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_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4389{
4390        int status;
4391
4392        status = decode_op_hdr(xdr, OP_CLOSE);
4393        if (status != -EIO)
4394                nfs_increment_open_seqid(status, res->seqid);
4395        if (!status)
4396                status = decode_open_stateid(xdr, &res->stateid);
4397        return status;
4398}
4399
4400static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4401{
4402        return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4403}
4404
4405static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4406{
4407        return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4408}
4409
4410static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4411{
4412        int status;
4413
4414        status = decode_op_hdr(xdr, OP_COMMIT);
4415        if (!status)
4416                status = decode_write_verifier(xdr, &res->verf->verifier);
4417        return status;
4418}
4419
4420static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4421{
4422        __be32 *p;
4423        uint32_t bmlen;
4424        int status;
4425
4426        status = decode_op_hdr(xdr, OP_CREATE);
4427        if (status)
4428                return status;
4429        if ((status = decode_change_info(xdr, cinfo)))
4430                return status;
4431        p = xdr_inline_decode(xdr, 4);
4432        if (unlikely(!p))
4433                goto out_overflow;
4434        bmlen = be32_to_cpup(p);
4435        p = xdr_inline_decode(xdr, bmlen << 2);
4436        if (likely(p))
4437                return 0;
4438out_overflow:
4439        print_overflow_msg(__func__, xdr);
4440        return -EIO;
4441}
4442
4443static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4444{
4445        unsigned int savep;
4446        uint32_t attrlen, bitmap[3] = {0};
4447        int status;
4448
4449        if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4450                goto xdr_error;
4451        if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4452                goto xdr_error;
4453        if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4454                goto xdr_error;
4455        if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4456                goto xdr_error;
4457        if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4458                                                 &res->fh_expire_type)) != 0)
4459                goto xdr_error;
4460        if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4461                goto xdr_error;
4462        if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4463                goto xdr_error;
4464        if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4465                goto xdr_error;
4466        if ((status = decode_attr_exclcreat_supported(xdr, bitmap,
4467                                res->exclcreat_bitmask)) != 0)
4468                goto xdr_error;
4469        status = verify_attr_len(xdr, savep, attrlen);
4470xdr_error:
4471        dprintk("%s: xdr returned %d!\n", __func__, -status);
4472        return status;
4473}
4474
4475static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4476{
4477        unsigned int savep;
4478        uint32_t attrlen, bitmap[3] = {0};
4479        int status;
4480
4481        if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4482                goto xdr_error;
4483        if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4484                goto xdr_error;
4485        if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4486                goto xdr_error;
4487
4488        if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4489                goto xdr_error;
4490        if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4491                goto xdr_error;
4492        if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4493                goto xdr_error;
4494
4495        status = -EIO;
4496        if (unlikely(bitmap[0]))
4497                goto xdr_error;
4498
4499        if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4500                goto xdr_error;
4501        if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4502                goto xdr_error;
4503        if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4504                goto xdr_error;
4505
4506        status = verify_attr_len(xdr, savep, attrlen);
4507xdr_error:
4508        dprintk("%s: xdr returned %d!\n", __func__, -status);
4509        return status;
4510}
4511
4512static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4513{
4514        unsigned int savep;
4515        uint32_t attrlen, bitmap[3] = {0};
4516        int status;
4517
4518        if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4519                goto xdr_error;
4520        if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4521                goto xdr_error;
4522        if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4523                goto xdr_error;
4524
4525        if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4526                goto xdr_error;
4527        if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4528                goto xdr_error;
4529
4530        status = verify_attr_len(xdr, savep, attrlen);
4531xdr_error:
4532        dprintk("%s: xdr returned %d!\n", __func__, -status);
4533        return status;
4534}
4535
4536static int decode_threshold_hint(struct xdr_stream *xdr,
4537                                  uint32_t *bitmap,
4538                                  uint64_t *res,
4539                                  uint32_t hint_bit)
4540{
4541        __be32 *p;
4542
4543        *res = 0;
4544        if (likely(bitmap[0] & hint_bit)) {
4545                p = xdr_inline_decode(xdr, 8);
4546                if (unlikely(!p))
4547                        goto out_overflow;
4548                xdr_decode_hyper(p, res);
4549        }
4550        return 0;
4551out_overflow:
4552        print_overflow_msg(__func__, xdr);
4553        return -EIO;
4554}
4555
4556static int decode_first_threshold_item4(struct xdr_stream *xdr,
4557                                        struct nfs4_threshold *res)
4558{
4559        __be32 *p;
4560        unsigned int savep;
4561        uint32_t bitmap[3] = {0,}, attrlen;
4562        int status;
4563
4564        /* layout type */
4565        p = xdr_inline_decode(xdr, 4);
4566        if (unlikely(!p)) {
4567                print_overflow_msg(__func__, xdr);
4568                return -EIO;
4569        }
4570        res->l_type = be32_to_cpup(p);
4571
4572        /* thi_hintset bitmap */
4573        status = decode_attr_bitmap(xdr, bitmap);
4574        if (status < 0)
4575                goto xdr_error;
4576
4577        /* thi_hintlist length */
4578        status = decode_attr_length(xdr, &attrlen, &savep);
4579        if (status < 0)
4580                goto xdr_error;
4581        /* thi_hintlist */
4582        status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4583        if (status < 0)
4584                goto xdr_error;
4585        status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4586        if (status < 0)
4587                goto xdr_error;
4588        status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4589                                       THRESHOLD_RD_IO);
4590        if (status < 0)
4591                goto xdr_error;
4592        status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4593                                       THRESHOLD_WR_IO);
4594        if (status < 0)
4595                goto xdr_error;
4596
4597        status = verify_attr_len(xdr, savep, attrlen);
4598        res->bm = bitmap[0];
4599
4600        dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4601                 __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4602                res->wr_io_sz);
4603xdr_error:
4604        dprintk("%s ret=%d!\n", __func__, status);
4605        return status;
4606}
4607
4608/*
4609 * Thresholds on pNFS direct I/O vrs MDS I/O
4610 */
4611static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4612                                    uint32_t *bitmap,
4613                                    struct nfs4_threshold *res)
4614{
4615        __be32 *p;
4616        int status = 0;
4617        uint32_t num;
4618
4619        if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4620                return -EIO;
4621        if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4622                /* Did the server return an unrequested attribute? */
4623                if (unlikely(res == NULL))
4624                        return -EREMOTEIO;
4625                p = xdr_inline_decode(xdr, 4);
4626                if (unlikely(!p))
4627                        goto out_overflow;
4628                num = be32_to_cpup(p);
4629                if (num == 0)
4630                        return 0;
4631                if (num > 1)
4632                        printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4633                                "drivers per filesystem not supported\n",
4634                                __func__);
4635
4636                status = decode_first_threshold_item4(xdr, res);
4637                bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4638        }
4639        return status;
4640out_overflow:
4641        print_overflow_msg(__func__, xdr);
4642        return -EIO;
4643}
4644
4645static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4646                struct nfs_fattr *fattr, struct nfs_fh *fh,
4647                struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4648                const struct nfs_server *server)
4649{
4650        int status;
4651        umode_t fmode = 0;
4652        uint32_t type;
4653        int32_t err;
4654
4655        status = decode_attr_type(xdr, bitmap, &type);
4656        if (status < 0)
4657                goto xdr_error;
4658        fattr->mode = 0;
4659        if (status != 0) {
4660                fattr->mode |= nfs_type2fmt[type];
4661                fattr->valid |= status;
4662        }
4663
4664        status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4665        if (status < 0)
4666                goto xdr_error;
4667        fattr->valid |= status;
4668
4669        status = decode_attr_size(xdr, bitmap, &fattr->size);
4670        if (status < 0)
4671                goto xdr_error;
4672        fattr->valid |= status;
4673
4674        status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4675        if (status < 0)
4676                goto xdr_error;
4677        fattr->valid |= status;
4678
4679        err = 0;
4680        status = decode_attr_error(xdr, bitmap, &err);
4681        if (status < 0)
4682                goto xdr_error;
4683
4684        status = decode_attr_filehandle(xdr, bitmap, fh);
4685        if (status < 0)
4686                goto xdr_error;
4687
4688        status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4689        if (status < 0)
4690                goto xdr_error;
4691        fattr->valid |= status;
4692
4693        status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4694        if (status < 0)
4695                goto xdr_error;
4696        fattr->valid |= status;
4697
4698        status = -EIO;
4699        if (unlikely(bitmap[0]))
4700                goto xdr_error;
4701
4702        status = decode_attr_mode(xdr, bitmap, &fmode);
4703        if (status < 0)
4704                goto xdr_error;
4705        if (status != 0) {
4706                fattr->mode |= fmode;
4707                fattr->valid |= status;
4708        }
4709
4710        status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4711        if (status < 0)
4712                goto xdr_error;
4713        fattr->valid |= status;
4714
4715        status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4716        if (status < 0)
4717                goto xdr_error;
4718        fattr->valid |= status;
4719
4720        status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4721        if (status < 0)
4722                goto xdr_error;
4723        fattr->valid |= status;
4724
4725        status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4726        if (status < 0)
4727                goto xdr_error;
4728        fattr->valid |= status;
4729
4730        status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4731        if (status < 0)
4732                goto xdr_error;
4733        fattr->valid |= status;
4734
4735        status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4736        if (status < 0)
4737                goto xdr_error;
4738        fattr->valid |= status;
4739
4740        status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4741        if (status < 0)
4742                goto xdr_error;
4743        fattr->valid |= status;
4744
4745        status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4746        if (status < 0)
4747                goto xdr_error;
4748        fattr->valid |= status;
4749
4750        status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4751        if (status < 0)
4752                goto xdr_error;
4753        fattr->valid |= status;
4754
4755        status = -EIO;
4756        if (unlikely(bitmap[1]))
4757                goto xdr_error;
4758
4759        status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4760        if (status < 0)
4761                goto xdr_error;
4762
4763        if (label) {
4764                status = decode_attr_security_label(xdr, bitmap, label);
4765                if (status < 0)
4766                        goto xdr_error;
4767                fattr->valid |= status;
4768        }
4769
4770xdr_error:
4771        dprintk("%s: xdr returned %d\n", __func__, -status);
4772        return status;
4773}
4774
4775static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4776                struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4777                struct nfs4_label *label, const struct nfs_server *server)
4778{
4779        unsigned int savep;
4780        uint32_t attrlen,
4781                 bitmap[3] = {0};
4782        int status;
4783
4784        status = decode_op_hdr(xdr, OP_GETATTR);
4785        if (status < 0)
4786                goto xdr_error;
4787
4788        status = decode_attr_bitmap(xdr, bitmap);
4789        if (status < 0)
4790                goto xdr_error;
4791
4792        status = decode_attr_length(xdr, &attrlen, &savep);
4793        if (status < 0)
4794                goto xdr_error;
4795
4796        status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4797                                        label, server);
4798        if (status < 0)
4799                goto xdr_error;
4800
4801        status = verify_attr_len(xdr, savep, attrlen);
4802xdr_error:
4803        dprintk("%s: xdr returned %d\n", __func__, -status);
4804        return status;
4805}
4806
4807static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4808                struct nfs4_label *label, const struct nfs_server *server)
4809{
4810        return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4811}
4812
4813static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4814                const struct nfs_server *server)
4815{
4816        return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4817}
4818
4819/*
4820 * Decode potentially multiple layout types.
4821 */
4822static int decode_pnfs_layout_types(struct xdr_stream *xdr,
4823                                    struct nfs_fsinfo *fsinfo)
4824{
4825        __be32 *p;
4826        uint32_t i;
4827
4828        p = xdr_inline_decode(xdr, 4);
4829        if (unlikely(!p))
4830                goto out_overflow;
4831        fsinfo->nlayouttypes = be32_to_cpup(p);
4832
4833        /* pNFS is not supported by the underlying file system */
4834        if (fsinfo->nlayouttypes == 0)
4835                return 0;
4836
4837        /* Decode and set first layout type, move xdr->p past unused types */
4838        p = xdr_inline_decode(xdr, fsinfo->nlayouttypes * 4);
4839        if (unlikely(!p))
4840                goto out_overflow;
4841
4842        /* If we get too many, then just cap it at the max */
4843        if (fsinfo->nlayouttypes > NFS_MAX_LAYOUT_TYPES) {
4844                printk(KERN_INFO "NFS: %s: Warning: Too many (%u) pNFS layout types\n",
4845                        __func__, fsinfo->nlayouttypes);
4846                fsinfo->nlayouttypes = NFS_MAX_LAYOUT_TYPES;
4847        }
4848
4849        for(i = 0; i < fsinfo->nlayouttypes; ++i)
4850                fsinfo->layouttype[i] = be32_to_cpup(p++);
4851        return 0;
4852out_overflow:
4853        print_overflow_msg(__func__, xdr);
4854        return -EIO;
4855}
4856
4857/*
4858 * The type of file system exported.
4859 * Note we must ensure that layouttype is set in any non-error case.
4860 */
4861static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4862                                struct nfs_fsinfo *fsinfo)
4863{
4864        int status = 0;
4865
4866        dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4867        if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4868                return -EIO;
4869        if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4870                status = decode_pnfs_layout_types(xdr, fsinfo);
4871                bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4872        }
4873        return status;
4874}
4875
4876/*
4877 * The prefered block size for layout directed io
4878 */
4879static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4880                                      uint32_t *res)
4881{
4882        __be32 *p;
4883
4884        dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4885        *res = 0;
4886        if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4887                p = xdr_inline_decode(xdr, 4);
4888                if (unlikely(!p)) {
4889                        print_overflow_msg(__func__, xdr);
4890                        return -EIO;
4891                }
4892                *res = be32_to_cpup(p);
4893                bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4894        }
4895        return 0;
4896}
4897
4898/*
4899 * The granularity of a CLONE operation.
4900 */
4901static int decode_attr_clone_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4902                                     uint32_t *res)
4903{
4904        __be32 *p;
4905
4906        dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4907        *res = 0;
4908        if (bitmap[2] & FATTR4_WORD2_CLONE_BLKSIZE) {
4909                p = xdr_inline_decode(xdr, 4);
4910                if (unlikely(!p)) {
4911                        print_overflow_msg(__func__, xdr);
4912                        return -EIO;
4913                }
4914                *res = be32_to_cpup(p);
4915                bitmap[2] &= ~FATTR4_WORD2_CLONE_BLKSIZE;
4916        }
4917        return 0;
4918}
4919
4920static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4921{
4922        unsigned int savep;
4923        uint32_t attrlen, bitmap[3];
4924        int status;
4925
4926        if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4927                goto xdr_error;
4928        if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4929                goto xdr_error;
4930        if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4931                goto xdr_error;
4932
4933        fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4934
4935        if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4936                goto xdr_error;
4937        if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4938                goto xdr_error;
4939        if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4940                goto xdr_error;
4941        fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4942        if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4943                goto xdr_error;
4944        fsinfo->wtpref = fsinfo->wtmax;
4945
4946        status = -EIO;
4947        if (unlikely(bitmap[0]))
4948                goto xdr_error;
4949
4950        status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4951        if (status != 0)
4952                goto xdr_error;
4953        status = decode_attr_pnfstype(xdr, bitmap, fsinfo);
4954        if (status != 0)
4955                goto xdr_error;
4956
4957        status = -EIO;
4958        if (unlikely(bitmap[1]))
4959                goto xdr_error;
4960
4961        status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4962        if (status)
4963                goto xdr_error;
4964        status = decode_attr_clone_blksize(xdr, bitmap, &fsinfo->clone_blksize);
4965        if (status)
4966                goto xdr_error;
4967
4968        status = verify_attr_len(xdr, savep, attrlen);
4969xdr_error:
4970        dprintk("%s: xdr returned %d!\n", __func__, -status);
4971        return status;
4972}
4973
4974static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4975{
4976        __be32 *p;
4977        uint32_t len;
4978        int status;
4979
4980        /* Zero handle first to allow comparisons */
4981        memset(fh, 0, sizeof(*fh));
4982
4983        status = decode_op_hdr(xdr, OP_GETFH);
4984        if (status)
4985                return status;
4986
4987        p = xdr_inline_decode(xdr, 4);
4988        if (unlikely(!p))
4989                goto out_overflow;
4990        len = be32_to_cpup(p);
4991        if (len > NFS4_FHSIZE)
4992                return -EIO;
4993        fh->size = len;
4994        p = xdr_inline_decode(xdr, len);
4995        if (unlikely(!p))
4996                goto out_overflow;
4997        memcpy(fh->data, p, len);
4998        return 0;
4999out_overflow:
5000        print_overflow_msg(__func__, xdr);

5001        return -EIO;
5002}
5003
5004static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5005{
5006        int status;
5007
5008        status = decode_op_hdr(xdr, OP_LINK);
5009        if (status)
5010                return status;
5011        return decode_change_info(xdr, cinfo);
5012}
5013
5014/*
5015 * We create the owner, so we know a proper owner.id length is 4.
5016 */
5017static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
5018{
5019        uint64_t offset, length, clientid;
5020        __be32 *p;
5021        uint32_t namelen, type;
5022
5023        p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
5024        if (unlikely(!p))
5025                goto out_overflow;
5026        p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
5027        p = xdr_decode_hyper(p, &length);
5028        type = be32_to_cpup(p++); /* 4 byte read */
5029        if (fl != NULL) { /* manipulate file lock */
5030                fl->fl_start = (loff_t)offset;
5031                fl->fl_end = fl->fl_start + (loff_t)length - 1;
5032                if (length == ~(uint64_t)0)
5033                        fl->fl_end = OFFSET_MAX;
5034                fl->fl_type = F_WRLCK;
5035                if (type & 1)
5036                        fl->fl_type = F_RDLCK;
5037                fl->fl_pid = 0;
5038        }
5039        p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
5040        namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
5041        p = xdr_inline_decode(xdr, namelen); /* variable size field */
5042        if (likely(p))
5043                return -NFS4ERR_DENIED;
5044out_overflow:
5045        print_overflow_msg(__func__, xdr);
5046        return -EIO;
5047}
5048
5049static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
5050{
5051        int status;
5052
5053        status = decode_op_hdr(xdr, OP_LOCK);
5054        if (status == -EIO)
5055                goto out;
5056        if (status == 0) {
5057                status = decode_lock_stateid(xdr, &res->stateid);
5058                if (unlikely(status))
5059                        goto out;
5060        } else if (status == -NFS4ERR_DENIED)
5061                status = decode_lock_denied(xdr, NULL);
5062        if (res->open_seqid != NULL)
5063                nfs_increment_open_seqid(status, res->open_seqid);
5064        nfs_increment_lock_seqid(status, res->lock_seqid);
5065out:
5066        return status;
5067}
5068
5069static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
5070{
5071        int status;
5072        status = decode_op_hdr(xdr, OP_LOCKT);
5073        if (status == -NFS4ERR_DENIED)
5074                return decode_lock_denied(xdr, res->denied);
5075        return status;
5076}
5077
5078static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
5079{
5080        int status;
5081
5082        status = decode_op_hdr(xdr, OP_LOCKU);
5083        if (status != -EIO)
5084                nfs_increment_lock_seqid(status, res->seqid);
5085        if (status == 0)
5086                status = decode_lock_stateid(xdr, &res->stateid);
5087        return status;
5088}
5089
5090static int decode_release_lockowner(struct xdr_stream *xdr)
5091{
5092        return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
5093}
5094
5095static int decode_lookup(struct xdr_stream *xdr)
5096{
5097        return decode_op_hdr(xdr, OP_LOOKUP);
5098}
5099
5100static int decode_lookupp(struct xdr_stream *xdr)
5101{
5102        return decode_op_hdr(xdr, OP_LOOKUPP);
5103}
5104
5105/* This is too sick! */
5106static int decode_space_limit(struct xdr_stream *xdr,
5107                unsigned long *pagemod_limit)
5108{
5109        __be32 *p;
5110        uint32_t limit_type, nblocks, blocksize;
5111        u64 maxsize = 0;
5112
5113        p = xdr_inline_decode(xdr, 12);
5114        if (unlikely(!p))
5115                goto out_overflow;
5116        limit_type = be32_to_cpup(p++);
5117        switch (limit_type) {
5118        case NFS4_LIMIT_SIZE:
5119                xdr_decode_hyper(p, &maxsize);
5120                break;
5121        case NFS4_LIMIT_BLOCKS:
5122                nblocks = be32_to_cpup(p++);
5123                blocksize = be32_to_cpup(p);
5124                maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
5125        }
5126        maxsize >>= PAGE_SHIFT;
5127        *pagemod_limit = min_t(u64, maxsize, ULONG_MAX);
5128        return 0;
5129out_overflow:
5130        print_overflow_msg(__func__, xdr);
5131        return -EIO;
5132}
5133
5134static int decode_rw_delegation(struct xdr_stream *xdr,
5135                uint32_t delegation_type,
5136                struct nfs_openres *res)
5137{
5138        __be32 *p;
5139        int status;
5140
5141        status = decode_delegation_stateid(xdr, &res->delegation);
5142        if (unlikely(status))
5143                return status;
5144        p = xdr_inline_decode(xdr, 4);
5145        if (unlikely(!p))
5146                goto out_overflow;
5147        res->do_recall = be32_to_cpup(p);
5148
5149        switch (delegation_type) {
5150        case NFS4_OPEN_DELEGATE_READ:
5151                res->delegation_type = FMODE_READ;
5152                break;
5153        case NFS4_OPEN_DELEGATE_WRITE:
5154                res->delegation_type = FMODE_WRITE|FMODE_READ;
5155                if (decode_space_limit(xdr, &res->pagemod_limit) < 0)
5156                                return -EIO;
5157        }
5158        return decode_ace(xdr, NULL);
5159out_overflow:
5160        print_overflow_msg(__func__, xdr);
5161        return -EIO;
5162}
5163
5164static int decode_no_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5165{
5166        __be32 *p;
5167        uint32_t why_no_delegation;
5168
5169        p = xdr_inline_decode(xdr, 4);
5170        if (unlikely(!p))
5171                goto out_overflow;
5172        why_no_delegation = be32_to_cpup(p);
5173        switch (why_no_delegation) {
5174                case WND4_CONTENTION:
5175                case WND4_RESOURCE:
5176                        xdr_inline_decode(xdr, 4);
5177                        /* Ignore for now */
5178        }
5179        return 0;
5180out_overflow:
5181        print_overflow_msg(__func__, xdr);
5182        return -EIO;
5183}
5184
5185static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5186{
5187        __be32 *p;
5188        uint32_t delegation_type;
5189
5190        p = xdr_inline_decode(xdr, 4);
5191        if (unlikely(!p))
5192                goto out_overflow;
5193        delegation_type = be32_to_cpup(p);
5194        res->delegation_type = 0;
5195        switch (delegation_type) {
5196        case NFS4_OPEN_DELEGATE_NONE:
5197                return 0;
5198        case NFS4_OPEN_DELEGATE_READ:
5199        case NFS4_OPEN_DELEGATE_WRITE:
5200                return decode_rw_delegation(xdr, delegation_type, res);
5201        case NFS4_OPEN_DELEGATE_NONE_EXT:
5202                return decode_no_delegation(xdr, res);
5203        }
5204        return -EIO;
5205out_overflow:
5206        print_overflow_msg(__func__, xdr);
5207        return -EIO;
5208}
5209
5210static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
5211{
5212        __be32 *p;
5213        uint32_t savewords, bmlen, i;
5214        int status;
5215
5216        if (!__decode_op_hdr(xdr, OP_OPEN, &status))
5217                return status;
5218        nfs_increment_open_seqid(status, res->seqid);
5219        if (status)
5220                return status;
5221        status = decode_open_stateid(xdr, &res->stateid);
5222        if (unlikely(status))
5223                return status;
5224
5225        decode_change_info(xdr, &res->cinfo);
5226
5227        p = xdr_inline_decode(xdr, 8);
5228        if (unlikely(!p))
5229                goto out_overflow;
5230        res->rflags = be32_to_cpup(p++);
5231        bmlen = be32_to_cpup(p);
5232        if (bmlen > 10)
5233                goto xdr_error;
5234
5235        p = xdr_inline_decode(xdr, bmlen << 2);
5236        if (unlikely(!p))
5237                goto out_overflow;
5238        savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5239        for (i = 0; i < savewords; ++i)
5240                res->attrset[i] = be32_to_cpup(p++);
5241        for (; i < NFS4_BITMAP_SIZE; i++)
5242                res->attrset[i] = 0;
5243
5244        return decode_delegation(xdr, res);
5245xdr_error:
5246        dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5247        return -EIO;
5248out_overflow:
5249        print_overflow_msg(__func__, xdr);
5250        return -EIO;
5251}
5252
5253static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5254{
5255        int status;
5256
5257        status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5258        if (status != -EIO)
5259                nfs_increment_open_seqid(status, res->seqid);
5260        if (!status)
5261                status = decode_open_stateid(xdr, &res->stateid);
5262        return status;
5263}
5264
5265static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5266{
5267        int status;
5268
5269        status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5270        if (status != -EIO)
5271                nfs_increment_open_seqid(status, res->seqid);
5272        if (!status)
5273                status = decode_open_stateid(xdr, &res->stateid);
5274        return status;
5275}
5276
5277static int decode_putfh(struct xdr_stream *xdr)
5278{
5279        return decode_op_hdr(xdr, OP_PUTFH);
5280}
5281
5282static int decode_putrootfh(struct xdr_stream *xdr)
5283{
5284        return decode_op_hdr(xdr, OP_PUTROOTFH);
5285}
5286
5287static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5288                       struct nfs_pgio_res *res)
5289{
5290        __be32 *p;
5291        uint32_t count, eof, recvd;
5292        int status;
5293
5294        status = decode_op_hdr(xdr, OP_READ);
5295        if (status)
5296                return status;
5297        p = xdr_inline_decode(xdr, 8);
5298        if (unlikely(!p))
5299                goto out_overflow;
5300        eof = be32_to_cpup(p++);
5301        count = be32_to_cpup(p);
5302        recvd = xdr_read_pages(xdr, count);
5303        if (count > recvd) {
5304                dprintk("NFS: server cheating in read reply: "
5305                                "count %u > recvd %u\n", count, recvd);
5306                count = recvd;
5307                eof = 0;
5308        }
5309        res->eof = eof;
5310        res->count = count;
5311        return 0;
5312out_overflow:
5313        print_overflow_msg(__func__, xdr);
5314        return -EIO;
5315}
5316
5317static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5318{
5319        int             status;
5320        __be32          verf[2];
5321
5322        status = decode_op_hdr(xdr, OP_READDIR);
5323        if (!status)
5324                status = decode_verifier(xdr, readdir->verifier.data);
5325        if (unlikely(status))
5326                return status;
5327        memcpy(verf, readdir->verifier.data, sizeof(verf));
5328        dprintk("%s: verifier = %08x:%08x\n",
5329                        __func__, verf[0], verf[1]);
5330        return xdr_read_pages(xdr, xdr->buf->page_len);
5331}
5332
5333static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5334{
5335        struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5336        u32 len, recvd;
5337        __be32 *p;
5338        int status;
5339
5340        status = decode_op_hdr(xdr, OP_READLINK);
5341        if (status)
5342                return status;
5343
5344        /* Convert length of symlink */
5345        p = xdr_inline_decode(xdr, 4);
5346        if (unlikely(!p))
5347                goto out_overflow;
5348        len = be32_to_cpup(p);
5349        if (len >= rcvbuf->page_len || len <= 0) {
5350                dprintk("nfs: server returned giant symlink!\n");
5351                return -ENAMETOOLONG;
5352        }
5353        recvd = xdr_read_pages(xdr, len);
5354        if (recvd < len) {
5355                dprintk("NFS: server cheating in readlink reply: "
5356                                "count %u > recvd %u\n", len, recvd);
5357                return -EIO;
5358        }
5359        /*
5360         * The XDR encode routine has set things up so that
5361         * the link text will be copied directly into the
5362         * buffer.  We just have to do overflow-checking,
5363         * and and null-terminate the text (the VFS expects
5364         * null-termination).
5365         */
5366        xdr_terminate_string(rcvbuf, len);
5367        return 0;
5368out_overflow:
5369        print_overflow_msg(__func__, xdr);
5370        return -EIO;
5371}
5372
5373static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5374{
5375        int status;
5376
5377        status = decode_op_hdr(xdr, OP_REMOVE);
5378        if (status)
5379                goto out;
5380        status = decode_change_info(xdr, cinfo);
5381out:
5382        return status;
5383}
5384
5385static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5386              struct nfs4_change_info *new_cinfo)
5387{
5388        int status;
5389
5390        status = decode_op_hdr(xdr, OP_RENAME);
5391        if (status)
5392                goto out;
5393        if ((status = decode_change_info(xdr, old_cinfo)))
5394                goto out;
5395        status = decode_change_info(xdr, new_cinfo);
5396out:
5397        return status;
5398}
5399
5400static int decode_renew(struct xdr_stream *xdr)
5401{
5402        return decode_op_hdr(xdr, OP_RENEW);
5403}
5404
5405static int
5406decode_restorefh(struct xdr_stream *xdr)
5407{
5408        return decode_op_hdr(xdr, OP_RESTOREFH);
5409}
5410
5411static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5412                         struct nfs_getaclres *res)
5413{
5414        unsigned int savep;
5415        uint32_t attrlen,
5416                 bitmap[3] = {0};
5417        int status;
5418        unsigned int pg_offset;
5419
5420        res->acl_len = 0;
5421        if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5422                goto out;
5423
5424        xdr_enter_page(xdr, xdr->buf->page_len);
5425
5426        /* Calculate the offset of the page data */
5427        pg_offset = xdr->buf->head[0].iov_len;
5428
5429        if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5430                goto out;
5431        if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5432                goto out;
5433
5434        if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5435                return -EIO;
5436        if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5437
5438                /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5439                 * are stored with the acl data to handle the problem of
5440                 * variable length bitmaps.*/
5441                res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5442                res->acl_len = attrlen;
5443
5444                /* Check for receive buffer overflow */
5445                if (res->acl_len > (xdr->nwords << 2) ||
5446                    res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5447                        res->acl_flags |= NFS4_ACL_TRUNC;
5448                        dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5449                                        attrlen, xdr->nwords << 2);
5450                }
5451        } else
5452                status = -EOPNOTSUPP;
5453
5454out:
5455        return status;
5456}
5457
5458static int
5459decode_savefh(struct xdr_stream *xdr)
5460{
5461        return decode_op_hdr(xdr, OP_SAVEFH);
5462}
5463
5464static int decode_setattr(struct xdr_stream *xdr)
5465{
5466        __be32 *p;
5467        uint32_t bmlen;
5468        int status;
5469
5470        status = decode_op_hdr(xdr, OP_SETATTR);
5471        if (status)
5472                return status;
5473        p = xdr_inline_decode(xdr, 4);
5474        if (unlikely(!p))
5475                goto out_overflow;
5476        bmlen = be32_to_cpup(p);
5477        p = xdr_inline_decode(xdr, bmlen << 2);
5478        if (likely(p))
5479                return 0;
5480out_overflow:
5481        print_overflow_msg(__func__, xdr);
5482        return -EIO;
5483}
5484
5485static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5486{
5487        __be32 *p;
5488        uint32_t opnum;
5489        int32_t nfserr;
5490
5491        p = xdr_inline_decode(xdr, 8);
5492        if (unlikely(!p))
5493                goto out_overflow;
5494        opnum = be32_to_cpup(p++);
5495        if (opnum != OP_SETCLIENTID) {
5496                dprintk("nfs: decode_setclientid: Server returned operation"
5497                        " %d\n", opnum);
5498                return -EIO;
5499        }
5500        nfserr = be32_to_cpup(p);
5501        if (nfserr == NFS_OK) {
5502                p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5503                if (unlikely(!p))
5504                        goto out_overflow;
5505                p = xdr_decode_hyper(p, &res->clientid);
5506                memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5507        } else if (nfserr == NFSERR_CLID_INUSE) {
5508                uint32_t len;
5509
5510                /* skip netid string */
5511                p = xdr_inline_decode(xdr, 4);
5512                if (unlikely(!p))
5513                        goto out_overflow;
5514                len = be32_to_cpup(p);
5515                p = xdr_inline_decode(xdr, len);
5516                if (unlikely(!p))
5517                        goto out_overflow;
5518
5519                /* skip uaddr string */
5520                p = xdr_inline_decode(xdr, 4);
5521                if (unlikely(!p))
5522                        goto out_overflow;
5523                len = be32_to_cpup(p);
5524                p = xdr_inline_decode(xdr, len);
5525                if (unlikely(!p))
5526                        goto out_overflow;
5527                return -NFSERR_CLID_INUSE;
5528        } else
5529                return nfs4_stat_to_errno(nfserr);
5530
5531        return 0;
5532out_overflow:
5533        print_overflow_msg(__func__, xdr);
5534        return -EIO;
5535}
5536
5537static int decode_setclientid_confirm(struct xdr_stream *xdr)
5538{
5539        return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5540}
5541
5542static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5543{
5544        __be32 *p;
5545        int status;
5546
5547        status = decode_op_hdr(xdr, OP_WRITE);
5548        if (status)
5549                return status;
5550
5551        p = xdr_inline_decode(xdr, 8);
5552        if (unlikely(!p))
5553                goto out_overflow;
5554        res->count = be32_to_cpup(p++);
5555        res->verf->committed = be32_to_cpup(p++);
5556        return decode_write_verifier(xdr, &res->verf->verifier);
5557out_overflow:
5558        print_overflow_msg(__func__, xdr);
5559        return -EIO;
5560}
5561
5562static int decode_delegreturn(struct xdr_stream *xdr)
5563{
5564        return decode_op_hdr(xdr, OP_DELEGRETURN);
5565}
5566
5567static int decode_secinfo_gss(struct xdr_stream *xdr,
5568                              struct nfs4_secinfo4 *flavor)
5569{
5570        u32 oid_len;
5571        __be32 *p;
5572
5573        p = xdr_inline_decode(xdr, 4);
5574        if (unlikely(!p))
5575                goto out_overflow;
5576        oid_len = be32_to_cpup(p);
5577        if (oid_len > GSS_OID_MAX_LEN)
5578                goto out_err;
5579
5580        p = xdr_inline_decode(xdr, oid_len);
5581        if (unlikely(!p))
5582                goto out_overflow;
5583        memcpy(flavor->flavor_info.oid.data, p, oid_len);
5584        flavor->flavor_info.oid.len = oid_len;
5585
5586        p = xdr_inline_decode(xdr, 8);
5587        if (unlikely(!p))
5588                goto out_overflow;
5589        flavor->flavor_info.qop = be32_to_cpup(p++);
5590        flavor->flavor_info.service = be32_to_cpup(p);
5591
5592        return 0;
5593
5594out_overflow:
5595        print_overflow_msg(__func__, xdr);
5596        return -EIO;
5597out_err:
5598        return -EINVAL;
5599}
5600
5601static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5602{
5603        struct nfs4_secinfo4 *sec_flavor;
5604        unsigned int i, num_flavors;
5605        int status;
5606        __be32 *p;
5607
5608        p = xdr_inline_decode(xdr, 4);
5609        if (unlikely(!p))
5610                goto out_overflow;
5611
5612        res->flavors->num_flavors = 0;
5613        num_flavors = be32_to_cpup(p);
5614
5615        for (i = 0; i < num_flavors; i++) {
5616                sec_flavor = &res->flavors->flavors[i];
5617                if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5618                        break;
5619
5620                p = xdr_inline_decode(xdr, 4);
5621                if (unlikely(!p))
5622                        goto out_overflow;
5623                sec_flavor->flavor = be32_to_cpup(p);
5624
5625                if (sec_flavor->flavor == RPC_AUTH_GSS) {
5626                        status = decode_secinfo_gss(xdr, sec_flavor);
5627                        if (status)
5628                                goto out;
5629                }
5630                res->flavors->num_flavors++;
5631        }
5632
5633        status = 0;
5634out:
5635        return status;
5636out_overflow:
5637        print_overflow_msg(__func__, xdr);
5638        return -EIO;
5639}
5640
5641static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5642{
5643        int status = decode_op_hdr(xdr, OP_SECINFO);
5644        if (status)
5645                return status;
5646        return decode_secinfo_common(xdr, res);
5647}
5648
5649#if defined(CONFIG_NFS_V4_1)
5650static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5651{
5652        int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5653        if (status)
5654                return status;
5655        return decode_secinfo_common(xdr, res);
5656}
5657
5658static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5659{
5660        __be32 *p;
5661        uint32_t bitmap_words;
5662        unsigned int i;
5663
5664        p = xdr_inline_decode(xdr, 4);
5665        if (!p)
5666                return -EIO;
5667        bitmap_words = be32_to_cpup(p++);
5668        if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5669                return -EIO;
5670        p = xdr_inline_decode(xdr, 4 * bitmap_words);
5671        for (i = 0; i < bitmap_words; i++)
5672                op_map->u.words[i] = be32_to_cpup(p++);
5673
5674        return 0;
5675}
5676
5677static int decode_exchange_id(struct xdr_stream *xdr,
5678                              struct nfs41_exchange_id_res *res)
5679{
5680        __be32 *p;
5681        uint32_t dummy;
5682        char *dummy_str;
5683        int status;
5684        uint32_t impl_id_count;
5685
5686        status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5687        if (status)
5688                return status;
5689
5690        p = xdr_inline_decode(xdr, 8);
5691        if (unlikely(!p))
5692                goto out_overflow;
5693        xdr_decode_hyper(p, &res->clientid);
5694        p = xdr_inline_decode(xdr, 12);
5695        if (unlikely(!p))
5696                goto out_overflow;
5697        res->seqid = be32_to_cpup(p++);
5698        res->flags = be32_to_cpup(p++);
5699
5700        res->state_protect.how = be32_to_cpup(p);
5701        switch (res->state_protect.how) {
5702        case SP4_NONE:
5703                break;
5704        case SP4_MACH_CRED:
5705                status = decode_op_map(xdr, &res->state_protect.enforce);
5706                if (status)
5707                        return status;
5708                status = decode_op_map(xdr, &res->state_protect.allow);
5709                if (status)
5710                        return status;
5711                break;
5712        default:
5713                WARN_ON_ONCE(1);
5714                return -EIO;
5715        }
5716
5717        /* server_owner4.so_minor_id */
5718        p = xdr_inline_decode(xdr, 8);
5719        if (unlikely(!p))
5720                goto out_overflow;
5721        p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5722
5723        /* server_owner4.so_major_id */
5724        status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5725        if (unlikely(status))
5726                return status;
5727        memcpy(res->server_owner->major_id, dummy_str, dummy);
5728        res->server_owner->major_id_sz = dummy;
5729
5730        /* server_scope4 */
5731        status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5732        if (unlikely(status))
5733                return status;
5734        memcpy(res->server_scope->server_scope, dummy_str, dummy);
5735        res->server_scope->server_scope_sz = dummy;
5736
5737        /* Implementation Id */
5738        p = xdr_inline_decode(xdr, 4);
5739        if (unlikely(!p))
5740                goto out_overflow;
5741        impl_id_count = be32_to_cpup(p++);
5742
5743        if (impl_id_count) {
5744                /* nii_domain */
5745                status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5746                if (unlikely(status))
5747                        return status;
5748                memcpy(res->impl_id->domain, dummy_str, dummy);
5749
5750                /* nii_name */
5751                status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5752                if (unlikely(status))
5753                        return status;
5754                memcpy(res->impl_id->name, dummy_str, dummy);
5755
5756                /* nii_date */
5757                p = xdr_inline_decode(xdr, 12);
5758                if (unlikely(!p))
5759                        goto out_overflow;
5760                p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5761                res->impl_id->date.nseconds = be32_to_cpup(p);
5762
5763                /* if there's more than one entry, ignore the rest */
5764        }
5765        return 0;
5766out_overflow:
5767        print_overflow_msg(__func__, xdr);
5768        return -EIO;
5769}
5770
5771static int decode_chan_attrs(struct xdr_stream *xdr,
5772                             struct nfs4_channel_attrs *attrs)
5773{
5774        __be32 *p;
5775        u32 nr_attrs, val;
5776
5777        p = xdr_inline_decode(xdr, 28);
5778        if (unlikely(!p))
5779                goto out_overflow;
5780        val = be32_to_cpup(p++);        /* headerpadsz */
5781        if (val)
5782                return -EINVAL;         /* no support for header padding yet */
5783        attrs->max_rqst_sz = be32_to_cpup(p++);
5784        attrs->max_resp_sz = be32_to_cpup(p++);
5785        attrs->max_resp_sz_cached = be32_to_cpup(p++);
5786        attrs->max_ops = be32_to_cpup(p++);
5787        attrs->max_reqs = be32_to_cpup(p++);
5788        nr_attrs = be32_to_cpup(p);
5789        if (unlikely(nr_attrs > 1)) {
5790                printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5791                        "count %u\n", __func__, nr_attrs);
5792                return -EINVAL;
5793        }
5794        if (nr_attrs == 1) {
5795                p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5796                if (unlikely(!p))
5797                        goto out_overflow;
5798        }
5799        return 0;
5800out_overflow:
5801        print_overflow_msg(__func__, xdr);
5802        return -EIO;
5803}
5804
5805static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5806{
5807        return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5808}
5809
5810static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5811                                struct nfs41_bind_conn_to_session_res *res)
5812{
5813        __be32 *p;
5814        int status;
5815
5816        status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5817        if (!status)
5818                status = decode_sessionid(xdr, &res->sessionid);
5819        if (unlikely(status))
5820                return status;
5821
5822        /* dir flags, rdma mode bool */
5823        p = xdr_inline_decode(xdr, 8);
5824        if (unlikely(!p))
5825                goto out_overflow;
5826
5827        res->dir = be32_to_cpup(p++);
5828        if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5829                return -EIO;
5830        if (be32_to_cpup(p) == 0)
5831                res->use_conn_in_rdma_mode = false;
5832        else
5833                res->use_conn_in_rdma_mode = true;
5834
5835        return 0;
5836out_overflow:
5837        print_overflow_msg(__func__, xdr);
5838        return -EIO;
5839}
5840
5841static int decode_create_session(struct xdr_stream *xdr,
5842                                 struct nfs41_create_session_res *res)
5843{
5844        __be32 *p;
5845        int status;
5846
5847        status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5848        if (!status)
5849                status = decode_sessionid(xdr, &res->sessionid);
5850        if (unlikely(status))
5851                return status;
5852
5853        /* seqid, flags */
5854        p = xdr_inline_decode(xdr, 8);
5855        if (unlikely(!p))
5856                goto out_overflow;
5857        res->seqid = be32_to_cpup(p++);
5858        res->flags = be32_to_cpup(p);
5859
5860        /* Channel attributes */
5861        status = decode_chan_attrs(xdr, &res->fc_attrs);
5862        if (!status)
5863                status = decode_chan_attrs(xdr, &res->bc_attrs);
5864        return status;
5865out_overflow:
5866        print_overflow_msg(__func__, xdr);
5867        return -EIO;
5868}
5869
5870static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5871{
5872        return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5873}
5874
5875static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5876{
5877        return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5878}
5879
5880static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5881{
5882        return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5883}
5884#endif /* CONFIG_NFS_V4_1 */
5885
5886static int decode_sequence(struct xdr_stream *xdr,
5887                           struct nfs4_sequence_res *res,
5888                           struct rpc_rqst *rqstp)
5889{
5890#if defined(CONFIG_NFS_V4_1)
5891        struct nfs4_session *session;
5892        struct nfs4_sessionid id;
5893        u32 dummy;
5894        int status;
5895        __be32 *p;
5896
5897        if (res->sr_slot == NULL)
5898                return 0;
5899        if (!res->sr_slot->table->session)
5900                return 0;
5901
5902        status = decode_op_hdr(xdr, OP_SEQUENCE);
5903        if (!status)
5904                status = decode_sessionid(xdr, &id);
5905        if (unlikely(status))
5906                goto out_err;
5907
5908        /*
5909         * If the server returns different values for sessionID, slotID or
5910         * sequence number, the server is looney tunes.
5911         */
5912        status = -EREMOTEIO;
5913        session = res->sr_slot->table->session;
5914
5915        if (memcmp(id.data, session->sess_id.data,
5916                   NFS4_MAX_SESSIONID_LEN)) {
5917                dprintk("%s Invalid session id\n", __func__);
5918                goto out_err;
5919        }
5920
5921        p = xdr_inline_decode(xdr, 20);
5922        if (unlikely(!p))
5923                goto out_overflow;
5924
5925        /* seqid */
5926        dummy = be32_to_cpup(p++);
5927        if (dummy != res->sr_slot->seq_nr) {
5928                dprintk("%s Invalid sequence number\n", __func__);
5929                goto out_err;
5930        }
5931        /* slot id */
5932        dummy = be32_to_cpup(p++);
5933        if (dummy != res->sr_slot->slot_nr) {
5934                dprintk("%s Invalid slot id\n", __func__);
5935                goto out_err;
5936        }
5937        /* highest slot id */
5938        res->sr_highest_slotid = be32_to_cpup(p++);
5939        /* target highest slot id */
5940        res->sr_target_highest_slotid = be32_to_cpup(p++);
5941        /* result flags */
5942        res->sr_status_flags = be32_to_cpup(p);
5943        status = 0;
5944out_err:
5945        res->sr_status = status;
5946        return status;
5947out_overflow:
5948        print_overflow_msg(__func__, xdr);
5949        status = -EIO;
5950        goto out_err;
5951#else  /* CONFIG_NFS_V4_1 */
5952        return 0;
5953#endif /* CONFIG_NFS_V4_1 */
5954}
5955
5956#if defined(CONFIG_NFS_V4_1)
5957static int decode_layout_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
5958{
5959        stateid->type = NFS4_LAYOUT_STATEID_TYPE;
5960        return decode_stateid(xdr, stateid);
5961}
5962
5963static int decode_getdeviceinfo(struct xdr_stream *xdr,
5964                                struct nfs4_getdeviceinfo_res *res)
5965{
5966        struct pnfs_device *pdev = res->pdev;
5967        __be32 *p;
5968        uint32_t len, type;
5969        int status;
5970
5971        status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5972        if (status) {
5973                if (status == -ETOOSMALL) {
5974                        p = xdr_inline_decode(xdr, 4);
5975                        if (unlikely(!p))
5976                                goto out_overflow;
5977                        pdev->mincount = be32_to_cpup(p);
5978                        dprintk("%s: Min count too small. mincnt = %u\n",
5979                                __func__, pdev->mincount);
5980                }
5981                return status;
5982        }
5983
5984        p = xdr_inline_decode(xdr, 8);
5985        if (unlikely(!p))
5986                goto out_overflow;
5987        type = be32_to_cpup(p++);
5988        if (type != pdev->layout_type) {
5989                dprintk("%s: layout mismatch req: %u pdev: %u\n",
5990                        __func__, pdev->layout_type, type);
5991                return -EINVAL;
5992        }
5993        /*
5994         * Get the length of the opaque device_addr4. xdr_read_pages places
5995         * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5996         * and places the remaining xdr data in xdr_buf->tail
5997         */
5998        pdev->mincount = be32_to_cpup(p);
5999        if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
6000                goto out_overflow;

6001
6002        /* Parse notification bitmap, verifying that it is zero. */
6003        p = xdr_inline_decode(xdr, 4);
6004        if (unlikely(!p))
6005                goto out_overflow;
6006        len = be32_to_cpup(p);
6007        if (len) {
6008                uint32_t i;
6009
6010                p = xdr_inline_decode(xdr, 4 * len);
6011                if (unlikely(!p))
6012                        goto out_overflow;
6013
6014                res->notification = be32_to_cpup(p++);
6015                for (i = 1; i < len; i++) {
6016                        if (be32_to_cpup(p++)) {
6017                                dprintk("%s: unsupported notification\n",
6018                                        __func__);
6019                                return -EIO;
6020                        }
6021                }
6022        }
6023        return 0;
6024out_overflow:
6025        print_overflow_msg(__func__, xdr);
6026        return -EIO;
6027}
6028
6029static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
6030                            struct nfs4_layoutget_res *res)
6031{
6032        __be32 *p;
6033        int status;
6034        u32 layout_count;
6035        u32 recvd;
6036
6037        status = decode_op_hdr(xdr, OP_LAYOUTGET);
6038        if (status)
6039                return status;
6040        p = xdr_inline_decode(xdr, 4);
6041        if (unlikely(!p))
6042                goto out_overflow;
6043        res->return_on_close = be32_to_cpup(p);
6044        decode_layout_stateid(xdr, &res->stateid);
6045        p = xdr_inline_decode(xdr, 4);
6046        if (unlikely(!p))
6047                goto out_overflow;
6048        layout_count = be32_to_cpup(p);
6049        if (!layout_count) {
6050                dprintk("%s: server responded with empty layout array\n",
6051                        __func__);
6052                return -EINVAL;
6053        }
6054
6055        p = xdr_inline_decode(xdr, 28);
6056        if (unlikely(!p))
6057                goto out_overflow;
6058        p = xdr_decode_hyper(p, &res->range.offset);
6059        p = xdr_decode_hyper(p, &res->range.length);
6060        res->range.iomode = be32_to_cpup(p++);
6061        res->type = be32_to_cpup(p++);
6062        res->layoutp->len = be32_to_cpup(p);
6063
6064        dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
6065                __func__,
6066                (unsigned long)res->range.offset,
6067                (unsigned long)res->range.length,
6068                res->range.iomode,
6069                res->type,
6070                res->layoutp->len);
6071
6072        recvd = xdr_read_pages(xdr, res->layoutp->len);
6073        if (res->layoutp->len > recvd) {
6074                dprintk("NFS: server cheating in layoutget reply: "
6075                                "layout len %u > recvd %u\n",
6076                                res->layoutp->len, recvd);
6077                return -EINVAL;
6078        }
6079
6080        if (layout_count > 1) {
6081                /* We only handle a length one array at the moment.  Any
6082                 * further entries are just ignored.  Note that this means
6083                 * the client may see a response that is less than the
6084                 * minimum it requested.
6085                 */
6086                dprintk("%s: server responded with %d layouts, dropping tail\n",
6087                        __func__, layout_count);
6088        }
6089
6090        return 0;
6091out_overflow:
6092        print_overflow_msg(__func__, xdr);
6093        return -EIO;
6094}
6095
6096static int decode_layoutreturn(struct xdr_stream *xdr,
6097                               struct nfs4_layoutreturn_res *res)
6098{
6099        __be32 *p;
6100        int status;
6101
6102        status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
6103        if (status)
6104                return status;
6105        p = xdr_inline_decode(xdr, 4);
6106        if (unlikely(!p))
6107                goto out_overflow;
6108        res->lrs_present = be32_to_cpup(p);
6109        if (res->lrs_present)
6110                status = decode_layout_stateid(xdr, &res->stateid);
6111        return status;
6112out_overflow:
6113        print_overflow_msg(__func__, xdr);
6114        return -EIO;
6115}
6116
6117static int decode_layoutcommit(struct xdr_stream *xdr,
6118                               struct rpc_rqst *req,
6119                               struct nfs4_layoutcommit_res *res)
6120{
6121        __be32 *p;
6122        __u32 sizechanged;
6123        int status;
6124
6125        status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
6126        res->status = status;
6127        if (status)
6128                return status;
6129
6130        p = xdr_inline_decode(xdr, 4);
6131        if (unlikely(!p))
6132                goto out_overflow;
6133        sizechanged = be32_to_cpup(p);
6134
6135        if (sizechanged) {
6136                /* throw away new size */
6137                p = xdr_inline_decode(xdr, 8);
6138                if (unlikely(!p))
6139                        goto out_overflow;
6140        }
6141        return 0;
6142out_overflow:
6143        print_overflow_msg(__func__, xdr);
6144        return -EIO;
6145}
6146
6147static int decode_test_stateid(struct xdr_stream *xdr,
6148                               struct nfs41_test_stateid_res *res)
6149{
6150        __be32 *p;
6151        int status;
6152        int num_res;
6153
6154        status = decode_op_hdr(xdr, OP_TEST_STATEID);
6155        if (status)
6156                return status;
6157
6158        p = xdr_inline_decode(xdr, 4);
6159        if (unlikely(!p))
6160                goto out_overflow;
6161        num_res = be32_to_cpup(p++);
6162        if (num_res != 1)
6163                goto out;
6164
6165        p = xdr_inline_decode(xdr, 4);
6166        if (unlikely(!p))
6167                goto out_overflow;
6168        res->status = be32_to_cpup(p++);
6169
6170        return status;
6171out_overflow:
6172        print_overflow_msg(__func__, xdr);
6173out:
6174        return -EIO;
6175}
6176
6177static int decode_free_stateid(struct xdr_stream *xdr,
6178                               struct nfs41_free_stateid_res *res)
6179{
6180        res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
6181        return res->status;
6182}
6183#else
6184static inline
6185int decode_layoutreturn(struct xdr_stream *xdr,
6186                               struct nfs4_layoutreturn_res *res)
6187{
6188        return 0;
6189}
6190#endif /* CONFIG_NFS_V4_1 */
6191
6192/*
6193 * END OF "GENERIC" DECODE ROUTINES.
6194 */
6195
6196/*
6197 * Decode OPEN_DOWNGRADE response
6198 */
6199static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
6200                                       struct xdr_stream *xdr,
6201                                       void *data)
6202{
6203        struct nfs_closeres *res = data;
6204        struct compound_hdr hdr;
6205        int status;
6206
6207        status = decode_compound_hdr(xdr, &hdr);
6208        if (status)
6209                goto out;
6210        status = decode_sequence(xdr, &res->seq_res, rqstp);
6211        if (status)
6212                goto out;
6213        status = decode_putfh(xdr);
6214        if (status)
6215                goto out;
6216        if (res->lr_res) {
6217                status = decode_layoutreturn(xdr, res->lr_res);
6218                res->lr_ret = status;
6219                if (status)
6220                        goto out;
6221        }
6222        status = decode_open_downgrade(xdr, res);
6223out:
6224        return status;
6225}
6226
6227/*
6228 * Decode ACCESS response
6229 */
6230static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6231                               void *data)
6232{
6233        struct nfs4_accessres *res = data;
6234        struct compound_hdr hdr;
6235        int status;
6236
6237        status = decode_compound_hdr(xdr, &hdr);
6238        if (status)
6239                goto out;
6240        status = decode_sequence(xdr, &res->seq_res, rqstp);
6241        if (status)
6242                goto out;
6243        status = decode_putfh(xdr);
6244        if (status != 0)
6245                goto out;
6246        status = decode_access(xdr, &res->supported, &res->access);
6247        if (status != 0)
6248                goto out;
6249        decode_getfattr(xdr, res->fattr, res->server);
6250out:
6251        return status;
6252}
6253
6254/*
6255 * Decode LOOKUP response
6256 */
6257static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6258                               void *data)
6259{
6260        struct nfs4_lookup_res *res = data;
6261        struct compound_hdr hdr;
6262        int status;
6263
6264        status = decode_compound_hdr(xdr, &hdr);
6265        if (status)
6266                goto out;
6267        status = decode_sequence(xdr, &res->seq_res, rqstp);
6268        if (status)
6269                goto out;
6270        status = decode_putfh(xdr);
6271        if (status)
6272                goto out;
6273        status = decode_lookup(xdr);
6274        if (status)
6275                goto out;
6276        status = decode_getfh(xdr, res->fh);
6277        if (status)
6278                goto out;
6279        status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6280out:
6281        return status;
6282}
6283
6284/*
6285 * Decode LOOKUPP response
6286 */
6287static int nfs4_xdr_dec_lookupp(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6288                void *data)
6289{
6290        struct nfs4_lookupp_res *res = data;
6291        struct compound_hdr hdr;
6292        int status;
6293
6294        status = decode_compound_hdr(xdr, &hdr);
6295        if (status)
6296                goto out;
6297        status = decode_sequence(xdr, &res->seq_res, rqstp);
6298        if (status)
6299                goto out;
6300        status = decode_putfh(xdr);
6301        if (status)
6302                goto out;
6303        status = decode_lookupp(xdr);
6304        if (status)
6305                goto out;
6306        status = decode_getfh(xdr, res->fh);
6307        if (status)
6308                goto out;
6309        status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6310out:
6311        return status;
6312}
6313
6314/*
6315 * Decode LOOKUP_ROOT response
6316 */
6317static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6318                                    struct xdr_stream *xdr,
6319                                    void *data)
6320{
6321        struct nfs4_lookup_res *res = data;
6322        struct compound_hdr hdr;
6323        int status;
6324
6325        status = decode_compound_hdr(xdr, &hdr);
6326        if (status)
6327                goto out;
6328        status = decode_sequence(xdr, &res->seq_res, rqstp);
6329        if (status)
6330                goto out;
6331        status = decode_putrootfh(xdr);
6332        if (status)
6333                goto out;
6334        status = decode_getfh(xdr, res->fh);
6335        if (status == 0)
6336                status = decode_getfattr_label(xdr, res->fattr,
6337                                                res->label, res->server);
6338out:
6339        return status;
6340}
6341
6342/*
6343 * Decode REMOVE response
6344 */
6345static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6346                               void *data)
6347{
6348        struct nfs_removeres *res = data;
6349        struct compound_hdr hdr;
6350        int status;
6351
6352        status = decode_compound_hdr(xdr, &hdr);
6353        if (status)
6354                goto out;
6355        status = decode_sequence(xdr, &res->seq_res, rqstp);
6356        if (status)
6357                goto out;
6358        status = decode_putfh(xdr);
6359        if (status)
6360                goto out;
6361        status = decode_remove(xdr, &res->cinfo);
6362out:
6363        return status;
6364}
6365
6366/*
6367 * Decode RENAME response
6368 */
6369static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6370                               void *data)
6371{
6372        struct nfs_renameres *res = data;
6373        struct compound_hdr hdr;
6374        int status;
6375
6376        status = decode_compound_hdr(xdr, &hdr);
6377        if (status)
6378                goto out;
6379        status = decode_sequence(xdr, &res->seq_res, rqstp);
6380        if (status)
6381                goto out;
6382        status = decode_putfh(xdr);
6383        if (status)
6384                goto out;
6385        status = decode_savefh(xdr);
6386        if (status)
6387                goto out;
6388        status = decode_putfh(xdr);
6389        if (status)
6390                goto out;
6391        status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6392out:
6393        return status;
6394}
6395
6396/*
6397 * Decode LINK response
6398 */
6399static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6400                             void *data)
6401{
6402        struct nfs4_link_res *res = data;
6403        struct compound_hdr hdr;
6404        int status;
6405
6406        status = decode_compound_hdr(xdr, &hdr);
6407        if (status)
6408                goto out;
6409        status = decode_sequence(xdr, &res->seq_res, rqstp);
6410        if (status)
6411                goto out;
6412        status = decode_putfh(xdr);
6413        if (status)
6414                goto out;
6415        status = decode_savefh(xdr);
6416        if (status)
6417                goto out;
6418        status = decode_putfh(xdr);
6419        if (status)
6420                goto out;
6421        status = decode_link(xdr, &res->cinfo);
6422        if (status)
6423                goto out;
6424        /*
6425         * Note order: OP_LINK leaves the directory as the current
6426         *             filehandle.
6427         */
6428        status = decode_restorefh(xdr);
6429        if (status)
6430                goto out;
6431        decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6432out:
6433        return status;
6434}
6435
6436/*
6437 * Decode CREATE response
6438 */
6439static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6440                               void *data)
6441{
6442        struct nfs4_create_res *res = data;
6443        struct compound_hdr hdr;
6444        int status;
6445
6446        status = decode_compound_hdr(xdr, &hdr);
6447        if (status)
6448                goto out;
6449        status = decode_sequence(xdr, &res->seq_res, rqstp);
6450        if (status)
6451                goto out;
6452        status = decode_putfh(xdr);
6453        if (status)
6454                goto out;
6455        status = decode_create(xdr, &res->dir_cinfo);
6456        if (status)
6457                goto out;
6458        status = decode_getfh(xdr, res->fh);
6459        if (status)
6460                goto out;
6461        decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6462out:
6463        return status;
6464}
6465
6466/*
6467 * Decode SYMLINK response
6468 */
6469static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6470                                void *res)
6471{
6472        return nfs4_xdr_dec_create(rqstp, xdr, res);
6473}
6474
6475/*
6476 * Decode GETATTR response
6477 */
6478static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6479                                void *data)
6480{
6481        struct nfs4_getattr_res *res = data;
6482        struct compound_hdr hdr;
6483        int status;
6484
6485        status = decode_compound_hdr(xdr, &hdr);
6486        if (status)
6487                goto out;
6488        status = decode_sequence(xdr, &res->seq_res, rqstp);
6489        if (status)
6490                goto out;
6491        status = decode_putfh(xdr);
6492        if (status)
6493                goto out;
6494        status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6495out:
6496        return status;
6497}
6498
6499/*
6500 * Encode an SETACL request
6501 */
6502static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6503                                const void *data)
6504{
6505        const struct nfs_setaclargs *args = data;
6506        struct compound_hdr hdr = {
6507                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6508        };
6509
6510        encode_compound_hdr(xdr, req, &hdr);
6511        encode_sequence(xdr, &args->seq_args, &hdr);
6512        encode_putfh(xdr, args->fh, &hdr);
6513        encode_setacl(xdr, args, &hdr);
6514        encode_nops(&hdr);
6515}
6516
6517/*
6518 * Decode SETACL response
6519 */
6520static int
6521nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6522                    void *data)
6523{
6524        struct nfs_setaclres *res = data;
6525        struct compound_hdr hdr;
6526        int status;
6527
6528        status = decode_compound_hdr(xdr, &hdr);
6529        if (status)
6530                goto out;
6531        status = decode_sequence(xdr, &res->seq_res, rqstp);
6532        if (status)
6533                goto out;
6534        status = decode_putfh(xdr);
6535        if (status)
6536                goto out;
6537        status = decode_setattr(xdr);
6538out:
6539        return status;
6540}
6541
6542/*
6543 * Decode GETACL response
6544 */
6545static int
6546nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6547                    void *data)
6548{
6549        struct nfs_getaclres *res = data;
6550        struct compound_hdr hdr;
6551        int status;
6552
6553        if (res->acl_scratch != NULL) {
6554                void *p = page_address(res->acl_scratch);
6555                xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6556        }
6557        status = decode_compound_hdr(xdr, &hdr);
6558        if (status)
6559                goto out;
6560        status = decode_sequence(xdr, &res->seq_res, rqstp);
6561        if (status)
6562                goto out;
6563        status = decode_putfh(xdr);
6564        if (status)
6565                goto out;
6566        status = decode_getacl(xdr, rqstp, res);
6567
6568out:
6569        return status;
6570}
6571
6572/*
6573 * Decode CLOSE response
6574 */
6575static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6576                              void *data)
6577{
6578        struct nfs_closeres *res = data;
6579        struct compound_hdr hdr;
6580        int status;
6581
6582        status = decode_compound_hdr(xdr, &hdr);
6583        if (status)
6584                goto out;
6585        status = decode_sequence(xdr, &res->seq_res, rqstp);
6586        if (status)
6587                goto out;
6588        status = decode_putfh(xdr);
6589        if (status)
6590                goto out;
6591        if (res->lr_res) {
6592                status = decode_layoutreturn(xdr, res->lr_res);
6593                res->lr_ret = status;
6594                if (status)
6595                        goto out;
6596        }
6597        if (res->fattr != NULL) {
6598                status = decode_getfattr(xdr, res->fattr, res->server);
6599                if (status != 0)
6600                        goto out;
6601        }
6602        status = decode_close(xdr, res);
6603out:
6604        return status;
6605}
6606
6607/*
6608 * Decode OPEN response
6609 */
6610static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6611                             void *data)
6612{
6613        struct nfs_openres *res = data;
6614        struct compound_hdr hdr;
6615        int status;
6616
6617        status = decode_compound_hdr(xdr, &hdr);
6618        if (status)
6619                goto out;
6620        status = decode_sequence(xdr, &res->seq_res, rqstp);
6621        if (status)
6622                goto out;
6623        status = decode_putfh(xdr);
6624        if (status)
6625                goto out;
6626        status = decode_open(xdr, res);
6627        if (status)
6628                goto out;
6629        status = decode_getfh(xdr, &res->fh);
6630        if (status)
6631                goto out;
6632        if (res->access_request)
6633                decode_access(xdr, &res->access_supported, &res->access_result);
6634        decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6635out:
6636        return status;
6637}
6638
6639/*
6640 * Decode OPEN_CONFIRM response
6641 */
6642static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6643                                     struct xdr_stream *xdr,
6644                                     void *data)
6645{
6646        struct nfs_open_confirmres *res = data;
6647        struct compound_hdr hdr;
6648        int status;
6649
6650        status = decode_compound_hdr(xdr, &hdr);
6651        if (status)
6652                goto out;
6653        status = decode_putfh(xdr);
6654        if (status)
6655                goto out;
6656        status = decode_open_confirm(xdr, res);
6657out:
6658        return status;
6659}
6660
6661/*
6662 * Decode OPEN response
6663 */
6664static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6665                                    struct xdr_stream *xdr,
6666                                    void *data)
6667{
6668        struct nfs_openres *res = data;
6669        struct compound_hdr hdr;
6670        int status;
6671
6672        status = decode_compound_hdr(xdr, &hdr);
6673        if (status)
6674                goto out;
6675        status = decode_sequence(xdr, &res->seq_res, rqstp);
6676        if (status)
6677                goto out;
6678        status = decode_putfh(xdr);
6679        if (status)
6680                goto out;
6681        status = decode_open(xdr, res);
6682        if (status)
6683                goto out;
6684        if (res->access_request)
6685                decode_access(xdr, &res->access_supported, &res->access_result);
6686        decode_getfattr(xdr, res->f_attr, res->server);
6687out:
6688        return status;
6689}
6690
6691/*
6692 * Decode SETATTR response
6693 */
6694static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6695                                struct xdr_stream *xdr,
6696                                void *data)
6697{
6698        struct nfs_setattrres *res = data;
6699        struct compound_hdr hdr;
6700        int status;
6701
6702        status = decode_compound_hdr(xdr, &hdr);
6703        if (status)
6704                goto out;
6705        status = decode_sequence(xdr, &res->seq_res, rqstp);
6706        if (status)
6707                goto out;
6708        status = decode_putfh(xdr);
6709        if (status)
6710                goto out;
6711        status = decode_setattr(xdr);
6712        if (status)
6713                goto out;
6714        decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6715out:
6716        return status;
6717}
6718
6719/*
6720 * Decode LOCK response
6721 */
6722static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6723                             void *data)
6724{
6725        struct nfs_lock_res *res = data;
6726        struct compound_hdr hdr;
6727        int status;
6728
6729        status = decode_compound_hdr(xdr, &hdr);
6730        if (status)
6731                goto out;
6732        status = decode_sequence(xdr, &res->seq_res, rqstp);
6733        if (status)
6734                goto out;
6735        status = decode_putfh(xdr);
6736        if (status)
6737                goto out;
6738        status = decode_lock(xdr, res);
6739out:
6740        return status;
6741}
6742
6743/*
6744 * Decode LOCKT response
6745 */
6746static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6747                              void *data)
6748{
6749        struct nfs_lockt_res *res = data;
6750        struct compound_hdr hdr;
6751        int status;
6752
6753        status = decode_compound_hdr(xdr, &hdr);
6754        if (status)
6755                goto out;
6756        status = decode_sequence(xdr, &res->seq_res, rqstp);
6757        if (status)
6758                goto out;
6759        status = decode_putfh(xdr);
6760        if (status)
6761                goto out;
6762        status = decode_lockt(xdr, res);
6763out:
6764        return status;
6765}
6766
6767/*
6768 * Decode LOCKU response
6769 */
6770static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6771                              void *data)
6772{
6773        struct nfs_locku_res *res = data;
6774        struct compound_hdr hdr;
6775        int status;
6776
6777        status = decode_compound_hdr(xdr, &hdr);
6778        if (status)
6779                goto out;
6780        status = decode_sequence(xdr, &res->seq_res, rqstp);
6781        if (status)
6782                goto out;
6783        status = decode_putfh(xdr);
6784        if (status)
6785                goto out;
6786        status = decode_locku(xdr, res);
6787out:
6788        return status;
6789}
6790
6791static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6792                                          struct xdr_stream *xdr, void *dummy)
6793{
6794        struct compound_hdr hdr;
6795        int status;
6796
6797        status = decode_compound_hdr(xdr, &hdr);
6798        if (!status)
6799                status = decode_release_lockowner(xdr);
6800        return status;
6801}
6802
6803/*
6804 * Decode READLINK response
6805 */
6806static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6807                                 struct xdr_stream *xdr,
6808                                 void *data)
6809{
6810        struct nfs4_readlink_res *res = data;
6811        struct compound_hdr hdr;
6812        int status;
6813
6814        status = decode_compound_hdr(xdr, &hdr);
6815        if (status)
6816                goto out;
6817        status = decode_sequence(xdr, &res->seq_res, rqstp);
6818        if (status)
6819                goto out;
6820        status = decode_putfh(xdr);
6821        if (status)
6822                goto out;
6823        status = decode_readlink(xdr, rqstp);
6824out:
6825        return status;
6826}
6827
6828/*
6829 * Decode READDIR response
6830 */
6831static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6832                                void *data)
6833{
6834        struct nfs4_readdir_res *res = data;
6835        struct compound_hdr hdr;
6836        int status;
6837
6838        status = decode_compound_hdr(xdr, &hdr);
6839        if (status)
6840                goto out;
6841        status = decode_sequence(xdr, &res->seq_res, rqstp);
6842        if (status)
6843                goto out;
6844        status = decode_putfh(xdr);
6845        if (status)
6846                goto out;
6847        status = decode_readdir(xdr, rqstp, res);
6848out:
6849        return status;
6850}
6851
6852/*
6853 * Decode Read response
6854 */
6855static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6856                             void *data)
6857{
6858        struct nfs_pgio_res *res = data;
6859        struct compound_hdr hdr;
6860        int status;
6861
6862        status = decode_compound_hdr(xdr, &hdr);
6863        res->op_status = hdr.status;
6864        if (status)
6865                goto out;
6866        status = decode_sequence(xdr, &res->seq_res, rqstp);
6867        if (status)
6868                goto out;
6869        status = decode_putfh(xdr);
6870        if (status)
6871                goto out;
6872        status = decode_read(xdr, rqstp, res);
6873        if (!status)
6874                status = res->count;
6875out:
6876        return status;
6877}
6878
6879/*
6880 * Decode WRITE response
6881 */
6882static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6883                              void *data)
6884{
6885        struct nfs_pgio_res *res = data;
6886        struct compound_hdr hdr;
6887        int status;
6888
6889        status = decode_compound_hdr(xdr, &hdr);
6890        res->op_status = hdr.status;
6891        if (status)
6892                goto out;
6893        status = decode_sequence(xdr, &res->seq_res, rqstp);
6894        if (status)
6895                goto out;
6896        status = decode_putfh(xdr);
6897        if (status)
6898                goto out;
6899        status = decode_write(xdr, res);
6900        if (status)
6901                goto out;
6902        if (res->fattr)
6903                decode_getfattr(xdr, res->fattr, res->server);
6904        if (!status)
6905                status = res->count;
6906out:
6907        return status;
6908}
6909
6910/*
6911 * Decode COMMIT response
6912 */
6913static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6914                               void *data)
6915{
6916        struct nfs_commitres *res = data;
6917        struct compound_hdr hdr;
6918        int status;
6919
6920        status = decode_compound_hdr(xdr, &hdr);
6921        res->op_status = hdr.status;
6922        if (status)
6923                goto out;
6924        status = decode_sequence(xdr, &res->seq_res, rqstp);
6925        if (status)
6926                goto out;
6927        status = decode_putfh(xdr);
6928        if (status)
6929                goto out;
6930        status = decode_commit(xdr, res);
6931out:
6932        return status;
6933}
6934
6935/*
6936 * Decode FSINFO response
6937 */
6938static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6939                               void *data)
6940{
6941        struct nfs4_fsinfo_res *res = data;
6942        struct compound_hdr hdr;
6943        int status;
6944
6945        status = decode_compound_hdr(xdr, &hdr);
6946        if (!status)
6947                status = decode_sequence(xdr, &res->seq_res, req);
6948        if (!status)
6949                status = decode_putfh(xdr);
6950        if (!status)
6951                status = decode_fsinfo(xdr, res->fsinfo);
6952        return status;
6953}
6954
6955/*
6956 * Decode PATHCONF response
6957 */
6958static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6959                                 void *data)
6960{
6961        struct nfs4_pathconf_res *res = data;
6962        struct compound_hdr hdr;
6963        int status;
6964
6965        status = decode_compound_hdr(xdr, &hdr);
6966        if (!status)
6967                status = decode_sequence(xdr, &res->seq_res, req);
6968        if (!status)
6969                status = decode_putfh(xdr);
6970        if (!status)
6971                status = decode_pathconf(xdr, res->pathconf);
6972        return status;
6973}
6974
6975/*
6976 * Decode STATFS response
6977 */
6978static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6979                               void *data)
6980{
6981        struct nfs4_statfs_res *res = data;
6982        struct compound_hdr hdr;
6983        int status;
6984
6985        status = decode_compound_hdr(xdr, &hdr);
6986        if (!status)
6987                status = decode_sequence(xdr, &res->seq_res, req);
6988        if (!status)
6989                status = decode_putfh(xdr);
6990        if (!status)
6991                status = decode_statfs(xdr, res->fsstat);
6992        return status;
6993}
6994
6995/*
6996 * Decode GETATTR_BITMAP response
6997 */
6998static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6999                                    struct xdr_stream *xdr,
7000                                    void *data)

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