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 nfstime4_maxsz          (3)
 102#define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
 103#define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
 104#define nfs4_owner_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 105#define nfs4_group_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 106#ifdef CONFIG_NFS_V4_SECURITY_LABEL
 107/* PI(4 bytes) + LFS(4 bytes) + 1(for null terminator?) + MAXLABELLEN */
 108#define nfs4_label_maxsz        (4 + 4 + 1 + XDR_QUADLEN(NFS4_MAXLABELLEN))
 109#else
 110#define nfs4_label_maxsz        0
 111#endif
 112/* We support only one layout type per file system */
 113#define decode_mdsthreshold_maxsz (1 + 1 + nfs4_fattr_bitmap_maxsz + 1 + 8)
 114/* This is based on getfattr, which uses the most attributes: */
 115#define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
 116                                3*nfstime4_maxsz + \
 117                                nfs4_owner_maxsz + \
 118                                nfs4_group_maxsz + nfs4_label_maxsz + \
 119                                 decode_mdsthreshold_maxsz))
 120#define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
 121                                nfs4_fattr_value_maxsz)
 122#define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
 123#define encode_attrs_maxsz      (nfs4_fattr_bitmap_maxsz + \
 124                                 1 + 2 + 1 + \
 125                                nfs4_owner_maxsz + \
 126                                nfs4_group_maxsz + \
 127                                nfs4_label_maxsz + \
 128                                1 + nfstime4_maxsz + \
 129                                1 + nfstime4_maxsz)
 130#define encode_savefh_maxsz     (op_encode_hdr_maxsz)
 131#define decode_savefh_maxsz     (op_decode_hdr_maxsz)
 132#define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
 133#define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 134#define encode_fsinfo_maxsz     (encode_getattr_maxsz)
 135/* The 5 accounts for the PNFS attributes, and assumes that at most three
 136 * layout types will be returned.
 137 */
 138#define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + \
 139                                 nfs4_fattr_bitmap_maxsz + 4 + 8 + 5)
 140#define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 141#define decode_renew_maxsz      (op_decode_hdr_maxsz)
 142#define encode_setclientid_maxsz \
 143                                (op_encode_hdr_maxsz + \
 144                                XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 145                                /* client name */ \
 146                                1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 147                                1 /* sc_prog */ + \
 148                                1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 149                                1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
 150                                1) /* sc_cb_ident */
 151#define decode_setclientid_maxsz \
 152                                (op_decode_hdr_maxsz + \
 153                                2 /* clientid */ + \
 154                                XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 155                                1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 156                                1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN))
 157#define encode_setclientid_confirm_maxsz \
 158                                (op_encode_hdr_maxsz + \
 159                                3 + (NFS4_VERIFIER_SIZE >> 2))
 160#define decode_setclientid_confirm_maxsz \
 161                                (op_decode_hdr_maxsz)
 162#define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
 163#define decode_lookup_maxsz     (op_decode_hdr_maxsz)
 164#define encode_lookupp_maxsz    (op_encode_hdr_maxsz)
 165#define decode_lookupp_maxsz    (op_decode_hdr_maxsz)
 166#define encode_share_access_maxsz \
 167                                (2)
 168#define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
 169#define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
 170#define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
 171#define encode_open_maxsz       (op_encode_hdr_maxsz + \
 172                                2 + encode_share_access_maxsz + 2 + \
 173                                open_owner_id_maxsz + \
 174                                encode_opentype_maxsz + \
 175                                encode_claim_null_maxsz)
 176#define decode_space_limit_maxsz        (3)
 177#define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
 178#define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
 179                                decode_space_limit_maxsz + \
 180                                decode_ace_maxsz)
 181#define decode_change_info_maxsz        (5)
 182#define decode_open_maxsz       (op_decode_hdr_maxsz + \
 183                                decode_stateid_maxsz + \
 184                                decode_change_info_maxsz + 1 + \
 185                                nfs4_fattr_bitmap_maxsz + \
 186                                decode_delegation_maxsz)
 187#define encode_open_confirm_maxsz \
 188                                (op_encode_hdr_maxsz + \
 189                                 encode_stateid_maxsz + 1)
 190#define decode_open_confirm_maxsz \
 191                                (op_decode_hdr_maxsz + \
 192                                 decode_stateid_maxsz)
 193#define encode_open_downgrade_maxsz \
 194                                (op_encode_hdr_maxsz + \
 195                                 encode_stateid_maxsz + 1 + \
 196                                 encode_share_access_maxsz)
 197#define decode_open_downgrade_maxsz \
 198                                (op_decode_hdr_maxsz + \
 199                                 decode_stateid_maxsz)
 200#define encode_close_maxsz      (op_encode_hdr_maxsz + \
 201                                 1 + encode_stateid_maxsz)
 202#define decode_close_maxsz      (op_decode_hdr_maxsz + \
 203                                 decode_stateid_maxsz)
 204#define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
 205                                 encode_stateid_maxsz + \
 206                                 encode_attrs_maxsz)
 207#define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
 208                                 nfs4_fattr_bitmap_maxsz)
 209#define encode_read_maxsz       (op_encode_hdr_maxsz + \
 210                                 encode_stateid_maxsz + 3)
 211#define decode_read_maxsz       (op_decode_hdr_maxsz + 2)
 212#define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
 213                                 2 + encode_verifier_maxsz + 5 + \
 214                                nfs4_label_maxsz)
 215#define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
 216                                 decode_verifier_maxsz)
 217#define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 218#define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1)
 219#define encode_write_maxsz      (op_encode_hdr_maxsz + \
 220                                 encode_stateid_maxsz + 4)
 221#define decode_write_maxsz      (op_decode_hdr_maxsz + \
 222                                 2 + decode_verifier_maxsz)
 223#define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
 224#define decode_commit_maxsz     (op_decode_hdr_maxsz + \
 225                                 decode_verifier_maxsz)
 226#define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 227                                nfs4_name_maxsz)
 228#define decode_remove_maxsz     (op_decode_hdr_maxsz + \
 229                                 decode_change_info_maxsz)
 230#define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 231                                2 * nfs4_name_maxsz)
 232#define decode_rename_maxsz     (op_decode_hdr_maxsz + \
 233                                 decode_change_info_maxsz + \
 234                                 decode_change_info_maxsz)
 235#define encode_link_maxsz       (op_encode_hdr_maxsz + \
 236                                nfs4_name_maxsz)
 237#define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
 238#define encode_lockowner_maxsz  (7)
 239#define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 240                                 7 + \
 241                                 1 + encode_stateid_maxsz + 1 + \
 242                                 encode_lockowner_maxsz)
 243#define decode_lock_denied_maxsz \
 244                                (8 + decode_lockowner_maxsz)
 245#define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 246                                 decode_lock_denied_maxsz)
 247#define encode_lockt_maxsz      (op_encode_hdr_maxsz + 5 + \
 248                                encode_lockowner_maxsz)
 249#define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 250                                 decode_lock_denied_maxsz)
 251#define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 252                                 encode_stateid_maxsz + \
 253                                 4)
 254#define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 255                                 decode_stateid_maxsz)
 256#define encode_release_lockowner_maxsz \
 257                                (op_encode_hdr_maxsz + \
 258                                 encode_lockowner_maxsz)
 259#define decode_release_lockowner_maxsz \
 260                                (op_decode_hdr_maxsz)
 261#define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 262#define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 263#define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 264                                1 + nfs4_name_maxsz + \
 265                                1 + \
 266                                nfs4_fattr_maxsz)
 267#define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 268#define encode_create_maxsz     (op_encode_hdr_maxsz + \
 269                                1 + 2 + nfs4_name_maxsz + \
 270                                encode_attrs_maxsz)
 271#define decode_create_maxsz     (op_decode_hdr_maxsz + \
 272                                decode_change_info_maxsz + \
 273                                nfs4_fattr_bitmap_maxsz)
 274#define encode_statfs_maxsz     (encode_getattr_maxsz)
 275#define decode_statfs_maxsz     (decode_getattr_maxsz)
 276#define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 277#define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 278#define encode_getacl_maxsz     (encode_getattr_maxsz)
 279#define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 280                                 nfs4_fattr_bitmap_maxsz + 1)
 281#define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 282                                 encode_stateid_maxsz + 3)
 283#define decode_setacl_maxsz     (decode_setattr_maxsz)
 284#define encode_fs_locations_maxsz \
 285                                (encode_getattr_maxsz)
 286#define decode_fs_locations_maxsz \
 287                                (0)
 288#define encode_secinfo_maxsz    (op_encode_hdr_maxsz + nfs4_name_maxsz)
 289#define decode_secinfo_maxsz    (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
 290
 291#if defined(CONFIG_NFS_V4_1)
 292#define NFS4_MAX_MACHINE_NAME_LEN (64)
 293#define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \
 294                         sizeof(utsname()->version) + sizeof(utsname()->machine) + 8)
 295
 296#define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
 297                                encode_verifier_maxsz + \
 298                                1 /* co_ownerid.len */ + \
 299                                /* eia_clientowner */ \
 300                                1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 301                                1 /* flags */ + \
 302                                1 /* spa_how */ + \
 303                                /* max is SP4_MACH_CRED (for now) */ + \
 304                                1 + NFS4_OP_MAP_NUM_WORDS + \
 305                                1 + NFS4_OP_MAP_NUM_WORDS + \
 306                                1 /* implementation id array of size 1 */ + \
 307                                1 /* nii_domain */ + \
 308                                XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 309                                1 /* nii_name */ + \
 310                                XDR_QUADLEN(IMPL_NAME_LIMIT) + \
 311                                3 /* nii_date */)
 312#define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
 313                                2 /* eir_clientid */ + \
 314                                1 /* eir_sequenceid */ + \
 315                                1 /* eir_flags */ + \
 316                                1 /* spr_how */ + \
 317                                  /* max is SP4_MACH_CRED (for now) */ + \
 318                                1 + NFS4_OP_MAP_NUM_WORDS + \
 319                                1 + NFS4_OP_MAP_NUM_WORDS + \
 320                                2 /* eir_server_owner.so_minor_id */ + \
 321                                /* eir_server_owner.so_major_id<> */ \
 322                                XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 323                                /* eir_server_scope<> */ \
 324                                XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 325                                1 /* eir_server_impl_id array length */ + \
 326                                1 /* nii_domain */ + \
 327                                XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 328                                1 /* nii_name */ + \
 329                                XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 330                                3 /* nii_date */)
 331#define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
 332#define decode_channel_attrs_maxsz  (6 + \
 333                                     1 /* ca_rdma_ird.len */ + \
 334                                     1 /* ca_rdma_ird */)
 335#define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
 336                                     2 /* csa_clientid */ + \
 337                                     1 /* csa_sequence */ + \
 338                                     1 /* csa_flags */ + \
 339                                     encode_channel_attrs_maxsz + \
 340                                     encode_channel_attrs_maxsz + \
 341                                     1 /* csa_cb_program */ + \
 342                                     1 /* csa_sec_parms.len (1) */ + \
 343                                     1 /* cb_secflavor (AUTH_SYS) */ + \
 344                                     1 /* stamp */ + \
 345                                     1 /* machinename.len */ + \
 346                                     XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
 347                                     1 /* uid */ + \
 348                                     1 /* gid */ + \
 349                                     1 /* gids.len (0) */)
 350#define decode_create_session_maxsz  (op_decode_hdr_maxsz +     \
 351                                     XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 352                                     1 /* csr_sequence */ + \
 353                                     1 /* csr_flags */ + \
 354                                     decode_channel_attrs_maxsz + \
 355                                     decode_channel_attrs_maxsz)
 356#define encode_bind_conn_to_session_maxsz  (op_encode_hdr_maxsz + \
 357                                     /* bctsa_sessid */ \
 358                                     XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 359                                     1 /* bctsa_dir */ + \
 360                                     1 /* bctsa_use_conn_in_rdma_mode */)
 361#define decode_bind_conn_to_session_maxsz  (op_decode_hdr_maxsz +       \
 362                                     /* bctsr_sessid */ \
 363                                     XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 364                                     1 /* bctsr_dir */ + \
 365                                     1 /* bctsr_use_conn_in_rdma_mode */)
 366#define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
 367#define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
 368#define encode_destroy_clientid_maxsz   (op_encode_hdr_maxsz + 2)
 369#define decode_destroy_clientid_maxsz   (op_decode_hdr_maxsz)
 370#define encode_sequence_maxsz   (op_encode_hdr_maxsz + \
 371                                XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
 372#define decode_sequence_maxsz   (op_decode_hdr_maxsz + \
 373                                XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
 374#define encode_reclaim_complete_maxsz   (op_encode_hdr_maxsz + 4)
 375#define decode_reclaim_complete_maxsz   (op_decode_hdr_maxsz + 4)
 376#define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + \
 377                                XDR_QUADLEN(NFS4_DEVICEID4_SIZE) + \
 378                                1 /* layout type */ + \
 379                                1 /* maxcount */ + \
 380                                1 /* bitmap size */ + \
 381                                1 /* notification bitmap length */ + \
 382                                1 /* notification bitmap, word 0 */)
 383#define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
 384                                1 /* layout type */ + \
 385                                1 /* opaque devaddr4 length */ + \
 386                                  /* devaddr4 payload is read into page */ \
 387                                1 /* notification bitmap length */ + \
 388                                1 /* notification bitmap, word 0 */)
 389#define encode_layoutget_maxsz  (op_encode_hdr_maxsz + 10 + \
 390                                encode_stateid_maxsz)
 391#define decode_layoutget_maxsz  (op_decode_hdr_maxsz + 8 + \
 392                                decode_stateid_maxsz + \
 393                                XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
 394#define encode_layoutcommit_maxsz (op_encode_hdr_maxsz +          \
 395                                2 /* offset */ + \
 396                                2 /* length */ + \
 397                                1 /* reclaim */ + \
 398                                encode_stateid_maxsz + \
 399                                1 /* new offset (true) */ + \
 400                                2 /* last byte written */ + \
 401                                1 /* nt_timechanged (false) */ + \
 402                                1 /* layoutupdate4 layout type */ + \
 403                                1 /* layoutupdate4 opaqueue len */)
 404                                  /* the actual content of layoutupdate4 should
 405                                     be allocated by drivers and spliced in
 406                                     using xdr_write_pages */
 407#define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
 408#define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
 409                                encode_stateid_maxsz + \
 410                                1 + \
 411                                XDR_QUADLEN(NFS4_OPAQUE_LIMIT))
 412#define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
 413                                1 + decode_stateid_maxsz)
 414#define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
 415#define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
 416#define encode_test_stateid_maxsz       (op_encode_hdr_maxsz + 2 + \
 417                                         XDR_QUADLEN(NFS4_STATEID_SIZE))
 418#define decode_test_stateid_maxsz       (op_decode_hdr_maxsz + 2 + 1)
 419#define encode_free_stateid_maxsz       (op_encode_hdr_maxsz + 1 + \
 420                                         XDR_QUADLEN(NFS4_STATEID_SIZE))
 421#define decode_free_stateid_maxsz       (op_decode_hdr_maxsz)
 422#else /* CONFIG_NFS_V4_1 */
 423#define encode_sequence_maxsz   0
 424#define decode_sequence_maxsz   0
 425#define encode_layoutreturn_maxsz 0
 426#define decode_layoutreturn_maxsz 0
 427#endif /* CONFIG_NFS_V4_1 */
 428
 429#define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 430#define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 431#define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 432                                encode_sequence_maxsz + \
 433                                encode_putfh_maxsz + \
 434                                encode_read_maxsz)
 435#define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 436                                decode_sequence_maxsz + \
 437                                decode_putfh_maxsz + \
 438                                decode_read_maxsz)
 439#define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 440                                encode_sequence_maxsz + \
 441                                encode_putfh_maxsz + \
 442                                encode_readlink_maxsz)
 443#define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 444                                decode_sequence_maxsz + \
 445                                decode_putfh_maxsz + \
 446                                decode_readlink_maxsz)
 447#define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 448                                encode_sequence_maxsz + \
 449                                encode_putfh_maxsz + \
 450                                encode_readdir_maxsz)
 451#define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 452                                decode_sequence_maxsz + \
 453                                decode_putfh_maxsz + \
 454                                decode_readdir_maxsz)
 455#define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 456                                encode_sequence_maxsz + \
 457                                encode_putfh_maxsz + \
 458                                encode_write_maxsz + \
 459                                encode_getattr_maxsz)
 460#define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 461                                decode_sequence_maxsz + \
 462                                decode_putfh_maxsz + \
 463                                decode_write_maxsz + \
 464                                decode_getattr_maxsz)
 465#define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 466                                encode_sequence_maxsz + \
 467                                encode_putfh_maxsz + \
 468                                encode_commit_maxsz)
 469#define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 470                                decode_sequence_maxsz + \
 471                                decode_putfh_maxsz + \
 472                                decode_commit_maxsz)
 473#define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 474                                encode_sequence_maxsz + \
 475                                encode_putfh_maxsz + \
 476                                encode_open_maxsz + \
 477                                encode_access_maxsz + \
 478                                encode_getfh_maxsz + \
 479                                encode_getattr_maxsz)
 480#define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 481                                decode_sequence_maxsz + \
 482                                decode_putfh_maxsz + \
 483                                decode_open_maxsz + \
 484                                decode_access_maxsz + \
 485                                decode_getfh_maxsz + \
 486                                decode_getattr_maxsz)
 487#define NFS4_enc_open_confirm_sz \
 488                                (compound_encode_hdr_maxsz + \
 489                                 encode_putfh_maxsz + \
 490                                 encode_open_confirm_maxsz)
 491#define NFS4_dec_open_confirm_sz \
 492                                (compound_decode_hdr_maxsz + \
 493                                 decode_putfh_maxsz + \
 494                                 decode_open_confirm_maxsz)
 495#define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 496                                        encode_sequence_maxsz + \
 497                                        encode_putfh_maxsz + \
 498                                        encode_open_maxsz + \
 499                                        encode_access_maxsz + \
 500                                        encode_getattr_maxsz)
 501#define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 502                                        decode_sequence_maxsz + \
 503                                        decode_putfh_maxsz + \
 504                                        decode_open_maxsz + \
 505                                        decode_access_maxsz + \
 506                                        decode_getattr_maxsz)
 507#define NFS4_enc_open_downgrade_sz \
 508                                (compound_encode_hdr_maxsz + \
 509                                 encode_sequence_maxsz + \
 510                                 encode_putfh_maxsz + \
 511                                 encode_layoutreturn_maxsz + \
 512                                 encode_open_downgrade_maxsz)
 513#define NFS4_dec_open_downgrade_sz \
 514                                (compound_decode_hdr_maxsz + \
 515                                 decode_sequence_maxsz + \
 516                                 decode_putfh_maxsz + \
 517                                 decode_layoutreturn_maxsz + \
 518                                 decode_open_downgrade_maxsz)
 519#define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 520                                 encode_sequence_maxsz + \
 521                                 encode_putfh_maxsz + \
 522                                 encode_layoutreturn_maxsz + \
 523                                 encode_close_maxsz + \
 524                                 encode_getattr_maxsz)
 525#define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 526                                 decode_sequence_maxsz + \
 527                                 decode_putfh_maxsz + \
 528                                 decode_layoutreturn_maxsz + \
 529                                 decode_close_maxsz + \
 530                                 decode_getattr_maxsz)
 531#define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 532                                 encode_sequence_maxsz + \
 533                                 encode_putfh_maxsz + \
 534                                 encode_setattr_maxsz + \
 535                                 encode_getattr_maxsz)
 536#define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 537                                 decode_sequence_maxsz + \
 538                                 decode_putfh_maxsz + \
 539                                 decode_setattr_maxsz + \
 540                                 decode_getattr_maxsz)
 541#define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 542                                encode_sequence_maxsz + \
 543                                encode_putfh_maxsz + \
 544                                encode_fsinfo_maxsz)
 545#define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 546                                decode_sequence_maxsz + \
 547                                decode_putfh_maxsz + \
 548                                decode_fsinfo_maxsz)
 549#define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 550                                encode_renew_maxsz)
 551#define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 552                                decode_renew_maxsz)
 553#define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 554                                encode_setclientid_maxsz)
 555#define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 556                                decode_setclientid_maxsz)
 557#define NFS4_enc_setclientid_confirm_sz \
 558                                (compound_encode_hdr_maxsz + \
 559                                encode_setclientid_confirm_maxsz)
 560#define NFS4_dec_setclientid_confirm_sz \
 561                                (compound_decode_hdr_maxsz + \
 562                                decode_setclientid_confirm_maxsz)
 563#define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 564                                encode_sequence_maxsz + \
 565                                encode_putfh_maxsz + \
 566                                encode_lock_maxsz)
 567#define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 568                                decode_sequence_maxsz + \
 569                                decode_putfh_maxsz + \
 570                                decode_lock_maxsz)
 571#define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 572                                encode_sequence_maxsz + \
 573                                encode_putfh_maxsz + \
 574                                encode_lockt_maxsz)
 575#define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 576                                 decode_sequence_maxsz + \
 577                                 decode_putfh_maxsz + \
 578                                 decode_lockt_maxsz)
 579#define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 580                                encode_sequence_maxsz + \
 581                                encode_putfh_maxsz + \
 582                                encode_locku_maxsz)
 583#define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 584                                decode_sequence_maxsz + \
 585                                decode_putfh_maxsz + \
 586                                decode_locku_maxsz)
 587#define NFS4_enc_release_lockowner_sz \
 588                                (compound_encode_hdr_maxsz + \
 589                                 encode_lockowner_maxsz)
 590#define NFS4_dec_release_lockowner_sz \
 591                                (compound_decode_hdr_maxsz + \
 592                                 decode_lockowner_maxsz)
 593#define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 594                                encode_sequence_maxsz + \
 595                                encode_putfh_maxsz + \
 596                                encode_access_maxsz + \
 597                                encode_getattr_maxsz)
 598#define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 599                                decode_sequence_maxsz + \
 600                                decode_putfh_maxsz + \
 601                                decode_access_maxsz + \
 602                                decode_getattr_maxsz)
 603#define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 604                                encode_sequence_maxsz + \
 605                                encode_putfh_maxsz + \
 606                                encode_getattr_maxsz + \
 607                                encode_renew_maxsz)
 608#define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 609                                decode_sequence_maxsz + \
 610                                decode_putfh_maxsz + \
 611                                decode_getattr_maxsz + \
 612                                decode_renew_maxsz)
 613#define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 614                                encode_sequence_maxsz + \
 615                                encode_putfh_maxsz + \
 616                                encode_lookup_maxsz + \
 617                                encode_getattr_maxsz + \
 618                                encode_getfh_maxsz)
 619#define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 620                                decode_sequence_maxsz + \
 621                                decode_putfh_maxsz + \
 622                                decode_lookup_maxsz + \
 623                                decode_getattr_maxsz + \
 624                                decode_getfh_maxsz)
 625#define NFS4_enc_lookupp_sz     (compound_encode_hdr_maxsz + \
 626                                encode_sequence_maxsz + \
 627                                encode_putfh_maxsz + \
 628                                encode_lookupp_maxsz + \
 629                                encode_getattr_maxsz + \
 630                                encode_getfh_maxsz)
 631#define NFS4_dec_lookupp_sz     (compound_decode_hdr_maxsz + \
 632                                decode_sequence_maxsz + \
 633                                decode_putfh_maxsz + \
 634                                decode_lookupp_maxsz + \
 635                                decode_getattr_maxsz + \
 636                                decode_getfh_maxsz)
 637#define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 638                                encode_sequence_maxsz + \
 639                                encode_putrootfh_maxsz + \
 640                                encode_getattr_maxsz + \
 641                                encode_getfh_maxsz)
 642#define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 643                                decode_sequence_maxsz + \
 644                                decode_putrootfh_maxsz + \
 645                                decode_getattr_maxsz + \
 646                                decode_getfh_maxsz)
 647#define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 648                                encode_sequence_maxsz + \
 649                                encode_putfh_maxsz + \
 650                                encode_remove_maxsz)
 651#define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 652                                decode_sequence_maxsz + \
 653                                decode_putfh_maxsz + \
 654                                decode_remove_maxsz)
 655#define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 656                                encode_sequence_maxsz + \
 657                                encode_putfh_maxsz + \
 658                                encode_savefh_maxsz + \
 659                                encode_putfh_maxsz + \
 660                                encode_rename_maxsz)
 661#define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 662                                decode_sequence_maxsz + \
 663                                decode_putfh_maxsz + \
 664                                decode_savefh_maxsz + \
 665                                decode_putfh_maxsz + \
 666                                decode_rename_maxsz)
 667#define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 668                                encode_sequence_maxsz + \
 669                                encode_putfh_maxsz + \
 670                                encode_savefh_maxsz + \
 671                                encode_putfh_maxsz + \
 672                                encode_link_maxsz + \
 673                                encode_restorefh_maxsz + \
 674                                encode_getattr_maxsz)
 675#define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 676                                decode_sequence_maxsz + \
 677                                decode_putfh_maxsz + \
 678                                decode_savefh_maxsz + \
 679                                decode_putfh_maxsz + \
 680                                decode_link_maxsz + \
 681                                decode_restorefh_maxsz + \
 682                                decode_getattr_maxsz)
 683#define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 684                                encode_sequence_maxsz + \
 685                                encode_putfh_maxsz + \
 686                                encode_symlink_maxsz + \
 687                                encode_getattr_maxsz + \
 688                                encode_getfh_maxsz)
 689#define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 690                                decode_sequence_maxsz + \
 691                                decode_putfh_maxsz + \
 692                                decode_symlink_maxsz + \
 693                                decode_getattr_maxsz + \
 694                                decode_getfh_maxsz)
 695#define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 696                                encode_sequence_maxsz + \
 697                                encode_putfh_maxsz + \
 698                                encode_create_maxsz + \
 699                                encode_getfh_maxsz + \
 700                                encode_getattr_maxsz)
 701#define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 702                                decode_sequence_maxsz + \
 703                                decode_putfh_maxsz + \
 704                                decode_create_maxsz + \
 705                                decode_getfh_maxsz + \
 706                                decode_getattr_maxsz)
 707#define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 708                                encode_sequence_maxsz + \
 709                                encode_putfh_maxsz + \
 710                                encode_getattr_maxsz)
 711#define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 712                                decode_sequence_maxsz + \
 713                                decode_putfh_maxsz + \
 714                                decode_getattr_maxsz)
 715#define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 716                                encode_sequence_maxsz + \
 717                                encode_putfh_maxsz + \
 718                                encode_statfs_maxsz)
 719#define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 720                                decode_sequence_maxsz + \
 721                                decode_putfh_maxsz + \
 722                                decode_statfs_maxsz)
 723#define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 724                                encode_sequence_maxsz + \
 725                                encode_putfh_maxsz + \
 726                                encode_getattr_maxsz)
 727#define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 728                                decode_sequence_maxsz + \
 729                                decode_putfh_maxsz + \
 730                                decode_getattr_maxsz)
 731#define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 732                                encode_sequence_maxsz + \
 733                                encode_putfh_maxsz + \
 734                                encode_layoutreturn_maxsz + \
 735                                encode_delegreturn_maxsz + \
 736                                encode_getattr_maxsz)
 737#define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 738                                decode_sequence_maxsz + \
 739                                decode_putfh_maxsz + \
 740                                decode_layoutreturn_maxsz + \
 741                                decode_delegreturn_maxsz + \
 742                                decode_getattr_maxsz)
 743#define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 744                                encode_sequence_maxsz + \
 745                                encode_putfh_maxsz + \
 746                                encode_getacl_maxsz)
 747#define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 748                                decode_sequence_maxsz + \
 749                                decode_putfh_maxsz + \
 750                                decode_getacl_maxsz)
 751#define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 752                                encode_sequence_maxsz + \
 753                                encode_putfh_maxsz + \
 754                                encode_setacl_maxsz)
 755#define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 756                                decode_sequence_maxsz + \
 757                                decode_putfh_maxsz + \
 758                                decode_setacl_maxsz)
 759#define NFS4_enc_fs_locations_sz \
 760                                (compound_encode_hdr_maxsz + \
 761                                 encode_sequence_maxsz + \
 762                                 encode_putfh_maxsz + \
 763                                 encode_lookup_maxsz + \
 764                                 encode_fs_locations_maxsz + \
 765                                 encode_renew_maxsz)
 766#define NFS4_dec_fs_locations_sz \
 767                                (compound_decode_hdr_maxsz + \
 768                                 decode_sequence_maxsz + \
 769                                 decode_putfh_maxsz + \
 770                                 decode_lookup_maxsz + \
 771                                 decode_fs_locations_maxsz + \
 772                                 decode_renew_maxsz)
 773#define NFS4_enc_secinfo_sz     (compound_encode_hdr_maxsz + \
 774                                encode_sequence_maxsz + \
 775                                encode_putfh_maxsz + \
 776                                encode_secinfo_maxsz)
 777#define NFS4_dec_secinfo_sz     (compound_decode_hdr_maxsz + \
 778                                decode_sequence_maxsz + \
 779                                decode_putfh_maxsz + \
 780                                decode_secinfo_maxsz)
 781#define NFS4_enc_fsid_present_sz \
 782                                (compound_encode_hdr_maxsz + \
 783                                 encode_sequence_maxsz + \
 784                                 encode_putfh_maxsz + \
 785                                 encode_getfh_maxsz + \
 786                                 encode_renew_maxsz)
 787#define NFS4_dec_fsid_present_sz \
 788                                (compound_decode_hdr_maxsz + \
 789                                 decode_sequence_maxsz + \
 790                                 decode_putfh_maxsz + \
 791                                 decode_getfh_maxsz + \
 792                                 decode_renew_maxsz)
 793#if defined(CONFIG_NFS_V4_1)
 794#define NFS4_enc_bind_conn_to_session_sz \
 795                                (compound_encode_hdr_maxsz + \
 796                                 encode_bind_conn_to_session_maxsz)
 797#define NFS4_dec_bind_conn_to_session_sz \
 798                                (compound_decode_hdr_maxsz + \
 799                                 decode_bind_conn_to_session_maxsz)
 800#define NFS4_enc_exchange_id_sz \
 801                                (compound_encode_hdr_maxsz + \
 802                                 encode_exchange_id_maxsz)
 803#define NFS4_dec_exchange_id_sz \
 804                                (compound_decode_hdr_maxsz + \
 805                                 decode_exchange_id_maxsz)
 806#define NFS4_enc_create_session_sz \
 807                                (compound_encode_hdr_maxsz + \
 808                                 encode_create_session_maxsz)
 809#define NFS4_dec_create_session_sz \
 810                                (compound_decode_hdr_maxsz + \
 811                                 decode_create_session_maxsz)
 812#define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
 813                                         encode_destroy_session_maxsz)
 814#define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
 815                                         decode_destroy_session_maxsz)
 816#define NFS4_enc_destroy_clientid_sz    (compound_encode_hdr_maxsz + \
 817                                         encode_destroy_clientid_maxsz)
 818#define NFS4_dec_destroy_clientid_sz    (compound_decode_hdr_maxsz + \
 819                                         decode_destroy_clientid_maxsz)
 820#define NFS4_enc_sequence_sz \
 821                                (compound_decode_hdr_maxsz + \
 822                                 encode_sequence_maxsz)
 823#define NFS4_dec_sequence_sz \
 824                                (compound_decode_hdr_maxsz + \
 825                                 decode_sequence_maxsz)
 826#define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
 827                                         encode_sequence_maxsz + \
 828                                         encode_putrootfh_maxsz + \
 829                                         encode_fsinfo_maxsz)
 830#define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
 831                                         decode_sequence_maxsz + \
 832                                         decode_putrootfh_maxsz + \
 833                                         decode_fsinfo_maxsz)
 834#define NFS4_enc_reclaim_complete_sz    (compound_encode_hdr_maxsz + \
 835                                         encode_sequence_maxsz + \
 836                                         encode_reclaim_complete_maxsz)
 837#define NFS4_dec_reclaim_complete_sz    (compound_decode_hdr_maxsz + \
 838                                         decode_sequence_maxsz + \
 839                                         decode_reclaim_complete_maxsz)
 840#define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
 841                                encode_sequence_maxsz +\
 842                                encode_getdeviceinfo_maxsz)
 843#define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
 844                                decode_sequence_maxsz + \
 845                                decode_getdeviceinfo_maxsz)
 846#define NFS4_enc_layoutget_sz   (compound_encode_hdr_maxsz + \
 847                                encode_sequence_maxsz + \
 848                                encode_putfh_maxsz +        \
 849                                encode_layoutget_maxsz)
 850#define NFS4_dec_layoutget_sz   (compound_decode_hdr_maxsz + \
 851                                decode_sequence_maxsz + \
 852                                decode_putfh_maxsz +        \
 853                                decode_layoutget_maxsz)
 854#define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
 855                                encode_sequence_maxsz +\
 856                                encode_putfh_maxsz + \
 857                                encode_layoutcommit_maxsz + \
 858                                encode_getattr_maxsz)
 859#define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
 860                                decode_sequence_maxsz + \
 861                                decode_putfh_maxsz + \
 862                                decode_layoutcommit_maxsz + \
 863                                decode_getattr_maxsz)
 864#define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
 865                                encode_sequence_maxsz + \
 866                                encode_putfh_maxsz + \
 867                                encode_layoutreturn_maxsz)
 868#define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
 869                                decode_sequence_maxsz + \
 870                                decode_putfh_maxsz + \
 871                                decode_layoutreturn_maxsz)
 872#define NFS4_enc_secinfo_no_name_sz     (compound_encode_hdr_maxsz + \
 873                                        encode_sequence_maxsz + \
 874                                        encode_putrootfh_maxsz +\
 875                                        encode_secinfo_no_name_maxsz)
 876#define NFS4_dec_secinfo_no_name_sz     (compound_decode_hdr_maxsz + \
 877                                        decode_sequence_maxsz + \
 878                                        decode_putrootfh_maxsz + \
 879                                        decode_secinfo_no_name_maxsz)
 880#define NFS4_enc_test_stateid_sz        (compound_encode_hdr_maxsz + \
 881                                         encode_sequence_maxsz + \
 882                                         encode_test_stateid_maxsz)
 883#define NFS4_dec_test_stateid_sz        (compound_decode_hdr_maxsz + \
 884                                         decode_sequence_maxsz + \
 885                                         decode_test_stateid_maxsz)
 886#define NFS4_enc_free_stateid_sz        (compound_encode_hdr_maxsz + \
 887                                         encode_sequence_maxsz + \
 888                                         encode_free_stateid_maxsz)
 889#define NFS4_dec_free_stateid_sz        (compound_decode_hdr_maxsz + \
 890                                         decode_sequence_maxsz + \
 891                                         decode_free_stateid_maxsz)
 892
 893const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 894                                      compound_encode_hdr_maxsz +
 895                                      encode_sequence_maxsz +
 896                                      encode_putfh_maxsz +
 897                                      encode_getattr_maxsz) *
 898                                     XDR_UNIT);
 899
 900const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 901                                     compound_decode_hdr_maxsz +
 902                                     decode_sequence_maxsz +
 903                                     decode_putfh_maxsz) *
 904                                    XDR_UNIT);
 905
 906const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH +
 907                                           compound_decode_hdr_maxsz +
 908                                           decode_sequence_maxsz) *
 909                                          XDR_UNIT);
 910EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead);
 911#endif /* CONFIG_NFS_V4_1 */
 912
 913static const umode_t nfs_type2fmt[] = {
 914        [NF4BAD] = 0,
 915        [NF4REG] = S_IFREG,
 916        [NF4DIR] = S_IFDIR,
 917        [NF4BLK] = S_IFBLK,
 918        [NF4CHR] = S_IFCHR,
 919        [NF4LNK] = S_IFLNK,
 920        [NF4SOCK] = S_IFSOCK,
 921        [NF4FIFO] = S_IFIFO,
 922        [NF4ATTRDIR] = 0,
 923        [NF4NAMEDATTR] = 0,
 924};
 925
 926struct compound_hdr {
 927        int32_t         status;
 928        uint32_t        nops;
 929        __be32 *        nops_p;
 930        uint32_t        taglen;
 931        char *          tag;
 932        uint32_t        replen;         /* expected reply words */
 933        u32             minorversion;
 934};
 935
 936static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
 937{
 938        __be32 *p = xdr_reserve_space(xdr, nbytes);
 939        BUG_ON(!p);
 940        return p;
 941}
 942
 943static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
 944{
 945        WARN_ON_ONCE(xdr_stream_encode_opaque_fixed(xdr, buf, len) < 0);
 946}
 947
 948static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 949{
 950        WARN_ON_ONCE(xdr_stream_encode_opaque(xdr, str, len) < 0);
 951}
 952
 953static void encode_uint32(struct xdr_stream *xdr, u32 n)
 954{
 955        WARN_ON_ONCE(xdr_stream_encode_u32(xdr, n) < 0);
 956}
 957
 958static void encode_uint64(struct xdr_stream *xdr, u64 n)
 959{
 960        WARN_ON_ONCE(xdr_stream_encode_u64(xdr, n) < 0);
 961}
 962
 963static ssize_t xdr_encode_bitmap4(struct xdr_stream *xdr,
 964                const __u32 *bitmap, size_t len)
 965{
 966        ssize_t ret;
 967
 968        /* Trim empty words */
 969        while (len > 0 && bitmap[len-1] == 0)
 970                len--;
 971        ret = xdr_stream_encode_uint32_array(xdr, bitmap, len);
 972        if (WARN_ON_ONCE(ret < 0))
 973                return ret;
 974        return len;
 975}
 976
 977static size_t mask_bitmap4(const __u32 *bitmap, const __u32 *mask,
 978                __u32 *res, size_t len)
 979{
 980        size_t i;
 981        __u32 tmp;
 982
 983        while (len > 0 && (bitmap[len-1] == 0 || mask[len-1] == 0))
 984                len--;
 985        for (i = len; i-- > 0;) {
 986                tmp = bitmap[i] & mask[i];
 987                res[i] = tmp;
 988        }
 989        return len;
 990}
 991
 992static void encode_nfs4_seqid(struct xdr_stream *xdr,
 993                const struct nfs_seqid *seqid)
 994{
 995        if (seqid != NULL)
 996                encode_uint32(xdr, seqid->sequence->counter);
 997        else
 998                encode_uint32(xdr, 0);
 999}
1000

1001static void encode_compound_hdr(struct xdr_stream *xdr,
1002                                struct rpc_rqst *req,
1003                                struct compound_hdr *hdr)
1004{
1005        __be32 *p;
1006        struct rpc_auth *auth = req->rq_cred->cr_auth;
1007
1008        /* initialize running count of expected bytes in reply.
1009         * NOTE: the replied tag SHOULD be the same is the one sent,
1010         * but this is not required as a MUST for the server to do so. */
1011        hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
1012
1013        WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
1014        encode_string(xdr, hdr->taglen, hdr->tag);
1015        p = reserve_space(xdr, 8);
1016        *p++ = cpu_to_be32(hdr->minorversion);
1017        hdr->nops_p = p;
1018        *p = cpu_to_be32(hdr->nops);
1019}
1020
1021static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
1022                uint32_t replen,
1023                struct compound_hdr *hdr)
1024{
1025        encode_uint32(xdr, op);
1026        hdr->nops++;
1027        hdr->replen += replen;
1028}
1029
1030static void encode_nops(struct compound_hdr *hdr)
1031{
1032        WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
1033        *hdr->nops_p = htonl(hdr->nops);
1034}
1035
1036static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1037{
1038        encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
1039}
1040
1041static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
1042{
1043        encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
1044}
1045
1046static __be32 *
1047xdr_encode_nfstime4(__be32 *p, const struct timespec *t)
1048{
1049        p = xdr_encode_hyper(p, (__s64)t->tv_sec);
1050        *p++ = cpu_to_be32(t->tv_nsec);
1051        return p;
1052}
1053
1054static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
1055                                const struct nfs4_label *label,
1056                                const umode_t *umask,
1057                                const struct nfs_server *server,
1058                                const uint32_t attrmask[])
1059{
1060        char owner_name[IDMAP_NAMESZ];
1061        char owner_group[IDMAP_NAMESZ];
1062        int owner_namelen = 0;
1063        int owner_grouplen = 0;
1064        __be32 *p;
1065        uint32_t len = 0;
1066        uint32_t bmval[3] = { 0 };
1067
1068        /*
1069         * We reserve enough space to write the entire attribute buffer at once.
1070         */
1071        if ((iap->ia_valid & ATTR_SIZE) && (attrmask[0] & FATTR4_WORD0_SIZE)) {
1072                bmval[0] |= FATTR4_WORD0_SIZE;
1073                len += 8;
1074        }
1075        if (iap->ia_valid & ATTR_MODE) {
1076                if (umask && (attrmask[2] & FATTR4_WORD2_MODE_UMASK)) {
1077                        bmval[2] |= FATTR4_WORD2_MODE_UMASK;
1078                        len += 8;
1079                } else if (attrmask[1] & FATTR4_WORD1_MODE) {
1080                        bmval[1] |= FATTR4_WORD1_MODE;
1081                        len += 4;
1082                }
1083        }
1084        if ((iap->ia_valid & ATTR_UID) && (attrmask[1] & FATTR4_WORD1_OWNER)) {
1085                owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1086                if (owner_namelen < 0) {
1087                        dprintk("nfs: couldn't resolve uid %d to string\n",
1088                                        from_kuid(&init_user_ns, iap->ia_uid));
1089                        /* XXX */
1090                        strcpy(owner_name, "nobody");
1091                        owner_namelen = sizeof("nobody") - 1;
1092                        /* goto out; */
1093                }
1094                bmval[1] |= FATTR4_WORD1_OWNER;
1095                len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1096        }
1097        if ((iap->ia_valid & ATTR_GID) &&
1098           (attrmask[1] & FATTR4_WORD1_OWNER_GROUP)) {
1099                owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1100                if (owner_grouplen < 0) {
1101                        dprintk("nfs: couldn't resolve gid %d to string\n",
1102                                        from_kgid(&init_user_ns, iap->ia_gid));
1103                        strcpy(owner_group, "nobody");
1104                        owner_grouplen = sizeof("nobody") - 1;
1105                        /* goto out; */
1106                }
1107                bmval[1] |= FATTR4_WORD1_OWNER_GROUP;
1108                len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1109        }
1110        if (attrmask[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1111                if (iap->ia_valid & ATTR_ATIME_SET) {
1112                        bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1113                        len += 4 + (nfstime4_maxsz << 2);
1114                } else if (iap->ia_valid & ATTR_ATIME) {
1115                        bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1116                        len += 4;
1117                }
1118        }
1119        if (attrmask[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1120                if (iap->ia_valid & ATTR_MTIME_SET) {
1121                        bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1122                        len += 4 + (nfstime4_maxsz << 2);
1123                } else if (iap->ia_valid & ATTR_MTIME) {
1124                        bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1125                        len += 4;
1126                }
1127        }
1128
1129        if (label && (attrmask[2] & FATTR4_WORD2_SECURITY_LABEL)) {
1130                len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1131                bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
1132        }
1133
1134        xdr_encode_bitmap4(xdr, bmval, ARRAY_SIZE(bmval));
1135        xdr_stream_encode_opaque_inline(xdr, (void **)&p, len);
1136
1137        if (bmval[0] & FATTR4_WORD0_SIZE)
1138                p = xdr_encode_hyper(p, iap->ia_size);
1139        if (bmval[1] & FATTR4_WORD1_MODE)
1140                *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1141        if (bmval[1] & FATTR4_WORD1_OWNER)
1142                p = xdr_encode_opaque(p, owner_name, owner_namelen);
1143        if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
1144                p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1145        if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1146                if (iap->ia_valid & ATTR_ATIME_SET) {
1147                        *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1148                        p = xdr_encode_nfstime4(p, &iap->ia_atime);
1149                } else
1150                        *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1151        }
1152        if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1153                if (iap->ia_valid & ATTR_MTIME_SET) {
1154                        *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1155                        p = xdr_encode_nfstime4(p, &iap->ia_mtime);
1156                } else
1157                        *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1158        }
1159        if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
1160                *p++ = cpu_to_be32(label->lfs);
1161                *p++ = cpu_to_be32(label->pi);
1162                *p++ = cpu_to_be32(label->len);
1163                p = xdr_encode_opaque_fixed(p, label->label, label->len);
1164        }
1165        if (bmval[2] & FATTR4_WORD2_MODE_UMASK) {
1166                *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1167                *p++ = cpu_to_be32(*umask);
1168        }
1169
1170/* out: */
1171}
1172
1173static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1174{
1175        encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1176        encode_uint32(xdr, access);
1177}
1178
1179static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1180{
1181        encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1182        encode_nfs4_seqid(xdr, arg->seqid);
1183        encode_nfs4_stateid(xdr, &arg->stateid);
1184}
1185
1186static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1187{
1188        __be32 *p;
1189
1190        encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1191        p = reserve_space(xdr, 12);
1192        p = xdr_encode_hyper(p, args->offset);
1193        *p = cpu_to_be32(args->count);
1194}
1195
1196static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1197{
1198        __be32 *p;
1199
1200        encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1201        encode_uint32(xdr, create->ftype);
1202
1203        switch (create->ftype) {
1204        case NF4LNK:
1205                p = reserve_space(xdr, 4);
1206                *p = cpu_to_be32(create->u.symlink.len);
1207                xdr_write_pages(xdr, create->u.symlink.pages, 0,
1208                                create->u.symlink.len);
1209                xdr->buf->flags |= XDRBUF_WRITE;
1210                break;
1211
1212        case NF4BLK: case NF4CHR:
1213                p = reserve_space(xdr, 8);
1214                *p++ = cpu_to_be32(create->u.device.specdata1);
1215                *p = cpu_to_be32(create->u.device.specdata2);
1216                break;
1217
1218        default:
1219                break;
1220        }
1221
1222        encode_string(xdr, create->name->len, create->name->name);
1223        encode_attrs(xdr, create->attrs, create->label, &create->umask,
1224                        create->server, create->server->attr_bitmask);
1225}
1226
1227static void encode_getattr(struct xdr_stream *xdr,
1228                const __u32 *bitmap, const __u32 *mask, size_t len,
1229                struct compound_hdr *hdr)
1230{
1231        __u32 masked_bitmap[nfs4_fattr_bitmap_maxsz];
1232
1233        encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1234        if (mask) {
1235                if (WARN_ON_ONCE(len > ARRAY_SIZE(masked_bitmap)))
1236                        len = ARRAY_SIZE(masked_bitmap);
1237                len = mask_bitmap4(bitmap, mask, masked_bitmap, len);
1238                bitmap = masked_bitmap;
1239        }
1240        xdr_encode_bitmap4(xdr, bitmap, len);
1241}
1242
1243static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1244{
1245        encode_getattr(xdr, nfs4_fattr_bitmap, bitmask,
1246                        ARRAY_SIZE(nfs4_fattr_bitmap), hdr);
1247}
1248
1249static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1250                                 const u32 *open_bitmap,
1251                                 struct compound_hdr *hdr)
1252{
1253        encode_getattr(xdr, open_bitmap, bitmask, 3, hdr);
1254}
1255
1256static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1257{
1258        encode_getattr(xdr, nfs4_fsinfo_bitmap, bitmask,
1259                        ARRAY_SIZE(nfs4_fsinfo_bitmap), hdr);
1260}
1261
1262static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1263{
1264        encode_getattr(xdr, nfs4_fs_locations_bitmap, bitmask,
1265                        ARRAY_SIZE(nfs4_fs_locations_bitmap), hdr);
1266}
1267
1268static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1269{
1270        encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1271}
1272
1273static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1274{
1275        encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1276        encode_string(xdr, name->len, name->name);
1277}
1278
1279static inline int nfs4_lock_type(struct file_lock *fl, int block)
1280{
1281        if (fl->fl_type == F_RDLCK)
1282                return block ? NFS4_READW_LT : NFS4_READ_LT;
1283        return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1284}
1285
1286static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1287{
1288        if (fl->fl_end == OFFSET_MAX)
1289                return ~(uint64_t)0;
1290        return fl->fl_end - fl->fl_start + 1;
1291}
1292
1293static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1294{
1295        __be32 *p;
1296
1297        p = reserve_space(xdr, 32);
1298        p = xdr_encode_hyper(p, lowner->clientid);
1299        *p++ = cpu_to_be32(20);
1300        p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1301        *p++ = cpu_to_be32(lowner->s_dev);
1302        xdr_encode_hyper(p, lowner->id);
1303}
1304
1305/*
1306 * opcode,type,reclaim,offset,length,new_lock_owner = 32
1307 * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1308 */
1309static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1310{
1311        __be32 *p;
1312
1313        encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1314        p = reserve_space(xdr, 28);
1315        *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1316        *p++ = cpu_to_be32(args->reclaim);
1317        p = xdr_encode_hyper(p, args->fl->fl_start);
1318        p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1319        *p = cpu_to_be32(args->new_lock_owner);
1320        if (args->new_lock_owner){
1321                encode_nfs4_seqid(xdr, args->open_seqid);
1322                encode_nfs4_stateid(xdr, &args->open_stateid);
1323                encode_nfs4_seqid(xdr, args->lock_seqid);
1324                encode_lockowner(xdr, &args->lock_owner);
1325        }
1326        else {
1327                encode_nfs4_stateid(xdr, &args->lock_stateid);
1328                encode_nfs4_seqid(xdr, args->lock_seqid);
1329        }
1330}
1331
1332static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1333{
1334        __be32 *p;
1335
1336        encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1337        p = reserve_space(xdr, 20);
1338        *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1339        p = xdr_encode_hyper(p, args->fl->fl_start);
1340        p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1341        encode_lockowner(xdr, &args->lock_owner);
1342}
1343
1344static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1345{
1346        __be32 *p;
1347
1348        encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1349        encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1350        encode_nfs4_seqid(xdr, args->seqid);
1351        encode_nfs4_stateid(xdr, &args->stateid);
1352        p = reserve_space(xdr, 16);
1353        p = xdr_encode_hyper(p, args->fl->fl_start);
1354        xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1355}
1356
1357static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1358{
1359        encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1360        encode_lockowner(xdr, lowner);
1361}
1362
1363static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1364{
1365        encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1366        encode_string(xdr, name->len, name->name);
1367}
1368
1369static void encode_lookupp(struct xdr_stream *xdr, struct compound_hdr *hdr)
1370{
1371        encode_op_hdr(xdr, OP_LOOKUPP, decode_lookupp_maxsz, hdr);
1372}
1373
1374static void encode_share_access(struct xdr_stream *xdr, u32 share_access)
1375{
1376        __be32 *p;
1377
1378        p = reserve_space(xdr, 8);
1379        *p++ = cpu_to_be32(share_access);
1380        *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1381}
1382
1383static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1384{
1385        __be32 *p;
1386 /*
1387 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1388 * owner 4 = 32
1389 */
1390        encode_nfs4_seqid(xdr, arg->seqid);
1391        encode_share_access(xdr, arg->share_access);
1392        p = reserve_space(xdr, 36);
1393        p = xdr_encode_hyper(p, arg->clientid);
1394        *p++ = cpu_to_be32(24);
1395        p = xdr_encode_opaque_fixed(p, "open id:", 8);
1396        *p++ = cpu_to_be32(arg->server->s_dev);
1397        *p++ = cpu_to_be32(arg->id.uniquifier);
1398        xdr_encode_hyper(p, arg->id.create_time);
1399}
1400
1401static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1402{
1403        __be32 *p;
1404
1405        p = reserve_space(xdr, 4);
1406        switch(arg->createmode) {
1407        case NFS4_CREATE_UNCHECKED:
1408                *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1409                encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1410                                arg->server, arg->server->attr_bitmask);
1411                break;
1412        case NFS4_CREATE_GUARDED:
1413                *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1414                encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1415                                arg->server, arg->server->attr_bitmask);
1416                break;
1417        case NFS4_CREATE_EXCLUSIVE:
1418                *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1419                encode_nfs4_verifier(xdr, &arg->u.verifier);
1420                break;
1421        case NFS4_CREATE_EXCLUSIVE4_1:
1422                *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1423                encode_nfs4_verifier(xdr, &arg->u.verifier);
1424                encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1425                                arg->server, arg->server->exclcreat_bitmask);
1426        }
1427}
1428
1429static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1430{
1431        __be32 *p;
1432
1433        p = reserve_space(xdr, 4);
1434        switch (arg->open_flags & O_CREAT) {
1435        case 0:
1436                *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1437                break;
1438        default:
1439                *p = cpu_to_be32(NFS4_OPEN_CREATE);
1440                encode_createmode(xdr, arg);
1441        }
1442}
1443
1444static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1445{
1446        __be32 *p;
1447
1448        p = reserve_space(xdr, 4);
1449        switch (delegation_type) {
1450        case 0:
1451                *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1452                break;
1453        case FMODE_READ:
1454                *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1455                break;
1456        case FMODE_WRITE|FMODE_READ:
1457                *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1458                break;
1459        default:
1460                BUG();
1461        }
1462}
1463
1464static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1465{
1466        __be32 *p;
1467
1468        p = reserve_space(xdr, 4);
1469        *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1470        encode_string(xdr, name->len, name->name);
1471}
1472
1473static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1474{
1475        __be32 *p;
1476
1477        p = reserve_space(xdr, 4);
1478        *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1479        encode_delegation_type(xdr, type);
1480}
1481
1482static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1483{
1484        __be32 *p;
1485
1486        p = reserve_space(xdr, 4);
1487        *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1488        encode_nfs4_stateid(xdr, stateid);
1489        encode_string(xdr, name->len, name->name);
1490}
1491
1492static inline void encode_claim_fh(struct xdr_stream *xdr)
1493{
1494        __be32 *p;
1495
1496        p = reserve_space(xdr, 4);
1497        *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1498}
1499
1500static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1501{
1502        __be32 *p;
1503
1504        p = reserve_space(xdr, 4);
1505        *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1506        encode_nfs4_stateid(xdr, stateid);
1507}
1508
1509static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1510{
1511        encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1512        encode_openhdr(xdr, arg);
1513        encode_opentype(xdr, arg);
1514        switch (arg->claim) {
1515        case NFS4_OPEN_CLAIM_NULL:
1516                encode_claim_null(xdr, arg->name);
1517                break;
1518        case NFS4_OPEN_CLAIM_PREVIOUS:
1519                encode_claim_previous(xdr, arg->u.delegation_type);
1520                break;
1521        case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1522                encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1523                break;
1524        case NFS4_OPEN_CLAIM_FH:
1525                encode_claim_fh(xdr);
1526                break;
1527        case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1528                encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1529                break;
1530        default:
1531                BUG();
1532        }
1533}
1534
1535static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1536{
1537        encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1538        encode_nfs4_stateid(xdr, arg->stateid);
1539        encode_nfs4_seqid(xdr, arg->seqid);
1540}
1541
1542static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1543{
1544        encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1545        encode_nfs4_stateid(xdr, &arg->stateid);
1546        encode_nfs4_seqid(xdr, arg->seqid);
1547        encode_share_access(xdr, arg->share_access);
1548}
1549
1550static void
1551encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1552{
1553        encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1554        encode_string(xdr, fh->size, fh->data);
1555}
1556
1557static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1558{
1559        encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1560}
1561
1562static void encode_read(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1563                        struct compound_hdr *hdr)
1564{
1565        __be32 *p;
1566
1567        encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1568        encode_nfs4_stateid(xdr, &args->stateid);
1569
1570        p = reserve_space(xdr, 12);
1571        p = xdr_encode_hyper(p, args->offset);
1572        *p = cpu_to_be32(args->count);
1573}
1574
1575static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1576{
1577        uint32_t attrs[3] = {
1578                FATTR4_WORD0_RDATTR_ERROR,
1579                FATTR4_WORD1_MOUNTED_ON_FILEID,
1580        };
1581        uint32_t dircount = readdir->count >> 1;
1582        __be32 *p, verf[2];
1583        uint32_t attrlen = 0;
1584        unsigned int i;
1585
1586        if (readdir->plus) {
1587                attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1588                        FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1589                attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1590                        FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1591                        FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1592                        FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1593                attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1594                dircount >>= 1;
1595        }
1596        /* Use mounted_on_fileid only if the server supports it */
1597        if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1598                attrs[0] |= FATTR4_WORD0_FILEID;
1599        for (i = 0; i < ARRAY_SIZE(attrs); i++) {
1600                attrs[i] &= readdir->bitmask[i];
1601                if (attrs[i] != 0)
1602                        attrlen = i+1;
1603        }
1604
1605        encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1606        encode_uint64(xdr, readdir->cookie);
1607        encode_nfs4_verifier(xdr, &readdir->verifier);
1608        p = reserve_space(xdr, 12 + (attrlen << 2));
1609        *p++ = cpu_to_be32(dircount);
1610        *p++ = cpu_to_be32(readdir->count);
1611        *p++ = cpu_to_be32(attrlen);
1612        for (i = 0; i < attrlen; i++)
1613                *p++ = cpu_to_be32(attrs[i]);
1614        memcpy(verf, readdir->verifier.data, sizeof(verf));
1615
1616        dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1617                        __func__,
1618                        (unsigned long long)readdir->cookie,
1619                        verf[0], verf[1],
1620                        attrs[0] & readdir->bitmask[0],
1621                        attrs[1] & readdir->bitmask[1],
1622                        attrs[2] & readdir->bitmask[2]);
1623}
1624
1625static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1626{
1627        encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1628}
1629
1630static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1631{
1632        encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1633        encode_string(xdr, name->len, name->name);
1634}
1635
1636static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1637{
1638        encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1639        encode_string(xdr, oldname->len, oldname->name);
1640        encode_string(xdr, newname->len, newname->name);
1641}
1642
1643static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1644                         struct compound_hdr *hdr)
1645{
1646        encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1647        encode_uint64(xdr, clid);
1648}
1649
1650static void
1651encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1652{
1653        encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1654}
1655
1656static void
1657encode_setacl(struct xdr_stream *xdr, const struct nfs_setaclargs *arg,
1658                struct compound_hdr *hdr)
1659{
1660        __be32 *p;
1661
1662        encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1663        encode_nfs4_stateid(xdr, &zero_stateid);
1664        p = reserve_space(xdr, 2*4);
1665        *p++ = cpu_to_be32(1);
1666        *p = cpu_to_be32(FATTR4_WORD0_ACL);
1667        p = reserve_space(xdr, 4);
1668        *p = cpu_to_be32(arg->acl_len);
1669        xdr_write_pages(xdr, arg->acl_pages, 0, arg->acl_len);
1670}
1671
1672static void
1673encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1674{
1675        encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1676}
1677
1678static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1679{
1680        encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1681        encode_nfs4_stateid(xdr, &arg->stateid);
1682        encode_attrs(xdr, arg->iap, arg->label, NULL, server,
1683                        server->attr_bitmask);
1684}
1685
1686static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1687{
1688        __be32 *p;
1689
1690        encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1691        encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1692
1693        encode_string(xdr, strlen(setclientid->sc_clnt->cl_owner_id),
1694                        setclientid->sc_clnt->cl_owner_id);
1695        p = reserve_space(xdr, 4);
1696        *p = cpu_to_be32(setclientid->sc_prog);
1697        encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1698        encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1699        p = reserve_space(xdr, 4);
1700        *p = cpu_to_be32(setclientid->sc_clnt->cl_cb_ident);
1701}
1702
1703static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1704{
1705        encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1706                        decode_setclientid_confirm_maxsz, hdr);
1707        encode_uint64(xdr, arg->clientid);
1708        encode_nfs4_verifier(xdr, &arg->confirm);
1709}
1710
1711static void encode_write(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1712                         struct compound_hdr *hdr)
1713{
1714        __be32 *p;
1715
1716        encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1717        encode_nfs4_stateid(xdr, &args->stateid);
1718
1719        p = reserve_space(xdr, 16);
1720        p = xdr_encode_hyper(p, args->offset);
1721        *p++ = cpu_to_be32(args->stable);
1722        *p = cpu_to_be32(args->count);
1723
1724        xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1725}
1726
1727static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1728{
1729        encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1730        encode_nfs4_stateid(xdr, stateid);
1731}
1732
1733static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1734{
1735        encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1736        encode_string(xdr, name->len, name->name);
1737}
1738
1739#if defined(CONFIG_NFS_V4_1)
1740/* NFSv4.1 operations */
1741static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1742                                   const struct nfs41_bind_conn_to_session_args *args,
1743                                   struct compound_hdr *hdr)
1744{
1745        __be32 *p;
1746
1747        encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1748                decode_bind_conn_to_session_maxsz, hdr);
1749        encode_opaque_fixed(xdr, args->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1750        p = xdr_reserve_space(xdr, 8);
1751        *p++ = cpu_to_be32(args->dir);
1752        *p = (args->use_conn_in_rdma_mode) ? cpu_to_be32(1) : cpu_to_be32(0);
1753}
1754
1755static void encode_op_map(struct xdr_stream *xdr, const struct nfs4_op_map *op_map)
1756{
1757        unsigned int i;
1758        encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
1759        for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
1760                encode_uint32(xdr, op_map->u.words[i]);
1761}
1762
1763static void encode_exchange_id(struct xdr_stream *xdr,
1764                               const struct nfs41_exchange_id_args *args,
1765                               struct compound_hdr *hdr)
1766{
1767        __be32 *p;
1768        char impl_name[IMPL_NAME_LIMIT];
1769        int len = 0;
1770
1771        encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1772        encode_nfs4_verifier(xdr, &args->verifier);
1773
1774        encode_string(xdr, strlen(args->client->cl_owner_id),
1775                        args->client->cl_owner_id);
1776
1777        encode_uint32(xdr, args->flags);
1778        encode_uint32(xdr, args->state_protect.how);
1779
1780        switch (args->state_protect.how) {
1781        case SP4_NONE:
1782                break;
1783        case SP4_MACH_CRED:
1784                encode_op_map(xdr, &args->state_protect.enforce);
1785                encode_op_map(xdr, &args->state_protect.allow);
1786                break;
1787        default:
1788                WARN_ON_ONCE(1);
1789                break;
1790        }
1791
1792        if (send_implementation_id &&
1793            sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1794            sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1795                <= sizeof(impl_name) + 1)
1796                len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1797                               utsname()->sysname, utsname()->release,
1798                               utsname()->version, utsname()->machine);
1799
1800        if (len > 0) {
1801                encode_uint32(xdr, 1);  /* implementation id array length=1 */
1802
1803                encode_string(xdr,
1804                        sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1805                        CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1806                encode_string(xdr, len, impl_name);
1807                /* just send zeros for nii_date - the date is in nii_name */
1808                p = reserve_space(xdr, 12);
1809                p = xdr_encode_hyper(p, 0);
1810                *p = cpu_to_be32(0);
1811        } else
1812                encode_uint32(xdr, 0);  /* implementation id array length=0 */
1813}
1814
1815static void encode_create_session(struct xdr_stream *xdr,
1816                                  const struct nfs41_create_session_args *args,
1817                                  struct compound_hdr *hdr)
1818{
1819        __be32 *p;
1820        struct nfs_client *clp = args->client;
1821        struct rpc_clnt *clnt = clp->cl_rpcclient;
1822        struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1823        u32 max_resp_sz_cached;
1824
1825        /*
1826         * Assumes OPEN is the biggest non-idempotent compound.
1827         * 2 is the verifier.
1828         */
1829        max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE + 2)
1830                                * XDR_UNIT + RPC_MAX_AUTH_SIZE;
1831
1832        encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1833        p = reserve_space(xdr, 16 + 2*28 + 20 + clnt->cl_nodelen + 12);
1834        p = xdr_encode_hyper(p, args->clientid);
1835        *p++ = cpu_to_be32(args->seqid);                        /*Sequence id */
1836        *p++ = cpu_to_be32(args->flags);                        /*flags */
1837
1838        /* Fore Channel */
1839        *p++ = cpu_to_be32(0);                          /* header padding size */
1840        *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1841        *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1842        *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1843        *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1844        *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1845        *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1846
1847        /* Back Channel */
1848        *p++ = cpu_to_be32(0);                          /* header padding size */
1849        *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1850        *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1851        *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1852        *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1853        *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1854        *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1855
1856        *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1857        *p++ = cpu_to_be32(1);
1858        *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1859
1860        /* authsys_parms rfc1831 */
1861        *p++ = cpu_to_be32(ktime_to_ns(nn->boot_time)); /* stamp */
1862        p = xdr_encode_array(p, clnt->cl_nodename, clnt->cl_nodelen);
1863        *p++ = cpu_to_be32(0);                          /* UID */
1864        *p++ = cpu_to_be32(0);                          /* GID */
1865        *p = cpu_to_be32(0);                            /* No more gids */
1866}
1867
1868static void encode_destroy_session(struct xdr_stream *xdr,
1869                                   const struct nfs4_session *session,
1870                                   struct compound_hdr *hdr)
1871{
1872        encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1873        encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1874}
1875
1876static void encode_destroy_clientid(struct xdr_stream *xdr,
1877                                   uint64_t clientid,
1878                                   struct compound_hdr *hdr)
1879{
1880        encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1881        encode_uint64(xdr, clientid);
1882}
1883
1884static void encode_reclaim_complete(struct xdr_stream *xdr,
1885                                    const struct nfs41_reclaim_complete_args *args,
1886                                    struct compound_hdr *hdr)
1887{
1888        encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1889        encode_uint32(xdr, args->one_fs);
1890}
1891#endif /* CONFIG_NFS_V4_1 */
1892
1893static void encode_sequence(struct xdr_stream *xdr,
1894                            const struct nfs4_sequence_args *args,
1895                            struct compound_hdr *hdr)
1896{
1897#if defined(CONFIG_NFS_V4_1)
1898        struct nfs4_session *session;
1899        struct nfs4_slot_table *tp;
1900        struct nfs4_slot *slot = args->sa_slot;
1901        __be32 *p;
1902
1903        tp = slot->table;
1904        session = tp->session;
1905        if (!session)
1906                return;
1907
1908        encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1909
1910        /*
1911         * Sessionid + seqid + slotid + max slotid + cache_this
1912         */
1913        dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1914                "max_slotid=%d cache_this=%d\n",
1915                __func__,
1916                ((u32 *)session->sess_id.data)[0],
1917                ((u32 *)session->sess_id.data)[1],
1918                ((u32 *)session->sess_id.data)[2],
1919                ((u32 *)session->sess_id.data)[3],
1920                slot->seq_nr, slot->slot_nr,
1921                tp->highest_used_slotid, args->sa_cache_this);
1922        p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1923        p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1924        *p++ = cpu_to_be32(slot->seq_nr);
1925        *p++ = cpu_to_be32(slot->slot_nr);
1926        *p++ = cpu_to_be32(tp->highest_used_slotid);
1927        *p = cpu_to_be32(args->sa_cache_this);
1928#endif /* CONFIG_NFS_V4_1 */
1929}
1930
1931#ifdef CONFIG_NFS_V4_1
1932static void
1933encode_getdeviceinfo(struct xdr_stream *xdr,
1934                     const struct nfs4_getdeviceinfo_args *args,
1935                     struct compound_hdr *hdr)
1936{
1937        __be32 *p;
1938
1939        encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1940        p = reserve_space(xdr, NFS4_DEVICEID4_SIZE + 4 + 4);
1941        p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1942                                    NFS4_DEVICEID4_SIZE);
1943        *p++ = cpu_to_be32(args->pdev->layout_type);
1944        *p++ = cpu_to_be32(args->pdev->maxcount);       /* gdia_maxcount */
1945
1946        p = reserve_space(xdr, 4 + 4);
1947        *p++ = cpu_to_be32(1);                  /* bitmap length */
1948        *p++ = cpu_to_be32(args->notify_types);
1949}
1950
1951static void
1952encode_layoutget(struct xdr_stream *xdr,
1953                      const struct nfs4_layoutget_args *args,
1954                      struct compound_hdr *hdr)
1955{
1956        __be32 *p;
1957
1958        encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1959        p = reserve_space(xdr, 36);
1960        *p++ = cpu_to_be32(0);     /* Signal layout available */
1961        *p++ = cpu_to_be32(args->type);
1962        *p++ = cpu_to_be32(args->range.iomode);
1963        p = xdr_encode_hyper(p, args->range.offset);
1964        p = xdr_encode_hyper(p, args->range.length);
1965        p = xdr_encode_hyper(p, args->minlength);
1966        encode_nfs4_stateid(xdr, &args->stateid);
1967        encode_uint32(xdr, args->maxcount);
1968
1969        dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1970                __func__,
1971                args->type,
1972                args->range.iomode,
1973                (unsigned long)args->range.offset,
1974                (unsigned long)args->range.length,
1975                args->maxcount);
1976}
1977
1978static int
1979encode_layoutcommit(struct xdr_stream *xdr,
1980                    struct inode *inode,
1981                    const struct nfs4_layoutcommit_args *args,
1982                    struct compound_hdr *hdr)
1983{
1984        __be32 *p;
1985
1986        dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1987                NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1988
1989        encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
1990        p = reserve_space(xdr, 20);
1991        /* Only whole file layouts */
1992        p = xdr_encode_hyper(p, 0); /* offset */
1993        p = xdr_encode_hyper(p, args->lastbytewritten + 1);     /* length */
1994        *p = cpu_to_be32(0); /* reclaim */
1995        encode_nfs4_stateid(xdr, &args->stateid);
1996        if (args->lastbytewritten != U64_MAX) {
1997                p = reserve_space(xdr, 20);
1998                *p++ = cpu_to_be32(1); /* newoffset = TRUE */
1999                p = xdr_encode_hyper(p, args->lastbytewritten);
2000        } else {

2001                p = reserve_space(xdr, 12);
2002                *p++ = cpu_to_be32(0); /* newoffset = FALSE */
2003        }
2004        *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
2005        *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
2006
2007        encode_uint32(xdr, args->layoutupdate_len);
2008        if (args->layoutupdate_pages)
2009                xdr_write_pages(xdr, args->layoutupdate_pages, 0,
2010                                args->layoutupdate_len);
2011
2012        return 0;
2013}
2014
2015static void
2016encode_layoutreturn(struct xdr_stream *xdr,
2017                    const struct nfs4_layoutreturn_args *args,
2018                    struct compound_hdr *hdr)
2019{
2020        __be32 *p;
2021
2022        encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2023        p = reserve_space(xdr, 16);
2024        *p++ = cpu_to_be32(0);          /* reclaim. always 0 for now */
2025        *p++ = cpu_to_be32(args->layout_type);
2026        *p++ = cpu_to_be32(args->range.iomode);
2027        *p = cpu_to_be32(RETURN_FILE);
2028        p = reserve_space(xdr, 16);
2029        p = xdr_encode_hyper(p, args->range.offset);
2030        p = xdr_encode_hyper(p, args->range.length);
2031        spin_lock(&args->inode->i_lock);
2032        encode_nfs4_stateid(xdr, &args->stateid);
2033        spin_unlock(&args->inode->i_lock);
2034        if (args->ld_private->ops && args->ld_private->ops->encode)
2035                args->ld_private->ops->encode(xdr, args, args->ld_private);
2036        else
2037                encode_uint32(xdr, 0);
2038}
2039
2040static int
2041encode_secinfo_no_name(struct xdr_stream *xdr,
2042                       const struct nfs41_secinfo_no_name_args *args,
2043                       struct compound_hdr *hdr)
2044{
2045        encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2046        encode_uint32(xdr, args->style);
2047        return 0;
2048}
2049
2050static void encode_test_stateid(struct xdr_stream *xdr,
2051                                const struct nfs41_test_stateid_args *args,
2052                                struct compound_hdr *hdr)
2053{
2054        encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2055        encode_uint32(xdr, 1);
2056        encode_nfs4_stateid(xdr, args->stateid);
2057}
2058
2059static void encode_free_stateid(struct xdr_stream *xdr,
2060                                const struct nfs41_free_stateid_args *args,
2061                                struct compound_hdr *hdr)
2062{
2063        encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2064        encode_nfs4_stateid(xdr, &args->stateid);
2065}
2066#else
2067static inline void
2068encode_layoutreturn(struct xdr_stream *xdr,
2069                    const struct nfs4_layoutreturn_args *args,
2070                    struct compound_hdr *hdr)
2071{
2072}
2073#endif /* CONFIG_NFS_V4_1 */
2074
2075/*
2076 * END OF "GENERIC" ENCODE ROUTINES.
2077 */
2078
2079static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2080{
2081#if defined(CONFIG_NFS_V4_1)
2082        struct nfs4_session *session = args->sa_slot->table->session;
2083        if (session)
2084                return session->clp->cl_mvops->minor_version;
2085#endif /* CONFIG_NFS_V4_1 */
2086        return 0;
2087}
2088
2089/*
2090 * Encode an ACCESS request
2091 */
2092static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2093                                const void *data)
2094{
2095        const struct nfs4_accessargs *args = data;
2096        struct compound_hdr hdr = {
2097                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2098        };
2099
2100        encode_compound_hdr(xdr, req, &hdr);
2101        encode_sequence(xdr, &args->seq_args, &hdr);
2102        encode_putfh(xdr, args->fh, &hdr);
2103        encode_access(xdr, args->access, &hdr);
2104        if (args->bitmask)
2105                encode_getfattr(xdr, args->bitmask, &hdr);
2106        encode_nops(&hdr);
2107}
2108
2109/*
2110 * Encode LOOKUP request
2111 */
2112static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2113                                const void *data)
2114{
2115        const struct nfs4_lookup_arg *args = data;
2116        struct compound_hdr hdr = {
2117                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2118        };
2119
2120        encode_compound_hdr(xdr, req, &hdr);
2121        encode_sequence(xdr, &args->seq_args, &hdr);
2122        encode_putfh(xdr, args->dir_fh, &hdr);
2123        encode_lookup(xdr, args->name, &hdr);
2124        encode_getfh(xdr, &hdr);
2125        encode_getfattr(xdr, args->bitmask, &hdr);
2126        encode_nops(&hdr);
2127}
2128
2129/*
2130 * Encode LOOKUPP request
2131 */
2132static void nfs4_xdr_enc_lookupp(struct rpc_rqst *req, struct xdr_stream *xdr,
2133                const void *data)
2134{
2135        const struct nfs4_lookupp_arg *args = data;
2136        struct compound_hdr hdr = {
2137                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2138        };
2139
2140        encode_compound_hdr(xdr, req, &hdr);
2141        encode_sequence(xdr, &args->seq_args, &hdr);
2142        encode_putfh(xdr, args->fh, &hdr);
2143        encode_lookupp(xdr, &hdr);
2144        encode_getfh(xdr, &hdr);
2145        encode_getfattr(xdr, args->bitmask, &hdr);
2146        encode_nops(&hdr);
2147}
2148
2149/*
2150 * Encode LOOKUP_ROOT request
2151 */
2152static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2153                                     struct xdr_stream *xdr,
2154                                     const void *data)
2155{
2156        const struct nfs4_lookup_root_arg *args = data;
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_putrootfh(xdr, &hdr);
2164        encode_getfh(xdr, &hdr);
2165        encode_getfattr(xdr, args->bitmask, &hdr);
2166        encode_nops(&hdr);
2167}
2168
2169/*
2170 * Encode REMOVE request
2171 */
2172static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2173                                const void *data)
2174{
2175        const struct nfs_removeargs *args = data;
2176        struct compound_hdr hdr = {
2177                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2178        };
2179
2180        encode_compound_hdr(xdr, req, &hdr);
2181        encode_sequence(xdr, &args->seq_args, &hdr);
2182        encode_putfh(xdr, args->fh, &hdr);
2183        encode_remove(xdr, &args->name, &hdr);
2184        encode_nops(&hdr);
2185}
2186
2187/*
2188 * Encode RENAME request
2189 */
2190static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2191                                const void *data)
2192{
2193        const struct nfs_renameargs *args = data;
2194        struct compound_hdr hdr = {
2195                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2196        };
2197
2198        encode_compound_hdr(xdr, req, &hdr);
2199        encode_sequence(xdr, &args->seq_args, &hdr);
2200        encode_putfh(xdr, args->old_dir, &hdr);
2201        encode_savefh(xdr, &hdr);
2202        encode_putfh(xdr, args->new_dir, &hdr);
2203        encode_rename(xdr, args->old_name, args->new_name, &hdr);
2204        encode_nops(&hdr);
2205}
2206
2207/*
2208 * Encode LINK request
2209 */
2210static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2211                              const void *data)
2212{
2213        const struct nfs4_link_arg *args = data;
2214        struct compound_hdr hdr = {
2215                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2216        };
2217
2218        encode_compound_hdr(xdr, req, &hdr);
2219        encode_sequence(xdr, &args->seq_args, &hdr);
2220        encode_putfh(xdr, args->fh, &hdr);
2221        encode_savefh(xdr, &hdr);
2222        encode_putfh(xdr, args->dir_fh, &hdr);
2223        encode_link(xdr, args->name, &hdr);
2224        encode_restorefh(xdr, &hdr);
2225        encode_getfattr(xdr, args->bitmask, &hdr);
2226        encode_nops(&hdr);
2227}
2228
2229/*
2230 * Encode CREATE request
2231 */
2232static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2233                                const void *data)
2234{
2235        const struct nfs4_create_arg *args = data;
2236        struct compound_hdr hdr = {
2237                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2238        };
2239
2240        encode_compound_hdr(xdr, req, &hdr);
2241        encode_sequence(xdr, &args->seq_args, &hdr);
2242        encode_putfh(xdr, args->dir_fh, &hdr);
2243        encode_create(xdr, args, &hdr);
2244        encode_getfh(xdr, &hdr);
2245        encode_getfattr(xdr, args->bitmask, &hdr);
2246        encode_nops(&hdr);
2247}
2248
2249/*
2250 * Encode SYMLINK request
2251 */
2252static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2253                                 const void *data)
2254{
2255        const struct nfs4_create_arg *args = data;
2256
2257        nfs4_xdr_enc_create(req, xdr, args);
2258}
2259
2260/*
2261 * Encode GETATTR request
2262 */
2263static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2264                                 const void *data)
2265{
2266        const struct nfs4_getattr_arg *args = data;
2267        struct compound_hdr hdr = {
2268                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2269        };
2270
2271        encode_compound_hdr(xdr, req, &hdr);
2272        encode_sequence(xdr, &args->seq_args, &hdr);
2273        encode_putfh(xdr, args->fh, &hdr);
2274        encode_getfattr(xdr, args->bitmask, &hdr);
2275        encode_nops(&hdr);
2276}
2277
2278/*
2279 * Encode a CLOSE request
2280 */
2281static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2282                               const void *data)
2283{
2284        const struct nfs_closeargs *args = data;
2285        struct compound_hdr hdr = {
2286                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2287        };
2288
2289        encode_compound_hdr(xdr, req, &hdr);
2290        encode_sequence(xdr, &args->seq_args, &hdr);
2291        encode_putfh(xdr, args->fh, &hdr);
2292        if (args->lr_args)
2293                encode_layoutreturn(xdr, args->lr_args, &hdr);
2294        if (args->bitmask != NULL)
2295                encode_getfattr(xdr, args->bitmask, &hdr);
2296        encode_close(xdr, args, &hdr);
2297        encode_nops(&hdr);
2298}
2299
2300/*
2301 * Encode an OPEN request
2302 */
2303static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2304                              const void *data)
2305{
2306        const struct nfs_openargs *args = data;
2307        struct compound_hdr hdr = {
2308                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2309        };
2310
2311        encode_compound_hdr(xdr, req, &hdr);
2312        encode_sequence(xdr, &args->seq_args, &hdr);
2313        encode_putfh(xdr, args->fh, &hdr);
2314        encode_open(xdr, args, &hdr);
2315        encode_getfh(xdr, &hdr);
2316        if (args->access)
2317                encode_access(xdr, args->access, &hdr);
2318        encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2319        encode_nops(&hdr);
2320}
2321
2322/*
2323 * Encode an OPEN_CONFIRM request
2324 */
2325static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2326                                      struct xdr_stream *xdr,
2327                                      const void *data)
2328{
2329        const struct nfs_open_confirmargs *args = data;
2330        struct compound_hdr hdr = {
2331                .nops   = 0,
2332        };
2333
2334        encode_compound_hdr(xdr, req, &hdr);
2335        encode_putfh(xdr, args->fh, &hdr);
2336        encode_open_confirm(xdr, args, &hdr);
2337        encode_nops(&hdr);
2338}
2339
2340/*
2341 * Encode an OPEN request with no attributes.
2342 */
2343static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2344                                     struct xdr_stream *xdr,
2345                                     const void *data)
2346{
2347        const struct nfs_openargs *args = data;
2348        struct compound_hdr hdr = {
2349                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2350        };
2351
2352        encode_compound_hdr(xdr, req, &hdr);
2353        encode_sequence(xdr, &args->seq_args, &hdr);
2354        encode_putfh(xdr, args->fh, &hdr);
2355        encode_open(xdr, args, &hdr);
2356        if (args->access)
2357                encode_access(xdr, args->access, &hdr);
2358        encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2359        encode_nops(&hdr);
2360}
2361
2362/*
2363 * Encode an OPEN_DOWNGRADE request
2364 */
2365static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2366                                        struct xdr_stream *xdr,
2367                                        const void *data)
2368{
2369        const struct nfs_closeargs *args = data;
2370        struct compound_hdr hdr = {
2371                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2372        };
2373
2374        encode_compound_hdr(xdr, req, &hdr);
2375        encode_sequence(xdr, &args->seq_args, &hdr);
2376        encode_putfh(xdr, args->fh, &hdr);
2377        if (args->lr_args)
2378                encode_layoutreturn(xdr, args->lr_args, &hdr);
2379        encode_open_downgrade(xdr, args, &hdr);
2380        encode_nops(&hdr);
2381}
2382
2383/*
2384 * Encode a LOCK request
2385 */
2386static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2387                              const void *data)
2388{
2389        const struct nfs_lock_args *args = data;
2390        struct compound_hdr hdr = {
2391                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2392        };
2393
2394        encode_compound_hdr(xdr, req, &hdr);
2395        encode_sequence(xdr, &args->seq_args, &hdr);
2396        encode_putfh(xdr, args->fh, &hdr);
2397        encode_lock(xdr, args, &hdr);
2398        encode_nops(&hdr);
2399}
2400
2401/*
2402 * Encode a LOCKT request
2403 */
2404static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2405                               const void *data)
2406{
2407        const struct nfs_lockt_args *args = data;
2408        struct compound_hdr hdr = {
2409                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2410        };
2411
2412        encode_compound_hdr(xdr, req, &hdr);
2413        encode_sequence(xdr, &args->seq_args, &hdr);
2414        encode_putfh(xdr, args->fh, &hdr);
2415        encode_lockt(xdr, args, &hdr);
2416        encode_nops(&hdr);
2417}
2418
2419/*
2420 * Encode a LOCKU request
2421 */
2422static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2423                               const void *data)
2424{
2425        const struct nfs_locku_args *args = data;
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_locku(xdr, args, &hdr);
2434        encode_nops(&hdr);
2435}
2436
2437static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2438                                           struct xdr_stream *xdr,
2439                                           const void *data)
2440{
2441        const struct nfs_release_lockowner_args *args = data;
2442        struct compound_hdr hdr = {
2443                .minorversion = 0,
2444        };
2445
2446        encode_compound_hdr(xdr, req, &hdr);
2447        encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2448        encode_nops(&hdr);
2449}
2450
2451/*
2452 * Encode a READLINK request
2453 */
2454static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2455                                  const void *data)
2456{
2457        const struct nfs4_readlink *args = data;
2458        struct compound_hdr hdr = {
2459                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2460        };
2461
2462        encode_compound_hdr(xdr, req, &hdr);
2463        encode_sequence(xdr, &args->seq_args, &hdr);
2464        encode_putfh(xdr, args->fh, &hdr);
2465        encode_readlink(xdr, args, req, &hdr);
2466
2467        xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2468                        args->pgbase, args->pglen);
2469        encode_nops(&hdr);
2470}
2471
2472/*
2473 * Encode a READDIR request
2474 */
2475static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2476                                 const void *data)
2477{
2478        const struct nfs4_readdir_arg *args = data;
2479        struct compound_hdr hdr = {
2480                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2481        };
2482
2483        encode_compound_hdr(xdr, req, &hdr);
2484        encode_sequence(xdr, &args->seq_args, &hdr);
2485        encode_putfh(xdr, args->fh, &hdr);
2486        encode_readdir(xdr, args, req, &hdr);
2487
2488        xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2489                         args->pgbase, args->count);
2490        dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2491                        __func__, hdr.replen << 2, args->pages,
2492                        args->pgbase, args->count);
2493        encode_nops(&hdr);
2494}
2495
2496/*
2497 * Encode a READ request
2498 */
2499static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2500                              const void *data)
2501{
2502        const struct nfs_pgio_args *args = data;
2503        struct compound_hdr hdr = {
2504                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2505        };
2506
2507        encode_compound_hdr(xdr, req, &hdr);
2508        encode_sequence(xdr, &args->seq_args, &hdr);
2509        encode_putfh(xdr, args->fh, &hdr);
2510        encode_read(xdr, args, &hdr);
2511
2512        xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2513                         args->pages, args->pgbase, args->count);
2514        req->rq_rcv_buf.flags |= XDRBUF_READ;
2515        encode_nops(&hdr);
2516}
2517
2518/*
2519 * Encode an SETATTR request
2520 */
2521static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2522                                 const void *data)
2523{
2524        const struct nfs_setattrargs *args = data;
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_setattr(xdr, args, args->server, &hdr);
2533        encode_getfattr(xdr, args->bitmask, &hdr);
2534        encode_nops(&hdr);
2535}
2536
2537/*
2538 * Encode a GETACL request
2539 */
2540static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2541                                const void *data)
2542{
2543        const struct nfs_getaclargs *args = data;
2544        struct compound_hdr hdr = {
2545                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2546        };
2547        const __u32 nfs4_acl_bitmap[1] = {
2548                [0] = FATTR4_WORD0_ACL,
2549        };
2550        uint32_t replen;
2551
2552        encode_compound_hdr(xdr, req, &hdr);
2553        encode_sequence(xdr, &args->seq_args, &hdr);
2554        encode_putfh(xdr, args->fh, &hdr);
2555        replen = hdr.replen + op_decode_hdr_maxsz;
2556        encode_getattr(xdr, nfs4_acl_bitmap, NULL,
2557                        ARRAY_SIZE(nfs4_acl_bitmap), &hdr);
2558
2559        xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2560                args->acl_pages, 0, args->acl_len);
2561
2562        encode_nops(&hdr);
2563}
2564
2565/*
2566 * Encode a WRITE request
2567 */
2568static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2569                               const void *data)
2570{
2571        const struct nfs_pgio_args *args = data;
2572        struct compound_hdr hdr = {
2573                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2574        };
2575
2576        encode_compound_hdr(xdr, req, &hdr);
2577        encode_sequence(xdr, &args->seq_args, &hdr);
2578        encode_putfh(xdr, args->fh, &hdr);
2579        encode_write(xdr, args, &hdr);
2580        req->rq_snd_buf.flags |= XDRBUF_WRITE;
2581        if (args->bitmask)
2582                encode_getfattr(xdr, args->bitmask, &hdr);
2583        encode_nops(&hdr);
2584}
2585
2586/*
2587 *  a COMMIT request
2588 */
2589static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2590                                const void *data)
2591{
2592        const struct nfs_commitargs *args = data;
2593        struct compound_hdr hdr = {
2594                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2595        };
2596
2597        encode_compound_hdr(xdr, req, &hdr);
2598        encode_sequence(xdr, &args->seq_args, &hdr);
2599        encode_putfh(xdr, args->fh, &hdr);
2600        encode_commit(xdr, args, &hdr);
2601        encode_nops(&hdr);
2602}
2603
2604/*
2605 * FSINFO request
2606 */
2607static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2608                                const void *data)
2609{
2610        const struct nfs4_fsinfo_arg *args = data;
2611        struct compound_hdr hdr = {
2612                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2613        };
2614
2615        encode_compound_hdr(xdr, req, &hdr);
2616        encode_sequence(xdr, &args->seq_args, &hdr);
2617        encode_putfh(xdr, args->fh, &hdr);
2618        encode_fsinfo(xdr, args->bitmask, &hdr);
2619        encode_nops(&hdr);
2620}
2621
2622/*
2623 * a PATHCONF request
2624 */
2625static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2626                                  const void *data)
2627{
2628        const struct nfs4_pathconf_arg *args = data;
2629        struct compound_hdr hdr = {
2630                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2631        };
2632
2633        encode_compound_hdr(xdr, req, &hdr);
2634        encode_sequence(xdr, &args->seq_args, &hdr);
2635        encode_putfh(xdr, args->fh, &hdr);
2636        encode_getattr(xdr, nfs4_pathconf_bitmap, args->bitmask,
2637                        ARRAY_SIZE(nfs4_pathconf_bitmap), &hdr);
2638        encode_nops(&hdr);
2639}
2640
2641/*
2642 * a STATFS request
2643 */
2644static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2645                                const void *data)
2646{
2647        const struct nfs4_statfs_arg *args = data;
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->fh, &hdr);
2655        encode_getattr(xdr, nfs4_statfs_bitmap, args->bitmask,
2656                        ARRAY_SIZE(nfs4_statfs_bitmap), &hdr);
2657        encode_nops(&hdr);
2658}
2659
2660/*
2661 * GETATTR_BITMAP request
2662 */
2663static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2664                                     struct xdr_stream *xdr,
2665                                     const void *data)
2666{
2667        const struct nfs4_server_caps_arg *args = data;
2668        const u32 *bitmask = args->bitmask;
2669        struct compound_hdr hdr = {
2670                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2671        };
2672
2673        encode_compound_hdr(xdr, req, &hdr);
2674        encode_sequence(xdr, &args->seq_args, &hdr);
2675        encode_putfh(xdr, args->fhandle, &hdr);
2676        encode_getattr(xdr, bitmask, NULL, 3, &hdr);
2677        encode_nops(&hdr);
2678}
2679
2680/*
2681 * a RENEW request
2682 */
2683static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2684                               const void *data)
2685
2686{
2687        const struct nfs_client *clp = data;
2688        struct compound_hdr hdr = {
2689                .nops   = 0,
2690        };
2691
2692        encode_compound_hdr(xdr, req, &hdr);
2693        encode_renew(xdr, clp->cl_clientid, &hdr);
2694        encode_nops(&hdr);
2695}
2696
2697/*
2698 * a SETCLIENTID request
2699 */
2700static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2701                                     struct xdr_stream *xdr,
2702                                     const void *data)
2703{
2704        const struct nfs4_setclientid *sc = data;
2705        struct compound_hdr hdr = {
2706                .nops   = 0,
2707        };
2708
2709        encode_compound_hdr(xdr, req, &hdr);
2710        encode_setclientid(xdr, sc, &hdr);
2711        encode_nops(&hdr);
2712}
2713
2714/*
2715 * a SETCLIENTID_CONFIRM request
2716 */
2717static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2718                                             struct xdr_stream *xdr,
2719                                             const void *data)
2720{
2721        const struct nfs4_setclientid_res *arg = data;
2722        struct compound_hdr hdr = {
2723                .nops   = 0,
2724        };
2725
2726        encode_compound_hdr(xdr, req, &hdr);
2727        encode_setclientid_confirm(xdr, arg, &hdr);
2728        encode_nops(&hdr);
2729}
2730
2731/*
2732 * DELEGRETURN request
2733 */
2734static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2735                                     struct xdr_stream *xdr,
2736                                     const void *data)
2737{
2738        const struct nfs4_delegreturnargs *args = data;
2739        struct compound_hdr hdr = {
2740                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2741        };
2742
2743        encode_compound_hdr(xdr, req, &hdr);
2744        encode_sequence(xdr, &args->seq_args, &hdr);
2745        encode_putfh(xdr, args->fhandle, &hdr);
2746        if (args->lr_args)
2747                encode_layoutreturn(xdr, args->lr_args, &hdr);
2748        if (args->bitmask)
2749                encode_getfattr(xdr, args->bitmask, &hdr);
2750        encode_delegreturn(xdr, args->stateid, &hdr);
2751        encode_nops(&hdr);
2752}
2753
2754/*
2755 * Encode FS_LOCATIONS request
2756 */
2757static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2758                                      struct xdr_stream *xdr,
2759                                      const void *data)
2760{
2761        const struct nfs4_fs_locations_arg *args = data;
2762        struct compound_hdr hdr = {
2763                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2764        };
2765        uint32_t replen;
2766
2767        encode_compound_hdr(xdr, req, &hdr);
2768        encode_sequence(xdr, &args->seq_args, &hdr);
2769        if (args->migration) {
2770                encode_putfh(xdr, args->fh, &hdr);
2771                replen = hdr.replen;
2772                encode_fs_locations(xdr, args->bitmask, &hdr);
2773                if (args->renew)
2774                        encode_renew(xdr, args->clientid, &hdr);
2775        } else {
2776                encode_putfh(xdr, args->dir_fh, &hdr);
2777                encode_lookup(xdr, args->name, &hdr);
2778                replen = hdr.replen;
2779                encode_fs_locations(xdr, args->bitmask, &hdr);
2780        }
2781
2782        /* Set up reply kvec to capture returned fs_locations array. */
2783        xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2784                         (struct page **)&args->page, 0, PAGE_SIZE);
2785        encode_nops(&hdr);
2786}
2787
2788/*
2789 * Encode SECINFO request
2790 */
2791static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2792                                struct xdr_stream *xdr,
2793                                const void *data)
2794{
2795        const struct nfs4_secinfo_arg *args = data;
2796        struct compound_hdr hdr = {
2797                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2798        };
2799
2800        encode_compound_hdr(xdr, req, &hdr);
2801        encode_sequence(xdr, &args->seq_args, &hdr);
2802        encode_putfh(xdr, args->dir_fh, &hdr);
2803        encode_secinfo(xdr, args->name, &hdr);
2804        encode_nops(&hdr);
2805}
2806
2807/*
2808 * Encode FSID_PRESENT request
2809 */
2810static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2811                                      struct xdr_stream *xdr,
2812                                      const void *data)
2813{
2814        const struct nfs4_fsid_present_arg *args = data;
2815        struct compound_hdr hdr = {
2816                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2817        };
2818
2819        encode_compound_hdr(xdr, req, &hdr);
2820        encode_sequence(xdr, &args->seq_args, &hdr);
2821        encode_putfh(xdr, args->fh, &hdr);
2822        encode_getfh(xdr, &hdr);
2823        if (args->renew)
2824                encode_renew(xdr, args->clientid, &hdr);
2825        encode_nops(&hdr);
2826}
2827
2828#if defined(CONFIG_NFS_V4_1)
2829/*
2830 * BIND_CONN_TO_SESSION request
2831 */
2832static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2833                                struct xdr_stream *xdr,
2834                                const void *data)
2835{
2836        const struct nfs41_bind_conn_to_session_args *args = data;
2837        struct compound_hdr hdr = {
2838                .minorversion = args->client->cl_mvops->minor_version,
2839        };
2840
2841        encode_compound_hdr(xdr, req, &hdr);
2842        encode_bind_conn_to_session(xdr, args, &hdr);
2843        encode_nops(&hdr);
2844}
2845
2846/*
2847 * EXCHANGE_ID request
2848 */
2849static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2850                                     struct xdr_stream *xdr,
2851                                     const void *data)
2852{
2853        const struct nfs41_exchange_id_args *args = data;
2854        struct compound_hdr hdr = {
2855                .minorversion = args->client->cl_mvops->minor_version,
2856        };
2857
2858        encode_compound_hdr(xdr, req, &hdr);
2859        encode_exchange_id(xdr, args, &hdr);
2860        encode_nops(&hdr);
2861}
2862
2863/*
2864 * a CREATE_SESSION request
2865 */
2866static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2867                                        struct xdr_stream *xdr,
2868                                        const void *data)
2869{
2870        const struct nfs41_create_session_args *args = data;
2871        struct compound_hdr hdr = {
2872                .minorversion = args->client->cl_mvops->minor_version,
2873        };
2874
2875        encode_compound_hdr(xdr, req, &hdr);
2876        encode_create_session(xdr, args, &hdr);
2877        encode_nops(&hdr);
2878}
2879
2880/*
2881 * a DESTROY_SESSION request
2882 */
2883static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2884                                         struct xdr_stream *xdr,
2885                                         const void *data)
2886{
2887        const struct nfs4_session *session = data;
2888        struct compound_hdr hdr = {
2889                .minorversion = session->clp->cl_mvops->minor_version,
2890        };
2891
2892        encode_compound_hdr(xdr, req, &hdr);
2893        encode_destroy_session(xdr, session, &hdr);
2894        encode_nops(&hdr);
2895}
2896
2897/*
2898 * a DESTROY_CLIENTID request
2899 */
2900static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2901                                         struct xdr_stream *xdr,
2902                                         const void *data)
2903{
2904        const struct nfs_client *clp = data;
2905        struct compound_hdr hdr = {
2906                .minorversion = clp->cl_mvops->minor_version,
2907        };
2908
2909        encode_compound_hdr(xdr, req, &hdr);
2910        encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2911        encode_nops(&hdr);
2912}
2913
2914/*
2915 * a SEQUENCE request
2916 */
2917static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2918                                  const void *data)
2919{
2920        const struct nfs4_sequence_args *args = data;
2921        struct compound_hdr hdr = {
2922                .minorversion = nfs4_xdr_minorversion(args),
2923        };
2924
2925        encode_compound_hdr(xdr, req, &hdr);
2926        encode_sequence(xdr, args, &hdr);
2927        encode_nops(&hdr);
2928}
2929
2930/*
2931 * a GET_LEASE_TIME request
2932 */
2933static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2934                                        struct xdr_stream *xdr,
2935                                        const void *data)
2936{
2937        const struct nfs4_get_lease_time_args *args = data;
2938        struct compound_hdr hdr = {
2939                .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2940        };
2941        const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2942
2943        encode_compound_hdr(xdr, req, &hdr);
2944        encode_sequence(xdr, &args->la_seq_args, &hdr);
2945        encode_putrootfh(xdr, &hdr);
2946        encode_fsinfo(xdr, lease_bitmap, &hdr);
2947        encode_nops(&hdr);
2948}
2949
2950/*
2951 * a RECLAIM_COMPLETE request
2952 */
2953static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2954                                          struct xdr_stream *xdr,
2955                                          const void *data)
2956{
2957        const struct nfs41_reclaim_complete_args *args = data;
2958        struct compound_hdr hdr = {
2959                .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2960        };
2961
2962        encode_compound_hdr(xdr, req, &hdr);
2963        encode_sequence(xdr, &args->seq_args, &hdr);
2964        encode_reclaim_complete(xdr, args, &hdr);
2965        encode_nops(&hdr);
2966}
2967
2968/*
2969 * Encode GETDEVICEINFO request
2970 */
2971static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2972                                       struct xdr_stream *xdr,
2973                                       const void *data)
2974{
2975        const struct nfs4_getdeviceinfo_args *args = data;
2976        struct compound_hdr hdr = {
2977                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2978        };
2979
2980        encode_compound_hdr(xdr, req, &hdr);
2981        encode_sequence(xdr, &args->seq_args, &hdr);
2982        encode_getdeviceinfo(xdr, args, &hdr);
2983
2984        /* set up reply kvec. Subtract notification bitmap max size (2)
2985         * so that notification bitmap is put in xdr_buf tail */
2986        xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2987                         args->pdev->pages, args->pdev->pgbase,
2988                         args->pdev->pglen);
2989
2990        encode_nops(&hdr);
2991}
2992
2993/*
2994 *  Encode LAYOUTGET request
2995 */
2996static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2997                                   struct xdr_stream *xdr,
2998                                   const void *data)
2999{
3000        const struct nfs4_layoutget_args *args = data;

3001        struct compound_hdr hdr = {
3002                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3003        };
3004
3005        encode_compound_hdr(xdr, req, &hdr);
3006        encode_sequence(xdr, &args->seq_args, &hdr);
3007        encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3008        encode_layoutget(xdr, args, &hdr);
3009
3010        xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
3011            args->layout.pages, 0, args->layout.pglen);
3012
3013        encode_nops(&hdr);
3014}
3015
3016/*
3017 *  Encode LAYOUTCOMMIT request
3018 */
3019static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
3020                                      struct xdr_stream *xdr,
3021                                      const void *priv)
3022{
3023        const struct nfs4_layoutcommit_args *args = priv;
3024        struct nfs4_layoutcommit_data *data =
3025                container_of(args, struct nfs4_layoutcommit_data, args);
3026        struct compound_hdr hdr = {
3027                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3028        };
3029
3030        encode_compound_hdr(xdr, req, &hdr);
3031        encode_sequence(xdr, &args->seq_args, &hdr);
3032        encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3033        encode_layoutcommit(xdr, data->args.inode, args, &hdr);
3034        encode_getfattr(xdr, args->bitmask, &hdr);
3035        encode_nops(&hdr);
3036}
3037
3038/*
3039 * Encode LAYOUTRETURN request
3040 */
3041static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
3042                                      struct xdr_stream *xdr,
3043                                      const void *data)
3044{
3045        const struct nfs4_layoutreturn_args *args = data;
3046        struct compound_hdr hdr = {
3047                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3048        };
3049
3050        encode_compound_hdr(xdr, req, &hdr);
3051        encode_sequence(xdr, &args->seq_args, &hdr);
3052        encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3053        encode_layoutreturn(xdr, args, &hdr);
3054        encode_nops(&hdr);
3055}
3056
3057/*
3058 * Encode SECINFO_NO_NAME request
3059 */
3060static void nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
3061                                        struct xdr_stream *xdr,
3062                                        const void *data)
3063{
3064        const struct nfs41_secinfo_no_name_args *args = data;
3065        struct compound_hdr hdr = {
3066                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3067        };
3068
3069        encode_compound_hdr(xdr, req, &hdr);
3070        encode_sequence(xdr, &args->seq_args, &hdr);
3071        encode_putrootfh(xdr, &hdr);
3072        encode_secinfo_no_name(xdr, args, &hdr);
3073        encode_nops(&hdr);
3074}
3075
3076/*
3077 *  Encode TEST_STATEID request
3078 */
3079static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
3080                                      struct xdr_stream *xdr,
3081                                      const void *data)
3082{
3083        const struct nfs41_test_stateid_args *args = data;
3084        struct compound_hdr hdr = {
3085                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3086        };
3087
3088        encode_compound_hdr(xdr, req, &hdr);
3089        encode_sequence(xdr, &args->seq_args, &hdr);
3090        encode_test_stateid(xdr, args, &hdr);
3091        encode_nops(&hdr);
3092}
3093
3094/*
3095 *  Encode FREE_STATEID request
3096 */
3097static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
3098                                     struct xdr_stream *xdr,
3099                                     const void *data)
3100{
3101        const struct nfs41_free_stateid_args *args = data;
3102        struct compound_hdr hdr = {
3103                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3104        };
3105
3106        encode_compound_hdr(xdr, req, &hdr);
3107        encode_sequence(xdr, &args->seq_args, &hdr);
3108        encode_free_stateid(xdr, args, &hdr);
3109        encode_nops(&hdr);
3110}
3111#endif /* CONFIG_NFS_V4_1 */
3112
3113static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
3114{
3115        dprintk("nfs: %s: prematurely hit end of receive buffer. "
3116                "Remaining buffer length is %tu words.\n",
3117                func, xdr->end - xdr->p);
3118}
3119
3120static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3121{
3122        ssize_t ret = xdr_stream_decode_opaque_inline(xdr, (void **)string,
3123                        NFS4_OPAQUE_LIMIT);
3124        if (unlikely(ret < 0)) {
3125                if (ret == -EBADMSG)
3126                        print_overflow_msg(__func__, xdr);
3127                return -EIO;
3128        }
3129        *len = ret;
3130        return 0;
3131}
3132
3133static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3134{
3135        __be32 *p;
3136
3137        p = xdr_inline_decode(xdr, 8);
3138        if (unlikely(!p))
3139                goto out_overflow;
3140        hdr->status = be32_to_cpup(p++);
3141        hdr->taglen = be32_to_cpup(p);
3142
3143        p = xdr_inline_decode(xdr, hdr->taglen + 4);
3144        if (unlikely(!p))
3145                goto out_overflow;
3146        hdr->tag = (char *)p;
3147        p += XDR_QUADLEN(hdr->taglen);
3148        hdr->nops = be32_to_cpup(p);
3149        if (unlikely(hdr->nops < 1))
3150                return nfs4_stat_to_errno(hdr->status);
3151        return 0;
3152out_overflow:
3153        print_overflow_msg(__func__, xdr);
3154        return -EIO;
3155}
3156
3157static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3158                int *nfs_retval)
3159{
3160        __be32 *p;
3161        uint32_t opnum;
3162        int32_t nfserr;
3163
3164        p = xdr_inline_decode(xdr, 8);
3165        if (unlikely(!p))
3166                goto out_overflow;
3167        opnum = be32_to_cpup(p++);
3168        if (unlikely(opnum != expected))
3169                goto out_bad_operation;
3170        nfserr = be32_to_cpup(p);
3171        if (nfserr == NFS_OK)
3172                *nfs_retval = 0;
3173        else
3174                *nfs_retval = nfs4_stat_to_errno(nfserr);
3175        return true;
3176out_bad_operation:
3177        dprintk("nfs: Server returned operation"
3178                " %d but we issued a request for %d\n",
3179                        opnum, expected);
3180        *nfs_retval = -EREMOTEIO;
3181        return false;
3182out_overflow:
3183        print_overflow_msg(__func__, xdr);
3184        *nfs_retval = -EIO;
3185        return false;
3186}
3187
3188static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3189{
3190        int retval;
3191
3192        __decode_op_hdr(xdr, expected, &retval);
3193        return retval;
3194}
3195
3196/* Dummy routine */
3197static int decode_ace(struct xdr_stream *xdr, void *ace)
3198{
3199        __be32 *p;
3200        unsigned int strlen;
3201        char *str;
3202
3203        p = xdr_inline_decode(xdr, 12);
3204        if (likely(p))
3205                return decode_opaque_inline(xdr, &strlen, &str);
3206        print_overflow_msg(__func__, xdr);
3207        return -EIO;
3208}
3209
3210static ssize_t
3211decode_bitmap4(struct xdr_stream *xdr, uint32_t *bitmap, size_t sz)
3212{
3213        ssize_t ret;
3214
3215        ret = xdr_stream_decode_uint32_array(xdr, bitmap, sz);
3216        if (likely(ret >= 0))
3217                return ret;
3218        if (ret == -EMSGSIZE)
3219                return sz;
3220        print_overflow_msg(__func__, xdr);
3221        return -EIO;
3222}
3223
3224static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3225{
3226        ssize_t ret;
3227        ret = decode_bitmap4(xdr, bitmap, 3);
3228        return ret < 0 ? ret : 0;
3229}
3230
3231static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3232{
3233        __be32 *p;
3234
3235        p = xdr_inline_decode(xdr, 4);
3236        if (unlikely(!p))
3237                goto out_overflow;
3238        *attrlen = be32_to_cpup(p);
3239        *savep = xdr_stream_pos(xdr);
3240        return 0;
3241out_overflow:
3242        print_overflow_msg(__func__, xdr);
3243        return -EIO;
3244}
3245
3246static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3247{
3248        if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3249                int ret;
3250                ret = decode_attr_bitmap(xdr, bitmask);
3251                if (unlikely(ret < 0))
3252                        return ret;
3253                bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3254        } else
3255                bitmask[0] = bitmask[1] = bitmask[2] = 0;
3256        dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3257                bitmask[0], bitmask[1], bitmask[2]);
3258        return 0;
3259}
3260
3261static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3262{
3263        __be32 *p;
3264        int ret = 0;
3265
3266        *type = 0;
3267        if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3268                return -EIO;
3269        if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3270                p = xdr_inline_decode(xdr, 4);
3271                if (unlikely(!p))
3272                        goto out_overflow;
3273                *type = be32_to_cpup(p);
3274                if (*type < NF4REG || *type > NF4NAMEDATTR) {
3275                        dprintk("%s: bad type %d\n", __func__, *type);
3276                        return -EIO;
3277                }
3278                bitmap[0] &= ~FATTR4_WORD0_TYPE;
3279                ret = NFS_ATTR_FATTR_TYPE;
3280        }
3281        dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3282        return ret;
3283out_overflow:
3284        print_overflow_msg(__func__, xdr);
3285        return -EIO;
3286}
3287
3288static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3289                                      uint32_t *bitmap, uint32_t *type)
3290{
3291        __be32 *p;
3292
3293        *type = 0;
3294        if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3295                return -EIO;
3296        if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3297                p = xdr_inline_decode(xdr, 4);
3298                if (unlikely(!p))
3299                        goto out_overflow;
3300                *type = be32_to_cpup(p);
3301                bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3302        }
3303        dprintk("%s: expire type=0x%x\n", __func__, *type);
3304        return 0;
3305out_overflow:
3306        print_overflow_msg(__func__, xdr);
3307        return -EIO;
3308}
3309
3310static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3311{
3312        __be32 *p;
3313        int ret = 0;
3314
3315        *change = 0;
3316        if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3317                return -EIO;
3318        if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3319                p = xdr_inline_decode(xdr, 8);
3320                if (unlikely(!p))
3321                        goto out_overflow;
3322                xdr_decode_hyper(p, change);
3323                bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3324                ret = NFS_ATTR_FATTR_CHANGE;
3325        }
3326        dprintk("%s: change attribute=%Lu\n", __func__,
3327                        (unsigned long long)*change);
3328        return ret;
3329out_overflow:
3330        print_overflow_msg(__func__, xdr);
3331        return -EIO;
3332}
3333
3334static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3335{
3336        __be32 *p;
3337        int ret = 0;
3338
3339        *size = 0;
3340        if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3341                return -EIO;
3342        if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3343                p = xdr_inline_decode(xdr, 8);
3344                if (unlikely(!p))
3345                        goto out_overflow;
3346                xdr_decode_hyper(p, size);
3347                bitmap[0] &= ~FATTR4_WORD0_SIZE;
3348                ret = NFS_ATTR_FATTR_SIZE;
3349        }
3350        dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3351        return ret;
3352out_overflow:
3353        print_overflow_msg(__func__, xdr);
3354        return -EIO;
3355}
3356
3357static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3358{
3359        __be32 *p;
3360
3361        *res = 0;
3362        if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3363                return -EIO;
3364        if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3365                p = xdr_inline_decode(xdr, 4);
3366                if (unlikely(!p))
3367                        goto out_overflow;
3368                *res = be32_to_cpup(p);
3369                bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3370        }
3371        dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3372        return 0;
3373out_overflow:
3374        print_overflow_msg(__func__, xdr);
3375        return -EIO;
3376}
3377
3378static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3379{
3380        __be32 *p;
3381
3382        *res = 0;
3383        if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3384                return -EIO;
3385        if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3386                p = xdr_inline_decode(xdr, 4);
3387                if (unlikely(!p))
3388                        goto out_overflow;
3389                *res = be32_to_cpup(p);
3390                bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3391        }
3392        dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3393        return 0;
3394out_overflow:
3395        print_overflow_msg(__func__, xdr);
3396        return -EIO;
3397}
3398
3399static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3400{
3401        __be32 *p;
3402        int ret = 0;
3403
3404        fsid->major = 0;
3405        fsid->minor = 0;
3406        if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3407                return -EIO;
3408        if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3409                p = xdr_inline_decode(xdr, 16);
3410                if (unlikely(!p))
3411                        goto out_overflow;
3412                p = xdr_decode_hyper(p, &fsid->major);
3413                xdr_decode_hyper(p, &fsid->minor);
3414                bitmap[0] &= ~FATTR4_WORD0_FSID;
3415                ret = NFS_ATTR_FATTR_FSID;
3416        }
3417        dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3418                        (unsigned long long)fsid->major,
3419                        (unsigned long long)fsid->minor);
3420        return ret;
3421out_overflow:
3422        print_overflow_msg(__func__, xdr);
3423        return -EIO;
3424}
3425
3426static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3427{
3428        __be32 *p;
3429
3430        *res = 60;
3431        if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3432                return -EIO;
3433        if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3434                p = xdr_inline_decode(xdr, 4);
3435                if (unlikely(!p))
3436                        goto out_overflow;
3437                *res = be32_to_cpup(p);
3438                bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3439        }
3440        dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3441        return 0;
3442out_overflow:
3443        print_overflow_msg(__func__, xdr);
3444        return -EIO;
3445}
3446
3447static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3448{
3449        __be32 *p;
3450
3451        if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3452                return -EIO;
3453        if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3454                p = xdr_inline_decode(xdr, 4);
3455                if (unlikely(!p))
3456                        goto out_overflow;
3457                bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3458                *res = -be32_to_cpup(p);
3459        }
3460        return 0;
3461out_overflow:
3462        print_overflow_msg(__func__, xdr);
3463        return -EIO;
3464}
3465
3466static int decode_attr_exclcreat_supported(struct xdr_stream *xdr,
3467                                 uint32_t *bitmap, uint32_t *bitmask)
3468{
3469        if (likely(bitmap[2] & FATTR4_WORD2_SUPPATTR_EXCLCREAT)) {
3470                int ret;
3471                ret = decode_attr_bitmap(xdr, bitmask);
3472                if (unlikely(ret < 0))
3473                        return ret;
3474                bitmap[2] &= ~FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3475        } else
3476                bitmask[0] = bitmask[1] = bitmask[2] = 0;
3477        dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3478                bitmask[0], bitmask[1], bitmask[2]);
3479        return 0;
3480}
3481
3482static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3483{
3484        __be32 *p;
3485        int len;
3486
3487        if (fh != NULL)
3488                memset(fh, 0, sizeof(*fh));
3489
3490        if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3491                return -EIO;
3492        if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3493                p = xdr_inline_decode(xdr, 4);
3494                if (unlikely(!p))
3495                        goto out_overflow;
3496                len = be32_to_cpup(p);
3497                if (len > NFS4_FHSIZE)
3498                        return -EIO;
3499                p = xdr_inline_decode(xdr, len);
3500                if (unlikely(!p))
3501                        goto out_overflow;
3502                if (fh != NULL) {
3503                        memcpy(fh->data, p, len);
3504                        fh->size = len;
3505                }
3506                bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3507        }
3508        return 0;
3509out_overflow:
3510        print_overflow_msg(__func__, xdr);
3511        return -EIO;
3512}
3513
3514static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3515{
3516        __be32 *p;
3517
3518        *res = 0;
3519        if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3520                return -EIO;
3521        if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3522                p = xdr_inline_decode(xdr, 4);
3523                if (unlikely(!p))
3524                        goto out_overflow;
3525                *res = be32_to_cpup(p);
3526                bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3527        }
3528        dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3529        return 0;
3530out_overflow:
3531        print_overflow_msg(__func__, xdr);
3532        return -EIO;
3533}
3534
3535static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3536{
3537        __be32 *p;
3538        int ret = 0;
3539
3540        *fileid = 0;
3541        if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3542                return -EIO;
3543        if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3544                p = xdr_inline_decode(xdr, 8);
3545                if (unlikely(!p))
3546                        goto out_overflow;
3547                xdr_decode_hyper(p, fileid);
3548                bitmap[0] &= ~FATTR4_WORD0_FILEID;
3549                ret = NFS_ATTR_FATTR_FILEID;
3550        }
3551        dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3552        return ret;
3553out_overflow:
3554        print_overflow_msg(__func__, xdr);
3555        return -EIO;
3556}
3557
3558static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3559{
3560        __be32 *p;
3561        int ret = 0;
3562
3563        *fileid = 0;
3564        if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3565                return -EIO;
3566        if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3567                p = xdr_inline_decode(xdr, 8);
3568                if (unlikely(!p))
3569                        goto out_overflow;
3570                xdr_decode_hyper(p, fileid);
3571                bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3572                ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3573        }
3574        dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3575        return ret;
3576out_overflow:
3577        print_overflow_msg(__func__, xdr);
3578        return -EIO;
3579}
3580
3581static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3582{
3583        __be32 *p;
3584        int status = 0;
3585
3586        *res = 0;
3587        if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3588                return -EIO;
3589        if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3590                p = xdr_inline_decode(xdr, 8);
3591                if (unlikely(!p))
3592                        goto out_overflow;
3593                xdr_decode_hyper(p, res);
3594                bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3595        }
3596        dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3597        return status;
3598out_overflow:
3599        print_overflow_msg(__func__, xdr);
3600        return -EIO;
3601}
3602
3603static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3604{
3605        __be32 *p;
3606        int status = 0;
3607
3608        *res = 0;
3609        if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3610                return -EIO;
3611        if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3612                p = xdr_inline_decode(xdr, 8);
3613                if (unlikely(!p))
3614                        goto out_overflow;
3615                xdr_decode_hyper(p, res);
3616                bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3617        }
3618        dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3619        return status;
3620out_overflow:
3621        print_overflow_msg(__func__, xdr);
3622        return -EIO;
3623}
3624
3625static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3626{
3627        __be32 *p;
3628        int status = 0;
3629
3630        *res = 0;
3631        if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3632                return -EIO;
3633        if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3634                p = xdr_inline_decode(xdr, 8);
3635                if (unlikely(!p))
3636                        goto out_overflow;
3637                xdr_decode_hyper(p, res);
3638                bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3639        }
3640        dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3641        return status;
3642out_overflow:
3643        print_overflow_msg(__func__, xdr);
3644        return -EIO;
3645}
3646
3647static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3648{
3649        u32 n;
3650        __be32 *p;
3651        int status = 0;
3652
3653        p = xdr_inline_decode(xdr, 4);
3654        if (unlikely(!p))
3655                goto out_overflow;
3656        n = be32_to_cpup(p);
3657        if (n == 0)
3658                goto root_path;
3659        dprintk("pathname4: ");
3660        if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3661                dprintk("cannot parse %d components in path\n", n);
3662                goto out_eio;
3663        }
3664        for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3665                struct nfs4_string *component = &path->components[path->ncomponents];
3666                status = decode_opaque_inline(xdr, &component->len, &component->data);
3667                if (unlikely(status != 0))
3668                        goto out_eio;
3669                ifdebug (XDR)
3670                        pr_cont("%s%.*s ",
3671                                (path->ncomponents != n ? "/ " : ""),
3672                                component->len, component->data);
3673        }
3674out:
3675        return status;
3676root_path:
3677/* a root pathname is sent as a zero component4 */
3678        path->ncomponents = 1;
3679        path->components[0].len=0;
3680        path->components[0].data=NULL;
3681        dprintk("pathname4: /\n");
3682        goto out;
3683out_eio:
3684        dprintk(" status %d", status);
3685        status = -EIO;
3686        goto out;
3687out_overflow:
3688        print_overflow_msg(__func__, xdr);
3689        return -EIO;
3690}
3691
3692static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3693{
3694        int n;
3695        __be32 *p;
3696        int status = -EIO;
3697
3698        if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3699                goto out;
3700        status = 0;
3701        if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3702                goto out;
3703        bitmap[0] &= ~FATTR4_WORD0_FS_LOCATIONS;
3704        status = -EIO;
3705        /* Ignore borken servers that return unrequested attrs */
3706        if (unlikely(res == NULL))
3707                goto out;
3708        dprintk("%s: fsroot:\n", __func__);
3709        status = decode_pathname(xdr, &res->fs_path);
3710        if (unlikely(status != 0))
3711                goto out;
3712        p = xdr_inline_decode(xdr, 4);
3713        if (unlikely(!p))
3714                goto out_overflow;
3715        n = be32_to_cpup(p);
3716        if (n <= 0)
3717                goto out_eio;
3718        for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3719                u32 m;
3720                struct nfs4_fs_location *loc;
3721
3722                if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3723                        break;
3724                loc = &res->locations[res->nlocations];
3725                p = xdr_inline_decode(xdr, 4);
3726                if (unlikely(!p))
3727                        goto out_overflow;
3728                m = be32_to_cpup(p);
3729
3730                dprintk("%s: servers:\n", __func__);
3731                for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3732                        struct nfs4_string *server;
3733
3734                        if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3735                                unsigned int i;
3736                                dprintk("%s: using first %u of %u servers "
3737                                        "returned for location %u\n",
3738                                                __func__,
3739                                                NFS4_FS_LOCATION_MAXSERVERS,
3740                                                m, res->nlocations);
3741                                for (i = loc->nservers; i < m; i++) {
3742                                        unsigned int len;
3743                                        char *data;
3744                                        status = decode_opaque_inline(xdr, &len, &data);
3745                                        if (unlikely(status != 0))
3746                                                goto out_eio;
3747                                }
3748                                break;
3749                        }
3750                        server = &loc->servers[loc->nservers];
3751                        status = decode_opaque_inline(xdr, &server->len, &server->data);
3752                        if (unlikely(status != 0))
3753                                goto out_eio;
3754                        dprintk("%s ", server->data);
3755                }
3756                status = decode_pathname(xdr, &loc->rootpath);
3757                if (unlikely(status != 0))
3758                        goto out_eio;
3759        }
3760        if (res->nlocations != 0)
3761                status = NFS_ATTR_FATTR_V4_LOCATIONS;
3762out:
3763        dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3764        return status;
3765out_overflow:
3766        print_overflow_msg(__func__, xdr);
3767out_eio:
3768        status = -EIO;
3769        goto out;
3770}
3771
3772static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3773{
3774        __be32 *p;
3775        int status = 0;
3776
3777        *res = 0;
3778        if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3779                return -EIO;
3780        if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3781                p = xdr_inline_decode(xdr, 8);
3782                if (unlikely(!p))
3783                        goto out_overflow;
3784                xdr_decode_hyper(p, res);
3785                bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3786        }
3787        dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3788        return status;
3789out_overflow:
3790        print_overflow_msg(__func__, xdr);
3791        return -EIO;
3792}
3793
3794static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3795{
3796        __be32 *p;
3797        int status = 0;
3798
3799        *maxlink = 1;
3800        if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3801                return -EIO;
3802        if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3803                p = xdr_inline_decode(xdr, 4);
3804                if (unlikely(!p))
3805                        goto out_overflow;
3806                *maxlink = be32_to_cpup(p);
3807                bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3808        }
3809        dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3810        return status;
3811out_overflow:
3812        print_overflow_msg(__func__, xdr);
3813        return -EIO;
3814}
3815
3816static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3817{
3818        __be32 *p;
3819        int status = 0;
3820
3821        *maxname = 1024;
3822        if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3823                return -EIO;
3824        if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3825                p = xdr_inline_decode(xdr, 4);
3826                if (unlikely(!p))
3827                        goto out_overflow;
3828                *maxname = be32_to_cpup(p);
3829                bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3830        }
3831        dprintk("%s: maxname=%u\n", __func__, *maxname);
3832        return status;
3833out_overflow:
3834        print_overflow_msg(__func__, xdr);
3835        return -EIO;
3836}
3837
3838static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3839{
3840        __be32 *p;
3841        int status = 0;
3842
3843        *res = 1024;
3844        if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3845                return -EIO;
3846        if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3847                uint64_t maxread;
3848                p = xdr_inline_decode(xdr, 8);
3849                if (unlikely(!p))
3850                        goto out_overflow;
3851                xdr_decode_hyper(p, &maxread);
3852                if (maxread > 0x7FFFFFFF)
3853                        maxread = 0x7FFFFFFF;
3854                *res = (uint32_t)maxread;
3855                bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3856        }
3857        dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3858        return status;
3859out_overflow:
3860        print_overflow_msg(__func__, xdr);
3861        return -EIO;
3862}
3863
3864static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3865{
3866        __be32 *p;
3867        int status = 0;
3868
3869        *res = 1024;
3870        if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3871                return -EIO;
3872        if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3873                uint64_t maxwrite;
3874                p = xdr_inline_decode(xdr, 8);
3875                if (unlikely(!p))
3876                        goto out_overflow;
3877                xdr_decode_hyper(p, &maxwrite);
3878                if (maxwrite > 0x7FFFFFFF)
3879                        maxwrite = 0x7FFFFFFF;
3880                *res = (uint32_t)maxwrite;
3881                bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3882        }
3883        dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3884        return status;
3885out_overflow:
3886        print_overflow_msg(__func__, xdr);
3887        return -EIO;
3888}
3889
3890static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3891{
3892        uint32_t tmp;
3893        __be32 *p;
3894        int ret = 0;
3895
3896        *mode = 0;
3897        if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3898                return -EIO;
3899        if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3900                p = xdr_inline_decode(xdr, 4);
3901                if (unlikely(!p))
3902                        goto out_overflow;
3903                tmp = be32_to_cpup(p);
3904                *mode = tmp & ~S_IFMT;
3905                bitmap[1] &= ~FATTR4_WORD1_MODE;
3906                ret = NFS_ATTR_FATTR_MODE;
3907        }
3908        dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3909        return ret;
3910out_overflow:
3911        print_overflow_msg(__func__, xdr);
3912        return -EIO;
3913}
3914
3915static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3916{
3917        __be32 *p;
3918        int ret = 0;
3919
3920        *nlink = 1;
3921        if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3922                return -EIO;
3923        if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3924                p = xdr_inline_decode(xdr, 4);
3925                if (unlikely(!p))
3926                        goto out_overflow;
3927                *nlink = be32_to_cpup(p);
3928                bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3929                ret = NFS_ATTR_FATTR_NLINK;
3930        }
3931        dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3932        return ret;
3933out_overflow:
3934        print_overflow_msg(__func__, xdr);
3935        return -EIO;
3936}
3937
3938static ssize_t decode_nfs4_string(struct xdr_stream *xdr,
3939                struct nfs4_string *name, gfp_t gfp_flags)
3940{
3941        ssize_t ret;
3942
3943        ret = xdr_stream_decode_string_dup(xdr, &name->data,
3944                        XDR_MAX_NETOBJ, gfp_flags);
3945        name->len = 0;
3946        if (ret > 0)
3947                name->len = ret;
3948        return ret;
3949}
3950
3951static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3952                const struct nfs_server *server, kuid_t *uid,
3953                struct nfs4_string *owner_name)
3954{
3955        ssize_t len;
3956        char *p;
3957
3958        *uid = make_kuid(&init_user_ns, -2);
3959        if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3960                return -EIO;
3961        if (!(bitmap[1] & FATTR4_WORD1_OWNER))
3962                return 0;
3963        bitmap[1] &= ~FATTR4_WORD1_OWNER;
3964
3965        if (owner_name != NULL) {
3966                len = decode_nfs4_string(xdr, owner_name, GFP_NOIO);
3967                if (len <= 0)
3968                        goto out;
3969                dprintk("%s: name=%s\n", __func__, owner_name->data);
3970                return NFS_ATTR_FATTR_OWNER_NAME;
3971        } else {
3972                len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
3973                                XDR_MAX_NETOBJ);
3974                if (len <= 0 || nfs_map_name_to_uid(server, p, len, uid) != 0)
3975                        goto out;
3976                dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3977                return NFS_ATTR_FATTR_OWNER;
3978        }
3979out:
3980        if (len != -EBADMSG)
3981                return 0;
3982        print_overflow_msg(__func__, xdr);
3983        return -EIO;
3984}
3985
3986static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3987                const struct nfs_server *server, kgid_t *gid,
3988                struct nfs4_string *group_name)
3989{
3990        ssize_t len;
3991        char *p;
3992
3993        *gid = make_kgid(&init_user_ns, -2);
3994        if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3995                return -EIO;
3996        if (!(bitmap[1] & FATTR4_WORD1_OWNER_GROUP))
3997                return 0;
3998        bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3999
4000        if (group_name != NULL) {

4001                len = decode_nfs4_string(xdr, group_name, GFP_NOIO);
4002                if (len <= 0)
4003                        goto out;
4004                dprintk("%s: name=%s\n", __func__, group_name->data);
4005                return NFS_ATTR_FATTR_GROUP_NAME;
4006        } else {
4007                len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
4008                                XDR_MAX_NETOBJ);
4009                if (len <= 0 || nfs_map_group_to_gid(server, p, len, gid) != 0)
4010                        goto out;
4011                dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
4012                return NFS_ATTR_FATTR_GROUP;
4013        }
4014out:
4015        if (len != -EBADMSG)
4016                return 0;
4017        print_overflow_msg(__func__, xdr);
4018        return -EIO;
4019}
4020
4021static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
4022{
4023        uint32_t major = 0, minor = 0;
4024        __be32 *p;
4025        int ret = 0;
4026
4027        *rdev = MKDEV(0,0);
4028        if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
4029                return -EIO;
4030        if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
4031                dev_t tmp;
4032
4033                p = xdr_inline_decode(xdr, 8);
4034                if (unlikely(!p))
4035                        goto out_overflow;
4036                major = be32_to_cpup(p++);
4037                minor = be32_to_cpup(p);
4038                tmp = MKDEV(major, minor);
4039                if (MAJOR(tmp) == major && MINOR(tmp) == minor)
4040                        *rdev = tmp;
4041                bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
4042                ret = NFS_ATTR_FATTR_RDEV;
4043        }
4044        dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
4045        return ret;
4046out_overflow:
4047        print_overflow_msg(__func__, xdr);
4048        return -EIO;
4049}
4050
4051static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4052{
4053        __be32 *p;
4054        int status = 0;
4055
4056        *res = 0;
4057        if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
4058                return -EIO;
4059        if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
4060                p = xdr_inline_decode(xdr, 8);
4061                if (unlikely(!p))
4062                        goto out_overflow;
4063                xdr_decode_hyper(p, res);
4064                bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
4065        }
4066        dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
4067        return status;
4068out_overflow:
4069        print_overflow_msg(__func__, xdr);
4070        return -EIO;
4071}
4072
4073static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4074{
4075        __be32 *p;
4076        int status = 0;
4077
4078        *res = 0;
4079        if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
4080                return -EIO;
4081        if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
4082                p = xdr_inline_decode(xdr, 8);
4083                if (unlikely(!p))
4084                        goto out_overflow;
4085                xdr_decode_hyper(p, res);
4086                bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
4087        }
4088        dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
4089        return status;
4090out_overflow:
4091        print_overflow_msg(__func__, xdr);
4092        return -EIO;
4093}
4094
4095static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4096{
4097        __be32 *p;
4098        int status = 0;
4099
4100        *res = 0;
4101        if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
4102                return -EIO;
4103        if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
4104                p = xdr_inline_decode(xdr, 8);
4105                if (unlikely(!p))
4106                        goto out_overflow;
4107                xdr_decode_hyper(p, res);
4108                bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
4109        }
4110        dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4111        return status;
4112out_overflow:
4113        print_overflow_msg(__func__, xdr);
4114        return -EIO;
4115}
4116
4117static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4118{
4119        __be32 *p;
4120        int ret = 0;
4121
4122        *used = 0;
4123        if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4124                return -EIO;
4125        if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4126                p = xdr_inline_decode(xdr, 8);
4127                if (unlikely(!p))
4128                        goto out_overflow;
4129                xdr_decode_hyper(p, used);
4130                bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4131                ret = NFS_ATTR_FATTR_SPACE_USED;
4132        }
4133        dprintk("%s: space used=%Lu\n", __func__,
4134                        (unsigned long long)*used);
4135        return ret;
4136out_overflow:
4137        print_overflow_msg(__func__, xdr);
4138        return -EIO;
4139}
4140
4141static __be32 *
4142xdr_decode_nfstime4(__be32 *p, struct timespec *t)
4143{
4144        __u64 sec;
4145
4146        p = xdr_decode_hyper(p, &sec);
4147        t-> tv_sec = (time_t)sec;
4148        t->tv_nsec = be32_to_cpup(p++);
4149        return p;
4150}
4151
4152static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
4153{
4154        __be32 *p;
4155
4156        p = xdr_inline_decode(xdr, nfstime4_maxsz << 2);
4157        if (unlikely(!p))
4158                goto out_overflow;
4159        xdr_decode_nfstime4(p, time);
4160        return 0;
4161out_overflow:
4162        print_overflow_msg(__func__, xdr);
4163        return -EIO;
4164}
4165
4166static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4167{
4168        int status = 0;
4169
4170        time->tv_sec = 0;
4171        time->tv_nsec = 0;
4172        if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4173                return -EIO;
4174        if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4175                status = decode_attr_time(xdr, time);
4176                if (status == 0)
4177                        status = NFS_ATTR_FATTR_ATIME;
4178                bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4179        }
4180        dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4181        return status;
4182}
4183
4184static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4185{
4186        int status = 0;
4187
4188        time->tv_sec = 0;
4189        time->tv_nsec = 0;
4190        if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4191                return -EIO;
4192        if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4193                status = decode_attr_time(xdr, time);
4194                if (status == 0)
4195                        status = NFS_ATTR_FATTR_CTIME;
4196                bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4197        }
4198        dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4199        return status;
4200}
4201
4202static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4203                                  struct timespec *time)
4204{
4205        int status = 0;
4206
4207        time->tv_sec = 0;
4208        time->tv_nsec = 0;
4209        if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4210                return -EIO;
4211        if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4212                status = decode_attr_time(xdr, time);
4213                bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4214        }
4215        dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4216                (long)time->tv_nsec);
4217        return status;
4218}
4219
4220static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4221                                        struct nfs4_label *label)
4222{
4223        uint32_t pi = 0;
4224        uint32_t lfs = 0;
4225        __u32 len;
4226        __be32 *p;
4227        int status = 0;
4228
4229        if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4230                return -EIO;
4231        if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4232                p = xdr_inline_decode(xdr, 4);
4233                if (unlikely(!p))
4234                        goto out_overflow;
4235                lfs = be32_to_cpup(p++);
4236                p = xdr_inline_decode(xdr, 4);
4237                if (unlikely(!p))
4238                        goto out_overflow;
4239                pi = be32_to_cpup(p++);
4240                p = xdr_inline_decode(xdr, 4);
4241                if (unlikely(!p))
4242                        goto out_overflow;
4243                len = be32_to_cpup(p++);
4244                p = xdr_inline_decode(xdr, len);
4245                if (unlikely(!p))
4246                        goto out_overflow;
4247                if (len < NFS4_MAXLABELLEN) {
4248                        if (label) {
4249                                memcpy(label->label, p, len);
4250                                label->len = len;
4251                                label->pi = pi;
4252                                label->lfs = lfs;
4253                                status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4254                        }
4255                        bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4256                } else
4257                        printk(KERN_WARNING "%s: label too long (%u)!\n",
4258                                        __func__, len);
4259        }
4260        if (label && label->label)
4261                dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4262                        (char *)label->label, label->len, label->pi, label->lfs);
4263        return status;
4264
4265out_overflow:
4266        print_overflow_msg(__func__, xdr);
4267        return -EIO;
4268}
4269
4270static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4271{
4272        int status = 0;
4273
4274        time->tv_sec = 0;
4275        time->tv_nsec = 0;
4276        if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4277                return -EIO;
4278        if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4279                status = decode_attr_time(xdr, time);
4280                if (status == 0)
4281                        status = NFS_ATTR_FATTR_MTIME;
4282                bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4283        }
4284        dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4285        return status;
4286}
4287
4288static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4289{
4290        unsigned int attrwords = XDR_QUADLEN(attrlen);
4291        unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4292
4293        if (unlikely(attrwords != nwords)) {
4294                dprintk("%s: server returned incorrect attribute length: "
4295                        "%u %c %u\n",
4296                                __func__,
4297                                attrwords << 2,
4298                                (attrwords < nwords) ? '<' : '>',
4299                                nwords << 2);
4300                return -EIO;
4301        }
4302        return 0;
4303}
4304
4305static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4306{
4307        __be32 *p;
4308
4309        p = xdr_inline_decode(xdr, 20);
4310        if (unlikely(!p))
4311                goto out_overflow;
4312        cinfo->atomic = be32_to_cpup(p++);
4313        p = xdr_decode_hyper(p, &cinfo->before);
4314        xdr_decode_hyper(p, &cinfo->after);
4315        return 0;
4316out_overflow:
4317        print_overflow_msg(__func__, xdr);
4318        return -EIO;
4319}
4320
4321static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4322{
4323        __be32 *p;
4324        uint32_t supp, acc;
4325        int status;
4326
4327        status = decode_op_hdr(xdr, OP_ACCESS);
4328        if (status)
4329                return status;
4330        p = xdr_inline_decode(xdr, 8);
4331        if (unlikely(!p))
4332                goto out_overflow;
4333        supp = be32_to_cpup(p++);
4334        acc = be32_to_cpup(p);
4335        *supported = supp;
4336        *access = acc;
4337        return 0;
4338out_overflow:
4339        print_overflow_msg(__func__, xdr);
4340        return -EIO;
4341}
4342
4343static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4344{
4345        ssize_t ret = xdr_stream_decode_opaque_fixed(xdr, buf, len);
4346        if (unlikely(ret < 0)) {
4347                print_overflow_msg(__func__, xdr);
4348                return -EIO;
4349        }
4350        return 0;
4351}
4352
4353static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4354{
4355        return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4356}
4357
4358static int decode_open_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4359{
4360        stateid->type = NFS4_OPEN_STATEID_TYPE;
4361        return decode_stateid(xdr, stateid);
4362}
4363
4364static int decode_lock_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4365{
4366        stateid->type = NFS4_LOCK_STATEID_TYPE;
4367        return decode_stateid(xdr, stateid);
4368}
4369
4370static int decode_delegation_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4371{
4372        stateid->type = NFS4_DELEGATION_STATEID_TYPE;
4373        return decode_stateid(xdr, stateid);
4374}
4375
4376static int decode_invalid_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4377{
4378        nfs4_stateid dummy;
4379
4380        nfs4_stateid_copy(stateid, &invalid_stateid);
4381        return decode_stateid(xdr, &dummy);
4382}
4383
4384static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4385{
4386        int status;
4387
4388        status = decode_op_hdr(xdr, OP_CLOSE);
4389        if (status != -EIO)
4390                nfs_increment_open_seqid(status, res->seqid);
4391        if (!status)
4392                status = decode_invalid_stateid(xdr, &res->stateid);
4393        return status;
4394}
4395
4396static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4397{
4398        return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4399}
4400
4401static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4402{
4403        return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4404}
4405
4406static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4407{
4408        int status;
4409
4410        status = decode_op_hdr(xdr, OP_COMMIT);
4411        if (!status)
4412                status = decode_write_verifier(xdr, &res->verf->verifier);
4413        return status;
4414}
4415
4416static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4417{
4418        __be32 *p;
4419        uint32_t bmlen;
4420        int status;
4421
4422        status = decode_op_hdr(xdr, OP_CREATE);
4423        if (status)
4424                return status;
4425        if ((status = decode_change_info(xdr, cinfo)))
4426                return status;
4427        p = xdr_inline_decode(xdr, 4);
4428        if (unlikely(!p))
4429                goto out_overflow;
4430        bmlen = be32_to_cpup(p);
4431        p = xdr_inline_decode(xdr, bmlen << 2);
4432        if (likely(p))
4433                return 0;
4434out_overflow:
4435        print_overflow_msg(__func__, xdr);
4436        return -EIO;
4437}
4438
4439static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4440{
4441        unsigned int savep;
4442        uint32_t attrlen, bitmap[3] = {0};
4443        int status;
4444
4445        if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4446                goto xdr_error;
4447        if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4448                goto xdr_error;
4449        if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4450                goto xdr_error;
4451        if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4452                goto xdr_error;
4453        if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4454                                                 &res->fh_expire_type)) != 0)
4455                goto xdr_error;
4456        if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4457                goto xdr_error;
4458        if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4459                goto xdr_error;
4460        if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4461                goto xdr_error;
4462        if ((status = decode_attr_exclcreat_supported(xdr, bitmap,
4463                                res->exclcreat_bitmask)) != 0)
4464                goto xdr_error;
4465        status = verify_attr_len(xdr, savep, attrlen);
4466xdr_error:
4467        dprintk("%s: xdr returned %d!\n", __func__, -status);
4468        return status;
4469}
4470
4471static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4472{
4473        unsigned int savep;
4474        uint32_t attrlen, bitmap[3] = {0};
4475        int status;
4476
4477        if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4478                goto xdr_error;
4479        if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4480                goto xdr_error;
4481        if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4482                goto xdr_error;
4483
4484        if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4485                goto xdr_error;
4486        if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4487                goto xdr_error;
4488        if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4489                goto xdr_error;
4490
4491        status = -EIO;
4492        if (unlikely(bitmap[0]))
4493                goto xdr_error;
4494
4495        if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4496                goto xdr_error;
4497        if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4498                goto xdr_error;
4499        if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4500                goto xdr_error;
4501
4502        status = verify_attr_len(xdr, savep, attrlen);
4503xdr_error:
4504        dprintk("%s: xdr returned %d!\n", __func__, -status);
4505        return status;
4506}
4507
4508static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4509{
4510        unsigned int savep;
4511        uint32_t attrlen, bitmap[3] = {0};
4512        int status;
4513
4514        if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4515                goto xdr_error;
4516        if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4517                goto xdr_error;
4518        if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4519                goto xdr_error;
4520
4521        if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4522                goto xdr_error;
4523        if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4524                goto xdr_error;
4525
4526        status = verify_attr_len(xdr, savep, attrlen);
4527xdr_error:
4528        dprintk("%s: xdr returned %d!\n", __func__, -status);
4529        return status;
4530}
4531
4532static int decode_threshold_hint(struct xdr_stream *xdr,
4533                                  uint32_t *bitmap,
4534                                  uint64_t *res,
4535                                  uint32_t hint_bit)
4536{
4537        __be32 *p;
4538
4539        *res = 0;
4540        if (likely(bitmap[0] & hint_bit)) {
4541                p = xdr_inline_decode(xdr, 8);
4542                if (unlikely(!p))
4543                        goto out_overflow;
4544                xdr_decode_hyper(p, res);
4545        }
4546        return 0;
4547out_overflow:
4548        print_overflow_msg(__func__, xdr);
4549        return -EIO;
4550}
4551
4552static int decode_first_threshold_item4(struct xdr_stream *xdr,
4553                                        struct nfs4_threshold *res)
4554{
4555        __be32 *p;
4556        unsigned int savep;
4557        uint32_t bitmap[3] = {0,}, attrlen;
4558        int status;
4559
4560        /* layout type */
4561        p = xdr_inline_decode(xdr, 4);
4562        if (unlikely(!p)) {
4563                print_overflow_msg(__func__, xdr);
4564                return -EIO;
4565        }
4566        res->l_type = be32_to_cpup(p);
4567
4568        /* thi_hintset bitmap */
4569        status = decode_attr_bitmap(xdr, bitmap);
4570        if (status < 0)
4571                goto xdr_error;
4572
4573        /* thi_hintlist length */
4574        status = decode_attr_length(xdr, &attrlen, &savep);
4575        if (status < 0)
4576                goto xdr_error;
4577        /* thi_hintlist */
4578        status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4579        if (status < 0)
4580                goto xdr_error;
4581        status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4582        if (status < 0)
4583                goto xdr_error;
4584        status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4585                                       THRESHOLD_RD_IO);
4586        if (status < 0)
4587                goto xdr_error;
4588        status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4589                                       THRESHOLD_WR_IO);
4590        if (status < 0)
4591                goto xdr_error;
4592
4593        status = verify_attr_len(xdr, savep, attrlen);
4594        res->bm = bitmap[0];
4595
4596        dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4597                 __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4598                res->wr_io_sz);
4599xdr_error:
4600        dprintk("%s ret=%d!\n", __func__, status);
4601        return status;
4602}
4603
4604/*
4605 * Thresholds on pNFS direct I/O vrs MDS I/O
4606 */
4607static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4608                                    uint32_t *bitmap,
4609                                    struct nfs4_threshold *res)
4610{
4611        __be32 *p;
4612        int status = 0;
4613        uint32_t num;
4614
4615        if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4616                return -EIO;
4617        if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4618                /* Did the server return an unrequested attribute? */
4619                if (unlikely(res == NULL))
4620                        return -EREMOTEIO;
4621                p = xdr_inline_decode(xdr, 4);
4622                if (unlikely(!p))
4623                        goto out_overflow;
4624                num = be32_to_cpup(p);
4625                if (num == 0)
4626                        return 0;
4627                if (num > 1)
4628                        printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4629                                "drivers per filesystem not supported\n",
4630                                __func__);
4631
4632                status = decode_first_threshold_item4(xdr, res);
4633                bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4634        }
4635        return status;
4636out_overflow:
4637        print_overflow_msg(__func__, xdr);
4638        return -EIO;
4639}
4640
4641static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4642                struct nfs_fattr *fattr, struct nfs_fh *fh,
4643                struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4644                const struct nfs_server *server)
4645{
4646        int status;
4647        umode_t fmode = 0;
4648        uint32_t type;
4649        int32_t err;
4650
4651        status = decode_attr_type(xdr, bitmap, &type);
4652        if (status < 0)
4653                goto xdr_error;
4654        fattr->mode = 0;
4655        if (status != 0) {
4656                fattr->mode |= nfs_type2fmt[type];
4657                fattr->valid |= status;
4658        }
4659
4660        status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4661        if (status < 0)
4662                goto xdr_error;
4663        fattr->valid |= status;
4664
4665        status = decode_attr_size(xdr, bitmap, &fattr->size);
4666        if (status < 0)
4667                goto xdr_error;
4668        fattr->valid |= status;
4669
4670        status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4671        if (status < 0)
4672                goto xdr_error;
4673        fattr->valid |= status;
4674
4675        err = 0;
4676        status = decode_attr_error(xdr, bitmap, &err);
4677        if (status < 0)
4678                goto xdr_error;
4679
4680        status = decode_attr_filehandle(xdr, bitmap, fh);
4681        if (status < 0)
4682                goto xdr_error;
4683
4684        status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4685        if (status < 0)
4686                goto xdr_error;
4687        fattr->valid |= status;
4688
4689        status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4690        if (status < 0)
4691                goto xdr_error;
4692        fattr->valid |= status;
4693
4694        status = -EIO;
4695        if (unlikely(bitmap[0]))
4696                goto xdr_error;
4697
4698        status = decode_attr_mode(xdr, bitmap, &fmode);
4699        if (status < 0)
4700                goto xdr_error;
4701        if (status != 0) {
4702                fattr->mode |= fmode;
4703                fattr->valid |= status;
4704        }
4705
4706        status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4707        if (status < 0)
4708                goto xdr_error;
4709        fattr->valid |= status;
4710
4711        status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4712        if (status < 0)
4713                goto xdr_error;
4714        fattr->valid |= status;
4715
4716        status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4717        if (status < 0)
4718                goto xdr_error;
4719        fattr->valid |= status;
4720
4721        status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4722        if (status < 0)
4723                goto xdr_error;
4724        fattr->valid |= status;
4725
4726        status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4727        if (status < 0)
4728                goto xdr_error;
4729        fattr->valid |= status;
4730
4731        status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4732        if (status < 0)
4733                goto xdr_error;
4734        fattr->valid |= status;
4735
4736        status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4737        if (status < 0)
4738                goto xdr_error;
4739        fattr->valid |= status;
4740
4741        status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4742        if (status < 0)
4743                goto xdr_error;
4744        fattr->valid |= status;
4745
4746        status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4747        if (status < 0)
4748                goto xdr_error;
4749        fattr->valid |= status;
4750
4751        status = -EIO;
4752        if (unlikely(bitmap[1]))
4753                goto xdr_error;
4754
4755        status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4756        if (status < 0)
4757                goto xdr_error;
4758
4759        if (label) {
4760                status = decode_attr_security_label(xdr, bitmap, label);
4761                if (status < 0)
4762                        goto xdr_error;
4763                fattr->valid |= status;
4764        }
4765
4766xdr_error:
4767        dprintk("%s: xdr returned %d\n", __func__, -status);
4768        return status;
4769}
4770
4771static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4772                struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4773                struct nfs4_label *label, const struct nfs_server *server)
4774{
4775        unsigned int savep;
4776        uint32_t attrlen,
4777                 bitmap[3] = {0};
4778        int status;
4779
4780        status = decode_op_hdr(xdr, OP_GETATTR);
4781        if (status < 0)
4782                goto xdr_error;
4783
4784        status = decode_attr_bitmap(xdr, bitmap);
4785        if (status < 0)
4786                goto xdr_error;
4787
4788        status = decode_attr_length(xdr, &attrlen, &savep);
4789        if (status < 0)
4790                goto xdr_error;
4791
4792        status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4793                                        label, server);
4794        if (status < 0)
4795                goto xdr_error;
4796
4797        status = verify_attr_len(xdr, savep, attrlen);
4798xdr_error:
4799        dprintk("%s: xdr returned %d\n", __func__, -status);
4800        return status;
4801}
4802
4803static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4804                struct nfs4_label *label, const struct nfs_server *server)
4805{
4806        return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4807}
4808
4809static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4810                const struct nfs_server *server)
4811{
4812        return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4813}
4814
4815/*
4816 * Decode potentially multiple layout types.
4817 */
4818static int decode_pnfs_layout_types(struct xdr_stream *xdr,
4819                                    struct nfs_fsinfo *fsinfo)
4820{
4821        __be32 *p;
4822        uint32_t i;
4823
4824        p = xdr_inline_decode(xdr, 4);
4825        if (unlikely(!p))
4826                goto out_overflow;
4827        fsinfo->nlayouttypes = be32_to_cpup(p);
4828
4829        /* pNFS is not supported by the underlying file system */
4830        if (fsinfo->nlayouttypes == 0)
4831                return 0;
4832
4833        /* Decode and set first layout type, move xdr->p past unused types */
4834        p = xdr_inline_decode(xdr, fsinfo->nlayouttypes * 4);
4835        if (unlikely(!p))
4836                goto out_overflow;
4837
4838        /* If we get too many, then just cap it at the max */
4839        if (fsinfo->nlayouttypes > NFS_MAX_LAYOUT_TYPES) {
4840                printk(KERN_INFO "NFS: %s: Warning: Too many (%u) pNFS layout types\n",
4841                        __func__, fsinfo->nlayouttypes);
4842                fsinfo->nlayouttypes = NFS_MAX_LAYOUT_TYPES;
4843        }
4844
4845        for(i = 0; i < fsinfo->nlayouttypes; ++i)
4846                fsinfo->layouttype[i] = be32_to_cpup(p++);
4847        return 0;
4848out_overflow:
4849        print_overflow_msg(__func__, xdr);
4850        return -EIO;
4851}
4852
4853/*
4854 * The type of file system exported.
4855 * Note we must ensure that layouttype is set in any non-error case.
4856 */
4857static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4858                                struct nfs_fsinfo *fsinfo)
4859{
4860        int status = 0;
4861
4862        dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4863        if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4864                return -EIO;
4865        if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4866                status = decode_pnfs_layout_types(xdr, fsinfo);
4867                bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4868        }
4869        return status;
4870}
4871
4872/*
4873 * The prefered block size for layout directed io
4874 */
4875static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4876                                      uint32_t *res)
4877{
4878        __be32 *p;
4879
4880        dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4881        *res = 0;
4882        if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4883                p = xdr_inline_decode(xdr, 4);
4884                if (unlikely(!p)) {
4885                        print_overflow_msg(__func__, xdr);
4886                        return -EIO;
4887                }
4888                *res = be32_to_cpup(p);
4889                bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4890        }
4891        return 0;
4892}
4893
4894/*
4895 * The granularity of a CLONE operation.
4896 */
4897static int decode_attr_clone_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4898                                     uint32_t *res)
4899{
4900        __be32 *p;
4901
4902        dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4903        *res = 0;
4904        if (bitmap[2] & FATTR4_WORD2_CLONE_BLKSIZE) {
4905                p = xdr_inline_decode(xdr, 4);
4906                if (unlikely(!p)) {
4907                        print_overflow_msg(__func__, xdr);
4908                        return -EIO;
4909                }
4910                *res = be32_to_cpup(p);
4911                bitmap[2] &= ~FATTR4_WORD2_CLONE_BLKSIZE;
4912        }
4913        return 0;
4914}
4915
4916static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4917{
4918        unsigned int savep;
4919        uint32_t attrlen, bitmap[3];
4920        int status;
4921
4922        if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4923                goto xdr_error;
4924        if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4925                goto xdr_error;
4926        if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4927                goto xdr_error;
4928
4929        fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4930
4931        if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4932                goto xdr_error;
4933        if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4934                goto xdr_error;
4935        if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4936                goto xdr_error;
4937        fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4938        if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4939                goto xdr_error;
4940        fsinfo->wtpref = fsinfo->wtmax;
4941
4942        status = -EIO;
4943        if (unlikely(bitmap[0]))
4944                goto xdr_error;
4945
4946        status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4947        if (status != 0)
4948                goto xdr_error;
4949        status = decode_attr_pnfstype(xdr, bitmap, fsinfo);
4950        if (status != 0)
4951                goto xdr_error;
4952
4953        status = -EIO;
4954        if (unlikely(bitmap[1]))
4955                goto xdr_error;
4956
4957        status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4958        if (status)
4959                goto xdr_error;
4960        status = decode_attr_clone_blksize(xdr, bitmap, &fsinfo->clone_blksize);
4961        if (status)
4962                goto xdr_error;
4963
4964        status = verify_attr_len(xdr, savep, attrlen);
4965xdr_error:
4966        dprintk("%s: xdr returned %d!\n", __func__, -status);
4967        return status;
4968}
4969
4970static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4971{
4972        __be32 *p;
4973        uint32_t len;
4974        int status;
4975
4976        /* Zero handle first to allow comparisons */
4977        memset(fh, 0, sizeof(*fh));
4978
4979        status = decode_op_hdr(xdr, OP_GETFH);
4980        if (status)
4981                return status;
4982
4983        p = xdr_inline_decode(xdr, 4);
4984        if (unlikely(!p))
4985                goto out_overflow;
4986        len = be32_to_cpup(p);
4987        if (len > NFS4_FHSIZE)
4988                return -EIO;
4989        fh->size = len;
4990        p = xdr_inline_decode(xdr, len);
4991        if (unlikely(!p))
4992                goto out_overflow;
4993        memcpy(fh->data, p, len);
4994        return 0;
4995out_overflow:
4996        print_overflow_msg(__func__, xdr);
4997        return -EIO;
4998}
4999
5000static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)

5001{
5002        int status;
5003
5004        status = decode_op_hdr(xdr, OP_LINK);
5005        if (status)
5006                return status;
5007        return decode_change_info(xdr, cinfo);
5008}
5009
5010/*
5011 * We create the owner, so we know a proper owner.id length is 4.
5012 */
5013static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
5014{
5015        uint64_t offset, length, clientid;
5016        __be32 *p;
5017        uint32_t namelen, type;
5018
5019        p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
5020        if (unlikely(!p))
5021                goto out_overflow;
5022        p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
5023        p = xdr_decode_hyper(p, &length);
5024        type = be32_to_cpup(p++); /* 4 byte read */
5025        if (fl != NULL) { /* manipulate file lock */
5026                fl->fl_start = (loff_t)offset;
5027                fl->fl_end = fl->fl_start + (loff_t)length - 1;
5028                if (length == ~(uint64_t)0)
5029                        fl->fl_end = OFFSET_MAX;
5030                fl->fl_type = F_WRLCK;
5031                if (type & 1)
5032                        fl->fl_type = F_RDLCK;
5033                fl->fl_pid = 0;
5034        }
5035        p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
5036        namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
5037        p = xdr_inline_decode(xdr, namelen); /* variable size field */
5038        if (likely(p))
5039                return -NFS4ERR_DENIED;
5040out_overflow:
5041        print_overflow_msg(__func__, xdr);
5042        return -EIO;
5043}
5044
5045static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
5046{
5047        int status;
5048
5049        status = decode_op_hdr(xdr, OP_LOCK);
5050        if (status == -EIO)
5051                goto out;
5052        if (status == 0) {
5053                status = decode_lock_stateid(xdr, &res->stateid);
5054                if (unlikely(status))
5055                        goto out;
5056        } else if (status == -NFS4ERR_DENIED)
5057                status = decode_lock_denied(xdr, NULL);
5058        if (res->open_seqid != NULL)
5059                nfs_increment_open_seqid(status, res->open_seqid);
5060        nfs_increment_lock_seqid(status, res->lock_seqid);
5061out:
5062        return status;
5063}
5064
5065static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
5066{
5067        int status;
5068        status = decode_op_hdr(xdr, OP_LOCKT);
5069        if (status == -NFS4ERR_DENIED)
5070                return decode_lock_denied(xdr, res->denied);
5071        return status;
5072}
5073
5074static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
5075{
5076        int status;
5077
5078        status = decode_op_hdr(xdr, OP_LOCKU);
5079        if (status != -EIO)
5080                nfs_increment_lock_seqid(status, res->seqid);
5081        if (status == 0)
5082                status = decode_lock_stateid(xdr, &res->stateid);
5083        return status;
5084}
5085
5086static int decode_release_lockowner(struct xdr_stream *xdr)
5087{
5088        return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
5089}
5090
5091static int decode_lookup(struct xdr_stream *xdr)
5092{
5093        return decode_op_hdr(xdr, OP_LOOKUP);
5094}
5095
5096static int decode_lookupp(struct xdr_stream *xdr)
5097{
5098        return decode_op_hdr(xdr, OP_LOOKUPP);
5099}
5100
5101/* This is too sick! */
5102static int decode_space_limit(struct xdr_stream *xdr,
5103                unsigned long *pagemod_limit)
5104{
5105        __be32 *p;
5106        uint32_t limit_type, nblocks, blocksize;
5107        u64 maxsize = 0;
5108
5109        p = xdr_inline_decode(xdr, 12);
5110        if (unlikely(!p))
5111                goto out_overflow;
5112        limit_type = be32_to_cpup(p++);
5113        switch (limit_type) {
5114        case NFS4_LIMIT_SIZE:
5115                xdr_decode_hyper(p, &maxsize);
5116                break;
5117        case NFS4_LIMIT_BLOCKS:
5118                nblocks = be32_to_cpup(p++);
5119                blocksize = be32_to_cpup(p);
5120                maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
5121        }
5122        maxsize >>= PAGE_SHIFT;
5123        *pagemod_limit = min_t(u64, maxsize, ULONG_MAX);
5124        return 0;
5125out_overflow:
5126        print_overflow_msg(__func__, xdr);
5127        return -EIO;
5128}
5129
5130static int decode_rw_delegation(struct xdr_stream *xdr,
5131                uint32_t delegation_type,
5132                struct nfs_openres *res)
5133{
5134        __be32 *p;
5135        int status;
5136
5137        status = decode_delegation_stateid(xdr, &res->delegation);
5138        if (unlikely(status))
5139                return status;
5140        p = xdr_inline_decode(xdr, 4);
5141        if (unlikely(!p))
5142                goto out_overflow;
5143        res->do_recall = be32_to_cpup(p);
5144
5145        switch (delegation_type) {
5146        case NFS4_OPEN_DELEGATE_READ:
5147                res->delegation_type = FMODE_READ;
5148                break;
5149        case NFS4_OPEN_DELEGATE_WRITE:
5150                res->delegation_type = FMODE_WRITE|FMODE_READ;
5151                if (decode_space_limit(xdr, &res->pagemod_limit) < 0)
5152                                return -EIO;
5153        }
5154        return decode_ace(xdr, NULL);
5155out_overflow:
5156        print_overflow_msg(__func__, xdr);
5157        return -EIO;
5158}
5159
5160static int decode_no_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5161{
5162        __be32 *p;
5163        uint32_t why_no_delegation;
5164
5165        p = xdr_inline_decode(xdr, 4);
5166        if (unlikely(!p))
5167                goto out_overflow;
5168        why_no_delegation = be32_to_cpup(p);
5169        switch (why_no_delegation) {
5170                case WND4_CONTENTION:
5171                case WND4_RESOURCE:
5172                        xdr_inline_decode(xdr, 4);
5173                        /* Ignore for now */
5174        }
5175        return 0;
5176out_overflow:
5177        print_overflow_msg(__func__, xdr);
5178        return -EIO;
5179}
5180
5181static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5182{
5183        __be32 *p;
5184        uint32_t delegation_type;
5185
5186        p = xdr_inline_decode(xdr, 4);
5187        if (unlikely(!p))
5188                goto out_overflow;
5189        delegation_type = be32_to_cpup(p);
5190        res->delegation_type = 0;
5191        switch (delegation_type) {
5192        case NFS4_OPEN_DELEGATE_NONE:
5193                return 0;
5194        case NFS4_OPEN_DELEGATE_READ:
5195        case NFS4_OPEN_DELEGATE_WRITE:
5196                return decode_rw_delegation(xdr, delegation_type, res);
5197        case NFS4_OPEN_DELEGATE_NONE_EXT:
5198                return decode_no_delegation(xdr, res);
5199        }
5200        return -EIO;
5201out_overflow:
5202        print_overflow_msg(__func__, xdr);
5203        return -EIO;
5204}
5205
5206static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
5207{
5208        __be32 *p;
5209        uint32_t savewords, bmlen, i;
5210        int status;
5211
5212        if (!__decode_op_hdr(xdr, OP_OPEN, &status))
5213                return status;
5214        nfs_increment_open_seqid(status, res->seqid);
5215        if (status)
5216                return status;
5217        status = decode_open_stateid(xdr, &res->stateid);
5218        if (unlikely(status))
5219                return status;
5220
5221        decode_change_info(xdr, &res->cinfo);
5222
5223        p = xdr_inline_decode(xdr, 8);
5224        if (unlikely(!p))
5225                goto out_overflow;
5226        res->rflags = be32_to_cpup(p++);
5227        bmlen = be32_to_cpup(p);
5228        if (bmlen > 10)
5229                goto xdr_error;
5230
5231        p = xdr_inline_decode(xdr, bmlen << 2);
5232        if (unlikely(!p))
5233                goto out_overflow;
5234        savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5235        for (i = 0; i < savewords; ++i)
5236                res->attrset[i] = be32_to_cpup(p++);
5237        for (; i < NFS4_BITMAP_SIZE; i++)
5238                res->attrset[i] = 0;
5239
5240        return decode_delegation(xdr, res);
5241xdr_error:
5242        dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5243        return -EIO;
5244out_overflow:
5245        print_overflow_msg(__func__, xdr);
5246        return -EIO;
5247}
5248
5249static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5250{
5251        int status;
5252
5253        status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5254        if (status != -EIO)
5255                nfs_increment_open_seqid(status, res->seqid);
5256        if (!status)
5257                status = decode_open_stateid(xdr, &res->stateid);
5258        return status;
5259}
5260
5261static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5262{
5263        int status;
5264
5265        status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5266        if (status != -EIO)
5267                nfs_increment_open_seqid(status, res->seqid);
5268        if (!status)
5269                status = decode_open_stateid(xdr, &res->stateid);
5270        return status;
5271}
5272
5273static int decode_putfh(struct xdr_stream *xdr)
5274{
5275        return decode_op_hdr(xdr, OP_PUTFH);
5276}
5277
5278static int decode_putrootfh(struct xdr_stream *xdr)
5279{
5280        return decode_op_hdr(xdr, OP_PUTROOTFH);
5281}
5282
5283static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5284                       struct nfs_pgio_res *res)
5285{
5286        __be32 *p;
5287        uint32_t count, eof, recvd;
5288        int status;
5289
5290        status = decode_op_hdr(xdr, OP_READ);
5291        if (status)
5292                return status;
5293        p = xdr_inline_decode(xdr, 8);
5294        if (unlikely(!p))
5295                goto out_overflow;
5296        eof = be32_to_cpup(p++);
5297        count = be32_to_cpup(p);
5298        recvd = xdr_read_pages(xdr, count);
5299        if (count > recvd) {
5300                dprintk("NFS: server cheating in read reply: "
5301                                "count %u > recvd %u\n", count, recvd);
5302                count = recvd;
5303                eof = 0;
5304        }
5305        res->eof = eof;
5306        res->count = count;
5307        return 0;
5308out_overflow:
5309        print_overflow_msg(__func__, xdr);
5310        return -EIO;
5311}
5312
5313static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5314{
5315        int             status;
5316        __be32          verf[2];
5317
5318        status = decode_op_hdr(xdr, OP_READDIR);
5319        if (!status)
5320                status = decode_verifier(xdr, readdir->verifier.data);
5321        if (unlikely(status))
5322                return status;
5323        memcpy(verf, readdir->verifier.data, sizeof(verf));
5324        dprintk("%s: verifier = %08x:%08x\n",
5325                        __func__, verf[0], verf[1]);
5326        return xdr_read_pages(xdr, xdr->buf->page_len);
5327}
5328
5329static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5330{
5331        struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5332        u32 len, recvd;
5333        __be32 *p;
5334        int status;
5335
5336        status = decode_op_hdr(xdr, OP_READLINK);
5337        if (status)
5338                return status;
5339
5340        /* Convert length of symlink */
5341        p = xdr_inline_decode(xdr, 4);
5342        if (unlikely(!p))
5343                goto out_overflow;
5344        len = be32_to_cpup(p);
5345        if (len >= rcvbuf->page_len || len <= 0) {
5346                dprintk("nfs: server returned giant symlink!\n");
5347                return -ENAMETOOLONG;
5348        }
5349        recvd = xdr_read_pages(xdr, len);
5350        if (recvd < len) {
5351                dprintk("NFS: server cheating in readlink reply: "
5352                                "count %u > recvd %u\n", len, recvd);
5353                return -EIO;
5354        }
5355        /*
5356         * The XDR encode routine has set things up so that
5357         * the link text will be copied directly into the
5358         * buffer.  We just have to do overflow-checking,
5359         * and and null-terminate the text (the VFS expects
5360         * null-termination).
5361         */
5362        xdr_terminate_string(rcvbuf, len);
5363        return 0;
5364out_overflow:
5365        print_overflow_msg(__func__, xdr);
5366        return -EIO;
5367}
5368
5369static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5370{
5371        int status;
5372
5373        status = decode_op_hdr(xdr, OP_REMOVE);
5374        if (status)
5375                goto out;
5376        status = decode_change_info(xdr, cinfo);
5377out:
5378        return status;
5379}
5380
5381static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5382              struct nfs4_change_info *new_cinfo)
5383{
5384        int status;
5385
5386        status = decode_op_hdr(xdr, OP_RENAME);
5387        if (status)
5388                goto out;
5389        if ((status = decode_change_info(xdr, old_cinfo)))
5390                goto out;
5391        status = decode_change_info(xdr, new_cinfo);
5392out:
5393        return status;
5394}
5395
5396static int decode_renew(struct xdr_stream *xdr)
5397{
5398        return decode_op_hdr(xdr, OP_RENEW);
5399}
5400
5401static int
5402decode_restorefh(struct xdr_stream *xdr)
5403{
5404        return decode_op_hdr(xdr, OP_RESTOREFH);
5405}
5406
5407static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5408                         struct nfs_getaclres *res)
5409{
5410        unsigned int savep;
5411        uint32_t attrlen,
5412                 bitmap[3] = {0};
5413        int status;
5414        unsigned int pg_offset;
5415
5416        res->acl_len = 0;
5417        if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5418                goto out;
5419
5420        xdr_enter_page(xdr, xdr->buf->page_len);
5421
5422        /* Calculate the offset of the page data */
5423        pg_offset = xdr->buf->head[0].iov_len;
5424
5425        if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5426                goto out;
5427        if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5428                goto out;
5429
5430        if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5431                return -EIO;
5432        if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5433
5434                /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5435                 * are stored with the acl data to handle the problem of
5436                 * variable length bitmaps.*/
5437                res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5438                res->acl_len = attrlen;
5439
5440                /* Check for receive buffer overflow */
5441                if (res->acl_len > (xdr->nwords << 2) ||
5442                    res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5443                        res->acl_flags |= NFS4_ACL_TRUNC;
5444                        dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5445                                        attrlen, xdr->nwords << 2);
5446                }
5447        } else
5448                status = -EOPNOTSUPP;
5449
5450out:
5451        return status;
5452}
5453
5454static int
5455decode_savefh(struct xdr_stream *xdr)
5456{
5457        return decode_op_hdr(xdr, OP_SAVEFH);
5458}
5459
5460static int decode_setattr(struct xdr_stream *xdr)
5461{
5462        int status;
5463
5464        status = decode_op_hdr(xdr, OP_SETATTR);
5465        if (status)
5466                return status;
5467        if (decode_bitmap4(xdr, NULL, 0) >= 0)
5468                return 0;
5469        print_overflow_msg(__func__, xdr);
5470        return -EIO;
5471}
5472
5473static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5474{
5475        __be32 *p;
5476        uint32_t opnum;
5477        int32_t nfserr;
5478
5479        p = xdr_inline_decode(xdr, 8);
5480        if (unlikely(!p))
5481                goto out_overflow;
5482        opnum = be32_to_cpup(p++);
5483        if (opnum != OP_SETCLIENTID) {
5484                dprintk("nfs: decode_setclientid: Server returned operation"
5485                        " %d\n", opnum);
5486                return -EIO;
5487        }
5488        nfserr = be32_to_cpup(p);
5489        if (nfserr == NFS_OK) {
5490                p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5491                if (unlikely(!p))
5492                        goto out_overflow;
5493                p = xdr_decode_hyper(p, &res->clientid);
5494                memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5495        } else if (nfserr == NFSERR_CLID_INUSE) {
5496                uint32_t len;
5497
5498                /* skip netid string */
5499                p = xdr_inline_decode(xdr, 4);
5500                if (unlikely(!p))
5501                        goto out_overflow;
5502                len = be32_to_cpup(p);
5503                p = xdr_inline_decode(xdr, len);
5504                if (unlikely(!p))
5505                        goto out_overflow;
5506
5507                /* skip uaddr string */
5508                p = xdr_inline_decode(xdr, 4);
5509                if (unlikely(!p))
5510                        goto out_overflow;
5511                len = be32_to_cpup(p);
5512                p = xdr_inline_decode(xdr, len);
5513                if (unlikely(!p))
5514                        goto out_overflow;
5515                return -NFSERR_CLID_INUSE;
5516        } else
5517                return nfs4_stat_to_errno(nfserr);
5518
5519        return 0;
5520out_overflow:
5521        print_overflow_msg(__func__, xdr);
5522        return -EIO;
5523}
5524
5525static int decode_setclientid_confirm(struct xdr_stream *xdr)
5526{
5527        return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5528}
5529
5530static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5531{
5532        __be32 *p;
5533        int status;
5534
5535        status = decode_op_hdr(xdr, OP_WRITE);
5536        if (status)
5537                return status;
5538
5539        p = xdr_inline_decode(xdr, 8);
5540        if (unlikely(!p))
5541                goto out_overflow;
5542        res->count = be32_to_cpup(p++);
5543        res->verf->committed = be32_to_cpup(p++);
5544        return decode_write_verifier(xdr, &res->verf->verifier);
5545out_overflow:
5546        print_overflow_msg(__func__, xdr);
5547        return -EIO;
5548}
5549
5550static int decode_delegreturn(struct xdr_stream *xdr)
5551{
5552        return decode_op_hdr(xdr, OP_DELEGRETURN);
5553}
5554
5555static int decode_secinfo_gss(struct xdr_stream *xdr,
5556                              struct nfs4_secinfo4 *flavor)
5557{
5558        u32 oid_len;
5559        __be32 *p;
5560
5561        p = xdr_inline_decode(xdr, 4);
5562        if (unlikely(!p))
5563                goto out_overflow;
5564        oid_len = be32_to_cpup(p);
5565        if (oid_len > GSS_OID_MAX_LEN)
5566                goto out_err;
5567
5568        p = xdr_inline_decode(xdr, oid_len);
5569        if (unlikely(!p))
5570                goto out_overflow;
5571        memcpy(flavor->flavor_info.oid.data, p, oid_len);
5572        flavor->flavor_info.oid.len = oid_len;
5573
5574        p = xdr_inline_decode(xdr, 8);
5575        if (unlikely(!p))
5576                goto out_overflow;
5577        flavor->flavor_info.qop = be32_to_cpup(p++);
5578        flavor->flavor_info.service = be32_to_cpup(p);
5579
5580        return 0;
5581
5582out_overflow:
5583        print_overflow_msg(__func__, xdr);
5584        return -EIO;
5585out_err:
5586        return -EINVAL;
5587}
5588
5589static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5590{
5591        struct nfs4_secinfo4 *sec_flavor;
5592        unsigned int i, num_flavors;
5593        int status;
5594        __be32 *p;
5595
5596        p = xdr_inline_decode(xdr, 4);
5597        if (unlikely(!p))
5598                goto out_overflow;
5599
5600        res->flavors->num_flavors = 0;
5601        num_flavors = be32_to_cpup(p);
5602
5603        for (i = 0; i < num_flavors; i++) {
5604                sec_flavor = &res->flavors->flavors[i];
5605                if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5606                        break;
5607
5608                p = xdr_inline_decode(xdr, 4);
5609                if (unlikely(!p))
5610                        goto out_overflow;
5611                sec_flavor->flavor = be32_to_cpup(p);
5612
5613                if (sec_flavor->flavor == RPC_AUTH_GSS) {
5614                        status = decode_secinfo_gss(xdr, sec_flavor);
5615                        if (status)
5616                                goto out;
5617                }
5618                res->flavors->num_flavors++;
5619        }
5620
5621        status = 0;
5622out:
5623        return status;
5624out_overflow:
5625        print_overflow_msg(__func__, xdr);
5626        return -EIO;
5627}
5628
5629static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5630{
5631        int status = decode_op_hdr(xdr, OP_SECINFO);
5632        if (status)
5633                return status;
5634        return decode_secinfo_common(xdr, res);
5635}
5636
5637#if defined(CONFIG_NFS_V4_1)
5638static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5639{
5640        int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5641        if (status)
5642                return status;
5643        return decode_secinfo_common(xdr, res);
5644}
5645
5646static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5647{
5648        __be32 *p;
5649        uint32_t bitmap_words;
5650        unsigned int i;
5651
5652        p = xdr_inline_decode(xdr, 4);
5653        if (!p)
5654                return -EIO;
5655        bitmap_words = be32_to_cpup(p++);
5656        if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5657                return -EIO;
5658        p = xdr_inline_decode(xdr, 4 * bitmap_words);
5659        for (i = 0; i < bitmap_words; i++)
5660                op_map->u.words[i] = be32_to_cpup(p++);
5661
5662        return 0;
5663}
5664
5665static int decode_exchange_id(struct xdr_stream *xdr,
5666                              struct nfs41_exchange_id_res *res)
5667{
5668        __be32 *p;
5669        uint32_t dummy;
5670        char *dummy_str;
5671        int status;
5672        uint32_t impl_id_count;
5673
5674        status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5675        if (status)
5676                return status;
5677
5678        p = xdr_inline_decode(xdr, 8);
5679        if (unlikely(!p))
5680                goto out_overflow;
5681        xdr_decode_hyper(p, &res->clientid);
5682        p = xdr_inline_decode(xdr, 12);
5683        if (unlikely(!p))
5684                goto out_overflow;
5685        res->seqid = be32_to_cpup(p++);
5686        res->flags = be32_to_cpup(p++);
5687
5688        res->state_protect.how = be32_to_cpup(p);
5689        switch (res->state_protect.how) {
5690        case SP4_NONE:
5691                break;
5692        case SP4_MACH_CRED:
5693                status = decode_op_map(xdr, &res->state_protect.enforce);
5694                if (status)
5695                        return status;
5696                status = decode_op_map(xdr, &res->state_protect.allow);
5697                if (status)
5698                        return status;
5699                break;
5700        default:
5701                WARN_ON_ONCE(1);
5702                return -EIO;
5703        }
5704
5705        /* server_owner4.so_minor_id */
5706        p = xdr_inline_decode(xdr, 8);
5707        if (unlikely(!p))
5708                goto out_overflow;
5709        p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5710
5711        /* server_owner4.so_major_id */
5712        status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5713        if (unlikely(status))
5714                return status;
5715        memcpy(res->server_owner->major_id, dummy_str, dummy);
5716        res->server_owner->major_id_sz = dummy;
5717
5718        /* server_scope4 */
5719        status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5720        if (unlikely(status))
5721                return status;
5722        memcpy(res->server_scope->server_scope, dummy_str, dummy);
5723        res->server_scope->server_scope_sz = dummy;
5724
5725        /* Implementation Id */
5726        p = xdr_inline_decode(xdr, 4);
5727        if (unlikely(!p))
5728                goto out_overflow;
5729        impl_id_count = be32_to_cpup(p++);
5730
5731        if (impl_id_count) {
5732                /* nii_domain */
5733                status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5734                if (unlikely(status))
5735                        return status;
5736                memcpy(res->impl_id->domain, dummy_str, dummy);
5737
5738                /* nii_name */
5739                status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5740                if (unlikely(status))
5741                        return status;
5742                memcpy(res->impl_id->name, dummy_str, dummy);
5743
5744                /* nii_date */
5745                p = xdr_inline_decode(xdr, 12);
5746                if (unlikely(!p))
5747                        goto out_overflow;
5748                p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5749                res->impl_id->date.nseconds = be32_to_cpup(p);
5750
5751                /* if there's more than one entry, ignore the rest */
5752        }
5753        return 0;
5754out_overflow:
5755        print_overflow_msg(__func__, xdr);
5756        return -EIO;
5757}
5758
5759static int decode_chan_attrs(struct xdr_stream *xdr,
5760                             struct nfs4_channel_attrs *attrs)
5761{
5762        __be32 *p;
5763        u32 nr_attrs, val;
5764
5765        p = xdr_inline_decode(xdr, 28);
5766        if (unlikely(!p))
5767                goto out_overflow;
5768        val = be32_to_cpup(p++);        /* headerpadsz */
5769        if (val)
5770                return -EINVAL;         /* no support for header padding yet */
5771        attrs->max_rqst_sz = be32_to_cpup(p++);
5772        attrs->max_resp_sz = be32_to_cpup(p++);
5773        attrs->max_resp_sz_cached = be32_to_cpup(p++);
5774        attrs->max_ops = be32_to_cpup(p++);
5775        attrs->max_reqs = be32_to_cpup(p++);
5776        nr_attrs = be32_to_cpup(p);
5777        if (unlikely(nr_attrs > 1)) {
5778                printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5779                        "count %u\n", __func__, nr_attrs);
5780                return -EINVAL;
5781        }
5782        if (nr_attrs == 1) {
5783                p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5784                if (unlikely(!p))
5785                        goto out_overflow;
5786        }
5787        return 0;
5788out_overflow:
5789        print_overflow_msg(__func__, xdr);
5790        return -EIO;
5791}
5792
5793static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5794{
5795        return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5796}
5797
5798static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5799                                struct nfs41_bind_conn_to_session_res *res)
5800{
5801        __be32 *p;
5802        int status;
5803
5804        status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5805        if (!status)
5806                status = decode_sessionid(xdr, &res->sessionid);
5807        if (unlikely(status))
5808                return status;
5809
5810        /* dir flags, rdma mode bool */
5811        p = xdr_inline_decode(xdr, 8);
5812        if (unlikely(!p))
5813                goto out_overflow;
5814
5815        res->dir = be32_to_cpup(p++);
5816        if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5817                return -EIO;
5818        if (be32_to_cpup(p) == 0)
5819                res->use_conn_in_rdma_mode = false;
5820        else
5821                res->use_conn_in_rdma_mode = true;
5822
5823        return 0;
5824out_overflow:
5825        print_overflow_msg(__func__, xdr);
5826        return -EIO;
5827}
5828
5829static int decode_create_session(struct xdr_stream *xdr,
5830                                 struct nfs41_create_session_res *res)
5831{
5832        __be32 *p;
5833        int status;
5834
5835        status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5836        if (!status)
5837                status = decode_sessionid(xdr, &res->sessionid);
5838        if (unlikely(status))
5839                return status;
5840
5841        /* seqid, flags */
5842        p = xdr_inline_decode(xdr, 8);
5843        if (unlikely(!p))
5844                goto out_overflow;
5845        res->seqid = be32_to_cpup(p++);
5846        res->flags = be32_to_cpup(p);
5847
5848        /* Channel attributes */
5849        status = decode_chan_attrs(xdr, &res->fc_attrs);
5850        if (!status)
5851                status = decode_chan_attrs(xdr, &res->bc_attrs);
5852        return status;
5853out_overflow:
5854        print_overflow_msg(__func__, xdr);
5855        return -EIO;
5856}
5857
5858static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5859{
5860        return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5861}
5862
5863static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5864{
5865        return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5866}
5867
5868static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5869{
5870        return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5871}
5872#endif /* CONFIG_NFS_V4_1 */
5873
5874static int decode_sequence(struct xdr_stream *xdr,
5875                           struct nfs4_sequence_res *res,
5876                           struct rpc_rqst *rqstp)
5877{
5878#if defined(CONFIG_NFS_V4_1)
5879        struct nfs4_session *session;
5880        struct nfs4_sessionid id;
5881        u32 dummy;
5882        int status;
5883        __be32 *p;
5884
5885        if (res->sr_slot == NULL)
5886                return 0;
5887        if (!res->sr_slot->table->session)
5888                return 0;
5889
5890        status = decode_op_hdr(xdr, OP_SEQUENCE);
5891        if (!status)
5892                status = decode_sessionid(xdr, &id);
5893        if (unlikely(status))
5894                goto out_err;
5895
5896        /*
5897         * If the server returns different values for sessionID, slotID or
5898         * sequence number, the server is looney tunes.
5899         */
5900        status = -EREMOTEIO;
5901        session = res->sr_slot->table->session;
5902
5903        if (memcmp(id.data, session->sess_id.data,
5904                   NFS4_MAX_SESSIONID_LEN)) {
5905                dprintk("%s Invalid session id\n", __func__);
5906                goto out_err;
5907        }
5908
5909        p = xdr_inline_decode(xdr, 20);
5910        if (unlikely(!p))
5911                goto out_overflow;
5912
5913        /* seqid */
5914        dummy = be32_to_cpup(p++);
5915        if (dummy != res->sr_slot->seq_nr) {
5916                dprintk("%s Invalid sequence number\n", __func__);
5917                goto out_err;
5918        }
5919        /* slot id */
5920        dummy = be32_to_cpup(p++);
5921        if (dummy != res->sr_slot->slot_nr) {
5922                dprintk("%s Invalid slot id\n", __func__);
5923                goto out_err;
5924        }
5925        /* highest slot id */
5926        res->sr_highest_slotid = be32_to_cpup(p++);
5927        /* target highest slot id */
5928        res->sr_target_highest_slotid = be32_to_cpup(p++);
5929        /* result flags */
5930        res->sr_status_flags = be32_to_cpup(p);
5931        status = 0;
5932out_err:
5933        res->sr_status = status;
5934        return status;
5935out_overflow:
5936        print_overflow_msg(__func__, xdr);
5937        status = -EIO;
5938        goto out_err;
5939#else  /* CONFIG_NFS_V4_1 */
5940        return 0;
5941#endif /* CONFIG_NFS_V4_1 */
5942}
5943
5944#if defined(CONFIG_NFS_V4_1)
5945static int decode_layout_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
5946{
5947        stateid->type = NFS4_LAYOUT_STATEID_TYPE;
5948        return decode_stateid(xdr, stateid);
5949}
5950
5951static int decode_getdeviceinfo(struct xdr_stream *xdr,
5952                                struct nfs4_getdeviceinfo_res *res)
5953{
5954        struct pnfs_device *pdev = res->pdev;
5955        __be32 *p;
5956        uint32_t len, type;
5957        int status;
5958
5959        status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5960        if (status) {
5961                if (status == -ETOOSMALL) {
5962                        p = xdr_inline_decode(xdr, 4);
5963                        if (unlikely(!p))
5964                                goto out_overflow;
5965                        pdev->mincount = be32_to_cpup(p);
5966                        dprintk("%s: Min count too small. mincnt = %u\n",
5967                                __func__, pdev->mincount);
5968                }
5969                return status;
5970        }
5971
5972        p = xdr_inline_decode(xdr, 8);
5973        if (unlikely(!p))
5974                goto out_overflow;
5975        type = be32_to_cpup(p++);
5976        if (type != pdev->layout_type) {
5977                dprintk("%s: layout mismatch req: %u pdev: %u\n",
5978                        __func__, pdev->layout_type, type);
5979                return -EINVAL;
5980        }
5981        /*
5982         * Get the length of the opaque device_addr4. xdr_read_pages places
5983         * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5984         * and places the remaining xdr data in xdr_buf->tail
5985         */
5986        pdev->mincount = be32_to_cpup(p);
5987        if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5988                goto out_overflow;
5989
5990        /* Parse notification bitmap, verifying that it is zero. */
5991        p = xdr_inline_decode(xdr, 4);
5992        if (unlikely(!p))
5993                goto out_overflow;
5994        len = be32_to_cpup(p);
5995        if (len) {
5996                uint32_t i;
5997
5998                p = xdr_inline_decode(xdr, 4 * len);
5999                if (unlikely(!p))
6000                        goto out_overflow;

6001
6002                res->notification = be32_to_cpup(p++);
6003                for (i = 1; i < len; i++) {
6004                        if (be32_to_cpup(p++)) {
6005                                dprintk("%s: unsupported notification\n",
6006                                        __func__);
6007                                return -EIO;
6008                        }
6009                }
6010        }
6011        return 0;
6012out_overflow:
6013        print_overflow_msg(__func__, xdr);
6014        return -EIO;
6015}
6016
6017static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
6018                            struct nfs4_layoutget_res *res)
6019{
6020        __be32 *p;
6021        int status;
6022        u32 layout_count;
6023        u32 recvd;
6024
6025        status = decode_op_hdr(xdr, OP_LAYOUTGET);
6026        if (status)
6027                return status;
6028        p = xdr_inline_decode(xdr, 4);
6029        if (unlikely(!p))
6030                goto out_overflow;
6031        res->return_on_close = be32_to_cpup(p);
6032        decode_layout_stateid(xdr, &res->stateid);
6033        p = xdr_inline_decode(xdr, 4);
6034        if (unlikely(!p))
6035                goto out_overflow;
6036        layout_count = be32_to_cpup(p);
6037        if (!layout_count) {
6038                dprintk("%s: server responded with empty layout array\n",
6039                        __func__);
6040                return -EINVAL;
6041        }
6042
6043        p = xdr_inline_decode(xdr, 28);
6044        if (unlikely(!p))
6045                goto out_overflow;
6046        p = xdr_decode_hyper(p, &res->range.offset);
6047        p = xdr_decode_hyper(p, &res->range.length);
6048        res->range.iomode = be32_to_cpup(p++);
6049        res->type = be32_to_cpup(p++);
6050        res->layoutp->len = be32_to_cpup(p);
6051
6052        dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
6053                __func__,
6054                (unsigned long)res->range.offset,
6055                (unsigned long)res->range.length,
6056                res->range.iomode,
6057                res->type,
6058                res->layoutp->len);
6059
6060        recvd = xdr_read_pages(xdr, res->layoutp->len);
6061        if (res->layoutp->len > recvd) {
6062                dprintk("NFS: server cheating in layoutget reply: "
6063                                "layout len %u > recvd %u\n",
6064                                res->layoutp->len, recvd);
6065                return -EINVAL;
6066        }
6067
6068        if (layout_count > 1) {
6069                /* We only handle a length one array at the moment.  Any
6070                 * further entries are just ignored.  Note that this means
6071                 * the client may see a response that is less than the
6072                 * minimum it requested.
6073                 */
6074                dprintk("%s: server responded with %d layouts, dropping tail\n",
6075                        __func__, layout_count);
6076        }
6077
6078        return 0;
6079out_overflow:
6080        print_overflow_msg(__func__, xdr);
6081        return -EIO;
6082}
6083
6084static int decode_layoutreturn(struct xdr_stream *xdr,
6085                               struct nfs4_layoutreturn_res *res)
6086{
6087        __be32 *p;
6088        int status;
6089
6090        status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
6091        if (status)
6092                return status;
6093        p = xdr_inline_decode(xdr, 4);
6094        if (unlikely(!p))
6095                goto out_overflow;
6096        res->lrs_present = be32_to_cpup(p);
6097        if (res->lrs_present)
6098                status = decode_layout_stateid(xdr, &res->stateid);
6099        else
6100                nfs4_stateid_copy(&res->stateid, &invalid_stateid);
6101        return status;
6102out_overflow:
6103        print_overflow_msg(__func__, xdr);
6104        return -EIO;
6105}
6106
6107static int decode_layoutcommit(struct xdr_stream *xdr,
6108                               struct rpc_rqst *req,
6109                               struct nfs4_layoutcommit_res *res)
6110{
6111        __be32 *p;
6112        __u32 sizechanged;
6113        int status;
6114
6115        status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
6116        res->status = status;
6117        if (status)
6118                return status;
6119
6120        p = xdr_inline_decode(xdr, 4);
6121        if (unlikely(!p))
6122                goto out_overflow;
6123        sizechanged = be32_to_cpup(p);
6124
6125        if (sizechanged) {
6126                /* throw away new size */
6127                p = xdr_inline_decode(xdr, 8);
6128                if (unlikely(!p))
6129                        goto out_overflow;
6130        }
6131        return 0;
6132out_overflow:
6133        print_overflow_msg(__func__, xdr);
6134        return -EIO;
6135}
6136
6137static int decode_test_stateid(struct xdr_stream *xdr,
6138                               struct nfs41_test_stateid_res *res)
6139{
6140        __be32 *p;
6141        int status;
6142        int num_res;
6143
6144        status = decode_op_hdr(xdr, OP_TEST_STATEID);
6145        if (status)
6146                return status;
6147
6148        p = xdr_inline_decode(xdr, 4);
6149        if (unlikely(!p))
6150                goto out_overflow;
6151        num_res = be32_to_cpup(p++);
6152        if (num_res != 1)
6153                goto out;
6154
6155        p = xdr_inline_decode(xdr, 4);
6156        if (unlikely(!p))
6157                goto out_overflow;
6158        res->status = be32_to_cpup(p++);
6159
6160        return status;
6161out_overflow:
6162        print_overflow_msg(__func__, xdr);
6163out:
6164        return -EIO;
6165}
6166
6167static int decode_free_stateid(struct xdr_stream *xdr,
6168                               struct nfs41_free_stateid_res *res)
6169{
6170        res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
6171        return res->status;
6172}
6173#else
6174static inline
6175int decode_layoutreturn(struct xdr_stream *xdr,
6176                               struct nfs4_layoutreturn_res *res)
6177{
6178        return 0;
6179}
6180#endif /* CONFIG_NFS_V4_1 */
6181
6182/*
6183 * END OF "GENERIC" DECODE ROUTINES.
6184 */
6185
6186/*
6187 * Decode OPEN_DOWNGRADE response
6188 */
6189static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
6190                                       struct xdr_stream *xdr,
6191                                       void *data)
6192{
6193        struct nfs_closeres *res = data;
6194        struct compound_hdr hdr;
6195        int status;
6196
6197        status = decode_compound_hdr(xdr, &hdr);
6198        if (status)
6199                goto out;
6200        status = decode_sequence(xdr, &res->seq_res, rqstp);
6201        if (status)
6202                goto out;
6203        status = decode_putfh(xdr);
6204        if (status)
6205                goto out;
6206        if (res->lr_res) {
6207                status = decode_layoutreturn(xdr, res->lr_res);
6208                res->lr_ret = status;
6209                if (status)
6210                        goto out;
6211        }
6212        status = decode_open_downgrade(xdr, res);
6213out:
6214        return status;
6215}
6216
6217/*
6218 * Decode ACCESS response
6219 */
6220static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6221                               void *data)
6222{
6223        struct nfs4_accessres *res = data;
6224        struct compound_hdr hdr;
6225        int status;
6226
6227        status = decode_compound_hdr(xdr, &hdr);
6228        if (status)
6229                goto out;
6230        status = decode_sequence(xdr, &res->seq_res, rqstp);
6231        if (status)
6232                goto out;
6233        status = decode_putfh(xdr);
6234        if (status != 0)
6235                goto out;
6236        status = decode_access(xdr, &res->supported, &res->access);
6237        if (status != 0)
6238                goto out;
6239        if (res->fattr)
6240                decode_getfattr(xdr, res->fattr, res->server);
6241out:
6242        return status;
6243}
6244
6245/*
6246 * Decode LOOKUP response
6247 */
6248static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6249                               void *data)
6250{
6251        struct nfs4_lookup_res *res = data;
6252        struct compound_hdr hdr;
6253        int status;
6254
6255        status = decode_compound_hdr(xdr, &hdr);
6256        if (status)
6257                goto out;
6258        status = decode_sequence(xdr, &res->seq_res, rqstp);
6259        if (status)
6260                goto out;
6261        status = decode_putfh(xdr);
6262        if (status)
6263                goto out;
6264        status = decode_lookup(xdr);
6265        if (status)
6266                goto out;
6267        status = decode_getfh(xdr, res->fh);
6268        if (status)
6269                goto out;
6270        status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6271out:
6272        return status;
6273}
6274
6275/*
6276 * Decode LOOKUPP response
6277 */
6278static int nfs4_xdr_dec_lookupp(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6279                void *data)
6280{
6281        struct nfs4_lookupp_res *res = data;
6282        struct compound_hdr hdr;
6283        int status;
6284
6285        status = decode_compound_hdr(xdr, &hdr);
6286        if (status)
6287                goto out;
6288        status = decode_sequence(xdr, &res->seq_res, rqstp);
6289        if (status)
6290                goto out;
6291        status = decode_putfh(xdr);
6292        if (status)
6293                goto out;
6294        status = decode_lookupp(xdr);
6295        if (status)
6296                goto out;
6297        status = decode_getfh(xdr, res->fh);
6298        if (status)
6299                goto out;
6300        status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6301out:
6302        return status;
6303}
6304
6305/*
6306 * Decode LOOKUP_ROOT response
6307 */
6308static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6309                                    struct xdr_stream *xdr,
6310                                    void *data)
6311{
6312        struct nfs4_lookup_res *res = data;
6313        struct compound_hdr hdr;
6314        int status;
6315
6316        status = decode_compound_hdr(xdr, &hdr);
6317        if (status)
6318                goto out;
6319        status = decode_sequence(xdr, &res->seq_res, rqstp);
6320        if (status)
6321                goto out;
6322        status = decode_putrootfh(xdr);
6323        if (status)
6324                goto out;
6325        status = decode_getfh(xdr, res->fh);
6326        if (status == 0)
6327                status = decode_getfattr_label(xdr, res->fattr,
6328                                                res->label, res->server);
6329out:
6330        return status;
6331}
6332
6333/*
6334 * Decode REMOVE response
6335 */
6336static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6337                               void *data)
6338{
6339        struct nfs_removeres *res = data;
6340        struct compound_hdr hdr;
6341        int status;
6342
6343        status = decode_compound_hdr(xdr, &hdr);
6344        if (status)
6345                goto out;
6346        status = decode_sequence(xdr, &res->seq_res, rqstp);
6347        if (status)
6348                goto out;
6349        status = decode_putfh(xdr);
6350        if (status)
6351                goto out;
6352        status = decode_remove(xdr, &res->cinfo);
6353out:
6354        return status;
6355}
6356
6357/*
6358 * Decode RENAME response
6359 */
6360static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6361                               void *data)
6362{
6363        struct nfs_renameres *res = data;
6364        struct compound_hdr hdr;
6365        int status;
6366
6367        status = decode_compound_hdr(xdr, &hdr);
6368        if (status)
6369                goto out;
6370        status = decode_sequence(xdr, &res->seq_res, rqstp);
6371        if (status)
6372                goto out;
6373        status = decode_putfh(xdr);
6374        if (status)
6375                goto out;
6376        status = decode_savefh(xdr);
6377        if (status)
6378                goto out;
6379        status = decode_putfh(xdr);
6380        if (status)
6381                goto out;
6382        status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6383out:
6384        return status;
6385}
6386
6387/*
6388 * Decode LINK response
6389 */
6390static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6391                             void *data)
6392{
6393        struct nfs4_link_res *res = data;
6394        struct compound_hdr hdr;
6395        int status;
6396
6397        status = decode_compound_hdr(xdr, &hdr);
6398        if (status)
6399                goto out;
6400        status = decode_sequence(xdr, &res->seq_res, rqstp);
6401        if (status)
6402                goto out;
6403        status = decode_putfh(xdr);
6404        if (status)
6405                goto out;
6406        status = decode_savefh(xdr);
6407        if (status)
6408                goto out;
6409        status = decode_putfh(xdr);
6410        if (status)
6411                goto out;
6412        status = decode_link(xdr, &res->cinfo);
6413        if (status)
6414                goto out;
6415        /*
6416         * Note order: OP_LINK leaves the directory as the current
6417         *             filehandle.
6418         */
6419        status = decode_restorefh(xdr);
6420        if (status)
6421                goto out;
6422        decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6423out:
6424        return status;
6425}
6426
6427/*
6428 * Decode CREATE response
6429 */
6430static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6431                               void *data)
6432{
6433        struct nfs4_create_res *res = data;
6434        struct compound_hdr hdr;
6435        int status;
6436
6437        status = decode_compound_hdr(xdr, &hdr);
6438        if (status)
6439                goto out;
6440        status = decode_sequence(xdr, &res->seq_res, rqstp);
6441        if (status)
6442                goto out;
6443        status = decode_putfh(xdr);
6444        if (status)
6445                goto out;
6446        status = decode_create(xdr, &res->dir_cinfo);
6447        if (status)
6448                goto out;
6449        status = decode_getfh(xdr, res->fh);
6450        if (status)
6451                goto out;
6452        decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6453out:
6454        return status;
6455}
6456
6457/*
6458 * Decode SYMLINK response
6459 */
6460static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6461                                void *res)
6462{
6463        return nfs4_xdr_dec_create(rqstp, xdr, res);
6464}
6465
6466/*
6467 * Decode GETATTR response
6468 */
6469static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6470                                void *data)
6471{
6472        struct nfs4_getattr_res *res = data;
6473        struct compound_hdr hdr;
6474        int status;
6475
6476        status = decode_compound_hdr(xdr, &hdr);
6477        if (status)
6478                goto out;
6479        status = decode_sequence(xdr, &res->seq_res, rqstp);
6480        if (status)
6481                goto out;
6482        status = decode_putfh(xdr);
6483        if (status)
6484                goto out;
6485        status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6486out:
6487        return status;
6488}
6489
6490/*
6491 * Encode an SETACL request
6492 */
6493static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6494                                const void *data)
6495{
6496        const struct nfs_setaclargs *args = data;
6497        struct compound_hdr hdr = {
6498                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6499        };
6500
6501        encode_compound_hdr(xdr, req, &hdr);
6502        encode_sequence(xdr, &args->seq_args, &hdr);
6503        encode_putfh(xdr, args->fh, &hdr);
6504        encode_setacl(xdr, args, &hdr);
6505        encode_nops(&hdr);
6506}
6507
6508/*
6509 * Decode SETACL response
6510 */
6511static int
6512nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6513                    void *data)
6514{
6515        struct nfs_setaclres *res = data;
6516        struct compound_hdr hdr;
6517        int status;
6518
6519        status = decode_compound_hdr(xdr, &hdr);
6520        if (status)
6521                goto out;
6522        status = decode_sequence(xdr, &res->seq_res, rqstp);
6523        if (status)
6524                goto out;
6525        status = decode_putfh(xdr);
6526        if (status)
6527                goto out;
6528        status = decode_setattr(xdr);
6529out:
6530        return status;
6531}
6532
6533/*
6534 * Decode GETACL response
6535 */
6536static int
6537nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6538                    void *data)
6539{
6540        struct nfs_getaclres *res = data;
6541        struct compound_hdr hdr;
6542        int status;
6543
6544        if (res->acl_scratch != NULL) {
6545                void *p = page_address(res->acl_scratch);
6546                xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6547        }
6548        status = decode_compound_hdr(xdr, &hdr);
6549        if (status)
6550                goto out;
6551        status = decode_sequence(xdr, &res->seq_res, rqstp);
6552        if (status)
6553                goto out;
6554        status = decode_putfh(xdr);
6555        if (status)
6556                goto out;
6557        status = decode_getacl(xdr, rqstp, res);
6558
6559out:
6560        return status;
6561}
6562
6563/*
6564 * Decode CLOSE response
6565 */
6566static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6567                              void *data)
6568{
6569        struct nfs_closeres *res = data;
6570        struct compound_hdr hdr;
6571        int status;
6572
6573        status = decode_compound_hdr(xdr, &hdr);
6574        if (status)
6575                goto out;
6576        status = decode_sequence(xdr, &res->seq_res, rqstp);
6577        if (status)
6578                goto out;
6579        status = decode_putfh(xdr);
6580        if (status)
6581                goto out;
6582        if (res->lr_res) {
6583                status = decode_layoutreturn(xdr, res->lr_res);
6584                res->lr_ret = status;
6585                if (status)
6586                        goto out;
6587        }
6588        if (res->fattr != NULL) {
6589                status = decode_getfattr(xdr, res->fattr, res->server);
6590                if (status != 0)
6591                        goto out;
6592        }
6593        status = decode_close(xdr, res);
6594out:
6595        return status;
6596}
6597
6598/*
6599 * Decode OPEN response
6600 */
6601static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6602                             void *data)
6603{
6604        struct nfs_openres *res = data;
6605        struct compound_hdr hdr;
6606        int status;
6607
6608        status = decode_compound_hdr(xdr, &hdr);
6609        if (status)
6610                goto out;
6611        status = decode_sequence(xdr, &res->seq_res, rqstp);
6612        if (status)
6613                goto out;
6614        status = decode_putfh(xdr);
6615        if (status)
6616                goto out;
6617        status = decode_open(xdr, res);
6618        if (status)
6619                goto out;
6620        status = decode_getfh(xdr, &res->fh);
6621        if (status)
6622                goto out;
6623        if (res->access_request)
6624                decode_access(xdr, &res->access_supported, &res->access_result);
6625        decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6626out:
6627        return status;
6628}
6629
6630/*
6631 * Decode OPEN_CONFIRM response
6632 */
6633static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6634                                     struct xdr_stream *xdr,
6635                                     void *data)
6636{
6637        struct nfs_open_confirmres *res = data;
6638        struct compound_hdr hdr;
6639        int status;
6640
6641        status = decode_compound_hdr(xdr, &hdr);
6642        if (status)
6643                goto out;
6644        status = decode_putfh(xdr);
6645        if (status)
6646                goto out;
6647        status = decode_open_confirm(xdr, res);
6648out:
6649        return status;
6650}
6651
6652/*
6653 * Decode OPEN response
6654 */
6655static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6656                                    struct xdr_stream *xdr,
6657                                    void *data)
6658{
6659        struct nfs_openres *res = data;
6660        struct compound_hdr hdr;
6661        int status;
6662
6663        status = decode_compound_hdr(xdr, &hdr);
6664        if (status)
6665                goto out;
6666        status = decode_sequence(xdr, &res->seq_res, rqstp);
6667        if (status)
6668                goto out;
6669        status = decode_putfh(xdr);
6670        if (status)
6671                goto out;
6672        status = decode_open(xdr, res);
6673        if (status)
6674                goto out;
6675        if (res->access_request)
6676                decode_access(xdr, &res->access_supported, &res->access_result);
6677        decode_getfattr(xdr, res->f_attr, res->server);
6678out:
6679        return status;
6680}
6681
6682/*
6683 * Decode SETATTR response
6684 */
6685static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6686                                struct xdr_stream *xdr,
6687                                void *data)
6688{
6689        struct nfs_setattrres *res = data;
6690        struct compound_hdr hdr;
6691        int status;
6692
6693        status = decode_compound_hdr(xdr, &hdr);
6694        if (status)
6695                goto out;
6696        status = decode_sequence(xdr, &res->seq_res, rqstp);
6697        if (status)
6698                goto out;
6699        status = decode_putfh(xdr);
6700        if (status)
6701                goto out;
6702        status = decode_setattr(xdr);
6703        if (status)
6704                goto out;
6705        decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6706out:
6707        return status;
6708}
6709
6710/*
6711 * Decode LOCK response
6712 */
6713static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6714                             void *data)
6715{
6716        struct nfs_lock_res *res = data;
6717        struct compound_hdr hdr;
6718        int status;
6719
6720        status = decode_compound_hdr(xdr, &hdr);
6721        if (status)
6722                goto out;
6723        status = decode_sequence(xdr, &res->seq_res, rqstp);
6724        if (status)
6725                goto out;
6726        status = decode_putfh(xdr);
6727        if (status)
6728                goto out;
6729        status = decode_lock(xdr, res);
6730out:
6731        return status;
6732}
6733
6734/*
6735 * Decode LOCKT response
6736 */
6737static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6738                              void *data)
6739{
6740        struct nfs_lockt_res *res = data;
6741        struct compound_hdr hdr;
6742        int status;
6743
6744        status = decode_compound_hdr(xdr, &hdr);
6745        if (status)
6746                goto out;
6747        status = decode_sequence(xdr, &res->seq_res, rqstp);
6748        if (status)
6749                goto out;
6750        status = decode_putfh(xdr);
6751        if (status)
6752                goto out;
6753        status = decode_lockt(xdr, res);
6754out:
6755        return status;
6756}
6757
6758/*
6759 * Decode LOCKU response
6760 */
6761static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6762                              void *data)
6763{
6764        struct nfs_locku_res *res = data;
6765        struct compound_hdr hdr;
6766        int status;
6767
6768        status = decode_compound_hdr(xdr, &hdr);
6769        if (status)
6770                goto out;
6771        status = decode_sequence(xdr, &res->seq_res, rqstp);
6772        if (status)
6773                goto out;
6774        status = decode_putfh(xdr);
6775        if (status)
6776                goto out;
6777        status = decode_locku(xdr, res);
6778out:
6779        return status;
6780}
6781
6782static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6783                                          struct xdr_stream *xdr, void *dummy)
6784{
6785        struct compound_hdr hdr;
6786        int status;
6787
6788        status = decode_compound_hdr(xdr, &hdr);
6789        if (!status)
6790                status = decode_release_lockowner(xdr);
6791        return status;
6792}
6793
6794/*
6795 * Decode READLINK response
6796 */
6797static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6798                                 struct xdr_stream *xdr,
6799                                 void *data)
6800{
6801        struct nfs4_readlink_res *res = data;
6802        struct compound_hdr hdr;
6803        int status;
6804
6805        status = decode_compound_hdr(xdr, &hdr);
6806        if (status)
6807                goto out;
6808        status = decode_sequence(xdr, &res->seq_res, rqstp);
6809        if (status)
6810                goto out;
6811        status = decode_putfh(xdr);
6812        if (status)
6813                goto out;
6814        status = decode_readlink(xdr, rqstp);
6815out:
6816        return status;
6817}
6818
6819/*
6820 * Decode READDIR response
6821 */
6822static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6823                                void *data)
6824{
6825        struct nfs4_readdir_res *res = data;
6826        struct compound_hdr hdr;
6827        int status;
6828
6829        status = decode_compound_hdr(xdr, &hdr);
6830        if (status)
6831                goto out;
6832        status = decode_sequence(xdr, &res->seq_res, rqstp);
6833        if (status)
6834                goto out;
6835        status = decode_putfh(xdr);
6836        if (status)
6837                goto out;
6838        status = decode_readdir(xdr, rqstp, res);
6839out:
6840        return status;
6841}
6842
6843/*
6844 * Decode Read response
6845 */
6846static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6847                             void *data)
6848{
6849        struct nfs_pgio_res *res = data;
6850        struct compound_hdr hdr;
6851        int status;
6852
6853        status = decode_compound_hdr(xdr, &hdr);
6854        res->op_status = hdr.status;
6855        if (status)
6856                goto out;
6857        status = decode_sequence(xdr, &res->seq_res, rqstp);
6858        if (status)
6859                goto out;
6860        status = decode_putfh(xdr);
6861        if (status)
6862                goto out;
6863        status = decode_read(xdr, rqstp, res);
6864        if (!status)
6865                status = res->count;
6866out:
6867        return status;
6868}
6869
6870/*
6871 * Decode WRITE response
6872 */
6873static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6874                              void *data)
6875{
6876        struct nfs_pgio_res *res = data;
6877        struct compound_hdr hdr;
6878        int status;
6879
6880        status = decode_compound_hdr(xdr, &hdr);
6881        res->op_status = hdr.status;
6882        if (status)
6883                goto out;
6884        status = decode_sequence(xdr, &res->seq_res, rqstp);
6885        if (status)
6886                goto out;
6887        status = decode_putfh(xdr);
6888        if (status)
6889                goto out;
6890        status = decode_write(xdr, res);
6891        if (status)
6892                goto out;
6893        if (res->fattr)
6894                decode_getfattr(xdr, res->fattr, res->server);
6895        if (!status)
6896                status = res->count;
6897out:
6898        return status;
6899}
6900
6901/*
6902 * Decode COMMIT response
6903 */
6904static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6905                               void *data)
6906{
6907        struct nfs_commitres *res = data;
6908        struct compound_hdr hdr;
6909        int status;
6910
6911        status = decode_compound_hdr(xdr, &hdr);
6912        res->op_status = hdr.status;
6913        if (status)
6914                goto out;
6915        status = decode_sequence(xdr, &res->seq_res, rqstp);
6916        if (status)
6917                goto out;
6918        status = decode_putfh(xdr);
6919        if (status)
6920                goto out;
6921        status = decode_commit(xdr, res);
6922out:
6923        return status;
6924}
6925
6926/*
6927 * Decode FSINFO response
6928 */
6929static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6930                               void *data)
6931{
6932        struct nfs4_fsinfo_res *res = data;
6933        struct compound_hdr hdr;
6934        int status;
6935
6936        status = decode_compound_hdr(xdr, &hdr);
6937        if (!status)
6938                status = decode_sequence(xdr, &res->seq_res, req);
6939        if (!status)
6940                status = decode_putfh(xdr);
6941        if (!status)
6942                status = decode_fsinfo(xdr, res->fsinfo);
6943        return status;
6944}
6945
6946/*
6947 * Decode PATHCONF response
6948 */
6949static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6950                                 void *data)
6951{
6952        struct nfs4_pathconf_res *res = data;
6953        struct compound_hdr hdr;
6954        int status;
6955
6956        status = decode_compound_hdr(xdr, &hdr);
6957        if (!status)
6958                status = decode_sequence(xdr, &res->seq_res, req);
6959        if (!status)
6960                status = decode_putfh(xdr);
6961        if (!status)
6962                status = decode_pathconf(xdr, res->pathconf);
6963        return status;
6964}
6965
6966/*
6967 * Decode STATFS response
6968 */
6969static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6970                               void *data)
6971{
6972        struct nfs4_statfs_res *res = data;
6973        struct compound_hdr hdr;
6974        int status;
6975
6976        status = decode_compound_hdr(xdr, &hdr);
6977        if (!status)
6978                status = decode_sequence(xdr, &res->seq_res, req);
6979        if (!status)
6980                status = decode_putfh(xdr);
6981        if (!status)
6982                status = decode_statfs(xdr, res->fsstat);
6983        return status;
6984}
6985
6986/*
6987 * Decode GETATTR_BITMAP response
6988 */
6989static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6990                                    struct xdr_stream *xdr,
6991                                    void *data)
6992{
6993        struct nfs4_server_caps_res *res = data;
6994        struct compound_hdr hdr;
6995        int status;
6996
6997        status = decode_compound_hdr(xdr, &hdr);
6998        if (status)
6999                goto out;
7000        status = decode_sequence(xdr, &res->seq_res, req);

7001        if (status)
7002                goto out;
7003        status = decode_putfh(xdr);
7004        if (status)
7005                goto out;
7006        status = decode_server_caps(xdr, res);
7007out:
7008        return status;
7009}
7010
7011/*
7012 * Decode RENEW response
7013 */
7014static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
7015                              void *__unused)
7016{
7017        struct compound_hdr hdr;
7018        int status;
7019
7020        status = decode_compound_hdr(xdr, &hdr);
7021        if (!status)
7022                status = decode_renew(xdr);
7023        return status;
7024}
7025
7026/*
7027 * Decode SETCLIENTID response
7028 */
7029static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
7030                                    struct xdr_stream *xdr,
7031                                    void *data)
7032{
7033        struct nfs4_setclientid_res *res = data;
7034        struct compound_hdr hdr;
7035        int status;
7036
7037        status = decode_compound_hdr(xdr, &hdr);
7038        if (!status)
7039                status = decode_setclientid(xdr, res);
7040        return status;
7041}
7042
7043/*
7044 * Decode SETCLIENTID_CONFIRM response
7045 */
7046static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
7047                                            struct xdr_stream *xdr,
7048                                            void *data)
7049{
7050        struct compound_hdr hdr;
7051        int status;
7052
7053        status = decode_compound_hdr(xdr, &hdr);
7054        if (!status)
7055                status = decode_setclientid_confirm(xdr);
7056        return status;
7057}
7058
7059/*
7060 * Decode DELEGRETURN response
7061 */
7062static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
7063                                    struct xdr_stream *xdr,
7064                                    void *data)
7065{
7066        struct nfs4_delegreturnres *res = data;
7067        struct compound_hdr hdr;
7068        int status;
7069
7070        status = decode_compound_hdr(xdr, &hdr);
7071        if (status)
7072                goto out;
7073        status = decode_sequence(xdr, &res->seq_res, rqstp);
7074        if (status)
7075                goto out;
7076        status = decode_putfh(xdr);
7077        if (status != 0)
7078                goto out;
7079        if (res->lr_res) {
7080                status = decode_layoutreturn(xdr, res->lr_res);
7081                res->lr_ret = status;
7082                if (status)
7083                        goto out;
7084        }
7085        if (res->fattr) {
7086                status = decode_getfattr(xdr, res->fattr, res->server);
7087                if (status != 0)
7088                        goto out;
7089        }
7090        status = decode_delegreturn(xdr);
7091out:
7092        return status;
7093}
7094
7095/*
7096 * Decode FS_LOCATIONS response
7097 */
7098static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
7099                                     struct xdr_stream *xdr,
7100                                     void *data)
7101{
7102        struct nfs4_fs_locations_res *res = data;
7103        struct compound_hdr hdr;
7104        int status;
7105
7106        status = decode_compound_hdr(xdr, &hdr);
7107        if (status)
7108                goto out;
7109        status = decode_sequence(xdr, &res->seq_res, req);
7110        if (status)
7111                goto out;
7112        status = decode_putfh(xdr);
7113        if (status)
7114                goto out;
7115        if (res->migration) {
7116                xdr_enter_page(xdr, PAGE_SIZE);
7117                status = decode_getfattr_generic(xdr,
7118                                        &res->fs_locations->fattr,
7119                                         NULL, res->fs_locations,
7120                                         NULL, res->fs_locations->server);
7121                if (status)
7122                        goto out;
7123                if (res->renew)
7124                        status = decode_renew(xdr);
7125        } else {
7126                status = decode_lookup(xdr);
7127                if (status)
7128                        goto out;
7129                xdr_enter_page(xdr, PAGE_SIZE);
7130                status = decode_getfattr_generic(xdr,
7131                                        &res->fs_locations->fattr,
7132                                         NULL, res->fs_locations,
7133                                         NULL, res->fs_locations->server);
7134        }
7135out:
7136        return status;
7137}
7138
7139/*
7140 * Decode SECINFO response
7141 */
7142static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
7143                                struct xdr_stream *xdr,
7144                                void *data)
7145{
7146        struct nfs4_secinfo_res *res = data;
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_putfh(xdr);
7157        if (status)
7158                goto out;
7159        status = decode_secinfo(xdr, res);
7160out:
7161        return status;
7162}
7163
7164/*
7165 * Decode FSID_PRESENT response
7166 */
7167static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
7168                                     struct xdr_stream *xdr,
7169                                     void *data)
7170{
7171        struct nfs4_fsid_present_res *res = data;
7172        struct compound_hdr hdr;
7173        int status;
7174
7175        status = decode_compound_hdr(xdr, &hdr);
7176        if (status)
7177                goto out;
7178        status = decode_sequence(xdr, &res->seq_res, rqstp);
7179        if (status)
7180                goto out;
7181        status = decode_putfh(xdr);
7182        if (status)
7183                goto out;
7184        status = decode_getfh(xdr, res->fh);
7185        if (status)
7186                goto out;
7187        if (res->renew)
7188                status = decode_renew(xdr);
7189out:
7190        return status;
7191}
7192
7193#if defined(CONFIG_NFS_V4_1)
7194/*
7195 * Decode BIND_CONN_TO_SESSION response
7196 */
7197static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
7198                                        struct xdr_stream *xdr,
7199                                        void *res)
7200{
7201        struct compound_hdr hdr;
7202        int status;
7203
7204        status = decode_compound_hdr(xdr, &hdr);
7205        if (!status)
7206                status = decode_bind_conn_to_session(xdr, res);
7207        return status;
7208}
7209
7210/*
7211 * Decode EXCHANGE_ID response
7212 */
7213static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
7214                                    struct xdr_stream *xdr,
7215                                    void *res)
7216{
7217        struct compound_hdr hdr;
7218        int status;
7219
7220        status = decode_compound_hdr(xdr, &hdr);
7221        if (!status)
7222                status = decode_exchange_id(xdr, res);
7223        return status;
7224}
7225
7226/*
7227 * Decode CREATE_SESSION response
7228 */
7229static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
7230                                       struct xdr_stream *xdr,
7231                                       void *res)
7232{
7233        struct compound_hdr hdr;
7234        int status;
7235
7236        status = decode_compound_hdr(xdr, &hdr);
7237        if (!status)
7238                status = decode_create_session(xdr, res);
7239        return status;
7240}
7241
7242/*
7243 * Decode DESTROY_SESSION response
7244 */
7245static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
7246                                        struct xdr_stream *xdr,
7247                                        void *res)
7248{
7249        struct compound_hdr hdr;
7250        int status;
7251
7252        status = decode_compound_hdr(xdr, &hdr);
7253        if (!status)
7254                status = decode_destroy_session(xdr, res);
7255        return status;
7256}
7257
7258/*
7259 * Decode DESTROY_CLIENTID response
7260 */
7261static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
7262                                        struct xdr_stream *xdr,
7263                                        void *res)
7264{
7265        struct compound_hdr hdr;
7266        int status;
7267
7268        status = decode_compound_hdr(xdr, &hdr);
7269        if (!status)
7270                status = decode_destroy_clientid(xdr, res);
7271        return status;
7272}
7273
7274/*
7275 * Decode SEQUENCE response
7276 */
7277static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
7278                                 struct xdr_stream *xdr,
7279                                 void *res)
7280{
7281        struct compound_hdr hdr;
7282        int status;
7283
7284        status = decode_compound_hdr(xdr, &hdr);
7285        if (!status)
7286                status = decode_sequence(xdr, res, rqstp);
7287        return status;
7288}
7289
7290/*
7291 * Decode GET_LEASE_TIME response
7292 */
7293static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
7294                                       struct xdr_stream *xdr,
7295                                       void *data)
7296{
7297        struct nfs4_get_lease_time_res *res = data;
7298        struct compound_hdr hdr;
7299        int status;
7300
7301        status = decode_compound_hdr(xdr, &hdr);
7302        if (!status)
7303                status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
7304        if (!status)
7305                status = decode_putrootfh(xdr);
7306        if (!status)
7307                status = decode_fsinfo(xdr, res->lr_fsinfo);
7308        return status;
7309}
7310
7311/*
7312 * Decode RECLAIM_COMPLETE response
7313 */
7314static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7315                                         struct xdr_stream *xdr,
7316                                         void *data)
7317{
7318        struct nfs41_reclaim_complete_res *res = data;
7319        struct compound_hdr hdr;
7320        int status;
7321
7322        status = decode_compound_hdr(xdr, &hdr);
7323        if (!status)
7324                status = decode_sequence(xdr, &res->seq_res, rqstp);
7325        if (!status)
7326                status = decode_reclaim_complete(xdr, NULL);
7327        return status;
7328}
7329
7330/*
7331 * Decode GETDEVINFO response
7332 */
7333static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7334                                      struct xdr_stream *xdr,
7335                                      void *data)
7336{
7337        struct nfs4_getdeviceinfo_res *res = data;
7338        struct compound_hdr hdr;
7339        int status;
7340
7341        status = decode_compound_hdr(xdr, &hdr);
7342        if (status != 0)
7343                goto out;
7344        status = decode_sequence(xdr, &res->seq_res, rqstp);
7345        if (status != 0)
7346                goto out;
7347        status = decode_getdeviceinfo(xdr, res);
7348out:
7349        return status;
7350}
7351
7352/*
7353 * Decode LAYOUTGET response
7354 */
7355static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7356                                  struct xdr_stream *xdr,
7357                                  void *data)
7358{
7359        struct nfs4_layoutget_res *res = data;
7360        struct compound_hdr hdr;
7361        int status;
7362
7363        status = decode_compound_hdr(xdr, &hdr);
7364        if (status)
7365                goto out;
7366        status = decode_sequence(xdr, &res->seq_res, rqstp);
7367        if (status)
7368                goto out;
7369        status = decode_putfh(xdr);
7370        if (status)
7371                goto out;
7372        status = decode_layoutget(xdr, rqstp, res);
7373out:
7374        return status;
7375}
7376
7377/*
7378 * Decode LAYOUTRETURN response
7379 */
7380static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7381                                     struct xdr_stream *xdr,
7382                                     void *data)
7383{
7384        struct nfs4_layoutreturn_res *res = data;
7385        struct compound_hdr hdr;
7386        int status;
7387
7388        status = decode_compound_hdr(xdr, &hdr);
7389        if (status)
7390                goto out;
7391        status = decode_sequence(xdr, &res->seq_res, rqstp);
7392        if (status)
7393                goto out;
7394        status = decode_putfh(xdr);
7395        if (status)
7396                goto out;
7397        status = decode_layoutreturn(xdr, res);
7398out:
7399        return status;
7400}
7401
7402/*
7403 * Decode LAYOUTCOMMIT response
7404 */
7405static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7406                                     struct xdr_stream *xdr,
7407                                     void *data)
7408{
7409        struct nfs4_layoutcommit_res *res = data;
7410        struct compound_hdr hdr;
7411        int status;
7412
7413        status = decode_compound_hdr(xdr, &hdr);
7414        if (status)
7415                goto out;
7416        status = decode_sequence(xdr, &res->seq_res, rqstp);
7417        if (status)
7418                goto out;
7419        status = decode_putfh(xdr);
7420        if (status)
7421                goto out;
7422        status = decode_layoutcommit(xdr, rqstp, res);
7423        if (status)
7424                goto out;
7425        decode_getfattr(xdr, res->fattr, res->server);
7426out:
7427        return status;
7428}
7429
7430/*
7431 * Decode SECINFO_NO_NAME response
7432 */
7433static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7434                                        struct xdr_stream *xdr,
7435                                        void *data)
7436{
7437        struct nfs4_secinfo_res *res = data;
7438        struct compound_hdr hdr;
7439        int status;
7440
7441        status = decode_compound_hdr(xdr, &hdr);
7442        if (status)
7443                goto out;
7444        status = decode_sequence(xdr, &res->seq_res, rqstp);
7445        if (status)
7446                goto out;
7447        status = decode_putrootfh(xdr);
7448        if (status)
7449                goto out;
7450        status = decode_secinfo_no_name(xdr, res);
7451out:
7452        return status;
7453}
7454
7455/*
7456 * Decode TEST_STATEID response
7457 */
7458static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7459                                     struct xdr_stream *xdr,
7460                                     void *data)
7461{
7462        struct nfs41_test_stateid_res *res = data;
7463        struct compound_hdr hdr;
7464        int status;
7465
7466        status = decode_compound_hdr(xdr, &hdr);
7467        if (status)
7468                goto out;
7469        status = decode_sequence(xdr, &res->seq_res, rqstp);
7470        if (status)
7471                goto out;
7472        status = decode_test_stateid(xdr, res);
7473out:
7474        return status;
7475}
7476
7477/*
7478 * Decode FREE_STATEID response
7479 */
7480static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7481                                     struct xdr_stream *xdr,
7482                                     void *data)
7483{
7484        struct nfs41_free_stateid_res *res = data;
7485        struct compound_hdr hdr;
7486        int status;
7487
7488        status = decode_compound_hdr(xdr, &hdr);
7489        if (status)
7490                goto out;
7491        status = decode_sequence(xdr, &res->seq_res, rqstp);
7492        if (status)
7493                goto out;
7494        status = decode_free_stateid(xdr, res);
7495out:
7496        return status;
7497}
7498#endif /* CONFIG_NFS_V4_1 */
7499
7500/**
7501 * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7502 *                      the local page cache.
7503 * @xdr: XDR stream where entry resides
7504 * @entry: buffer to fill in with entry data
7505 * @plus: boolean indicating whether this should be a readdirplus entry
7506 *
7507 * Returns zero if successful, otherwise a negative errno value is
7508 * returned.
7509 *
7510 * This function is not invoked during READDIR reply decoding, but
7511 * rather whenever an application invokes the getdents(2) system call
7512 * on a directory already in our cache.
7513 */
7514int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7515                       bool plus)
7516{
7517        unsigned int savep;
7518        uint32_t bitmap[3] = {0};
7519        uint32_t len;
7520        uint64_t new_cookie;
7521        __be32 *p = xdr_inline_decode(xdr, 4);
7522        if (unlikely(!p))
7523                goto out_overflow;
7524        if (*p == xdr_zero) {
7525                p = xdr_inline_decode(xdr, 4);
7526                if (unlikely(!p))
7527                        goto out_overflow;
7528                if (*p == xdr_zero)
7529                        return -EAGAIN;
7530                entry->eof = 1;
7531                return -EBADCOOKIE;
7532        }
7533
7534        p = xdr_inline_decode(xdr, 12);
7535        if (unlikely(!p))
7536                goto out_overflow;
7537        p = xdr_decode_hyper(p, &new_cookie);
7538        entry->len = be32_to_cpup(p);
7539
7540        p = xdr_inline_decode(xdr, entry->len);
7541        if (unlikely(!p))
7542                goto out_overflow;
7543        entry->name = (const char *) p;
7544
7545        /*
7546         * In case the server doesn't return an inode number,
7547         * we fake one here.  (We don't use inode number 0,
7548         * since glibc seems to choke on it...)
7549         */
7550        entry->ino = 1;
7551        entry->fattr->valid = 0;
7552
7553        if (decode_attr_bitmap(xdr, bitmap) < 0)
7554                goto out_overflow;
7555
7556        if (decode_attr_length(xdr, &len, &savep) < 0)
7557                goto out_overflow;
7558
7559        if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7560                        NULL, entry->label, entry->server) < 0)
7561                goto out_overflow;
7562        if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7563                entry->ino = entry->fattr->mounted_on_fileid;
7564        else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7565                entry->ino = entry->fattr->fileid;
7566
7567        entry->d_type = DT_UNKNOWN;
7568        if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7569                entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7570
7571        entry->prev_cookie = entry->cookie;
7572        entry->cookie = new_cookie;
7573
7574        return 0;
7575
7576out_overflow:
7577        print_overflow_msg(__func__, xdr);
7578        return -EAGAIN;
7579}
7580
7581/*
7582 * We need to translate between nfs status return values and
7583 * the local errno values which may not be the same.
7584 */
7585static struct {
7586        int stat;
7587        int errno;
7588} nfs_errtbl[] = {
7589        { NFS4_OK,              0               },
7590        { NFS4ERR_PERM,         -EPERM          },
7591        { NFS4ERR_NOENT,        -ENOENT         },
7592        { NFS4ERR_IO,           -errno_NFSERR_IO},
7593        { NFS4ERR_NXIO,         -ENXIO          },
7594        { NFS4ERR_ACCESS,       -EACCES         },
7595        { NFS4ERR_EXIST,        -EEXIST         },
7596        { NFS4ERR_XDEV,         -EXDEV          },
7597        { NFS4ERR_NOTDIR,       -ENOTDIR        },
7598        { NFS4ERR_ISDIR,        -EISDIR         },
7599        { NFS4ERR_INVAL,        -EINVAL         },
7600        { NFS4ERR_FBIG,         -EFBIG          },
7601        { NFS4ERR_NOSPC,        -ENOSPC         },
7602        { NFS4ERR_ROFS,         -EROFS          },
7603        { NFS4ERR_MLINK,        -EMLINK         },
7604        { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
7605        { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
7606        { NFS4ERR_DQUOT,        -EDQUOT         },
7607        { NFS4ERR_STALE,        -ESTALE         },
7608        { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
7609        { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
7610        { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
7611        { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
7612        { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
7613        { NFS4ERR_BADTYPE,      -EBADTYPE       },
7614        { NFS4ERR_LOCKED,       -EAGAIN         },
7615        { NFS4ERR_SYMLINK,      -ELOOP          },
7616        { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
7617        { NFS4ERR_DEADLOCK,     -EDEADLK        },
7618        { -1,                   -EIO            }
7619};
7620
7621/*
7622 * Convert an NFS error code to a local one.
7623 * This one is used jointly by NFSv2 and NFSv3.
7624 */
7625static int
7626nfs4_stat_to_errno(int stat)
7627{
7628        int i;
7629        for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7630                if (nfs_errtbl[i].stat == stat)
7631                        return nfs_errtbl[i].errno;
7632        }
7633        if (stat <= 10000 || stat > 10100) {
7634                /* The server is looney tunes. */
7635                return -EREMOTEIO;
7636        }
7637        /* If we cannot translate the error, the recovery routines should
7638         * handle it.
7639         * Note: remaining NFSv4 error codes have values > 10000, so should
7640         * not conflict with native Linux error codes.
7641         */
7642        return -stat;
7643}
7644
7645#ifdef CONFIG_NFS_V4_2
7646#include "nfs42xdr.c"
7647#endif /* CONFIG_NFS_V4_2 */
7648
7649#define PROC(proc, argtype, restype)                            \
7650[NFSPROC4_CLNT_##proc] = {                                      \
7651        .p_proc   = NFSPROC4_COMPOUND,                          \
7652        .p_encode = nfs4_xdr_##argtype,                         \
7653        .p_decode = nfs4_xdr_##restype,                         \
7654        .p_arglen = NFS4_##argtype##_sz,                        \
7655        .p_replen = NFS4_##restype##_sz,                        \
7656        .p_statidx = NFSPROC4_CLNT_##proc,                      \
7657        .p_name   = #proc,                                      \
7658}
7659
7660#define STUB(proc)              \
7661[NFSPROC4_CLNT_##proc] = {      \
7662        .p_name = #proc,        \
7663}
7664
7665#if defined(CONFIG_NFS_V4_1)
7666#define PROC41(proc, argtype, restype)                          \
7667        PROC(proc, argtype, restype)
7668#else
7669#define PROC41(proc, argtype, restype)                          \
7670        STUB(proc)
7671#endif
7672
7673#if defined(CONFIG_NFS_V4_2)
7674#define PROC42(proc, argtype, restype)                          \
7675        PROC(proc, argtype, restype)
7676#else
7677#define PROC42(proc, argtype, restype)                          \
7678        STUB(proc)
7679#endif
7680
7681const struct rpc_procinfo nfs4_procedures[] = {
7682        PROC(READ,              enc_read,               dec_read),
7683        PROC(WRITE,             enc_write,              dec_write),
7684        PROC(COMMIT,            enc_commit,             dec_commit),
7685        PROC(OPEN,              enc_open,               dec_open),
7686        PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
7687        PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
7688        PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
7689        PROC(CLOSE,             enc_close,              dec_close),
7690        PROC(SETATTR,           enc_setattr,            dec_setattr),
7691        PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
7692        PROC(RENEW,             enc_renew,              dec_renew),
7693        PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
7694        PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7695        PROC(LOCK,              enc_lock,               dec_lock),
7696        PROC(LOCKT,             enc_lockt,              dec_lockt),
7697        PROC(LOCKU,             enc_locku,              dec_locku),
7698        PROC(ACCESS,            enc_access,             dec_access),
7699        PROC(GETATTR,           enc_getattr,            dec_getattr),
7700        PROC(LOOKUP,            enc_lookup,             dec_lookup),
7701        PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
7702        PROC(REMOVE,            enc_remove,             dec_remove),
7703        PROC(RENAME,            enc_rename,             dec_rename),
7704        PROC(LINK,              enc_link,               dec_link),
7705        PROC(SYMLINK,           enc_symlink,            dec_symlink),
7706        PROC(CREATE,            enc_create,             dec_create),
7707        PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
7708        PROC(STATFS,            enc_statfs,             dec_statfs),
7709        PROC(READLINK,          enc_readlink,           dec_readlink),
7710        PROC(READDIR,           enc_readdir,            dec_readdir),
7711        PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
7712        PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
7713        PROC(GETACL,            enc_getacl,             dec_getacl),
7714        PROC(SETACL,            enc_setacl,             dec_setacl),
7715        PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
7716        PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
7717        PROC(SECINFO,           enc_secinfo,            dec_secinfo),
7718        PROC(FSID_PRESENT,      enc_fsid_present,       dec_fsid_present),
7719        PROC41(EXCHANGE_ID,     enc_exchange_id,        dec_exchange_id),
7720        PROC41(CREATE_SESSION,  enc_create_session,     dec_create_session),
7721        PROC41(DESTROY_SESSION, enc_destroy_session,    dec_destroy_session),
7722        PROC41(SEQUENCE,        enc_sequence,           dec_sequence),
7723        PROC41(GET_LEASE_TIME,  enc_get_lease_time,     dec_get_lease_time),
7724        PROC41(RECLAIM_COMPLETE,enc_reclaim_complete,   dec_reclaim_complete),
7725        PROC41(GETDEVICEINFO,   enc_getdeviceinfo,      dec_getdeviceinfo),
7726        PROC41(LAYOUTGET,       enc_layoutget,          dec_layoutget),
7727        PROC41(LAYOUTCOMMIT,    enc_layoutcommit,       dec_layoutcommit),
7728        PROC41(LAYOUTRETURN,    enc_layoutreturn,       dec_layoutreturn),
7729        PROC41(SECINFO_NO_NAME, enc_secinfo_no_name,    dec_secinfo_no_name),
7730        PROC41(TEST_STATEID,    enc_test_stateid,       dec_test_stateid),
7731        PROC41(FREE_STATEID,    enc_free_stateid,       dec_free_stateid),
7732        STUB(GETDEVICELIST),
7733        PROC41(BIND_CONN_TO_SESSION,
7734                        enc_bind_conn_to_session, dec_bind_conn_to_session),
7735        PROC41(DESTROY_CLIENTID,enc_destroy_clientid,   dec_destroy_clientid),
7736        PROC42(SEEK,            enc_seek,               dec_seek),
7737        PROC42(ALLOCATE,        enc_allocate,           dec_allocate),
7738        PROC42(DEALLOCATE,      enc_deallocate,         dec_deallocate),
7739        PROC42(LAYOUTSTATS,     enc_layoutstats,        dec_layoutstats),
7740        PROC42(CLONE,           enc_clone,              dec_clone),
7741        PROC42(COPY,            enc_copy,               dec_copy),
7742        PROC(LOOKUPP,           enc_lookupp,            dec_lookupp),
7743};
7744
7745static unsigned int nfs_version4_counts[ARRAY_SIZE(nfs4_procedures)];
7746const struct rpc_version nfs_version4 = {
7747        .number                 = 4,
7748        .nrprocs                = ARRAY_SIZE(nfs4_procedures),
7749        .procs                  = nfs4_procedures,
7750        .counts                 = nfs_version4_counts,
7751};
7752
7753/*
7754 * Local variables:
7755 *  c-basic-offset: 8
7756 * End:
7757 */
7758