
 653#define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 654                                encode_sequence_maxsz + \
 655                                encode_putfh_maxsz + \
 656                                encode_savefh_maxsz + \
 657                                encode_putfh_maxsz + \
 658                                encode_rename_maxsz)
 659#define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 660                                decode_sequence_maxsz + \
 661                                decode_putfh_maxsz + \
 662                                decode_savefh_maxsz + \
 663                                decode_putfh_maxsz + \
 664                                decode_rename_maxsz)
 665#define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 666                                encode_sequence_maxsz + \
 667                                encode_putfh_maxsz + \
 668                                encode_savefh_maxsz + \
 669                                encode_putfh_maxsz + \
 670                                encode_link_maxsz + \
 671                                encode_restorefh_maxsz + \
 672                                encode_getattr_maxsz)
 673#define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 674                                decode_sequence_maxsz + \
 675                                decode_putfh_maxsz + \
 676                                decode_savefh_maxsz + \
 677                                decode_putfh_maxsz + \
 678                                decode_link_maxsz + \
 679                                decode_restorefh_maxsz + \
 680                                decode_getattr_maxsz)
 681#define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 682                                encode_sequence_maxsz + \
 683                                encode_putfh_maxsz + \
 684                                encode_symlink_maxsz + \
 685                                encode_getattr_maxsz + \
 686                                encode_getfh_maxsz)
 687#define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 688                                decode_sequence_maxsz + \
 689                                decode_putfh_maxsz + \
 690                                decode_symlink_maxsz + \
 691                                decode_getattr_maxsz + \
 692                                decode_getfh_maxsz)
 693#define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 694                                encode_sequence_maxsz + \
 695                                encode_putfh_maxsz + \
 696                                encode_create_maxsz + \
 697                                encode_getfh_maxsz + \
 698                                encode_getattr_maxsz)
 699#define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 700                                decode_sequence_maxsz + \
 701                                decode_putfh_maxsz + \
 702                                decode_create_maxsz + \
 703                                decode_getfh_maxsz + \
 704                                decode_getattr_maxsz)
 705#define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 706                                encode_sequence_maxsz + \
 707                                encode_putfh_maxsz + \
 708                                encode_getattr_maxsz)
 709#define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 710                                decode_sequence_maxsz + \
 711                                decode_putfh_maxsz + \
 712                                decode_getattr_maxsz)
 713#define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 714                                encode_sequence_maxsz + \
 715                                encode_putfh_maxsz + \
 716                                encode_statfs_maxsz)
 717#define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 718                                decode_sequence_maxsz + \
 719                                decode_putfh_maxsz + \
 720                                decode_statfs_maxsz)
 721#define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 722                                encode_sequence_maxsz + \
 723                                encode_putfh_maxsz + \
 724                                encode_getattr_maxsz)
 725#define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 726                                decode_sequence_maxsz + \
 727                                decode_putfh_maxsz + \
 728                                decode_getattr_maxsz)
 729#define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 730                                encode_sequence_maxsz + \
 731                                encode_putfh_maxsz + \
 732                                encode_layoutreturn_maxsz + \
 733                                encode_delegreturn_maxsz + \
 734                                encode_getattr_maxsz)
 735#define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 736                                decode_sequence_maxsz + \
 737                                decode_putfh_maxsz + \
 738                                decode_layoutreturn_maxsz + \
 739                                decode_delegreturn_maxsz + \
 740                                decode_getattr_maxsz)
 741#define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 742                                encode_sequence_maxsz + \
 743                                encode_putfh_maxsz + \
 744                                encode_getacl_maxsz)
 745#define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 746                                decode_sequence_maxsz + \
 747                                decode_putfh_maxsz + \
 748                                decode_getacl_maxsz)
 749#define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 750                                encode_sequence_maxsz + \
 751                                encode_putfh_maxsz + \
 752                                encode_setacl_maxsz)
 753#define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 754                                decode_sequence_maxsz + \
 755                                decode_putfh_maxsz + \
 756                                decode_setacl_maxsz)
 757#define NFS4_enc_fs_locations_sz \
 758                                (compound_encode_hdr_maxsz + \
 759                                 encode_sequence_maxsz + \
 760                                 encode_putfh_maxsz + \
 761                                 encode_lookup_maxsz + \
 762                                 encode_fs_locations_maxsz + \
 763                                 encode_renew_maxsz)
 764#define NFS4_dec_fs_locations_sz \
 765                                (compound_decode_hdr_maxsz + \
 766                                 decode_sequence_maxsz + \
 767                                 decode_putfh_maxsz + \
 768                                 decode_lookup_maxsz + \
 769                                 decode_fs_locations_maxsz + \
 770                                 decode_renew_maxsz)
 771#define NFS4_enc_secinfo_sz     (compound_encode_hdr_maxsz + \
 772                                encode_sequence_maxsz + \
 773                                encode_putfh_maxsz + \
 774                                encode_secinfo_maxsz)
 775#define NFS4_dec_secinfo_sz     (compound_decode_hdr_maxsz + \
 776                                decode_sequence_maxsz + \
 777                                decode_putfh_maxsz + \
 778                                decode_secinfo_maxsz)
 779#define NFS4_enc_fsid_present_sz \
 780                                (compound_encode_hdr_maxsz + \
 781                                 encode_sequence_maxsz + \
 782                                 encode_putfh_maxsz + \
 783                                 encode_getfh_maxsz + \
 784                                 encode_renew_maxsz)
 785#define NFS4_dec_fsid_present_sz \
 786                                (compound_decode_hdr_maxsz + \
 787                                 decode_sequence_maxsz + \
 788                                 decode_putfh_maxsz + \
 789                                 decode_getfh_maxsz + \
 790                                 decode_renew_maxsz)
 791#if defined(CONFIG_NFS_V4_1)
 792#define NFS4_enc_bind_conn_to_session_sz \
 793                                (compound_encode_hdr_maxsz + \
 794                                 encode_bind_conn_to_session_maxsz)
 795#define NFS4_dec_bind_conn_to_session_sz \
 796                                (compound_decode_hdr_maxsz + \
 797                                 decode_bind_conn_to_session_maxsz)
 798#define NFS4_enc_exchange_id_sz \
 799                                (compound_encode_hdr_maxsz + \
 800                                 encode_exchange_id_maxsz)
 801#define NFS4_dec_exchange_id_sz \
 802                                (compound_decode_hdr_maxsz + \
 803                                 decode_exchange_id_maxsz)
 804#define NFS4_enc_create_session_sz \
 805                                (compound_encode_hdr_maxsz + \
 806                                 encode_create_session_maxsz)
 807#define NFS4_dec_create_session_sz \
 808                                (compound_decode_hdr_maxsz + \
 809                                 decode_create_session_maxsz)
 810#define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
 811                                         encode_destroy_session_maxsz)
 812#define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
 813                                         decode_destroy_session_maxsz)
 814#define NFS4_enc_destroy_clientid_sz    (compound_encode_hdr_maxsz + \
 815                                         encode_destroy_clientid_maxsz)
 816#define NFS4_dec_destroy_clientid_sz    (compound_decode_hdr_maxsz + \
 817                                         decode_destroy_clientid_maxsz)
 818#define NFS4_enc_sequence_sz \
 819                                (compound_decode_hdr_maxsz + \
 820                                 encode_sequence_maxsz)
 821#define NFS4_dec_sequence_sz \
 822                                (compound_decode_hdr_maxsz + \
 823                                 decode_sequence_maxsz)
 824#define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
 825                                         encode_sequence_maxsz + \
 826                                         encode_putrootfh_maxsz + \
 827                                         encode_fsinfo_maxsz)
 828#define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
 829                                         decode_sequence_maxsz + \
 830                                         decode_putrootfh_maxsz + \
 831                                         decode_fsinfo_maxsz)
 832#define NFS4_enc_reclaim_complete_sz    (compound_encode_hdr_maxsz + \
 833                                         encode_sequence_maxsz + \
 834                                         encode_reclaim_complete_maxsz)
 835#define NFS4_dec_reclaim_complete_sz    (compound_decode_hdr_maxsz + \
 836                                         decode_sequence_maxsz + \
 837                                         decode_reclaim_complete_maxsz)
 838#define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
 839                                encode_sequence_maxsz +\
 840                                encode_getdeviceinfo_maxsz)
 841#define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
 842                                decode_sequence_maxsz + \
 843                                decode_getdeviceinfo_maxsz)
 844#define NFS4_enc_layoutget_sz   (compound_encode_hdr_maxsz + \
 845                                encode_sequence_maxsz + \
 846                                encode_putfh_maxsz +        \
 847                                encode_layoutget_maxsz)
 848#define NFS4_dec_layoutget_sz   (compound_decode_hdr_maxsz + \
 849                                decode_sequence_maxsz + \
 850                                decode_putfh_maxsz +        \
 851                                decode_layoutget_maxsz)
 852#define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
 853                                encode_sequence_maxsz +\
 854                                encode_putfh_maxsz + \
 855                                encode_layoutcommit_maxsz + \
 856                                encode_getattr_maxsz)
 857#define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
 858                                decode_sequence_maxsz + \
 859                                decode_putfh_maxsz + \
 860                                decode_layoutcommit_maxsz + \
 861                                decode_getattr_maxsz)
 862#define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
 863                                encode_sequence_maxsz + \
 864                                encode_putfh_maxsz + \
 865                                encode_layoutreturn_maxsz)
 866#define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
 867                                decode_sequence_maxsz + \
 868                                decode_putfh_maxsz + \
 869                                decode_layoutreturn_maxsz)
 870#define NFS4_enc_secinfo_no_name_sz     (compound_encode_hdr_maxsz + \
 871                                        encode_sequence_maxsz + \
 872                                        encode_putrootfh_maxsz +\
 873                                        encode_secinfo_no_name_maxsz)
 874#define NFS4_dec_secinfo_no_name_sz     (compound_decode_hdr_maxsz + \
 875                                        decode_sequence_maxsz + \
 876                                        decode_putrootfh_maxsz + \
 877                                        decode_secinfo_no_name_maxsz)
 878#define NFS4_enc_test_stateid_sz        (compound_encode_hdr_maxsz + \
 879                                         encode_sequence_maxsz + \
 880                                         encode_test_stateid_maxsz)
 881#define NFS4_dec_test_stateid_sz        (compound_decode_hdr_maxsz + \
 882                                         decode_sequence_maxsz + \
 883                                         decode_test_stateid_maxsz)
 884#define NFS4_enc_free_stateid_sz        (compound_encode_hdr_maxsz + \
 885                                         encode_sequence_maxsz + \
 886                                         encode_free_stateid_maxsz)
 887#define NFS4_dec_free_stateid_sz        (compound_decode_hdr_maxsz + \
 888                                         decode_sequence_maxsz + \
 889                                         decode_free_stateid_maxsz)
 890
 891const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 892                                      compound_encode_hdr_maxsz +
 893                                      encode_sequence_maxsz +
 894                                      encode_putfh_maxsz +
 895                                      encode_getattr_maxsz) *
 896                                     XDR_UNIT);
 897
 898const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 899                                     compound_decode_hdr_maxsz +
 900                                     decode_sequence_maxsz +
 901                                     decode_putfh_maxsz) *
 902                                    XDR_UNIT);
 903
 904const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH +
 905                                           compound_decode_hdr_maxsz +
 906                                           decode_sequence_maxsz) *
 907                                          XDR_UNIT);
 908EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead);
 909#endif /* CONFIG_NFS_V4_1 */
 910
 911static const umode_t nfs_type2fmt[] = {
 912        [NF4BAD] = 0,
 913        [NF4REG] = S_IFREG,
 914        [NF4DIR] = S_IFDIR,
 915        [NF4BLK] = S_IFBLK,
 916        [NF4CHR] = S_IFCHR,
 917        [NF4LNK] = S_IFLNK,
 918        [NF4SOCK] = S_IFSOCK,
 919        [NF4FIFO] = S_IFIFO,
 920        [NF4ATTRDIR] = 0,
 921        [NF4NAMEDATTR] = 0,
 922};
 923
 924struct compound_hdr {
 925        int32_t         status;
 926        uint32_t        nops;
 927        __be32 *        nops_p;
 928        uint32_t        taglen;
 929        char *          tag;
 930        uint32_t        replen;         /* expected reply words */
 931        u32             minorversion;
 932};
 933
 934static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
 935{
 936        __be32 *p = xdr_reserve_space(xdr, nbytes);
 937        BUG_ON(!p);
 938        return p;
 939}
 940
 941static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
 942{
 943        WARN_ON_ONCE(xdr_stream_encode_opaque_fixed(xdr, buf, len) < 0);
 944}
 945
 946static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 947{
 948        WARN_ON_ONCE(xdr_stream_encode_opaque(xdr, str, len) < 0);
 949}
 950
 951static void encode_uint32(struct xdr_stream *xdr, u32 n)
 952{
 953        WARN_ON_ONCE(xdr_stream_encode_u32(xdr, n) < 0);
 954}
 955
 956static void encode_uint64(struct xdr_stream *xdr, u64 n)
 957{
 958        WARN_ON_ONCE(xdr_stream_encode_u64(xdr, n) < 0);
 959}
 960
 961static void encode_nfs4_seqid(struct xdr_stream *xdr,
 962                const struct nfs_seqid *seqid)
 963{
 964        if (seqid != NULL)
 965                encode_uint32(xdr, seqid->sequence->counter);
 966        else
 967                encode_uint32(xdr, 0);
 968}
 969
 970static void encode_compound_hdr(struct xdr_stream *xdr,
 971                                struct rpc_rqst *req,
 972                                struct compound_hdr *hdr)
 973{
 974        __be32 *p;
 975        struct rpc_auth *auth = req->rq_cred->cr_auth;
 976
 977        /* initialize running count of expected bytes in reply.
 978         * NOTE: the replied tag SHOULD be the same is the one sent,
 979         * but this is not required as a MUST for the server to do so. */
 980        hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
 981
 982        WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
 983        encode_string(xdr, hdr->taglen, hdr->tag);
 984        p = reserve_space(xdr, 8);
 985        *p++ = cpu_to_be32(hdr->minorversion);
 986        hdr->nops_p = p;
 987        *p = cpu_to_be32(hdr->nops);
 988}
 989
 990static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
 991                uint32_t replen,
 992                struct compound_hdr *hdr)
 993{
 994        encode_uint32(xdr, op);
 995        hdr->nops++;
 996        hdr->replen += replen;
 997}
 998
 999static void encode_nops(struct compound_hdr *hdr)
1000{

1001        WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
1002        *hdr->nops_p = htonl(hdr->nops);
1003}
1004
1005static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1006{
1007        encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
1008}
1009
1010static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
1011{
1012        encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
1013}
1014
1015static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
1016                                const struct nfs4_label *label,
1017                                const umode_t *umask,
1018                                const struct nfs_server *server,
1019                                const uint32_t attrmask[])
1020{
1021        char owner_name[IDMAP_NAMESZ];
1022        char owner_group[IDMAP_NAMESZ];
1023        int owner_namelen = 0;
1024        int owner_grouplen = 0;
1025        __be32 *p;
1026        unsigned i;
1027        uint32_t len = 0;
1028        uint32_t bmval_len;
1029        uint32_t bmval[3] = { 0 };
1030
1031        /*
1032         * We reserve enough space to write the entire attribute buffer at once.
1033         */
1034        if ((iap->ia_valid & ATTR_SIZE) && (attrmask[0] & FATTR4_WORD0_SIZE)) {
1035                bmval[0] |= FATTR4_WORD0_SIZE;
1036                len += 8;
1037        }
1038        if (iap->ia_valid & ATTR_MODE) {
1039                if (umask && (attrmask[2] & FATTR4_WORD2_MODE_UMASK)) {
1040                        bmval[2] |= FATTR4_WORD2_MODE_UMASK;
1041                        len += 8;
1042                } else if (attrmask[1] & FATTR4_WORD1_MODE) {
1043                        bmval[1] |= FATTR4_WORD1_MODE;
1044                        len += 4;
1045                }
1046        }
1047        if ((iap->ia_valid & ATTR_UID) && (attrmask[1] & FATTR4_WORD1_OWNER)) {
1048                owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1049                if (owner_namelen < 0) {
1050                        dprintk("nfs: couldn't resolve uid %d to string\n",
1051                                        from_kuid(&init_user_ns, iap->ia_uid));
1052                        /* XXX */
1053                        strcpy(owner_name, "nobody");
1054                        owner_namelen = sizeof("nobody") - 1;
1055                        /* goto out; */
1056                }
1057                bmval[1] |= FATTR4_WORD1_OWNER;
1058                len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1059        }
1060        if ((iap->ia_valid & ATTR_GID) &&
1061           (attrmask[1] & FATTR4_WORD1_OWNER_GROUP)) {
1062                owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1063                if (owner_grouplen < 0) {
1064                        dprintk("nfs: couldn't resolve gid %d to string\n",
1065                                        from_kgid(&init_user_ns, iap->ia_gid));
1066                        strcpy(owner_group, "nobody");
1067                        owner_grouplen = sizeof("nobody") - 1;
1068                        /* goto out; */
1069                }
1070                bmval[1] |= FATTR4_WORD1_OWNER_GROUP;
1071                len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1072        }
1073        if (attrmask[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1074                if (iap->ia_valid & ATTR_ATIME_SET) {
1075                        bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1076                        len += 16;
1077                } else if (iap->ia_valid & ATTR_ATIME) {
1078                        bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1079                        len += 4;
1080                }
1081        }
1082        if (attrmask[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1083                if (iap->ia_valid & ATTR_MTIME_SET) {
1084                        bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1085                        len += 16;
1086                } else if (iap->ia_valid & ATTR_MTIME) {
1087                        bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1088                        len += 4;
1089                }
1090        }
1091
1092        if (label && (attrmask[2] & FATTR4_WORD2_SECURITY_LABEL)) {
1093                len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1094                bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
1095        }
1096
1097        if (bmval[2] != 0)
1098                bmval_len = 3;
1099        else if (bmval[1] != 0)
1100                bmval_len = 2;
1101        else
1102                bmval_len = 1;
1103
1104        p = reserve_space(xdr, 4 + (bmval_len << 2) + 4 + len);
1105
1106        *p++ = cpu_to_be32(bmval_len);
1107        for (i = 0; i < bmval_len; i++)
1108                *p++ = cpu_to_be32(bmval[i]);
1109        *p++ = cpu_to_be32(len);
1110
1111        if (bmval[0] & FATTR4_WORD0_SIZE)
1112                p = xdr_encode_hyper(p, iap->ia_size);
1113        if (bmval[1] & FATTR4_WORD1_MODE)
1114                *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1115        if (bmval[1] & FATTR4_WORD1_OWNER)
1116                p = xdr_encode_opaque(p, owner_name, owner_namelen);
1117        if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
1118                p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1119        if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1120                if (iap->ia_valid & ATTR_ATIME_SET) {
1121                        *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1122                        p = xdr_encode_hyper(p, (s64)iap->ia_atime.tv_sec);
1123                        *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
1124                } else
1125                        *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1126        }
1127        if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1128                if (iap->ia_valid & ATTR_MTIME_SET) {
1129                        *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1130                        p = xdr_encode_hyper(p, (s64)iap->ia_mtime.tv_sec);
1131                        *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1132                } else
1133                        *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1134        }
1135        if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
1136                *p++ = cpu_to_be32(label->lfs);
1137                *p++ = cpu_to_be32(label->pi);
1138                *p++ = cpu_to_be32(label->len);
1139                p = xdr_encode_opaque_fixed(p, label->label, label->len);
1140        }
1141        if (bmval[2] & FATTR4_WORD2_MODE_UMASK) {
1142                *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1143                *p++ = cpu_to_be32(*umask);
1144        }
1145
1146/* out: */
1147}
1148
1149static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1150{
1151        encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1152        encode_uint32(xdr, access);
1153}
1154
1155static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1156{
1157        encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1158        encode_nfs4_seqid(xdr, arg->seqid);
1159        encode_nfs4_stateid(xdr, &arg->stateid);
1160}
1161
1162static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1163{
1164        __be32 *p;
1165
1166        encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1167        p = reserve_space(xdr, 12);
1168        p = xdr_encode_hyper(p, args->offset);
1169        *p = cpu_to_be32(args->count);
1170}
1171
1172static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1173{
1174        __be32 *p;
1175
1176        encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1177        encode_uint32(xdr, create->ftype);
1178
1179        switch (create->ftype) {
1180        case NF4LNK:
1181                p = reserve_space(xdr, 4);
1182                *p = cpu_to_be32(create->u.symlink.len);
1183                xdr_write_pages(xdr, create->u.symlink.pages, 0,
1184                                create->u.symlink.len);
1185                xdr->buf->flags |= XDRBUF_WRITE;
1186                break;
1187
1188        case NF4BLK: case NF4CHR:
1189                p = reserve_space(xdr, 8);
1190                *p++ = cpu_to_be32(create->u.device.specdata1);
1191                *p = cpu_to_be32(create->u.device.specdata2);
1192                break;
1193
1194        default:
1195                break;
1196        }
1197
1198        encode_string(xdr, create->name->len, create->name->name);
1199        encode_attrs(xdr, create->attrs, create->label, &create->umask,
1200                        create->server, create->server->attr_bitmask);
1201}
1202
1203static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1204{
1205        __be32 *p;
1206
1207        encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1208        p = reserve_space(xdr, 8);
1209        *p++ = cpu_to_be32(1);
1210        *p = cpu_to_be32(bitmap);
1211}
1212
1213static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1214{
1215        __be32 *p;
1216
1217        encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1218        p = reserve_space(xdr, 12);
1219        *p++ = cpu_to_be32(2);
1220        *p++ = cpu_to_be32(bm0);
1221        *p = cpu_to_be32(bm1);
1222}
1223
1224static void
1225encode_getattr_three(struct xdr_stream *xdr,
1226                     uint32_t bm0, uint32_t bm1, uint32_t bm2,
1227                     struct compound_hdr *hdr)
1228{
1229        __be32 *p;
1230
1231        encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1232        if (bm2) {
1233                p = reserve_space(xdr, 16);
1234                *p++ = cpu_to_be32(3);
1235                *p++ = cpu_to_be32(bm0);
1236                *p++ = cpu_to_be32(bm1);
1237                *p = cpu_to_be32(bm2);
1238        } else if (bm1) {
1239                p = reserve_space(xdr, 12);
1240                *p++ = cpu_to_be32(2);
1241                *p++ = cpu_to_be32(bm0);
1242                *p = cpu_to_be32(bm1);
1243        } else {
1244                p = reserve_space(xdr, 8);
1245                *p++ = cpu_to_be32(1);
1246                *p = cpu_to_be32(bm0);
1247        }
1248}
1249
1250static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1251{
1252        encode_getattr_three(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1253                           bitmask[1] & nfs4_fattr_bitmap[1],
1254                           bitmask[2] & nfs4_fattr_bitmap[2],
1255                           hdr);
1256}
1257
1258static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1259                                 const u32 *open_bitmap,
1260                                 struct compound_hdr *hdr)
1261{
1262        encode_getattr_three(xdr,
1263                             bitmask[0] & open_bitmap[0],
1264                             bitmask[1] & open_bitmap[1],
1265                             bitmask[2] & open_bitmap[2],
1266                             hdr);
1267}
1268
1269static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1270{
1271        encode_getattr_three(xdr,
1272                             bitmask[0] & nfs4_fsinfo_bitmap[0],
1273                             bitmask[1] & nfs4_fsinfo_bitmap[1],
1274                             bitmask[2] & nfs4_fsinfo_bitmap[2],
1275                             hdr);
1276}
1277
1278static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1279{
1280        encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1281                           bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1282}
1283
1284static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1285{
1286        encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1287}
1288
1289static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1290{
1291        encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1292        encode_string(xdr, name->len, name->name);
1293}
1294
1295static inline int nfs4_lock_type(struct file_lock *fl, int block)
1296{
1297        if (fl->fl_type == F_RDLCK)
1298                return block ? NFS4_READW_LT : NFS4_READ_LT;
1299        return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1300}
1301
1302static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1303{
1304        if (fl->fl_end == OFFSET_MAX)
1305                return ~(uint64_t)0;
1306        return fl->fl_end - fl->fl_start + 1;
1307}
1308
1309static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1310{
1311        __be32 *p;
1312
1313        p = reserve_space(xdr, 32);
1314        p = xdr_encode_hyper(p, lowner->clientid);
1315        *p++ = cpu_to_be32(20);
1316        p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1317        *p++ = cpu_to_be32(lowner->s_dev);
1318        xdr_encode_hyper(p, lowner->id);
1319}
1320
1321/*
1322 * opcode,type,reclaim,offset,length,new_lock_owner = 32
1323 * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1324 */
1325static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1326{
1327        __be32 *p;
1328
1329        encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1330        p = reserve_space(xdr, 28);
1331        *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1332        *p++ = cpu_to_be32(args->reclaim);
1333        p = xdr_encode_hyper(p, args->fl->fl_start);
1334        p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1335        *p = cpu_to_be32(args->new_lock_owner);
1336        if (args->new_lock_owner){
1337                encode_nfs4_seqid(xdr, args->open_seqid);
1338                encode_nfs4_stateid(xdr, &args->open_stateid);
1339                encode_nfs4_seqid(xdr, args->lock_seqid);
1340                encode_lockowner(xdr, &args->lock_owner);
1341        }
1342        else {
1343                encode_nfs4_stateid(xdr, &args->lock_stateid);
1344                encode_nfs4_seqid(xdr, args->lock_seqid);
1345        }
1346}
1347
1348static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1349{
1350        __be32 *p;
1351
1352        encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1353        p = reserve_space(xdr, 20);
1354        *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1355        p = xdr_encode_hyper(p, args->fl->fl_start);
1356        p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1357        encode_lockowner(xdr, &args->lock_owner);
1358}
1359
1360static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1361{
1362        __be32 *p;
1363
1364        encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1365        encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1366        encode_nfs4_seqid(xdr, args->seqid);
1367        encode_nfs4_stateid(xdr, &args->stateid);
1368        p = reserve_space(xdr, 16);
1369        p = xdr_encode_hyper(p, args->fl->fl_start);
1370        xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1371}
1372
1373static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1374{
1375        encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1376        encode_lockowner(xdr, lowner);
1377}
1378
1379static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1380{
1381        encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1382        encode_string(xdr, name->len, name->name);
1383}
1384
1385static void encode_lookupp(struct xdr_stream *xdr, struct compound_hdr *hdr)
1386{
1387        encode_op_hdr(xdr, OP_LOOKUPP, decode_lookupp_maxsz, hdr);
1388}
1389
1390static void encode_share_access(struct xdr_stream *xdr, u32 share_access)
1391{
1392        __be32 *p;
1393
1394        p = reserve_space(xdr, 8);
1395        *p++ = cpu_to_be32(share_access);
1396        *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1397}
1398
1399static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1400{
1401        __be32 *p;
1402 /*
1403 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1404 * owner 4 = 32
1405 */
1406        encode_nfs4_seqid(xdr, arg->seqid);
1407        encode_share_access(xdr, arg->share_access);
1408        p = reserve_space(xdr, 36);
1409        p = xdr_encode_hyper(p, arg->clientid);
1410        *p++ = cpu_to_be32(24);
1411        p = xdr_encode_opaque_fixed(p, "open id:", 8);
1412        *p++ = cpu_to_be32(arg->server->s_dev);
1413        *p++ = cpu_to_be32(arg->id.uniquifier);
1414        xdr_encode_hyper(p, arg->id.create_time);
1415}
1416
1417static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1418{
1419        __be32 *p;
1420
1421        p = reserve_space(xdr, 4);
1422        switch(arg->createmode) {
1423        case NFS4_CREATE_UNCHECKED:
1424                *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1425                encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1426                                arg->server, arg->server->attr_bitmask);
1427                break;
1428        case NFS4_CREATE_GUARDED:
1429                *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1430                encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1431                                arg->server, arg->server->attr_bitmask);
1432                break;
1433        case NFS4_CREATE_EXCLUSIVE:
1434                *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1435                encode_nfs4_verifier(xdr, &arg->u.verifier);
1436                break;
1437        case NFS4_CREATE_EXCLUSIVE4_1:
1438                *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1439                encode_nfs4_verifier(xdr, &arg->u.verifier);
1440                encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1441                                arg->server, arg->server->exclcreat_bitmask);
1442        }
1443}
1444
1445static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1446{
1447        __be32 *p;
1448
1449        p = reserve_space(xdr, 4);
1450        switch (arg->open_flags & O_CREAT) {
1451        case 0:
1452                *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1453                break;
1454        default:
1455                *p = cpu_to_be32(NFS4_OPEN_CREATE);
1456                encode_createmode(xdr, arg);
1457        }
1458}
1459
1460static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1461{
1462        __be32 *p;
1463
1464        p = reserve_space(xdr, 4);
1465        switch (delegation_type) {
1466        case 0:
1467                *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1468                break;
1469        case FMODE_READ:
1470                *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1471                break;
1472        case FMODE_WRITE|FMODE_READ:
1473                *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1474                break;
1475        default:
1476                BUG();
1477        }
1478}
1479
1480static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1481{
1482        __be32 *p;
1483
1484        p = reserve_space(xdr, 4);
1485        *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1486        encode_string(xdr, name->len, name->name);
1487}
1488
1489static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1490{
1491        __be32 *p;
1492
1493        p = reserve_space(xdr, 4);
1494        *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1495        encode_delegation_type(xdr, type);
1496}
1497
1498static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1499{
1500        __be32 *p;
1501
1502        p = reserve_space(xdr, 4);
1503        *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1504        encode_nfs4_stateid(xdr, stateid);
1505        encode_string(xdr, name->len, name->name);
1506}
1507
1508static inline void encode_claim_fh(struct xdr_stream *xdr)
1509{
1510        __be32 *p;
1511
1512        p = reserve_space(xdr, 4);
1513        *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1514}
1515
1516static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1517{
1518        __be32 *p;
1519
1520        p = reserve_space(xdr, 4);
1521        *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1522        encode_nfs4_stateid(xdr, stateid);
1523}
1524
1525static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1526{
1527        encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1528        encode_openhdr(xdr, arg);
1529        encode_opentype(xdr, arg);
1530        switch (arg->claim) {
1531        case NFS4_OPEN_CLAIM_NULL:
1532                encode_claim_null(xdr, arg->name);
1533                break;
1534        case NFS4_OPEN_CLAIM_PREVIOUS:
1535                encode_claim_previous(xdr, arg->u.delegation_type);
1536                break;
1537        case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1538                encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1539                break;
1540        case NFS4_OPEN_CLAIM_FH:
1541                encode_claim_fh(xdr);
1542                break;
1543        case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1544                encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1545                break;
1546        default:
1547                BUG();
1548        }
1549}
1550
1551static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1552{
1553        encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1554        encode_nfs4_stateid(xdr, arg->stateid);
1555        encode_nfs4_seqid(xdr, arg->seqid);
1556}
1557
1558static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1559{
1560        encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1561        encode_nfs4_stateid(xdr, &arg->stateid);
1562        encode_nfs4_seqid(xdr, arg->seqid);
1563        encode_share_access(xdr, arg->share_access);
1564}
1565
1566static void
1567encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1568{
1569        encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1570        encode_string(xdr, fh->size, fh->data);
1571}
1572
1573static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1574{
1575        encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1576}
1577
1578static void encode_read(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1579                        struct compound_hdr *hdr)
1580{
1581        __be32 *p;
1582
1583        encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1584        encode_nfs4_stateid(xdr, &args->stateid);
1585
1586        p = reserve_space(xdr, 12);
1587        p = xdr_encode_hyper(p, args->offset);
1588        *p = cpu_to_be32(args->count);
1589}
1590
1591static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1592{
1593        uint32_t attrs[3] = {
1594                FATTR4_WORD0_RDATTR_ERROR,
1595                FATTR4_WORD1_MOUNTED_ON_FILEID,
1596        };
1597        uint32_t dircount = readdir->count >> 1;
1598        __be32 *p, verf[2];
1599        uint32_t attrlen = 0;
1600        unsigned int i;
1601
1602        if (readdir->plus) {
1603                attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1604                        FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1605                attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1606                        FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1607                        FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1608                        FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1609                attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1610                dircount >>= 1;
1611        }
1612        /* Use mounted_on_fileid only if the server supports it */
1613        if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1614                attrs[0] |= FATTR4_WORD0_FILEID;
1615        for (i = 0; i < ARRAY_SIZE(attrs); i++) {
1616                attrs[i] &= readdir->bitmask[i];
1617                if (attrs[i] != 0)
1618                        attrlen = i+1;
1619        }
1620
1621        encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1622        encode_uint64(xdr, readdir->cookie);
1623        encode_nfs4_verifier(xdr, &readdir->verifier);
1624        p = reserve_space(xdr, 12 + (attrlen << 2));
1625        *p++ = cpu_to_be32(dircount);
1626        *p++ = cpu_to_be32(readdir->count);
1627        *p++ = cpu_to_be32(attrlen);
1628        for (i = 0; i < attrlen; i++)
1629                *p++ = cpu_to_be32(attrs[i]);
1630        memcpy(verf, readdir->verifier.data, sizeof(verf));
1631
1632        dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1633                        __func__,
1634                        (unsigned long long)readdir->cookie,
1635                        verf[0], verf[1],
1636                        attrs[0] & readdir->bitmask[0],
1637                        attrs[1] & readdir->bitmask[1],
1638                        attrs[2] & readdir->bitmask[2]);
1639}
1640
1641static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1642{
1643        encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1644}
1645
1646static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1647{
1648        encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1649        encode_string(xdr, name->len, name->name);
1650}
1651
1652static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1653{
1654        encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1655        encode_string(xdr, oldname->len, oldname->name);
1656        encode_string(xdr, newname->len, newname->name);
1657}
1658
1659static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1660                         struct compound_hdr *hdr)
1661{
1662        encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1663        encode_uint64(xdr, clid);
1664}
1665
1666static void
1667encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1668{
1669        encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1670}
1671
1672static void
1673encode_setacl(struct xdr_stream *xdr, const struct nfs_setaclargs *arg,
1674                struct compound_hdr *hdr)
1675{
1676        __be32 *p;
1677
1678        encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1679        encode_nfs4_stateid(xdr, &zero_stateid);
1680        p = reserve_space(xdr, 2*4);
1681        *p++ = cpu_to_be32(1);
1682        *p = cpu_to_be32(FATTR4_WORD0_ACL);
1683        p = reserve_space(xdr, 4);
1684        *p = cpu_to_be32(arg->acl_len);
1685        xdr_write_pages(xdr, arg->acl_pages, 0, arg->acl_len);
1686}
1687
1688static void
1689encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1690{
1691        encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1692}
1693
1694static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1695{
1696        encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1697        encode_nfs4_stateid(xdr, &arg->stateid);
1698        encode_attrs(xdr, arg->iap, arg->label, NULL, server,
1699                        server->attr_bitmask);
1700}
1701
1702static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1703{
1704        __be32 *p;
1705
1706        encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1707        encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1708
1709        encode_string(xdr, strlen(setclientid->sc_clnt->cl_owner_id),
1710                        setclientid->sc_clnt->cl_owner_id);
1711        p = reserve_space(xdr, 4);
1712        *p = cpu_to_be32(setclientid->sc_prog);
1713        encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1714        encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1715        p = reserve_space(xdr, 4);
1716        *p = cpu_to_be32(setclientid->sc_clnt->cl_cb_ident);
1717}
1718
1719static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1720{
1721        encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1722                        decode_setclientid_confirm_maxsz, hdr);
1723        encode_uint64(xdr, arg->clientid);
1724        encode_nfs4_verifier(xdr, &arg->confirm);
1725}
1726
1727static void encode_write(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1728                         struct compound_hdr *hdr)
1729{
1730        __be32 *p;
1731
1732        encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1733        encode_nfs4_stateid(xdr, &args->stateid);
1734
1735        p = reserve_space(xdr, 16);
1736        p = xdr_encode_hyper(p, args->offset);
1737        *p++ = cpu_to_be32(args->stable);
1738        *p = cpu_to_be32(args->count);
1739
1740        xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1741}
1742
1743static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1744{
1745        encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1746        encode_nfs4_stateid(xdr, stateid);
1747}
1748
1749static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1750{
1751        encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1752        encode_string(xdr, name->len, name->name);
1753}
1754
1755#if defined(CONFIG_NFS_V4_1)
1756/* NFSv4.1 operations */
1757static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1758                                   const struct nfs41_bind_conn_to_session_args *args,
1759                                   struct compound_hdr *hdr)
1760{
1761        __be32 *p;
1762
1763        encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1764                decode_bind_conn_to_session_maxsz, hdr);
1765        encode_opaque_fixed(xdr, args->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1766        p = xdr_reserve_space(xdr, 8);
1767        *p++ = cpu_to_be32(args->dir);
1768        *p = (args->use_conn_in_rdma_mode) ? cpu_to_be32(1) : cpu_to_be32(0);
1769}
1770
1771static void encode_op_map(struct xdr_stream *xdr, const struct nfs4_op_map *op_map)
1772{
1773        unsigned int i;
1774        encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
1775        for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
1776                encode_uint32(xdr, op_map->u.words[i]);
1777}
1778
1779static void encode_exchange_id(struct xdr_stream *xdr,
1780                               const struct nfs41_exchange_id_args *args,
1781                               struct compound_hdr *hdr)
1782{
1783        __be32 *p;
1784        char impl_name[IMPL_NAME_LIMIT];
1785        int len = 0;
1786
1787        encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1788        encode_nfs4_verifier(xdr, &args->verifier);
1789
1790        encode_string(xdr, strlen(args->client->cl_owner_id),
1791                        args->client->cl_owner_id);
1792
1793        encode_uint32(xdr, args->flags);
1794        encode_uint32(xdr, args->state_protect.how);
1795
1796        switch (args->state_protect.how) {
1797        case SP4_NONE:
1798                break;
1799        case SP4_MACH_CRED:
1800                encode_op_map(xdr, &args->state_protect.enforce);
1801                encode_op_map(xdr, &args->state_protect.allow);
1802                break;
1803        default:
1804                WARN_ON_ONCE(1);
1805                break;
1806        }
1807
1808        if (send_implementation_id &&
1809            sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1810            sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1811                <= sizeof(impl_name) + 1)
1812                len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1813                               utsname()->sysname, utsname()->release,
1814                               utsname()->version, utsname()->machine);
1815
1816        if (len > 0) {
1817                encode_uint32(xdr, 1);  /* implementation id array length=1 */
1818
1819                encode_string(xdr,
1820                        sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1821                        CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1822                encode_string(xdr, len, impl_name);
1823                /* just send zeros for nii_date - the date is in nii_name */
1824                p = reserve_space(xdr, 12);
1825                p = xdr_encode_hyper(p, 0);
1826                *p = cpu_to_be32(0);
1827        } else
1828                encode_uint32(xdr, 0);  /* implementation id array length=0 */
1829}
1830
1831static void encode_create_session(struct xdr_stream *xdr,
1832                                  const struct nfs41_create_session_args *args,
1833                                  struct compound_hdr *hdr)
1834{
1835        __be32 *p;
1836        struct nfs_client *clp = args->client;
1837        struct rpc_clnt *clnt = clp->cl_rpcclient;
1838        struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1839        u32 max_resp_sz_cached;
1840
1841        /*
1842         * Assumes OPEN is the biggest non-idempotent compound.
1843         * 2 is the verifier.
1844         */
1845        max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE + 2)
1846                                * XDR_UNIT + RPC_MAX_AUTH_SIZE;
1847
1848        encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1849        p = reserve_space(xdr, 16 + 2*28 + 20 + clnt->cl_nodelen + 12);
1850        p = xdr_encode_hyper(p, args->clientid);
1851        *p++ = cpu_to_be32(args->seqid);                        /*Sequence id */
1852        *p++ = cpu_to_be32(args->flags);                        /*flags */
1853
1854        /* Fore Channel */
1855        *p++ = cpu_to_be32(0);                          /* header padding size */
1856        *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1857        *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1858        *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1859        *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1860        *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1861        *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1862
1863        /* Back Channel */
1864        *p++ = cpu_to_be32(0);                          /* header padding size */
1865        *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1866        *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1867        *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1868        *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1869        *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1870        *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1871
1872        *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1873        *p++ = cpu_to_be32(1);
1874        *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1875
1876        /* authsys_parms rfc1831 */
1877        *p++ = cpu_to_be32(ktime_to_ns(nn->boot_time)); /* stamp */
1878        p = xdr_encode_array(p, clnt->cl_nodename, clnt->cl_nodelen);
1879        *p++ = cpu_to_be32(0);                          /* UID */
1880        *p++ = cpu_to_be32(0);                          /* GID */
1881        *p = cpu_to_be32(0);                            /* No more gids */
1882}
1883
1884static void encode_destroy_session(struct xdr_stream *xdr,
1885                                   const struct nfs4_session *session,
1886                                   struct compound_hdr *hdr)
1887{
1888        encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1889        encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1890}
1891
1892static void encode_destroy_clientid(struct xdr_stream *xdr,
1893                                   uint64_t clientid,
1894                                   struct compound_hdr *hdr)
1895{
1896        encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1897        encode_uint64(xdr, clientid);
1898}
1899
1900static void encode_reclaim_complete(struct xdr_stream *xdr,
1901                                    const struct nfs41_reclaim_complete_args *args,
1902                                    struct compound_hdr *hdr)
1903{
1904        encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1905        encode_uint32(xdr, args->one_fs);
1906}
1907#endif /* CONFIG_NFS_V4_1 */
1908
1909static void encode_sequence(struct xdr_stream *xdr,
1910                            const struct nfs4_sequence_args *args,
1911                            struct compound_hdr *hdr)
1912{
1913#if defined(CONFIG_NFS_V4_1)
1914        struct nfs4_session *session;
1915        struct nfs4_slot_table *tp;
1916        struct nfs4_slot *slot = args->sa_slot;
1917        __be32 *p;
1918
1919        tp = slot->table;
1920        session = tp->session;
1921        if (!session)
1922                return;
1923
1924        encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1925
1926        /*
1927         * Sessionid + seqid + slotid + max slotid + cache_this
1928         */
1929        dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1930                "max_slotid=%d cache_this=%d\n",
1931                __func__,
1932                ((u32 *)session->sess_id.data)[0],
1933                ((u32 *)session->sess_id.data)[1],
1934                ((u32 *)session->sess_id.data)[2],
1935                ((u32 *)session->sess_id.data)[3],
1936                slot->seq_nr, slot->slot_nr,
1937                tp->highest_used_slotid, args->sa_cache_this);
1938        p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1939        p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1940        *p++ = cpu_to_be32(slot->seq_nr);
1941        *p++ = cpu_to_be32(slot->slot_nr);
1942        *p++ = cpu_to_be32(tp->highest_used_slotid);
1943        *p = cpu_to_be32(args->sa_cache_this);
1944#endif /* CONFIG_NFS_V4_1 */
1945}
1946
1947#ifdef CONFIG_NFS_V4_1
1948static void
1949encode_getdeviceinfo(struct xdr_stream *xdr,
1950                     const struct nfs4_getdeviceinfo_args *args,
1951                     struct compound_hdr *hdr)
1952{
1953        __be32 *p;
1954
1955        encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1956        p = reserve_space(xdr, NFS4_DEVICEID4_SIZE + 4 + 4);
1957        p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1958                                    NFS4_DEVICEID4_SIZE);
1959        *p++ = cpu_to_be32(args->pdev->layout_type);
1960        *p++ = cpu_to_be32(args->pdev->maxcount);       /* gdia_maxcount */
1961
1962        p = reserve_space(xdr, 4 + 4);
1963        *p++ = cpu_to_be32(1);                  /* bitmap length */
1964        *p++ = cpu_to_be32(args->notify_types);
1965}
1966
1967static void
1968encode_layoutget(struct xdr_stream *xdr,
1969                      const struct nfs4_layoutget_args *args,
1970                      struct compound_hdr *hdr)
1971{
1972        __be32 *p;
1973
1974        encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1975        p = reserve_space(xdr, 36);
1976        *p++ = cpu_to_be32(0);     /* Signal layout available */
1977        *p++ = cpu_to_be32(args->type);
1978        *p++ = cpu_to_be32(args->range.iomode);
1979        p = xdr_encode_hyper(p, args->range.offset);
1980        p = xdr_encode_hyper(p, args->range.length);
1981        p = xdr_encode_hyper(p, args->minlength);
1982        encode_nfs4_stateid(xdr, &args->stateid);
1983        encode_uint32(xdr, args->maxcount);
1984
1985        dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1986                __func__,
1987                args->type,
1988                args->range.iomode,
1989                (unsigned long)args->range.offset,
1990                (unsigned long)args->range.length,
1991                args->maxcount);
1992}
1993
1994static int
1995encode_layoutcommit(struct xdr_stream *xdr,
1996                    struct inode *inode,
1997                    const struct nfs4_layoutcommit_args *args,
1998                    struct compound_hdr *hdr)
1999{
2000        __be32 *p;

2001
2002        dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
2003                NFS_SERVER(args->inode)->pnfs_curr_ld->id);
2004
2005        encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
2006        p = reserve_space(xdr, 20);
2007        /* Only whole file layouts */
2008        p = xdr_encode_hyper(p, 0); /* offset */
2009        p = xdr_encode_hyper(p, args->lastbytewritten + 1);     /* length */
2010        *p = cpu_to_be32(0); /* reclaim */
2011        encode_nfs4_stateid(xdr, &args->stateid);
2012        if (args->lastbytewritten != U64_MAX) {
2013                p = reserve_space(xdr, 20);
2014                *p++ = cpu_to_be32(1); /* newoffset = TRUE */
2015                p = xdr_encode_hyper(p, args->lastbytewritten);
2016        } else {
2017                p = reserve_space(xdr, 12);
2018                *p++ = cpu_to_be32(0); /* newoffset = FALSE */
2019        }
2020        *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
2021        *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
2022
2023        encode_uint32(xdr, args->layoutupdate_len);
2024        if (args->layoutupdate_pages)
2025                xdr_write_pages(xdr, args->layoutupdate_pages, 0,
2026                                args->layoutupdate_len);
2027
2028        return 0;
2029}
2030
2031static void
2032encode_layoutreturn(struct xdr_stream *xdr,
2033                    const struct nfs4_layoutreturn_args *args,
2034                    struct compound_hdr *hdr)
2035{
2036        __be32 *p;
2037
2038        encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2039        p = reserve_space(xdr, 16);
2040        *p++ = cpu_to_be32(0);          /* reclaim. always 0 for now */
2041        *p++ = cpu_to_be32(args->layout_type);
2042        *p++ = cpu_to_be32(args->range.iomode);
2043        *p = cpu_to_be32(RETURN_FILE);
2044        p = reserve_space(xdr, 16);
2045        p = xdr_encode_hyper(p, args->range.offset);
2046        p = xdr_encode_hyper(p, args->range.length);
2047        spin_lock(&args->inode->i_lock);
2048        encode_nfs4_stateid(xdr, &args->stateid);
2049        spin_unlock(&args->inode->i_lock);
2050        if (args->ld_private->ops && args->ld_private->ops->encode)
2051                args->ld_private->ops->encode(xdr, args, args->ld_private);
2052        else
2053                encode_uint32(xdr, 0);
2054}
2055
2056static int
2057encode_secinfo_no_name(struct xdr_stream *xdr,
2058                       const struct nfs41_secinfo_no_name_args *args,
2059                       struct compound_hdr *hdr)
2060{
2061        encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2062        encode_uint32(xdr, args->style);
2063        return 0;
2064}
2065
2066static void encode_test_stateid(struct xdr_stream *xdr,
2067                                const struct nfs41_test_stateid_args *args,
2068                                struct compound_hdr *hdr)
2069{
2070        encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2071        encode_uint32(xdr, 1);
2072        encode_nfs4_stateid(xdr, args->stateid);
2073}
2074
2075static void encode_free_stateid(struct xdr_stream *xdr,
2076                                const struct nfs41_free_stateid_args *args,
2077                                struct compound_hdr *hdr)
2078{
2079        encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2080        encode_nfs4_stateid(xdr, &args->stateid);
2081}
2082#else
2083static inline void
2084encode_layoutreturn(struct xdr_stream *xdr,
2085                    const struct nfs4_layoutreturn_args *args,
2086                    struct compound_hdr *hdr)
2087{
2088}
2089#endif /* CONFIG_NFS_V4_1 */
2090
2091/*
2092 * END OF "GENERIC" ENCODE ROUTINES.
2093 */
2094
2095static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2096{
2097#if defined(CONFIG_NFS_V4_1)
2098        struct nfs4_session *session = args->sa_slot->table->session;
2099        if (session)
2100                return session->clp->cl_mvops->minor_version;
2101#endif /* CONFIG_NFS_V4_1 */
2102        return 0;
2103}
2104
2105/*
2106 * Encode an ACCESS request
2107 */
2108static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2109                                const void *data)
2110{
2111        const struct nfs4_accessargs *args = data;
2112        struct compound_hdr hdr = {
2113                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2114        };
2115
2116        encode_compound_hdr(xdr, req, &hdr);
2117        encode_sequence(xdr, &args->seq_args, &hdr);
2118        encode_putfh(xdr, args->fh, &hdr);
2119        encode_access(xdr, args->access, &hdr);
2120        encode_getfattr(xdr, args->bitmask, &hdr);
2121        encode_nops(&hdr);
2122}
2123
2124/*
2125 * Encode LOOKUP request
2126 */
2127static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2128                                const void *data)
2129{
2130        const struct nfs4_lookup_arg *args = data;
2131        struct compound_hdr hdr = {
2132                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2133        };
2134
2135        encode_compound_hdr(xdr, req, &hdr);
2136        encode_sequence(xdr, &args->seq_args, &hdr);
2137        encode_putfh(xdr, args->dir_fh, &hdr);
2138        encode_lookup(xdr, args->name, &hdr);
2139        encode_getfh(xdr, &hdr);
2140        encode_getfattr(xdr, args->bitmask, &hdr);
2141        encode_nops(&hdr);
2142}
2143
2144/*
2145 * Encode LOOKUPP request
2146 */
2147static void nfs4_xdr_enc_lookupp(struct rpc_rqst *req, struct xdr_stream *xdr,
2148                const void *data)
2149{
2150        const struct nfs4_lookupp_arg *args = data;
2151        struct compound_hdr hdr = {
2152                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2153        };
2154
2155        encode_compound_hdr(xdr, req, &hdr);
2156        encode_sequence(xdr, &args->seq_args, &hdr);
2157        encode_putfh(xdr, args->fh, &hdr);
2158        encode_lookupp(xdr, &hdr);
2159        encode_getfh(xdr, &hdr);
2160        encode_getfattr(xdr, args->bitmask, &hdr);
2161        encode_nops(&hdr);
2162}
2163
2164/*
2165 * Encode LOOKUP_ROOT request
2166 */
2167static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2168                                     struct xdr_stream *xdr,
2169                                     const void *data)
2170{
2171        const struct nfs4_lookup_root_arg *args = data;
2172        struct compound_hdr hdr = {
2173                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2174        };
2175
2176        encode_compound_hdr(xdr, req, &hdr);
2177        encode_sequence(xdr, &args->seq_args, &hdr);
2178        encode_putrootfh(xdr, &hdr);
2179        encode_getfh(xdr, &hdr);
2180        encode_getfattr(xdr, args->bitmask, &hdr);
2181        encode_nops(&hdr);
2182}
2183
2184/*
2185 * Encode REMOVE request
2186 */
2187static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2188                                const void *data)
2189{
2190        const struct nfs_removeargs *args = data;
2191        struct compound_hdr hdr = {
2192                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2193        };
2194
2195        encode_compound_hdr(xdr, req, &hdr);
2196        encode_sequence(xdr, &args->seq_args, &hdr);
2197        encode_putfh(xdr, args->fh, &hdr);
2198        encode_remove(xdr, &args->name, &hdr);
2199        encode_nops(&hdr);
2200}
2201
2202/*
2203 * Encode RENAME request
2204 */
2205static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2206                                const void *data)
2207{
2208        const struct nfs_renameargs *args = data;
2209        struct compound_hdr hdr = {
2210                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2211        };
2212
2213        encode_compound_hdr(xdr, req, &hdr);
2214        encode_sequence(xdr, &args->seq_args, &hdr);
2215        encode_putfh(xdr, args->old_dir, &hdr);
2216        encode_savefh(xdr, &hdr);
2217        encode_putfh(xdr, args->new_dir, &hdr);
2218        encode_rename(xdr, args->old_name, args->new_name, &hdr);
2219        encode_nops(&hdr);
2220}
2221
2222/*
2223 * Encode LINK request
2224 */
2225static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2226                              const void *data)
2227{
2228        const struct nfs4_link_arg *args = data;
2229        struct compound_hdr hdr = {
2230                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2231        };
2232
2233        encode_compound_hdr(xdr, req, &hdr);
2234        encode_sequence(xdr, &args->seq_args, &hdr);
2235        encode_putfh(xdr, args->fh, &hdr);
2236        encode_savefh(xdr, &hdr);
2237        encode_putfh(xdr, args->dir_fh, &hdr);
2238        encode_link(xdr, args->name, &hdr);
2239        encode_restorefh(xdr, &hdr);
2240        encode_getfattr(xdr, args->bitmask, &hdr);
2241        encode_nops(&hdr);
2242}
2243
2244/*
2245 * Encode CREATE request
2246 */
2247static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2248                                const void *data)
2249{
2250        const struct nfs4_create_arg *args = data;
2251        struct compound_hdr hdr = {
2252                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2253        };
2254
2255        encode_compound_hdr(xdr, req, &hdr);
2256        encode_sequence(xdr, &args->seq_args, &hdr);
2257        encode_putfh(xdr, args->dir_fh, &hdr);
2258        encode_create(xdr, args, &hdr);
2259        encode_getfh(xdr, &hdr);
2260        encode_getfattr(xdr, args->bitmask, &hdr);
2261        encode_nops(&hdr);
2262}
2263
2264/*
2265 * Encode SYMLINK request
2266 */
2267static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2268                                 const void *data)
2269{
2270        const struct nfs4_create_arg *args = data;
2271
2272        nfs4_xdr_enc_create(req, xdr, args);
2273}
2274
2275/*
2276 * Encode GETATTR request
2277 */
2278static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2279                                 const void *data)
2280{
2281        const struct nfs4_getattr_arg *args = data;
2282        struct compound_hdr hdr = {
2283                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2284        };
2285
2286        encode_compound_hdr(xdr, req, &hdr);
2287        encode_sequence(xdr, &args->seq_args, &hdr);
2288        encode_putfh(xdr, args->fh, &hdr);
2289        encode_getfattr(xdr, args->bitmask, &hdr);
2290        encode_nops(&hdr);
2291}
2292
2293/*
2294 * Encode a CLOSE request
2295 */
2296static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2297                               const void *data)
2298{
2299        const struct nfs_closeargs *args = data;
2300        struct compound_hdr hdr = {
2301                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2302        };
2303
2304        encode_compound_hdr(xdr, req, &hdr);
2305        encode_sequence(xdr, &args->seq_args, &hdr);
2306        encode_putfh(xdr, args->fh, &hdr);
2307        if (args->lr_args)
2308                encode_layoutreturn(xdr, args->lr_args, &hdr);
2309        if (args->bitmask != NULL)
2310                encode_getfattr(xdr, args->bitmask, &hdr);
2311        encode_close(xdr, args, &hdr);
2312        encode_nops(&hdr);
2313}
2314
2315/*
2316 * Encode an OPEN request
2317 */
2318static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2319                              const void *data)
2320{
2321        const struct nfs_openargs *args = data;
2322        struct compound_hdr hdr = {
2323                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2324        };
2325
2326        encode_compound_hdr(xdr, req, &hdr);
2327        encode_sequence(xdr, &args->seq_args, &hdr);
2328        encode_putfh(xdr, args->fh, &hdr);
2329        encode_open(xdr, args, &hdr);
2330        encode_getfh(xdr, &hdr);
2331        if (args->access)
2332                encode_access(xdr, args->access, &hdr);
2333        encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2334        encode_nops(&hdr);
2335}
2336
2337/*
2338 * Encode an OPEN_CONFIRM request
2339 */
2340static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2341                                      struct xdr_stream *xdr,
2342                                      const void *data)
2343{
2344        const struct nfs_open_confirmargs *args = data;
2345        struct compound_hdr hdr = {
2346                .nops   = 0,
2347        };
2348
2349        encode_compound_hdr(xdr, req, &hdr);
2350        encode_putfh(xdr, args->fh, &hdr);
2351        encode_open_confirm(xdr, args, &hdr);
2352        encode_nops(&hdr);
2353}
2354
2355/*
2356 * Encode an OPEN request with no attributes.
2357 */
2358static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2359                                     struct xdr_stream *xdr,
2360                                     const void *data)
2361{
2362        const struct nfs_openargs *args = data;
2363        struct compound_hdr hdr = {
2364                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2365        };
2366
2367        encode_compound_hdr(xdr, req, &hdr);
2368        encode_sequence(xdr, &args->seq_args, &hdr);
2369        encode_putfh(xdr, args->fh, &hdr);
2370        encode_open(xdr, args, &hdr);
2371        if (args->access)
2372                encode_access(xdr, args->access, &hdr);
2373        encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2374        encode_nops(&hdr);
2375}
2376
2377/*
2378 * Encode an OPEN_DOWNGRADE request
2379 */
2380static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2381                                        struct xdr_stream *xdr,
2382                                        const void *data)
2383{
2384        const struct nfs_closeargs *args = data;
2385        struct compound_hdr hdr = {
2386                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2387        };
2388
2389        encode_compound_hdr(xdr, req, &hdr);
2390        encode_sequence(xdr, &args->seq_args, &hdr);
2391        encode_putfh(xdr, args->fh, &hdr);
2392        if (args->lr_args)
2393                encode_layoutreturn(xdr, args->lr_args, &hdr);
2394        encode_open_downgrade(xdr, args, &hdr);
2395        encode_nops(&hdr);
2396}
2397
2398/*
2399 * Encode a LOCK request
2400 */
2401static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2402                              const void *data)
2403{
2404        const struct nfs_lock_args *args = data;
2405        struct compound_hdr hdr = {
2406                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2407        };
2408
2409        encode_compound_hdr(xdr, req, &hdr);
2410        encode_sequence(xdr, &args->seq_args, &hdr);
2411        encode_putfh(xdr, args->fh, &hdr);
2412        encode_lock(xdr, args, &hdr);
2413        encode_nops(&hdr);
2414}
2415
2416/*
2417 * Encode a LOCKT request
2418 */
2419static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2420                               const void *data)
2421{
2422        const struct nfs_lockt_args *args = data;
2423        struct compound_hdr hdr = {
2424                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2425        };
2426
2427        encode_compound_hdr(xdr, req, &hdr);
2428        encode_sequence(xdr, &args->seq_args, &hdr);
2429        encode_putfh(xdr, args->fh, &hdr);
2430        encode_lockt(xdr, args, &hdr);
2431        encode_nops(&hdr);
2432}
2433
2434/*
2435 * Encode a LOCKU request
2436 */
2437static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2438                               const void *data)
2439{
2440        const struct nfs_locku_args *args = data;
2441        struct compound_hdr hdr = {
2442                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2443        };
2444
2445        encode_compound_hdr(xdr, req, &hdr);
2446        encode_sequence(xdr, &args->seq_args, &hdr);
2447        encode_putfh(xdr, args->fh, &hdr);
2448        encode_locku(xdr, args, &hdr);
2449        encode_nops(&hdr);
2450}
2451
2452static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2453                                           struct xdr_stream *xdr,
2454                                           const void *data)
2455{
2456        const struct nfs_release_lockowner_args *args = data;
2457        struct compound_hdr hdr = {
2458                .minorversion = 0,
2459        };
2460
2461        encode_compound_hdr(xdr, req, &hdr);
2462        encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2463        encode_nops(&hdr);
2464}
2465
2466/*
2467 * Encode a READLINK request
2468 */
2469static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2470                                  const void *data)
2471{
2472        const struct nfs4_readlink *args = data;
2473        struct compound_hdr hdr = {
2474                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2475        };
2476
2477        encode_compound_hdr(xdr, req, &hdr);
2478        encode_sequence(xdr, &args->seq_args, &hdr);
2479        encode_putfh(xdr, args->fh, &hdr);
2480        encode_readlink(xdr, args, req, &hdr);
2481
2482        xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2483                        args->pgbase, args->pglen);
2484        encode_nops(&hdr);
2485}
2486
2487/*
2488 * Encode a READDIR request
2489 */
2490static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2491                                 const void *data)
2492{
2493        const struct nfs4_readdir_arg *args = data;
2494        struct compound_hdr hdr = {
2495                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2496        };
2497
2498        encode_compound_hdr(xdr, req, &hdr);
2499        encode_sequence(xdr, &args->seq_args, &hdr);
2500        encode_putfh(xdr, args->fh, &hdr);
2501        encode_readdir(xdr, args, req, &hdr);
2502
2503        xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2504                         args->pgbase, args->count);
2505        dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2506                        __func__, hdr.replen << 2, args->pages,
2507                        args->pgbase, args->count);
2508        encode_nops(&hdr);
2509}
2510
2511/*
2512 * Encode a READ request
2513 */
2514static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2515                              const void *data)
2516{
2517        const struct nfs_pgio_args *args = data;
2518        struct compound_hdr hdr = {
2519                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2520        };
2521
2522        encode_compound_hdr(xdr, req, &hdr);
2523        encode_sequence(xdr, &args->seq_args, &hdr);
2524        encode_putfh(xdr, args->fh, &hdr);
2525        encode_read(xdr, args, &hdr);
2526
2527        xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2528                         args->pages, args->pgbase, args->count);
2529        req->rq_rcv_buf.flags |= XDRBUF_READ;
2530        encode_nops(&hdr);
2531}
2532
2533/*
2534 * Encode an SETATTR request
2535 */
2536static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2537                                 const void *data)
2538{
2539        const struct nfs_setattrargs *args = data;
2540        struct compound_hdr hdr = {
2541                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2542        };
2543
2544        encode_compound_hdr(xdr, req, &hdr);
2545        encode_sequence(xdr, &args->seq_args, &hdr);
2546        encode_putfh(xdr, args->fh, &hdr);
2547        encode_setattr(xdr, args, args->server, &hdr);
2548        encode_getfattr(xdr, args->bitmask, &hdr);
2549        encode_nops(&hdr);
2550}
2551
2552/*
2553 * Encode a GETACL request
2554 */
2555static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2556                                const void *data)
2557{
2558        const struct nfs_getaclargs *args = data;
2559        struct compound_hdr hdr = {
2560                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2561        };
2562        uint32_t replen;
2563
2564        encode_compound_hdr(xdr, req, &hdr);
2565        encode_sequence(xdr, &args->seq_args, &hdr);
2566        encode_putfh(xdr, args->fh, &hdr);
2567        replen = hdr.replen + op_decode_hdr_maxsz;
2568        encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2569
2570        xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2571                args->acl_pages, 0, args->acl_len);
2572
2573        encode_nops(&hdr);
2574}
2575
2576/*
2577 * Encode a WRITE request
2578 */
2579static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2580                               const void *data)
2581{
2582        const struct nfs_pgio_args *args = data;
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->fh, &hdr);
2590        encode_write(xdr, args, &hdr);
2591        req->rq_snd_buf.flags |= XDRBUF_WRITE;
2592        if (args->bitmask)
2593                encode_getfattr(xdr, args->bitmask, &hdr);
2594        encode_nops(&hdr);
2595}
2596
2597/*
2598 *  a COMMIT request
2599 */
2600static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2601                                const void *data)
2602{
2603        const struct nfs_commitargs *args = data;
2604        struct compound_hdr hdr = {
2605                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2606        };
2607
2608        encode_compound_hdr(xdr, req, &hdr);
2609        encode_sequence(xdr, &args->seq_args, &hdr);
2610        encode_putfh(xdr, args->fh, &hdr);
2611        encode_commit(xdr, args, &hdr);
2612        encode_nops(&hdr);
2613}
2614
2615/*
2616 * FSINFO request
2617 */
2618static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2619                                const void *data)
2620{
2621        const struct nfs4_fsinfo_arg *args = data;
2622        struct compound_hdr hdr = {
2623                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2624        };
2625
2626        encode_compound_hdr(xdr, req, &hdr);
2627        encode_sequence(xdr, &args->seq_args, &hdr);
2628        encode_putfh(xdr, args->fh, &hdr);
2629        encode_fsinfo(xdr, args->bitmask, &hdr);
2630        encode_nops(&hdr);
2631}
2632
2633/*
2634 * a PATHCONF request
2635 */
2636static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2637                                  const void *data)
2638{
2639        const struct nfs4_pathconf_arg *args = data;
2640        struct compound_hdr hdr = {
2641                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2642        };
2643
2644        encode_compound_hdr(xdr, req, &hdr);
2645        encode_sequence(xdr, &args->seq_args, &hdr);
2646        encode_putfh(xdr, args->fh, &hdr);
2647        encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2648                           &hdr);
2649        encode_nops(&hdr);
2650}
2651
2652/*
2653 * a STATFS request
2654 */
2655static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2656                                const void *data)
2657{
2658        const struct nfs4_statfs_arg *args = data;
2659        struct compound_hdr hdr = {
2660                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2661        };
2662
2663        encode_compound_hdr(xdr, req, &hdr);
2664        encode_sequence(xdr, &args->seq_args, &hdr);
2665        encode_putfh(xdr, args->fh, &hdr);
2666        encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2667                           args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2668        encode_nops(&hdr);
2669}
2670
2671/*
2672 * GETATTR_BITMAP request
2673 */
2674static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2675                                     struct xdr_stream *xdr,
2676                                     const void *data)
2677{
2678        const struct nfs4_server_caps_arg *args = data;
2679        const u32 *bitmask = args->bitmask;
2680        struct compound_hdr hdr = {
2681                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2682        };
2683
2684        encode_compound_hdr(xdr, req, &hdr);
2685        encode_sequence(xdr, &args->seq_args, &hdr);
2686        encode_putfh(xdr, args->fhandle, &hdr);
2687        encode_getattr_three(xdr, bitmask[0], bitmask[1], bitmask[2], &hdr);
2688        encode_nops(&hdr);
2689}
2690
2691/*
2692 * a RENEW request
2693 */
2694static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2695                               const void *data)
2696
2697{
2698        const struct nfs_client *clp = data;
2699        struct compound_hdr hdr = {
2700                .nops   = 0,
2701        };
2702
2703        encode_compound_hdr(xdr, req, &hdr);
2704        encode_renew(xdr, clp->cl_clientid, &hdr);
2705        encode_nops(&hdr);
2706}
2707
2708/*
2709 * a SETCLIENTID request
2710 */
2711static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2712                                     struct xdr_stream *xdr,
2713                                     const void *data)
2714{
2715        const struct nfs4_setclientid *sc = data;
2716        struct compound_hdr hdr = {
2717                .nops   = 0,
2718        };
2719
2720        encode_compound_hdr(xdr, req, &hdr);
2721        encode_setclientid(xdr, sc, &hdr);
2722        encode_nops(&hdr);
2723}
2724
2725/*
2726 * a SETCLIENTID_CONFIRM request
2727 */
2728static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2729                                             struct xdr_stream *xdr,
2730                                             const void *data)
2731{
2732        const struct nfs4_setclientid_res *arg = data;
2733        struct compound_hdr hdr = {
2734                .nops   = 0,
2735        };
2736
2737        encode_compound_hdr(xdr, req, &hdr);
2738        encode_setclientid_confirm(xdr, arg, &hdr);
2739        encode_nops(&hdr);
2740}
2741
2742/*
2743 * DELEGRETURN request
2744 */
2745static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2746                                     struct xdr_stream *xdr,
2747                                     const void *data)
2748{
2749        const struct nfs4_delegreturnargs *args = data;
2750        struct compound_hdr hdr = {
2751                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2752        };
2753
2754        encode_compound_hdr(xdr, req, &hdr);
2755        encode_sequence(xdr, &args->seq_args, &hdr);
2756        encode_putfh(xdr, args->fhandle, &hdr);
2757        if (args->lr_args)
2758                encode_layoutreturn(xdr, args->lr_args, &hdr);
2759        if (args->bitmask)
2760                encode_getfattr(xdr, args->bitmask, &hdr);
2761        encode_delegreturn(xdr, args->stateid, &hdr);
2762        encode_nops(&hdr);
2763}
2764
2765/*
2766 * Encode FS_LOCATIONS request
2767 */
2768static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2769                                      struct xdr_stream *xdr,
2770                                      const void *data)
2771{
2772        const struct nfs4_fs_locations_arg *args = data;
2773        struct compound_hdr hdr = {
2774                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2775        };
2776        uint32_t replen;
2777
2778        encode_compound_hdr(xdr, req, &hdr);
2779        encode_sequence(xdr, &args->seq_args, &hdr);
2780        if (args->migration) {
2781                encode_putfh(xdr, args->fh, &hdr);
2782                replen = hdr.replen;
2783                encode_fs_locations(xdr, args->bitmask, &hdr);
2784                if (args->renew)
2785                        encode_renew(xdr, args->clientid, &hdr);
2786        } else {
2787                encode_putfh(xdr, args->dir_fh, &hdr);
2788                encode_lookup(xdr, args->name, &hdr);
2789                replen = hdr.replen;
2790                encode_fs_locations(xdr, args->bitmask, &hdr);
2791        }
2792
2793        /* Set up reply kvec to capture returned fs_locations array. */
2794        xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2795                         (struct page **)&args->page, 0, PAGE_SIZE);
2796        encode_nops(&hdr);
2797}
2798
2799/*
2800 * Encode SECINFO request
2801 */
2802static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2803                                struct xdr_stream *xdr,
2804                                const void *data)
2805{
2806        const struct nfs4_secinfo_arg *args = data;
2807        struct compound_hdr hdr = {
2808                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2809        };
2810
2811        encode_compound_hdr(xdr, req, &hdr);
2812        encode_sequence(xdr, &args->seq_args, &hdr);
2813        encode_putfh(xdr, args->dir_fh, &hdr);
2814        encode_secinfo(xdr, args->name, &hdr);
2815        encode_nops(&hdr);
2816}
2817
2818/*
2819 * Encode FSID_PRESENT request
2820 */
2821static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2822                                      struct xdr_stream *xdr,
2823                                      const void *data)
2824{
2825        const struct nfs4_fsid_present_arg *args = data;
2826        struct compound_hdr hdr = {
2827                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2828        };
2829
2830        encode_compound_hdr(xdr, req, &hdr);
2831        encode_sequence(xdr, &args->seq_args, &hdr);
2832        encode_putfh(xdr, args->fh, &hdr);
2833        encode_getfh(xdr, &hdr);
2834        if (args->renew)
2835                encode_renew(xdr, args->clientid, &hdr);
2836        encode_nops(&hdr);
2837}
2838
2839#if defined(CONFIG_NFS_V4_1)
2840/*
2841 * BIND_CONN_TO_SESSION request
2842 */
2843static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2844                                struct xdr_stream *xdr,
2845                                const void *data)
2846{
2847        const struct nfs41_bind_conn_to_session_args *args = data;
2848        struct compound_hdr hdr = {
2849                .minorversion = args->client->cl_mvops->minor_version,
2850        };
2851
2852        encode_compound_hdr(xdr, req, &hdr);
2853        encode_bind_conn_to_session(xdr, args, &hdr);
2854        encode_nops(&hdr);
2855}
2856
2857/*
2858 * EXCHANGE_ID request
2859 */
2860static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2861                                     struct xdr_stream *xdr,
2862                                     const void *data)
2863{
2864        const struct nfs41_exchange_id_args *args = data;
2865        struct compound_hdr hdr = {
2866                .minorversion = args->client->cl_mvops->minor_version,
2867        };
2868
2869        encode_compound_hdr(xdr, req, &hdr);
2870        encode_exchange_id(xdr, args, &hdr);
2871        encode_nops(&hdr);
2872}
2873
2874/*
2875 * a CREATE_SESSION request
2876 */
2877static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2878                                        struct xdr_stream *xdr,
2879                                        const void *data)
2880{
2881        const struct nfs41_create_session_args *args = data;
2882        struct compound_hdr hdr = {
2883                .minorversion = args->client->cl_mvops->minor_version,
2884        };
2885
2886        encode_compound_hdr(xdr, req, &hdr);
2887        encode_create_session(xdr, args, &hdr);
2888        encode_nops(&hdr);
2889}
2890
2891/*
2892 * a DESTROY_SESSION request
2893 */
2894static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2895                                         struct xdr_stream *xdr,
2896                                         const void *data)
2897{
2898        const struct nfs4_session *session = data;
2899        struct compound_hdr hdr = {
2900                .minorversion = session->clp->cl_mvops->minor_version,
2901        };
2902
2903        encode_compound_hdr(xdr, req, &hdr);
2904        encode_destroy_session(xdr, session, &hdr);
2905        encode_nops(&hdr);
2906}
2907
2908/*
2909 * a DESTROY_CLIENTID request
2910 */
2911static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2912                                         struct xdr_stream *xdr,
2913                                         const void *data)
2914{
2915        const struct nfs_client *clp = data;
2916        struct compound_hdr hdr = {
2917                .minorversion = clp->cl_mvops->minor_version,
2918        };
2919
2920        encode_compound_hdr(xdr, req, &hdr);
2921        encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2922        encode_nops(&hdr);
2923}
2924
2925/*
2926 * a SEQUENCE request
2927 */
2928static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2929                                  const void *data)
2930{
2931        const struct nfs4_sequence_args *args = data;
2932        struct compound_hdr hdr = {
2933                .minorversion = nfs4_xdr_minorversion(args),
2934        };
2935
2936        encode_compound_hdr(xdr, req, &hdr);
2937        encode_sequence(xdr, args, &hdr);
2938        encode_nops(&hdr);
2939}
2940
2941/*
2942 * a GET_LEASE_TIME request
2943 */
2944static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2945                                        struct xdr_stream *xdr,
2946                                        const void *data)
2947{
2948        const struct nfs4_get_lease_time_args *args = data;
2949        struct compound_hdr hdr = {
2950                .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2951        };
2952        const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2953
2954        encode_compound_hdr(xdr, req, &hdr);
2955        encode_sequence(xdr, &args->la_seq_args, &hdr);
2956        encode_putrootfh(xdr, &hdr);
2957        encode_fsinfo(xdr, lease_bitmap, &hdr);
2958        encode_nops(&hdr);
2959}
2960
2961/*
2962 * a RECLAIM_COMPLETE request
2963 */
2964static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2965                                          struct xdr_stream *xdr,
2966                                          const void *data)
2967{
2968        const struct nfs41_reclaim_complete_args *args = data;
2969        struct compound_hdr hdr = {
2970                .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2971        };
2972
2973        encode_compound_hdr(xdr, req, &hdr);
2974        encode_sequence(xdr, &args->seq_args, &hdr);
2975        encode_reclaim_complete(xdr, args, &hdr);
2976        encode_nops(&hdr);
2977}
2978
2979/*
2980 * Encode GETDEVICEINFO request
2981 */
2982static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2983                                       struct xdr_stream *xdr,
2984                                       const void *data)
2985{
2986        const struct nfs4_getdeviceinfo_args *args = data;
2987        struct compound_hdr hdr = {
2988                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2989        };
2990
2991        encode_compound_hdr(xdr, req, &hdr);
2992        encode_sequence(xdr, &args->seq_args, &hdr);
2993        encode_getdeviceinfo(xdr, args, &hdr);
2994
2995        /* set up reply kvec. Subtract notification bitmap max size (2)
2996         * so that notification bitmap is put in xdr_buf tail */
2997        xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2998                         args->pdev->pages, args->pdev->pgbase,
2999                         args->pdev->pglen);
3000

3001        encode_nops(&hdr);
3002}
3003
3004/*
3005 *  Encode LAYOUTGET request
3006 */
3007static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
3008                                   struct xdr_stream *xdr,
3009                                   const void *data)
3010{
3011        const struct nfs4_layoutget_args *args = data;
3012        struct compound_hdr hdr = {
3013                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3014        };
3015
3016        encode_compound_hdr(xdr, req, &hdr);
3017        encode_sequence(xdr, &args->seq_args, &hdr);
3018        encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3019        encode_layoutget(xdr, args, &hdr);
3020
3021        xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
3022            args->layout.pages, 0, args->layout.pglen);
3023
3024        encode_nops(&hdr);
3025}
3026
3027/*
3028 *  Encode LAYOUTCOMMIT request
3029 */
3030static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
3031                                      struct xdr_stream *xdr,
3032                                      const void *priv)
3033{
3034        const struct nfs4_layoutcommit_args *args = priv;
3035        struct nfs4_layoutcommit_data *data =
3036                container_of(args, struct nfs4_layoutcommit_data, args);
3037        struct compound_hdr hdr = {
3038                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3039        };
3040
3041        encode_compound_hdr(xdr, req, &hdr);
3042        encode_sequence(xdr, &args->seq_args, &hdr);
3043        encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3044        encode_layoutcommit(xdr, data->args.inode, args, &hdr);
3045        encode_getfattr(xdr, args->bitmask, &hdr);
3046        encode_nops(&hdr);
3047}
3048
3049/*
3050 * Encode LAYOUTRETURN request
3051 */
3052static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
3053                                      struct xdr_stream *xdr,
3054                                      const void *data)
3055{
3056        const struct nfs4_layoutreturn_args *args = data;
3057        struct compound_hdr hdr = {
3058                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3059        };
3060
3061        encode_compound_hdr(xdr, req, &hdr);
3062        encode_sequence(xdr, &args->seq_args, &hdr);
3063        encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3064        encode_layoutreturn(xdr, args, &hdr);
3065        encode_nops(&hdr);
3066}
3067
3068/*
3069 * Encode SECINFO_NO_NAME request
3070 */
3071static void nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
3072                                        struct xdr_stream *xdr,
3073                                        const void *data)
3074{
3075        const struct nfs41_secinfo_no_name_args *args = data;
3076        struct compound_hdr hdr = {
3077                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3078        };
3079
3080        encode_compound_hdr(xdr, req, &hdr);
3081        encode_sequence(xdr, &args->seq_args, &hdr);
3082        encode_putrootfh(xdr, &hdr);
3083        encode_secinfo_no_name(xdr, args, &hdr);
3084        encode_nops(&hdr);
3085}
3086
3087/*
3088 *  Encode TEST_STATEID request
3089 */
3090static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
3091                                      struct xdr_stream *xdr,
3092                                      const void *data)
3093{
3094        const struct nfs41_test_stateid_args *args = data;
3095        struct compound_hdr hdr = {
3096                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3097        };
3098
3099        encode_compound_hdr(xdr, req, &hdr);
3100        encode_sequence(xdr, &args->seq_args, &hdr);
3101        encode_test_stateid(xdr, args, &hdr);
3102        encode_nops(&hdr);
3103}
3104
3105/*
3106 *  Encode FREE_STATEID request
3107 */
3108static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
3109                                     struct xdr_stream *xdr,
3110                                     const void *data)
3111{
3112        const struct nfs41_free_stateid_args *args = data;
3113        struct compound_hdr hdr = {
3114                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3115        };
3116
3117        encode_compound_hdr(xdr, req, &hdr);
3118        encode_sequence(xdr, &args->seq_args, &hdr);
3119        encode_free_stateid(xdr, args, &hdr);
3120        encode_nops(&hdr);
3121}
3122#endif /* CONFIG_NFS_V4_1 */
3123
3124static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
3125{
3126        dprintk("nfs: %s: prematurely hit end of receive buffer. "
3127                "Remaining buffer length is %tu words.\n",
3128                func, xdr->end - xdr->p);
3129}
3130
3131static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3132{
3133        ssize_t ret = xdr_stream_decode_opaque_inline(xdr, (void **)string,
3134                        NFS4_OPAQUE_LIMIT);
3135        if (unlikely(ret < 0)) {
3136                if (ret == -EBADMSG)
3137                        print_overflow_msg(__func__, xdr);
3138                return -EIO;
3139        }
3140        *len = ret;
3141        return 0;
3142}
3143
3144static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3145{
3146        __be32 *p;
3147
3148        p = xdr_inline_decode(xdr, 8);
3149        if (unlikely(!p))
3150                goto out_overflow;
3151        hdr->status = be32_to_cpup(p++);
3152        hdr->taglen = be32_to_cpup(p);
3153
3154        p = xdr_inline_decode(xdr, hdr->taglen + 4);
3155        if (unlikely(!p))
3156                goto out_overflow;
3157        hdr->tag = (char *)p;
3158        p += XDR_QUADLEN(hdr->taglen);
3159        hdr->nops = be32_to_cpup(p);
3160        if (unlikely(hdr->nops < 1))
3161                return nfs4_stat_to_errno(hdr->status);
3162        return 0;
3163out_overflow:
3164        print_overflow_msg(__func__, xdr);
3165        return -EIO;
3166}
3167
3168static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3169                int *nfs_retval)
3170{
3171        __be32 *p;
3172        uint32_t opnum;
3173        int32_t nfserr;
3174
3175        p = xdr_inline_decode(xdr, 8);
3176        if (unlikely(!p))
3177                goto out_overflow;
3178        opnum = be32_to_cpup(p++);
3179        if (unlikely(opnum != expected))
3180                goto out_bad_operation;
3181        nfserr = be32_to_cpup(p);
3182        if (nfserr == NFS_OK)
3183                *nfs_retval = 0;
3184        else
3185                *nfs_retval = nfs4_stat_to_errno(nfserr);
3186        return true;
3187out_bad_operation:
3188        dprintk("nfs: Server returned operation"
3189                " %d but we issued a request for %d\n",
3190                        opnum, expected);
3191        *nfs_retval = -EREMOTEIO;
3192        return false;
3193out_overflow:
3194        print_overflow_msg(__func__, xdr);
3195        *nfs_retval = -EIO;
3196        return false;
3197}
3198
3199static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3200{
3201        int retval;
3202
3203        __decode_op_hdr(xdr, expected, &retval);
3204        return retval;
3205}
3206
3207/* Dummy routine */
3208static int decode_ace(struct xdr_stream *xdr, void *ace)
3209{
3210        __be32 *p;
3211        unsigned int strlen;
3212        char *str;
3213
3214        p = xdr_inline_decode(xdr, 12);
3215        if (likely(p))
3216                return decode_opaque_inline(xdr, &strlen, &str);
3217        print_overflow_msg(__func__, xdr);
3218        return -EIO;
3219}
3220
3221static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3222{
3223        uint32_t bmlen;
3224        __be32 *p;
3225
3226        p = xdr_inline_decode(xdr, 4);
3227        if (unlikely(!p))
3228                goto out_overflow;
3229        bmlen = be32_to_cpup(p);
3230
3231        bitmap[0] = bitmap[1] = bitmap[2] = 0;
3232        p = xdr_inline_decode(xdr, (bmlen << 2));
3233        if (unlikely(!p))
3234                goto out_overflow;
3235        if (bmlen > 0) {
3236                bitmap[0] = be32_to_cpup(p++);
3237                if (bmlen > 1) {
3238                        bitmap[1] = be32_to_cpup(p++);
3239                        if (bmlen > 2)
3240                                bitmap[2] = be32_to_cpup(p);
3241                }
3242        }
3243        return 0;
3244out_overflow:
3245        print_overflow_msg(__func__, xdr);
3246        return -EIO;
3247}
3248
3249static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3250{
3251        __be32 *p;
3252
3253        p = xdr_inline_decode(xdr, 4);
3254        if (unlikely(!p))
3255                goto out_overflow;
3256        *attrlen = be32_to_cpup(p);
3257        *savep = xdr_stream_pos(xdr);
3258        return 0;
3259out_overflow:
3260        print_overflow_msg(__func__, xdr);
3261        return -EIO;
3262}
3263
3264static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3265{
3266        if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3267                int ret;
3268                ret = decode_attr_bitmap(xdr, bitmask);
3269                if (unlikely(ret < 0))
3270                        return ret;
3271                bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3272        } else
3273                bitmask[0] = bitmask[1] = bitmask[2] = 0;
3274        dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3275                bitmask[0], bitmask[1], bitmask[2]);
3276        return 0;
3277}
3278
3279static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3280{
3281        __be32 *p;
3282        int ret = 0;
3283
3284        *type = 0;
3285        if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3286                return -EIO;
3287        if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3288                p = xdr_inline_decode(xdr, 4);
3289                if (unlikely(!p))
3290                        goto out_overflow;
3291                *type = be32_to_cpup(p);
3292                if (*type < NF4REG || *type > NF4NAMEDATTR) {
3293                        dprintk("%s: bad type %d\n", __func__, *type);
3294                        return -EIO;
3295                }
3296                bitmap[0] &= ~FATTR4_WORD0_TYPE;
3297                ret = NFS_ATTR_FATTR_TYPE;
3298        }
3299        dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3300        return ret;
3301out_overflow:
3302        print_overflow_msg(__func__, xdr);
3303        return -EIO;
3304}
3305
3306static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3307                                      uint32_t *bitmap, uint32_t *type)
3308{
3309        __be32 *p;
3310
3311        *type = 0;
3312        if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3313                return -EIO;
3314        if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3315                p = xdr_inline_decode(xdr, 4);
3316                if (unlikely(!p))
3317                        goto out_overflow;
3318                *type = be32_to_cpup(p);
3319                bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3320        }
3321        dprintk("%s: expire type=0x%x\n", __func__, *type);
3322        return 0;
3323out_overflow:
3324        print_overflow_msg(__func__, xdr);
3325        return -EIO;
3326}
3327
3328static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3329{
3330        __be32 *p;
3331        int ret = 0;
3332
3333        *change = 0;
3334        if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3335                return -EIO;
3336        if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3337                p = xdr_inline_decode(xdr, 8);
3338                if (unlikely(!p))
3339                        goto out_overflow;
3340                xdr_decode_hyper(p, change);
3341                bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3342                ret = NFS_ATTR_FATTR_CHANGE;
3343        }
3344        dprintk("%s: change attribute=%Lu\n", __func__,
3345                        (unsigned long long)*change);
3346        return ret;
3347out_overflow:
3348        print_overflow_msg(__func__, xdr);
3349        return -EIO;
3350}
3351
3352static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3353{
3354        __be32 *p;
3355        int ret = 0;
3356
3357        *size = 0;
3358        if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3359                return -EIO;
3360        if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3361                p = xdr_inline_decode(xdr, 8);
3362                if (unlikely(!p))
3363                        goto out_overflow;
3364                xdr_decode_hyper(p, size);
3365                bitmap[0] &= ~FATTR4_WORD0_SIZE;
3366                ret = NFS_ATTR_FATTR_SIZE;
3367        }
3368        dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3369        return ret;
3370out_overflow:
3371        print_overflow_msg(__func__, xdr);
3372        return -EIO;
3373}
3374
3375static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3376{
3377        __be32 *p;
3378
3379        *res = 0;
3380        if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3381                return -EIO;
3382        if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3383                p = xdr_inline_decode(xdr, 4);
3384                if (unlikely(!p))
3385                        goto out_overflow;
3386                *res = be32_to_cpup(p);
3387                bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3388        }
3389        dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3390        return 0;
3391out_overflow:
3392        print_overflow_msg(__func__, xdr);
3393        return -EIO;
3394}
3395
3396static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3397{
3398        __be32 *p;
3399
3400        *res = 0;
3401        if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3402                return -EIO;
3403        if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3404                p = xdr_inline_decode(xdr, 4);
3405                if (unlikely(!p))
3406                        goto out_overflow;
3407                *res = be32_to_cpup(p);
3408                bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3409        }
3410        dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3411        return 0;
3412out_overflow:
3413        print_overflow_msg(__func__, xdr);
3414        return -EIO;
3415}
3416
3417static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3418{
3419        __be32 *p;
3420        int ret = 0;
3421
3422        fsid->major = 0;
3423        fsid->minor = 0;
3424        if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3425                return -EIO;
3426        if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3427                p = xdr_inline_decode(xdr, 16);
3428                if (unlikely(!p))
3429                        goto out_overflow;
3430                p = xdr_decode_hyper(p, &fsid->major);
3431                xdr_decode_hyper(p, &fsid->minor);
3432                bitmap[0] &= ~FATTR4_WORD0_FSID;
3433                ret = NFS_ATTR_FATTR_FSID;
3434        }
3435        dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3436                        (unsigned long long)fsid->major,
3437                        (unsigned long long)fsid->minor);
3438        return ret;
3439out_overflow:
3440        print_overflow_msg(__func__, xdr);
3441        return -EIO;
3442}
3443
3444static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3445{
3446        __be32 *p;
3447
3448        *res = 60;
3449        if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3450                return -EIO;
3451        if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3452                p = xdr_inline_decode(xdr, 4);
3453                if (unlikely(!p))
3454                        goto out_overflow;
3455                *res = be32_to_cpup(p);
3456                bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3457        }
3458        dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3459        return 0;
3460out_overflow:
3461        print_overflow_msg(__func__, xdr);
3462        return -EIO;
3463}
3464
3465static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3466{
3467        __be32 *p;
3468
3469        if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3470                return -EIO;
3471        if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3472                p = xdr_inline_decode(xdr, 4);
3473                if (unlikely(!p))
3474                        goto out_overflow;
3475                bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3476                *res = -be32_to_cpup(p);
3477        }
3478        return 0;
3479out_overflow:
3480        print_overflow_msg(__func__, xdr);
3481        return -EIO;
3482}
3483
3484static int decode_attr_exclcreat_supported(struct xdr_stream *xdr,
3485                                 uint32_t *bitmap, uint32_t *bitmask)
3486{
3487        if (likely(bitmap[2] & FATTR4_WORD2_SUPPATTR_EXCLCREAT)) {
3488                int ret;
3489                ret = decode_attr_bitmap(xdr, bitmask);
3490                if (unlikely(ret < 0))
3491                        return ret;
3492                bitmap[2] &= ~FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3493        } else
3494                bitmask[0] = bitmask[1] = bitmask[2] = 0;
3495        dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3496                bitmask[0], bitmask[1], bitmask[2]);
3497        return 0;
3498}
3499
3500static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3501{
3502        __be32 *p;
3503        int len;
3504
3505        if (fh != NULL)
3506                memset(fh, 0, sizeof(*fh));
3507
3508        if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3509                return -EIO;
3510        if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3511                p = xdr_inline_decode(xdr, 4);
3512                if (unlikely(!p))
3513                        goto out_overflow;
3514                len = be32_to_cpup(p);
3515                if (len > NFS4_FHSIZE)
3516                        return -EIO;
3517                p = xdr_inline_decode(xdr, len);
3518                if (unlikely(!p))
3519                        goto out_overflow;
3520                if (fh != NULL) {
3521                        memcpy(fh->data, p, len);
3522                        fh->size = len;
3523                }
3524                bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3525        }
3526        return 0;
3527out_overflow:
3528        print_overflow_msg(__func__, xdr);
3529        return -EIO;
3530}
3531
3532static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3533{
3534        __be32 *p;
3535
3536        *res = 0;
3537        if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3538                return -EIO;
3539        if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3540                p = xdr_inline_decode(xdr, 4);
3541                if (unlikely(!p))
3542                        goto out_overflow;
3543                *res = be32_to_cpup(p);
3544                bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3545        }
3546        dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3547        return 0;
3548out_overflow:
3549        print_overflow_msg(__func__, xdr);
3550        return -EIO;
3551}
3552
3553static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3554{
3555        __be32 *p;
3556        int ret = 0;
3557
3558        *fileid = 0;
3559        if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3560                return -EIO;
3561        if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3562                p = xdr_inline_decode(xdr, 8);
3563                if (unlikely(!p))
3564                        goto out_overflow;
3565                xdr_decode_hyper(p, fileid);
3566                bitmap[0] &= ~FATTR4_WORD0_FILEID;
3567                ret = NFS_ATTR_FATTR_FILEID;
3568        }
3569        dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3570        return ret;
3571out_overflow:
3572        print_overflow_msg(__func__, xdr);
3573        return -EIO;
3574}
3575
3576static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3577{
3578        __be32 *p;
3579        int ret = 0;
3580
3581        *fileid = 0;
3582        if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3583                return -EIO;
3584        if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3585                p = xdr_inline_decode(xdr, 8);
3586                if (unlikely(!p))
3587                        goto out_overflow;
3588                xdr_decode_hyper(p, fileid);
3589                bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3590                ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3591        }
3592        dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3593        return ret;
3594out_overflow:
3595        print_overflow_msg(__func__, xdr);
3596        return -EIO;
3597}
3598
3599static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3600{
3601        __be32 *p;
3602        int status = 0;
3603
3604        *res = 0;
3605        if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3606                return -EIO;
3607        if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3608                p = xdr_inline_decode(xdr, 8);
3609                if (unlikely(!p))
3610                        goto out_overflow;
3611                xdr_decode_hyper(p, res);
3612                bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3613        }
3614        dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3615        return status;
3616out_overflow:
3617        print_overflow_msg(__func__, xdr);
3618        return -EIO;
3619}
3620
3621static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3622{
3623        __be32 *p;
3624        int status = 0;
3625
3626        *res = 0;
3627        if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3628                return -EIO;
3629        if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3630                p = xdr_inline_decode(xdr, 8);
3631                if (unlikely(!p))
3632                        goto out_overflow;
3633                xdr_decode_hyper(p, res);
3634                bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3635        }
3636        dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3637        return status;
3638out_overflow:
3639        print_overflow_msg(__func__, xdr);
3640        return -EIO;
3641}
3642
3643static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3644{
3645        __be32 *p;
3646        int status = 0;
3647
3648        *res = 0;
3649        if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3650                return -EIO;
3651        if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3652                p = xdr_inline_decode(xdr, 8);
3653                if (unlikely(!p))
3654                        goto out_overflow;
3655                xdr_decode_hyper(p, res);
3656                bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3657        }
3658        dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3659        return status;
3660out_overflow:
3661        print_overflow_msg(__func__, xdr);
3662        return -EIO;
3663}
3664
3665static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3666{
3667        u32 n;
3668        __be32 *p;
3669        int status = 0;
3670
3671        p = xdr_inline_decode(xdr, 4);
3672        if (unlikely(!p))
3673                goto out_overflow;
3674        n = be32_to_cpup(p);
3675        if (n == 0)
3676                goto root_path;
3677        dprintk("pathname4: ");
3678        if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3679                dprintk("cannot parse %d components in path\n", n);
3680                goto out_eio;
3681        }
3682        for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3683                struct nfs4_string *component = &path->components[path->ncomponents];
3684                status = decode_opaque_inline(xdr, &component->len, &component->data);
3685                if (unlikely(status != 0))
3686                        goto out_eio;
3687                ifdebug (XDR)
3688                        pr_cont("%s%.*s ",
3689                                (path->ncomponents != n ? "/ " : ""),
3690                                component->len, component->data);
3691        }
3692out:
3693        return status;
3694root_path:
3695/* a root pathname is sent as a zero component4 */
3696        path->ncomponents = 1;
3697        path->components[0].len=0;
3698        path->components[0].data=NULL;
3699        dprintk("pathname4: /\n");
3700        goto out;
3701out_eio:
3702        dprintk(" status %d", status);
3703        status = -EIO;
3704        goto out;
3705out_overflow:
3706        print_overflow_msg(__func__, xdr);
3707        return -EIO;
3708}
3709
3710static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3711{
3712        int n;
3713        __be32 *p;
3714        int status = -EIO;
3715
3716        if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3717                goto out;
3718        status = 0;
3719        if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3720                goto out;
3721        bitmap[0] &= ~FATTR4_WORD0_FS_LOCATIONS;
3722        status = -EIO;
3723        /* Ignore borken servers that return unrequested attrs */
3724        if (unlikely(res == NULL))
3725                goto out;
3726        dprintk("%s: fsroot:\n", __func__);
3727        status = decode_pathname(xdr, &res->fs_path);
3728        if (unlikely(status != 0))
3729                goto out;
3730        p = xdr_inline_decode(xdr, 4);
3731        if (unlikely(!p))
3732                goto out_overflow;
3733        n = be32_to_cpup(p);
3734        if (n <= 0)
3735                goto out_eio;
3736        for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3737                u32 m;
3738                struct nfs4_fs_location *loc;
3739
3740                if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3741                        break;
3742                loc = &res->locations[res->nlocations];
3743                p = xdr_inline_decode(xdr, 4);
3744                if (unlikely(!p))
3745                        goto out_overflow;
3746                m = be32_to_cpup(p);
3747
3748                dprintk("%s: servers:\n", __func__);
3749                for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3750                        struct nfs4_string *server;
3751
3752                        if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3753                                unsigned int i;
3754                                dprintk("%s: using first %u of %u servers "
3755                                        "returned for location %u\n",
3756                                                __func__,
3757                                                NFS4_FS_LOCATION_MAXSERVERS,
3758                                                m, res->nlocations);
3759                                for (i = loc->nservers; i < m; i++) {
3760                                        unsigned int len;
3761                                        char *data;
3762                                        status = decode_opaque_inline(xdr, &len, &data);
3763                                        if (unlikely(status != 0))
3764                                                goto out_eio;
3765                                }
3766                                break;
3767                        }
3768                        server = &loc->servers[loc->nservers];
3769                        status = decode_opaque_inline(xdr, &server->len, &server->data);
3770                        if (unlikely(status != 0))
3771                                goto out_eio;
3772                        dprintk("%s ", server->data);
3773                }
3774                status = decode_pathname(xdr, &loc->rootpath);
3775                if (unlikely(status != 0))
3776                        goto out_eio;
3777        }
3778        if (res->nlocations != 0)
3779                status = NFS_ATTR_FATTR_V4_LOCATIONS;
3780out:
3781        dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3782        return status;
3783out_overflow:
3784        print_overflow_msg(__func__, xdr);
3785out_eio:
3786        status = -EIO;
3787        goto out;
3788}
3789
3790static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3791{
3792        __be32 *p;
3793        int status = 0;
3794
3795        *res = 0;
3796        if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3797                return -EIO;
3798        if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3799                p = xdr_inline_decode(xdr, 8);
3800                if (unlikely(!p))
3801                        goto out_overflow;
3802                xdr_decode_hyper(p, res);
3803                bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3804        }
3805        dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3806        return status;
3807out_overflow:
3808        print_overflow_msg(__func__, xdr);
3809        return -EIO;
3810}
3811
3812static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3813{
3814        __be32 *p;
3815        int status = 0;
3816
3817        *maxlink = 1;
3818        if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3819                return -EIO;
3820        if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3821                p = xdr_inline_decode(xdr, 4);
3822                if (unlikely(!p))
3823                        goto out_overflow;
3824                *maxlink = be32_to_cpup(p);
3825                bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3826        }
3827        dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3828        return status;
3829out_overflow:
3830        print_overflow_msg(__func__, xdr);
3831        return -EIO;
3832}
3833
3834static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3835{
3836        __be32 *p;
3837        int status = 0;
3838
3839        *maxname = 1024;
3840        if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3841                return -EIO;
3842        if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3843                p = xdr_inline_decode(xdr, 4);
3844                if (unlikely(!p))
3845                        goto out_overflow;
3846                *maxname = be32_to_cpup(p);
3847                bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3848        }
3849        dprintk("%s: maxname=%u\n", __func__, *maxname);
3850        return status;
3851out_overflow:
3852        print_overflow_msg(__func__, xdr);
3853        return -EIO;
3854}
3855
3856static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3857{
3858        __be32 *p;
3859        int status = 0;
3860
3861        *res = 1024;
3862        if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3863                return -EIO;
3864        if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3865                uint64_t maxread;
3866                p = xdr_inline_decode(xdr, 8);
3867                if (unlikely(!p))
3868                        goto out_overflow;
3869                xdr_decode_hyper(p, &maxread);
3870                if (maxread > 0x7FFFFFFF)
3871                        maxread = 0x7FFFFFFF;
3872                *res = (uint32_t)maxread;
3873                bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3874        }
3875        dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3876        return status;
3877out_overflow:
3878        print_overflow_msg(__func__, xdr);
3879        return -EIO;
3880}
3881
3882static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3883{
3884        __be32 *p;
3885        int status = 0;
3886
3887        *res = 1024;
3888        if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3889                return -EIO;
3890        if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3891                uint64_t maxwrite;
3892                p = xdr_inline_decode(xdr, 8);
3893                if (unlikely(!p))
3894                        goto out_overflow;
3895                xdr_decode_hyper(p, &maxwrite);
3896                if (maxwrite > 0x7FFFFFFF)
3897                        maxwrite = 0x7FFFFFFF;
3898                *res = (uint32_t)maxwrite;
3899                bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3900        }
3901        dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3902        return status;
3903out_overflow:
3904        print_overflow_msg(__func__, xdr);
3905        return -EIO;
3906}
3907
3908static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3909{
3910        uint32_t tmp;
3911        __be32 *p;
3912        int ret = 0;
3913
3914        *mode = 0;
3915        if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3916                return -EIO;
3917        if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3918                p = xdr_inline_decode(xdr, 4);
3919                if (unlikely(!p))
3920                        goto out_overflow;
3921                tmp = be32_to_cpup(p);
3922                *mode = tmp & ~S_IFMT;
3923                bitmap[1] &= ~FATTR4_WORD1_MODE;
3924                ret = NFS_ATTR_FATTR_MODE;
3925        }
3926        dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3927        return ret;
3928out_overflow:
3929        print_overflow_msg(__func__, xdr);
3930        return -EIO;
3931}
3932
3933static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3934{
3935        __be32 *p;
3936        int ret = 0;
3937
3938        *nlink = 1;
3939        if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3940                return -EIO;
3941        if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3942                p = xdr_inline_decode(xdr, 4);
3943                if (unlikely(!p))
3944                        goto out_overflow;
3945                *nlink = be32_to_cpup(p);
3946                bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3947                ret = NFS_ATTR_FATTR_NLINK;
3948        }
3949        dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3950        return ret;
3951out_overflow:
3952        print_overflow_msg(__func__, xdr);
3953        return -EIO;
3954}
3955
3956static ssize_t decode_nfs4_string(struct xdr_stream *xdr,
3957                struct nfs4_string *name, gfp_t gfp_flags)
3958{
3959        ssize_t ret;
3960
3961        ret = xdr_stream_decode_string_dup(xdr, &name->data,
3962                        XDR_MAX_NETOBJ, gfp_flags);
3963        name->len = 0;
3964        if (ret > 0)
3965                name->len = ret;
3966        return ret;
3967}
3968
3969static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3970                const struct nfs_server *server, kuid_t *uid,
3971                struct nfs4_string *owner_name)
3972{
3973        ssize_t len;
3974        char *p;
3975
3976        *uid = make_kuid(&init_user_ns, -2);
3977        if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3978                return -EIO;
3979        if (!(bitmap[1] & FATTR4_WORD1_OWNER))
3980                return 0;
3981        bitmap[1] &= ~FATTR4_WORD1_OWNER;
3982
3983        if (owner_name != NULL) {
3984                len = decode_nfs4_string(xdr, owner_name, GFP_NOWAIT);
3985                if (len <= 0)
3986                        goto out;
3987                dprintk("%s: name=%s\n", __func__, owner_name->data);
3988                return NFS_ATTR_FATTR_OWNER_NAME;
3989        } else {
3990                len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
3991                                XDR_MAX_NETOBJ);
3992                if (len <= 0 || nfs_map_name_to_uid(server, p, len, uid) != 0)
3993                        goto out;
3994                dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3995                return NFS_ATTR_FATTR_OWNER;
3996        }
3997out:
3998        if (len != -EBADMSG)
3999                return 0;
4000        print_overflow_msg(__func__, xdr);

4001        return -EIO;
4002}
4003
4004static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
4005                const struct nfs_server *server, kgid_t *gid,
4006                struct nfs4_string *group_name)
4007{
4008        ssize_t len;
4009        char *p;
4010
4011        *gid = make_kgid(&init_user_ns, -2);
4012        if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
4013                return -EIO;
4014        if (!(bitmap[1] & FATTR4_WORD1_OWNER_GROUP))
4015                return 0;
4016        bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
4017
4018        if (group_name != NULL) {
4019                len = decode_nfs4_string(xdr, group_name, GFP_NOWAIT);
4020                if (len <= 0)
4021                        goto out;
4022                dprintk("%s: name=%s\n", __func__, group_name->data);
4023                return NFS_ATTR_FATTR_GROUP_NAME;
4024        } else {
4025                len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
4026                                XDR_MAX_NETOBJ);
4027                if (len <= 0 || nfs_map_group_to_gid(server, p, len, gid) != 0)
4028                        goto out;
4029                dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
4030                return NFS_ATTR_FATTR_GROUP;
4031        }
4032out:
4033        if (len != -EBADMSG)
4034                return 0;
4035        print_overflow_msg(__func__, xdr);
4036        return -EIO;
4037}
4038
4039static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
4040{
4041        uint32_t major = 0, minor = 0;
4042        __be32 *p;
4043        int ret = 0;
4044
4045        *rdev = MKDEV(0,0);
4046        if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
4047                return -EIO;
4048        if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
4049                dev_t tmp;
4050
4051                p = xdr_inline_decode(xdr, 8);
4052                if (unlikely(!p))
4053                        goto out_overflow;
4054                major = be32_to_cpup(p++);
4055                minor = be32_to_cpup(p);
4056                tmp = MKDEV(major, minor);
4057                if (MAJOR(tmp) == major && MINOR(tmp) == minor)
4058                        *rdev = tmp;
4059                bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
4060                ret = NFS_ATTR_FATTR_RDEV;
4061        }
4062        dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
4063        return ret;
4064out_overflow:
4065        print_overflow_msg(__func__, xdr);
4066        return -EIO;
4067}
4068
4069static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4070{
4071        __be32 *p;
4072        int status = 0;
4073
4074        *res = 0;
4075        if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
4076                return -EIO;
4077        if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
4078                p = xdr_inline_decode(xdr, 8);
4079                if (unlikely(!p))
4080                        goto out_overflow;
4081                xdr_decode_hyper(p, res);
4082                bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
4083        }
4084        dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
4085        return status;
4086out_overflow:
4087        print_overflow_msg(__func__, xdr);
4088        return -EIO;
4089}
4090
4091static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4092{
4093        __be32 *p;
4094        int status = 0;
4095
4096        *res = 0;
4097        if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
4098                return -EIO;
4099        if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
4100                p = xdr_inline_decode(xdr, 8);
4101                if (unlikely(!p))
4102                        goto out_overflow;
4103                xdr_decode_hyper(p, res);
4104                bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
4105        }
4106        dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
4107        return status;
4108out_overflow:
4109        print_overflow_msg(__func__, xdr);
4110        return -EIO;
4111}
4112
4113static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4114{
4115        __be32 *p;
4116        int status = 0;
4117
4118        *res = 0;
4119        if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
4120                return -EIO;
4121        if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
4122                p = xdr_inline_decode(xdr, 8);
4123                if (unlikely(!p))
4124                        goto out_overflow;
4125                xdr_decode_hyper(p, res);
4126                bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
4127        }
4128        dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4129        return status;
4130out_overflow:
4131        print_overflow_msg(__func__, xdr);
4132        return -EIO;
4133}
4134
4135static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4136{
4137        __be32 *p;
4138        int ret = 0;
4139
4140        *used = 0;
4141        if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4142                return -EIO;
4143        if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4144                p = xdr_inline_decode(xdr, 8);
4145                if (unlikely(!p))
4146                        goto out_overflow;
4147                xdr_decode_hyper(p, used);
4148                bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4149                ret = NFS_ATTR_FATTR_SPACE_USED;
4150        }
4151        dprintk("%s: space used=%Lu\n", __func__,
4152                        (unsigned long long)*used);
4153        return ret;
4154out_overflow:
4155        print_overflow_msg(__func__, xdr);
4156        return -EIO;
4157}
4158
4159static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
4160{
4161        __be32 *p;
4162        uint64_t sec;
4163        uint32_t nsec;
4164
4165        p = xdr_inline_decode(xdr, 12);
4166        if (unlikely(!p))
4167                goto out_overflow;
4168        p = xdr_decode_hyper(p, &sec);
4169        nsec = be32_to_cpup(p);
4170        time->tv_sec = (time_t)sec;
4171        time->tv_nsec = (long)nsec;
4172        return 0;
4173out_overflow:
4174        print_overflow_msg(__func__, xdr);
4175        return -EIO;
4176}
4177
4178static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4179{
4180        int status = 0;
4181
4182        time->tv_sec = 0;
4183        time->tv_nsec = 0;
4184        if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4185                return -EIO;
4186        if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4187                status = decode_attr_time(xdr, time);
4188                if (status == 0)
4189                        status = NFS_ATTR_FATTR_ATIME;
4190                bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4191        }
4192        dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4193        return status;
4194}
4195
4196static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4197{
4198        int status = 0;
4199
4200        time->tv_sec = 0;
4201        time->tv_nsec = 0;
4202        if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4203                return -EIO;
4204        if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4205                status = decode_attr_time(xdr, time);
4206                if (status == 0)
4207                        status = NFS_ATTR_FATTR_CTIME;
4208                bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4209        }
4210        dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4211        return status;
4212}
4213
4214static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4215                                  struct timespec *time)
4216{
4217        int status = 0;
4218
4219        time->tv_sec = 0;
4220        time->tv_nsec = 0;
4221        if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4222                return -EIO;
4223        if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4224                status = decode_attr_time(xdr, time);
4225                bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4226        }
4227        dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4228                (long)time->tv_nsec);
4229        return status;
4230}
4231
4232static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4233                                        struct nfs4_label *label)
4234{
4235        uint32_t pi = 0;
4236        uint32_t lfs = 0;
4237        __u32 len;
4238        __be32 *p;
4239        int status = 0;
4240
4241        if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4242                return -EIO;
4243        if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4244                p = xdr_inline_decode(xdr, 4);
4245                if (unlikely(!p))
4246                        goto out_overflow;
4247                lfs = be32_to_cpup(p++);
4248                p = xdr_inline_decode(xdr, 4);
4249                if (unlikely(!p))
4250                        goto out_overflow;
4251                pi = be32_to_cpup(p++);
4252                p = xdr_inline_decode(xdr, 4);
4253                if (unlikely(!p))
4254                        goto out_overflow;
4255                len = be32_to_cpup(p++);
4256                p = xdr_inline_decode(xdr, len);
4257                if (unlikely(!p))
4258                        goto out_overflow;
4259                if (len < NFS4_MAXLABELLEN) {
4260                        if (label) {
4261                                memcpy(label->label, p, len);
4262                                label->len = len;
4263                                label->pi = pi;
4264                                label->lfs = lfs;
4265                                status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4266                        }
4267                        bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4268                } else
4269                        printk(KERN_WARNING "%s: label too long (%u)!\n",
4270                                        __func__, len);
4271        }
4272        if (label && label->label)
4273                dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4274                        (char *)label->label, label->len, label->pi, label->lfs);
4275        return status;
4276
4277out_overflow:
4278        print_overflow_msg(__func__, xdr);
4279        return -EIO;
4280}
4281
4282static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4283{
4284        int status = 0;
4285
4286        time->tv_sec = 0;
4287        time->tv_nsec = 0;
4288        if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4289                return -EIO;
4290        if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4291                status = decode_attr_time(xdr, time);
4292                if (status == 0)
4293                        status = NFS_ATTR_FATTR_MTIME;
4294                bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4295        }
4296        dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4297        return status;
4298}
4299
4300static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4301{
4302        unsigned int attrwords = XDR_QUADLEN(attrlen);
4303        unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4304
4305        if (unlikely(attrwords != nwords)) {
4306                dprintk("%s: server returned incorrect attribute length: "
4307                        "%u %c %u\n",
4308                                __func__,
4309                                attrwords << 2,
4310                                (attrwords < nwords) ? '<' : '>',
4311                                nwords << 2);
4312                return -EIO;
4313        }
4314        return 0;
4315}
4316
4317static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4318{
4319        __be32 *p;
4320
4321        p = xdr_inline_decode(xdr, 20);
4322        if (unlikely(!p))
4323                goto out_overflow;
4324        cinfo->atomic = be32_to_cpup(p++);
4325        p = xdr_decode_hyper(p, &cinfo->before);
4326        xdr_decode_hyper(p, &cinfo->after);
4327        return 0;
4328out_overflow:
4329        print_overflow_msg(__func__, xdr);
4330        return -EIO;
4331}
4332
4333static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4334{
4335        __be32 *p;
4336        uint32_t supp, acc;
4337        int status;
4338
4339        status = decode_op_hdr(xdr, OP_ACCESS);
4340        if (status)
4341                return status;
4342        p = xdr_inline_decode(xdr, 8);
4343        if (unlikely(!p))
4344                goto out_overflow;
4345        supp = be32_to_cpup(p++);
4346        acc = be32_to_cpup(p);
4347        *supported = supp;
4348        *access = acc;
4349        return 0;
4350out_overflow:
4351        print_overflow_msg(__func__, xdr);
4352        return -EIO;
4353}
4354
4355static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4356{
4357        ssize_t ret = xdr_stream_decode_opaque_fixed(xdr, buf, len);
4358        if (unlikely(ret < 0)) {
4359                print_overflow_msg(__func__, xdr);
4360                return -EIO;
4361        }
4362        return 0;
4363}
4364
4365static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4366{
4367        return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4368}
4369
4370static int decode_open_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4371{
4372        stateid->type = NFS4_OPEN_STATEID_TYPE;
4373        return decode_stateid(xdr, stateid);
4374}
4375
4376static int decode_lock_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4377{
4378        stateid->type = NFS4_LOCK_STATEID_TYPE;
4379        return decode_stateid(xdr, stateid);
4380}
4381
4382static int decode_delegation_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4383{
4384        stateid->type = NFS4_DELEGATION_STATEID_TYPE;
4385        return decode_stateid(xdr, stateid);
4386}
4387
4388static int decode_invalid_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4389{
4390        nfs4_stateid dummy;
4391
4392        nfs4_stateid_copy(stateid, &invalid_stateid);
4393        return decode_stateid(xdr, &dummy);
4394}
4395
4396static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4397{
4398        int status;
4399
4400        status = decode_op_hdr(xdr, OP_CLOSE);
4401        if (status != -EIO)
4402                nfs_increment_open_seqid(status, res->seqid);
4403        if (!status)
4404                status = decode_invalid_stateid(xdr, &res->stateid);
4405        return status;
4406}
4407
4408static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4409{
4410        return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4411}
4412
4413static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4414{
4415        return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4416}
4417
4418static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4419{
4420        int status;
4421
4422        status = decode_op_hdr(xdr, OP_COMMIT);
4423        if (!status)
4424                status = decode_write_verifier(xdr, &res->verf->verifier);
4425        return status;
4426}
4427
4428static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4429{
4430        __be32 *p;
4431        uint32_t bmlen;
4432        int status;
4433
4434        status = decode_op_hdr(xdr, OP_CREATE);
4435        if (status)
4436                return status;
4437        if ((status = decode_change_info(xdr, cinfo)))
4438                return status;
4439        p = xdr_inline_decode(xdr, 4);
4440        if (unlikely(!p))
4441                goto out_overflow;
4442        bmlen = be32_to_cpup(p);
4443        p = xdr_inline_decode(xdr, bmlen << 2);
4444        if (likely(p))
4445                return 0;
4446out_overflow:
4447        print_overflow_msg(__func__, xdr);
4448        return -EIO;
4449}
4450
4451static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4452{
4453        unsigned int savep;
4454        uint32_t attrlen, bitmap[3] = {0};
4455        int status;
4456
4457        if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4458                goto xdr_error;
4459        if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4460                goto xdr_error;
4461        if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4462                goto xdr_error;
4463        if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4464                goto xdr_error;
4465        if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4466                                                 &res->fh_expire_type)) != 0)
4467                goto xdr_error;
4468        if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4469                goto xdr_error;
4470        if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4471                goto xdr_error;
4472        if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4473                goto xdr_error;
4474        if ((status = decode_attr_exclcreat_supported(xdr, bitmap,
4475                                res->exclcreat_bitmask)) != 0)
4476                goto xdr_error;
4477        status = verify_attr_len(xdr, savep, attrlen);
4478xdr_error:
4479        dprintk("%s: xdr returned %d!\n", __func__, -status);
4480        return status;
4481}
4482
4483static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4484{
4485        unsigned int savep;
4486        uint32_t attrlen, bitmap[3] = {0};
4487        int status;
4488
4489        if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4490                goto xdr_error;
4491        if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4492                goto xdr_error;
4493        if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4494                goto xdr_error;
4495
4496        if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4497                goto xdr_error;
4498        if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4499                goto xdr_error;
4500        if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4501                goto xdr_error;
4502
4503        status = -EIO;
4504        if (unlikely(bitmap[0]))
4505                goto xdr_error;
4506
4507        if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4508                goto xdr_error;
4509        if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4510                goto xdr_error;
4511        if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4512                goto xdr_error;
4513
4514        status = verify_attr_len(xdr, savep, attrlen);
4515xdr_error:
4516        dprintk("%s: xdr returned %d!\n", __func__, -status);
4517        return status;
4518}
4519
4520static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4521{
4522        unsigned int savep;
4523        uint32_t attrlen, bitmap[3] = {0};
4524        int status;
4525
4526        if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4527                goto xdr_error;
4528        if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4529                goto xdr_error;
4530        if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4531                goto xdr_error;
4532
4533        if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4534                goto xdr_error;
4535        if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4536                goto xdr_error;
4537
4538        status = verify_attr_len(xdr, savep, attrlen);
4539xdr_error:
4540        dprintk("%s: xdr returned %d!\n", __func__, -status);
4541        return status;
4542}
4543
4544static int decode_threshold_hint(struct xdr_stream *xdr,
4545                                  uint32_t *bitmap,
4546                                  uint64_t *res,
4547                                  uint32_t hint_bit)
4548{
4549        __be32 *p;
4550
4551        *res = 0;
4552        if (likely(bitmap[0] & hint_bit)) {
4553                p = xdr_inline_decode(xdr, 8);
4554                if (unlikely(!p))
4555                        goto out_overflow;
4556                xdr_decode_hyper(p, res);
4557        }
4558        return 0;
4559out_overflow:
4560        print_overflow_msg(__func__, xdr);
4561        return -EIO;
4562}
4563
4564static int decode_first_threshold_item4(struct xdr_stream *xdr,
4565                                        struct nfs4_threshold *res)
4566{
4567        __be32 *p;
4568        unsigned int savep;
4569        uint32_t bitmap[3] = {0,}, attrlen;
4570        int status;
4571
4572        /* layout type */
4573        p = xdr_inline_decode(xdr, 4);
4574        if (unlikely(!p)) {
4575                print_overflow_msg(__func__, xdr);
4576                return -EIO;
4577        }
4578        res->l_type = be32_to_cpup(p);
4579
4580        /* thi_hintset bitmap */
4581        status = decode_attr_bitmap(xdr, bitmap);
4582        if (status < 0)
4583                goto xdr_error;
4584
4585        /* thi_hintlist length */
4586        status = decode_attr_length(xdr, &attrlen, &savep);
4587        if (status < 0)
4588                goto xdr_error;
4589        /* thi_hintlist */
4590        status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4591        if (status < 0)
4592                goto xdr_error;
4593        status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4594        if (status < 0)
4595                goto xdr_error;
4596        status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4597                                       THRESHOLD_RD_IO);
4598        if (status < 0)
4599                goto xdr_error;
4600        status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4601                                       THRESHOLD_WR_IO);
4602        if (status < 0)
4603                goto xdr_error;
4604
4605        status = verify_attr_len(xdr, savep, attrlen);
4606        res->bm = bitmap[0];
4607
4608        dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4609                 __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4610                res->wr_io_sz);
4611xdr_error:
4612        dprintk("%s ret=%d!\n", __func__, status);
4613        return status;
4614}
4615
4616/*
4617 * Thresholds on pNFS direct I/O vrs MDS I/O
4618 */
4619static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4620                                    uint32_t *bitmap,
4621                                    struct nfs4_threshold *res)
4622{
4623        __be32 *p;
4624        int status = 0;
4625        uint32_t num;
4626
4627        if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4628                return -EIO;
4629        if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4630                /* Did the server return an unrequested attribute? */
4631                if (unlikely(res == NULL))
4632                        return -EREMOTEIO;
4633                p = xdr_inline_decode(xdr, 4);
4634                if (unlikely(!p))
4635                        goto out_overflow;
4636                num = be32_to_cpup(p);
4637                if (num == 0)
4638                        return 0;
4639                if (num > 1)
4640                        printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4641                                "drivers per filesystem not supported\n",
4642                                __func__);
4643
4644                status = decode_first_threshold_item4(xdr, res);
4645                bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4646        }
4647        return status;
4648out_overflow:
4649        print_overflow_msg(__func__, xdr);
4650        return -EIO;
4651}
4652
4653static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4654                struct nfs_fattr *fattr, struct nfs_fh *fh,
4655                struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4656                const struct nfs_server *server)
4657{
4658        int status;
4659        umode_t fmode = 0;
4660        uint32_t type;
4661        int32_t err;
4662
4663        status = decode_attr_type(xdr, bitmap, &type);
4664        if (status < 0)
4665                goto xdr_error;
4666        fattr->mode = 0;
4667        if (status != 0) {
4668                fattr->mode |= nfs_type2fmt[type];
4669                fattr->valid |= status;
4670        }
4671
4672        status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4673        if (status < 0)
4674                goto xdr_error;
4675        fattr->valid |= status;
4676
4677        status = decode_attr_size(xdr, bitmap, &fattr->size);
4678        if (status < 0)
4679                goto xdr_error;
4680        fattr->valid |= status;
4681
4682        status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4683        if (status < 0)
4684                goto xdr_error;
4685        fattr->valid |= status;
4686
4687        err = 0;
4688        status = decode_attr_error(xdr, bitmap, &err);
4689        if (status < 0)
4690                goto xdr_error;
4691
4692        status = decode_attr_filehandle(xdr, bitmap, fh);
4693        if (status < 0)
4694                goto xdr_error;
4695
4696        status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4697        if (status < 0)
4698                goto xdr_error;
4699        fattr->valid |= status;
4700
4701        status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4702        if (status < 0)
4703                goto xdr_error;
4704        fattr->valid |= status;
4705
4706        status = -EIO;
4707        if (unlikely(bitmap[0]))
4708                goto xdr_error;
4709
4710        status = decode_attr_mode(xdr, bitmap, &fmode);
4711        if (status < 0)
4712                goto xdr_error;
4713        if (status != 0) {
4714                fattr->mode |= fmode;
4715                fattr->valid |= status;
4716        }
4717
4718        status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4719        if (status < 0)
4720                goto xdr_error;
4721        fattr->valid |= status;
4722
4723        status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4724        if (status < 0)
4725                goto xdr_error;
4726        fattr->valid |= status;
4727
4728        status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4729        if (status < 0)
4730                goto xdr_error;
4731        fattr->valid |= status;
4732
4733        status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4734        if (status < 0)
4735                goto xdr_error;
4736        fattr->valid |= status;
4737
4738        status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4739        if (status < 0)
4740                goto xdr_error;
4741        fattr->valid |= status;
4742
4743        status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4744        if (status < 0)
4745                goto xdr_error;
4746        fattr->valid |= status;
4747
4748        status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4749        if (status < 0)
4750                goto xdr_error;
4751        fattr->valid |= status;
4752
4753        status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4754        if (status < 0)
4755                goto xdr_error;
4756        fattr->valid |= status;
4757
4758        status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4759        if (status < 0)
4760                goto xdr_error;
4761        fattr->valid |= status;
4762
4763        status = -EIO;
4764        if (unlikely(bitmap[1]))
4765                goto xdr_error;
4766
4767        status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4768        if (status < 0)
4769                goto xdr_error;
4770
4771        if (label) {
4772                status = decode_attr_security_label(xdr, bitmap, label);
4773                if (status < 0)
4774                        goto xdr_error;
4775                fattr->valid |= status;
4776        }
4777
4778xdr_error:
4779        dprintk("%s: xdr returned %d\n", __func__, -status);
4780        return status;
4781}
4782
4783static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4784                struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4785                struct nfs4_label *label, const struct nfs_server *server)
4786{
4787        unsigned int savep;
4788        uint32_t attrlen,
4789                 bitmap[3] = {0};
4790        int status;
4791
4792        status = decode_op_hdr(xdr, OP_GETATTR);
4793        if (status < 0)
4794                goto xdr_error;
4795
4796        status = decode_attr_bitmap(xdr, bitmap);
4797        if (status < 0)
4798                goto xdr_error;
4799
4800        status = decode_attr_length(xdr, &attrlen, &savep);
4801        if (status < 0)
4802                goto xdr_error;
4803
4804        status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4805                                        label, server);
4806        if (status < 0)
4807                goto xdr_error;
4808
4809        status = verify_attr_len(xdr, savep, attrlen);
4810xdr_error:
4811        dprintk("%s: xdr returned %d\n", __func__, -status);
4812        return status;
4813}
4814
4815static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4816                struct nfs4_label *label, const struct nfs_server *server)
4817{
4818        return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4819}
4820
4821static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4822                const struct nfs_server *server)
4823{
4824        return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4825}
4826
4827/*
4828 * Decode potentially multiple layout types.
4829 */
4830static int decode_pnfs_layout_types(struct xdr_stream *xdr,
4831                                    struct nfs_fsinfo *fsinfo)
4832{
4833        __be32 *p;
4834        uint32_t i;
4835
4836        p = xdr_inline_decode(xdr, 4);
4837        if (unlikely(!p))
4838                goto out_overflow;
4839        fsinfo->nlayouttypes = be32_to_cpup(p);
4840
4841        /* pNFS is not supported by the underlying file system */
4842        if (fsinfo->nlayouttypes == 0)
4843                return 0;
4844
4845        /* Decode and set first layout type, move xdr->p past unused types */
4846        p = xdr_inline_decode(xdr, fsinfo->nlayouttypes * 4);
4847        if (unlikely(!p))
4848                goto out_overflow;
4849
4850        /* If we get too many, then just cap it at the max */
4851        if (fsinfo->nlayouttypes > NFS_MAX_LAYOUT_TYPES) {
4852                printk(KERN_INFO "NFS: %s: Warning: Too many (%u) pNFS layout types\n",
4853                        __func__, fsinfo->nlayouttypes);
4854                fsinfo->nlayouttypes = NFS_MAX_LAYOUT_TYPES;
4855        }
4856
4857        for(i = 0; i < fsinfo->nlayouttypes; ++i)
4858                fsinfo->layouttype[i] = be32_to_cpup(p++);
4859        return 0;
4860out_overflow:
4861        print_overflow_msg(__func__, xdr);
4862        return -EIO;
4863}
4864
4865/*
4866 * The type of file system exported.
4867 * Note we must ensure that layouttype is set in any non-error case.
4868 */
4869static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4870                                struct nfs_fsinfo *fsinfo)
4871{
4872        int status = 0;
4873
4874        dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4875        if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4876                return -EIO;
4877        if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4878                status = decode_pnfs_layout_types(xdr, fsinfo);
4879                bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4880        }
4881        return status;
4882}
4883
4884/*
4885 * The prefered block size for layout directed io
4886 */
4887static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4888                                      uint32_t *res)
4889{
4890        __be32 *p;
4891
4892        dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4893        *res = 0;
4894        if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4895                p = xdr_inline_decode(xdr, 4);
4896                if (unlikely(!p)) {
4897                        print_overflow_msg(__func__, xdr);
4898                        return -EIO;
4899                }
4900                *res = be32_to_cpup(p);
4901                bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4902        }
4903        return 0;
4904}
4905
4906/*
4907 * The granularity of a CLONE operation.
4908 */
4909static int decode_attr_clone_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4910                                     uint32_t *res)
4911{
4912        __be32 *p;
4913
4914        dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4915        *res = 0;
4916        if (bitmap[2] & FATTR4_WORD2_CLONE_BLKSIZE) {
4917                p = xdr_inline_decode(xdr, 4);
4918                if (unlikely(!p)) {
4919                        print_overflow_msg(__func__, xdr);
4920                        return -EIO;
4921                }
4922                *res = be32_to_cpup(p);
4923                bitmap[2] &= ~FATTR4_WORD2_CLONE_BLKSIZE;
4924        }
4925        return 0;
4926}
4927
4928static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4929{
4930        unsigned int savep;
4931        uint32_t attrlen, bitmap[3];
4932        int status;
4933
4934        if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4935                goto xdr_error;
4936        if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4937                goto xdr_error;
4938        if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4939                goto xdr_error;
4940
4941        fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4942
4943        if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4944                goto xdr_error;
4945        if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4946                goto xdr_error;
4947        if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4948                goto xdr_error;
4949        fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4950        if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4951                goto xdr_error;
4952        fsinfo->wtpref = fsinfo->wtmax;
4953
4954        status = -EIO;
4955        if (unlikely(bitmap[0]))
4956                goto xdr_error;
4957
4958        status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4959        if (status != 0)
4960                goto xdr_error;
4961        status = decode_attr_pnfstype(xdr, bitmap, fsinfo);
4962        if (status != 0)
4963                goto xdr_error;
4964
4965        status = -EIO;
4966        if (unlikely(bitmap[1]))
4967                goto xdr_error;
4968
4969        status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4970        if (status)
4971                goto xdr_error;
4972        status = decode_attr_clone_blksize(xdr, bitmap, &fsinfo->clone_blksize);
4973        if (status)
4974                goto xdr_error;
4975
4976        status = verify_attr_len(xdr, savep, attrlen);
4977xdr_error:
4978        dprintk("%s: xdr returned %d!\n", __func__, -status);
4979        return status;
4980}
4981
4982static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4983{
4984        __be32 *p;
4985        uint32_t len;
4986        int status;
4987
4988        /* Zero handle first to allow comparisons */
4989        memset(fh, 0, sizeof(*fh));
4990
4991        status = decode_op_hdr(xdr, OP_GETFH);
4992        if (status)
4993                return status;
4994
4995        p = xdr_inline_decode(xdr, 4);
4996        if (unlikely(!p))
4997                goto out_overflow;
4998        len = be32_to_cpup(p);
4999        if (len > NFS4_FHSIZE)
5000                return -EIO;

5001        fh->size = len;
5002        p = xdr_inline_decode(xdr, len);
5003        if (unlikely(!p))
5004                goto out_overflow;
5005        memcpy(fh->data, p, len);
5006        return 0;
5007out_overflow:
5008        print_overflow_msg(__func__, xdr);
5009        return -EIO;
5010}
5011
5012static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5013{
5014        int status;
5015
5016        status = decode_op_hdr(xdr, OP_LINK);
5017        if (status)
5018                return status;
5019        return decode_change_info(xdr, cinfo);
5020}
5021
5022/*
5023 * We create the owner, so we know a proper owner.id length is 4.
5024 */
5025static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
5026{
5027        uint64_t offset, length, clientid;
5028        __be32 *p;
5029        uint32_t namelen, type;
5030
5031        p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
5032        if (unlikely(!p))
5033                goto out_overflow;
5034        p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
5035        p = xdr_decode_hyper(p, &length);
5036        type = be32_to_cpup(p++); /* 4 byte read */
5037        if (fl != NULL) { /* manipulate file lock */
5038                fl->fl_start = (loff_t)offset;
5039                fl->fl_end = fl->fl_start + (loff_t)length - 1;
5040                if (length == ~(uint64_t)0)
5041                        fl->fl_end = OFFSET_MAX;
5042                fl->fl_type = F_WRLCK;
5043                if (type & 1)
5044                        fl->fl_type = F_RDLCK;
5045                fl->fl_pid = 0;
5046        }
5047        p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
5048        namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
5049        p = xdr_inline_decode(xdr, namelen); /* variable size field */
5050        if (likely(p))
5051                return -NFS4ERR_DENIED;
5052out_overflow:
5053        print_overflow_msg(__func__, xdr);
5054        return -EIO;
5055}
5056
5057static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
5058{
5059        int status;
5060
5061        status = decode_op_hdr(xdr, OP_LOCK);
5062        if (status == -EIO)
5063                goto out;
5064        if (status == 0) {
5065                status = decode_lock_stateid(xdr, &res->stateid);
5066                if (unlikely(status))
5067                        goto out;
5068        } else if (status == -NFS4ERR_DENIED)
5069                status = decode_lock_denied(xdr, NULL);
5070        if (res->open_seqid != NULL)
5071                nfs_increment_open_seqid(status, res->open_seqid);
5072        nfs_increment_lock_seqid(status, res->lock_seqid);
5073out:
5074        return status;
5075}
5076
5077static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
5078{
5079        int status;
5080        status = decode_op_hdr(xdr, OP_LOCKT);
5081        if (status == -NFS4ERR_DENIED)
5082                return decode_lock_denied(xdr, res->denied);
5083        return status;
5084}
5085
5086static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
5087{
5088        int status;
5089
5090        status = decode_op_hdr(xdr, OP_LOCKU);
5091        if (status != -EIO)
5092                nfs_increment_lock_seqid(status, res->seqid);
5093        if (status == 0)
5094                status = decode_lock_stateid(xdr, &res->stateid);
5095        return status;
5096}
5097
5098static int decode_release_lockowner(struct xdr_stream *xdr)
5099{
5100        return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
5101}
5102
5103static int decode_lookup(struct xdr_stream *xdr)
5104{
5105        return decode_op_hdr(xdr, OP_LOOKUP);
5106}
5107
5108static int decode_lookupp(struct xdr_stream *xdr)
5109{
5110        return decode_op_hdr(xdr, OP_LOOKUPP);
5111}
5112
5113/* This is too sick! */
5114static int decode_space_limit(struct xdr_stream *xdr,
5115                unsigned long *pagemod_limit)
5116{
5117        __be32 *p;
5118        uint32_t limit_type, nblocks, blocksize;
5119        u64 maxsize = 0;
5120
5121        p = xdr_inline_decode(xdr, 12);
5122        if (unlikely(!p))
5123                goto out_overflow;
5124        limit_type = be32_to_cpup(p++);
5125        switch (limit_type) {
5126        case NFS4_LIMIT_SIZE:
5127                xdr_decode_hyper(p, &maxsize);
5128                break;
5129        case NFS4_LIMIT_BLOCKS:
5130                nblocks = be32_to_cpup(p++);
5131                blocksize = be32_to_cpup(p);
5132                maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
5133        }
5134        maxsize >>= PAGE_SHIFT;
5135        *pagemod_limit = min_t(u64, maxsize, ULONG_MAX);
5136        return 0;
5137out_overflow:
5138        print_overflow_msg(__func__, xdr);
5139        return -EIO;
5140}
5141
5142static int decode_rw_delegation(struct xdr_stream *xdr,
5143                uint32_t delegation_type,
5144                struct nfs_openres *res)
5145{
5146        __be32 *p;
5147        int status;
5148
5149        status = decode_delegation_stateid(xdr, &res->delegation);
5150        if (unlikely(status))
5151                return status;
5152        p = xdr_inline_decode(xdr, 4);
5153        if (unlikely(!p))
5154                goto out_overflow;
5155        res->do_recall = be32_to_cpup(p);
5156
5157        switch (delegation_type) {
5158        case NFS4_OPEN_DELEGATE_READ:
5159                res->delegation_type = FMODE_READ;
5160                break;
5161        case NFS4_OPEN_DELEGATE_WRITE:
5162                res->delegation_type = FMODE_WRITE|FMODE_READ;
5163                if (decode_space_limit(xdr, &res->pagemod_limit) < 0)
5164                                return -EIO;
5165        }
5166        return decode_ace(xdr, NULL);
5167out_overflow:
5168        print_overflow_msg(__func__, xdr);
5169        return -EIO;
5170}
5171
5172static int decode_no_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5173{
5174        __be32 *p;
5175        uint32_t why_no_delegation;
5176
5177        p = xdr_inline_decode(xdr, 4);
5178        if (unlikely(!p))
5179                goto out_overflow;
5180        why_no_delegation = be32_to_cpup(p);
5181        switch (why_no_delegation) {
5182                case WND4_CONTENTION:
5183                case WND4_RESOURCE:
5184                        xdr_inline_decode(xdr, 4);
5185                        /* Ignore for now */
5186        }
5187        return 0;
5188out_overflow:
5189        print_overflow_msg(__func__, xdr);
5190        return -EIO;
5191}
5192
5193static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5194{
5195        __be32 *p;
5196        uint32_t delegation_type;
5197
5198        p = xdr_inline_decode(xdr, 4);
5199        if (unlikely(!p))
5200                goto out_overflow;
5201        delegation_type = be32_to_cpup(p);
5202        res->delegation_type = 0;
5203        switch (delegation_type) {
5204        case NFS4_OPEN_DELEGATE_NONE:
5205                return 0;
5206        case NFS4_OPEN_DELEGATE_READ:
5207        case NFS4_OPEN_DELEGATE_WRITE:
5208                return decode_rw_delegation(xdr, delegation_type, res);
5209        case NFS4_OPEN_DELEGATE_NONE_EXT:
5210                return decode_no_delegation(xdr, res);
5211        }
5212        return -EIO;
5213out_overflow:
5214        print_overflow_msg(__func__, xdr);
5215        return -EIO;
5216}
5217
5218static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
5219{
5220        __be32 *p;
5221        uint32_t savewords, bmlen, i;
5222        int status;
5223
5224        if (!__decode_op_hdr(xdr, OP_OPEN, &status))
5225                return status;
5226        nfs_increment_open_seqid(status, res->seqid);
5227        if (status)
5228                return status;
5229        status = decode_open_stateid(xdr, &res->stateid);
5230        if (unlikely(status))
5231                return status;
5232
5233        decode_change_info(xdr, &res->cinfo);
5234
5235        p = xdr_inline_decode(xdr, 8);
5236        if (unlikely(!p))
5237                goto out_overflow;
5238        res->rflags = be32_to_cpup(p++);
5239        bmlen = be32_to_cpup(p);
5240        if (bmlen > 10)
5241                goto xdr_error;
5242
5243        p = xdr_inline_decode(xdr, bmlen << 2);
5244        if (unlikely(!p))
5245                goto out_overflow;
5246        savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5247        for (i = 0; i < savewords; ++i)
5248                res->attrset[i] = be32_to_cpup(p++);
5249        for (; i < NFS4_BITMAP_SIZE; i++)
5250                res->attrset[i] = 0;
5251
5252        return decode_delegation(xdr, res);
5253xdr_error:
5254        dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5255        return -EIO;
5256out_overflow:
5257        print_overflow_msg(__func__, xdr);
5258        return -EIO;
5259}
5260
5261static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5262{
5263        int status;
5264
5265        status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5266        if (status != -EIO)
5267                nfs_increment_open_seqid(status, res->seqid);
5268        if (!status)
5269                status = decode_open_stateid(xdr, &res->stateid);
5270        return status;
5271}
5272
5273static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5274{
5275        int status;
5276
5277        status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5278        if (status != -EIO)
5279                nfs_increment_open_seqid(status, res->seqid);
5280        if (!status)
5281                status = decode_open_stateid(xdr, &res->stateid);
5282        return status;
5283}
5284
5285static int decode_putfh(struct xdr_stream *xdr)
5286{
5287        return decode_op_hdr(xdr, OP_PUTFH);
5288}
5289
5290static int decode_putrootfh(struct xdr_stream *xdr)
5291{
5292        return decode_op_hdr(xdr, OP_PUTROOTFH);
5293}
5294
5295static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5296                       struct nfs_pgio_res *res)
5297{
5298        __be32 *p;
5299        uint32_t count, eof, recvd;
5300        int status;
5301
5302        status = decode_op_hdr(xdr, OP_READ);
5303        if (status)
5304                return status;
5305        p = xdr_inline_decode(xdr, 8);
5306        if (unlikely(!p))
5307                goto out_overflow;
5308        eof = be32_to_cpup(p++);
5309        count = be32_to_cpup(p);
5310        recvd = xdr_read_pages(xdr, count);
5311        if (count > recvd) {
5312                dprintk("NFS: server cheating in read reply: "
5313                                "count %u > recvd %u\n", count, recvd);
5314                count = recvd;
5315                eof = 0;
5316        }
5317        res->eof = eof;
5318        res->count = count;
5319        return 0;
5320out_overflow:
5321        print_overflow_msg(__func__, xdr);
5322        return -EIO;
5323}
5324
5325static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5326{
5327        int             status;
5328        __be32          verf[2];
5329
5330        status = decode_op_hdr(xdr, OP_READDIR);
5331        if (!status)
5332                status = decode_verifier(xdr, readdir->verifier.data);
5333        if (unlikely(status))
5334                return status;
5335        memcpy(verf, readdir->verifier.data, sizeof(verf));
5336        dprintk("%s: verifier = %08x:%08x\n",
5337                        __func__, verf[0], verf[1]);
5338        return xdr_read_pages(xdr, xdr->buf->page_len);
5339}
5340
5341static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5342{
5343        struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5344        u32 len, recvd;
5345        __be32 *p;
5346        int status;
5347
5348        status = decode_op_hdr(xdr, OP_READLINK);
5349        if (status)
5350                return status;
5351
5352        /* Convert length of symlink */
5353        p = xdr_inline_decode(xdr, 4);
5354        if (unlikely(!p))
5355                goto out_overflow;
5356        len = be32_to_cpup(p);
5357        if (len >= rcvbuf->page_len || len <= 0) {
5358                dprintk("nfs: server returned giant symlink!\n");
5359                return -ENAMETOOLONG;
5360        }
5361        recvd = xdr_read_pages(xdr, len);
5362        if (recvd < len) {
5363                dprintk("NFS: server cheating in readlink reply: "
5364                                "count %u > recvd %u\n", len, recvd);
5365                return -EIO;
5366        }
5367        /*
5368         * The XDR encode routine has set things up so that
5369         * the link text will be copied directly into the
5370         * buffer.  We just have to do overflow-checking,
5371         * and and null-terminate the text (the VFS expects
5372         * null-termination).
5373         */
5374        xdr_terminate_string(rcvbuf, len);
5375        return 0;
5376out_overflow:
5377        print_overflow_msg(__func__, xdr);
5378        return -EIO;
5379}
5380
5381static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5382{
5383        int status;
5384
5385        status = decode_op_hdr(xdr, OP_REMOVE);
5386        if (status)
5387                goto out;
5388        status = decode_change_info(xdr, cinfo);
5389out:
5390        return status;
5391}
5392
5393static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5394              struct nfs4_change_info *new_cinfo)
5395{
5396        int status;
5397
5398        status = decode_op_hdr(xdr, OP_RENAME);
5399        if (status)
5400                goto out;
5401        if ((status = decode_change_info(xdr, old_cinfo)))
5402                goto out;
5403        status = decode_change_info(xdr, new_cinfo);
5404out:
5405        return status;
5406}
5407
5408static int decode_renew(struct xdr_stream *xdr)
5409{
5410        return decode_op_hdr(xdr, OP_RENEW);
5411}
5412
5413static int
5414decode_restorefh(struct xdr_stream *xdr)
5415{
5416        return decode_op_hdr(xdr, OP_RESTOREFH);
5417}
5418
5419static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5420                         struct nfs_getaclres *res)
5421{
5422        unsigned int savep;
5423        uint32_t attrlen,
5424                 bitmap[3] = {0};
5425        int status;
5426        unsigned int pg_offset;
5427
5428        res->acl_len = 0;
5429        if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5430                goto out;
5431
5432        xdr_enter_page(xdr, xdr->buf->page_len);
5433
5434        /* Calculate the offset of the page data */
5435        pg_offset = xdr->buf->head[0].iov_len;
5436
5437        if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5438                goto out;
5439        if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5440                goto out;
5441
5442        if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5443                return -EIO;
5444        if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5445
5446                /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5447                 * are stored with the acl data to handle the problem of
5448                 * variable length bitmaps.*/
5449                res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5450                res->acl_len = attrlen;
5451
5452                /* Check for receive buffer overflow */
5453                if (res->acl_len > (xdr->nwords << 2) ||
5454                    res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5455                        res->acl_flags |= NFS4_ACL_TRUNC;
5456                        dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5457                                        attrlen, xdr->nwords << 2);
5458                }
5459        } else
5460                status = -EOPNOTSUPP;
5461
5462out:
5463        return status;
5464}
5465
5466static int
5467decode_savefh(struct xdr_stream *xdr)
5468{
5469        return decode_op_hdr(xdr, OP_SAVEFH);
5470}
5471
5472static int decode_setattr(struct xdr_stream *xdr)
5473{
5474        __be32 *p;
5475        uint32_t bmlen;
5476        int status;
5477
5478        status = decode_op_hdr(xdr, OP_SETATTR);
5479        if (status)
5480                return status;
5481        p = xdr_inline_decode(xdr, 4);
5482        if (unlikely(!p))
5483                goto out_overflow;
5484        bmlen = be32_to_cpup(p);
5485        p = xdr_inline_decode(xdr, bmlen << 2);
5486        if (likely(p))
5487                return 0;
5488out_overflow:
5489        print_overflow_msg(__func__, xdr);
5490        return -EIO;
5491}
5492
5493static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5494{
5495        __be32 *p;
5496        uint32_t opnum;
5497        int32_t nfserr;
5498
5499        p = xdr_inline_decode(xdr, 8);
5500        if (unlikely(!p))
5501                goto out_overflow;
5502        opnum = be32_to_cpup(p++);
5503        if (opnum != OP_SETCLIENTID) {
5504                dprintk("nfs: decode_setclientid: Server returned operation"
5505                        " %d\n", opnum);
5506                return -EIO;
5507        }
5508        nfserr = be32_to_cpup(p);
5509        if (nfserr == NFS_OK) {
5510                p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5511                if (unlikely(!p))
5512                        goto out_overflow;
5513                p = xdr_decode_hyper(p, &res->clientid);
5514                memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5515        } else if (nfserr == NFSERR_CLID_INUSE) {
5516                uint32_t len;
5517
5518                /* skip netid string */
5519                p = xdr_inline_decode(xdr, 4);
5520                if (unlikely(!p))
5521                        goto out_overflow;
5522                len = be32_to_cpup(p);
5523                p = xdr_inline_decode(xdr, len);
5524                if (unlikely(!p))
5525                        goto out_overflow;
5526
5527                /* skip uaddr string */
5528                p = xdr_inline_decode(xdr, 4);
5529                if (unlikely(!p))
5530                        goto out_overflow;
5531                len = be32_to_cpup(p);
5532                p = xdr_inline_decode(xdr, len);
5533                if (unlikely(!p))
5534                        goto out_overflow;
5535                return -NFSERR_CLID_INUSE;
5536        } else
5537                return nfs4_stat_to_errno(nfserr);
5538
5539        return 0;
5540out_overflow:
5541        print_overflow_msg(__func__, xdr);
5542        return -EIO;
5543}
5544
5545static int decode_setclientid_confirm(struct xdr_stream *xdr)
5546{
5547        return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5548}
5549
5550static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5551{
5552        __be32 *p;
5553        int status;
5554
5555        status = decode_op_hdr(xdr, OP_WRITE);
5556        if (status)
5557                return status;
5558
5559        p = xdr_inline_decode(xdr, 8);
5560        if (unlikely(!p))
5561                goto out_overflow;
5562        res->count = be32_to_cpup(p++);
5563        res->verf->committed = be32_to_cpup(p++);
5564        return decode_write_verifier(xdr, &res->verf->verifier);
5565out_overflow:
5566        print_overflow_msg(__func__, xdr);
5567        return -EIO;
5568}
5569
5570static int decode_delegreturn(struct xdr_stream *xdr)
5571{
5572        return decode_op_hdr(xdr, OP_DELEGRETURN);
5573}
5574
5575static int decode_secinfo_gss(struct xdr_stream *xdr,
5576                              struct nfs4_secinfo4 *flavor)
5577{
5578        u32 oid_len;
5579        __be32 *p;
5580
5581        p = xdr_inline_decode(xdr, 4);
5582        if (unlikely(!p))
5583                goto out_overflow;
5584        oid_len = be32_to_cpup(p);
5585        if (oid_len > GSS_OID_MAX_LEN)
5586                goto out_err;
5587
5588        p = xdr_inline_decode(xdr, oid_len);
5589        if (unlikely(!p))
5590                goto out_overflow;
5591        memcpy(flavor->flavor_info.oid.data, p, oid_len);
5592        flavor->flavor_info.oid.len = oid_len;
5593
5594        p = xdr_inline_decode(xdr, 8);
5595        if (unlikely(!p))
5596                goto out_overflow;
5597        flavor->flavor_info.qop = be32_to_cpup(p++);
5598        flavor->flavor_info.service = be32_to_cpup(p);
5599
5600        return 0;
5601
5602out_overflow:
5603        print_overflow_msg(__func__, xdr);
5604        return -EIO;
5605out_err:
5606        return -EINVAL;
5607}
5608
5609static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5610{
5611        struct nfs4_secinfo4 *sec_flavor;
5612        unsigned int i, num_flavors;
5613        int status;
5614        __be32 *p;
5615
5616        p = xdr_inline_decode(xdr, 4);
5617        if (unlikely(!p))
5618                goto out_overflow;
5619
5620        res->flavors->num_flavors = 0;
5621        num_flavors = be32_to_cpup(p);
5622
5623        for (i = 0; i < num_flavors; i++) {
5624                sec_flavor = &res->flavors->flavors[i];
5625                if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5626                        break;
5627
5628                p = xdr_inline_decode(xdr, 4);
5629                if (unlikely(!p))
5630                        goto out_overflow;
5631                sec_flavor->flavor = be32_to_cpup(p);
5632
5633                if (sec_flavor->flavor == RPC_AUTH_GSS) {
5634                        status = decode_secinfo_gss(xdr, sec_flavor);
5635                        if (status)
5636                                goto out;
5637                }
5638                res->flavors->num_flavors++;
5639        }
5640
5641        status = 0;
5642out:
5643        return status;
5644out_overflow:
5645        print_overflow_msg(__func__, xdr);
5646        return -EIO;
5647}
5648
5649static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5650{
5651        int status = decode_op_hdr(xdr, OP_SECINFO);
5652        if (status)
5653                return status;
5654        return decode_secinfo_common(xdr, res);
5655}
5656
5657#if defined(CONFIG_NFS_V4_1)
5658static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5659{
5660        int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5661        if (status)
5662                return status;
5663        return decode_secinfo_common(xdr, res);
5664}
5665
5666static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5667{
5668        __be32 *p;
5669        uint32_t bitmap_words;
5670        unsigned int i;
5671
5672        p = xdr_inline_decode(xdr, 4);
5673        if (!p)
5674                return -EIO;
5675        bitmap_words = be32_to_cpup(p++);
5676        if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5677                return -EIO;
5678        p = xdr_inline_decode(xdr, 4 * bitmap_words);
5679        for (i = 0; i < bitmap_words; i++)
5680                op_map->u.words[i] = be32_to_cpup(p++);
5681
5682        return 0;
5683}
5684
5685static int decode_exchange_id(struct xdr_stream *xdr,
5686                              struct nfs41_exchange_id_res *res)
5687{
5688        __be32 *p;
5689        uint32_t dummy;
5690        char *dummy_str;
5691        int status;
5692        uint32_t impl_id_count;
5693
5694        status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5695        if (status)
5696                return status;
5697
5698        p = xdr_inline_decode(xdr, 8);
5699        if (unlikely(!p))
5700                goto out_overflow;
5701        xdr_decode_hyper(p, &res->clientid);
5702        p = xdr_inline_decode(xdr, 12);
5703        if (unlikely(!p))
5704                goto out_overflow;
5705        res->seqid = be32_to_cpup(p++);
5706        res->flags = be32_to_cpup(p++);
5707
5708        res->state_protect.how = be32_to_cpup(p);
5709        switch (res->state_protect.how) {
5710        case SP4_NONE:
5711                break;
5712        case SP4_MACH_CRED:
5713                status = decode_op_map(xdr, &res->state_protect.enforce);
5714                if (status)
5715                        return status;
5716                status = decode_op_map(xdr, &res->state_protect.allow);
5717                if (status)
5718                        return status;
5719                break;
5720        default:
5721                WARN_ON_ONCE(1);
5722                return -EIO;
5723        }
5724
5725        /* server_owner4.so_minor_id */
5726        p = xdr_inline_decode(xdr, 8);
5727        if (unlikely(!p))
5728                goto out_overflow;
5729        p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5730
5731        /* server_owner4.so_major_id */
5732        status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5733        if (unlikely(status))
5734                return status;
5735        memcpy(res->server_owner->major_id, dummy_str, dummy);
5736        res->server_owner->major_id_sz = dummy;
5737
5738        /* server_scope4 */
5739        status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5740        if (unlikely(status))
5741                return status;
5742        memcpy(res->server_scope->server_scope, dummy_str, dummy);
5743        res->server_scope->server_scope_sz = dummy;
5744
5745        /* Implementation Id */
5746        p = xdr_inline_decode(xdr, 4);
5747        if (unlikely(!p))
5748                goto out_overflow;
5749        impl_id_count = be32_to_cpup(p++);
5750
5751        if (impl_id_count) {
5752                /* nii_domain */
5753                status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5754                if (unlikely(status))
5755                        return status;
5756                memcpy(res->impl_id->domain, dummy_str, dummy);
5757
5758                /* nii_name */
5759                status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5760                if (unlikely(status))
5761                        return status;
5762                memcpy(res->impl_id->name, dummy_str, dummy);
5763
5764                /* nii_date */
5765                p = xdr_inline_decode(xdr, 12);
5766                if (unlikely(!p))
5767                        goto out_overflow;
5768                p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5769                res->impl_id->date.nseconds = be32_to_cpup(p);
5770
5771                /* if there's more than one entry, ignore the rest */
5772        }
5773        return 0;
5774out_overflow:
5775        print_overflow_msg(__func__, xdr);
5776        return -EIO;
5777}
5778
5779static int decode_chan_attrs(struct xdr_stream *xdr,
5780                             struct nfs4_channel_attrs *attrs)
5781{
5782        __be32 *p;
5783        u32 nr_attrs, val;
5784
5785        p = xdr_inline_decode(xdr, 28);
5786        if (unlikely(!p))
5787                goto out_overflow;
5788        val = be32_to_cpup(p++);        /* headerpadsz */
5789        if (val)
5790                return -EINVAL;         /* no support for header padding yet */
5791        attrs->max_rqst_sz = be32_to_cpup(p++);
5792        attrs->max_resp_sz = be32_to_cpup(p++);
5793        attrs->max_resp_sz_cached = be32_to_cpup(p++);
5794        attrs->max_ops = be32_to_cpup(p++);
5795        attrs->max_reqs = be32_to_cpup(p++);
5796        nr_attrs = be32_to_cpup(p);
5797        if (unlikely(nr_attrs > 1)) {
5798                printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5799                        "count %u\n", __func__, nr_attrs);
5800                return -EINVAL;
5801        }
5802        if (nr_attrs == 1) {
5803                p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5804                if (unlikely(!p))
5805                        goto out_overflow;
5806        }
5807        return 0;
5808out_overflow:
5809        print_overflow_msg(__func__, xdr);
5810        return -EIO;
5811}
5812
5813static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5814{
5815        return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5816}
5817
5818static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5819                                struct nfs41_bind_conn_to_session_res *res)
5820{
5821        __be32 *p;
5822        int status;
5823
5824        status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5825        if (!status)
5826                status = decode_sessionid(xdr, &res->sessionid);
5827        if (unlikely(status))
5828                return status;
5829
5830        /* dir flags, rdma mode bool */
5831        p = xdr_inline_decode(xdr, 8);
5832        if (unlikely(!p))
5833                goto out_overflow;
5834
5835        res->dir = be32_to_cpup(p++);
5836        if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5837                return -EIO;
5838        if (be32_to_cpup(p) == 0)
5839                res->use_conn_in_rdma_mode = false;
5840        else
5841                res->use_conn_in_rdma_mode = true;
5842
5843        return 0;
5844out_overflow:
5845        print_overflow_msg(__func__, xdr);
5846        return -EIO;
5847}
5848
5849static int decode_create_session(struct xdr_stream *xdr,
5850                                 struct nfs41_create_session_res *res)
5851{
5852        __be32 *p;
5853        int status;
5854
5855        status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5856        if (!status)
5857                status = decode_sessionid(xdr, &res->sessionid);
5858        if (unlikely(status))
5859                return status;
5860
5861        /* seqid, flags */
5862        p = xdr_inline_decode(xdr, 8);
5863        if (unlikely(!p))
5864                goto out_overflow;
5865        res->seqid = be32_to_cpup(p++);
5866        res->flags = be32_to_cpup(p);
5867
5868        /* Channel attributes */
5869        status = decode_chan_attrs(xdr, &res->fc_attrs);
5870        if (!status)
5871                status = decode_chan_attrs(xdr, &res->bc_attrs);
5872        return status;
5873out_overflow:
5874        print_overflow_msg(__func__, xdr);
5875        return -EIO;
5876}
5877
5878static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5879{
5880        return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5881}
5882
5883static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5884{
5885        return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5886}
5887
5888static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5889{
5890        return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5891}
5892#endif /* CONFIG_NFS_V4_1 */
5893
5894static int decode_sequence(struct xdr_stream *xdr,
5895                           struct nfs4_sequence_res *res,
5896                           struct rpc_rqst *rqstp)
5897{
5898#if defined(CONFIG_NFS_V4_1)
5899        struct nfs4_session *session;
5900        struct nfs4_sessionid id;
5901        u32 dummy;
5902        int status;
5903        __be32 *p;
5904
5905        if (res->sr_slot == NULL)
5906                return 0;
5907        if (!res->sr_slot->table->session)
5908                return 0;
5909
5910        status = decode_op_hdr(xdr, OP_SEQUENCE);
5911        if (!status)
5912                status = decode_sessionid(xdr, &id);
5913        if (unlikely(status))
5914                goto out_err;
5915
5916        /*
5917         * If the server returns different values for sessionID, slotID or
5918         * sequence number, the server is looney tunes.
5919         */
5920        status = -EREMOTEIO;
5921        session = res->sr_slot->table->session;
5922
5923        if (memcmp(id.data, session->sess_id.data,
5924                   NFS4_MAX_SESSIONID_LEN)) {
5925                dprintk("%s Invalid session id\n", __func__);
5926                goto out_err;
5927        }
5928
5929        p = xdr_inline_decode(xdr, 20);
5930        if (unlikely(!p))
5931                goto out_overflow;
5932
5933        /* seqid */
5934        dummy = be32_to_cpup(p++);
5935        if (dummy != res->sr_slot->seq_nr) {
5936                dprintk("%s Invalid sequence number\n", __func__);
5937                goto out_err;
5938        }
5939        /* slot id */
5940        dummy = be32_to_cpup(p++);
5941        if (dummy != res->sr_slot->slot_nr) {
5942                dprintk("%s Invalid slot id\n", __func__);
5943                goto out_err;
5944        }
5945        /* highest slot id */
5946        res->sr_highest_slotid = be32_to_cpup(p++);
5947        /* target highest slot id */
5948        res->sr_target_highest_slotid = be32_to_cpup(p++);
5949        /* result flags */
5950        res->sr_status_flags = be32_to_cpup(p);
5951        status = 0;
5952out_err:
5953        res->sr_status = status;
5954        return status;
5955out_overflow:
5956        print_overflow_msg(__func__, xdr);
5957        status = -EIO;
5958        goto out_err;
5959#else  /* CONFIG_NFS_V4_1 */
5960        return 0;
5961#endif /* CONFIG_NFS_V4_1 */
5962}
5963
5964#if defined(CONFIG_NFS_V4_1)
5965static int decode_layout_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
5966{
5967        stateid->type = NFS4_LAYOUT_STATEID_TYPE;
5968        return decode_stateid(xdr, stateid);
5969}
5970
5971static int decode_getdeviceinfo(struct xdr_stream *xdr,
5972                                struct nfs4_getdeviceinfo_res *res)
5973{
5974        struct pnfs_device *pdev = res->pdev;
5975        __be32 *p;
5976        uint32_t len, type;
5977        int status;
5978
5979        status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5980        if (status) {
5981                if (status == -ETOOSMALL) {
5982                        p = xdr_inline_decode(xdr, 4);
5983                        if (unlikely(!p))
5984                                goto out_overflow;
5985                        pdev->mincount = be32_to_cpup(p);
5986                        dprintk("%s: Min count too small. mincnt = %u\n",
5987                                __func__, pdev->mincount);
5988                }
5989                return status;
5990        }
5991
5992        p = xdr_inline_decode(xdr, 8);
5993        if (unlikely(!p))
5994                goto out_overflow;
5995        type = be32_to_cpup(p++);
5996        if (type != pdev->layout_type) {
5997                dprintk("%s: layout mismatch req: %u pdev: %u\n",
5998                        __func__, pdev->layout_type, type);
5999                return -EINVAL;
6000        }

6001        /*
6002         * Get the length of the opaque device_addr4. xdr_read_pages places
6003         * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
6004         * and places the remaining xdr data in xdr_buf->tail
6005         */
6006        pdev->mincount = be32_to_cpup(p);
6007        if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
6008                goto out_overflow;
6009
6010        /* Parse notification bitmap, verifying that it is zero. */
6011        p = xdr_inline_decode(xdr, 4);
6012        if (unlikely(!p))
6013                goto out_overflow;
6014        len = be32_to_cpup(p);
6015        if (len) {
6016                uint32_t i;
6017
6018                p = xdr_inline_decode(xdr, 4 * len);
6019                if (unlikely(!p))
6020                        goto out_overflow;
6021
6022                res->notification = be32_to_cpup(p++);
6023                for (i = 1; i < len; i++) {
6024                        if (be32_to_cpup(p++)) {
6025                                dprintk("%s: unsupported notification\n",
6026                                        __func__);
6027                                return -EIO;
6028                        }
6029                }
6030        }
6031        return 0;
6032out_overflow:
6033        print_overflow_msg(__func__, xdr);
6034        return -EIO;
6035}
6036
6037static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
6038                            struct nfs4_layoutget_res *res)
6039{
6040        __be32 *p;
6041        int status;
6042        u32 layout_count;
6043        u32 recvd;
6044
6045        status = decode_op_hdr(xdr, OP_LAYOUTGET);
6046        if (status)
6047                return status;
6048        p = xdr_inline_decode(xdr, 4);
6049        if (unlikely(!p))
6050                goto out_overflow;
6051        res->return_on_close = be32_to_cpup(p);
6052        decode_layout_stateid(xdr, &res->stateid);
6053        p = xdr_inline_decode(xdr, 4);
6054        if (unlikely(!p))
6055                goto out_overflow;
6056        layout_count = be32_to_cpup(p);
6057        if (!layout_count) {
6058                dprintk("%s: server responded with empty layout array\n",
6059                        __func__);
6060                return -EINVAL;
6061        }
6062
6063        p = xdr_inline_decode(xdr, 28);
6064        if (unlikely(!p))
6065                goto out_overflow;
6066        p = xdr_decode_hyper(p, &res->range.offset);
6067        p = xdr_decode_hyper(p, &res->range.length);
6068        res->range.iomode = be32_to_cpup(p++);
6069        res->type = be32_to_cpup(p++);
6070        res->layoutp->len = be32_to_cpup(p);
6071
6072        dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
6073                __func__,
6074                (unsigned long)res->range.offset,
6075                (unsigned long)res->range.length,
6076                res->range.iomode,
6077                res->type,
6078                res->layoutp->len);
6079
6080        recvd = xdr_read_pages(xdr, res->layoutp->len);
6081        if (res->layoutp->len > recvd) {
6082                dprintk("NFS: server cheating in layoutget reply: "
6083                                "layout len %u > recvd %u\n",
6084                                res->layoutp->len, recvd);
6085                return -EINVAL;
6086        }
6087
6088        if (layout_count > 1) {
6089                /* We only handle a length one array at the moment.  Any
6090                 * further entries are just ignored.  Note that this means
6091                 * the client may see a response that is less than the
6092                 * minimum it requested.
6093                 */
6094                dprintk("%s: server responded with %d layouts, dropping tail\n",
6095                        __func__, layout_count);
6096        }
6097
6098        return 0;
6099out_overflow:
6100        print_overflow_msg(__func__, xdr);
6101        return -EIO;
6102}
6103
6104static int decode_layoutreturn(struct xdr_stream *xdr,
6105                               struct nfs4_layoutreturn_res *res)
6106{
6107        __be32 *p;
6108        int status;
6109
6110        status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
6111        if (status)
6112                return status;
6113        p = xdr_inline_decode(xdr, 4);
6114        if (unlikely(!p))
6115                goto out_overflow;
6116        res->lrs_present = be32_to_cpup(p);
6117        if (res->lrs_present)
6118                status = decode_layout_stateid(xdr, &res->stateid);
6119        else
6120                nfs4_stateid_copy(&res->stateid, &invalid_stateid);
6121        return status;
6122out_overflow:
6123        print_overflow_msg(__func__, xdr);
6124        return -EIO;
6125}
6126
6127static int decode_layoutcommit(struct xdr_stream *xdr,
6128                               struct rpc_rqst *req,
6129                               struct nfs4_layoutcommit_res *res)
6130{
6131        __be32 *p;
6132        __u32 sizechanged;
6133        int status;
6134
6135        status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
6136        res->status = status;
6137        if (status)
6138                return status;
6139
6140        p = xdr_inline_decode(xdr, 4);
6141        if (unlikely(!p))
6142                goto out_overflow;
6143        sizechanged = be32_to_cpup(p);
6144
6145        if (sizechanged) {
6146                /* throw away new size */
6147                p = xdr_inline_decode(xdr, 8);
6148                if (unlikely(!p))
6149                        goto out_overflow;
6150        }
6151        return 0;
6152out_overflow:
6153        print_overflow_msg(__func__, xdr);
6154        return -EIO;
6155}
6156
6157static int decode_test_stateid(struct xdr_stream *xdr,
6158                               struct nfs41_test_stateid_res *res)
6159{
6160        __be32 *p;
6161        int status;
6162        int num_res;
6163
6164        status = decode_op_hdr(xdr, OP_TEST_STATEID);
6165        if (status)
6166                return status;
6167
6168        p = xdr_inline_decode(xdr, 4);
6169        if (unlikely(!p))
6170                goto out_overflow;
6171        num_res = be32_to_cpup(p++);
6172        if (num_res != 1)
6173                goto out;
6174
6175        p = xdr_inline_decode(xdr, 4);
6176        if (unlikely(!p))
6177                goto out_overflow;
6178        res->status = be32_to_cpup(p++);
6179
6180        return status;
6181out_overflow:
6182        print_overflow_msg(__func__, xdr);
6183out:
6184        return -EIO;
6185}
6186
6187static int decode_free_stateid(struct xdr_stream *xdr,
6188                               struct nfs41_free_stateid_res *res)
6189{
6190        res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
6191        return res->status;
6192}
6193#else
6194static inline
6195int decode_layoutreturn(struct xdr_stream *xdr,
6196                               struct nfs4_layoutreturn_res *res)
6197{
6198        return 0;
6199}
6200#endif /* CONFIG_NFS_V4_1 */
6201
6202/*
6203 * END OF "GENERIC" DECODE ROUTINES.
6204 */
6205
6206/*
6207 * Decode OPEN_DOWNGRADE response
6208 */
6209static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
6210                                       struct xdr_stream *xdr,
6211                                       void *data)
6212{
6213        struct nfs_closeres *res = data;
6214        struct compound_hdr hdr;
6215        int status;
6216
6217        status = decode_compound_hdr(xdr, &hdr);
6218        if (status)
6219                goto out;
6220        status = decode_sequence(xdr, &res->seq_res, rqstp);
6221        if (status)
6222                goto out;
6223        status = decode_putfh(xdr);
6224        if (status)
6225                goto out;
6226        if (res->lr_res) {
6227                status = decode_layoutreturn(xdr, res->lr_res);
6228                res->lr_ret = status;
6229                if (status)
6230                        goto out;
6231        }
6232        status = decode_open_downgrade(xdr, res);
6233out:
6234        return status;
6235}
6236
6237/*
6238 * Decode ACCESS response
6239 */
6240static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6241                               void *data)
6242{
6243        struct nfs4_accessres *res = data;
6244        struct compound_hdr hdr;
6245        int status;
6246
6247        status = decode_compound_hdr(xdr, &hdr);
6248        if (status)
6249                goto out;
6250        status = decode_sequence(xdr, &res->seq_res, rqstp);
6251        if (status)
6252                goto out;
6253        status = decode_putfh(xdr);
6254        if (status != 0)
6255                goto out;
6256        status = decode_access(xdr, &res->supported, &res->access);
6257        if (status != 0)
6258                goto out;
6259        decode_getfattr(xdr, res->fattr, res->server);
6260out:
6261        return status;
6262}
6263
6264/*
6265 * Decode LOOKUP response
6266 */
6267static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6268                               void *data)
6269{
6270        struct nfs4_lookup_res *res = data;
6271        struct compound_hdr hdr;
6272        int status;
6273
6274        status = decode_compound_hdr(xdr, &hdr);
6275        if (status)
6276                goto out;
6277        status = decode_sequence(xdr, &res->seq_res, rqstp);
6278        if (status)
6279                goto out;
6280        status = decode_putfh(xdr);
6281        if (status)
6282                goto out;
6283        status = decode_lookup(xdr);
6284        if (status)
6285                goto out;
6286        status = decode_getfh(xdr, res->fh);
6287        if (status)
6288                goto out;
6289        status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6290out:
6291        return status;
6292}
6293
6294/*
6295 * Decode LOOKUPP response
6296 */
6297static int nfs4_xdr_dec_lookupp(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6298                void *data)
6299{
6300        struct nfs4_lookupp_res *res = data;
6301        struct compound_hdr hdr;
6302        int status;
6303
6304        status = decode_compound_hdr(xdr, &hdr);
6305        if (status)
6306                goto out;
6307        status = decode_sequence(xdr, &res->seq_res, rqstp);
6308        if (status)
6309                goto out;
6310        status = decode_putfh(xdr);
6311        if (status)
6312                goto out;
6313        status = decode_lookupp(xdr);
6314        if (status)
6315                goto out;
6316        status = decode_getfh(xdr, res->fh);
6317        if (status)
6318                goto out;
6319        status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6320out:
6321        return status;
6322}
6323
6324/*
6325 * Decode LOOKUP_ROOT response
6326 */
6327static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6328                                    struct xdr_stream *xdr,
6329                                    void *data)
6330{
6331        struct nfs4_lookup_res *res = data;
6332        struct compound_hdr hdr;
6333        int status;
6334
6335        status = decode_compound_hdr(xdr, &hdr);
6336        if (status)
6337                goto out;
6338        status = decode_sequence(xdr, &res->seq_res, rqstp);
6339        if (status)
6340                goto out;
6341        status = decode_putrootfh(xdr);
6342        if (status)
6343                goto out;
6344        status = decode_getfh(xdr, res->fh);
6345        if (status == 0)
6346                status = decode_getfattr_label(xdr, res->fattr,
6347                                                res->label, res->server);
6348out:
6349        return status;
6350}
6351
6352/*
6353 * Decode REMOVE response
6354 */
6355static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6356                               void *data)
6357{
6358        struct nfs_removeres *res = data;
6359        struct compound_hdr hdr;
6360        int status;
6361
6362        status = decode_compound_hdr(xdr, &hdr);
6363        if (status)
6364                goto out;
6365        status = decode_sequence(xdr, &res->seq_res, rqstp);
6366        if (status)
6367                goto out;
6368        status = decode_putfh(xdr);
6369        if (status)
6370                goto out;
6371        status = decode_remove(xdr, &res->cinfo);
6372out:
6373        return status;
6374}
6375
6376/*
6377 * Decode RENAME response
6378 */
6379static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6380                               void *data)
6381{
6382        struct nfs_renameres *res = data;
6383        struct compound_hdr hdr;
6384        int status;
6385
6386        status = decode_compound_hdr(xdr, &hdr);
6387        if (status)
6388                goto out;
6389        status = decode_sequence(xdr, &res->seq_res, rqstp);
6390        if (status)
6391                goto out;
6392        status = decode_putfh(xdr);
6393        if (status)
6394                goto out;
6395        status = decode_savefh(xdr);
6396        if (status)
6397                goto out;
6398        status = decode_putfh(xdr);
6399        if (status)
6400                goto out;
6401        status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6402out:
6403        return status;
6404}
6405
6406/*
6407 * Decode LINK response
6408 */
6409static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6410                             void *data)
6411{
6412        struct nfs4_link_res *res = data;
6413        struct compound_hdr hdr;
6414        int status;
6415
6416        status = decode_compound_hdr(xdr, &hdr);
6417        if (status)
6418                goto out;
6419        status = decode_sequence(xdr, &res->seq_res, rqstp);
6420        if (status)
6421                goto out;
6422        status = decode_putfh(xdr);
6423        if (status)
6424                goto out;
6425        status = decode_savefh(xdr);
6426        if (status)
6427                goto out;
6428        status = decode_putfh(xdr);
6429        if (status)
6430                goto out;
6431        status = decode_link(xdr, &res->cinfo);
6432        if (status)
6433                goto out;
6434        /*
6435         * Note order: OP_LINK leaves the directory as the current
6436         *             filehandle.
6437         */
6438        status = decode_restorefh(xdr);
6439        if (status)
6440                goto out;
6441        decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6442out:
6443        return status;
6444}
6445
6446/*
6447 * Decode CREATE response
6448 */
6449static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6450                               void *data)
6451{
6452        struct nfs4_create_res *res = data;
6453        struct compound_hdr hdr;
6454        int status;
6455
6456        status = decode_compound_hdr(xdr, &hdr);
6457        if (status)
6458                goto out;
6459        status = decode_sequence(xdr, &res->seq_res, rqstp);
6460        if (status)
6461                goto out;
6462        status = decode_putfh(xdr);
6463        if (status)
6464                goto out;
6465        status = decode_create(xdr, &res->dir_cinfo);
6466        if (status)
6467                goto out;
6468        status = decode_getfh(xdr, res->fh);
6469        if (status)
6470                goto out;
6471        decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6472out:
6473        return status;
6474}
6475
6476/*
6477 * Decode SYMLINK response
6478 */
6479static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6480                                void *res)
6481{
6482        return nfs4_xdr_dec_create(rqstp, xdr, res);
6483}
6484
6485/*
6486 * Decode GETATTR response
6487 */
6488static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6489                                void *data)
6490{
6491        struct nfs4_getattr_res *res = data;
6492        struct compound_hdr hdr;
6493        int status;
6494
6495        status = decode_compound_hdr(xdr, &hdr);
6496        if (status)
6497                goto out;
6498        status = decode_sequence(xdr, &res->seq_res, rqstp);
6499        if (status)
6500                goto out;
6501        status = decode_putfh(xdr);
6502        if (status)
6503                goto out;
6504        status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6505out:
6506        return status;
6507}
6508
6509/*
6510 * Encode an SETACL request
6511 */
6512static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6513                                const void *data)
6514{
6515        const struct nfs_setaclargs *args = data;
6516        struct compound_hdr hdr = {
6517                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6518        };
6519
6520        encode_compound_hdr(xdr, req, &hdr);
6521        encode_sequence(xdr, &args->seq_args, &hdr);
6522        encode_putfh(xdr, args->fh, &hdr);
6523        encode_setacl(xdr, args, &hdr);
6524        encode_nops(&hdr);
6525}
6526
6527/*
6528 * Decode SETACL response
6529 */
6530static int
6531nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6532                    void *data)
6533{
6534        struct nfs_setaclres *res = data;
6535        struct compound_hdr hdr;
6536        int status;
6537
6538        status = decode_compound_hdr(xdr, &hdr);
6539        if (status)
6540                goto out;
6541        status = decode_sequence(xdr, &res->seq_res, rqstp);
6542        if (status)
6543                goto out;
6544        status = decode_putfh(xdr);
6545        if (status)
6546                goto out;
6547        status = decode_setattr(xdr);
6548out:
6549        return status;
6550}
6551
6552/*
6553 * Decode GETACL response
6554 */
6555static int
6556nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6557                    void *data)
6558{
6559        struct nfs_getaclres *res = data;
6560        struct compound_hdr hdr;
6561        int status;
6562
6563        if (res->acl_scratch != NULL) {
6564                void *p = page_address(res->acl_scratch);
6565                xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6566        }
6567        status = decode_compound_hdr(xdr, &hdr);
6568        if (status)
6569                goto out;
6570        status = decode_sequence(xdr, &res->seq_res, rqstp);
6571        if (status)
6572                goto out;
6573        status = decode_putfh(xdr);
6574        if (status)
6575                goto out;
6576        status = decode_getacl(xdr, rqstp, res);
6577
6578out:
6579        return status;
6580}
6581
6582/*
6583 * Decode CLOSE response
6584 */
6585static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6586                              void *data)
6587{
6588        struct nfs_closeres *res = data;
6589        struct compound_hdr hdr;
6590        int status;
6591
6592        status = decode_compound_hdr(xdr, &hdr);
6593        if (status)
6594                goto out;
6595        status = decode_sequence(xdr, &res->seq_res, rqstp);
6596        if (status)
6597                goto out;
6598        status = decode_putfh(xdr);
6599        if (status)
6600                goto out;
6601        if (res->lr_res) {
6602                status = decode_layoutreturn(xdr, res->lr_res);
6603                res->lr_ret = status;
6604                if (status)
6605                        goto out;
6606        }
6607        if (res->fattr != NULL) {
6608                status = decode_getfattr(xdr, res->fattr, res->server);
6609                if (status != 0)
6610                        goto out;
6611        }
6612        status = decode_close(xdr, res);
6613out:
6614        return status;
6615}
6616
6617/*
6618 * Decode OPEN response
6619 */
6620static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6621                             void *data)
6622{
6623        struct nfs_openres *res = data;
6624        struct compound_hdr hdr;
6625        int status;
6626
6627        status = decode_compound_hdr(xdr, &hdr);
6628        if (status)
6629                goto out;
6630        status = decode_sequence(xdr, &res->seq_res, rqstp);
6631        if (status)
6632                goto out;
6633        status = decode_putfh(xdr);
6634        if (status)
6635                goto out;
6636        status = decode_open(xdr, res);
6637        if (status)
6638                goto out;
6639        status = decode_getfh(xdr, &res->fh);
6640        if (status)
6641                goto out;
6642        if (res->access_request)
6643                decode_access(xdr, &res->access_supported, &res->access_result);
6644        decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6645out:
6646        return status;
6647}
6648
6649/*
6650 * Decode OPEN_CONFIRM response
6651 */
6652static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6653                                     struct xdr_stream *xdr,
6654                                     void *data)
6655{
6656        struct nfs_open_confirmres *res = data;
6657        struct compound_hdr hdr;
6658        int status;
6659
6660        status = decode_compound_hdr(xdr, &hdr);
6661        if (status)
6662                goto out;
6663        status = decode_putfh(xdr);
6664        if (status)
6665                goto out;
6666        status = decode_open_confirm(xdr, res);
6667out:
6668        return status;
6669}
6670
6671/*
6672 * Decode OPEN response
6673 */
6674static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6675                                    struct xdr_stream *xdr,
6676                                    void *data)
6677{
6678        struct nfs_openres *res = data;
6679        struct compound_hdr hdr;
6680        int status;
6681
6682        status = decode_compound_hdr(xdr, &hdr);
6683        if (status)
6684                goto out;
6685        status = decode_sequence(xdr, &res->seq_res, rqstp);
6686        if (status)
6687                goto out;
6688        status = decode_putfh(xdr);
6689        if (status)
6690                goto out;
6691        status = decode_open(xdr, res);
6692        if (status)
6693                goto out;
6694        if (res->access_request)
6695                decode_access(xdr, &res->access_supported, &res->access_result);
6696        decode_getfattr(xdr, res->f_attr, res->server);
6697out:
6698        return status;
6699}
6700
6701/*
6702 * Decode SETATTR response
6703 */
6704static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6705                                struct xdr_stream *xdr,
6706                                void *data)
6707{
6708        struct nfs_setattrres *res = data;
6709        struct compound_hdr hdr;
6710        int status;
6711
6712        status = decode_compound_hdr(xdr, &hdr);
6713        if (status)
6714                goto out;
6715        status = decode_sequence(xdr, &res->seq_res, rqstp);
6716        if (status)
6717                goto out;
6718        status = decode_putfh(xdr);
6719        if (status)
6720                goto out;
6721        status = decode_setattr(xdr);
6722        if (status)
6723                goto out;
6724        decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6725out:
6726        return status;
6727}
6728
6729/*
6730 * Decode LOCK response
6731 */
6732static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6733                             void *data)
6734{
6735        struct nfs_lock_res *res = data;
6736        struct compound_hdr hdr;
6737        int status;
6738
6739        status = decode_compound_hdr(xdr, &hdr);
6740        if (status)
6741                goto out;
6742        status = decode_sequence(xdr, &res->seq_res, rqstp);
6743        if (status)
6744                goto out;
6745        status = decode_putfh(xdr);
6746        if (status)
6747                goto out;
6748        status = decode_lock(xdr, res);
6749out:
6750        return status;
6751}
6752
6753/*
6754 * Decode LOCKT response
6755 */
6756static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6757                              void *data)
6758{
6759        struct nfs_lockt_res *res = data;
6760        struct compound_hdr hdr;
6761        int status;
6762
6763        status = decode_compound_hdr(xdr, &hdr);
6764        if (status)
6765                goto out;
6766        status = decode_sequence(xdr, &res->seq_res, rqstp);
6767        if (status)
6768                goto out;
6769        status = decode_putfh(xdr);
6770        if (status)
6771                goto out;
6772        status = decode_lockt(xdr, res);
6773out:
6774        return status;
6775}
6776
6777/*
6778 * Decode LOCKU response
6779 */
6780static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6781                              void *data)
6782{
6783        struct nfs_locku_res *res = data;
6784        struct compound_hdr hdr;
6785        int status;
6786
6787        status = decode_compound_hdr(xdr, &hdr);
6788        if (status)
6789                goto out;
6790        status = decode_sequence(xdr, &res->seq_res, rqstp);
6791        if (status)
6792                goto out;
6793        status = decode_putfh(xdr);
6794        if (status)
6795                goto out;
6796        status = decode_locku(xdr, res);
6797out:
6798        return status;
6799}
6800
6801static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6802                                          struct xdr_stream *xdr, void *dummy)
6803{
6804        struct compound_hdr hdr;
6805        int status;
6806
6807        status = decode_compound_hdr(xdr, &hdr);
6808        if (!status)
6809                status = decode_release_lockowner(xdr);
6810        return status;
6811}
6812
6813/*
6814 * Decode READLINK response
6815 */
6816static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6817                                 struct xdr_stream *xdr,
6818                                 void *data)
6819{
6820        struct nfs4_readlink_res *res = data;
6821        struct compound_hdr hdr;
6822        int status;
6823
6824        status = decode_compound_hdr(xdr, &hdr);
6825        if (status)
6826                goto out;
6827        status = decode_sequence(xdr, &res->seq_res, rqstp);
6828        if (status)
6829                goto out;
6830        status = decode_putfh(xdr);
6831        if (status)
6832                goto out;
6833        status = decode_readlink(xdr, rqstp);
6834out:
6835        return status;
6836}
6837
6838/*
6839 * Decode READDIR response
6840 */
6841static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6842                                void *data)
6843{
6844        struct nfs4_readdir_res *res = data;
6845        struct compound_hdr hdr;
6846        int status;
6847
6848        status = decode_compound_hdr(xdr, &hdr);
6849        if (status)
6850                goto out;
6851        status = decode_sequence(xdr, &res->seq_res, rqstp);
6852        if (status)
6853                goto out;
6854        status = decode_putfh(xdr);
6855        if (status)
6856                goto out;
6857        status = decode_readdir(xdr, rqstp, res);
6858out:
6859        return status;
6860}
6861
6862/*
6863 * Decode Read response
6864 */
6865static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6866                             void *data)
6867{
6868        struct nfs_pgio_res *res = data;
6869        struct compound_hdr hdr;
6870        int status;
6871
6872        status = decode_compound_hdr(xdr, &hdr);
6873        res->op_status = hdr.status;
6874        if (status)
6875                goto out;
6876        status = decode_sequence(xdr, &res->seq_res, rqstp);
6877        if (status)
6878                goto out;
6879        status = decode_putfh(xdr);
6880        if (status)
6881                goto out;
6882        status = decode_read(xdr, rqstp, res);
6883        if (!status)
6884                status = res->count;
6885out:
6886        return status;
6887}
6888
6889/*
6890 * Decode WRITE response
6891 */
6892static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6893                              void *data)
6894{
6895        struct nfs_pgio_res *res = data;
6896        struct compound_hdr hdr;
6897        int status;
6898
6899        status = decode_compound_hdr(xdr, &hdr);
6900        res->op_status = hdr.status;
6901        if (status)
6902                goto out;
6903        status = decode_sequence(xdr, &res->seq_res, rqstp);
6904        if (status)
6905                goto out;
6906        status = decode_putfh(xdr);
6907        if (status)
6908                goto out;
6909        status = decode_write(xdr, res);
6910        if (status)
6911                goto out;
6912        if (res->fattr)
6913                decode_getfattr(xdr, res->fattr, res->server);
6914        if (!status)
6915                status = res->count;
6916out:
6917        return status;
6918}
6919
6920/*
6921 * Decode COMMIT response
6922 */
6923static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6924                               void *data)
6925{
6926        struct nfs_commitres *res = data;
6927        struct compound_hdr hdr;
6928        int status;
6929
6930        status = decode_compound_hdr(xdr, &hdr);
6931        res->op_status = hdr.status;
6932        if (status)
6933                goto out;
6934        status = decode_sequence(xdr, &res->seq_res, rqstp);
6935        if (status)
6936                goto out;
6937        status = decode_putfh(xdr);
6938        if (status)
6939                goto out;
6940        status = decode_commit(xdr, res);
6941out:
6942        return status;
6943}
6944
6945/*
6946 * Decode FSINFO response
6947 */
6948static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6949                               void *data)
6950{
6951        struct nfs4_fsinfo_res *res = data;
6952        struct compound_hdr hdr;
6953        int status;
6954
6955        status = decode_compound_hdr(xdr, &hdr);
6956        if (!status)
6957                status = decode_sequence(xdr, &res->seq_res, req);
6958        if (!status)
6959                status = decode_putfh(xdr);
6960        if (!status)
6961                status = decode_fsinfo(xdr, res->fsinfo);
6962        return status;
6963}
6964
6965/*
6966 * Decode PATHCONF response
6967 */
6968static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6969                                 void *data)
6970{
6971        struct nfs4_pathconf_res *res = data;
6972        struct compound_hdr hdr;
6973        int status;
6974
6975        status = decode_compound_hdr(xdr, &hdr);
6976        if (!status)
6977                status = decode_sequence(xdr, &res->seq_res, req);
6978        if (!status)
6979                status = decode_putfh(xdr);
6980        if (!status)
6981                status = decode_pathconf(xdr, res->pathconf);
6982        return status;
6983}
6984
6985/*
6986 * Decode STATFS response
6987 */
6988static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6989                               void *data)
6990{
6991        struct nfs4_statfs_res *res = data;
6992        struct compound_hdr hdr;
6993        int status;
6994
6995        status = decode_compound_hdr(xdr, &hdr);
6996        if (!status)
6997                status = decode_sequence(xdr, &res->seq_res, req);
6998        if (!status)
6999                status = decode_putfh(xdr);
7000        if (!status)

7001                status = decode_statfs(xdr, res->fsstat);
7002        return status;
7003}
7004
7005/*
7006 * Decode GETATTR_BITMAP response
7007 */
7008static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
7009                                    struct xdr_stream *xdr,
7010                                    void *data)
7011{
7012        struct nfs4_server_caps_res *res = data;
7013        struct compound_hdr hdr;
7014        int status;
7015
7016        status = decode_compound_hdr(xdr, &hdr);
7017        if (status)
7018                goto out;
7019        status = decode_sequence(xdr, &res->seq_res, req);
7020        if (status)
7021                goto out;
7022        status = decode_putfh(xdr);
7023        if (status)
7024                goto out;
7025        status = decode_server_caps(xdr, res);
7026out:
7027        return status;
7028}
7029
7030/*
7031 * Decode RENEW response
7032 */
7033static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
7034                              void *__unused)
7035{
7036        struct compound_hdr hdr;
7037        int status;
7038
7039        status = decode_compound_hdr(xdr, &hdr);
7040        if (!status)
7041                status = decode_renew(xdr);
7042        return status;
7043}
7044
7045/*
7046 * Decode SETCLIENTID response
7047 */
7048static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
7049                                    struct xdr_stream *xdr,
7050                                    void *data)
7051{
7052        struct nfs4_setclientid_res *res = data;
7053        struct compound_hdr hdr;
7054        int status;
7055
7056        status = decode_compound_hdr(xdr, &hdr);
7057        if (!status)
7058                status = decode_setclientid(xdr, res);
7059        return status;
7060}
7061
7062/*
7063 * Decode SETCLIENTID_CONFIRM response
7064 */
7065static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
7066                                            struct xdr_stream *xdr,
7067                                            void *data)
7068{
7069        struct compound_hdr hdr;
7070        int status;
7071
7072        status = decode_compound_hdr(xdr, &hdr);
7073        if (!status)
7074                status = decode_setclientid_confirm(xdr);
7075        return status;
7076}
7077
7078/*
7079 * Decode DELEGRETURN response
7080 */
7081static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
7082                                    struct xdr_stream *xdr,
7083                                    void *data)
7084{
7085        struct nfs4_delegreturnres *res = data;
7086        struct compound_hdr hdr;
7087        int status;
7088
7089        status = decode_compound_hdr(xdr, &hdr);
7090        if (status)
7091                goto out;
7092        status = decode_sequence(xdr, &res->seq_res, rqstp);
7093        if (status)
7094                goto out;
7095        status = decode_putfh(xdr);
7096        if (status != 0)
7097                goto out;
7098        if (res->lr_res) {
7099                status = decode_layoutreturn(xdr, res->lr_res);
7100                res->lr_ret = status;
7101                if (status)
7102                        goto out;
7103        }
7104        if (res->fattr) {
7105                status = decode_getfattr(xdr, res->fattr, res->server);
7106                if (status != 0)
7107                        goto out;
7108        }
7109        status = decode_delegreturn(xdr);
7110out:
7111        return status;
7112}
7113
7114/*
7115 * Decode FS_LOCATIONS response
7116 */
7117static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
7118                                     struct xdr_stream *xdr,
7119                                     void *data)
7120{
7121        struct nfs4_fs_locations_res *res = data;
7122        struct compound_hdr hdr;
7123        int status;
7124
7125        status = decode_compound_hdr(xdr, &hdr);
7126        if (status)
7127                goto out;
7128        status = decode_sequence(xdr, &res->seq_res, req);
7129        if (status)
7130                goto out;
7131        status = decode_putfh(xdr);
7132        if (status)
7133                goto out;
7134        if (res->migration) {
7135                xdr_enter_page(xdr, PAGE_SIZE);
7136                status = decode_getfattr_generic(xdr,
7137                                        &res->fs_locations->fattr,
7138                                         NULL, res->fs_locations,
7139                                         NULL, res->fs_locations->server);
7140                if (status)
7141                        goto out;
7142                if (res->renew)
7143                        status = decode_renew(xdr);
7144        } else {
7145                status = decode_lookup(xdr);
7146                if (status)
7147                        goto out;
7148                xdr_enter_page(xdr, PAGE_SIZE);
7149                status = decode_getfattr_generic(xdr,
7150                                        &res->fs_locations->fattr,
7151                                         NULL, res->fs_locations,
7152                                         NULL, res->fs_locations->server);
7153        }
7154out:
7155        return status;
7156}
7157
7158/*
7159 * Decode SECINFO response
7160 */
7161static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
7162                                struct xdr_stream *xdr,
7163                                void *data)
7164{
7165        struct nfs4_secinfo_res *res = data;
7166        struct compound_hdr hdr;
7167        int status;
7168
7169        status = decode_compound_hdr(xdr, &hdr);
7170        if (status)
7171                goto out;
7172        status = decode_sequence(xdr, &res->seq_res, rqstp);
7173        if (status)
7174                goto out;
7175        status = decode_putfh(xdr);
7176        if (status)
7177                goto out;
7178        status = decode_secinfo(xdr, res);
7179out:
7180        return status;
7181}
7182
7183/*
7184 * Decode FSID_PRESENT response
7185 */
7186static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
7187                                     struct xdr_stream *xdr,
7188                                     void *data)
7189{
7190        struct nfs4_fsid_present_res *res = data;
7191        struct compound_hdr hdr;
7192        int status;
7193
7194        status = decode_compound_hdr(xdr, &hdr);
7195        if (status)
7196                goto out;
7197        status = decode_sequence(xdr, &res->seq_res, rqstp);
7198        if (status)
7199                goto out;
7200        status = decode_putfh(xdr);
7201        if (status)
7202                goto out;
7203        status = decode_getfh(xdr, res->fh);
7204        if (status)
7205                goto out;
7206        if (res->renew)
7207                status = decode_renew(xdr);
7208out:
7209        return status;
7210}
7211
7212#if defined(CONFIG_NFS_V4_1)
7213/*
7214 * Decode BIND_CONN_TO_SESSION response
7215 */
7216static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
7217                                        struct xdr_stream *xdr,
7218                                        void *res)
7219{
7220        struct compound_hdr hdr;
7221        int status;
7222
7223        status = decode_compound_hdr(xdr, &hdr);
7224        if (!status)
7225                status = decode_bind_conn_to_session(xdr, res);
7226        return status;
7227}
7228
7229/*
7230 * Decode EXCHANGE_ID response
7231 */
7232static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
7233                                    struct xdr_stream *xdr,
7234                                    void *res)
7235{
7236        struct compound_hdr hdr;
7237        int status;
7238
7239        status = decode_compound_hdr(xdr, &hdr);
7240        if (!status)
7241                status = decode_exchange_id(xdr, res);
7242        return status;
7243}
7244
7245/*
7246 * Decode CREATE_SESSION response
7247 */
7248static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
7249                                       struct xdr_stream *xdr,
7250                                       void *res)
7251{
7252        struct compound_hdr hdr;
7253        int status;
7254
7255        status = decode_compound_hdr(xdr, &hdr);
7256        if (!status)
7257                status = decode_create_session(xdr, res);
7258        return status;
7259}
7260
7261/*
7262 * Decode DESTROY_SESSION response
7263 */
7264static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
7265                                        struct xdr_stream *xdr,
7266                                        void *res)
7267{
7268        struct compound_hdr hdr;
7269        int status;
7270
7271        status = decode_compound_hdr(xdr, &hdr);
7272        if (!status)
7273                status = decode_destroy_session(xdr, res);
7274        return status;
7275}
7276
7277/*
7278 * Decode DESTROY_CLIENTID response
7279 */
7280static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
7281                                        struct xdr_stream *xdr,
7282                                        void *res)
7283{
7284        struct compound_hdr hdr;
7285        int status;
7286
7287        status = decode_compound_hdr(xdr, &hdr);
7288        if (!status)
7289                status = decode_destroy_clientid(xdr, res);
7290        return status;
7291}
7292
7293/*
7294 * Decode SEQUENCE response
7295 */
7296static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
7297                                 struct xdr_stream *xdr,
7298                                 void *res)
7299{
7300        struct compound_hdr hdr;
7301        int status;
7302
7303        status = decode_compound_hdr(xdr, &hdr);
7304        if (!status)
7305                status = decode_sequence(xdr, res, rqstp);
7306        return status;
7307}
7308
7309/*
7310 * Decode GET_LEASE_TIME response
7311 */
7312static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
7313                                       struct xdr_stream *xdr,
7314                                       void *data)
7315{
7316        struct nfs4_get_lease_time_res *res = data;
7317        struct compound_hdr hdr;
7318        int status;
7319
7320        status = decode_compound_hdr(xdr, &hdr);
7321        if (!status)
7322                status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
7323        if (!status)
7324                status = decode_putrootfh(xdr);
7325        if (!status)
7326                status = decode_fsinfo(xdr, res->lr_fsinfo);
7327        return status;
7328}
7329
7330/*
7331 * Decode RECLAIM_COMPLETE response
7332 */
7333static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7334                                         struct xdr_stream *xdr,
7335                                         void *data)
7336{
7337        struct nfs41_reclaim_complete_res *res = data;
7338        struct compound_hdr hdr;
7339        int status;
7340
7341        status = decode_compound_hdr(xdr, &hdr);
7342        if (!status)
7343                status = decode_sequence(xdr, &res->seq_res, rqstp);
7344        if (!status)
7345                status = decode_reclaim_complete(xdr, NULL);
7346        return status;
7347}
7348
7349/*
7350 * Decode GETDEVINFO response
7351 */
7352static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7353                                      struct xdr_stream *xdr,
7354                                      void *data)
7355{
7356        struct nfs4_getdeviceinfo_res *res = data;
7357        struct compound_hdr hdr;
7358        int status;
7359
7360        status = decode_compound_hdr(xdr, &hdr);
7361        if (status != 0)
7362                goto out;
7363        status = decode_sequence(xdr, &res->seq_res, rqstp);
7364        if (status != 0)
7365                goto out;
7366        status = decode_getdeviceinfo(xdr, res);
7367out:
7368        return status;
7369}
7370
7371/*
7372 * Decode LAYOUTGET response
7373 */
7374static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7375                                  struct xdr_stream *xdr,
7376                                  void *data)
7377{
7378        struct nfs4_layoutget_res *res = data;
7379        struct compound_hdr hdr;
7380        int status;
7381
7382        status = decode_compound_hdr(xdr, &hdr);
7383        if (status)
7384                goto out;
7385        status = decode_sequence(xdr, &res->seq_res, rqstp);
7386        if (status)
7387                goto out;
7388        status = decode_putfh(xdr);
7389        if (status)
7390                goto out;
7391        status = decode_layoutget(xdr, rqstp, res);
7392out:
7393        return status;
7394}
7395
7396/*
7397 * Decode LAYOUTRETURN response
7398 */
7399static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7400                                     struct xdr_stream *xdr,
7401                                     void *data)
7402{
7403        struct nfs4_layoutreturn_res *res = data;
7404        struct compound_hdr hdr;
7405        int status;
7406
7407        status = decode_compound_hdr(xdr, &hdr);
7408        if (status)
7409                goto out;
7410        status = decode_sequence(xdr, &res->seq_res, rqstp);
7411        if (status)
7412                goto out;
7413        status = decode_putfh(xdr);
7414        if (status)
7415                goto out;
7416        status = decode_layoutreturn(xdr, res);
7417out:
7418        return status;
7419}
7420
7421/*
7422 * Decode LAYOUTCOMMIT response
7423 */
7424static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7425                                     struct xdr_stream *xdr,
7426                                     void *data)
7427{
7428        struct nfs4_layoutcommit_res *res = data;
7429        struct compound_hdr hdr;
7430        int status;
7431
7432        status = decode_compound_hdr(xdr, &hdr);
7433        if (status)
7434                goto out;
7435        status = decode_sequence(xdr, &res->seq_res, rqstp);
7436        if (status)
7437                goto out;
7438        status = decode_putfh(xdr);
7439        if (status)
7440                goto out;
7441        status = decode_layoutcommit(xdr, rqstp, res);
7442        if (status)
7443                goto out;
7444        decode_getfattr(xdr, res->fattr, res->server);
7445out:
7446        return status;
7447}
7448
7449/*
7450 * Decode SECINFO_NO_NAME response
7451 */
7452static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7453                                        struct xdr_stream *xdr,
7454                                        void *data)
7455{
7456        struct nfs4_secinfo_res *res = data;
7457        struct compound_hdr hdr;
7458        int status;
7459
7460        status = decode_compound_hdr(xdr, &hdr);
7461        if (status)
7462                goto out;
7463        status = decode_sequence(xdr, &res->seq_res, rqstp);
7464        if (status)
7465                goto out;
7466        status = decode_putrootfh(xdr);
7467        if (status)
7468                goto out;
7469        status = decode_secinfo_no_name(xdr, res);
7470out:
7471        return status;
7472}
7473
7474/*
7475 * Decode TEST_STATEID response
7476 */
7477static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7478                                     struct xdr_stream *xdr,
7479                                     void *data)
7480{
7481        struct nfs41_test_stateid_res *res = data;
7482        struct compound_hdr hdr;
7483        int status;
7484
7485        status = decode_compound_hdr(xdr, &hdr);
7486        if (status)
7487                goto out;
7488        status = decode_sequence(xdr, &res->seq_res, rqstp);
7489        if (status)
7490                goto out;
7491        status = decode_test_stateid(xdr, res);
7492out:
7493        return status;
7494}
7495
7496/*
7497 * Decode FREE_STATEID response
7498 */
7499static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7500                                     struct xdr_stream *xdr,
7501                                     void *data)
7502{
7503        struct nfs41_free_stateid_res *res = data;
7504        struct compound_hdr hdr;
7505        int status;
7506
7507        status = decode_compound_hdr(xdr, &hdr);
7508        if (status)
7509                goto out;
7510        status = decode_sequence(xdr, &res->seq_res, rqstp);
7511        if (status)
7512                goto out;
7513        status = decode_free_stateid(xdr, res);
7514out:
7515        return status;
7516}
7517#endif /* CONFIG_NFS_V4_1 */
7518
7519/**
7520 * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7521 *                      the local page cache.
7522 * @xdr: XDR stream where entry resides
7523 * @entry: buffer to fill in with entry data
7524 * @plus: boolean indicating whether this should be a readdirplus entry
7525 *
7526 * Returns zero if successful, otherwise a negative errno value is
7527 * returned.
7528 *
7529 * This function is not invoked during READDIR reply decoding, but
7530 * rather whenever an application invokes the getdents(2) system call
7531 * on a directory already in our cache.
7532 */
7533int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7534                       bool plus)
7535{
7536        unsigned int savep;
7537        uint32_t bitmap[3] = {0};
7538        uint32_t len;
7539        __be32 *p = xdr_inline_decode(xdr, 4);
7540        if (unlikely(!p))
7541                goto out_overflow;
7542        if (*p == xdr_zero) {
7543                p = xdr_inline_decode(xdr, 4);
7544                if (unlikely(!p))
7545                        goto out_overflow;
7546                if (*p == xdr_zero)
7547                        return -EAGAIN;
7548                entry->eof = 1;
7549                return -EBADCOOKIE;
7550        }
7551
7552        p = xdr_inline_decode(xdr, 12);
7553        if (unlikely(!p))
7554                goto out_overflow;
7555        entry->prev_cookie = entry->cookie;
7556        p = xdr_decode_hyper(p, &entry->cookie);
7557        entry->len = be32_to_cpup(p);
7558
7559        p = xdr_inline_decode(xdr, entry->len);
7560        if (unlikely(!p))
7561                goto out_overflow;
7562        entry->name = (const char *) p;
7563
7564        /*
7565         * In case the server doesn't return an inode number,
7566         * we fake one here.  (We don't use inode number 0,
7567         * since glibc seems to choke on it...)
7568         */
7569        entry->ino = 1;
7570        entry->fattr->valid = 0;
7571
7572        if (decode_attr_bitmap(xdr, bitmap) < 0)
7573                goto out_overflow;
7574
7575        if (decode_attr_length(xdr, &len, &savep) < 0)
7576                goto out_overflow;
7577
7578        if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7579                        NULL, entry->label, entry->server) < 0)
7580                goto out_overflow;
7581        if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7582                entry->ino = entry->fattr->mounted_on_fileid;
7583        else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7584                entry->ino = entry->fattr->fileid;
7585
7586        entry->d_type = DT_UNKNOWN;
7587        if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7588                entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7589
7590        return 0;
7591
7592out_overflow:
7593        print_overflow_msg(__func__, xdr);
7594        return -EAGAIN;
7595}
7596
7597/*
7598 * We need to translate between nfs status return values and
7599 * the local errno values which may not be the same.
7600 */
7601static struct {
7602        int stat;
7603        int errno;
7604} nfs_errtbl[] = {
7605        { NFS4_OK,              0               },
7606        { NFS4ERR_PERM,         -EPERM          },
7607        { NFS4ERR_NOENT,        -ENOENT         },
7608        { NFS4ERR_IO,           -errno_NFSERR_IO},
7609        { NFS4ERR_NXIO,         -ENXIO          },
7610        { NFS4ERR_ACCESS,       -EACCES         },
7611        { NFS4ERR_EXIST,        -EEXIST         },
7612        { NFS4ERR_XDEV,         -EXDEV          },
7613        { NFS4ERR_NOTDIR,       -ENOTDIR        },
7614        { NFS4ERR_ISDIR,        -EISDIR         },
7615        { NFS4ERR_INVAL,        -EINVAL         },
7616        { NFS4ERR_FBIG,         -EFBIG          },
7617        { NFS4ERR_NOSPC,        -ENOSPC         },
7618        { NFS4ERR_ROFS,         -EROFS          },
7619        { NFS4ERR_MLINK,        -EMLINK         },
7620        { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
7621        { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
7622        { NFS4ERR_DQUOT,        -EDQUOT         },
7623        { NFS4ERR_STALE,        -ESTALE         },
7624        { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
7625        { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
7626        { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
7627        { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
7628        { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
7629        { NFS4ERR_BADTYPE,      -EBADTYPE       },
7630        { NFS4ERR_LOCKED,       -EAGAIN         },
7631        { NFS4ERR_SYMLINK,      -ELOOP          },
7632        { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
7633        { NFS4ERR_DEADLOCK,     -EDEADLK        },
7634        { -1,                   -EIO            }
7635};
7636
7637/*
7638 * Convert an NFS error code to a local one.
7639 * This one is used jointly by NFSv2 and NFSv3.
7640 */
7641static int
7642nfs4_stat_to_errno(int stat)
7643{
7644        int i;
7645        for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7646                if (nfs_errtbl[i].stat == stat)
7647                        return nfs_errtbl[i].errno;
7648        }
7649        if (stat <= 10000 || stat > 10100) {
7650                /* The server is looney tunes. */
7651                return -EREMOTEIO;
7652        }
7653        /* If we cannot translate the error, the recovery routines should
7654         * handle it.
7655         * Note: remaining NFSv4 error codes have values > 10000, so should
7656         * not conflict with native Linux error codes.
7657         */
7658        return -stat;
7659}
7660
7661#ifdef CONFIG_NFS_V4_2
7662#include "nfs42xdr.c"
7663#endif /* CONFIG_NFS_V4_2 */
7664
7665#define PROC(proc, argtype, restype)                            \
7666[NFSPROC4_CLNT_##proc] = {                                      \
7667        .p_proc   = NFSPROC4_COMPOUND,                          \
7668        .p_encode = nfs4_xdr_##argtype,                         \
7669        .p_decode = nfs4_xdr_##restype,                         \
7670        .p_arglen = NFS4_##argtype##_sz,                        \
7671        .p_replen = NFS4_##restype##_sz,                        \
7672        .p_statidx = NFSPROC4_CLNT_##proc,                      \
7673        .p_name   = #proc,                                      \
7674}
7675
7676#define STUB(proc)              \
7677[NFSPROC4_CLNT_##proc] = {      \
7678        .p_name = #proc,        \
7679}
7680
7681const struct rpc_procinfo nfs4_procedures[] = {
7682        PROC(READ,              enc_read,               dec_read),
7683        PROC(WRITE,             enc_write,              dec_write),
7684        PROC(COMMIT,            enc_commit,             dec_commit),
7685        PROC(OPEN,              enc_open,               dec_open),
7686        PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
7687        PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
7688        PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
7689        PROC(CLOSE,             enc_close,              dec_close),
7690        PROC(SETATTR,           enc_setattr,            dec_setattr),
7691        PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
7692        PROC(RENEW,             enc_renew,              dec_renew),
7693        PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
7694        PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7695        PROC(LOCK,              enc_lock,               dec_lock),
7696        PROC(LOCKT,             enc_lockt,              dec_lockt),
7697        PROC(LOCKU,             enc_locku,              dec_locku),
7698        PROC(ACCESS,            enc_access,             dec_access),
7699        PROC(GETATTR,           enc_getattr,            dec_getattr),
7700        PROC(LOOKUP,            enc_lookup,             dec_lookup),
7701        PROC(LOOKUPP,           enc_lookupp,            dec_lookupp),
7702        PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
7703        PROC(REMOVE,            enc_remove,             dec_remove),
7704        PROC(RENAME,            enc_rename,             dec_rename),
7705        PROC(LINK,              enc_link,               dec_link),
7706        PROC(SYMLINK,           enc_symlink,            dec_symlink),
7707        PROC(CREATE,            enc_create,             dec_create),
7708        PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
7709        PROC(STATFS,            enc_statfs,             dec_statfs),
7710        PROC(READLINK,          enc_readlink,           dec_readlink),
7711        PROC(READDIR,           enc_readdir,            dec_readdir),
7712        PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
7713        PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
7714        PROC(GETACL,            enc_getacl,             dec_getacl),
7715        PROC(SETACL,            enc_setacl,             dec_setacl),
7716        PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
7717        PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
7718        PROC(SECINFO,           enc_secinfo,            dec_secinfo),
7719        PROC(FSID_PRESENT,      enc_fsid_present,       dec_fsid_present),
7720#if defined(CONFIG_NFS_V4_1)
7721        PROC(EXCHANGE_ID,       enc_exchange_id,        dec_exchange_id),
7722        PROC(CREATE_SESSION,    enc_create_session,     dec_create_session),
7723        PROC(DESTROY_SESSION,   enc_destroy_session,    dec_destroy_session),
7724        PROC(SEQUENCE,          enc_sequence,           dec_sequence),
7725        PROC(GET_LEASE_TIME,    enc_get_lease_time,     dec_get_lease_time),
7726        PROC(RECLAIM_COMPLETE,  enc_reclaim_complete,   dec_reclaim_complete),
7727        PROC(GETDEVICEINFO,     enc_getdeviceinfo,      dec_getdeviceinfo),
7728        PROC(LAYOUTGET,         enc_layoutget,          dec_layoutget),
7729        PROC(LAYOUTCOMMIT,      enc_layoutcommit,       dec_layoutcommit),
7730        PROC(LAYOUTRETURN,      enc_layoutreturn,       dec_layoutreturn),
7731        PROC(SECINFO_NO_NAME,   enc_secinfo_no_name,    dec_secinfo_no_name),
7732        PROC(TEST_STATEID,      enc_test_stateid,       dec_test_stateid),
7733        PROC(FREE_STATEID,      enc_free_stateid,       dec_free_stateid),
7734        STUB(GETDEVICELIST),
7735        PROC(BIND_CONN_TO_SESSION,
7736                        enc_bind_conn_to_session, dec_bind_conn_to_session),
7737        PROC(DESTROY_CLIENTID,  enc_destroy_clientid,   dec_destroy_clientid),
7738#endif /* CONFIG_NFS_V4_1 */
7739#ifdef CONFIG_NFS_V4_2
7740        PROC(SEEK,              enc_seek,               dec_seek),
7741        PROC(ALLOCATE,          enc_allocate,           dec_allocate),
7742        PROC(DEALLOCATE,        enc_deallocate,         dec_deallocate),
7743        PROC(LAYOUTSTATS,       enc_layoutstats,        dec_layoutstats),
7744        PROC(CLONE,             enc_clone,              dec_clone),
7745        PROC(COPY,              enc_copy,               dec_copy),
7746#endif /* CONFIG_NFS_V4_2 */
7747};
7748
7749static unsigned int nfs_version4_counts[ARRAY_SIZE(nfs4_procedures)];
7750const struct rpc_version nfs_version4 = {
7751        .number                 = 4,
7752        .nrprocs                = ARRAY_SIZE(nfs4_procedures),
7753        .procs                  = nfs4_procedures,
7754        .counts                 = nfs_version4_counts,
7755};
7756
7757/*
7758 * Local variables:
7759 *  c-basic-offset: 8
7760 * End:
7761 */
7762