LXR linux/fs/nfs/nfs4xdr.c

   1/*
   2 *  fs/nfs/nfs4xdr.c
   3 *
   4 *  Client-side XDR for NFSv4.
   5 *
   6 *  Copyright (c) 2002 The Regents of the University of Michigan.
   7 *  All rights reserved.
   8 *
   9 *  Kendrick Smith <kmsmith@umich.edu>
  10 *  Andy Adamson   <andros@umich.edu>
  11 *
  12 *  Redistribution and use in source and binary forms, with or without
  13 *  modification, are permitted provided that the following conditions
  14 *  are met:
  15 *
  16 *  1. Redistributions of source code must retain the above copyright
  17 *     notice, this list of conditions and the following disclaimer.
  18 *  2. Redistributions in binary form must reproduce the above copyright
  19 *     notice, this list of conditions and the following disclaimer in the
  20 *     documentation and/or other materials provided with the distribution.
  21 *  3. Neither the name of the University nor the names of its
  22 *     contributors may be used to endorse or promote products derived
  23 *     from this software without specific prior written permission.
  24 *
  25 *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  26 *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  27 *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  28 *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  29 *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30 *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31 *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  32 *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  33 *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  34 *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  35 *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36 */
  37
  38#include <linux/param.h>
  39#include <linux/time.h>
  40#include <linux/mm.h>
  41#include <linux/errno.h>
  42#include <linux/string.h>
  43#include <linux/in.h>
  44#include <linux/pagemap.h>
  45#include <linux/proc_fs.h>
  46#include <linux/kdev_t.h>
  47#include <linux/module.h>
  48#include <linux/utsname.h>
  49#include <linux/sunrpc/clnt.h>
  50#include <linux/sunrpc/msg_prot.h>
  51#include <linux/sunrpc/gss_api.h>
  52#include <linux/nfs.h>
  53#include <linux/nfs4.h>
  54#include <linux/nfs_fs.h>
  55
  56#include "nfs4_fs.h"
  57#include "internal.h"
  58#include "nfs4idmap.h"
  59#include "nfs4session.h"
  60#include "pnfs.h"
  61#include "netns.h"
  62
  63#define NFSDBG_FACILITY         NFSDBG_XDR
  64
  65/* Mapping from NFS error code to "errno" error code. */
  66#define errno_NFSERR_IO         EIO
  67
  68static int nfs4_stat_to_errno(int);
  69
  70/* NFSv4 COMPOUND tags are only wanted for debugging purposes */
  71#ifdef DEBUG
  72#define NFS4_MAXTAGLEN          20
  73#else
  74#define NFS4_MAXTAGLEN          0
  75#endif
  76
  77/* lock,open owner id:
  78 * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT  >> 2)
  79 */
  80#define open_owner_id_maxsz     (1 + 2 + 1 + 1 + 2)
  81#define lock_owner_id_maxsz     (1 + 1 + 4)
  82#define decode_lockowner_maxsz  (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  83#define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  84#define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  85#define op_encode_hdr_maxsz     (1)
  86#define op_decode_hdr_maxsz     (2)
  87#define encode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  88#define decode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  89#define encode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  90#define decode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  91#define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
  92                                (NFS4_FHSIZE >> 2))
  93#define decode_putfh_maxsz      (op_decode_hdr_maxsz)
  94#define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
  95#define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
  96#define encode_getfh_maxsz      (op_encode_hdr_maxsz)
  97#define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
  98                                ((3+NFS4_FHSIZE) >> 2))
  99#define nfs4_fattr_bitmap_maxsz 4
 100#define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
 101#define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
 102#define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
 103#define nfs4_owner_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 104#define nfs4_group_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 105#ifdef CONFIG_NFS_V4_SECURITY_LABEL
 106/* PI(4 bytes) + LFS(4 bytes) + 1(for null terminator?) + MAXLABELLEN */
 107#define nfs4_label_maxsz        (4 + 4 + 1 + XDR_QUADLEN(NFS4_MAXLABELLEN))
 108#else
 109#define nfs4_label_maxsz        0
 110#endif
 111/* We support only one layout type per file system */
 112#define decode_mdsthreshold_maxsz (1 + 1 + nfs4_fattr_bitmap_maxsz + 1 + 8)
 113/* This is based on getfattr, which uses the most attributes: */
 114#define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
 115                                3 + 3 + 3 + nfs4_owner_maxsz + \
 116                                nfs4_group_maxsz + nfs4_label_maxsz + \
 117                                 decode_mdsthreshold_maxsz))
 118#define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
 119                                nfs4_fattr_value_maxsz)
 120#define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
 121#define encode_attrs_maxsz      (nfs4_fattr_bitmap_maxsz + \
 122                                 1 + 2 + 1 + \
 123                                nfs4_owner_maxsz + \
 124                                nfs4_group_maxsz + \
 125                                nfs4_label_maxsz + \
 126                                4 + 4)
 127#define encode_savefh_maxsz     (op_encode_hdr_maxsz)
 128#define decode_savefh_maxsz     (op_decode_hdr_maxsz)
 129#define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
 130#define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 131#define encode_fsinfo_maxsz     (encode_getattr_maxsz)
 132/* The 5 accounts for the PNFS attributes, and assumes that at most three
 133 * layout types will be returned.
 134 */
 135#define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + \
 136                                 nfs4_fattr_bitmap_maxsz + 4 + 8 + 5)
 137#define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 138#define decode_renew_maxsz      (op_decode_hdr_maxsz)
 139#define encode_setclientid_maxsz \
 140                                (op_encode_hdr_maxsz + \
 141                                XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 142                                XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
 143                                1 /* sc_prog */ + \
 144                                1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 145                                1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
 146                                1) /* sc_cb_ident */
 147#define decode_setclientid_maxsz \
 148                                (op_decode_hdr_maxsz + \
 149                                2 /* clientid */ + \
 150                                XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 151                                1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 152                                1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN))
 153#define encode_setclientid_confirm_maxsz \
 154                                (op_encode_hdr_maxsz + \
 155                                3 + (NFS4_VERIFIER_SIZE >> 2))
 156#define decode_setclientid_confirm_maxsz \
 157                                (op_decode_hdr_maxsz)
 158#define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
 159#define decode_lookup_maxsz     (op_decode_hdr_maxsz)
 160#define encode_share_access_maxsz \
 161                                (2)
 162#define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
 163#define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
 164#define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
 165#define encode_open_maxsz       (op_encode_hdr_maxsz + \
 166                                2 + encode_share_access_maxsz + 2 + \
 167                                open_owner_id_maxsz + \
 168                                encode_opentype_maxsz + \
 169                                encode_claim_null_maxsz)
 170#define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
 171#define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
 172                                decode_ace_maxsz)
 173#define decode_change_info_maxsz        (5)
 174#define decode_open_maxsz       (op_decode_hdr_maxsz + \
 175                                decode_stateid_maxsz + \
 176                                decode_change_info_maxsz + 1 + \
 177                                nfs4_fattr_bitmap_maxsz + \
 178                                decode_delegation_maxsz)
 179#define encode_open_confirm_maxsz \
 180                                (op_encode_hdr_maxsz + \
 181                                 encode_stateid_maxsz + 1)
 182#define decode_open_confirm_maxsz \
 183                                (op_decode_hdr_maxsz + \
 184                                 decode_stateid_maxsz)
 185#define encode_open_downgrade_maxsz \
 186                                (op_encode_hdr_maxsz + \
 187                                 encode_stateid_maxsz + 1 + \
 188                                 encode_share_access_maxsz)
 189#define decode_open_downgrade_maxsz \
 190                                (op_decode_hdr_maxsz + \
 191                                 decode_stateid_maxsz)
 192#define encode_close_maxsz      (op_encode_hdr_maxsz + \
 193                                 1 + encode_stateid_maxsz)
 194#define decode_close_maxsz      (op_decode_hdr_maxsz + \
 195                                 decode_stateid_maxsz)
 196#define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
 197                                 encode_stateid_maxsz + \
 198                                 encode_attrs_maxsz)
 199#define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
 200                                 nfs4_fattr_bitmap_maxsz)
 201#define encode_read_maxsz       (op_encode_hdr_maxsz + \
 202                                 encode_stateid_maxsz + 3)
 203#define decode_read_maxsz       (op_decode_hdr_maxsz + 2)
 204#define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
 205                                 2 + encode_verifier_maxsz + 5 + \
 206                                nfs4_label_maxsz)
 207#define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
 208                                 decode_verifier_maxsz)
 209#define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 210#define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1)
 211#define encode_write_maxsz      (op_encode_hdr_maxsz + \
 212                                 encode_stateid_maxsz + 4)
 213#define decode_write_maxsz      (op_decode_hdr_maxsz + \
 214                                 2 + decode_verifier_maxsz)
 215#define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
 216#define decode_commit_maxsz     (op_decode_hdr_maxsz + \
 217                                 decode_verifier_maxsz)
 218#define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 219                                nfs4_name_maxsz)
 220#define decode_remove_maxsz     (op_decode_hdr_maxsz + \
 221                                 decode_change_info_maxsz)
 222#define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 223                                2 * nfs4_name_maxsz)
 224#define decode_rename_maxsz     (op_decode_hdr_maxsz + \
 225                                 decode_change_info_maxsz + \
 226                                 decode_change_info_maxsz)
 227#define encode_link_maxsz       (op_encode_hdr_maxsz + \
 228                                nfs4_name_maxsz)
 229#define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
 230#define encode_lockowner_maxsz  (7)
 231#define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 232                                 7 + \
 233                                 1 + encode_stateid_maxsz + 1 + \
 234                                 encode_lockowner_maxsz)
 235#define decode_lock_denied_maxsz \
 236                                (8 + decode_lockowner_maxsz)
 237#define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 238                                 decode_lock_denied_maxsz)
 239#define encode_lockt_maxsz      (op_encode_hdr_maxsz + 5 + \
 240                                encode_lockowner_maxsz)
 241#define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 242                                 decode_lock_denied_maxsz)
 243#define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 244                                 encode_stateid_maxsz + \
 245                                 4)
 246#define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 247                                 decode_stateid_maxsz)
 248#define encode_release_lockowner_maxsz \
 249                                (op_encode_hdr_maxsz + \
 250                                 encode_lockowner_maxsz)
 251#define decode_release_lockowner_maxsz \
 252                                (op_decode_hdr_maxsz)
 253#define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 254#define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 255#define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 256                                1 + nfs4_name_maxsz + \
 257                                1 + \
 258                                nfs4_fattr_maxsz)
 259#define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 260#define encode_create_maxsz     (op_encode_hdr_maxsz + \
 261                                1 + 2 + nfs4_name_maxsz + \
 262                                encode_attrs_maxsz)
 263#define decode_create_maxsz     (op_decode_hdr_maxsz + \
 264                                decode_change_info_maxsz + \
 265                                nfs4_fattr_bitmap_maxsz)
 266#define encode_statfs_maxsz     (encode_getattr_maxsz)
 267#define decode_statfs_maxsz     (decode_getattr_maxsz)
 268#define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 269#define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 270#define encode_getacl_maxsz     (encode_getattr_maxsz)
 271#define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 272                                 nfs4_fattr_bitmap_maxsz + 1)
 273#define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 274                                 encode_stateid_maxsz + 3)
 275#define decode_setacl_maxsz     (decode_setattr_maxsz)
 276#define encode_fs_locations_maxsz \
 277                                (encode_getattr_maxsz)
 278#define decode_fs_locations_maxsz \
 279                                (0)
 280#define encode_secinfo_maxsz    (op_encode_hdr_maxsz + nfs4_name_maxsz)
 281#define decode_secinfo_maxsz    (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
 282
 283#if defined(CONFIG_NFS_V4_1)
 284#define NFS4_MAX_MACHINE_NAME_LEN (64)
 285#define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \
 286                         sizeof(utsname()->version) + sizeof(utsname()->machine) + 8)
 287
 288#define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
 289                                encode_verifier_maxsz + \
 290                                1 /* co_ownerid.len */ + \
 291                                XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
 292                                1 /* flags */ + \
 293                                1 /* spa_how */ + \
 294                                /* max is SP4_MACH_CRED (for now) */ + \
 295                                1 + NFS4_OP_MAP_NUM_WORDS + \
 296                                1 + NFS4_OP_MAP_NUM_WORDS + \
 297                                1 /* implementation id array of size 1 */ + \
 298                                1 /* nii_domain */ + \
 299                                XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 300                                1 /* nii_name */ + \
 301                                XDR_QUADLEN(IMPL_NAME_LIMIT) + \
 302                                3 /* nii_date */)
 303#define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
 304                                2 /* eir_clientid */ + \
 305                                1 /* eir_sequenceid */ + \
 306                                1 /* eir_flags */ + \
 307                                1 /* spr_how */ + \
 308                                  /* max is SP4_MACH_CRED (for now) */ + \
 309                                1 + NFS4_OP_MAP_NUM_WORDS + \
 310                                1 + NFS4_OP_MAP_NUM_WORDS + \
 311                                2 /* eir_server_owner.so_minor_id */ + \
 312                                /* eir_server_owner.so_major_id<> */ \
 313                                XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 314                                /* eir_server_scope<> */ \
 315                                XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 316                                1 /* eir_server_impl_id array length */ + \
 317                                1 /* nii_domain */ + \
 318                                XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 319                                1 /* nii_name */ + \
 320                                XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 321                                3 /* nii_date */)
 322#define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
 323#define decode_channel_attrs_maxsz  (6 + \
 324                                     1 /* ca_rdma_ird.len */ + \
 325                                     1 /* ca_rdma_ird */)
 326#define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
 327                                     2 /* csa_clientid */ + \
 328                                     1 /* csa_sequence */ + \
 329                                     1 /* csa_flags */ + \
 330                                     encode_channel_attrs_maxsz + \
 331                                     encode_channel_attrs_maxsz + \
 332                                     1 /* csa_cb_program */ + \
 333                                     1 /* csa_sec_parms.len (1) */ + \
 334                                     1 /* cb_secflavor (AUTH_SYS) */ + \
 335                                     1 /* stamp */ + \
 336                                     1 /* machinename.len */ + \
 337                                     XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
 338                                     1 /* uid */ + \
 339                                     1 /* gid */ + \
 340                                     1 /* gids.len (0) */)
 341#define decode_create_session_maxsz  (op_decode_hdr_maxsz +     \
 342                                     XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 343                                     1 /* csr_sequence */ + \
 344                                     1 /* csr_flags */ + \
 345                                     decode_channel_attrs_maxsz + \
 346                                     decode_channel_attrs_maxsz)
 347#define encode_bind_conn_to_session_maxsz  (op_encode_hdr_maxsz + \
 348                                     /* bctsa_sessid */ \
 349                                     XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 350                                     1 /* bctsa_dir */ + \
 351                                     1 /* bctsa_use_conn_in_rdma_mode */)
 352#define decode_bind_conn_to_session_maxsz  (op_decode_hdr_maxsz +       \
 353                                     /* bctsr_sessid */ \
 354                                     XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 355                                     1 /* bctsr_dir */ + \
 356                                     1 /* bctsr_use_conn_in_rdma_mode */)
 357#define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
 358#define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
 359#define encode_destroy_clientid_maxsz   (op_encode_hdr_maxsz + 2)
 360#define decode_destroy_clientid_maxsz   (op_decode_hdr_maxsz)
 361#define encode_sequence_maxsz   (op_encode_hdr_maxsz + \
 362                                XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
 363#define decode_sequence_maxsz   (op_decode_hdr_maxsz + \
 364                                XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
 365#define encode_reclaim_complete_maxsz   (op_encode_hdr_maxsz + 4)
 366#define decode_reclaim_complete_maxsz   (op_decode_hdr_maxsz + 4)
 367#define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + \
 368                                XDR_QUADLEN(NFS4_DEVICEID4_SIZE) + \
 369                                1 /* layout type */ + \
 370                                1 /* maxcount */ + \
 371                                1 /* bitmap size */ + \
 372                                1 /* notification bitmap length */ + \
 373                                1 /* notification bitmap, word 0 */)
 374#define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
 375                                1 /* layout type */ + \
 376                                1 /* opaque devaddr4 length */ + \
 377                                  /* devaddr4 payload is read into page */ \
 378                                1 /* notification bitmap length */ + \
 379                                1 /* notification bitmap, word 0 */)
 380#define encode_layoutget_maxsz  (op_encode_hdr_maxsz + 10 + \
 381                                encode_stateid_maxsz)
 382#define decode_layoutget_maxsz  (op_decode_hdr_maxsz + 8 + \
 383                                decode_stateid_maxsz + \
 384                                XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
 385#define encode_layoutcommit_maxsz (op_encode_hdr_maxsz +          \
 386                                2 /* offset */ + \
 387                                2 /* length */ + \
 388                                1 /* reclaim */ + \
 389                                encode_stateid_maxsz + \
 390                                1 /* new offset (true) */ + \
 391                                2 /* last byte written */ + \
 392                                1 /* nt_timechanged (false) */ + \
 393                                1 /* layoutupdate4 layout type */ + \
 394                                1 /* layoutupdate4 opaqueue len */)
 395                                  /* the actual content of layoutupdate4 should
 396                                     be allocated by drivers and spliced in
 397                                     using xdr_write_pages */
 398#define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
 399#define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
 400                                encode_stateid_maxsz + \
 401                                1 /* FIXME: opaque lrf_body always empty at the moment */)
 402#define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
 403                                1 + decode_stateid_maxsz)
 404#define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
 405#define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
 406#define encode_test_stateid_maxsz       (op_encode_hdr_maxsz + 2 + \
 407                                         XDR_QUADLEN(NFS4_STATEID_SIZE))
 408#define decode_test_stateid_maxsz       (op_decode_hdr_maxsz + 2 + 1)
 409#define encode_free_stateid_maxsz       (op_encode_hdr_maxsz + 1 + \
 410                                         XDR_QUADLEN(NFS4_STATEID_SIZE))
 411#define decode_free_stateid_maxsz       (op_decode_hdr_maxsz)
 412#else /* CONFIG_NFS_V4_1 */
 413#define encode_sequence_maxsz   0
 414#define decode_sequence_maxsz   0
 415#endif /* CONFIG_NFS_V4_1 */
 416
 417#define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 418#define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 419#define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 420                                encode_sequence_maxsz + \
 421                                encode_putfh_maxsz + \
 422                                encode_read_maxsz)
 423#define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 424                                decode_sequence_maxsz + \
 425                                decode_putfh_maxsz + \
 426                                decode_read_maxsz)
 427#define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 428                                encode_sequence_maxsz + \
 429                                encode_putfh_maxsz + \
 430                                encode_readlink_maxsz)
 431#define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 432                                decode_sequence_maxsz + \
 433                                decode_putfh_maxsz + \
 434                                decode_readlink_maxsz)
 435#define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 436                                encode_sequence_maxsz + \
 437                                encode_putfh_maxsz + \
 438                                encode_readdir_maxsz)
 439#define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 440                                decode_sequence_maxsz + \
 441                                decode_putfh_maxsz + \
 442                                decode_readdir_maxsz)
 443#define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 444                                encode_sequence_maxsz + \
 445                                encode_putfh_maxsz + \
 446                                encode_write_maxsz + \
 447                                encode_getattr_maxsz)
 448#define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 449                                decode_sequence_maxsz + \
 450                                decode_putfh_maxsz + \
 451                                decode_write_maxsz + \
 452                                decode_getattr_maxsz)
 453#define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 454                                encode_sequence_maxsz + \
 455                                encode_putfh_maxsz + \
 456                                encode_commit_maxsz)
 457#define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 458                                decode_sequence_maxsz + \
 459                                decode_putfh_maxsz + \
 460                                decode_commit_maxsz)
 461#define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 462                                encode_sequence_maxsz + \
 463                                encode_putfh_maxsz + \
 464                                encode_open_maxsz + \
 465                                encode_access_maxsz + \
 466                                encode_getfh_maxsz + \
 467                                encode_getattr_maxsz)
 468#define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 469                                decode_sequence_maxsz + \
 470                                decode_putfh_maxsz + \
 471                                decode_open_maxsz + \
 472                                decode_access_maxsz + \
 473                                decode_getfh_maxsz + \
 474                                decode_getattr_maxsz)
 475#define NFS4_enc_open_confirm_sz \
 476                                (compound_encode_hdr_maxsz + \
 477                                 encode_putfh_maxsz + \
 478                                 encode_open_confirm_maxsz)
 479#define NFS4_dec_open_confirm_sz \
 480                                (compound_decode_hdr_maxsz + \
 481                                 decode_putfh_maxsz + \
 482                                 decode_open_confirm_maxsz)
 483#define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 484                                        encode_sequence_maxsz + \
 485                                        encode_putfh_maxsz + \
 486                                        encode_open_maxsz + \
 487                                        encode_access_maxsz + \
 488                                        encode_getattr_maxsz)
 489#define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 490                                        decode_sequence_maxsz + \
 491                                        decode_putfh_maxsz + \
 492                                        decode_open_maxsz + \
 493                                        decode_access_maxsz + \
 494                                        decode_getattr_maxsz)
 495#define NFS4_enc_open_downgrade_sz \
 496                                (compound_encode_hdr_maxsz + \
 497                                 encode_sequence_maxsz + \
 498                                 encode_putfh_maxsz + \
 499                                 encode_open_downgrade_maxsz + \
 500                                 encode_getattr_maxsz)
 501#define NFS4_dec_open_downgrade_sz \
 502                                (compound_decode_hdr_maxsz + \
 503                                 decode_sequence_maxsz + \
 504                                 decode_putfh_maxsz + \
 505                                 decode_open_downgrade_maxsz + \
 506                                 decode_getattr_maxsz)
 507#define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 508                                 encode_sequence_maxsz + \
 509                                 encode_putfh_maxsz + \
 510                                 encode_close_maxsz + \
 511                                 encode_getattr_maxsz)
 512#define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 513                                 decode_sequence_maxsz + \
 514                                 decode_putfh_maxsz + \
 515                                 decode_close_maxsz + \
 516                                 decode_getattr_maxsz)
 517#define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 518                                 encode_sequence_maxsz + \
 519                                 encode_putfh_maxsz + \
 520                                 encode_setattr_maxsz + \
 521                                 encode_getattr_maxsz)
 522#define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 523                                 decode_sequence_maxsz + \
 524                                 decode_putfh_maxsz + \
 525                                 decode_setattr_maxsz + \
 526                                 decode_getattr_maxsz)
 527#define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 528                                encode_sequence_maxsz + \
 529                                encode_putfh_maxsz + \
 530                                encode_fsinfo_maxsz)
 531#define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 532                                decode_sequence_maxsz + \
 533                                decode_putfh_maxsz + \
 534                                decode_fsinfo_maxsz)
 535#define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 536                                encode_renew_maxsz)
 537#define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 538                                decode_renew_maxsz)
 539#define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 540                                encode_setclientid_maxsz)
 541#define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 542                                decode_setclientid_maxsz)
 543#define NFS4_enc_setclientid_confirm_sz \
 544                                (compound_encode_hdr_maxsz + \
 545                                encode_setclientid_confirm_maxsz)
 546#define NFS4_dec_setclientid_confirm_sz \
 547                                (compound_decode_hdr_maxsz + \
 548                                decode_setclientid_confirm_maxsz)
 549#define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 550                                encode_sequence_maxsz + \
 551                                encode_putfh_maxsz + \
 552                                encode_lock_maxsz)
 553#define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 554                                decode_sequence_maxsz + \
 555                                decode_putfh_maxsz + \
 556                                decode_lock_maxsz)
 557#define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 558                                encode_sequence_maxsz + \
 559                                encode_putfh_maxsz + \
 560                                encode_lockt_maxsz)
 561#define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 562                                 decode_sequence_maxsz + \
 563                                 decode_putfh_maxsz + \
 564                                 decode_lockt_maxsz)
 565#define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 566                                encode_sequence_maxsz + \
 567                                encode_putfh_maxsz + \
 568                                encode_locku_maxsz)
 569#define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 570                                decode_sequence_maxsz + \
 571                                decode_putfh_maxsz + \
 572                                decode_locku_maxsz)
 573#define NFS4_enc_release_lockowner_sz \
 574                                (compound_encode_hdr_maxsz + \
 575                                 encode_lockowner_maxsz)
 576#define NFS4_dec_release_lockowner_sz \
 577                                (compound_decode_hdr_maxsz + \
 578                                 decode_lockowner_maxsz)
 579#define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 580                                encode_sequence_maxsz + \
 581                                encode_putfh_maxsz + \
 582                                encode_access_maxsz + \
 583                                encode_getattr_maxsz)
 584#define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 585                                decode_sequence_maxsz + \
 586                                decode_putfh_maxsz + \
 587                                decode_access_maxsz + \
 588                                decode_getattr_maxsz)
 589#define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 590                                encode_sequence_maxsz + \
 591                                encode_putfh_maxsz + \
 592                                encode_getattr_maxsz + \
 593                                encode_renew_maxsz)
 594#define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 595                                decode_sequence_maxsz + \
 596                                decode_putfh_maxsz + \
 597                                decode_getattr_maxsz + \
 598                                decode_renew_maxsz)
 599#define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 600                                encode_sequence_maxsz + \
 601                                encode_putfh_maxsz + \
 602                                encode_lookup_maxsz + \
 603                                encode_getattr_maxsz + \
 604                                encode_getfh_maxsz)
 605#define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 606                                decode_sequence_maxsz + \
 607                                decode_putfh_maxsz + \
 608                                decode_lookup_maxsz + \
 609                                decode_getattr_maxsz + \
 610                                decode_getfh_maxsz)
 611#define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 612                                encode_sequence_maxsz + \
 613                                encode_putrootfh_maxsz + \
 614                                encode_getattr_maxsz + \
 615                                encode_getfh_maxsz)
 616#define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 617                                decode_sequence_maxsz + \
 618                                decode_putrootfh_maxsz + \
 619                                decode_getattr_maxsz + \
 620                                decode_getfh_maxsz)
 621#define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 622                                encode_sequence_maxsz + \
 623                                encode_putfh_maxsz + \
 624                                encode_remove_maxsz)
 625#define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 626                                decode_sequence_maxsz + \
 627                                decode_putfh_maxsz + \
 628                                decode_remove_maxsz)
 629#define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 630                                encode_sequence_maxsz + \
 631                                encode_putfh_maxsz + \
 632                                encode_savefh_maxsz + \
 633                                encode_putfh_maxsz + \
 634                                encode_rename_maxsz)
 635#define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 636                                decode_sequence_maxsz + \
 637                                decode_putfh_maxsz + \
 638                                decode_savefh_maxsz + \
 639                                decode_putfh_maxsz + \
 640                                decode_rename_maxsz)
 641#define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 642                                encode_sequence_maxsz + \
 643                                encode_putfh_maxsz + \
 644                                encode_savefh_maxsz + \
 645                                encode_putfh_maxsz + \
 646                                encode_link_maxsz + \
 647                                encode_restorefh_maxsz + \
 648                                encode_getattr_maxsz)
 649#define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 650                                decode_sequence_maxsz + \
 651                                decode_putfh_maxsz + \
 652                                decode_savefh_maxsz + \
 653                                decode_putfh_maxsz + \
 654                                decode_link_maxsz + \
 655                                decode_restorefh_maxsz + \
 656                                decode_getattr_maxsz)
 657#define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 658                                encode_sequence_maxsz + \
 659                                encode_putfh_maxsz + \
 660                                encode_symlink_maxsz + \
 661                                encode_getattr_maxsz + \
 662                                encode_getfh_maxsz)
 663#define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 664                                decode_sequence_maxsz + \
 665                                decode_putfh_maxsz + \
 666                                decode_symlink_maxsz + \
 667                                decode_getattr_maxsz + \
 668                                decode_getfh_maxsz)
 669#define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 670                                encode_sequence_maxsz + \
 671                                encode_putfh_maxsz + \
 672                                encode_create_maxsz + \
 673                                encode_getfh_maxsz + \
 674                                encode_getattr_maxsz)
 675#define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 676                                decode_sequence_maxsz + \
 677                                decode_putfh_maxsz + \
 678                                decode_create_maxsz + \
 679                                decode_getfh_maxsz + \
 680                                decode_getattr_maxsz)
 681#define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 682                                encode_sequence_maxsz + \
 683                                encode_putfh_maxsz + \
 684                                encode_getattr_maxsz)
 685#define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 686                                decode_sequence_maxsz + \
 687                                decode_putfh_maxsz + \
 688                                decode_getattr_maxsz)
 689#define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 690                                encode_sequence_maxsz + \
 691                                encode_putfh_maxsz + \
 692                                encode_statfs_maxsz)
 693#define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 694                                decode_sequence_maxsz + \
 695                                decode_putfh_maxsz + \
 696                                decode_statfs_maxsz)
 697#define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 698                                encode_sequence_maxsz + \
 699                                encode_putfh_maxsz + \
 700                                encode_getattr_maxsz)
 701#define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 702                                decode_sequence_maxsz + \
 703                                decode_putfh_maxsz + \
 704                                decode_getattr_maxsz)
 705#define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 706                                encode_sequence_maxsz + \
 707                                encode_putfh_maxsz + \
 708                                encode_delegreturn_maxsz + \
 709                                encode_getattr_maxsz)
 710#define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 711                                decode_sequence_maxsz + \
 712                                decode_delegreturn_maxsz + \
 713                                decode_getattr_maxsz)
 714#define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 715                                encode_sequence_maxsz + \
 716                                encode_putfh_maxsz + \
 717                                encode_getacl_maxsz)
 718#define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 719                                decode_sequence_maxsz + \
 720                                decode_putfh_maxsz + \
 721                                decode_getacl_maxsz)
 722#define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 723                                encode_sequence_maxsz + \
 724                                encode_putfh_maxsz + \
 725                                encode_setacl_maxsz)
 726#define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 727                                decode_sequence_maxsz + \
 728                                decode_putfh_maxsz + \
 729                                decode_setacl_maxsz)
 730#define NFS4_enc_fs_locations_sz \
 731                                (compound_encode_hdr_maxsz + \
 732                                 encode_sequence_maxsz + \
 733                                 encode_putfh_maxsz + \
 734                                 encode_lookup_maxsz + \
 735                                 encode_fs_locations_maxsz + \
 736                                 encode_renew_maxsz)
 737#define NFS4_dec_fs_locations_sz \
 738                                (compound_decode_hdr_maxsz + \
 739                                 decode_sequence_maxsz + \
 740                                 decode_putfh_maxsz + \
 741                                 decode_lookup_maxsz + \
 742                                 decode_fs_locations_maxsz + \
 743                                 decode_renew_maxsz)
 744#define NFS4_enc_secinfo_sz     (compound_encode_hdr_maxsz + \
 745                                encode_sequence_maxsz + \
 746                                encode_putfh_maxsz + \
 747                                encode_secinfo_maxsz)
 748#define NFS4_dec_secinfo_sz     (compound_decode_hdr_maxsz + \
 749                                decode_sequence_maxsz + \
 750                                decode_putfh_maxsz + \
 751                                decode_secinfo_maxsz)
 752#define NFS4_enc_fsid_present_sz \
 753                                (compound_encode_hdr_maxsz + \
 754                                 encode_sequence_maxsz + \
 755                                 encode_putfh_maxsz + \
 756                                 encode_getfh_maxsz + \
 757                                 encode_renew_maxsz)
 758#define NFS4_dec_fsid_present_sz \
 759                                (compound_decode_hdr_maxsz + \
 760                                 decode_sequence_maxsz + \
 761                                 decode_putfh_maxsz + \
 762                                 decode_getfh_maxsz + \
 763                                 decode_renew_maxsz)
 764#if defined(CONFIG_NFS_V4_1)
 765#define NFS4_enc_bind_conn_to_session_sz \
 766                                (compound_encode_hdr_maxsz + \
 767                                 encode_bind_conn_to_session_maxsz)
 768#define NFS4_dec_bind_conn_to_session_sz \
 769                                (compound_decode_hdr_maxsz + \
 770                                 decode_bind_conn_to_session_maxsz)
 771#define NFS4_enc_exchange_id_sz \
 772                                (compound_encode_hdr_maxsz + \
 773                                 encode_exchange_id_maxsz)
 774#define NFS4_dec_exchange_id_sz \
 775                                (compound_decode_hdr_maxsz + \
 776                                 decode_exchange_id_maxsz)
 777#define NFS4_enc_create_session_sz \
 778                                (compound_encode_hdr_maxsz + \
 779                                 encode_create_session_maxsz)
 780#define NFS4_dec_create_session_sz \
 781                                (compound_decode_hdr_maxsz + \
 782                                 decode_create_session_maxsz)
 783#define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
 784                                         encode_destroy_session_maxsz)
 785#define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
 786                                         decode_destroy_session_maxsz)
 787#define NFS4_enc_destroy_clientid_sz    (compound_encode_hdr_maxsz + \
 788                                         encode_destroy_clientid_maxsz)
 789#define NFS4_dec_destroy_clientid_sz    (compound_decode_hdr_maxsz + \
 790                                         decode_destroy_clientid_maxsz)
 791#define NFS4_enc_sequence_sz \
 792                                (compound_decode_hdr_maxsz + \
 793                                 encode_sequence_maxsz)
 794#define NFS4_dec_sequence_sz \
 795                                (compound_decode_hdr_maxsz + \
 796                                 decode_sequence_maxsz)
 797#define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
 798                                         encode_sequence_maxsz + \
 799                                         encode_putrootfh_maxsz + \
 800                                         encode_fsinfo_maxsz)
 801#define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
 802                                         decode_sequence_maxsz + \
 803                                         decode_putrootfh_maxsz + \
 804                                         decode_fsinfo_maxsz)
 805#define NFS4_enc_reclaim_complete_sz    (compound_encode_hdr_maxsz + \
 806                                         encode_sequence_maxsz + \
 807                                         encode_reclaim_complete_maxsz)
 808#define NFS4_dec_reclaim_complete_sz    (compound_decode_hdr_maxsz + \
 809                                         decode_sequence_maxsz + \
 810                                         decode_reclaim_complete_maxsz)
 811#define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
 812                                encode_sequence_maxsz +\
 813                                encode_getdeviceinfo_maxsz)
 814#define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
 815                                decode_sequence_maxsz + \
 816                                decode_getdeviceinfo_maxsz)
 817#define NFS4_enc_layoutget_sz   (compound_encode_hdr_maxsz + \
 818                                encode_sequence_maxsz + \
 819                                encode_putfh_maxsz +        \
 820                                encode_layoutget_maxsz)
 821#define NFS4_dec_layoutget_sz   (compound_decode_hdr_maxsz + \
 822                                decode_sequence_maxsz + \
 823                                decode_putfh_maxsz +        \
 824                                decode_layoutget_maxsz)
 825#define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
 826                                encode_sequence_maxsz +\
 827                                encode_putfh_maxsz + \
 828                                encode_layoutcommit_maxsz + \
 829                                encode_getattr_maxsz)
 830#define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
 831                                decode_sequence_maxsz + \
 832                                decode_putfh_maxsz + \
 833                                decode_layoutcommit_maxsz + \
 834                                decode_getattr_maxsz)
 835#define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
 836                                encode_sequence_maxsz + \
 837                                encode_putfh_maxsz + \
 838                                encode_layoutreturn_maxsz)
 839#define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
 840                                decode_sequence_maxsz + \
 841                                decode_putfh_maxsz + \
 842                                decode_layoutreturn_maxsz)
 843#define NFS4_enc_secinfo_no_name_sz     (compound_encode_hdr_maxsz + \
 844                                        encode_sequence_maxsz + \
 845                                        encode_putrootfh_maxsz +\
 846                                        encode_secinfo_no_name_maxsz)
 847#define NFS4_dec_secinfo_no_name_sz     (compound_decode_hdr_maxsz + \
 848                                        decode_sequence_maxsz + \
 849                                        decode_putrootfh_maxsz + \
 850                                        decode_secinfo_no_name_maxsz)
 851#define NFS4_enc_test_stateid_sz        (compound_encode_hdr_maxsz + \
 852                                         encode_sequence_maxsz + \
 853                                         encode_test_stateid_maxsz)
 854#define NFS4_dec_test_stateid_sz        (compound_decode_hdr_maxsz + \
 855                                         decode_sequence_maxsz + \
 856                                         decode_test_stateid_maxsz)
 857#define NFS4_enc_free_stateid_sz        (compound_encode_hdr_maxsz + \
 858                                         encode_sequence_maxsz + \
 859                                         encode_free_stateid_maxsz)
 860#define NFS4_dec_free_stateid_sz        (compound_decode_hdr_maxsz + \
 861                                         decode_sequence_maxsz + \
 862                                         decode_free_stateid_maxsz)
 863
 864const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 865                                      compound_encode_hdr_maxsz +
 866                                      encode_sequence_maxsz +
 867                                      encode_putfh_maxsz +
 868                                      encode_getattr_maxsz) *
 869                                     XDR_UNIT);
 870
 871const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 872                                     compound_decode_hdr_maxsz +
 873                                     decode_sequence_maxsz +
 874                                     decode_putfh_maxsz) *
 875                                    XDR_UNIT);
 876
 877const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH +
 878                                           compound_decode_hdr_maxsz +
 879                                           decode_sequence_maxsz) *
 880                                          XDR_UNIT);
 881EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead);
 882#endif /* CONFIG_NFS_V4_1 */
 883
 884static const umode_t nfs_type2fmt[] = {
 885        [NF4BAD] = 0,
 886        [NF4REG] = S_IFREG,
 887        [NF4DIR] = S_IFDIR,
 888        [NF4BLK] = S_IFBLK,
 889        [NF4CHR] = S_IFCHR,
 890        [NF4LNK] = S_IFLNK,
 891        [NF4SOCK] = S_IFSOCK,
 892        [NF4FIFO] = S_IFIFO,
 893        [NF4ATTRDIR] = 0,
 894        [NF4NAMEDATTR] = 0,
 895};
 896
 897struct compound_hdr {
 898        int32_t         status;
 899        uint32_t        nops;
 900        __be32 *        nops_p;
 901        uint32_t        taglen;
 902        char *          tag;
 903        uint32_t        replen;         /* expected reply words */
 904        u32             minorversion;
 905};
 906
 907static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
 908{
 909        __be32 *p = xdr_reserve_space(xdr, nbytes);
 910        BUG_ON(!p);
 911        return p;
 912}
 913
 914static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
 915{
 916        __be32 *p;
 917
 918        p = xdr_reserve_space(xdr, len);
 919        xdr_encode_opaque_fixed(p, buf, len);
 920}
 921
 922static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 923{
 924        __be32 *p;
 925
 926        p = reserve_space(xdr, 4 + len);
 927        xdr_encode_opaque(p, str, len);
 928}
 929
 930static void encode_uint32(struct xdr_stream *xdr, u32 n)
 931{
 932        __be32 *p;
 933
 934        p = reserve_space(xdr, 4);
 935        *p = cpu_to_be32(n);
 936}
 937
 938static void encode_uint64(struct xdr_stream *xdr, u64 n)
 939{
 940        __be32 *p;
 941
 942        p = reserve_space(xdr, 8);
 943        xdr_encode_hyper(p, n);
 944}
 945
 946static void encode_nfs4_seqid(struct xdr_stream *xdr,
 947                const struct nfs_seqid *seqid)
 948{
 949        if (seqid != NULL)
 950                encode_uint32(xdr, seqid->sequence->counter);
 951        else
 952                encode_uint32(xdr, 0);
 953}
 954
 955static void encode_compound_hdr(struct xdr_stream *xdr,
 956                                struct rpc_rqst *req,
 957                                struct compound_hdr *hdr)
 958{
 959        __be32 *p;
 960        struct rpc_auth *auth = req->rq_cred->cr_auth;
 961
 962        /* initialize running count of expected bytes in reply.
 963         * NOTE: the replied tag SHOULD be the same is the one sent,
 964         * but this is not required as a MUST for the server to do so. */
 965        hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
 966
 967        WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
 968        encode_string(xdr, hdr->taglen, hdr->tag);
 969        p = reserve_space(xdr, 8);
 970        *p++ = cpu_to_be32(hdr->minorversion);
 971        hdr->nops_p = p;
 972        *p = cpu_to_be32(hdr->nops);
 973}
 974
 975static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
 976                uint32_t replen,
 977                struct compound_hdr *hdr)
 978{
 979        encode_uint32(xdr, op);
 980        hdr->nops++;
 981        hdr->replen += replen;
 982}
 983
 984static void encode_nops(struct compound_hdr *hdr)
 985{
 986        WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
 987        *hdr->nops_p = htonl(hdr->nops);
 988}
 989
 990static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
 991{
 992        encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
 993}
 994
 995static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 996{
 997        encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
 998}
 999
1000static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,

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

2001        *p++ = cpu_to_be32(args->layout_type);
2002        *p++ = cpu_to_be32(args->range.iomode);
2003        *p = cpu_to_be32(RETURN_FILE);
2004        p = reserve_space(xdr, 16);
2005        p = xdr_encode_hyper(p, args->range.offset);
2006        p = xdr_encode_hyper(p, args->range.length);
2007        spin_lock(&args->inode->i_lock);
2008        encode_nfs4_stateid(xdr, &args->stateid);
2009        spin_unlock(&args->inode->i_lock);
2010        if (NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn) {
2011                NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn(
2012                        NFS_I(args->inode)->layout, xdr, args);
2013        } else
2014                encode_uint32(xdr, 0);
2015}
2016
2017static int
2018encode_secinfo_no_name(struct xdr_stream *xdr,
2019                       const struct nfs41_secinfo_no_name_args *args,
2020                       struct compound_hdr *hdr)
2021{
2022        encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2023        encode_uint32(xdr, args->style);
2024        return 0;
2025}
2026
2027static void encode_test_stateid(struct xdr_stream *xdr,
2028                                struct nfs41_test_stateid_args *args,
2029                                struct compound_hdr *hdr)
2030{
2031        encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2032        encode_uint32(xdr, 1);
2033        encode_nfs4_stateid(xdr, args->stateid);
2034}
2035
2036static void encode_free_stateid(struct xdr_stream *xdr,
2037                                struct nfs41_free_stateid_args *args,
2038                                struct compound_hdr *hdr)
2039{
2040        encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2041        encode_nfs4_stateid(xdr, &args->stateid);
2042}
2043#endif /* CONFIG_NFS_V4_1 */
2044
2045/*
2046 * END OF "GENERIC" ENCODE ROUTINES.
2047 */
2048
2049static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2050{
2051#if defined(CONFIG_NFS_V4_1)
2052        struct nfs4_session *session = args->sa_slot->table->session;
2053        if (session)
2054                return session->clp->cl_mvops->minor_version;
2055#endif /* CONFIG_NFS_V4_1 */
2056        return 0;
2057}
2058
2059/*
2060 * Encode an ACCESS request
2061 */
2062static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2063                                const struct nfs4_accessargs *args)
2064{
2065        struct compound_hdr hdr = {
2066                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2067        };
2068
2069        encode_compound_hdr(xdr, req, &hdr);
2070        encode_sequence(xdr, &args->seq_args, &hdr);
2071        encode_putfh(xdr, args->fh, &hdr);
2072        encode_access(xdr, args->access, &hdr);
2073        encode_getfattr(xdr, args->bitmask, &hdr);
2074        encode_nops(&hdr);
2075}
2076
2077/*
2078 * Encode LOOKUP request
2079 */
2080static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2081                                const struct nfs4_lookup_arg *args)
2082{
2083        struct compound_hdr hdr = {
2084                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2085        };
2086
2087        encode_compound_hdr(xdr, req, &hdr);
2088        encode_sequence(xdr, &args->seq_args, &hdr);
2089        encode_putfh(xdr, args->dir_fh, &hdr);
2090        encode_lookup(xdr, args->name, &hdr);
2091        encode_getfh(xdr, &hdr);
2092        encode_getfattr(xdr, args->bitmask, &hdr);
2093        encode_nops(&hdr);
2094}
2095
2096/*
2097 * Encode LOOKUP_ROOT request
2098 */
2099static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2100                                     struct xdr_stream *xdr,
2101                                     const struct nfs4_lookup_root_arg *args)
2102{
2103        struct compound_hdr hdr = {
2104                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2105        };
2106
2107        encode_compound_hdr(xdr, req, &hdr);
2108        encode_sequence(xdr, &args->seq_args, &hdr);
2109        encode_putrootfh(xdr, &hdr);
2110        encode_getfh(xdr, &hdr);
2111        encode_getfattr(xdr, args->bitmask, &hdr);
2112        encode_nops(&hdr);
2113}
2114
2115/*
2116 * Encode REMOVE request
2117 */
2118static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2119                                const struct nfs_removeargs *args)
2120{
2121        struct compound_hdr hdr = {
2122                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2123        };
2124
2125        encode_compound_hdr(xdr, req, &hdr);
2126        encode_sequence(xdr, &args->seq_args, &hdr);
2127        encode_putfh(xdr, args->fh, &hdr);
2128        encode_remove(xdr, &args->name, &hdr);
2129        encode_nops(&hdr);
2130}
2131
2132/*
2133 * Encode RENAME request
2134 */
2135static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2136                                const struct nfs_renameargs *args)
2137{
2138        struct compound_hdr hdr = {
2139                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2140        };
2141
2142        encode_compound_hdr(xdr, req, &hdr);
2143        encode_sequence(xdr, &args->seq_args, &hdr);
2144        encode_putfh(xdr, args->old_dir, &hdr);
2145        encode_savefh(xdr, &hdr);
2146        encode_putfh(xdr, args->new_dir, &hdr);
2147        encode_rename(xdr, args->old_name, args->new_name, &hdr);
2148        encode_nops(&hdr);
2149}
2150
2151/*
2152 * Encode LINK request
2153 */
2154static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2155                             const struct nfs4_link_arg *args)
2156{
2157        struct compound_hdr hdr = {
2158                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2159        };
2160
2161        encode_compound_hdr(xdr, req, &hdr);
2162        encode_sequence(xdr, &args->seq_args, &hdr);
2163        encode_putfh(xdr, args->fh, &hdr);
2164        encode_savefh(xdr, &hdr);
2165        encode_putfh(xdr, args->dir_fh, &hdr);
2166        encode_link(xdr, args->name, &hdr);
2167        encode_restorefh(xdr, &hdr);
2168        encode_getfattr(xdr, args->bitmask, &hdr);
2169        encode_nops(&hdr);
2170}
2171
2172/*
2173 * Encode CREATE request
2174 */
2175static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2176                                const struct nfs4_create_arg *args)
2177{
2178        struct compound_hdr hdr = {
2179                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2180        };
2181
2182        encode_compound_hdr(xdr, req, &hdr);
2183        encode_sequence(xdr, &args->seq_args, &hdr);
2184        encode_putfh(xdr, args->dir_fh, &hdr);
2185        encode_create(xdr, args, &hdr);
2186        encode_getfh(xdr, &hdr);
2187        encode_getfattr(xdr, args->bitmask, &hdr);
2188        encode_nops(&hdr);
2189}
2190
2191/*
2192 * Encode SYMLINK request
2193 */
2194static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2195                                 const struct nfs4_create_arg *args)
2196{
2197        nfs4_xdr_enc_create(req, xdr, args);
2198}
2199
2200/*
2201 * Encode GETATTR request
2202 */
2203static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2204                                 const struct nfs4_getattr_arg *args)
2205{
2206        struct compound_hdr hdr = {
2207                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2208        };
2209
2210        encode_compound_hdr(xdr, req, &hdr);
2211        encode_sequence(xdr, &args->seq_args, &hdr);
2212        encode_putfh(xdr, args->fh, &hdr);
2213        encode_getfattr(xdr, args->bitmask, &hdr);
2214        encode_nops(&hdr);
2215}
2216
2217/*
2218 * Encode a CLOSE request
2219 */
2220static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2221                               struct nfs_closeargs *args)
2222{
2223        struct compound_hdr hdr = {
2224                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2225        };
2226
2227        encode_compound_hdr(xdr, req, &hdr);
2228        encode_sequence(xdr, &args->seq_args, &hdr);
2229        encode_putfh(xdr, args->fh, &hdr);
2230        encode_close(xdr, args, &hdr);
2231        encode_getfattr(xdr, args->bitmask, &hdr);
2232        encode_nops(&hdr);
2233}
2234
2235/*
2236 * Encode an OPEN request
2237 */
2238static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2239                              struct nfs_openargs *args)
2240{
2241        struct compound_hdr hdr = {
2242                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2243        };
2244
2245        encode_compound_hdr(xdr, req, &hdr);
2246        encode_sequence(xdr, &args->seq_args, &hdr);
2247        encode_putfh(xdr, args->fh, &hdr);
2248        encode_open(xdr, args, &hdr);
2249        encode_getfh(xdr, &hdr);
2250        if (args->access)
2251                encode_access(xdr, args->access, &hdr);
2252        encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2253        encode_nops(&hdr);
2254}
2255
2256/*
2257 * Encode an OPEN_CONFIRM request
2258 */
2259static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2260                                      struct xdr_stream *xdr,
2261                                      struct nfs_open_confirmargs *args)
2262{
2263        struct compound_hdr hdr = {
2264                .nops   = 0,
2265        };
2266
2267        encode_compound_hdr(xdr, req, &hdr);
2268        encode_putfh(xdr, args->fh, &hdr);
2269        encode_open_confirm(xdr, args, &hdr);
2270        encode_nops(&hdr);
2271}
2272
2273/*
2274 * Encode an OPEN request with no attributes.
2275 */
2276static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2277                                     struct xdr_stream *xdr,
2278                                     struct nfs_openargs *args)
2279{
2280        struct compound_hdr hdr = {
2281                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2282        };
2283
2284        encode_compound_hdr(xdr, req, &hdr);
2285        encode_sequence(xdr, &args->seq_args, &hdr);
2286        encode_putfh(xdr, args->fh, &hdr);
2287        encode_open(xdr, args, &hdr);
2288        if (args->access)
2289                encode_access(xdr, args->access, &hdr);
2290        encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2291        encode_nops(&hdr);
2292}
2293
2294/*
2295 * Encode an OPEN_DOWNGRADE request
2296 */
2297static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2298                                        struct xdr_stream *xdr,
2299                                        struct nfs_closeargs *args)
2300{
2301        struct compound_hdr hdr = {
2302                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2303        };
2304
2305        encode_compound_hdr(xdr, req, &hdr);
2306        encode_sequence(xdr, &args->seq_args, &hdr);
2307        encode_putfh(xdr, args->fh, &hdr);
2308        encode_open_downgrade(xdr, args, &hdr);
2309        encode_getfattr(xdr, args->bitmask, &hdr);
2310        encode_nops(&hdr);
2311}
2312
2313/*
2314 * Encode a LOCK request
2315 */
2316static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2317                              struct nfs_lock_args *args)
2318{
2319        struct compound_hdr hdr = {
2320                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2321        };
2322
2323        encode_compound_hdr(xdr, req, &hdr);
2324        encode_sequence(xdr, &args->seq_args, &hdr);
2325        encode_putfh(xdr, args->fh, &hdr);
2326        encode_lock(xdr, args, &hdr);
2327        encode_nops(&hdr);
2328}
2329
2330/*
2331 * Encode a LOCKT request
2332 */
2333static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2334                               struct nfs_lockt_args *args)
2335{
2336        struct compound_hdr hdr = {
2337                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2338        };
2339
2340        encode_compound_hdr(xdr, req, &hdr);
2341        encode_sequence(xdr, &args->seq_args, &hdr);
2342        encode_putfh(xdr, args->fh, &hdr);
2343        encode_lockt(xdr, args, &hdr);
2344        encode_nops(&hdr);
2345}
2346
2347/*
2348 * Encode a LOCKU request
2349 */
2350static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2351                               struct nfs_locku_args *args)
2352{
2353        struct compound_hdr hdr = {
2354                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2355        };
2356
2357        encode_compound_hdr(xdr, req, &hdr);
2358        encode_sequence(xdr, &args->seq_args, &hdr);
2359        encode_putfh(xdr, args->fh, &hdr);
2360        encode_locku(xdr, args, &hdr);
2361        encode_nops(&hdr);
2362}
2363
2364static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2365                                           struct xdr_stream *xdr,
2366                                        struct nfs_release_lockowner_args *args)
2367{
2368        struct compound_hdr hdr = {
2369                .minorversion = 0,
2370        };
2371
2372        encode_compound_hdr(xdr, req, &hdr);
2373        encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2374        encode_nops(&hdr);
2375}
2376
2377/*
2378 * Encode a READLINK request
2379 */
2380static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2381                                  const struct nfs4_readlink *args)
2382{
2383        struct compound_hdr hdr = {
2384                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2385        };
2386
2387        encode_compound_hdr(xdr, req, &hdr);
2388        encode_sequence(xdr, &args->seq_args, &hdr);
2389        encode_putfh(xdr, args->fh, &hdr);
2390        encode_readlink(xdr, args, req, &hdr);
2391
2392        xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2393                        args->pgbase, args->pglen);
2394        encode_nops(&hdr);
2395}
2396
2397/*
2398 * Encode a READDIR request
2399 */
2400static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2401                                 const struct nfs4_readdir_arg *args)
2402{
2403        struct compound_hdr hdr = {
2404                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2405        };
2406
2407        encode_compound_hdr(xdr, req, &hdr);
2408        encode_sequence(xdr, &args->seq_args, &hdr);
2409        encode_putfh(xdr, args->fh, &hdr);
2410        encode_readdir(xdr, args, req, &hdr);
2411
2412        xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2413                         args->pgbase, args->count);
2414        dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2415                        __func__, hdr.replen << 2, args->pages,
2416                        args->pgbase, args->count);
2417        encode_nops(&hdr);
2418}
2419
2420/*
2421 * Encode a READ request
2422 */
2423static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2424                              struct nfs_pgio_args *args)
2425{
2426        struct compound_hdr hdr = {
2427                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2428        };
2429
2430        encode_compound_hdr(xdr, req, &hdr);
2431        encode_sequence(xdr, &args->seq_args, &hdr);
2432        encode_putfh(xdr, args->fh, &hdr);
2433        encode_read(xdr, args, &hdr);
2434
2435        xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2436                         args->pages, args->pgbase, args->count);
2437        req->rq_rcv_buf.flags |= XDRBUF_READ;
2438        encode_nops(&hdr);
2439}
2440
2441/*
2442 * Encode an SETATTR request
2443 */
2444static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2445                                 struct nfs_setattrargs *args)
2446{
2447        struct compound_hdr hdr = {
2448                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2449        };
2450
2451        encode_compound_hdr(xdr, req, &hdr);
2452        encode_sequence(xdr, &args->seq_args, &hdr);
2453        encode_putfh(xdr, args->fh, &hdr);
2454        encode_setattr(xdr, args, args->server, &hdr);
2455        encode_getfattr(xdr, args->bitmask, &hdr);
2456        encode_nops(&hdr);
2457}
2458
2459/*
2460 * Encode a GETACL request
2461 */
2462static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2463                                struct nfs_getaclargs *args)
2464{
2465        struct compound_hdr hdr = {
2466                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2467        };
2468        uint32_t replen;
2469
2470        encode_compound_hdr(xdr, req, &hdr);
2471        encode_sequence(xdr, &args->seq_args, &hdr);
2472        encode_putfh(xdr, args->fh, &hdr);
2473        replen = hdr.replen + op_decode_hdr_maxsz + 1;
2474        encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2475
2476        xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2477                args->acl_pages, args->acl_pgbase, args->acl_len);
2478
2479        encode_nops(&hdr);
2480}
2481
2482/*
2483 * Encode a WRITE request
2484 */
2485static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2486                               struct nfs_pgio_args *args)
2487{
2488        struct compound_hdr hdr = {
2489                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2490        };
2491
2492        encode_compound_hdr(xdr, req, &hdr);
2493        encode_sequence(xdr, &args->seq_args, &hdr);
2494        encode_putfh(xdr, args->fh, &hdr);
2495        encode_write(xdr, args, &hdr);
2496        req->rq_snd_buf.flags |= XDRBUF_WRITE;
2497        if (args->bitmask)
2498                encode_getfattr(xdr, args->bitmask, &hdr);
2499        encode_nops(&hdr);
2500}
2501
2502/*
2503 *  a COMMIT request
2504 */
2505static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2506                                struct nfs_commitargs *args)
2507{
2508        struct compound_hdr hdr = {
2509                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2510        };
2511
2512        encode_compound_hdr(xdr, req, &hdr);
2513        encode_sequence(xdr, &args->seq_args, &hdr);
2514        encode_putfh(xdr, args->fh, &hdr);
2515        encode_commit(xdr, args, &hdr);
2516        encode_nops(&hdr);
2517}
2518
2519/*
2520 * FSINFO request
2521 */
2522static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2523                                struct nfs4_fsinfo_arg *args)
2524{
2525        struct compound_hdr hdr = {
2526                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2527        };
2528
2529        encode_compound_hdr(xdr, req, &hdr);
2530        encode_sequence(xdr, &args->seq_args, &hdr);
2531        encode_putfh(xdr, args->fh, &hdr);
2532        encode_fsinfo(xdr, args->bitmask, &hdr);
2533        encode_nops(&hdr);
2534}
2535
2536/*
2537 * a PATHCONF request
2538 */
2539static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2540                                  const struct nfs4_pathconf_arg *args)
2541{
2542        struct compound_hdr hdr = {
2543                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2544        };
2545
2546        encode_compound_hdr(xdr, req, &hdr);
2547        encode_sequence(xdr, &args->seq_args, &hdr);
2548        encode_putfh(xdr, args->fh, &hdr);
2549        encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2550                           &hdr);
2551        encode_nops(&hdr);
2552}
2553
2554/*
2555 * a STATFS request
2556 */
2557static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2558                                const struct nfs4_statfs_arg *args)
2559{
2560        struct compound_hdr hdr = {
2561                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2562        };
2563
2564        encode_compound_hdr(xdr, req, &hdr);
2565        encode_sequence(xdr, &args->seq_args, &hdr);
2566        encode_putfh(xdr, args->fh, &hdr);
2567        encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2568                           args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2569        encode_nops(&hdr);
2570}
2571
2572/*
2573 * GETATTR_BITMAP request
2574 */
2575static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2576                                     struct xdr_stream *xdr,
2577                                     struct nfs4_server_caps_arg *args)
2578{
2579        struct compound_hdr hdr = {
2580                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2581        };
2582
2583        encode_compound_hdr(xdr, req, &hdr);
2584        encode_sequence(xdr, &args->seq_args, &hdr);
2585        encode_putfh(xdr, args->fhandle, &hdr);
2586        encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2587                           FATTR4_WORD0_FH_EXPIRE_TYPE|
2588                           FATTR4_WORD0_LINK_SUPPORT|
2589                           FATTR4_WORD0_SYMLINK_SUPPORT|
2590                           FATTR4_WORD0_ACLSUPPORT, &hdr);
2591        encode_nops(&hdr);
2592}
2593
2594/*
2595 * a RENEW request
2596 */
2597static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2598                               struct nfs_client *clp)
2599{
2600        struct compound_hdr hdr = {
2601                .nops   = 0,
2602        };
2603
2604        encode_compound_hdr(xdr, req, &hdr);
2605        encode_renew(xdr, clp->cl_clientid, &hdr);
2606        encode_nops(&hdr);
2607}
2608
2609/*
2610 * a SETCLIENTID request
2611 */
2612static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2613                                     struct xdr_stream *xdr,
2614                                     struct nfs4_setclientid *sc)
2615{
2616        struct compound_hdr hdr = {
2617                .nops   = 0,
2618        };
2619
2620        encode_compound_hdr(xdr, req, &hdr);
2621        encode_setclientid(xdr, sc, &hdr);
2622        encode_nops(&hdr);
2623}
2624
2625/*
2626 * a SETCLIENTID_CONFIRM request
2627 */
2628static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2629                                             struct xdr_stream *xdr,
2630                                             struct nfs4_setclientid_res *arg)
2631{
2632        struct compound_hdr hdr = {
2633                .nops   = 0,
2634        };
2635
2636        encode_compound_hdr(xdr, req, &hdr);
2637        encode_setclientid_confirm(xdr, arg, &hdr);
2638        encode_nops(&hdr);
2639}
2640
2641/*
2642 * DELEGRETURN request
2643 */
2644static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2645                                     struct xdr_stream *xdr,
2646                                     const struct nfs4_delegreturnargs *args)
2647{
2648        struct compound_hdr hdr = {
2649                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2650        };
2651
2652        encode_compound_hdr(xdr, req, &hdr);
2653        encode_sequence(xdr, &args->seq_args, &hdr);
2654        encode_putfh(xdr, args->fhandle, &hdr);
2655        encode_getfattr(xdr, args->bitmask, &hdr);
2656        encode_delegreturn(xdr, args->stateid, &hdr);
2657        encode_nops(&hdr);
2658}
2659
2660/*
2661 * Encode FS_LOCATIONS request
2662 */
2663static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2664                                      struct xdr_stream *xdr,
2665                                      struct nfs4_fs_locations_arg *args)
2666{
2667        struct compound_hdr hdr = {
2668                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2669        };
2670        uint32_t replen;
2671
2672        encode_compound_hdr(xdr, req, &hdr);
2673        encode_sequence(xdr, &args->seq_args, &hdr);
2674        if (args->migration) {
2675                encode_putfh(xdr, args->fh, &hdr);
2676                replen = hdr.replen;
2677                encode_fs_locations(xdr, args->bitmask, &hdr);
2678                if (args->renew)
2679                        encode_renew(xdr, args->clientid, &hdr);
2680        } else {
2681                encode_putfh(xdr, args->dir_fh, &hdr);
2682                encode_lookup(xdr, args->name, &hdr);
2683                replen = hdr.replen;
2684                encode_fs_locations(xdr, args->bitmask, &hdr);
2685        }
2686
2687        /* Set up reply kvec to capture returned fs_locations array. */
2688        xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2689                        0, PAGE_SIZE);
2690        encode_nops(&hdr);
2691}
2692
2693/*
2694 * Encode SECINFO request
2695 */
2696static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2697                                struct xdr_stream *xdr,
2698                                struct nfs4_secinfo_arg *args)
2699{
2700        struct compound_hdr hdr = {
2701                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2702        };
2703
2704        encode_compound_hdr(xdr, req, &hdr);
2705        encode_sequence(xdr, &args->seq_args, &hdr);
2706        encode_putfh(xdr, args->dir_fh, &hdr);
2707        encode_secinfo(xdr, args->name, &hdr);
2708        encode_nops(&hdr);
2709}
2710
2711/*
2712 * Encode FSID_PRESENT request
2713 */
2714static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2715                                      struct xdr_stream *xdr,
2716                                      struct nfs4_fsid_present_arg *args)
2717{
2718        struct compound_hdr hdr = {
2719                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2720        };
2721
2722        encode_compound_hdr(xdr, req, &hdr);
2723        encode_sequence(xdr, &args->seq_args, &hdr);
2724        encode_putfh(xdr, args->fh, &hdr);
2725        encode_getfh(xdr, &hdr);
2726        if (args->renew)
2727                encode_renew(xdr, args->clientid, &hdr);
2728        encode_nops(&hdr);
2729}
2730
2731#if defined(CONFIG_NFS_V4_1)
2732/*
2733 * BIND_CONN_TO_SESSION request
2734 */
2735static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2736                                struct xdr_stream *xdr,
2737                                struct nfs41_bind_conn_to_session_args *args)
2738{
2739        struct compound_hdr hdr = {
2740                .minorversion = args->client->cl_mvops->minor_version,
2741        };
2742
2743        encode_compound_hdr(xdr, req, &hdr);
2744        encode_bind_conn_to_session(xdr, args, &hdr);
2745        encode_nops(&hdr);
2746}
2747
2748/*
2749 * EXCHANGE_ID request
2750 */
2751static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2752                                     struct xdr_stream *xdr,
2753                                     struct nfs41_exchange_id_args *args)
2754{
2755        struct compound_hdr hdr = {
2756                .minorversion = args->client->cl_mvops->minor_version,
2757        };
2758
2759        encode_compound_hdr(xdr, req, &hdr);
2760        encode_exchange_id(xdr, args, &hdr);
2761        encode_nops(&hdr);
2762}
2763
2764/*
2765 * a CREATE_SESSION request
2766 */
2767static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2768                                        struct xdr_stream *xdr,
2769                                        struct nfs41_create_session_args *args)
2770{
2771        struct compound_hdr hdr = {
2772                .minorversion = args->client->cl_mvops->minor_version,
2773        };
2774
2775        encode_compound_hdr(xdr, req, &hdr);
2776        encode_create_session(xdr, args, &hdr);
2777        encode_nops(&hdr);
2778}
2779
2780/*
2781 * a DESTROY_SESSION request
2782 */
2783static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2784                                         struct xdr_stream *xdr,
2785                                         struct nfs4_session *session)
2786{
2787        struct compound_hdr hdr = {
2788                .minorversion = session->clp->cl_mvops->minor_version,
2789        };
2790
2791        encode_compound_hdr(xdr, req, &hdr);
2792        encode_destroy_session(xdr, session, &hdr);
2793        encode_nops(&hdr);
2794}
2795
2796/*
2797 * a DESTROY_CLIENTID request
2798 */
2799static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2800                                         struct xdr_stream *xdr,
2801                                         struct nfs_client *clp)
2802{
2803        struct compound_hdr hdr = {
2804                .minorversion = clp->cl_mvops->minor_version,
2805        };
2806
2807        encode_compound_hdr(xdr, req, &hdr);
2808        encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2809        encode_nops(&hdr);
2810}
2811
2812/*
2813 * a SEQUENCE request
2814 */
2815static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2816                                  struct nfs4_sequence_args *args)
2817{
2818        struct compound_hdr hdr = {
2819                .minorversion = nfs4_xdr_minorversion(args),
2820        };
2821
2822        encode_compound_hdr(xdr, req, &hdr);
2823        encode_sequence(xdr, args, &hdr);
2824        encode_nops(&hdr);
2825}
2826
2827/*
2828 * a GET_LEASE_TIME request
2829 */
2830static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2831                                        struct xdr_stream *xdr,
2832                                        struct nfs4_get_lease_time_args *args)
2833{
2834        struct compound_hdr hdr = {
2835                .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2836        };
2837        const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2838
2839        encode_compound_hdr(xdr, req, &hdr);
2840        encode_sequence(xdr, &args->la_seq_args, &hdr);
2841        encode_putrootfh(xdr, &hdr);
2842        encode_fsinfo(xdr, lease_bitmap, &hdr);
2843        encode_nops(&hdr);
2844}
2845
2846/*
2847 * a RECLAIM_COMPLETE request
2848 */
2849static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2850                                          struct xdr_stream *xdr,
2851                                struct nfs41_reclaim_complete_args *args)
2852{
2853        struct compound_hdr hdr = {
2854                .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2855        };
2856
2857        encode_compound_hdr(xdr, req, &hdr);
2858        encode_sequence(xdr, &args->seq_args, &hdr);
2859        encode_reclaim_complete(xdr, args, &hdr);
2860        encode_nops(&hdr);
2861}
2862
2863/*
2864 * Encode GETDEVICEINFO request
2865 */
2866static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2867                                       struct xdr_stream *xdr,
2868                                       struct nfs4_getdeviceinfo_args *args)
2869{
2870        struct compound_hdr hdr = {
2871                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2872        };
2873
2874        encode_compound_hdr(xdr, req, &hdr);
2875        encode_sequence(xdr, &args->seq_args, &hdr);
2876        encode_getdeviceinfo(xdr, args, &hdr);
2877
2878        /* set up reply kvec. Subtract notification bitmap max size (2)
2879         * so that notification bitmap is put in xdr_buf tail */
2880        xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2881                         args->pdev->pages, args->pdev->pgbase,
2882                         args->pdev->pglen);
2883
2884        encode_nops(&hdr);
2885}
2886
2887/*
2888 *  Encode LAYOUTGET request
2889 */
2890static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2891                                   struct xdr_stream *xdr,
2892                                   struct nfs4_layoutget_args *args)
2893{
2894        struct compound_hdr hdr = {
2895                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2896        };
2897
2898        encode_compound_hdr(xdr, req, &hdr);
2899        encode_sequence(xdr, &args->seq_args, &hdr);
2900        encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2901        encode_layoutget(xdr, args, &hdr);
2902
2903        xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2904            args->layout.pages, 0, args->layout.pglen);
2905
2906        encode_nops(&hdr);
2907}
2908
2909/*
2910 *  Encode LAYOUTCOMMIT request
2911 */
2912static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2913                                      struct xdr_stream *xdr,
2914                                      struct nfs4_layoutcommit_args *args)
2915{
2916        struct nfs4_layoutcommit_data *data =
2917                container_of(args, struct nfs4_layoutcommit_data, args);
2918        struct compound_hdr hdr = {
2919                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2920        };
2921
2922        encode_compound_hdr(xdr, req, &hdr);
2923        encode_sequence(xdr, &args->seq_args, &hdr);
2924        encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2925        encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2926        encode_getfattr(xdr, args->bitmask, &hdr);
2927        encode_nops(&hdr);
2928}
2929
2930/*
2931 * Encode LAYOUTRETURN request
2932 */
2933static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2934                                      struct xdr_stream *xdr,
2935                                      struct nfs4_layoutreturn_args *args)
2936{
2937        struct compound_hdr hdr = {
2938                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2939        };
2940
2941        encode_compound_hdr(xdr, req, &hdr);
2942        encode_sequence(xdr, &args->seq_args, &hdr);
2943        encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2944        encode_layoutreturn(xdr, args, &hdr);
2945        encode_nops(&hdr);
2946}
2947
2948/*
2949 * Encode SECINFO_NO_NAME request
2950 */
2951static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
2952                                        struct xdr_stream *xdr,
2953                                        struct nfs41_secinfo_no_name_args *args)
2954{
2955        struct compound_hdr hdr = {
2956                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2957        };
2958
2959        encode_compound_hdr(xdr, req, &hdr);
2960        encode_sequence(xdr, &args->seq_args, &hdr);
2961        encode_putrootfh(xdr, &hdr);
2962        encode_secinfo_no_name(xdr, args, &hdr);
2963        encode_nops(&hdr);
2964        return 0;
2965}
2966
2967/*
2968 *  Encode TEST_STATEID request
2969 */
2970static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
2971                                      struct xdr_stream *xdr,
2972                                      struct nfs41_test_stateid_args *args)
2973{
2974        struct compound_hdr hdr = {
2975                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2976        };
2977
2978        encode_compound_hdr(xdr, req, &hdr);
2979        encode_sequence(xdr, &args->seq_args, &hdr);
2980        encode_test_stateid(xdr, args, &hdr);
2981        encode_nops(&hdr);
2982}
2983
2984/*
2985 *  Encode FREE_STATEID request
2986 */
2987static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
2988                                     struct xdr_stream *xdr,
2989                                     struct nfs41_free_stateid_args *args)
2990{
2991        struct compound_hdr hdr = {
2992                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2993        };
2994
2995        encode_compound_hdr(xdr, req, &hdr);
2996        encode_sequence(xdr, &args->seq_args, &hdr);
2997        encode_free_stateid(xdr, args, &hdr);
2998        encode_nops(&hdr);
2999}
3000#endif /* CONFIG_NFS_V4_1 */

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

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

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

6001        if (status != 0)
6002                goto out;
6003        decode_getfattr(xdr, res->fattr, res->server);
6004out:
6005        return status;
6006}
6007
6008/*
6009 * Decode ACCESS response
6010 */
6011static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6012                               struct nfs4_accessres *res)
6013{
6014        struct compound_hdr hdr;
6015        int status;
6016
6017        status = decode_compound_hdr(xdr, &hdr);
6018        if (status)
6019                goto out;
6020        status = decode_sequence(xdr, &res->seq_res, rqstp);
6021        if (status)
6022                goto out;
6023        status = decode_putfh(xdr);
6024        if (status != 0)
6025                goto out;
6026        status = decode_access(xdr, &res->supported, &res->access);
6027        if (status != 0)
6028                goto out;
6029        decode_getfattr(xdr, res->fattr, res->server);
6030out:
6031        return status;
6032}
6033
6034/*
6035 * Decode LOOKUP response
6036 */
6037static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6038                               struct nfs4_lookup_res *res)
6039{
6040        struct compound_hdr hdr;
6041        int status;
6042
6043        status = decode_compound_hdr(xdr, &hdr);
6044        if (status)
6045                goto out;
6046        status = decode_sequence(xdr, &res->seq_res, rqstp);
6047        if (status)
6048                goto out;
6049        status = decode_putfh(xdr);
6050        if (status)
6051                goto out;
6052        status = decode_lookup(xdr);
6053        if (status)
6054                goto out;
6055        status = decode_getfh(xdr, res->fh);
6056        if (status)
6057                goto out;
6058        status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6059out:
6060        return status;
6061}
6062
6063/*
6064 * Decode LOOKUP_ROOT response
6065 */
6066static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6067                                    struct xdr_stream *xdr,
6068                                    struct nfs4_lookup_res *res)
6069{
6070        struct compound_hdr hdr;
6071        int status;
6072
6073        status = decode_compound_hdr(xdr, &hdr);
6074        if (status)
6075                goto out;
6076        status = decode_sequence(xdr, &res->seq_res, rqstp);
6077        if (status)
6078                goto out;
6079        status = decode_putrootfh(xdr);
6080        if (status)
6081                goto out;
6082        status = decode_getfh(xdr, res->fh);
6083        if (status == 0)
6084                status = decode_getfattr_label(xdr, res->fattr,
6085                                                res->label, res->server);
6086out:
6087        return status;
6088}
6089
6090/*
6091 * Decode REMOVE response
6092 */
6093static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6094                               struct nfs_removeres *res)
6095{
6096        struct compound_hdr hdr;
6097        int status;
6098
6099        status = decode_compound_hdr(xdr, &hdr);
6100        if (status)
6101                goto out;
6102        status = decode_sequence(xdr, &res->seq_res, rqstp);
6103        if (status)
6104                goto out;
6105        status = decode_putfh(xdr);
6106        if (status)
6107                goto out;
6108        status = decode_remove(xdr, &res->cinfo);
6109out:
6110        return status;
6111}
6112
6113/*
6114 * Decode RENAME response
6115 */
6116static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6117                               struct nfs_renameres *res)
6118{
6119        struct compound_hdr hdr;
6120        int status;
6121
6122        status = decode_compound_hdr(xdr, &hdr);
6123        if (status)
6124                goto out;
6125        status = decode_sequence(xdr, &res->seq_res, rqstp);
6126        if (status)
6127                goto out;
6128        status = decode_putfh(xdr);
6129        if (status)
6130                goto out;
6131        status = decode_savefh(xdr);
6132        if (status)
6133                goto out;
6134        status = decode_putfh(xdr);
6135        if (status)
6136                goto out;
6137        status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6138out:
6139        return status;
6140}
6141
6142/*
6143 * Decode LINK response
6144 */
6145static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6146                             struct nfs4_link_res *res)
6147{
6148        struct compound_hdr hdr;
6149        int status;
6150
6151        status = decode_compound_hdr(xdr, &hdr);
6152        if (status)
6153                goto out;
6154        status = decode_sequence(xdr, &res->seq_res, rqstp);
6155        if (status)
6156                goto out;
6157        status = decode_putfh(xdr);
6158        if (status)
6159                goto out;
6160        status = decode_savefh(xdr);
6161        if (status)
6162                goto out;
6163        status = decode_putfh(xdr);
6164        if (status)
6165                goto out;
6166        status = decode_link(xdr, &res->cinfo);
6167        if (status)
6168                goto out;
6169        /*
6170         * Note order: OP_LINK leaves the directory as the current
6171         *             filehandle.
6172         */
6173        status = decode_restorefh(xdr);
6174        if (status)
6175                goto out;
6176        decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6177out:
6178        return status;
6179}
6180
6181/*
6182 * Decode CREATE response
6183 */
6184static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6185                               struct nfs4_create_res *res)
6186{
6187        struct compound_hdr hdr;
6188        int status;
6189
6190        status = decode_compound_hdr(xdr, &hdr);
6191        if (status)
6192                goto out;
6193        status = decode_sequence(xdr, &res->seq_res, rqstp);
6194        if (status)
6195                goto out;
6196        status = decode_putfh(xdr);
6197        if (status)
6198                goto out;
6199        status = decode_create(xdr, &res->dir_cinfo);
6200        if (status)
6201                goto out;
6202        status = decode_getfh(xdr, res->fh);
6203        if (status)
6204                goto out;
6205        decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6206out:
6207        return status;
6208}
6209
6210/*
6211 * Decode SYMLINK response
6212 */
6213static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6214                                struct nfs4_create_res *res)
6215{
6216        return nfs4_xdr_dec_create(rqstp, xdr, res);
6217}
6218
6219/*
6220 * Decode GETATTR response
6221 */
6222static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6223                                struct nfs4_getattr_res *res)
6224{
6225        struct compound_hdr hdr;
6226        int status;
6227
6228        status = decode_compound_hdr(xdr, &hdr);
6229        if (status)
6230                goto out;
6231        status = decode_sequence(xdr, &res->seq_res, rqstp);
6232        if (status)
6233                goto out;
6234        status = decode_putfh(xdr);
6235        if (status)
6236                goto out;
6237        status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6238out:
6239        return status;
6240}
6241
6242/*
6243 * Encode an SETACL request
6244 */
6245static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6246                                struct nfs_setaclargs *args)
6247{
6248        struct compound_hdr hdr = {
6249                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6250        };
6251
6252        encode_compound_hdr(xdr, req, &hdr);
6253        encode_sequence(xdr, &args->seq_args, &hdr);
6254        encode_putfh(xdr, args->fh, &hdr);
6255        encode_setacl(xdr, args, &hdr);
6256        encode_nops(&hdr);
6257}
6258
6259/*
6260 * Decode SETACL response
6261 */
6262static int
6263nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6264                    struct nfs_setaclres *res)
6265{
6266        struct compound_hdr hdr;
6267        int status;
6268
6269        status = decode_compound_hdr(xdr, &hdr);
6270        if (status)
6271                goto out;
6272        status = decode_sequence(xdr, &res->seq_res, rqstp);
6273        if (status)
6274                goto out;
6275        status = decode_putfh(xdr);
6276        if (status)
6277                goto out;
6278        status = decode_setattr(xdr);
6279out:
6280        return status;
6281}
6282
6283/*
6284 * Decode GETACL response
6285 */
6286static int
6287nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6288                    struct nfs_getaclres *res)
6289{
6290        struct compound_hdr hdr;
6291        int status;
6292
6293        if (res->acl_scratch != NULL) {
6294                void *p = page_address(res->acl_scratch);
6295                xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6296        }
6297        status = decode_compound_hdr(xdr, &hdr);
6298        if (status)
6299                goto out;
6300        status = decode_sequence(xdr, &res->seq_res, rqstp);
6301        if (status)
6302                goto out;
6303        status = decode_putfh(xdr);
6304        if (status)
6305                goto out;
6306        status = decode_getacl(xdr, rqstp, res);
6307
6308out:
6309        return status;
6310}
6311
6312/*
6313 * Decode CLOSE response
6314 */
6315static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6316                              struct nfs_closeres *res)
6317{
6318        struct compound_hdr hdr;
6319        int status;
6320
6321        status = decode_compound_hdr(xdr, &hdr);
6322        if (status)
6323                goto out;
6324        status = decode_sequence(xdr, &res->seq_res, rqstp);
6325        if (status)
6326                goto out;
6327        status = decode_putfh(xdr);
6328        if (status)
6329                goto out;
6330        status = decode_close(xdr, res);
6331        if (status != 0)
6332                goto out;
6333        /*
6334         * Note: Server may do delete on close for this file
6335         *      in which case the getattr call will fail with
6336         *      an ESTALE error. Shouldn't be a problem,
6337         *      though, since fattr->valid will remain unset.
6338         */
6339        decode_getfattr(xdr, res->fattr, res->server);
6340out:
6341        return status;
6342}
6343
6344/*
6345 * Decode OPEN response
6346 */
6347static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6348                             struct nfs_openres *res)
6349{
6350        struct compound_hdr hdr;
6351        int status;
6352
6353        status = decode_compound_hdr(xdr, &hdr);
6354        if (status)
6355                goto out;
6356        status = decode_sequence(xdr, &res->seq_res, rqstp);
6357        if (status)
6358                goto out;
6359        status = decode_putfh(xdr);
6360        if (status)
6361                goto out;
6362        status = decode_open(xdr, res);
6363        if (status)
6364                goto out;
6365        status = decode_getfh(xdr, &res->fh);
6366        if (status)
6367                goto out;
6368        if (res->access_request)
6369                decode_access(xdr, &res->access_supported, &res->access_result);
6370        decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6371out:
6372        return status;
6373}
6374
6375/*
6376 * Decode OPEN_CONFIRM response
6377 */
6378static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6379                                     struct xdr_stream *xdr,
6380                                     struct nfs_open_confirmres *res)
6381{
6382        struct compound_hdr hdr;
6383        int status;
6384
6385        status = decode_compound_hdr(xdr, &hdr);
6386        if (status)
6387                goto out;
6388        status = decode_putfh(xdr);
6389        if (status)
6390                goto out;
6391        status = decode_open_confirm(xdr, res);
6392out:
6393        return status;
6394}
6395
6396/*
6397 * Decode OPEN response
6398 */
6399static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6400                                    struct xdr_stream *xdr,
6401                                    struct nfs_openres *res)
6402{
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_open(xdr, res);
6416        if (status)
6417                goto out;
6418        if (res->access_request)
6419                decode_access(xdr, &res->access_supported, &res->access_result);
6420        decode_getfattr(xdr, res->f_attr, res->server);
6421out:
6422        return status;
6423}
6424
6425/*
6426 * Decode SETATTR response
6427 */
6428static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6429                                struct xdr_stream *xdr,
6430                                struct nfs_setattrres *res)
6431{
6432        struct compound_hdr hdr;
6433        int status;
6434
6435        status = decode_compound_hdr(xdr, &hdr);
6436        if (status)
6437                goto out;
6438        status = decode_sequence(xdr, &res->seq_res, rqstp);
6439        if (status)
6440                goto out;
6441        status = decode_putfh(xdr);
6442        if (status)
6443                goto out;
6444        status = decode_setattr(xdr);
6445        if (status)
6446                goto out;
6447        decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6448out:
6449        return status;
6450}
6451
6452/*
6453 * Decode LOCK response
6454 */
6455static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6456                             struct nfs_lock_res *res)
6457{
6458        struct compound_hdr hdr;
6459        int status;
6460
6461        status = decode_compound_hdr(xdr, &hdr);
6462        if (status)
6463                goto out;
6464        status = decode_sequence(xdr, &res->seq_res, rqstp);
6465        if (status)
6466                goto out;
6467        status = decode_putfh(xdr);
6468        if (status)
6469                goto out;
6470        status = decode_lock(xdr, res);
6471out:
6472        return status;
6473}
6474
6475/*
6476 * Decode LOCKT response
6477 */
6478static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6479                              struct nfs_lockt_res *res)
6480{
6481        struct compound_hdr hdr;
6482        int status;
6483
6484        status = decode_compound_hdr(xdr, &hdr);
6485        if (status)
6486                goto out;
6487        status = decode_sequence(xdr, &res->seq_res, rqstp);
6488        if (status)
6489                goto out;
6490        status = decode_putfh(xdr);
6491        if (status)
6492                goto out;
6493        status = decode_lockt(xdr, res);
6494out:
6495        return status;
6496}
6497
6498/*
6499 * Decode LOCKU response
6500 */
6501static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6502                              struct nfs_locku_res *res)
6503{
6504        struct compound_hdr hdr;
6505        int status;
6506
6507        status = decode_compound_hdr(xdr, &hdr);
6508        if (status)
6509                goto out;
6510        status = decode_sequence(xdr, &res->seq_res, rqstp);
6511        if (status)
6512                goto out;
6513        status = decode_putfh(xdr);
6514        if (status)
6515                goto out;
6516        status = decode_locku(xdr, res);
6517out:
6518        return status;
6519}
6520
6521static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6522                                          struct xdr_stream *xdr, void *dummy)
6523{
6524        struct compound_hdr hdr;
6525        int status;
6526
6527        status = decode_compound_hdr(xdr, &hdr);
6528        if (!status)
6529                status = decode_release_lockowner(xdr);
6530        return status;
6531}
6532
6533/*
6534 * Decode READLINK response
6535 */
6536static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6537                                 struct xdr_stream *xdr,
6538                                 struct nfs4_readlink_res *res)
6539{
6540        struct compound_hdr hdr;
6541        int status;
6542
6543        status = decode_compound_hdr(xdr, &hdr);
6544        if (status)
6545                goto out;
6546        status = decode_sequence(xdr, &res->seq_res, rqstp);
6547        if (status)
6548                goto out;
6549        status = decode_putfh(xdr);
6550        if (status)
6551                goto out;
6552        status = decode_readlink(xdr, rqstp);
6553out:
6554        return status;
6555}
6556
6557/*
6558 * Decode READDIR response
6559 */
6560static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6561                                struct nfs4_readdir_res *res)
6562{
6563        struct compound_hdr hdr;
6564        int status;
6565
6566        status = decode_compound_hdr(xdr, &hdr);
6567        if (status)
6568                goto out;
6569        status = decode_sequence(xdr, &res->seq_res, rqstp);
6570        if (status)
6571                goto out;
6572        status = decode_putfh(xdr);
6573        if (status)
6574                goto out;
6575        status = decode_readdir(xdr, rqstp, res);
6576out:
6577        return status;
6578}
6579
6580/*
6581 * Decode Read response
6582 */
6583static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6584                             struct nfs_pgio_res *res)
6585{
6586        struct compound_hdr hdr;
6587        int status;
6588
6589        status = decode_compound_hdr(xdr, &hdr);
6590        res->op_status = hdr.status;
6591        if (status)
6592                goto out;
6593        status = decode_sequence(xdr, &res->seq_res, rqstp);
6594        if (status)
6595                goto out;
6596        status = decode_putfh(xdr);
6597        if (status)
6598                goto out;
6599        status = decode_read(xdr, rqstp, res);
6600        if (!status)
6601                status = res->count;
6602out:
6603        return status;
6604}
6605
6606/*
6607 * Decode WRITE response
6608 */
6609static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6610                              struct nfs_pgio_res *res)
6611{
6612        struct compound_hdr hdr;
6613        int status;
6614
6615        status = decode_compound_hdr(xdr, &hdr);
6616        res->op_status = hdr.status;
6617        if (status)
6618                goto out;
6619        status = decode_sequence(xdr, &res->seq_res, rqstp);
6620        if (status)
6621                goto out;
6622        status = decode_putfh(xdr);
6623        if (status)
6624                goto out;
6625        status = decode_write(xdr, res);
6626        if (status)
6627                goto out;
6628        if (res->fattr)
6629                decode_getfattr(xdr, res->fattr, res->server);
6630        if (!status)
6631                status = res->count;
6632out:
6633        return status;
6634}
6635
6636/*
6637 * Decode COMMIT response
6638 */
6639static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6640                               struct nfs_commitres *res)
6641{
6642        struct compound_hdr hdr;
6643        int status;
6644
6645        status = decode_compound_hdr(xdr, &hdr);
6646        res->op_status = hdr.status;
6647        if (status)
6648                goto out;
6649        status = decode_sequence(xdr, &res->seq_res, rqstp);
6650        if (status)
6651                goto out;
6652        status = decode_putfh(xdr);
6653        if (status)
6654                goto out;
6655        status = decode_commit(xdr, res);
6656out:
6657        return status;
6658}
6659
6660/*
6661 * Decode FSINFO response
6662 */
6663static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6664                               struct nfs4_fsinfo_res *res)
6665{
6666        struct compound_hdr hdr;
6667        int status;
6668
6669        status = decode_compound_hdr(xdr, &hdr);
6670        if (!status)
6671                status = decode_sequence(xdr, &res->seq_res, req);
6672        if (!status)
6673                status = decode_putfh(xdr);
6674        if (!status)
6675                status = decode_fsinfo(xdr, res->fsinfo);
6676        return status;
6677}
6678
6679/*
6680 * Decode PATHCONF response
6681 */
6682static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6683                                 struct nfs4_pathconf_res *res)
6684{
6685        struct compound_hdr hdr;
6686        int status;
6687
6688        status = decode_compound_hdr(xdr, &hdr);
6689        if (!status)
6690                status = decode_sequence(xdr, &res->seq_res, req);
6691        if (!status)
6692                status = decode_putfh(xdr);
6693        if (!status)
6694                status = decode_pathconf(xdr, res->pathconf);
6695        return status;
6696}
6697
6698/*
6699 * Decode STATFS response
6700 */
6701static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6702                               struct nfs4_statfs_res *res)
6703{
6704        struct compound_hdr hdr;
6705        int status;
6706
6707        status = decode_compound_hdr(xdr, &hdr);
6708        if (!status)
6709                status = decode_sequence(xdr, &res->seq_res, req);
6710        if (!status)
6711                status = decode_putfh(xdr);
6712        if (!status)
6713                status = decode_statfs(xdr, res->fsstat);
6714        return status;
6715}
6716
6717/*
6718 * Decode GETATTR_BITMAP response
6719 */
6720static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6721                                    struct xdr_stream *xdr,
6722                                    struct nfs4_server_caps_res *res)
6723{
6724        struct compound_hdr hdr;
6725        int status;
6726
6727        status = decode_compound_hdr(xdr, &hdr);
6728        if (status)
6729                goto out;
6730        status = decode_sequence(xdr, &res->seq_res, req);
6731        if (status)
6732                goto out;
6733        status = decode_putfh(xdr);
6734        if (status)
6735                goto out;
6736        status = decode_server_caps(xdr, res);
6737out:
6738        return status;
6739}
6740
6741/*
6742 * Decode RENEW response
6743 */
6744static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6745                              void *__unused)
6746{
6747        struct compound_hdr hdr;
6748        int status;
6749
6750        status = decode_compound_hdr(xdr, &hdr);
6751        if (!status)
6752                status = decode_renew(xdr);
6753        return status;
6754}
6755
6756/*
6757 * Decode SETCLIENTID response
6758 */
6759static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6760                                    struct xdr_stream *xdr,
6761                                    struct nfs4_setclientid_res *res)
6762{
6763        struct compound_hdr hdr;
6764        int status;
6765
6766        status = decode_compound_hdr(xdr, &hdr);
6767        if (!status)
6768                status = decode_setclientid(xdr, res);
6769        return status;
6770}
6771
6772/*
6773 * Decode SETCLIENTID_CONFIRM response
6774 */
6775static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6776                                            struct xdr_stream *xdr)
6777{
6778        struct compound_hdr hdr;
6779        int status;
6780
6781        status = decode_compound_hdr(xdr, &hdr);
6782        if (!status)
6783                status = decode_setclientid_confirm(xdr);
6784        return status;
6785}
6786
6787/*
6788 * Decode DELEGRETURN response
6789 */
6790static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6791                                    struct xdr_stream *xdr,
6792                                    struct nfs4_delegreturnres *res)
6793{
6794        struct compound_hdr hdr;
6795        int status;
6796
6797        status = decode_compound_hdr(xdr, &hdr);
6798        if (status)
6799                goto out;
6800        status = decode_sequence(xdr, &res->seq_res, rqstp);
6801        if (status)
6802                goto out;
6803        status = decode_putfh(xdr);
6804        if (status != 0)
6805                goto out;
6806        status = decode_getfattr(xdr, res->fattr, res->server);
6807        if (status != 0)
6808                goto out;
6809        status = decode_delegreturn(xdr);
6810out:
6811        return status;
6812}
6813
6814/*
6815 * Decode FS_LOCATIONS response
6816 */
6817static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6818                                     struct xdr_stream *xdr,
6819                                     struct nfs4_fs_locations_res *res)
6820{
6821        struct compound_hdr hdr;
6822        int status;
6823
6824        status = decode_compound_hdr(xdr, &hdr);
6825        if (status)
6826                goto out;
6827        status = decode_sequence(xdr, &res->seq_res, req);
6828        if (status)
6829                goto out;
6830        status = decode_putfh(xdr);
6831        if (status)
6832                goto out;
6833        if (res->migration) {
6834                xdr_enter_page(xdr, PAGE_SIZE);
6835                status = decode_getfattr_generic(xdr,
6836                                        &res->fs_locations->fattr,
6837                                         NULL, res->fs_locations,
6838                                         NULL, res->fs_locations->server);
6839                if (status)
6840                        goto out;
6841                if (res->renew)
6842                        status = decode_renew(xdr);
6843        } else {
6844                status = decode_lookup(xdr);
6845                if (status)
6846                        goto out;
6847                xdr_enter_page(xdr, PAGE_SIZE);
6848                status = decode_getfattr_generic(xdr,
6849                                        &res->fs_locations->fattr,
6850                                         NULL, res->fs_locations,
6851                                         NULL, res->fs_locations->server);
6852        }
6853out:
6854        return status;
6855}
6856
6857/*
6858 * Decode SECINFO response
6859 */
6860static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6861                                struct xdr_stream *xdr,
6862                                struct nfs4_secinfo_res *res)
6863{
6864        struct compound_hdr hdr;
6865        int status;
6866
6867        status = decode_compound_hdr(xdr, &hdr);
6868        if (status)
6869                goto out;
6870        status = decode_sequence(xdr, &res->seq_res, rqstp);
6871        if (status)
6872                goto out;
6873        status = decode_putfh(xdr);
6874        if (status)
6875                goto out;
6876        status = decode_secinfo(xdr, res);
6877out:
6878        return status;
6879}
6880
6881/*
6882 * Decode FSID_PRESENT response
6883 */
6884static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
6885                                     struct xdr_stream *xdr,
6886                                     struct nfs4_fsid_present_res *res)
6887{
6888        struct compound_hdr hdr;
6889        int status;
6890
6891        status = decode_compound_hdr(xdr, &hdr);
6892        if (status)
6893                goto out;
6894        status = decode_sequence(xdr, &res->seq_res, rqstp);
6895        if (status)
6896                goto out;
6897        status = decode_putfh(xdr);
6898        if (status)
6899                goto out;
6900        status = decode_getfh(xdr, res->fh);
6901        if (status)
6902                goto out;
6903        if (res->renew)
6904                status = decode_renew(xdr);
6905out:
6906        return status;
6907}
6908
6909#if defined(CONFIG_NFS_V4_1)
6910/*
6911 * Decode BIND_CONN_TO_SESSION response
6912 */
6913static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
6914                                        struct xdr_stream *xdr,
6915                                        void *res)
6916{
6917        struct compound_hdr hdr;
6918        int status;
6919
6920        status = decode_compound_hdr(xdr, &hdr);
6921        if (!status)
6922                status = decode_bind_conn_to_session(xdr, res);
6923        return status;
6924}
6925
6926/*
6927 * Decode EXCHANGE_ID response
6928 */
6929static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
6930                                    struct xdr_stream *xdr,
6931                                    void *res)
6932{
6933        struct compound_hdr hdr;
6934        int status;
6935
6936        status = decode_compound_hdr(xdr, &hdr);
6937        if (!status)
6938                status = decode_exchange_id(xdr, res);
6939        return status;
6940}
6941
6942/*
6943 * Decode CREATE_SESSION response
6944 */
6945static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
6946                                       struct xdr_stream *xdr,
6947                                       struct nfs41_create_session_res *res)
6948{
6949        struct compound_hdr hdr;
6950        int status;
6951
6952        status = decode_compound_hdr(xdr, &hdr);
6953        if (!status)
6954                status = decode_create_session(xdr, res);
6955        return status;
6956}
6957
6958/*
6959 * Decode DESTROY_SESSION response
6960 */
6961static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
6962                                        struct xdr_stream *xdr,
6963                                        void *res)
6964{
6965        struct compound_hdr hdr;
6966        int status;
6967
6968        status = decode_compound_hdr(xdr, &hdr);
6969        if (!status)
6970                status = decode_destroy_session(xdr, res);
6971        return status;
6972}
6973
6974/*
6975 * Decode DESTROY_CLIENTID response
6976 */
6977static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
6978                                        struct xdr_stream *xdr,
6979                                        void *res)
6980{
6981        struct compound_hdr hdr;
6982        int status;
6983
6984        status = decode_compound_hdr(xdr, &hdr);
6985        if (!status)
6986                status = decode_destroy_clientid(xdr, res);
6987        return status;
6988}
6989
6990/*
6991 * Decode SEQUENCE response
6992 */
6993static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
6994                                 struct xdr_stream *xdr,
6995                                 struct nfs4_sequence_res *res)
6996{
6997        struct compound_hdr hdr;
6998        int status;
6999
7000        status = decode_compound_hdr(xdr, &hdr);

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